From a86067f587a9460e5f004469d183a76d3a2ab068 Mon Sep 17 00:00:00 2001 From: Firoz Khan Date: Tue, 13 Nov 2018 15:49:28 +0530 Subject: [PATCH 01/25] xtensa: add __NR_syscalls along with __NR_syscall_count __NR_syscall_count macro holds the number of system call exist in xtensa architecture. We have to change the value of __NR_syscall_count, if we add or delete a system call. One of the patch in this patch series has a script which will generate a uapi header based on syscall.tbl file. The syscall.tbl file contains the total number of system calls information. So we have two option to update __NR- _syscall_count value. 1. Update __NR_syscall_count in asm/unistd.h manually by counting the no.of system calls. No need to update __NR- _syscall_count until we either add a new system call or delete existing system call. 2. We can keep this feature it above mentioned script, that will count the number of syscalls and keep it in a generated file. In this case we don't need to expli- citly update __NR_syscall_count in asm/unistd.h file. The 2nd option will be the recommended one. For that, I added the __NR_syscalls macro in uapi/asm/unistd.h. The macro __NR_syscalls also added for making the name convention same across all architecture. While __NR_syscalls isn't strictly part of the uapi, having it as part of the generated header to simplifies the implementation. We also need to enclose this macro with #ifdef __KERNEL__ to avoid side effects. Signed-off-by: Firoz Khan Signed-off-by: Max Filippov [Max: Drop __NR_syscall_count completely, use __NR_syscalls instead] --- arch/xtensa/include/uapi/asm/unistd.h | 4 +++- arch/xtensa/kernel/entry.S | 2 +- arch/xtensa/kernel/syscall.c | 4 ++-- 3 files changed, 6 insertions(+), 4 deletions(-) diff --git a/arch/xtensa/include/uapi/asm/unistd.h b/arch/xtensa/include/uapi/asm/unistd.h index bc3f62db5c5f..332d67a6f76c 100644 --- a/arch/xtensa/include/uapi/asm/unistd.h +++ b/arch/xtensa/include/uapi/asm/unistd.h @@ -778,7 +778,9 @@ __SYSCALL(350, sys_pkey_free, 1) #define __NR_statx 351 __SYSCALL(351, sys_statx, 5) -#define __NR_syscall_count 352 +#ifdef __KERNEL__ +#define __NR_syscalls 352 +#endif /* * sysxtensa syscall handler diff --git a/arch/xtensa/kernel/entry.S b/arch/xtensa/kernel/entry.S index 9cbc380e9572..b0007567e497 100644 --- a/arch/xtensa/kernel/entry.S +++ b/arch/xtensa/kernel/entry.S @@ -1874,7 +1874,7 @@ ENTRY(system_call) /* syscall = sys_call_table[syscall_nr] */ movi a4, sys_call_table - movi a5, __NR_syscall_count + movi a5, __NR_syscalls movi a6, -ENOSYS bgeu a3, a5, 1f diff --git a/arch/xtensa/kernel/syscall.c b/arch/xtensa/kernel/syscall.c index 8201748da05b..8b417c9957c7 100644 --- a/arch/xtensa/kernel/syscall.c +++ b/arch/xtensa/kernel/syscall.c @@ -30,8 +30,8 @@ typedef void (*syscall_t)(void); -syscall_t sys_call_table[__NR_syscall_count] /* FIXME __cacheline_aligned */= { - [0 ... __NR_syscall_count - 1] = (syscall_t)&sys_ni_syscall, +syscall_t sys_call_table[__NR_syscalls] /* FIXME __cacheline_aligned */= { + [0 ... __NR_syscalls - 1] = (syscall_t)&sys_ni_syscall, #define __SYSCALL(nr,symbol,nargs) [ nr ] = (syscall_t)symbol, #include From c7914ef69dbb325d3d36f68a4befa282d0e0ddc8 Mon Sep 17 00:00:00 2001 From: Firoz Khan Date: Tue, 13 Nov 2018 15:49:29 +0530 Subject: [PATCH 02/25] xtensa: add system call table generation support The system call tables are in different format in all architecture and it will be difficult to manually add, modify or delete the syscall table entries in the res- pective files. To make it easy by keeping a script and which will generate the uapi header and syscall table file. This change will also help to unify the implemen- tation across all architectures. The system call table generation script is added in kernel/syscalls directory which contain the scripts to generate both uapi header file and system call table files. The syscall.tbl will be input for the scripts. syscall.tbl contains the list of available system calls along with system call number and corresponding entry point. Add a new system call in this architecture will be possible by adding new entry in the syscall.tbl file. Adding a new table entry consisting of: - System call number. - ABI. - System call name. - Entry point name. syscallhdr.sh and syscalltbl.sh will generate uapi header unistd_32.h and syscall_table.h files respectively. Both .sh files will parse the content syscall.tbl to generate the header and table files. unistd_32.h will be included by uapi/asm/unistd.h and syscall_table.h is included by kernel/syscall.c - the real system call table. ARM, s390 and x86 architecuture does have similar support. I leverage their implementation to come up with a generic solution. Signed-off-by: Firoz Khan Signed-off-by: Max Filippov --- arch/xtensa/kernel/syscalls/Makefile | 38 +++ arch/xtensa/kernel/syscalls/syscall.tbl | 374 ++++++++++++++++++++++ arch/xtensa/kernel/syscalls/syscallhdr.sh | 36 +++ arch/xtensa/kernel/syscalls/syscalltbl.sh | 32 ++ 4 files changed, 480 insertions(+) create mode 100644 arch/xtensa/kernel/syscalls/Makefile create mode 100644 arch/xtensa/kernel/syscalls/syscall.tbl create mode 100644 arch/xtensa/kernel/syscalls/syscallhdr.sh create mode 100644 arch/xtensa/kernel/syscalls/syscalltbl.sh diff --git a/arch/xtensa/kernel/syscalls/Makefile b/arch/xtensa/kernel/syscalls/Makefile new file mode 100644 index 000000000000..659faefdcb1d --- /dev/null +++ b/arch/xtensa/kernel/syscalls/Makefile @@ -0,0 +1,38 @@ +# SPDX-License-Identifier: GPL-2.0 +kapi := arch/$(SRCARCH)/include/generated/asm +uapi := arch/$(SRCARCH)/include/generated/uapi/asm + +_dummy := $(shell [ -d '$(uapi)' ] || mkdir -p '$(uapi)') \ + $(shell [ -d '$(kapi)' ] || mkdir -p '$(kapi)') + +syscall := $(srctree)/$(src)/syscall.tbl +syshdr := $(srctree)/$(src)/syscallhdr.sh +systbl := $(srctree)/$(src)/syscalltbl.sh + +quiet_cmd_syshdr = SYSHDR $@ + cmd_syshdr = $(CONFIG_SHELL) '$(syshdr)' '$<' '$@' \ + '$(syshdr_abis_$(basetarget))' \ + '$(syshdr_pfx_$(basetarget))' \ + '$(syshdr_offset_$(basetarget))' + +quiet_cmd_systbl = SYSTBL $@ + cmd_systbl = $(CONFIG_SHELL) '$(systbl)' '$<' '$@' \ + '$(systbl_abis_$(basetarget))' \ + '$(systbl_abi_$(basetarget))' \ + '$(systbl_offset_$(basetarget))' + +$(uapi)/unistd_32.h: $(syscall) $(syshdr) + $(call if_changed,syshdr) + +$(kapi)/syscall_table.h: $(syscall) $(systbl) + $(call if_changed,systbl) + +uapisyshdr-y += unistd_32.h +kapisyshdr-y += syscall_table.h + +targets += $(uapisyshdr-y) $(kapisyshdr-y) + +PHONY += all +all: $(addprefix $(uapi)/,$(uapisyshdr-y)) +all: $(addprefix $(kapi)/,$(kapisyshdr-y)) + @: diff --git a/arch/xtensa/kernel/syscalls/syscall.tbl b/arch/xtensa/kernel/syscalls/syscall.tbl new file mode 100644 index 000000000000..69cf91b03b26 --- /dev/null +++ b/arch/xtensa/kernel/syscalls/syscall.tbl @@ -0,0 +1,374 @@ +# SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note +# +# system call numbers and entry vectors for xtensa +# +# The format is: +# +# +# The is always "common" for this file +# +0 common spill sys_ni_syscall +1 common xtensa sys_ni_syscall +2 common available4 sys_ni_syscall +3 common available5 sys_ni_syscall +4 common available6 sys_ni_syscall +5 common available7 sys_ni_syscall +6 common available8 sys_ni_syscall +7 common available9 sys_ni_syscall +# File Operations +8 common open sys_open +9 common close sys_close +10 common dup sys_dup +11 common dup2 sys_dup2 +12 common read sys_read +13 common write sys_write +14 common select sys_select +15 common lseek sys_lseek +16 common poll sys_poll +17 common _llseek sys_llseek +18 common epoll_wait sys_epoll_wait +19 common epoll_ctl sys_epoll_ctl +20 common epoll_create sys_epoll_create +21 common creat sys_creat +22 common truncate sys_truncate +23 common ftruncate sys_ftruncate +24 common readv sys_readv +25 common writev sys_writev +26 common fsync sys_fsync +27 common fdatasync sys_fdatasync +28 common truncate64 sys_truncate64 +29 common ftruncate64 sys_ftruncate64 +30 common pread64 sys_pread64 +31 common pwrite64 sys_pwrite64 +32 common link sys_link +33 common rename sys_rename +34 common symlink sys_symlink +35 common readlink sys_readlink +36 common mknod sys_mknod +37 common pipe sys_pipe +38 common unlink sys_unlink +39 common rmdir sys_rmdir +40 common mkdir sys_mkdir +41 common chdir sys_chdir +42 common fchdir sys_fchdir +43 common getcwd sys_getcwd +44 common chmod sys_chmod +45 common chown sys_chown +46 common stat sys_newstat +47 common stat64 sys_stat64 +48 common lchown sys_lchown +49 common lstat sys_newlstat +50 common lstat64 sys_lstat64 +51 common available51 sys_ni_syscall +52 common fchmod sys_fchmod +53 common fchown sys_fchown +54 common fstat sys_newfstat +55 common fstat64 sys_fstat64 +56 common flock sys_flock +57 common access sys_access +58 common umask sys_umask +59 common getdents sys_getdents +60 common getdents64 sys_getdents64 +61 common fcntl64 sys_fcntl64 +62 common fallocate sys_fallocate +63 common fadvise64_64 xtensa_fadvise64_64 +64 common utime sys_utime +65 common utimes sys_utimes +66 common ioctl sys_ioctl +67 common fcntl sys_fcntl +68 common setxattr sys_setxattr +69 common getxattr sys_getxattr +70 common listxattr sys_listxattr +71 common removexattr sys_removexattr +72 common lsetxattr sys_lsetxattr +73 common lgetxattr sys_lgetxattr +74 common llistxattr sys_llistxattr +75 common lremovexattr sys_lremovexattr +76 common fsetxattr sys_fsetxattr +77 common fgetxattr sys_fgetxattr +78 common flistxattr sys_flistxattr +79 common fremovexattr sys_fremovexattr +# File Map / Shared Memory Operations +80 common mmap2 sys_mmap_pgoff +81 common munmap sys_munmap +82 common mprotect sys_mprotect +83 common brk sys_brk +84 common mlock sys_mlock +85 common munlock sys_munlock +86 common mlockall sys_mlockall +87 common munlockall sys_munlockall +88 common mremap sys_mremap +89 common msync sys_msync +90 common mincore sys_mincore +91 common madvise sys_madvise +92 common shmget sys_shmget +93 common shmat xtensa_shmat +94 common shmctl sys_shmctl +95 common shmdt sys_shmdt +# Socket Operations +96 common socket sys_socket +97 common setsockopt sys_setsockopt +98 common getsockopt sys_getsockopt +99 common shutdown sys_shutdown +100 common bind sys_bind +101 common connect sys_connect +102 common listen sys_listen +103 common accept sys_accept +104 common getsockname sys_getsockname +105 common getpeername sys_getpeername +106 common sendmsg sys_sendmsg +107 common recvmsg sys_recvmsg +108 common send sys_send +109 common recv sys_recv +110 common sendto sys_sendto +111 common recvfrom sys_recvfrom +112 common socketpair sys_socketpair +113 common sendfile sys_sendfile +114 common sendfile64 sys_sendfile64 +115 common sendmmsg sys_sendmmsg +# Process Operations +116 common clone sys_clone +117 common execve sys_execve +118 common exit sys_exit +119 common exit_group sys_exit_group +120 common getpid sys_getpid +121 common wait4 sys_wait4 +122 common waitid sys_waitid +123 common kill sys_kill +124 common tkill sys_tkill +125 common tgkill sys_tgkill +126 common set_tid_address sys_set_tid_address +127 common gettid sys_gettid +128 common setsid sys_setsid +129 common getsid sys_getsid +130 common prctl sys_prctl +131 common personality sys_personality +132 common getpriority sys_getpriority +133 common setpriority sys_setpriority +134 common setitimer sys_setitimer +135 common getitimer sys_getitimer +136 common setuid sys_setuid +137 common getuid sys_getuid +138 common setgid sys_setgid +139 common getgid sys_getgid +140 common geteuid sys_geteuid +141 common getegid sys_getegid +142 common setreuid sys_setreuid +143 common setregid sys_setregid +144 common setresuid sys_setresuid +145 common getresuid sys_getresuid +146 common setresgid sys_setresgid +147 common getresgid sys_getresgid +148 common setpgid sys_setpgid +149 common getpgid sys_getpgid +150 common getppid sys_getppid +151 common getpgrp sys_getpgrp +# 152 was set_thread_area +152 common reserved152 sys_ni_syscall +# 153 was get_thread_area +153 common reserved153 sys_ni_syscall +154 common times sys_times +155 common acct sys_acct +156 common sched_setaffinity sys_sched_setaffinity +157 common sched_getaffinity sys_sched_getaffinity +158 common capget sys_capget +159 common capset sys_capset +160 common ptrace sys_ptrace +161 common semtimedop sys_semtimedop +162 common semget sys_semget +163 common semop sys_semop +164 common semctl sys_semctl +165 common available165 sys_ni_syscall +166 common msgget sys_msgget +167 common msgsnd sys_msgsnd +168 common msgrcv sys_msgrcv +169 common msgctl sys_msgctl +170 common available170 sys_ni_syscall +# File System +171 common umount2 sys_umount +172 common mount sys_mount +173 common swapon sys_swapon +174 common chroot sys_chroot +175 common pivot_root sys_pivot_root +176 common umount sys_oldumount +177 common swapoff sys_swapoff +178 common sync sys_sync +179 common syncfs sys_syncfs +180 common setfsuid sys_setfsuid +181 common setfsgid sys_setfsgid +182 common sysfs sys_sysfs +183 common ustat sys_ustat +184 common statfs sys_statfs +185 common fstatfs sys_fstatfs +186 common statfs64 sys_statfs64 +187 common fstatfs64 sys_fstatfs64 +# System +188 common setrlimit sys_setrlimit +189 common getrlimit sys_getrlimit +190 common getrusage sys_getrusage +191 common futex sys_futex +192 common gettimeofday sys_gettimeofday +193 common settimeofday sys_settimeofday +194 common adjtimex sys_adjtimex +195 common nanosleep sys_nanosleep +196 common getgroups sys_getgroups +197 common setgroups sys_setgroups +198 common sethostname sys_sethostname +199 common setdomainname sys_setdomainname +200 common syslog sys_syslog +201 common vhangup sys_vhangup +202 common uselib sys_uselib +203 common reboot sys_reboot +204 common quotactl sys_quotactl +# 205 was old nfsservctl +205 common nfsservctl sys_ni_syscall +206 common _sysctl sys_sysctl +207 common bdflush sys_bdflush +208 common uname sys_newuname +209 common sysinfo sys_sysinfo +210 common init_module sys_init_module +211 common delete_module sys_delete_module +212 common sched_setparam sys_sched_setparam +213 common sched_getparam sys_sched_getparam +214 common sched_setscheduler sys_sched_setscheduler +215 common sched_getscheduler sys_sched_getscheduler +216 common sched_get_priority_max sys_sched_get_priority_max +217 common sched_get_priority_min sys_sched_get_priority_min +218 common sched_rr_get_interval sys_sched_rr_get_interval +219 common sched_yield sys_sched_yield +222 common available222 sys_ni_syscall +# Signal Handling +223 common restart_syscall sys_restart_syscall +224 common sigaltstack sys_sigaltstack +225 common rt_sigreturn xtensa_rt_sigreturn +226 common rt_sigaction sys_rt_sigaction +227 common rt_sigprocmask sys_rt_sigprocmask +228 common rt_sigpending sys_rt_sigpending +229 common rt_sigtimedwait sys_rt_sigtimedwait +230 common rt_sigqueueinfo sys_rt_sigqueueinfo +231 