mirror of https://gitee.com/openkylin/linux.git
788 lines
24 KiB
C
788 lines
24 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2001 Ben. Herrenschmidt (benh@kernel.crashing.org)
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*
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* Modifications for ppc64:
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* Copyright (C) 2003 Dave Engebretsen <engebret@us.ibm.com>
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*
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* Copyright 2008 Michael Ellerman, IBM Corporation.
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*/
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#include <linux/types.h>
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#include <linux/jump_label.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/init.h>
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#include <linux/sched/mm.h>
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#include <asm/cputable.h>
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#include <asm/code-patching.h>
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#include <asm/page.h>
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#include <asm/sections.h>
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#include <asm/setup.h>
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#include <asm/security_features.h>
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#include <asm/firmware.h>
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#include <asm/inst.h>
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struct fixup_entry {
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unsigned long mask;
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unsigned long value;
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long start_off;
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long end_off;
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long alt_start_off;
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long alt_end_off;
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};
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static struct ppc_inst *calc_addr(struct fixup_entry *fcur, long offset)
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{
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/*
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* We store the offset to the code as a negative offset from
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* the start of the alt_entry, to support the VDSO. This
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* routine converts that back into an actual address.
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*/
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return (struct ppc_inst *)((unsigned long)fcur + offset);
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}
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static int patch_alt_instruction(struct ppc_inst *src, struct ppc_inst *dest,
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struct ppc_inst *alt_start, struct ppc_inst *alt_end)
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{
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int err;
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struct ppc_inst instr;
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instr = ppc_inst_read(src);
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if (instr_is_relative_branch(*src)) {
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struct ppc_inst *target = (struct ppc_inst *)branch_target(src);
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/* Branch within the section doesn't need translating */
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if (target < alt_start || target > alt_end) {
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err = translate_branch(&instr, dest, src);
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if (err)
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return 1;
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}
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}
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raw_patch_instruction(dest, instr);
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return 0;
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}
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static int patch_feature_section(unsigned long value, struct fixup_entry *fcur)
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{
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struct ppc_inst *start, *end, *alt_start, *alt_end, *src, *dest, nop;
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start = calc_addr(fcur, fcur->start_off);
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end = calc_addr(fcur, fcur->end_off);
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alt_start = calc_addr(fcur, fcur->alt_start_off);
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alt_end = calc_addr(fcur, fcur->alt_end_off);
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if ((alt_end - alt_start) > (end - start))
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return 1;
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if ((value & fcur->mask) == fcur->value)
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return 0;
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src = alt_start;
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dest = start;
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for (; src < alt_end; src = ppc_inst_next(src, src),
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dest = ppc_inst_next(dest, dest)) {
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if (patch_alt_instruction(src, dest, alt_start, alt_end))
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return 1;
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}
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nop = ppc_inst(PPC_INST_NOP);
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for (; dest < end; dest = ppc_inst_next(dest, &nop))
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raw_patch_instruction(dest, nop);
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return 0;
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}
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void do_feature_fixups(unsigned long value, void *fixup_start, void *fixup_end)
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{
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struct fixup_entry *fcur, *fend;
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fcur = fixup_start;
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fend = fixup_end;
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for (; fcur < fend; fcur++) {
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if (patch_feature_section(value, fcur)) {
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WARN_ON(1);
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printk("Unable to patch feature section at %p - %p" \
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" with %p - %p\n",
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calc_addr(fcur, fcur->start_off),
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calc_addr(fcur, fcur->end_off),
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calc_addr(fcur, fcur->alt_start_off),
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calc_addr(fcur, fcur->alt_end_off));
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}
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}
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}
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#ifdef CONFIG_PPC_BOOK3S_64
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static void do_stf_entry_barrier_fixups(enum stf_barrier_type types)
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{
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unsigned int instrs[3], *dest;
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long *start, *end;
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int i;
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start = PTRRELOC(&__start___stf_entry_barrier_fixup),
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end = PTRRELOC(&__stop___stf_entry_barrier_fixup);
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instrs[0] = 0x60000000; /* nop */
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instrs[1] = 0x60000000; /* nop */
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instrs[2] = 0x60000000; /* nop */
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i = 0;
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if (types & STF_BARRIER_FALLBACK) {
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instrs[i++] = 0x7d4802a6; /* mflr r10 */
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instrs[i++] = 0x60000000; /* branch patched below */
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instrs[i++] = 0x7d4803a6; /* mtlr r10 */
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} else if (types & STF_BARRIER_EIEIO) {
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instrs[i++] = 0x7e0006ac; /* eieio + bit 6 hint */