common rt_sigsuspend sys_rt_sigsuspend +# Message +232 common mq_open sys_mq_open +233 common mq_unlink sys_mq_unlink +234 common mq_timedsend sys_mq_timedsend +235 common mq_timedreceive sys_mq_timedreceive +236 common mq_notify sys_mq_notify +237 common mq_getsetattr sys_mq_getsetattr +238 common available238 sys_ni_syscall +239 common io_setup sys_io_setup +# IO +240 common io_destroy sys_io_destroy +241 common io_submit sys_io_submit +242 common io_getevents sys_io_getevents +243 common io_cancel sys_io_cancel +244 common clock_settime sys_clock_settime +245 common clock_gettime sys_clock_gettime +246 common clock_getres sys_clock_getres +247 common clock_nanosleep sys_clock_nanosleep +# Timer +248 common timer_create sys_timer_create +249 common timer_delete sys_timer_delete +250 common timer_settime sys_timer_settime +251 common timer_gettime sys_timer_gettime +252 common timer_getoverrun sys_timer_getoverrun +# System +253 common reserved253 sys_ni_syscall +254 common lookup_dcookie sys_lookup_dcookie +255 common available255 sys_ni_syscall +256 common add_key sys_add_key +257 common request_key sys_request_key +258 common keyctl sys_keyctl +259 common available259 sys_ni_syscall +260 common readahead sys_readahead +261 common remap_file_pages sys_remap_file_pages +262 common migrate_pages sys_migrate_pages +263 common mbind sys_mbind +264 common get_mempolicy sys_get_mempolicy +265 common set_mempolicy sys_set_mempolicy +266 common unshare sys_unshare +267 common move_pages sys_move_pages +268 common splice sys_splice +269 common tee sys_tee +270 common vmsplice sys_vmsplice +271 common available271 sys_ni_syscall +272 common pselect6 sys_pselect6 +273 common ppoll sys_ppoll +274 common epoll_pwait sys_epoll_pwait +275 common epoll_create1 sys_epoll_create1 +276 common inotify_init sys_inotify_init +277 common inotify_add_watch sys_inotify_add_watch +278 common inotify_rm_watch sys_inotify_rm_watch +279 common inotify_init1 sys_inotify_init1 +280 common getcpu sys_getcpu +281 common kexec_load sys_ni_syscall +282 common ioprio_set sys_ioprio_set +283 common ioprio_get sys_ioprio_get +284 common set_robust_list sys_set_robust_list +285 common get_robust_list sys_get_robust_list +286 common available286 sys_ni_syscall +287 common available287 sys_ni_syscall +# Relative File Operations +288 common openat sys_openat +289 common mkdirat sys_mkdirat +290 common mknodat sys_mknodat +291 common unlinkat sys_unlinkat +292 common renameat sys_renameat +293 common linkat sys_linkat +294 common symlinkat sys_symlinkat +295 common readlinkat sys_readlinkat +296 common utimensat sys_utimensat +297 common fchownat sys_fchownat +298 common futimesat sys_futimesat +299 common fstatat64 sys_fstatat64 +300 common fchmodat sys_fchmodat +301 common faccessat sys_faccessat +302 common available302 sys_ni_syscall +303 common available303 sys_ni_syscall +304 common signalfd sys_signalfd +# 305 was timerfd +306 common eventfd sys_eventfd +307 common recvmmsg sys_recvmmsg +308 common setns sys_setns +309 common signalfd4 sys_signalfd4 +310 common dup3 sys_dup3 +311 common pipe2 sys_pipe2 +312 common timerfd_create sys_timerfd_create +313 common timerfd_settime sys_timerfd_settime +314 common timerfd_gettime sys_timerfd_gettime +315 common available315 sys_ni_syscall +316 common eventfd2 sys_eventfd2 +317 common preadv sys_preadv +318 common pwritev sys_pwritev +319 common available319 sys_ni_syscall +320 common fanotify_init sys_fanotify_init +321 common fanotify_mark sys_fanotify_mark +322 common process_vm_readv sys_process_vm_readv +323 common process_vm_writev sys_process_vm_writev +324 common name_to_handle_at sys_name_to_handle_at +325 common open_by_handle_at sys_open_by_handle_at +326 common sync_file_range2 sys_sync_file_range2 +327 common perf_event_open sys_perf_event_open +328 common rt_tgsigqueueinfo sys_rt_tgsigqueueinfo +329 common clock_adjtime sys_clock_adjtime +330 common prlimit64 sys_prlimit64 +331 common kcmp sys_kcmp +332 common finit_module sys_finit_module +333 common accept4 sys_accept4 +334 common sched_setattr sys_sched_setattr +335 common sched_getattr sys_sched_getattr +336 common renameat2 sys_renameat2 +337 common seccomp sys_seccomp +338 common getrandom sys_getrandom +339 common memfd_create sys_memfd_create +340 common bpf sys_bpf +341 common execveat sys_execveat +342 common userfaultfd sys_userfaultfd +343 common membarrier sys_membarrier +344 common mlock2 sys_mlock2 +345 common copy_file_range sys_copy_file_range +346 common preadv2 sys_preadv2 +347 common pwritev2 sys_pwritev2 +348 common pkey_mprotect sys_pkey_mprotect +349 common pkey_alloc sys_pkey_alloc +350 common pkey_free sys_pkey_free +351 common statx sys_statx diff --git a/arch/xtensa/kernel/syscalls/syscallhdr.sh b/arch/xtensa/kernel/syscalls/syscallhdr.sh new file mode 100644 index 000000000000..d37db641ca31 --- /dev/null +++ b/arch/xtensa/kernel/syscalls/syscallhdr.sh @@ -0,0 +1,36 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 + +in="$1" +out="$2" +my_abis=`echo "($3)" | tr ',' '|'` +prefix="$4" +offset="$5" + +fileguard=_UAPI_ASM_XTENSA_`basename "$out" | sed \ + -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/' \ + -e 's/[^A-Z0-9_]/_/g' -e 's/__/_/g'` +grep -E "^[0-9A-Fa-fXx]+[[:space:]]+${my_abis}" "$in" | sort -n | ( + printf "#ifndef %s\n" "${fileguard}" + printf "#define %s\n" "${fileguard}" + printf "\n" + + nxt=0 + while read nr abi name entry ; do + if [ -z "$offset" ]; then + printf "#define __NR_%s%s\t%s\n" \ + "${prefix}" "${name}" "${nr}" + else + printf "#define __NR_%s%s\t(%s + %s)\n" \ + "${prefix}" "${name}" "${offset}" "${nr}" + fi + nxt=$((nr+1)) + done + + printf "\n" + printf "#ifdef __KERNEL__\n" + printf "#define __NR_syscalls\t%s\n" "${nxt}" + printf "#endif\n" + printf "\n" + printf "#endif /* %s */" "${fileguard}" +) > "$out" diff --git a/arch/xtensa/kernel/syscalls/syscalltbl.sh b/arch/xtensa/kernel/syscalls/syscalltbl.sh new file mode 100644 index 000000000000..85d78d9309ad --- /dev/null +++ b/arch/xtensa/kernel/syscalls/syscalltbl.sh @@ -0,0 +1,32 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 + +in="$1" +out="$2" +my_abis=`echo "($3)" | tr ',' '|'` +my_abi="$4" +offset="$5" + +emit() { + t_nxt="$1" + t_nr="$2" + t_entry="$3" + + while [ $t_nxt -lt $t_nr ]; do + printf "__SYSCALL(%s, sys_ni_syscall, )\n" "${t_nxt}" + t_nxt=$((t_nxt+1)) + done + printf "__SYSCALL(%s, %s, )\n" "${t_nxt}" "${t_entry}" +} + +grep -E "^[0-9A-Fa-fXx]+[[:space:]]+${my_abis}" "$in" | sort -n | ( + nxt=0 + if [ -z "$offset" ]; then + offset=0 + fi + + while read nr abi name entry ; do + emit $((nxt+offset)) $((nr+offset)) $entry + nxt=$((nr+1)) + done +) > "$out" From 5eacadb5e66b2b100695777ee7d68d8a2d9bd25c Mon Sep 17 00:00:00 2001 From: Firoz Khan Date: Tue, 13 Nov 2018 15:49:30 +0530 Subject: [PATCH 03/25] xtensa: generate uapi header and syscall table header files System call table generation script must be run to gener- ate unistd_32.h and syscall_table.h files. This patch will have changes which will invokes the script. This patch will generate unistd_32.h and syscall_table.h files by the syscall table generation script invoked by xtensa/Makefile and the generated files against the removed files must be identical. The generated uapi header file will be included in uapi/- asm/unistd.h and generated system call table header file will be included by kernel/syscall.c file. Signed-off-by: Firoz Khan Signed-off-by: Max Filippov --- arch/xtensa/Makefile | 3 + arch/xtensa/include/asm/Kbuild | 1 + arch/xtensa/include/uapi/asm/Kbuild | 1 + arch/xtensa/include/uapi/asm/unistd.h | 783 +------------------------- arch/xtensa/kernel/syscall.c | 5 +- 5 files changed, 10 insertions(+), 783 deletions(-) diff --git a/arch/xtensa/Makefile b/arch/xtensa/Makefile index be060dfb1cc3..1542018c9e57 100644 --- a/arch/xtensa/Makefile +++ b/arch/xtensa/Makefile @@ -90,6 +90,9 @@ boot := arch/xtensa/boot all Image zImage uImage: vmlinux $(Q)$(MAKE) $(build)=$(boot) $@ +archheaders: + $(Q)$(MAKE) $(build)=arch/xtensa/kernel/syscalls all + define archhelp @echo '* Image - Kernel ELF image with reset vector' @echo '* zImage - Compressed kernel image (arch/xtensa/boot/images/zImage.*)' diff --git a/arch/xtensa/include/asm/Kbuild b/arch/xtensa/include/asm/Kbuild index 3310adecafb0..e255683cd520 100644 --- a/arch/xtensa/include/asm/Kbuild +++ b/arch/xtensa/include/asm/Kbuild @@ -1,3 +1,4 @@ +generated-y += syscall_table.h generic-y += bug.h generic-y += compat.h generic-y += device.h diff --git a/arch/xtensa/include/uapi/asm/Kbuild b/arch/xtensa/include/uapi/asm/Kbuild index 837d4dd76785..f95cad300369 100644 --- a/arch/xtensa/include/uapi/asm/Kbuild +++ b/arch/xtensa/include/uapi/asm/Kbuild @@ -1,6 +1,7 @@ # UAPI Header export list include include/uapi/asm-generic/Kbuild.asm +generated-y += unistd_32.h generic-y += bitsperlong.h generic-y += bpf_perf_event.h generic-y += errno.h diff --git a/arch/xtensa/include/uapi/asm/unistd.h b/arch/xtensa/include/uapi/asm/unistd.h index 332d67a6f76c..e67ccdd117d8 100644 --- a/arch/xtensa/include/uapi/asm/unistd.h +++ b/arch/xtensa/include/uapi/asm/unistd.h @@ -1,786 +1,10 @@ /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ -#if !defined(_UAPI_XTENSA_UNISTD_H) || defined(__SYSCALL) +#ifndef _UAPI_XTENSA_UNISTD_H #define _UAPI_XTENSA_UNISTD_H -#ifndef __SYSCALL -# define __SYSCALL(nr,func,nargs) -#endif +#include -#define __NR_spill 0 -__SYSCALL( 0, sys_ni_syscall, 0) -#define __NR_xtensa 1 -__SYSCALL( 1, sys_ni_syscall, 0) -#define __NR_available4 2 -__SYSCALL( 2, sys_ni_syscall, 0) -#define __NR_available5 3 -__SYSCALL( 3, sys_ni_syscall, 0) -#define __NR_available6 4 -__SYSCALL( 4, sys_ni_syscall, 0) -#define __NR_available7 5 -__SYSCALL( 5, sys_ni_syscall, 0) -#define __NR_available8 6 -__SYSCALL( 6, sys_ni_syscall, 0) -#define __NR_available9 7 -__SYSCALL( 7, sys_ni_syscall, 0) - -/* File Operations */ - -#define __NR_open 8 -__SYSCALL( 8, sys_open, 3) -#define __NR_close 9 -__SYSCALL( 9, sys_close, 1) -#define __NR_dup 10 -__SYSCALL( 10, sys_dup, 1) -#define __NR_dup2 11 -__SYSCALL( 11, sys_dup2, 2) -#define __NR_read 12 -__SYSCALL( 12, sys_read, 3) -#define __NR_write 13 -__SYSCALL( 13, sys_write, 3) -#define __NR_select 14 -__SYSCALL( 14, sys_select, 5) -#define __NR_lseek 15 -__SYSCALL( 15, sys_lseek, 3) -#define __NR_poll 16 -__SYSCALL( 16, sys_poll, 3) -#define __NR__llseek 17 -__SYSCALL( 17, sys_llseek, 5) -#define __NR_epoll_wait 18 -__SYSCALL( 18, sys_epoll_wait, 4) -#define __NR_epoll_ctl 19 -__SYSCALL( 19, sys_epoll_ctl, 4) -#define __NR_epoll_create 20 -__SYSCALL( 20, sys_epoll_create, 1) -#define __NR_creat 21 -__SYSCALL( 21, sys_creat, 2) -#define __NR_truncate 22 -__SYSCALL( 22, sys_truncate, 2) -#define __NR_ftruncate 23 -__SYSCALL( 23, sys_ftruncate, 2) -#define __NR_readv 24 -__SYSCALL( 24, sys_readv, 3) -#define __NR_writev 25 -__SYSCALL( 25, sys_writev, 3) -#define __NR_fsync 26 -__SYSCALL( 26, sys_fsync, 1) -#define __NR_fdatasync 27 -__SYSCALL( 27, sys_fdatasync, 1) -#define __NR_truncate64 28 -__SYSCALL( 28, sys_truncate64, 2) -#define __NR_ftruncate64 29 -__SYSCALL( 29, sys_ftruncate64, 2) -#define __NR_pread64 30 -__SYSCALL( 30, sys_pread64, 6) -#define __NR_pwrite64 31 -__SYSCALL( 31, sys_pwrite64, 6) - -#define __NR_link 32 -__SYSCALL( 32, sys_link, 2) -#define __NR_rename 33 -__SYSCALL( 33, sys_rename, 2) -#define __NR_symlink 34 -__SYSCALL( 34, sys_symlink, 2) -#define __NR_readlink 35 -__SYSCALL( 35, sys_readlink, 3) -#define __NR_mknod 36 -__SYSCALL( 36, sys_mknod, 3) -#define __NR_pipe 37 -__SYSCALL( 37, sys_pipe, 1) -#define __NR_unlink 38 -__SYSCALL( 38, sys_unlink, 1) -#define __NR_rmdir 39 -__SYSCALL( 39, sys_rmdir, 1) - -#define __NR_mkdir 40 -__SYSCALL( 40, sys_mkdir, 2) -#define __NR_chdir 41 -__SYSCALL( 41, sys_chdir, 1) -#define __NR_fchdir 42 -__SYSCALL( 42, sys_fchdir, 1) -#define __NR_getcwd 43 -__SYSCALL( 43, sys_getcwd, 2) - -#define __NR_chmod 44 -__SYSCALL( 44, sys_chmod, 2) -#define __NR_chown 45 -__SYSCALL( 45, sys_chown, 3) -#define __NR_stat 46 -__SYSCALL( 46, sys_newstat, 2) -#define __NR_stat64 47 -__SYSCALL( 47, sys_stat64, 2) - -#define __NR_lchown 48 -__SYSCALL( 48, sys_lchown, 3) -#define __NR_lstat 49 -__SYSCALL( 49, sys_newlstat, 2) -#define __NR_lstat64 50 -__SYSCALL( 50, sys_lstat64, 2) -#define __NR_available51 51 -__SYSCALL( 51, sys_ni_syscall, 0) - -#define __NR_fchmod 52 -__SYSCALL( 52, sys_fchmod, 2) -#define __NR_fchown 53 -__SYSCALL( 53, sys_fchown, 3) -#define __NR_fstat 54 -__SYSCALL( 54, sys_newfstat, 2) -#define __NR_fstat64 55 -__SYSCALL( 55, sys_fstat64, 2) - -#define __NR_flock 56 -__SYSCALL( 56, sys_flock, 2) -#define __NR_access 57 -__SYSCALL( 57, sys_access, 2) -#define __NR_umask 58 -__SYSCALL( 58, sys_umask, 1) -#define __NR_getdents 59 -__SYSCALL( 59, sys_getdents, 3) -#define __NR_getdents64 60 -__SYSCALL( 60, sys_getdents64, 3) -#define __NR_fcntl64 61 -__SYSCALL( 61, sys_fcntl64, 3) -#define __NR_fallocate 62 -__SYSCALL( 62, sys_fallocate, 6) -#define __NR_fadvise64_64 63 -__SYSCALL( 63, xtensa_fadvise64_64, 6) -#define __NR_utime 64 /* glibc 2.3.3 ?? */ -__SYSCALL( 64, sys_utime, 2) -#define __NR_utimes 65 -__SYSCALL( 65, sys_utimes, 2) -#define __NR_ioctl 66 -__SYSCALL( 66, sys_ioctl, 3) -#define __NR_fcntl 67 -__SYSCALL( 67, sys_fcntl, 3) - -#define __NR_setxattr 68 -__SYSCALL( 68, sys_setxattr, 5) -#define __NR_getxattr 69 -__SYSCALL( 69, sys_getxattr, 4) -#define __NR_listxattr 70 -__SYSCALL( 70, sys_listxattr, 3) -#define __NR_removexattr 71 -__SYSCALL( 71, sys_removexattr, 2) -#define __NR_lsetxattr 72 -__SYSCALL( 72, sys_lsetxattr, 5) -#define __NR_lgetxattr 73 -__SYSCALL( 73, sys_lgetxattr, 4) -#define __NR_llistxattr 74 -__SYSCALL( 74, sys_llistxattr, 3) -#define __NR_lremovexattr 75 -__SYSCALL( 75, sys_lremovexattr, 2) -#define __NR_fsetxattr 76 -__SYSCALL( 76, sys_fsetxattr, 5) -#define __NR_fgetxattr 77 -__SYSCALL( 77, sys_fgetxattr, 4) -#define __NR_flistxattr 78 -__SYSCALL( 78, sys_flistxattr, 3) -#define __NR_fremovexattr 79 -__SYSCALL( 79, sys_fremovexattr, 2) - -/* File Map / Shared Memory Operations */ - -#define __NR_mmap2 80 -__SYSCALL( 80, sys_mmap_pgoff, 6) -#define __NR_munmap 81 -__SYSCALL( 81, sys_munmap, 2) -#define __NR_mprotect 82 -__SYSCALL( 82, sys_mprotect, 3) -#define __NR_brk 83 -__SYSCALL( 83, sys_brk, 1) -#define __NR_mlock 84 -__SYSCALL( 84, sys_mlock, 2) -#define __NR_munlock 85 -__SYSCALL( 85, sys_munlock, 2) -#define __NR_mlockall 86 -__SYSCALL( 86, sys_mlockall, 1) -#define __NR_munlockall 87 -__SYSCALL( 87, sys_munlockall, 0) -#define __NR_mremap 88 -__SYSCALL( 88, sys_mremap, 4) -#define __NR_msync 89 -__SYSCALL( 89, sys_msync, 3) -#define __NR_mincore 90 -__SYSCALL( 90, sys_mincore, 3) -#define __NR_madvise 91 -__SYSCALL( 91, sys_madvise, 3) -#define __NR_shmget 92 -__SYSCALL( 92, sys_shmget, 4) -#define __NR_shmat 93 -__SYSCALL( 93, xtensa_shmat, 4) -#define __NR_shmctl 94 -__SYSCALL( 94, sys_shmctl, 4) -#define __NR_shmdt 95 -__SYSCALL( 95, sys_shmdt, 4) - -/* Socket Operations */ - -#define __NR_socket 96 -__SYSCALL( 96, sys_socket, 3) -#define __NR_setsockopt 97 -__SYSCALL( 97, sys_setsockopt, 5) -#define __NR_getsockopt 98 -__SYSCALL( 98, sys_getsockopt, 5) -#define __NR_shutdown 99 -__SYSCALL( 99, sys_shutdown, 2) - -#define __NR_bind 100 -__SYSCALL(100, sys_bind, 3) -#define __NR_connect 101 -__SYSCALL(101, sys_connect, 3) -#define __NR_listen 102 -__SYSCALL(102, sys_listen, 2) -#define __NR_accept 103 -__SYSCALL(103, sys_accept, 3) - -#define __NR_getsockname 104 -__SYSCALL(104, sys_getsockname, 3) -#define __NR_getpeername 105 -__SYSCALL(105, sys_getpeername, 3) -#define __NR_sendmsg 106 -__SYSCALL(106, sys_sendmsg, 3) -#define __NR_recvmsg 107 -__SYSCALL(107, sys_recvmsg, 3) -#define __NR_send 108 -__SYSCALL(108, sys_send, 4) -#define __NR_recv 109 -__SYSCALL(109, sys_recv, 4) -#define __NR_sendto 110 -__SYSCALL(110, sys_sendto, 6) -#define __NR_recvfrom 111 -__SYSCALL(111, sys_recvfrom, 6) - -#define __NR_socketpair 112 -__SYSCALL(112, sys_socketpair, 4) -#define __NR_sendfile 113 -__SYSCALL(113, sys_sendfile, 4) -#define __NR_sendfile64 114 -__SYSCALL(114, sys_sendfile64, 4) -#define __NR_sendmmsg 115 -__SYSCALL(115, sys_sendmmsg, 4) - -/* Process Operations */ - -#define __NR_clone 116 -__SYSCALL(116, sys_clone, 5) -#define __NR_execve 117 -__SYSCALL(117, sys_execve, 3) -#define __NR_exit 118 -__SYSCALL(118, sys_exit, 1) -#define __NR_exit_group 119 -__SYSCALL(119, sys_exit_group, 1) -#define __NR_getpid 120 -__SYSCALL(120, sys_getpid, 0) -#define __NR_wait4 121 -__SYSCALL(121, sys_wait4, 4) -#define __NR_waitid 122 -__SYSCALL(122, sys_waitid, 5) -#define __NR_kill 123 -__SYSCALL(123, sys_kill, 2) -#define __NR_tkill 124 -__SYSCALL(124, sys_tkill, 2) -#define __NR_tgkill 125 -__SYSCALL(125, sys_tgkill, 3) -#define __NR_set_tid_address 126 -__SYSCALL(126, sys_set_tid_address, 1) -#define __NR_gettid 127 -__SYSCALL(127, sys_gettid, 0) -#define __NR_setsid 128 -__SYSCALL(128, sys_setsid, 0) -#define __NR_getsid 129 -__SYSCALL(129, sys_getsid, 1) -#define __NR_prctl 130 -__SYSCALL(130, sys_prctl, 5) -#define __NR_personality 131 -__SYSCALL(131, sys_personality, 1) -#define __NR_getpriority 132 -__SYSCALL(132, sys_getpriority, 2) -#define __NR_setpriority 133 -__SYSCALL(133, sys_setpriority, 3) -#define __NR_setitimer 134 -__SYSCALL(134, sys_setitimer, 3) -#define __NR_getitimer 135 -__SYSCALL(135, sys_getitimer, 2) -#define __NR_setuid 136 -__SYSCALL(136, sys_setuid, 1) -#define __NR_getuid 137 -__SYSCALL(137, sys_getuid, 0) -#define __NR_setgid 138 -__SYSCALL(138, sys_setgid, 1) -#define __NR_getgid 139 -__SYSCALL(139, sys_getgid, 0) -#define __NR_geteuid 140 -__SYSCALL(140, sys_geteuid, 0) -#define __NR_getegid 141 -__SYSCALL(141, sys_getegid, 0) -#define __NR_setreuid 142 -__SYSCALL(142, sys_setreuid, 2) -#define __NR_setregid 143 -__SYSCALL(143, sys_setregid, 2) -#define __NR_setresuid 144 -__SYSCALL(144, sys_setresuid, 3) -#define __NR_getresuid 145 -__SYSCALL(145, sys_getresuid, 3) -#define __NR_setresgid 146 -__SYSCALL(146, sys_setresgid, 3) -#define __NR_getresgid 147 -__SYSCALL(147, sys_getresgid, 3) -#define __NR_setpgid 148 -__SYSCALL(148, sys_setpgid, 2) -#define __NR_getpgid 149 -__SYSCALL(149, sys_getpgid, 1) -#define __NR_getppid 150 -__SYSCALL(150, sys_getppid, 0) -#define __NR_getpgrp 151 -__SYSCALL(151, sys_getpgrp, 0) - -#define __NR_reserved152 152 /* set_thread_area */ -__SYSCALL(152, sys_ni_syscall, 0) -#define __NR_reserved153 153 /* get_thread_area */ -__SYSCALL(153, sys_ni_syscall, 0) -#define __NR_times 154 -__SYSCALL(154, sys_times, 1) -#define __NR_acct 155 -__SYSCALL(155, sys_acct, 1) -#define __NR_sched_setaffinity 156 -__SYSCALL(156, sys_sched_setaffinity, 3) -#define __NR_sched_getaffinity 157 -__SYSCALL(157, sys_sched_getaffinity, 3) -#define __NR_capget 158 -__SYSCALL(158, sys_capget, 2) -#define __NR_capset 159 -__SYSCALL(159, sys_capset, 2) -#define __NR_ptrace 160 -__SYSCALL(160, sys_ptrace, 4) -#define __NR_semtimedop 161 -__SYSCALL(161, sys_semtimedop, 5) -#define __NR_semget 162 -__SYSCALL(162, sys_semget, 4) -#define __NR_semop 163 -__SYSCALL(163, sys_semop, 4) -#define __NR_semctl 164 -__SYSCALL(164, sys_semctl, 4) -#define __NR_available165 165 -__SYSCALL(165, sys_ni_syscall, 0) -#define __NR_msgget 166 -__SYSCALL(166, sys_msgget, 4) -#define __NR_msgsnd 167 -__SYSCALL(167, sys_msgsnd, 4) -#define __NR_msgrcv 168 -__SYSCALL(168, sys_msgrcv, 4) -#define __NR_msgctl 169 -__SYSCALL(169, sys_msgctl, 4) -#define __NR_available170 170 -__SYSCALL(170, sys_ni_syscall, 0) - -/* File System */ - -#define __NR_umount2 171 -__SYSCALL(171, sys_umount, 2) -#define __NR_mount 172 -__SYSCALL(172, sys_mount, 5) -#define __NR_swapon 173 -__SYSCALL(173, sys_swapon, 2) -#define __NR_chroot 174 -__SYSCALL(174, sys_chroot, 1) -#define __NR_pivot_root 175 -__SYSCALL(175, sys_pivot_root, 2) -#define __NR_umount 176 -__SYSCALL(176, sys_oldumount, 1) #define __ARCH_WANT_SYS_OLDUMOUNT -#define __NR_swapoff 177 -__SYSCALL(177, sys_swapoff, 1) -#define __NR_sync 178 -__SYSCALL(178, sys_sync, 0) -#define __NR_syncfs 179 -__SYSCALL(179, sys_syncfs, 1) -#define __NR_setfsuid 180 -__SYSCALL(180, sys_setfsuid, 1) -#define __NR_setfsgid 181 -__SYSCALL(181, sys_setfsgid, 1) -#define __NR_sysfs 182 -__SYSCALL(182, sys_sysfs, 3) -#define __NR_ustat 183 -__SYSCALL(183, sys_ustat, 2) -#define __NR_statfs 184 -__SYSCALL(184, sys_statfs, 2) -#define __NR_fstatfs 185 -__SYSCALL(185, sys_fstatfs, 2) -#define __NR_statfs64 186 -__SYSCALL(186, sys_statfs64, 3) -#define __NR_fstatfs64 187 -__SYSCALL(187, sys_fstatfs64, 3) - -/* System */ - -#define __NR_setrlimit 188 -__SYSCALL(188, sys_setrlimit, 2) -#define __NR_getrlimit 189 -__SYSCALL(189, sys_getrlimit, 2) -#define __NR_getrusage 190 -__SYSCALL(190, sys_getrusage, 2) -#define __NR_futex 191 -__SYSCALL(191, sys_futex, 5) -#define __NR_gettimeofday 192 -__SYSCALL(192, sys_gettimeofday, 2) -#define __NR_settimeofday 193 -__SYSCALL(193, sys_settimeofday, 2) -#define __NR_adjtimex 194 -__SYSCALL(194, sys_adjtimex, 1) -#define __NR_nanosleep 195 -__SYSCALL(195, sys_nanosleep, 2) -#define __NR_getgroups 196 -__SYSCALL(196, sys_getgroups, 2) -#define __NR_setgroups 197 -__SYSCALL(197, sys_setgroups, 2) -#define __NR_sethostname 198 -__SYSCALL(198, sys_sethostname, 2) -#define __NR_setdomainname 199 -__SYSCALL(199, sys_setdomainname, 2) -#define __NR_syslog 200 -__SYSCALL(200, sys_syslog, 3) -#define __NR_vhangup 201 -__SYSCALL(201, sys_vhangup, 0) -#define __NR_uselib 202 -__SYSCALL(202, sys_uselib, 1) -#define __NR_reboot 203 -__SYSCALL(203, sys_reboot, 3) -#define __NR_quotactl 204 -__SYSCALL(204, sys_quotactl, 4) -#define __NR_nfsservctl 205 -__SYSCALL(205, sys_ni_syscall, 0) /* old nfsservctl */ -#define __NR__sysctl 206 -__SYSCALL(206, sys_sysctl, 1) -#define __NR_bdflush 207 -__SYSCALL(207, sys_bdflush, 2) -#define __NR_uname 208 -__SYSCALL(208, sys_newuname, 1) -#define __NR_sysinfo 209 -__SYSCALL(209, sys_sysinfo, 1) -#define __NR_init_module 210 -__SYSCALL(210, sys_init_module, 2) -#define __NR_delete_module 211 -__SYSCALL(211, sys_delete_module, 1) - -#define __NR_sched_setparam 212 -__SYSCALL(212, sys_sched_setparam, 2) -#define __NR_sched_getparam 213 -__SYSCALL(213, sys_sched_getparam, 2) -#define __NR_sched_setscheduler 214 -__SYSCALL(214, sys_sched_setscheduler, 3) -#define __NR_sched_getscheduler 215 -__SYSCALL(215, sys_sched_getscheduler, 1) -#define __NR_sched_get_priority_max 216 -__SYSCALL(216, sys_sched_get_priority_max, 1) -#define __NR_sched_get_priority_min 217 -__SYSCALL(217, sys_sched_get_priority_min, 1) -#define __NR_sched_rr_get_interval 218 -__SYSCALL(218, sys_sched_rr_get_interval, 2) -#define __NR_sched_yield 219 -__SYSCALL(219, sys_sched_yield, 0) -#define __NR_available222 222 -__SYSCALL(222, sys_ni_syscall, 0) - -/* Signal Handling */ - -#define __NR_restart_syscall 223 -__SYSCALL(223, sys_restart_syscall, 0) -#define __NR_sigaltstack 224 -__SYSCALL(224, sys_sigaltstack, 2) -#define __NR_rt_sigreturn 225 -__SYSCALL(225, xtensa_rt_sigreturn, 1) -#define __NR_rt_sigaction 226 -__SYSCALL(226, sys_rt_sigaction, 4) -#define __NR_rt_sigprocmask 227 -__SYSCALL(227, sys_rt_sigprocmask, 4) -#define __NR_rt_sigpending 228 -__SYSCALL(228, sys_rt_sigpending, 2) -#define __NR_rt_sigtimedwait 229 -__SYSCALL(229, sys_rt_sigtimedwait, 4) -#define __NR_rt_sigqueueinfo 230 -__SYSCALL(230, sys_rt_sigqueueinfo, 3) -#define __NR_rt_sigsuspend 231 -__SYSCALL(231, sys_rt_sigsuspend, 2) - -/* Message */ - -#define __NR_mq_open 232 -__SYSCALL(232, sys_mq_open, 4) -#define __NR_mq_unlink 233 -__SYSCALL(233, sys_mq_unlink, 1) -#define __NR_mq_timedsend 234 -__SYSCALL(234, sys_mq_timedsend, 5) -#define __NR_mq_timedreceive 235 -__SYSCALL(235, sys_mq_timedreceive, 5) -#define __NR_mq_notify 236 -__SYSCALL(236, sys_mq_notify, 2) -#define __NR_mq_getsetattr 237 -__SYSCALL(237, sys_mq_getsetattr, 3) -#define __NR_available238 238 -__SYSCALL(238, sys_ni_syscall, 0) - -/* IO */ - -#define __NR_io_setup 239 -__SYSCALL(239, sys_io_setup, 2) -#define __NR_io_destroy 240 -__SYSCALL(240, sys_io_destroy, 1) -#define __NR_io_submit 241 -__SYSCALL(241, sys_io_submit, 3) -#define __NR_io_getevents 242 -__SYSCALL(242, sys_io_getevents, 5) -#define __NR_io_cancel 243 -__SYSCALL(243, sys_io_cancel, 3) -#define __NR_clock_settime 244 -__SYSCALL(244, sys_clock_settime, 2) -#define __NR_clock_gettime 245 -__SYSCALL(245, sys_clock_gettime, 2) -#define __NR_clock_getres 246 -__SYSCALL(246, sys_clock_getres, 2) -#define __NR_clock_nanosleep 247 -__SYSCALL(247, sys_clock_nanosleep, 4) - -/* Timer */ - -#define __NR_timer_create 248 -__SYSCALL(248, sys_timer_create, 3) -#define __NR_timer_delete 249 -__SYSCALL(249, sys_timer_delete, 1) -#define __NR_timer_settime 250 -__SYSCALL(250, sys_timer_settime, 4) -#define __NR_timer_gettime 251 -__SYSCALL(251, sys_timer_gettime, 2) -#define __NR_timer_getoverrun 252 -__SYSCALL(252, sys_timer_getoverrun, 1) - -/* System */ - -#define __NR_reserved253 253 -__SYSCALL(253, sys_ni_syscall, 0) -#define __NR_lookup_dcookie 254 -__SYSCALL(254, sys_lookup_dcookie, 4) -#define __NR_available255 255 -__SYSCALL(255, sys_ni_syscall, 0) -#define __NR_add_key 256 -__SYSCALL(256, sys_add_key, 5) -#define __NR_request_key 257 -__SYSCALL(257, sys_request_key, 5) -#define __NR_keyctl 258 -__SYSCALL(258, sys_keyctl, 5) -#define __NR_available259 259 -__SYSCALL(259, sys_ni_syscall, 0) - - -#define __NR_readahead 260 -__SYSCALL(260, sys_readahead, 5) -#define __NR_remap_file_pages 261 -__SYSCALL(261, sys_remap_file_pages, 5) -#define __NR_migrate_pages 262 -__SYSCALL(262, sys_migrate_pages, 0) -#define __NR_mbind 263 -__SYSCALL(263, sys_mbind, 6) -#define __NR_get_mempolicy 264 -__SYSCALL(264, sys_get_mempolicy, 5) -#define __NR_set_mempolicy 265 -__SYSCALL(265, sys_set_mempolicy, 3) -#define __NR_unshare 266 -__SYSCALL(266, sys_unshare, 1) -#define __NR_move_pages 267 -__SYSCALL(267, sys_move_pages, 0) -#define __NR_splice 268 -__SYSCALL(268, sys_splice, 0) -#define __NR_tee 269 -__SYSCALL(269, sys_tee, 0) -#define __NR_vmsplice 270 -__SYSCALL(270, sys_vmsplice, 0) -#define __NR_available271 271 -__SYSCALL(271, sys_ni_syscall, 0) - -#define __NR_pselect6 272 -__SYSCALL(272, sys_pselect6, 0) -#define __NR_ppoll 273 -__SYSCALL(273, sys_ppoll, 0) -#define __NR_epoll_pwait 274 -__SYSCALL(274, sys_epoll_pwait, 0) -#define __NR_epoll_create1 275 -__SYSCALL(275, sys_epoll_create1, 1) - -#define __NR_inotify_init 276 -__SYSCALL(276, sys_inotify_init, 0) -#define __NR_inotify_add_watch 277 -__SYSCALL(277, sys_inotify_add_watch, 3) -#define __NR_inotify_rm_watch 278 -__SYSCALL(278, sys_inotify_rm_watch, 2) -#define __NR_inotify_init1 279 -__SYSCALL(279, sys_inotify_init1, 1) - -#define __NR_getcpu 280 -__SYSCALL(280, sys_getcpu, 0) -#define __NR_kexec_load 281 -__SYSCALL(281, sys_ni_syscall, 0) - -#define __NR_ioprio_set 282 -__SYSCALL(282, sys_ioprio_set, 2) -#define __NR_ioprio_get 283 -__SYSCALL(283, sys_ioprio_get, 3) - -#define __NR_set_robust_list 284 -__SYSCALL(284, sys_set_robust_list, 3) -#define __NR_get_robust_list 285 -__SYSCALL(285, sys_get_robust_list, 3) -#define __NR_available286 286 -__SYSCALL(286, sys_ni_syscall, 0) -#define __NR_available287 287 -__SYSCALL(287, sys_ni_syscall, 0) - -/* Relative File Operations */ - -#define __NR_openat 288 -__SYSCALL(288, sys_openat, 4) -#define __NR_mkdirat 289 -__SYSCALL(289, sys_mkdirat, 3) -#define __NR_mknodat 290 -__SYSCALL(290, sys_mknodat, 4) -#define __NR_unlinkat 291 -__SYSCALL(291, sys_unlinkat, 3) -#define __NR_renameat 292 -__SYSCALL(292, sys_renameat, 4) -#define __NR_linkat 293 -__SYSCALL(293, sys_linkat, 5) -#define __NR_symlinkat 294 -__SYSCALL(294, sys_symlinkat, 3) -#define __NR_readlinkat 295 -__SYSCALL(295, sys_readlinkat, 4) -#define __NR_utimensat 296 -__SYSCALL(296, sys_utimensat, 0) -#define __NR_fchownat 297 -__SYSCALL(297, sys_fchownat, 5) -#define __NR_futimesat 298 -__SYSCALL(298, sys_futimesat, 4) -#define __NR_fstatat64 299 -__SYSCALL(299, sys_fstatat64, 0) -#define __NR_fchmodat 300 -__SYSCALL(300, sys_fchmodat, 4) -#define __NR_faccessat 301 -__SYSCALL(301, sys_faccessat, 4) -#define __NR_available302 302 -__SYSCALL(302, sys_ni_syscall, 0) -#define __NR_available303 303 -__SYSCALL(303, sys_ni_syscall, 0) - -#define __NR_signalfd 304 -__SYSCALL(304, sys_signalfd, 3) -/* 305 was __NR_timerfd */ -__SYSCALL(305, sys_ni_syscall, 0) -#define __NR_eventfd 306 -__SYSCALL(306, sys_eventfd, 1) -#define __NR_recvmmsg 307 -__SYSCALL(307, sys_recvmmsg, 5) - -#define __NR_setns 308 -__SYSCALL(308, sys_setns, 2) -#define __NR_signalfd4 309 -__SYSCALL(309, sys_signalfd4, 4) -#define __NR_dup3 310 -__SYSCALL(310, sys_dup3, 3) -#define __NR_pipe2 311 -__SYSCALL(311, sys_pipe2, 2) - -#define __NR_timerfd_create 312 -__SYSCALL(312, sys_timerfd_create, 2) -#define __NR_timerfd_settime 313 -__SYSCALL(313, sys_timerfd_settime, 4) -#define __NR_timerfd_gettime 314 -__SYSCALL(314, sys_timerfd_gettime, 2) -#define __NR_available315 315 -__SYSCALL(315, sys_ni_syscall, 0) - -#define __NR_eventfd2 316 -__SYSCALL(316, sys_eventfd2, 2) -#define __NR_preadv 317 -__SYSCALL(317, sys_preadv, 5) -#define __NR_pwritev 318 -__SYSCALL(318, sys_pwritev, 5) -#define __NR_available319 319 -__SYSCALL(319, sys_ni_syscall, 0) - -#define __NR_fanotify_init 320 -__SYSCALL(320, sys_fanotify_init, 2) -#define __NR_fanotify_mark 321 -__SYSCALL(321, sys_fanotify_mark, 6) -#define __NR_process_vm_readv 322 -__SYSCALL(322, sys_process_vm_readv, 6) -#define __NR_process_vm_writev 323 -__SYSCALL(323, sys_process_vm_writev, 6) - -#define __NR_name_to_handle_at 324 -__SYSCALL(324, sys_name_to_handle_at, 5) -#define __NR_open_by_handle_at 325 -__SYSCALL(325, sys_open_by_handle_at, 3) -#define __NR_sync_file_range2 326 -__SYSCALL(326, sys_sync_file_range2, 6) -#define __NR_perf_event_open 327 -__SYSCALL(327, sys_perf_event_open, 5) - -#define __NR_rt_tgsigqueueinfo 328 -__SYSCALL(328, sys_rt_tgsigqueueinfo, 4) -#define __NR_clock_adjtime 329 -__SYSCALL(329, sys_clock_adjtime, 2) -#define __NR_prlimit64 330 -__SYSCALL(330, sys_prlimit64, 4) -#define __NR_kcmp 331 -__SYSCALL(331, sys_kcmp, 5) - -#define __NR_finit_module 332 -__SYSCALL(332, sys_finit_module, 3) - -#define __NR_accept4 333 -__SYSCALL(333, sys_accept4, 4) - -#define __NR_sched_setattr 334 -__SYSCALL(334, sys_sched_setattr, 2) -#define __NR_sched_getattr 335 -__SYSCALL(335, sys_sched_getattr, 3) - -#define __NR_renameat2 336 -__SYSCALL(336, sys_renameat2, 5) - -#define __NR_seccomp 337 -__SYSCALL(337, sys_seccomp, 3) -#define __NR_getrandom 338 -__SYSCALL(338, sys_getrandom, 3) -#define __NR_memfd_create 339 -__SYSCALL(339, sys_memfd_create, 2) -#define __NR_bpf 340 -__SYSCALL(340, sys_bpf, 3) -#define __NR_execveat 341 -__SYSCALL(341, sys_execveat, 5) - -#define __NR_userfaultfd 342 -__SYSCALL(342, sys_userfaultfd, 1) -#define __NR_membarrier 343 -__SYSCALL(343, sys_membarrier, 2) -#define __NR_mlock2 344 -__SYSCALL(344, sys_mlock2, 3) -#define __NR_copy_file_range 345 -__SYSCALL(345, sys_copy_file_range, 6) -#define __NR_preadv2 346 -__SYSCALL(346, sys_preadv2, 6) -#define __NR_pwritev2 347 -__SYSCALL(347, sys_pwritev2, 6) - -#define __NR_pkey_mprotect 348 -__SYSCALL(348, sys_pkey_mprotect, 4) -#define __NR_pkey_alloc 349 -__SYSCALL(349, sys_pkey_alloc, 2) -#define __NR_pkey_free 350 -__SYSCALL(350, sys_pkey_free, 1) - -#define __NR_statx 351 -__SYSCALL(351, sys_statx, 5) - -#ifdef __KERNEL__ -#define __NR_syscalls 352 -#endif /* * sysxtensa syscall handler @@ -797,9 +21,6 @@ __SYSCALL(351, sys_statx, 5) #define SYS_XTENSA_ATOMIC_EXG_ADD 2 /* exchange memory and add */ #define SYS_XTENSA_ATOMIC_ADD 3 /* add to memory */ #define SYS_XTENSA_ATOMIC_CMP_SWP 4 /* compare and swap */ - #define SYS_XTENSA_COUNT 5 /* count */ -#undef __SYSCALL - #endif /* _UAPI_XTENSA_UNISTD_H */ diff --git a/arch/xtensa/kernel/syscall.c b/arch/xtensa/kernel/syscall.c index 8b417c9957c7..b8240e08f1f1 100644 --- a/arch/xtensa/kernel/syscall.c +++ b/arch/xtensa/kernel/syscall.c @@ -33,8 +33,9 @@ typedef void (*syscall_t)(void); syscall_t sys_call_table[__NR_syscalls] /* FIXME __cacheline_aligned */= { [0 ... __NR_syscalls - 1] = (syscall_t)&sys_ni_syscall, -#define __SYSCALL(nr,symbol,nargs) [ nr ] = (syscall_t)symbol, -#include +#define __SYSCALL(nr, entry, nargs)[nr] = (syscall_t)entry, +#include +#undef __SYSCALL }; #define COLOUR_ALIGN(addr, pgoff) \ From 8ed3a5426b4245ae22e01f8a65573b8fd5854004 Mon Sep 17 00:00:00 2001 From: Max Filippov Date: Thu, 15 Nov 2018 18:17:41 -0800 Subject: [PATCH 04/25] xtensa: drop fast_syscall_kernel There must be no xtensa-specific syscalls from the kernel code: register spilling uses call+entry sequence and atomics have proper function implementations. Drop fast_syscall_xtensa. Signed-off-by: Max Filippov --- arch/xtensa/kernel/entry.S | 19 ------------------- arch/xtensa/kernel/traps.c | 2 -- 2 files changed, 21 deletions(-) diff --git a/arch/xtensa/kernel/entry.S b/arch/xtensa/kernel/entry.S index b0007567e497..48d36b4d27b8 100644 --- a/arch/xtensa/kernel/entry.S +++ b/arch/xtensa/kernel/entry.S @@ -1022,25 +1022,6 @@ ENDPROC(fast_alloca) * excsave_1: dispatch table */ -ENTRY(fast_syscall_kernel) - - /* Skip syscall. */ - - rsr a0, epc1 - addi a0, a0, 3 - wsr a0, epc1 - - l32i a0, a2, PT_DEPC - bgeui a0, VALID_DOUBLE_EXCEPTION_ADDRESS, fast_syscall_unrecoverable - - rsr a0, depc # get syscall-nr - _beqz a0, fast_syscall_spill_registers - _beqi a0, __NR_xtensa, fast_syscall_xtensa - - j kernel_exception - -ENDPROC(fast_syscall_kernel) - ENTRY(fast_syscall_user) /* Skip syscall. */ diff --git a/arch/xtensa/kernel/traps.c b/arch/xtensa/kernel/traps.c index 86507fa7c2d7..238399e22cdc 100644 --- a/arch/xtensa/kernel/traps.c +++ b/arch/xtensa/kernel/traps.c @@ -51,7 +51,6 @@ extern void kernel_exception(void); extern void user_exception(void); -extern void fast_syscall_kernel(void); extern void fast_syscall_user(void); extern void fast_alloca(void); extern void fast_unaligned(void); @@ -89,7 +88,6 @@ typedef struct { static dispatch_init_table_t __initdata dispatch_init_table[] = { { EXCCAUSE_ILLEGAL_INSTRUCTION, 0, do_illegal_instruction}, -{ EXCCAUSE_SYSTEM_CALL, KRNL, fast_syscall_kernel }, { EXCCAUSE_SYSTEM_CALL, USER, fast_syscall_user }, { EXCCAUSE_SYSTEM_CALL, 0, system_call }, /* EXCCAUSE_INSTRUCTION_FETCH unhandled */ From 44ba57a23cde862dfd98c65fb2cfa0affc05a9ad Mon Sep 17 00:00:00 2001 From: Max Filippov Date: Thu, 15 Nov 2018 19:38:51 -0800 Subject: [PATCH 05/25] xtensa: drop unused field from the struct exc_table exc_table::syscall_save and corresponding macro EXC_TABLE_SYSCALL_SAVE have never been used by the xtensa code. Drop them. Signed-off-by: Max Filippov --- arch/xtensa/include/asm/traps.h | 2 -- arch/xtensa/kernel/asm-offsets.c | 2 -- 2 files changed, 4 deletions(-) diff --git a/arch/xtensa/include/asm/traps.h b/arch/xtensa/include/asm/traps.h index f5cd7a7e65e0..f720a57d0a5b 100644 --- a/arch/xtensa/include/asm/traps.h +++ b/arch/xtensa/include/asm/traps.h @@ -25,8 +25,6 @@ struct exc_table { void *fixup; /* For passing a parameter to fixup */ void *fixup_param; - /* For fast syscall handler */ - unsigned long syscall_save; /* Fast user exception handlers */ void *fast_user_handler[EXCCAUSE_N]; /* Fast kernel exception handlers */ diff --git a/arch/xtensa/kernel/asm-offsets.c b/arch/xtensa/kernel/asm-offsets.c index 120dd746a147..33a257b33723 100644 --- a/arch/xtensa/kernel/asm-offsets.c +++ b/arch/xtensa/kernel/asm-offsets.c @@ -137,8 +137,6 @@ int main(void) DEFINE(EXC_TABLE_DOUBLE_SAVE, offsetof(struct exc_table, double_save)); DEFINE(EXC_TABLE_FIXUP, offsetof(struct exc_table, fixup)); DEFINE(EXC_TABLE_PARAM, offsetof(struct exc_table, fixup_param)); - DEFINE(EXC_TABLE_SYSCALL_SAVE, - offsetof(struct exc_table, syscall_save)); DEFINE(EXC_TABLE_FAST_USER, offsetof(struct exc_table, fast_user_handler)); DEFINE(EXC_TABLE_FAST_KERNEL, From 633f1ffbccc752a867e41f4d312c19ef2c3d1b22 Mon Sep 17 00:00:00 2001 From: Max Filippov Date: Sat, 24 Nov 2018 20:51:52 -0800 Subject: [PATCH 06/25] xtensa: drop custom PTRACE_{PEEK,POKE}{TEXT,DATA} Custom implementations of these ptrace calls are the same as generic implementations. Drop custom code and use generic. Signed-off-by: Max Filippov --- arch/xtensa/kernel/ptrace.c | 10 ---------- 1 file changed, 10 deletions(-) diff --git a/arch/xtensa/kernel/ptrace.c b/arch/xtensa/kernel/ptrace.c index d9541be0605a..8fec063964ae 100644 --- a/arch/xtensa/kernel/ptrace.c +++ b/arch/xtensa/kernel/ptrace.c @@ -447,20 +447,10 @@ long arch_ptrace(struct task_struct *child, long request, void __user *datap = (void __user *) data; switch (request) { - case PTRACE_PEEKTEXT: /* read word at location addr. */ - case PTRACE_PEEKDATA: - ret = generic_ptrace_peekdata(child, addr, data); - break; - case PTRACE_PEEKUSR: /* read register specified by addr. */ ret = ptrace_peekusr(child, addr, datap); break; - case PTRACE_POKETEXT: /* write the word at location addr. */ - case PTRACE_POKEDATA: - ret = generic_ptrace_pokedata(child, addr, data); - break; - case PTRACE_POKEUSR: /* write register specified by addr. */ ret = ptrace_pokeusr(child, addr, data); break; From 3ffc2df9c76d3e1e02367dc3361902c1e9870b5d Mon Sep 17 00:00:00 2001 From: Max Filippov Date: Mon, 26 Nov 2018 13:15:21 -0800 Subject: [PATCH 07/25] xtensa: drop unused coprocessor helper functions coprocessor_save, coprocessor_load and coprocessor_restore are neither used nor exported for use by modules. Drop them. Signed-off-by: Max Filippov --- arch/xtensa/include/asm/coprocessor.h | 3 -- arch/xtensa/kernel/coprocessor.S | 68 ++------------------------- 2 files changed, 3 insertions(+), 68 deletions(-) diff --git a/arch/xtensa/include/asm/coprocessor.h b/arch/xtensa/include/asm/coprocessor.h index 677501b32dfc..eafe986a0246 100644 --- a/arch/xtensa/include/asm/coprocessor.h +++ b/arch/xtensa/include/asm/coprocessor.h @@ -157,10 +157,7 @@ typedef struct { XCHAL_CP7_SA_LIST(2) } xtregs_cp7_t __attribute__ ((aligned (XCHAL_CP7_SA_ALIGN))); extern struct thread_info* coprocessor_owner[XCHAL_CP_MAX]; -extern void coprocessor_save(void*, int); -extern void coprocessor_load(void*, int); extern void coprocessor_flush(struct thread_info*, int); -extern void coprocessor_restore(struct thread_info*, int); extern void coprocessor_release_all(struct thread_info*); extern void coprocessor_flush_all(struct thread_info*); diff --git a/arch/xtensa/kernel/coprocessor.S b/arch/xtensa/kernel/coprocessor.S index 4f8b52d575a2..43091429363d 100644 --- a/arch/xtensa/kernel/coprocessor.S +++ b/arch/xtensa/kernel/coprocessor.S @@ -105,63 +105,17 @@ LOAD_CP_REGS_TAB(7) /* - * coprocessor_save(buffer, index) - * a2 a3 - * coprocessor_load(buffer, index) - * a2 a3 - * - * Save or load coprocessor registers for coprocessor 'index'. - * The register values are saved to or loaded from them 'buffer' address. - * - * Note that these functions don't update the coprocessor_owner information! - * - */ - -ENTRY(coprocessor_save) - - entry a1, 32 - s32i a0, a1, 0 - movi a0, .Lsave_cp_regs_jump_table - addx8 a3, a3, a0 - l32i a3, a3, 0 - beqz a3, 1f - add a0, a0, a3 - callx0 a0 -1: l32i a0, a1, 0 - retw - -ENDPROC(coprocessor_save) - -ENTRY(coprocessor_load) - - entry a1, 32 - s32i a0, a1, 0 - movi a0, .Lload_cp_regs_jump_table - addx4 a3, a3, a0 - l32i a3, a3, 0 - beqz a3, 1f - add a0, a0, a3 - callx0 a0 -1: l32i a0, a1, 0 - retw - -ENDPROC(coprocessor_load) - -/* - * coprocessor_flush(struct task_info*, index) + * coprocessor_flush(struct thread_info*, index) * a2 a3 - * coprocessor_restore(struct task_info*, index) - * a2 a3 * - * Save or load coprocessor registers for coprocessor 'index'. + * Save coprocessor registers for coprocessor 'index'. * The register values are saved to or loaded from the coprocessor area * inside the task_info structure. * - * Note that these functions don't update the coprocessor_owner information! + * Note that this function doesn't update the coprocessor_owner information! * */ - ENTRY(coprocessor_flush) entry a1, 32 @@ -179,22 +133,6 @@ ENTRY(coprocessor_flush) ENDPROC(coprocessor_flush) -ENTRY(coprocessor_restore) - entry a1, 32 - s32i a0, a1, 0 - movi a0, .Lload_cp_regs_jump_table - addx4 a3, a3, a0 - l32i a4, a3, 4 - l32i a3, a3, 0 - add a2, a2, a4 - beqz a3, 1f - add a0, a0, a3 - callx0 a0 -1: l32i a0, a1, 0 - retw - -ENDPROC(coprocessor_restore) - /* * Entry condition: * From 58b17c55b610c11b60f1da71c20cc09cfa4e47db Mon Sep 17 00:00:00 2001 From: Max Filippov Date: Fri, 9 Nov 2018 14:39:24 -0800 Subject: [PATCH 08/25] xtensa: clean up syscall.h Drop non-existent/unneeded function declarations, add header guard. Signed-off-by: Max Filippov --- arch/xtensa/include/asm/syscall.h | 19 ++++++------------- 1 file changed, 6 insertions(+), 13 deletions(-) diff --git a/arch/xtensa/include/asm/syscall.h b/arch/xtensa/include/asm/syscall.h index 3673ff1f1bc5..d98e0303917d 100644 --- a/arch/xtensa/include/asm/syscall.h +++ b/arch/xtensa/include/asm/syscall.h @@ -1,27 +1,20 @@ /* - * include/asm-xtensa/syscall.h - * * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (C) 2001 - 2007 Tensilica Inc. + * Copyright (C) 2018 Cadence Design Systems Inc. */ +#ifndef _ASM_SYSCALL_H +#define _ASM_SYSCALL_H + struct pt_regs; -asmlinkage long xtensa_ptrace(long, long, long, long); -asmlinkage long xtensa_sigreturn(struct pt_regs*); + asmlinkage long xtensa_rt_sigreturn(struct pt_regs*); asmlinkage long xtensa_shmat(int, char __user *, int); asmlinkage long xtensa_fadvise64_64(int, int, unsigned long long, unsigned long long); -/* Should probably move to linux/syscalls.h */ -struct pollfd; -asmlinkage long sys_pselect6(int n, fd_set __user *inp, fd_set __user *outp, - fd_set __user *exp, struct timespec __user *tsp, - void __user *sig); -asmlinkage long sys_ppoll(struct pollfd __user *ufds, unsigned int nfds, - struct timespec __user *tsp, - const sigset_t __user *sigmask, - size_t sigsetsize); +#endif From c066cc8af9de8f749d29f75ad8c1c37d565f32b7 Mon Sep 17 00:00:00 2001 From: Max Filippov Date: Tue, 20 Nov 2018 18:46:20 -0800 Subject: [PATCH 09/25] xtensa: drop unused declarations from elf.h do_copy_regs, do_restore_regs, do_save_fpregs and do_restore_fpregs are not used or implemented by xtensa, drop these declarations from the arch/xtensa/include/asm/elf.h Signed-off-by: Max Filippov --- arch/xtensa/include/asm/elf.h | 11 ----------- 1 file changed, 11 deletions(-) diff --git a/arch/xtensa/include/asm/elf.h b/arch/xtensa/include/asm/elf.h index eacb25a41718..0cd01b0c00bd 100644 --- a/arch/xtensa/include/asm/elf.h +++ b/arch/xtensa/include/asm/elf.h @@ -193,15 +193,4 @@ typedef struct { #define SET_PERSONALITY(ex) \ set_personality(PER_LINUX_32BIT | (current->personality & (~PER_MASK))) -struct task_struct; - -extern void do_copy_regs (xtensa_gregset_t*, struct pt_regs*, - struct task_struct*); -extern void do_restore_regs (xtensa_gregset_t*, struct pt_regs*, - struct task_struct*); -extern void do_save_fpregs (elf_fpregset_t*, struct pt_regs*, - struct task_struct*); -extern int do_restore_fpregs (elf_fpregset_t*, struct pt_regs*, - struct task_struct*); - #endif /* _XTENSA_ELF_H */ From cad6fade6e78030e60188da3f18090577daa9243 Mon Sep 17 00:00:00 2001 From: Max Filippov Date: Tue, 27 Nov 2018 16:27:47 -0800 Subject: [PATCH 10/25] xtensa: clean up WSR*/RSR*/get_sr/set_sr WSR and RSR are too generic and collide with other macro definitions in the kernel causing warnings in allmodconfig builds. Drop WSR and RSR macros and WSR_* and RSR_* variants. Change get_sr and set_sr to xtensa_get_sr and xtensa_set_sr. Fix up users. Signed-off-by: Max Filippov --- arch/xtensa/include/asm/coprocessor.h | 20 -------------------- arch/xtensa/include/asm/irqflags.h | 1 + arch/xtensa/include/asm/processor.h | 16 ++++++++++++---- arch/xtensa/include/asm/thread_info.h | 1 + arch/xtensa/include/asm/timex.h | 18 ++++-------------- arch/xtensa/kernel/hw_breakpoint.c | 21 +++++++++++---------- arch/xtensa/kernel/process.c | 8 ++++---- arch/xtensa/kernel/setup.c | 8 ++++---- arch/xtensa/kernel/traps.c | 8 ++++---- drivers/irqchip/irq-xtensa-mx.c | 10 +++++----- drivers/irqchip/irq-xtensa-pic.c | 8 ++++---- 11 files changed, 50 insertions(+), 69 deletions(-) diff --git a/arch/xtensa/include/asm/coprocessor.h b/arch/xtensa/include/asm/coprocessor.h index eafe986a0246..6712929a27c9 100644 --- a/arch/xtensa/include/asm/coprocessor.h +++ b/arch/xtensa/include/asm/coprocessor.h @@ -12,7 +12,6 @@ #ifndef _XTENSA_COPROCESSOR_H #define _XTENSA_COPROCESSOR_H -#include #include #include #include @@ -90,19 +89,6 @@ #ifndef __ASSEMBLY__ - -#if XCHAL_HAVE_CP - -#define RSR_CPENABLE(x) do { \ - __asm__ __volatile__("rsr %0, cpenable" : "=a" (x)); \ - } while(0); -#define WSR_CPENABLE(x) do { \ - __asm__ __volatile__("wsr %0, cpenable; rsync" :: "a" (x)); \ - } while(0); - -#endif /* XCHAL_HAVE_CP */ - - /* * Additional registers. * We define three types of additional registers: @@ -162,12 +148,6 @@ extern void coprocessor_flush(struct thread_info*, int); extern void coprocessor_release_all(struct thread_info*); extern void coprocessor_flush_all(struct thread_info*); -static inline void coprocessor_clear_cpenable(void) -{ - unsigned long i = 0; - WSR_CPENABLE(i); -} - #endif /* XTENSA_HAVE_COPROCESSORS */ #endif /* !__ASSEMBLY__ */ diff --git a/arch/xtensa/include/asm/irqflags.h b/arch/xtensa/include/asm/irqflags.h index 407606e576f8..9b5e8526afe5 100644 --- a/arch/xtensa/include/asm/irqflags.h +++ b/arch/xtensa/include/asm/irqflags.h @@ -12,6 +12,7 @@ #ifndef _XTENSA_IRQFLAGS_H #define _XTENSA_IRQFLAGS_H +#include #include #include diff --git a/arch/xtensa/include/asm/processor.h b/arch/xtensa/include/asm/processor.h index 34a23016dd14..f7dd895b2353 100644 --- a/arch/xtensa/include/asm/processor.h +++ b/arch/xtensa/include/asm/processor.h @@ -13,6 +13,7 @@ #include #include +#include #include #include #include @@ -212,11 +213,18 @@ extern unsigned long get_wchan(struct task_struct *p); /* Special register access. */ -#define WSR(v,sr) __asm__ __volatile__ ("wsr %0,"__stringify(sr) :: "a"(v)); -#define RSR(v,sr) __asm__ __volatile__ ("rsr %0,"__stringify(sr) : "=a"(v)); +#define xtensa_set_sr(x, sr) \ + ({ \ + unsigned int v = (unsigned int)(x); \ + __asm__ __volatile__ ("wsr %0, "__stringify(sr) :: "a"(v)); \ + }) -#define set_sr(x,sr) ({unsigned int v=(unsigned int)x; WSR(v,sr);}) -#define get_sr(sr) ({unsigned int v; RSR(v,sr); v; }) +#define xtensa_get_sr(sr) \ + ({ \ + unsigned int v; \ + __asm__ __volatile__ ("rsr %0, "__stringify(sr) : "=a"(v)); \ + v; \ + }) #ifndef XCHAL_HAVE_EXTERN_REGS #define XCHAL_HAVE_EXTERN_REGS 0 diff --git a/arch/xtensa/include/asm/thread_info.h b/arch/xtensa/include/asm/thread_info.h index 2bd19ae61e47..49aa7879afde 100644 --- a/arch/xtensa/include/asm/thread_info.h +++ b/arch/xtensa/include/asm/thread_info.h @@ -11,6 +11,7 @@ #ifndef _XTENSA_THREAD_INFO_H #define _XTENSA_THREAD_INFO_H +#include #include #define CURRENT_SHIFT KERNEL_STACK_SHIFT diff --git a/arch/xtensa/include/asm/timex.h b/arch/xtensa/include/asm/timex.h index f9b389d4e973..233ec75e60c6 100644 --- a/arch/xtensa/include/asm/timex.h +++ b/arch/xtensa/include/asm/timex.h @@ -10,7 +10,6 @@ #define _XTENSA_TIMEX_H #include -#include #if XCHAL_NUM_TIMERS > 0 && \ XTENSA_INT_LEVEL(XCHAL_TIMER0_INTERRUPT) <= XCHAL_EXCM_LEVEL @@ -40,33 +39,24 @@ void local_timer_setup(unsigned cpu); * Register access. */ -#define WSR_CCOUNT(r) asm volatile ("wsr %0, ccount" :: "a" (r)) -#define RSR_CCOUNT(r) asm volatile ("rsr %0, ccount" : "=a" (r)) -#define WSR_CCOMPARE(x,r) asm volatile ("wsr %0,"__stringify(SREG_CCOMPARE)"+"__stringify(x) :: "a"(r)) -#define RSR_CCOMPARE(x,r) asm volatile ("rsr %0,"__stringify(SREG_CCOMPARE)"+"__stringify(x) : "=a"(r)) - static inline unsigned long get_ccount (void) { - unsigned long ccount; - RSR_CCOUNT(ccount); - return ccount; + return xtensa_get_sr(ccount); } static inline void set_ccount (unsigned long ccount) { - WSR_CCOUNT(ccount); + xtensa_set_sr(ccount, ccount); } static inline unsigned long get_linux_timer (void) { - unsigned ccompare; - RSR_CCOMPARE(LINUX_TIMER, ccompare); - return ccompare; + return xtensa_get_sr(SREG_CCOMPARE + LINUX_TIMER); } static inline void set_linux_timer (unsigned long ccompare) { - WSR_CCOMPARE(LINUX_TIMER, ccompare); + xtensa_set_sr(ccompare, SREG_CCOMPARE + LINUX_TIMER); } #endif /* _XTENSA_TIMEX_H */ diff --git a/arch/xtensa/kernel/hw_breakpoint.c b/arch/xtensa/kernel/hw_breakpoint.c index c2e387c19cda..4f20416061fb 100644 --- a/arch/xtensa/kernel/hw_breakpoint.c +++ b/arch/xtensa/kernel/hw_breakpoint.c @@ -101,30 +101,30 @@ static void xtensa_wsr(unsigned long v, u8 sr) switch (sr) { #if XCHAL_NUM_IBREAK > 0 case SREG_IBREAKA + 0: - WSR(v, SREG_IBREAKA + 0); + xtensa_set_sr(v, SREG_IBREAKA + 0); break; #endif #if XCHAL_NUM_IBREAK > 1 case SREG_IBREAKA + 1: - WSR(v, SREG_IBREAKA + 1); + xtensa_set_sr(v, SREG_IBREAKA + 1); break; #endif #if XCHAL_NUM_DBREAK > 0 case SREG_DBREAKA + 0: - WSR(v, SREG_DBREAKA + 0); + xtensa_set_sr(v, SREG_DBREAKA + 0); break; case SREG_DBREAKC + 0: - WSR(v, SREG_DBREAKC + 0); + xtensa_set_sr(v, SREG_DBREAKC + 0); break; #endif #if XCHAL_NUM_DBREAK > 1 case SREG_DBREAKA + 1: - WSR(v, SREG_DBREAKA + 1); + xtensa_set_sr(v, SREG_DBREAKA + 1); break; case SREG_DBREAKC + 1: - WSR(v, SREG_DBREAKC + 1); + xtensa_set_sr(v, SREG_DBREAKC + 1); break; #endif } @@ -150,8 +150,8 @@ static void set_ibreak_regs(int reg, struct perf_event *bp) unsigned long ibreakenable; xtensa_wsr(info->address, SREG_IBREAKA + reg); - RSR(ibreakenable, SREG_IBREAKENABLE); - WSR(ibreakenable | (1 << reg), SREG_IBREAKENABLE); + ibreakenable = xtensa_get_sr(SREG_IBREAKENABLE); + xtensa_set_sr(ibreakenable | (1 << reg), SREG_IBREAKENABLE); } static void set_dbreak_regs(int reg, struct perf_event *bp) @@ -214,8 +214,9 @@ void arch_uninstall_hw_breakpoint(struct perf_event *bp) /* Breakpoint */ i = free_slot(this_cpu_ptr(bp_on_reg), XCHAL_NUM_IBREAK, bp); if (i >= 0) { - RSR(ibreakenable, SREG_IBREAKENABLE); - WSR(ibreakenable & ~(1 << i), SREG_IBREAKENABLE); + ibreakenable = xtensa_get_sr(SREG_IBREAKENABLE); + xtensa_set_sr(ibreakenable & ~(1 << i), + SREG_IBREAKENABLE); } } else { /* Watchpoint */ diff --git a/arch/xtensa/kernel/process.c b/arch/xtensa/kernel/process.c index 4bb68133a72a..be9e0c3df9d2 100644 --- a/arch/xtensa/kernel/process.c +++ b/arch/xtensa/kernel/process.c @@ -87,7 +87,7 @@ void coprocessor_release_all(struct thread_info *ti) } ti->cpenable = cpenable; - coprocessor_clear_cpenable(); + xtensa_set_sr(0, cpenable); preempt_enable(); } @@ -99,16 +99,16 @@ void coprocessor_flush_all(struct thread_info *ti) preempt_disable(); - RSR_CPENABLE(old_cpenable); + old_cpenable = xtensa_get_sr(cpenable); cpenable = ti->cpenable; - WSR_CPENABLE(cpenable); + xtensa_set_sr(cpenable, cpenable); for (i = 0; i < XCHAL_CP_MAX; i++) { if ((cpenable & 1) != 0 && coprocessor_owner[i] == ti) coprocessor_flush(ti, i); cpenable >>= 1; } - WSR_CPENABLE(old_cpenable); + xtensa_set_sr(old_cpenable, cpenable); preempt_enable(); } diff --git a/arch/xtensa/kernel/setup.c b/arch/xtensa/kernel/setup.c index 351283b60df6..4ec6fbb696bf 100644 --- a/arch/xtensa/kernel/setup.c +++ b/arch/xtensa/kernel/setup.c @@ -318,9 +318,9 @@ static inline int mem_reserve(unsigned long start, unsigned long end) void __init setup_arch(char **cmdline_p) { pr_info("config ID: %08x:%08x\n", - get_sr(SREG_EPC), get_sr(SREG_EXCSAVE)); - if (get_sr(SREG_EPC) != XCHAL_HW_CONFIGID0 || - get_sr(SREG_EXCSAVE) != XCHAL_HW_CONFIGID1) + xtensa_get_sr(SREG_EPC), xtensa_get_sr(SREG_EXCSAVE)); + if (xtensa_get_sr(SREG_EPC) != XCHAL_HW_CONFIGID0 || + xtensa_get_sr(SREG_EXCSAVE) != XCHAL_HW_CONFIGID1) pr_info("built for config ID: %08x:%08x\n", XCHAL_HW_CONFIGID0, XCHAL_HW_CONFIGID1); @@ -596,7 +596,7 @@ c_show(struct seq_file *f, void *slot) num_online_cpus(), cpumask_pr_args(cpu_online_mask), XCHAL_BUILD_UNIQUE_ID, - get_sr(SREG_EPC), get_sr(SREG_EXCSAVE), + xtensa_get_sr(SREG_EPC), xtensa_get_sr(SREG_EXCSAVE), XCHAL_HAVE_BE ? "big" : "little", ccount_freq/1000000, (ccount_freq/10000) % 100, diff --git a/arch/xtensa/kernel/traps.c b/arch/xtensa/kernel/traps.c index 238399e22cdc..e6fa55aa1ccb 100644 --- a/arch/xtensa/kernel/traps.c +++ b/arch/xtensa/kernel/traps.c @@ -213,8 +213,8 @@ extern void do_IRQ(int, struct pt_regs *); static inline void check_valid_nmi(void) { - unsigned intread = get_sr(interrupt); - unsigned intenable = get_sr(intenable); + unsigned intread = xtensa_get_sr(interrupt); + unsigned intenable = xtensa_get_sr(intenable); BUG_ON(intread & intenable & ~(XTENSA_INTLEVEL_ANDBELOW_MASK(PROFILING_INTLEVEL) ^ @@ -271,8 +271,8 @@ void do_interrupt(struct pt_regs *regs) irq_enter(); for (;;) { - unsigned intread = get_sr(interrupt); - unsigned intenable = get_sr(intenable); + unsigned intread = xtensa_get_sr(interrupt); + unsigned intenable = xtensa_get_sr(intenable); unsigned int_at_level = intread & intenable; unsigned level; diff --git a/drivers/irqchip/irq-xtensa-mx.c b/drivers/irqchip/irq-xtensa-mx.c index e539500752d4..5385f5768345 100644 --- a/drivers/irqchip/irq-xtensa-mx.c +++ b/drivers/irqchip/irq-xtensa-mx.c @@ -62,7 +62,7 @@ void secondary_init_irq(void) __this_cpu_write(cached_irq_mask, XCHAL_INTTYPE_MASK_EXTERN_EDGE | XCHAL_INTTYPE_MASK_EXTERN_LEVEL); - set_sr(XCHAL_INTTYPE_MASK_EXTERN_EDGE | + xtensa_set_sr(XCHAL_INTTYPE_MASK_EXTERN_EDGE | XCHAL_INTTYPE_MASK_EXTERN_LEVEL, intenable); } @@ -77,7 +77,7 @@ static void xtensa_mx_irq_mask(struct irq_data *d) } else { mask = __this_cpu_read(cached_irq_mask) & ~mask; __this_cpu_write(cached_irq_mask, mask); - set_sr(mask, intenable); + xtensa_set_sr(mask, intenable); } } @@ -92,7 +92,7 @@ static void xtensa_mx_irq_unmask(struct irq_data *d) } else { mask |= __this_cpu_read(cached_irq_mask); __this_cpu_write(cached_irq_mask, mask); - set_sr(mask, intenable); + xtensa_set_sr(mask, intenable); } } @@ -108,12 +108,12 @@ static void xtensa_mx_irq_disable(struct irq_data *d) static void xtensa_mx_irq_ack(struct irq_data *d) { - set_sr(1 << d->hwirq, intclear); + xtensa_set_sr(1 << d->hwirq, intclear); } static int xtensa_mx_irq_retrigger(struct irq_data *d) { - set_sr(1 << d->hwirq, intset); + xtensa_set_sr(1 << d->hwirq, intset); return 1; } diff --git a/drivers/irqchip/irq-xtensa-pic.c b/drivers/irqchip/irq-xtensa-pic.c index 000cb5462bcf..c200234dd2c9 100644 --- a/drivers/irqchip/irq-xtensa-pic.c +++ b/drivers/irqchip/irq-xtensa-pic.c @@ -44,13 +44,13 @@ static const struct irq_domain_ops xtensa_irq_domain_ops = { static void xtensa_irq_mask(struct irq_data *d) { cached_irq_mask &= ~(1 << d->hwirq); - set_sr(cached_irq_mask, intenable); + xtensa_set_sr(cached_irq_mask, intenable); } static void xtensa_irq_unmask(struct irq_data *d) { cached_irq_mask |= 1 << d->hwirq; - set_sr(cached_irq_mask, intenable); + xtensa_set_sr(cached_irq_mask, intenable); } static void xtensa_irq_enable(struct irq_data *d) @@ -65,12 +65,12 @@ static void xtensa_irq_disable(struct irq_data *d) static void xtensa_irq_ack(struct irq_data *d) { - set_sr(1 << d->hwirq, intclear); + xtensa_set_sr(1 << d->hwirq, intclear); } static int xtensa_irq_retrigger(struct irq_data *d) { - set_sr(1 << d->hwirq, intset); + xtensa_set_sr(1 << d->hwirq, intset); return 1; } From 5dacbbef3d29598dcb6ecf747a7dae4fbb4ce039 Mon Sep 17 00:00:00 2001 From: Max Filippov Date: Sun, 25 Nov 2018 23:32:28 -0800 Subject: [PATCH 11/25] xtensa: simplify coprocessor.S Use addresses instead of offsets and drop unneeded offset -> address calculations. Don't generate any code for undefined coprocessors. Signed-off-by: Max Filippov --- arch/xtensa/kernel/coprocessor.S | 36 ++++++++++++++++---------------- 1 file changed, 18 insertions(+), 18 deletions(-) diff --git a/arch/xtensa/kernel/coprocessor.S b/arch/xtensa/kernel/coprocessor.S index 43091429363d..92bf24a9da92 100644 --- a/arch/xtensa/kernel/coprocessor.S +++ b/arch/xtensa/kernel/coprocessor.S @@ -33,16 +33,16 @@ */ #define SAVE_CP_REGS(x) \ - .align 4; \ - .Lsave_cp_regs_cp##x: \ .if XTENSA_HAVE_COPROCESSOR(x); \ + .align 4; \ + .Lsave_cp_regs_cp##x: \ xchal_cp##x##_store a2 a4 a5 a6 a7; \ - .endif; \ - jx a0 + jx a0; \ + .endif #define SAVE_CP_REGS_TAB(x) \ .if XTENSA_HAVE_COPROCESSOR(x); \ - .long .Lsave_cp_regs_cp##x - .Lsave_cp_regs_jump_table; \ + .long .Lsave_cp_regs_cp##x; \ .else; \ .long 0; \ .endif; \ @@ -50,16 +50,16 @@ #define LOAD_CP_REGS(x) \ - .align 4; \ - .Lload_cp_regs_cp##x: \ .if XTENSA_HAVE_COPROCESSOR(x); \ + .align 4; \ + .Lload_cp_regs_cp##x: \ xchal_cp##x##_load a2 a4 a5 a6 a7; \ - .endif; \ - jx a0 + jx a0; \ + .endif #define LOAD_CP_REGS_TAB(x) \ .if XTENSA_HAVE_COPROCESSOR(x); \ - .long .Lload_cp_regs_cp##x - .Lload_cp_regs_jump_table; \ + .long .Lload_cp_regs_cp##x; \ .else; \ .long 0; \ .endif; \ @@ -83,6 +83,7 @@ LOAD_CP_REGS(6) LOAD_CP_REGS(7) + .section ".rodata", "a" .align 4 .Lsave_cp_regs_jump_table: SAVE_CP_REGS_TAB(0) @@ -104,6 +105,8 @@ LOAD_CP_REGS_TAB(6) LOAD_CP_REGS_TAB(7) + .previous + /* * coprocessor_flush(struct thread_info*, index) * a2 a3 @@ -126,8 +129,7 @@ ENTRY(coprocessor_flush) l32i a3, a3, 0 add a2, a2, a4 beqz a3, 1f - add a0, a0, a3 - callx0 a0 + callx0 a3 1: l32i a0, a1, 0 retw @@ -212,10 +214,9 @@ ENTRY(fast_coprocessor) movi a0, 2f # a0: 'return' address addx8 a3, a3, a5 # a3: coprocessor number l32i a2, a3, 4 # a2: xtregs offset - l32i a3, a3, 0 # a3: jump offset + l32i a3, a3, 0 # a3: jump address add a2, a2, a4 - add a4, a3, a5 # a4: address of save routine - jx a4 + jx a3 /* Note that only a0 and a1 were preserved. */ @@ -235,10 +236,9 @@ ENTRY(fast_coprocessor) movi a0, 1f addx8 a3, a3, a5 l32i a2, a3, 4 # a2: xtregs offset - l32i a3, a3, 0 # a3: jump offset + l32i a3, a3, 0 # a3: jump address add a2, a2, a4 - add a4, a3, a5 - jx a4 + jx a3 /* Restore all registers and return from exception handler. */ From be38e4f2cc08d91515b86a4a8ea75ba902795873 Mon Sep 17 00:00:00 2001 From: Max Filippov Date: Mon, 26 Nov 2018 16:30:51 -0800 Subject: [PATCH 12/25] xtensa: don't clear cpenable unconditionally on release Clearing cpenable special register for a task without changing coprocessor owner for the coprocessors that were enabled will result in coprocessor context flush and immediate reload at the next attempt to access this coprocessor if it happens before the context switch. Avoid it by only clearing cpenable special register if coprocessor_release_all is called for the current task. Signed-off-by: Max Filippov --- arch/xtensa/kernel/process.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/xtensa/kernel/process.c b/arch/xtensa/kernel/process.c index be9e0c3df9d2..27be75e88ed3 100644 --- a/arch/xtensa/kernel/process.c +++ b/arch/xtensa/kernel/process.c @@ -87,7 +87,8 @@ void coprocessor_release_all(struct thread_info *ti) } ti->cpenable = cpenable; - xtensa_set_sr(0, cpenable); + if (ti == current_thread_info()) + xtensa_set_sr(0, cpenable); preempt_enable(); } From f37598be4e3896359e87c824be57ddddc280cc3f Mon Sep 17 00:00:00 2001 From: Max Filippov Date: Tue, 4 Dec 2018 16:08:20 -0800 Subject: [PATCH 13/25] xtensa: xtfpga.dtsi: fix dtc warnings about SPI Rename SPI controller node in the XTFPGA DTS to spi@... This fixes the following build warnings: arch/xtensa/boot/dts/kc705_nommu.dtb: Warning (spi_bus_bridge): /soc/spi-master@0d0a0000: node name for SPI buses should be 'spi' arch/xtensa/boot/dts/kc705_nommu.dtb: Warning (spi_bus_reg): Failed prerequisite 'spi_bus_bridge' arch/xtensa/boot/dts/lx200mx.dtb: Warning (spi_bus_bridge): /soc/spi-master@0d0a0000: node name for SPI buses should be 'spi' arch/xtensa/boot/dts/lx200mx.dtb: Warning (spi_bus_reg): Failed prerequisite 'spi_bus_bridge' arch/xtensa/boot/dts/kc705.dtb: Warning (spi_bus_bridge): /soc/spi-master@0d0a0000: node name for SPI buses should be 'spi' arch/xtensa/boot/dts/kc705.dtb: Warning (spi_bus_reg): Failed prerequisite 'spi_bus_bridge' arch/xtensa/boot/dts/ml605.dtb: Warning (spi_bus_bridge): /soc/spi-master@0d0a0000: node name for SPI buses should be 'spi' arch/xtensa/boot/dts/ml605.dtb: Warning (spi_bus_reg): Failed prerequisite 'spi_bus_bridge' arch/xtensa/boot/dts/lx60.dtb: Warning (spi_bus_bridge): /soc/spi-master@0d0a0000: node name for SPI buses should be 'spi' arch/xtensa/boot/dts/lx60.dtb: Warning (spi_bus_reg): Failed prerequisite 'spi_bus_bridge' Signed-off-by: Max Filippov --- arch/xtensa/boot/dts/xtfpga.dtsi | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/xtensa/boot/dts/xtfpga.dtsi b/arch/xtensa/boot/dts/xtfpga.dtsi index 1090528825ec..e46ae07bab05 100644 --- a/arch/xtensa/boot/dts/xtfpga.dtsi +++ b/arch/xtensa/boot/dts/xtfpga.dtsi @@ -103,7 +103,7 @@ cdce706: clock-synth@69 { }; }; - spi0: spi-master@0d0a0000 { + spi0: spi@0d0a0000 { compatible = "cdns,xtfpga-spi"; #address-cells = <1>; #size-cells = <0>; From 037602705109ec2ab96340bea93ad87daa3ac046 Mon Sep 17 00:00:00 2001 From: Max Filippov Date: Wed, 5 Dec 2018 12:48:19 -0800 Subject: [PATCH 14/25] xtensa: don't use l32r opcode directly xtensa assembler is capable of representing register loads with either movi + addmi, l32r or const16, depending on the core configuration. Don't use '.literal' and 'l32r' directly in the code, use 'movi' and let the assembler relax them. Signed-off-by: Max Filippov --- arch/xtensa/boot/boot-elf/bootstrap.S | 29 +++++++++++++-------------- arch/xtensa/include/asm/futex.h | 8 ++++---- arch/xtensa/include/asm/uaccess.h | 10 ++++----- arch/xtensa/kernel/head.S | 8 ++------ 4 files changed, 24 insertions(+), 31 deletions(-) diff --git a/arch/xtensa/boot/boot-elf/bootstrap.S b/arch/xtensa/boot/boot-elf/bootstrap.S index 29c68426ab56..99e98c9bae41 100644 --- a/arch/xtensa/boot/boot-elf/bootstrap.S +++ b/arch/xtensa/boot/boot-elf/bootstrap.S @@ -29,17 +29,7 @@ _ResetVector: .begin no-absolute-literals .literal_position -#if defined(CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX) && \ - XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY - .literal RomInitAddr, CONFIG_KERNEL_LOAD_ADDRESS -#else - .literal RomInitAddr, KERNELOFFSET -#endif -#ifndef CONFIG_PARSE_BOOTPARAM - .literal RomBootParam, 0 -#else - .literal RomBootParam, _bootparam - +#ifdef CONFIG_PARSE_BOOTPARAM .align 4 _bootparam: .short BP_TAG_FIRST @@ -66,13 +56,22 @@ _SetupMMU: initialize_mmu #endif - .end no-absolute-literals - rsil a0, XCHAL_DEBUGLEVEL-1 rsync reset: - l32r a0, RomInitAddr - l32r a2, RomBootParam +#if defined(CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX) && \ + XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY + movi a0, CONFIG_KERNEL_LOAD_ADDRESS +#else + movi a0, KERNELOFFSET +#endif +#ifdef CONFIG_PARSE_BOOTPARAM + movi a2, _bootparam +#else + movi a2, 0 +#endif movi a3, 0 movi a4, 0 jx a0 + + .end no-absolute-literals diff --git a/arch/xtensa/include/asm/futex.h b/arch/xtensa/include/asm/futex.h index 5bfbc1c401d4..fd0eef6b8e7c 100644 --- a/arch/xtensa/include/asm/futex.h +++ b/arch/xtensa/include/asm/futex.h @@ -32,8 +32,8 @@ "3:\n" \ " .section .fixup,\"ax\"\n" \ " .align 4\n" \ - "4: .long 3b\n" \ - "5: l32r %0, 4b\n" \ + " .literal_position\n" \ + "5: movi %0, 3b\n" \ " movi %1, %3\n" \ " jx %0\n" \ " .previous\n" \ @@ -108,8 +108,8 @@ futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr, "2:\n" " .section .fixup,\"ax\"\n" " .align 4\n" - "3: .long 2b\n" - "4: l32r %1, 3b\n" + " .literal_position\n" + "4: movi %1, 2b\n" " movi %0, %7\n" " jx %1\n" " .previous\n" diff --git a/arch/xtensa/include/asm/uaccess.h b/arch/xtensa/include/asm/uaccess.h index f1158b4c629c..d11ef2939652 100644 --- a/arch/xtensa/include/asm/uaccess.h +++ b/arch/xtensa/include/asm/uaccess.h @@ -159,10 +159,9 @@ __asm__ __volatile__( \ "2: \n" \ " .section .fixup,\"ax\" \n" \ " .align 4 \n" \ - "4: \n" \ - " .long 2b \n" \ + " .literal_position \n" \ "5: \n" \ - " l32r %1, 4b \n" \ + " movi %1, 2b \n" \ " movi %0, %4 \n" \ " jx %1 \n" \ " .previous \n" \ @@ -217,10 +216,9 @@ __asm__ __volatile__( \ "2: \n" \ " .section .fixup,\"ax\" \n" \ " .align 4 \n" \ - "4: \n" \ - " .long 2b \n" \ + " .literal_position \n" \ "5: \n" \ - " l32r %1, 4b \n" \ + " movi %1, 2b \n" \ " movi %2, 0 \n" \ " movi %0, %4 \n" \ " jx %1 \n" \ diff --git a/arch/xtensa/kernel/head.S b/arch/xtensa/kernel/head.S index 9053a5622d2c..da08e75100ab 100644 --- a/arch/xtensa/kernel/head.S +++ b/arch/xtensa/kernel/head.S @@ -59,10 +59,6 @@ ENTRY(_start) .align 4 .literal_position -.Lstartup: - .word _startup - - .align 4 _SetupOCD: /* * Initialize WB, WS, and clear PS.EXCM (to allow loop instructions). @@ -99,12 +95,12 @@ _SetupMMU: 1: #endif #endif - .end no-absolute-literals - l32r a0, .Lstartup + movi a0, _startup jx a0 ENDPROC(_start) + .end no-absolute-literals __REF .literal_position From 4e460f656e9c8756fae32440ef3f6887e2ed4808 Mon Sep 17 00:00:00 2001 From: Max Filippov Date: Fri, 14 Dec 2018 14:41:58 -0800 Subject: [PATCH 15/25] xtensa: support memtest Call early_memtest from the bootmem_init to run memtest if it's configured and enabled. Signed-off-by: Max Filippov --- arch/xtensa/mm/init.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/xtensa/mm/init.c b/arch/xtensa/mm/init.c index 30a48bba4a47..d49861099684 100644 --- a/arch/xtensa/mm/init.c +++ b/arch/xtensa/mm/init.c @@ -60,6 +60,9 @@ void __init bootmem_init(void) max_pfn = PFN_DOWN(memblock_end_of_DRAM()); max_low_pfn = min(max_pfn, MAX_LOW_PFN); + early_memtest((phys_addr_t)min_low_pfn << PAGE_SHIFT, + (phys_addr_t)max_low_pfn << PAGE_SHIFT); + memblock_set_current_limit(PFN_PHYS(max_low_pfn)); dma_contiguous_reserve(PFN_PHYS(max_low_pfn)); From b61c41c28eb09ae1bb02479a8f65171c037124c6 Mon Sep 17 00:00:00 2001 From: "Dmitry V. Levin" Date: Thu, 13 Dec 2018 20:23:26 +0300 Subject: [PATCH 16/25] Move EM_XTENSA to uapi/linux/elf-em.h This should never have been defined in the arch tree to begin with, and now uapi/linux/audit.h header is going to use EM_XTENSA in order to define AUDIT_ARCH_XTENSA which is needed to implement syscall_get_arch() which in turn is required to extend the generic ptrace API with PTRACE_GET_SYSCALL_INFO request. Cc: Max Filippov Cc: Oleg Nesterov Cc: Andy Lutomirski Cc: Elvira Khabirova Cc: Eugene Syromyatnikov Cc: Chris Zankel Cc: linux-xtensa@linux-xtensa.org Signed-off-by: Dmitry V. Levin Signed-off-by: Max Filippov --- arch/xtensa/include/asm/elf.h | 2 +- include/uapi/linux/elf-em.h | 1 + 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/xtensa/include/asm/elf.h b/arch/xtensa/include/asm/elf.h index 0cd01b0c00bd..f3291b110a0d 100644 --- a/arch/xtensa/include/asm/elf.h +++ b/arch/xtensa/include/asm/elf.h @@ -15,10 +15,10 @@ #include #include +#include /* Xtensa processor ELF architecture-magic number */ -#define EM_XTENSA 94 #define EM_XTENSA_OLD 0xABC7 /* Xtensa relocations defined by the ABIs */ diff --git a/include/uapi/linux/elf-em.h b/include/uapi/linux/elf-em.h index 93722e60204c..d2fb964432f3 100644 --- a/include/uapi/linux/elf-em.h +++ b/include/uapi/linux/elf-em.h @@ -34,6 +34,7 @@ #define EM_M32R 88 /* Renesas M32R */ #define EM_MN10300 89 /* Panasonic/MEI MN10300, AM33 */ #define EM_OPENRISC 92 /* OpenRISC 32-bit embedded processor */ +#define EM_XTENSA 94 /* Tensilica Xtensa Architecture */ #define EM_BLACKFIN 106 /* ADI Blackfin Processor */ #define EM_ALTERA_NIOS2 113 /* Altera Nios II soft-core processor */ #define EM_TI_C6000 140 /* TI C6X DSPs */ From 98c3115a4ec56f03056efd9295e0fcb4c5c57a85 Mon Sep 17 00:00:00 2001 From: "Dmitry V. Levin" Date: Tue, 20 Nov 2018 03:17:01 +0300 Subject: [PATCH 17/25] xtensa: define syscall_get_arch() syscall_get_arch() is required to be implemented on all architectures in order to extend the generic ptrace API with PTRACE_GET_SYSCALL_INFO request. Signed-off-by: Dmitry V. Levin Acked-by: Max Filippov Signed-off-by: Max Filippov --- arch/xtensa/include/asm/syscall.h | 7 +++++++ include/uapi/linux/audit.h | 1 + 2 files changed, 8 insertions(+) diff --git a/arch/xtensa/include/asm/syscall.h b/arch/xtensa/include/asm/syscall.h index d98e0303917d..6969956d3f93 100644 --- a/arch/xtensa/include/asm/syscall.h +++ b/arch/xtensa/include/asm/syscall.h @@ -10,6 +10,13 @@ #ifndef _ASM_SYSCALL_H #define _ASM_SYSCALL_H +#include + +static inline int syscall_get_arch(void) +{ + return AUDIT_ARCH_XTENSA; +} + struct pt_regs; asmlinkage long xtensa_rt_sigreturn(struct pt_regs*); diff --git a/include/uapi/linux/audit.h b/include/uapi/linux/audit.h index 818ae690ab79..9e67fd359d58 100644 --- a/include/uapi/linux/audit.h +++ b/include/uapi/linux/audit.h @@ -411,6 +411,7 @@ enum { #define AUDIT_ARCH_TILEGX32 (EM_TILEGX|__AUDIT_ARCH_LE) #define AUDIT_ARCH_TILEPRO (EM_TILEPRO|__AUDIT_ARCH_LE) #define AUDIT_ARCH_X86_64 (EM_X86_64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE) +#define AUDIT_ARCH_XTENSA (EM_XTENSA) #define AUDIT_PERM_EXEC 1 #define AUDIT_PERM_WRITE 2 From 6a986984b63990c80252b2208036fe731a6ae113 Mon Sep 17 00:00:00 2001 From: Max Filippov Date: Fri, 9 Nov 2018 15:43:14 -0800 Subject: [PATCH 18/25] xtensa: use NO_SYSCALL instead of -1 For the sake of clarity define macro NO_SYSCALL and use it for setting/checking struct pt_regs::syscall field. Signed-off-by: Max Filippov --- arch/xtensa/include/asm/ptrace.h | 2 ++ arch/xtensa/kernel/entry.S | 2 +- arch/xtensa/kernel/ptrace.c | 2 +- arch/xtensa/kernel/signal.c | 8 ++++---- 4 files changed, 8 insertions(+), 6 deletions(-) diff --git a/arch/xtensa/include/asm/ptrace.h b/arch/xtensa/include/asm/ptrace.h index 3a5c5918aea3..f1b1de526d1d 100644 --- a/arch/xtensa/include/asm/ptrace.h +++ b/arch/xtensa/include/asm/ptrace.h @@ -39,6 +39,8 @@ * +-----------------------+ -------- */ +#define NO_SYSCALL (-1) + #ifndef __ASSEMBLY__ #include diff --git a/arch/xtensa/kernel/entry.S b/arch/xtensa/kernel/entry.S index 48d36b4d27b8..e41c1e1ccecb 100644 --- a/arch/xtensa/kernel/entry.S +++ b/arch/xtensa/kernel/entry.S @@ -364,7 +364,7 @@ common_exception: s32i a2, a1, PT_DEBUGCAUSE s32i a3, a1, PT_PC - movi a2, -1 + movi a2, NO_SYSCALL rsr a3, excvaddr s32i a2, a1, PT_SYSCALL movi a2, 0 diff --git a/arch/xtensa/kernel/ptrace.c b/arch/xtensa/kernel/ptrace.c index 8fec063964ae..86622d4db328 100644 --- a/arch/xtensa/kernel/ptrace.c +++ b/arch/xtensa/kernel/ptrace.c @@ -491,7 +491,7 @@ unsigned long do_syscall_trace_enter(struct pt_regs *regs) { if (test_thread_flag(TIF_SYSCALL_TRACE) && tracehook_report_syscall_entry(regs)) - return -1; + return NO_SYSCALL; return regs->areg[2]; } diff --git a/arch/xtensa/kernel/signal.c b/arch/xtensa/kernel/signal.c index f88e7a0b232c..74e1682876ac 100644 --- a/arch/xtensa/kernel/signal.c +++ b/arch/xtensa/kernel/signal.c @@ -185,13 +185,13 @@ restore_sigcontext(struct pt_regs *regs, struct rt_sigframe __user *frame) COPY(sar); #undef COPY - /* All registers were flushed to stack. Start with a prestine frame. */ + /* All registers were flushed to stack. Start with a pristine frame. */ regs->wmask = 1; regs->windowbase = 0; regs->windowstart = 1; - regs->syscall = -1; /* disable syscall checks */ + regs->syscall = NO_SYSCALL; /* disable syscall checks */ /* For PS, restore only PS.CALLINC. * Assume that all other bits are either the same as for the signal @@ -423,7 +423,7 @@ static void do_signal(struct pt_regs *regs) /* Are we from a system call? */ - if ((signed)regs->syscall >= 0) { + if (regs->syscall != NO_SYSCALL) { /* If so, check system call restarting.. */ @@ -462,7 +462,7 @@ static void do_signal(struct pt_regs *regs) } /* Did we come from a system call? */ - if ((signed) regs->syscall >= 0) { + if (regs->syscall != NO_SYSCALL) { /* Restart the system call - no handlers present */ switch (regs->areg[2]) { case -ERESTARTNOHAND: From 3aee3e25deeab083df21012060c98e9987ac9177 Mon Sep 17 00:00:00 2001 From: Max Filippov Date: Thu, 15 Nov 2018 19:33:47 -0800 Subject: [PATCH 19/25] xtensa: call do_syscall_trace_{enter,leave} selectively Check whether calls to do_syscall_trace_{enter,leave} are necessary in the system_call function. Define _TIF_WORK_MASK to a bitmask of flags that reuire the calls. Fix comment. Signed-off-by: Max Filippov --- arch/xtensa/include/asm/thread_info.h | 5 +---- arch/xtensa/kernel/entry.S | 26 +++++++++++++++++++------- arch/xtensa/kernel/ptrace.c | 5 ++--- 3 files changed, 22 insertions(+), 14 deletions(-) diff --git a/arch/xtensa/include/asm/thread_info.h b/arch/xtensa/include/asm/thread_info.h index 49aa7879afde..c823dddfebdf 100644 --- a/arch/xtensa/include/asm/thread_info.h +++ b/arch/xtensa/include/asm/thread_info.h @@ -101,8 +101,6 @@ static inline struct thread_info *current_thread_info(void) /* * thread information flags * - these are process state flags that various assembly files may need to access - * - pending work-to-be-done flags are in LSW - * - other flags in MSW */ #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ #define TIF_SIGPENDING 1 /* signal pending */ @@ -118,8 +116,7 @@ static inline struct thread_info *current_thread_info(void) #define _TIF_NEED_RESCHED (1<syscall = regs->areg[2] */ - l32i a3, a2, PT_AREG2 - mov a6, a2 - s32i a3, a2, PT_SYSCALL - call4 do_syscall_trace_enter - mov a3, a6 + l32i a7, a2, PT_AREG2 + s32i a7, a2, PT_SYSCALL + GET_THREAD_INFO(a4, a1) + l32i a3, a4, TI_FLAGS + movi a4, _TIF_WORK_MASK + and a3, a3, a4 + beqz a3, 1f + + mov a6, a2 + call4 do_syscall_trace_enter + l32i a7, a2, PT_SYSCALL + +1: /* syscall = sys_call_table[syscall_nr] */ movi a4, sys_call_table movi a5, __NR_syscalls movi a6, -ENOSYS - bgeu a3, a5, 1f + bgeu a7, a5, 1f - addx4 a4, a3, a4 + addx4 a4, a7, a4 l32i a4, a4, 0 movi a5, sys_ni_syscall; beq a4, a5, 1f @@ -1881,6 +1889,10 @@ ENTRY(system_call) 1: /* regs->areg[2] = return_value */ s32i a6, a2, PT_AREG2 + bnez a3, 1f + retw + +1: mov a6, a2 call4 do_syscall_trace_leave retw diff --git a/arch/xtensa/kernel/ptrace.c b/arch/xtensa/kernel/ptrace.c index 86622d4db328..f73a6a71323e 100644 --- a/arch/xtensa/kernel/ptrace.c +++ b/arch/xtensa/kernel/ptrace.c @@ -487,13 +487,12 @@ long arch_ptrace(struct task_struct *child, long request, return ret; } -unsigned long do_syscall_trace_enter(struct pt_regs *regs) +void do_syscall_trace_enter(struct pt_regs *regs) { if (test_thread_flag(TIF_SYSCALL_TRACE) && tracehook_report_syscall_entry(regs)) - return NO_SYSCALL; + regs->syscall = NO_SYSCALL; - return regs->areg[2]; } void do_syscall_trace_leave(struct pt_regs *regs) From 06fbac8e8971f2fa526e189304dd95ee62f39dbe Mon Sep 17 00:00:00 2001 From: Max Filippov Date: Fri, 9 Nov 2018 19:32:06 -0800 Subject: [PATCH 20/25] xtensa: implement task_user_regset_view - define struct user_pt_regs in the arch/xtensa/include/uapi/asm/ptrace.h with the same layout as xtensa_gregset_t; make xtensa_gregset_t a typedef; - define REGSET_GPR regset, implement register get and set functions; - define task_user_regset_view function and expose REGSET_GPR. Signed-off-by: Max Filippov --- arch/xtensa/include/asm/elf.h | 14 +-- arch/xtensa/include/uapi/asm/ptrace.h | 18 +++ arch/xtensa/kernel/ptrace.c | 175 ++++++++++++++++---------- 3 files changed, 128 insertions(+), 79 deletions(-) diff --git a/arch/xtensa/include/asm/elf.h b/arch/xtensa/include/asm/elf.h index f3291b110a0d..c30c73eea267 100644 --- a/arch/xtensa/include/asm/elf.h +++ b/arch/xtensa/include/asm/elf.h @@ -75,19 +75,7 @@ typedef unsigned long elf_greg_t; -typedef struct { - elf_greg_t pc; - elf_greg_t ps; - elf_greg_t lbeg; - elf_greg_t lend; - elf_greg_t lcount; - elf_greg_t sar; - elf_greg_t windowstart; - elf_greg_t windowbase; - elf_greg_t threadptr; - elf_greg_t reserved[7+48]; - elf_greg_t a[64]; -} xtensa_gregset_t; +typedef struct user_pt_regs xtensa_gregset_t; #define ELF_NGREG (sizeof(xtensa_gregset_t) / sizeof(elf_greg_t)) diff --git a/arch/xtensa/include/uapi/asm/ptrace.h b/arch/xtensa/include/uapi/asm/ptrace.h index a10b42963703..2ec0f9100a06 100644 --- a/arch/xtensa/include/uapi/asm/ptrace.h +++ b/arch/xtensa/include/uapi/asm/ptrace.h @@ -12,6 +12,8 @@ #ifndef _UAPI_XTENSA_PTRACE_H #define _UAPI_XTENSA_PTRACE_H +#include + /* Registers used by strace */ #define REG_A_BASE 0x0000 @@ -36,5 +38,21 @@ #define PTRACE_GETHBPREGS 20 #define PTRACE_SETHBPREGS 21 +#ifndef __ASSEMBLY__ +struct user_pt_regs { + __u32 pc; + __u32 ps; + __u32 lbeg; + __u32 lend; + __u32 lcount; + __u32 sar; + __u32 windowstart; + __u32 windowbase; + __u32 threadptr; + __u32 reserved[7 + 48]; + __u32 a[64]; +}; + +#endif #endif /* _UAPI_XTENSA_PTRACE_H */ diff --git a/arch/xtensa/kernel/ptrace.c b/arch/xtensa/kernel/ptrace.c index f73a6a71323e..ce751b1af7b3 100644 --- a/arch/xtensa/kernel/ptrace.c +++ b/arch/xtensa/kernel/ptrace.c @@ -18,6 +18,7 @@ #include #include #include +#include #include #include #include @@ -32,6 +33,110 @@ #include #include +static int gpr_get(struct task_struct *target, + const struct user_regset *regset, + unsigned int pos, unsigned int count, + void *kbuf, void __user *ubuf) +{ + struct pt_regs *regs = task_pt_regs(target); + struct user_pt_regs newregs = { + .pc = regs->pc, + .ps = regs->ps & ~(1 << PS_EXCM_BIT), + .lbeg = regs->lbeg, + .lend = regs->lend, + .lcount = regs->lcount, + .sar = regs->sar, + .threadptr = regs->threadptr, + .windowbase = regs->windowbase, + .windowstart = regs->windowstart, + }; + + memcpy(newregs.a, + regs->areg + XCHAL_NUM_AREGS - regs->windowbase * 4, + regs->windowbase * 16); + memcpy(newregs.a + regs->windowbase * 4, + regs->areg, + (WSBITS - regs->windowbase) * 16); + + return user_regset_copyout(&pos, &count, &kbuf, &ubuf, + &newregs, 0, -1); +} + +static int gpr_set(struct task_struct *target, + const struct user_regset *regset, + unsigned int pos, unsigned int count, + const void *kbuf, const void __user *ubuf) +{ + int ret; + struct user_pt_regs newregs = {0}; + struct pt_regs *regs; + const u32 ps_mask = PS_CALLINC_MASK | PS_OWB_MASK; + + ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &newregs, 0, -1); + if (ret) + return ret; + + if (newregs.windowbase >= XCHAL_NUM_AREGS / 4) + return -EINVAL; + + regs = task_pt_regs(target); + regs->pc = newregs.pc; + regs->ps = (regs->ps & ~ps_mask) | (newregs.ps & ps_mask); + regs->lbeg = newregs.lbeg; + regs->lend = newregs.lend; + regs->lcount = newregs.lcount; + regs->sar = newregs.sar; + regs->threadptr = newregs.threadptr; + + if (newregs.windowbase != regs->windowbase || + newregs.windowstart != regs->windowstart) { + u32 rotws, wmask; + + rotws = (((newregs.windowstart | + (newregs.windowstart << WSBITS)) >> + newregs.windowbase) & + ((1 << WSBITS) - 1)) & ~1; + wmask = ((rotws ? WSBITS + 1 - ffs(rotws) : 0) << 4) | + (rotws & 0xF) | 1; + regs->windowbase = newregs.windowbase; + regs->windowstart = newregs.windowstart; + regs->wmask = wmask; + } + + memcpy(regs->areg + XCHAL_NUM_AREGS - newregs.windowbase * 4, + newregs.a, newregs.windowbase * 16); + memcpy(regs->areg, newregs.a + newregs.windowbase * 4, + (WSBITS - newregs.windowbase) * 16); + + return 0; +} + +enum xtensa_regset { + REGSET_GPR, +}; + +static const struct user_regset xtensa_regsets[] = { + [REGSET_GPR] = { + .core_note_type = NT_PRSTATUS, + .n = sizeof(struct user_pt_regs) / sizeof(u32), + .size = sizeof(u32), + .align = sizeof(u32), + .get = gpr_get, + .set = gpr_set + }, +}; + +static const struct user_regset_view user_xtensa_view = { + .name = "xtensa", + .e_machine = EM_XTENSA, + .regsets = xtensa_regsets, + .n = ARRAY_SIZE(xtensa_regsets) +}; + +const struct user_regset_view *task_user_regset_view(struct task_struct *task) +{ + return &user_xtensa_view; +} void user_enable_single_step(struct task_struct *child) { @@ -54,76 +159,14 @@ void ptrace_disable(struct task_struct *child) static int ptrace_getregs(struct task_struct *child, void __user *uregs) { - struct pt_regs *regs = task_pt_regs(child); - xtensa_gregset_t __user *gregset = uregs; - unsigned long wb = regs->windowbase; - int i; - - if (!access_ok(VERIFY_WRITE, uregs, sizeof(xtensa_gregset_t))) - return -EIO; - - __put_user(regs->pc, &gregset->pc); - __put_user(regs->ps & ~(1 << PS_EXCM_BIT), &gregset->ps); - __put_user(regs->lbeg, &gregset->lbeg); - __put_user(regs->lend, &gregset->lend); - __put_user(regs->lcount, &gregset->lcount); - __put_user(regs->windowstart, &gregset->windowstart); - __put_user(regs->windowbase, &gregset->windowbase); - __put_user(regs->threadptr, &gregset->threadptr); - - for (i = 0; i < XCHAL_NUM_AREGS; i++) - __put_user(regs->areg[i], - gregset->a + ((wb * 4 + i) % XCHAL_NUM_AREGS)); - - return 0; + return copy_regset_to_user(child, &user_xtensa_view, REGSET_GPR, + 0, sizeof(xtensa_gregset_t), uregs); } static int ptrace_setregs(struct task_struct *child, void __user *uregs) { - struct pt_regs *regs = task_pt_regs(child); - xtensa_gregset_t *gregset = uregs; - const unsigned long ps_mask = PS_CALLINC_MASK | PS_OWB_MASK; - unsigned long ps; - unsigned long wb, ws; - - if (!access_ok(VERIFY_WRITE, uregs, sizeof(xtensa_gregset_t))) - return -EIO; - - __get_user(regs->pc, &gregset->pc); - __get_user(ps, &gregset->ps); - __get_user(regs->lbeg, &gregset->lbeg); - __get_user(regs->lend, &gregset->lend); - __get_user(regs->lcount, &gregset->lcount); - __get_user(ws, &gregset->windowstart); - __get_user(wb, &gregset->windowbase); - __get_user(regs->threadptr, &gregset->threadptr); - - regs->ps = (regs->ps & ~ps_mask) | (ps & ps_mask) | (1 << PS_EXCM_BIT); - - if (wb >= XCHAL_NUM_AREGS / 4) - return -EFAULT; - - if (wb != regs->windowbase || ws != regs->windowstart) { - unsigned long rotws, wmask; - - rotws = (((ws | (ws << WSBITS)) >> wb) & - ((1 << WSBITS) - 1)) & ~1; - wmask = ((rotws ? WSBITS + 1 - ffs(rotws) : 0) << 4) | - (rotws & 0xF) | 1; - regs->windowbase = wb; - regs->windowstart = ws; - regs->wmask = wmask; - } - - if (wb != 0 && __copy_from_user(regs->areg + XCHAL_NUM_AREGS - wb * 4, - gregset->a, wb * 16)) - return -EFAULT; - - if (__copy_from_user(regs->areg, gregset->a + wb * 4, - (WSBITS - wb) * 16)) - return -EFAULT; - - return 0; + return copy_regset_from_user(child, &user_xtensa_view, REGSET_GPR, + 0, sizeof(xtensa_gregset_t), uregs); } From 1819afcc0b1327a470898e0a76100884969aff17 Mon Sep 17 00:00:00 2001 From: Max Filippov Date: Sat, 24 Nov 2018 21:36:11 -0800 Subject: [PATCH 21/25] xtensa: implement TIE regset Put all coprocessors and non-coprocessor TIE state into the REGSET_TIE. Mark TIE regset with NT_PRFPREG note type. Reimplement ptrace_getxregs and ptrace_setxregs using REGSET_TIE. Signed-off-by: Max Filippov --- arch/xtensa/kernel/ptrace.c | 165 +++++++++++++++++++----------------- 1 file changed, 87 insertions(+), 78 deletions(-) diff --git a/arch/xtensa/kernel/ptrace.c b/arch/xtensa/kernel/ptrace.c index ce751b1af7b3..207aa272b48c 100644 --- a/arch/xtensa/kernel/ptrace.c +++ b/arch/xtensa/kernel/ptrace.c @@ -111,8 +111,82 @@ static int gpr_set(struct task_struct *target, return 0; } +static int tie_get(struct task_struct *target, + const struct user_regset *regset, + unsigned int pos, unsigned int count, + void *kbuf, void __user *ubuf) +{ + int ret; + struct pt_regs *regs = task_pt_regs(target); + struct thread_info *ti = task_thread_info(target); + elf_xtregs_t *newregs = kzalloc(sizeof(elf_xtregs_t), GFP_KERNEL); + + if (!newregs) + return -ENOMEM; + + newregs->opt = regs->xtregs_opt; + newregs->user = ti->xtregs_user; + +#if XTENSA_HAVE_COPROCESSORS + /* Flush all coprocessor registers to memory. */ + coprocessor_flush_all(ti); + newregs->cp0 = ti->xtregs_cp.cp0; + newregs->cp1 = ti->xtregs_cp.cp1; + newregs->cp2 = ti->xtregs_cp.cp2; + newregs->cp3 = ti->xtregs_cp.cp3; + newregs->cp4 = ti->xtregs_cp.cp4; + newregs->cp5 = ti->xtregs_cp.cp5; + newregs->cp6 = ti->xtregs_cp.cp6; + newregs->cp7 = ti->xtregs_cp.cp7; +#endif + ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, + newregs, 0, -1); + kfree(newregs); + return ret; +} + +static int tie_set(struct task_struct *target, + const struct user_regset *regset, + unsigned int pos, unsigned int count, + const void *kbuf, const void __user *ubuf) +{ + int ret; + struct pt_regs *regs = task_pt_regs(target); + struct thread_info *ti = task_thread_info(target); + elf_xtregs_t *newregs = kzalloc(sizeof(elf_xtregs_t), GFP_KERNEL); + + if (!newregs) + return -ENOMEM; + + ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, + newregs, 0, -1); + + if (ret) + goto exit; + regs->xtregs_opt = newregs->opt; + ti->xtregs_user = newregs->user; + +#if XTENSA_HAVE_COPROCESSORS + /* Flush all coprocessors before we overwrite them. */ + coprocessor_flush_all(ti); + coprocessor_release_all(ti); + ti->xtregs_cp.cp0 = newregs->cp0; + ti->xtregs_cp.cp1 = newregs->cp1; + ti->xtregs_cp.cp2 = newregs->cp2; + ti->xtregs_cp.cp3 = newregs->cp3; + ti->xtregs_cp.cp4 = newregs->cp4; + ti->xtregs_cp.cp5 = newregs->cp5; + ti->xtregs_cp.cp6 = newregs->cp6; + ti->xtregs_cp.cp7 = newregs->cp7; +#endif +exit: + kfree(newregs); + return ret; +} + enum xtensa_regset { REGSET_GPR, + REGSET_TIE, }; static const struct user_regset xtensa_regsets[] = { @@ -122,7 +196,15 @@ static const struct user_regset xtensa_regsets[] = { .size = sizeof(u32), .align = sizeof(u32), .get = gpr_get, - .set = gpr_set + .set = gpr_set, + }, + [REGSET_TIE] = { + .core_note_type = NT_PRFPREG, + .n = sizeof(elf_xtregs_t) / sizeof(u32), + .size = sizeof(u32), + .align = sizeof(u32), + .get = tie_get, + .set = tie_set, }, }; @@ -169,89 +251,16 @@ static int ptrace_setregs(struct task_struct *child, void __user *uregs) 0, sizeof(xtensa_gregset_t), uregs); } - -#if XTENSA_HAVE_COPROCESSORS -#define CP_OFFSETS(cp) \ - { \ - .elf_xtregs_offset = offsetof(elf_xtregs_t, cp), \ - .ti_offset = offsetof(struct thread_info, xtregs_cp.cp), \ - .sz = sizeof(xtregs_ ## cp ## _t), \ - } - -static const struct { - size_t elf_xtregs_offset; - size_t ti_offset; - size_t sz; -} cp_offsets[] = { - CP_OFFSETS(cp0), - CP_OFFSETS(cp1), - CP_OFFSETS(cp2), - CP_OFFSETS(cp3), - CP_OFFSETS(cp4), - CP_OFFSETS(cp5), - CP_OFFSETS(cp6), - CP_OFFSETS(cp7), -}; -#endif - static int ptrace_getxregs(struct task_struct *child, void __user *uregs) { - struct pt_regs *regs = task_pt_regs(child); - struct thread_info *ti = task_thread_info(child); - elf_xtregs_t __user *xtregs = uregs; - int ret = 0; - int i __maybe_unused; - - if (!access_ok(VERIFY_WRITE, uregs, sizeof(elf_xtregs_t))) - return -EIO; - -#if XTENSA_HAVE_COPROCESSORS - /* Flush all coprocessor registers to memory. */ - coprocessor_flush_all(ti); - - for (i = 0; i < ARRAY_SIZE(cp_offsets); ++i) - ret |= __copy_to_user((char __user *)xtregs + - cp_offsets[i].elf_xtregs_offset, - (const char *)ti + - cp_offsets[i].ti_offset, - cp_offsets[i].sz); -#endif - ret |= __copy_to_user(&xtregs->opt, ®s->xtregs_opt, - sizeof(xtregs->opt)); - ret |= __copy_to_user(&xtregs->user,&ti->xtregs_user, - sizeof(xtregs->user)); - - return ret ? -EFAULT : 0; + return copy_regset_to_user(child, &user_xtensa_view, REGSET_TIE, + 0, sizeof(elf_xtregs_t), uregs); } static int ptrace_setxregs(struct task_struct *child, void __user *uregs) { - struct thread_info *ti = task_thread_info(child); - struct pt_regs *regs = task_pt_regs(child); - elf_xtregs_t *xtregs = uregs; - int ret = 0; - int i __maybe_unused; - - if (!access_ok(VERIFY_READ, uregs, sizeof(elf_xtregs_t))) - return -EFAULT; - -#if XTENSA_HAVE_COPROCESSORS - /* Flush all coprocessors before we overwrite them. */ - coprocessor_flush_all(ti); - coprocessor_release_all(ti); - - for (i = 0; i < ARRAY_SIZE(cp_offsets); ++i) - ret |= __copy_from_user((char *)ti + cp_offsets[i].ti_offset, - (const char __user *)xtregs + - cp_offsets[i].elf_xtregs_offset, - cp_offsets[i].sz); -#endif - ret |= __copy_from_user(®s->xtregs_opt, &xtregs->opt, - sizeof(xtregs->opt)); - ret |= __copy_from_user(&ti->xtregs_user, &xtregs->user, - sizeof(xtregs->user)); - - return ret ? -EFAULT : 0; + return copy_regset_from_user(child, &user_xtensa_view, REGSET_TIE, + 0, sizeof(elf_xtregs_t), uregs); } static int ptrace_peekusr(struct task_struct *child, long regno, From 921534473a6bc2ff822f19c222970d213d2e0f76 Mon Sep 17 00:00:00 2001 From: Max Filippov Date: Tue, 20 Nov 2018 20:09:58 -0800 Subject: [PATCH 22/25] xtensa: enable CORE_DUMP_USE_REGSET Drop xtensa_elf_core_copy_regs function, ELF_CORE_COPY_REGS macro, and dump_fpu function. Define CORE_DUMP_USE_REGSET to make ELF core dumper use regset interface. Signed-off-by: Max Filippov --- arch/xtensa/include/asm/elf.h | 6 +---- arch/xtensa/kernel/process.c | 46 ----------------------------------- 2 files changed, 1 insertion(+), 51 deletions(-) diff --git a/arch/xtensa/include/asm/elf.h b/arch/xtensa/include/asm/elf.h index c30c73eea267..909a6ab4f22b 100644 --- a/arch/xtensa/include/asm/elf.h +++ b/arch/xtensa/include/asm/elf.h @@ -86,11 +86,6 @@ typedef elf_greg_t elf_gregset_t[ELF_NGREG]; typedef unsigned int elf_fpreg_t; typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG]; -#define ELF_CORE_COPY_REGS(_eregs, _pregs) \ - xtensa_elf_core_copy_regs ((xtensa_gregset_t*)&(_eregs), _pregs); - -extern void xtensa_elf_core_copy_regs (xtensa_gregset_t *, struct pt_regs *); - /* * This is used to ensure we don't load something for the wrong architecture. */ @@ -114,6 +109,7 @@ extern void xtensa_elf_core_copy_regs (xtensa_gregset_t *, struct pt_regs *); #define ELF_ARCH EM_XTENSA #define ELF_EXEC_PAGESIZE PAGE_SIZE +#define CORE_DUMP_USE_REGSET /* * This is the location that an ET_DYN program is loaded if exec'ed. Typical diff --git a/arch/xtensa/kernel/process.c b/arch/xtensa/kernel/process.c index 27be75e88ed3..74969a437a37 100644 --- a/arch/xtensa/kernel/process.c +++ b/arch/xtensa/kernel/process.c @@ -326,49 +326,3 @@ unsigned long get_wchan(struct task_struct *p) } while (count++ < 16); return 0; } - -/* - * xtensa_gregset_t and 'struct pt_regs' are vastly different formats - * of processor registers. Besides different ordering, - * xtensa_gregset_t contains non-live register information that - * 'struct pt_regs' does not. Exception handling (primarily) uses - * 'struct pt_regs'. Core files and ptrace use xtensa_gregset_t. - * - */ - -void xtensa_elf_core_copy_regs (xtensa_gregset_t *elfregs, struct pt_regs *regs) -{ - unsigned long wb, ws, wm; - int live, last; - - wb = regs->windowbase; - ws = regs->windowstart; - wm = regs->wmask; - ws = ((ws >> wb) | (ws << (WSBITS - wb))) & ((1 << WSBITS) - 1); - - /* Don't leak any random bits. */ - - memset(elfregs, 0, sizeof(*elfregs)); - - /* Note: PS.EXCM is not set while user task is running; its - * being set in regs->ps is for exception handling convenience. - */ - - elfregs->pc = regs->pc; - elfregs->ps = (regs->ps & ~(1 << PS_EXCM_BIT)); - elfregs->lbeg = regs->lbeg; - elfregs->lend = regs->lend; - elfregs->lcount = regs->lcount; - elfregs->sar = regs->sar; - elfregs->windowstart = ws; - - live = (wm & 2) ? 4 : (wm & 4) ? 8 : (wm & 8) ? 12 : 16; - last = XCHAL_NUM_AREGS - (wm >> 4) * 4; - memcpy(elfregs->a, regs->areg, live * 4); - memcpy(elfregs->a + last, regs->areg + last, (wm >> 4) * 16); -} - -int dump_fpu(void) -{ - return 0; -} From 9f24f3c1067c8e4ffbbcd759180b422c9a761b1b Mon Sep 17 00:00:00 2001 From: Max Filippov Date: Fri, 9 Nov 2018 15:45:53 -0800 Subject: [PATCH 23/25] xtensa: implement tracehook functions and enable HAVE_ARCH_TRACEHOOK Implement syscall_get_nr, syscall_rollback, syscall_get_error, syscall_{get,set}_return_value and syscall_{get,set}_arguments. Select HAVE_ARCH_TRACEHOOK as Xtensa now has all support for that. Signed-off-by: Max Filippov --- arch/xtensa/Kconfig | 1 + arch/xtensa/include/asm/syscall.h | 80 ++++++++++++++++++++++++++++++- 2 files changed, 80 insertions(+), 1 deletion(-) diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig index d29b7365da8d..55d13b589ff3 100644 --- a/arch/xtensa/Kconfig +++ b/arch/xtensa/Kconfig @@ -18,6 +18,7 @@ config XTENSA select GENERIC_SCHED_CLOCK select GENERIC_STRNCPY_FROM_USER if KASAN select HAVE_ARCH_KASAN if MMU + select HAVE_ARCH_TRACEHOOK select HAVE_DEBUG_KMEMLEAK select HAVE_DMA_CONTIGUOUS select HAVE_EXIT_THREAD diff --git a/arch/xtensa/include/asm/syscall.h b/arch/xtensa/include/asm/syscall.h index 6969956d3f93..e47470ec8ea8 100644 --- a/arch/xtensa/include/asm/syscall.h +++ b/arch/xtensa/include/asm/syscall.h @@ -10,6 +10,8 @@ #ifndef _ASM_SYSCALL_H #define _ASM_SYSCALL_H +#include +#include #include static inline int syscall_get_arch(void) @@ -17,7 +19,83 @@ static inline int syscall_get_arch(void) return AUDIT_ARCH_XTENSA; } -struct pt_regs; +static inline long syscall_get_nr(struct task_struct *task, + struct pt_regs *regs) +{ + return regs->syscall; +} + +static inline void syscall_rollback(struct task_struct *task, + struct pt_regs *regs) +{ + /* Do nothing. */ +} + +static inline long syscall_get_error(struct task_struct *task, + struct pt_regs *regs) +{ + /* 0 if syscall succeeded, otherwise -Errorcode */ + return IS_ERR_VALUE(regs->areg[2]) ? regs->areg[2] : 0; +} + +static inline long syscall_get_return_value(struct task_struct *task, + struct pt_regs *regs) +{ + return regs->areg[2]; +} + +static inline void syscall_set_return_value(struct task_struct *task, + struct pt_regs *regs, + int error, long val) +{ + regs->areg[0] = (long) error ? error : val; +} + +#define SYSCALL_MAX_ARGS 6 +#define XTENSA_SYSCALL_ARGUMENT_REGS {6, 3, 4, 5, 8, 9} + +static inline void syscall_get_arguments(struct task_struct *task, + struct pt_regs *regs, + unsigned int i, unsigned int n, + unsigned long *args) +{ + static const unsigned int reg[] = XTENSA_SYSCALL_ARGUMENT_REGS; + unsigned int j; + + if (n == 0) + return; + + WARN_ON_ONCE(i + n > SYSCALL_MAX_ARGS); + + for (j = 0; j < n; ++j) { + if (i + j < SYSCALL_MAX_ARGS) + args[j] = regs->areg[reg[i + j]]; + else + args[j] = 0; + } +} + +static inline void syscall_set_arguments(struct task_struct *task, + struct pt_regs *regs, + unsigned int i, unsigned int n, + const unsigned long *args) +{ + static const unsigned int reg[] = XTENSA_SYSCALL_ARGUMENT_REGS; + unsigned int j; + + if (n == 0) + return; + + if (WARN_ON_ONCE(i + n > SYSCALL_MAX_ARGS)) { + if (i < SYSCALL_MAX_ARGS) + n = SYSCALL_MAX_ARGS - i; + else + return; + } + + for (j = 0; j < n; ++j) + regs->areg[reg[i + j]] = args[j]; +} asmlinkage long xtensa_rt_sigreturn(struct pt_regs*); asmlinkage long xtensa_shmat(int, char __user *, int); From af5395c214c15c18de3decf2229373a8c88c4fde Mon Sep 17 00:00:00 2001 From: Max Filippov Date: Sun, 11 Nov 2018 21:51:49 -0800 Subject: [PATCH 24/25] xtensa: implement syscall tracepoints Add TIF_SYSCALL_TRACEPOINT flag definition; add _TIF_SYSCALL_TRACEPOINT to _TIF_WORK_MASK. Call trace_sys_enter from do_syscall_trace_enter and trace_sys_exit from do_syscall_trace_leave when TIF_SYSCALL_TRACEPOINT flag is set. Add declaration of sys_call_table to arch/xtensa/include/asm/syscall.h Add definition of NR_syscalls to arch/xtensa/include/asm/unistd.h Select HAVE_SYSCALL_TRACEPOINTS. This change allows tracing each syscall entry and exit through the ftrace mechanism. Signed-off-by: Max Filippov --- arch/xtensa/Kconfig | 1 + arch/xtensa/include/asm/ptrace.h | 5 +++++ arch/xtensa/include/asm/syscall.h | 3 +++ arch/xtensa/include/asm/thread_info.h | 5 ++++- arch/xtensa/include/asm/unistd.h | 2 ++ arch/xtensa/kernel/ptrace.c | 8 ++++++++ arch/xtensa/kernel/syscall.c | 2 -- 7 files changed, 23 insertions(+), 3 deletions(-) diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig index 55d13b589ff3..5a27a6fd3a1c 100644 --- a/arch/xtensa/Kconfig +++ b/arch/xtensa/Kconfig @@ -29,6 +29,7 @@ config XTENSA select HAVE_OPROFILE select HAVE_PERF_EVENTS select HAVE_STACKPROTECTOR + select HAVE_SYSCALL_TRACEPOINTS select IRQ_DOMAIN select MODULES_USE_ELF_RELA select PERF_USE_VMALLOC diff --git a/arch/xtensa/include/asm/ptrace.h b/arch/xtensa/include/asm/ptrace.h index f1b1de526d1d..62a58d2567e9 100644 --- a/arch/xtensa/include/asm/ptrace.h +++ b/arch/xtensa/include/asm/ptrace.h @@ -102,6 +102,11 @@ struct pt_regs { #define user_stack_pointer(regs) ((regs)->areg[1]) +static inline unsigned long regs_return_value(struct pt_regs *regs) +{ + return regs->areg[2]; +} + #else /* __ASSEMBLY__ */ # include diff --git a/arch/xtensa/include/asm/syscall.h b/arch/xtensa/include/asm/syscall.h index e47470ec8ea8..a168bf81c7f4 100644 --- a/arch/xtensa/include/asm/syscall.h +++ b/arch/xtensa/include/asm/syscall.h @@ -19,6 +19,9 @@ static inline int syscall_get_arch(void) return AUDIT_ARCH_XTENSA; } +typedef void (*syscall_t)(void); +extern syscall_t sys_call_table[]; + static inline long syscall_get_nr(struct task_struct *task, struct pt_regs *regs) { diff --git a/arch/xtensa/include/asm/thread_info.h b/arch/xtensa/include/asm/thread_info.h index c823dddfebdf..f333f10a7650 100644 --- a/arch/xtensa/include/asm/thread_info.h +++ b/arch/xtensa/include/asm/thread_info.h @@ -106,6 +106,7 @@ static inline struct thread_info *current_thread_info(void) #define TIF_SIGPENDING 1 /* signal pending */ #define TIF_NEED_RESCHED 2 /* rescheduling necessary */ #define TIF_SINGLESTEP 3 /* restore singlestep on return to user mode */ +#define TIF_SYSCALL_TRACEPOINT 4 /* syscall tracepoint instrumentation */ #define TIF_MEMDIE 5 /* is terminating due to OOM killer */ #define TIF_RESTORE_SIGMASK 6 /* restore signal mask in do_signal() */ #define TIF_NOTIFY_RESUME 7 /* callback before returning to user */ @@ -115,8 +116,10 @@ static inline struct thread_info *current_thread_info(void) #define _TIF_SIGPENDING (1< #include +#define CREATE_TRACE_POINTS +#include + #include #include #include @@ -545,12 +548,17 @@ void do_syscall_trace_enter(struct pt_regs *regs) tracehook_report_syscall_entry(regs)) regs->syscall = NO_SYSCALL; + if (test_thread_flag(TIF_SYSCALL_TRACEPOINT)) + trace_sys_enter(regs, syscall_get_nr(current, regs)); } void do_syscall_trace_leave(struct pt_regs *regs) { int step; + if (test_thread_flag(TIF_SYSCALL_TRACEPOINT)) + trace_sys_exit(regs, regs_return_value(regs)); + step = test_thread_flag(TIF_SINGLESTEP); if (step || test_thread_flag(TIF_SYSCALL_TRACE)) diff --git a/arch/xtensa/kernel/syscall.c b/arch/xtensa/kernel/syscall.c index b8240e08f1f1..2c415fce6801 100644 --- a/arch/xtensa/kernel/syscall.c +++ b/arch/xtensa/kernel/syscall.c @@ -28,8 +28,6 @@ #include #include -typedef void (*syscall_t)(void); - syscall_t sys_call_table[__NR_syscalls] /* FIXME __cacheline_aligned */= { [0 ... __NR_syscalls - 1] = (syscall_t)&sys_ni_syscall, From 64711f9a47d4defa90417f5e8db8ed0060bc3275 Mon Sep 17 00:00:00 2001 From: Max Filippov Date: Wed, 19 Dec 2018 19:48:37 -0800 Subject: [PATCH 25/25] xtensa: implement jump_label support Use 3-byte 'nop' and 'j' instructions that are always present. Don't let assembler mark a spot right after patchable 'j' instruction as unreachable and later put literals or padding bytes there. Add separate implementations of patch_text for SMP and UP cases, avoiding use of atomics on UP. Signed-off-by: Max Filippov --- .../core/jump-labels/arch-support.txt | 2 +- arch/xtensa/Kconfig | 1 + arch/xtensa/include/asm/jump_label.h | 65 ++++++++++++ arch/xtensa/kernel/Makefile | 1 + arch/xtensa/kernel/jump_label.c | 99 +++++++++++++++++++ 5 files changed, 167 insertions(+), 1 deletion(-) create mode 100644 arch/xtensa/include/asm/jump_label.h create mode 100644 arch/xtensa/kernel/jump_label.c diff --git a/Documentation/features/core/jump-labels/arch-support.txt b/Documentation/features/core/jump-labels/arch-support.txt index 27cbd63abfd2..60111395f932 100644 --- a/Documentation/features/core/jump-labels/arch-support.txt +++ b/Documentation/features/core/jump-labels/arch-support.txt @@ -29,5 +29,5 @@ | um: | TODO | | unicore32: | TODO | | x86: | ok | - | xtensa: | TODO | + | xtensa: | ok | ----------------------- diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig index 5a27a6fd3a1c..92eb80140e7f 100644 --- a/arch/xtensa/Kconfig +++ b/arch/xtensa/Kconfig @@ -17,6 +17,7 @@ config XTENSA select GENERIC_PCI_IOMAP select GENERIC_SCHED_CLOCK select GENERIC_STRNCPY_FROM_USER if KASAN + select HAVE_ARCH_JUMP_LABEL select HAVE_ARCH_KASAN if MMU select HAVE_ARCH_TRACEHOOK select HAVE_DEBUG_KMEMLEAK diff --git a/arch/xtensa/include/asm/jump_label.h b/arch/xtensa/include/asm/jump_label.h new file mode 100644 index 000000000000..c812bf85021c --- /dev/null +++ b/arch/xtensa/include/asm/jump_label.h @@ -0,0 +1,65 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (C) 2018 Cadence Design Systems Inc. */ + +#ifndef _ASM_XTENSA_JUMP_LABEL_H +#define _ASM_XTENSA_JUMP_LABEL_H + +#ifndef __ASSEMBLY__ + +#include + +#define JUMP_LABEL_NOP_SIZE 3 + +static __always_inline bool arch_static_branch(struct static_key *key, + bool branch) +{ + asm_volatile_goto("1:\n\t" + "_nop\n\t" + ".pushsection __jump_table, \"aw\"\n\t" + ".word 1b, %l[l_yes], %c0\n\t" + ".popsection\n\t" + : : "i" (&((char *)key)[branch]) : : l_yes); + + return false; +l_yes: + return true; +} + +static __always_inline bool arch_static_branch_jump(struct static_key *key, + bool branch) +{ + /* + * Xtensa assembler will mark certain points in the code + * as unreachable, so that later assembler or linker relaxation + * passes could use them. A spot right after the J instruction + * is one such point. Assembler and/or linker may insert padding + * or literals here, breaking code flow in case the J instruction + * is later replaced with NOP. Put a label right after the J to + * make it reachable and wrap both into a no-transform block + * to avoid any assembler interference with this. + */ + asm_volatile_goto("1:\n\t" + ".begin no-transform\n\t" + "_j %l[l_yes]\n\t" + "2:\n\t" + ".end no-transform\n\t" + ".pushsection __jump_table, \"aw\"\n\t" + ".word 1b, %l[l_yes], %c0\n\t" + ".popsection\n\t" + : : "i" (&((char *)key)[branch]) : : l_yes); + + return false; +l_yes: + return true; +} + +typedef u32 jump_label_t; + +struct jump_entry { + jump_label_t code; + jump_label_t target; + jump_label_t key; +}; + +#endif /* __ASSEMBLY__ */ +#endif diff --git a/arch/xtensa/kernel/Makefile b/arch/xtensa/kernel/Makefile index 8dff506caf07..6f629027ac7d 100644 --- a/arch/xtensa/kernel/Makefile +++ b/arch/xtensa/kernel/Makefile @@ -16,6 +16,7 @@ obj-$(CONFIG_SMP) += smp.o mxhead.o obj-$(CONFIG_XTENSA_VARIANT_HAVE_PERF_EVENTS) += perf_event.o obj-$(CONFIG_HAVE_HW_BREAKPOINT) += hw_breakpoint.o obj-$(CONFIG_S32C1I_SELFTEST) += s32c1i_selftest.o +obj-$(CONFIG_JUMP_LABEL) += jump_label.o # In the Xtensa architecture, assembly generates literals which must always # precede the L32R instruction with a relative offset less than 256 kB. diff --git a/arch/xtensa/kernel/jump_label.c b/arch/xtensa/kernel/jump_label.c new file mode 100644 index 000000000000..d108f721c116 --- /dev/null +++ b/arch/xtensa/kernel/jump_label.c @@ -0,0 +1,99 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2018 Cadence Design Systems Inc. + +#include +#include +#include +#include +#include +#include + +#include + +#ifdef HAVE_JUMP_LABEL + +#define J_OFFSET_MASK 0x0003ffff +#define J_SIGN_MASK (~(J_OFFSET_MASK >> 1)) + +#if defined(__XTENSA_EL__) +#define J_INSN 0x6 +#define NOP_INSN 0x0020f0 +#elif defined(__XTENSA_EB__) +#define J_INSN 0x60000000 +#define NOP_INSN 0x0f020000 +#else +#error Unsupported endianness. +#endif + +struct patch { + atomic_t cpu_count; + unsigned long addr; + size_t sz; + const void *data; +}; + +static void local_patch_text(unsigned long addr, const void *data, size_t sz) +{ + memcpy((void *)addr, data, sz); + local_flush_icache_range(addr, addr + sz); +} + +static int patch_text_stop_machine(void *data) +{ + struct patch *patch = data; + + if (atomic_inc_return(&patch->cpu_count) == 1) { + local_patch_text(patch->addr, patch->data, patch->sz); + atomic_inc(&patch->cpu_count); + } else { + while (atomic_read(&patch->cpu_count) <= num_online_cpus()) + cpu_relax(); + __invalidate_icache_range(patch->addr, patch->sz); + } + return 0; +} + +static void patch_text(unsigned long addr, const void *data, size_t sz) +{ + if (IS_ENABLED(CONFIG_SMP)) { + struct patch patch = { + .cpu_count = ATOMIC_INIT(0), + .addr = addr, + .sz = sz, + .data = data, + }; + stop_machine_cpuslocked(patch_text_stop_machine, + &patch, NULL); + } else { + unsigned long flags; + + local_irq_save(flags); + local_patch_text(addr, data, sz); + local_irq_restore(flags); + } +} + +void arch_jump_label_transform(struct jump_entry *e, + enum jump_label_type type) +{ + u32 d = (jump_entry_target(e) - (jump_entry_code(e) + 4)); + u32 insn; + + /* Jump only works within 128K of the J instruction. */ + BUG_ON(!((d & J_SIGN_MASK) == 0 || + (d & J_SIGN_MASK) == J_SIGN_MASK)); + + if (type == JUMP_LABEL_JMP) { +#if defined(__XTENSA_EL__) + insn = ((d & J_OFFSET_MASK) << 6) | J_INSN; +#elif defined(__XTENSA_EB__) + insn = ((d & J_OFFSET_MASK) << 8) | J_INSN; +#endif + } else { + insn = NOP_INSN; + } + + patch_text(jump_entry_code(e), &insn, JUMP_LABEL_NOP_SIZE); +} + +#endif /* HAVE_JUMP_LABEL */