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} else if (types & STF_BARRIER_SYNC_ORI) {
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instrs[i++] = 0x7c0004ac; /* hwsync */
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instrs[i++] = 0xe94d0000; /* ld r10,0(r13) */
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instrs[i++] = 0x63ff0000; /* ori 31,31,0 speculation barrier */
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}
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for (i = 0; start < end; start++, i++) {
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dest = (void *)start + *start;
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pr_devel("patching dest %lx\n", (unsigned long)dest);
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patch_instruction((struct ppc_inst *)dest, ppc_inst(instrs[0]));
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if (types & STF_BARRIER_FALLBACK)
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patch_branch((struct ppc_inst *)(dest + 1),
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(unsigned long)&stf_barrier_fallback,
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BRANCH_SET_LINK);
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else
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patch_instruction((struct ppc_inst *)(dest + 1),
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ppc_inst(instrs[1]));
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patch_instruction((struct ppc_inst *)(dest + 2), ppc_inst(instrs[2]));
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}
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printk(KERN_DEBUG "stf-barrier: patched %d entry locations (%s barrier)\n", i,
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(types == STF_BARRIER_NONE) ? "no" :
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(types == STF_BARRIER_FALLBACK) ? "fallback" :
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(types == STF_BARRIER_EIEIO) ? "eieio" :
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(types == (STF_BARRIER_SYNC_ORI)) ? "hwsync"
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: "unknown");
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}
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static void do_stf_exit_barrier_fixups(enum stf_barrier_type types)
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{
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unsigned int instrs[6], *dest;
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long *start, *end;
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int i;
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start = PTRRELOC(&__start___stf_exit_barrier_fixup),
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end = PTRRELOC(&__stop___stf_exit_barrier_fixup);
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instrs[0] = 0x60000000; /* nop */
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instrs[1] = 0x60000000; /* nop */
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instrs[2] = 0x60000000; /* nop */
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instrs[3] = 0x60000000; /* nop */
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instrs[4] = 0x60000000; /* nop */
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instrs[5] = 0x60000000; /* nop */
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i = 0;
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if (types & STF_BARRIER_FALLBACK || types & STF_BARRIER_SYNC_ORI) {
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if (cpu_has_feature(CPU_FTR_HVMODE)) {
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instrs[i++] = 0x7db14ba6; /* mtspr 0x131, r13 (HSPRG1) */
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instrs[i++] = 0x7db04aa6; /* mfspr r13, 0x130 (HSPRG0) */
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} else {
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instrs[i++] = 0x7db243a6; /* mtsprg 2,r13 */
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instrs[i++] = 0x7db142a6; /* mfsprg r13,1 */
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}
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instrs[i++] = 0x7c0004ac; /* hwsync */
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instrs[i++] = 0xe9ad0000; /* ld r13,0(r13) */
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instrs[i++] = 0x63ff0000; /* ori 31,31,0 speculation barrier */
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if (cpu_has_feature(CPU_FTR_HVMODE)) {
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instrs[i++] = 0x7db14aa6; /* mfspr r13, 0x131 (HSPRG1) */
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} else {
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instrs[i++] = 0x7db242a6; /* mfsprg r13,2 */
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}
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} else if (types & STF_BARRIER_EIEIO) {
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instrs[i++] = 0x7e0006ac; /* eieio + bit 6 hint */
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}
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for (i = 0; start < end; start++, i++) {
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dest = (void *)start + *start;
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pr_devel("patching dest %lx\n", (unsigned long)dest);
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patch_instruction((struct ppc_inst *)dest, ppc_inst(instrs[0]));
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patch_instruction((struct ppc_inst *)(dest + 1), ppc_inst(instrs[1]));
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patch_instruction((struct ppc_inst *)(dest + 2), ppc_inst(instrs[2]));
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patch_instruction((struct ppc_inst *)(dest + 3), ppc_inst(instrs[3]));
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patch_instruction((struct ppc_inst *)(dest + 4), ppc_inst(instrs[4]));
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patch_instruction((struct ppc_inst *)(dest + 5), ppc_inst(instrs[5]));
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}
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printk(KERN_DEBUG "stf-barrier: patched %d exit locations (%s barrier)\n", i,
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(types == STF_BARRIER_NONE) ? "no" :
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(types == STF_BARRIER_FALLBACK) ? "fallback" :
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(types == STF_BARRIER_EIEIO) ? "eieio" :
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(types == (STF_BARRIER_SYNC_ORI)) ? "hwsync"
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: "unknown");
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}
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void do_stf_barrier_fixups(enum stf_barrier_type types)
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{
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do_stf_entry_barrier_fixups(types);
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do_stf_exit_barrier_fixups(types);
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}
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void do_rfi_flush_fixups(enum l1d_flush_type types)
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{
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unsigned int instrs[3], *dest;
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long *start, *end;
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int i;
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start = PTRRELOC(&__start___rfi_flush_fixup),
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end = PTRRELOC(&__stop___rfi_flush_fixup);
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instrs[0] = 0x60000000; /* nop */
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instrs[1] = 0x60000000; /* nop */
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instrs[2] = 0x60000000; /* nop */
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if (types & L1D_FLUSH_FALLBACK)
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/* b .+16 to fallback flush */
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instrs[0] = 0x48000010;
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i = 0;
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if (types & L1D_FLUSH_ORI) {
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instrs[i++] = 0x63ff0000; /* ori 31,31,0 speculation barrier */
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instrs[i++] = 0x63de0000; /* ori 30,30,0 L1d flush*/
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}
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if (types & L1D_FLUSH_MTTRIG)
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instrs[i++] = 0x7c12dba6; /* mtspr TRIG2,r0 (SPR #882) */
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for (i = 0; start < end; start++, i++) {
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dest = (void *)start + *start;
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pr_devel("patching dest %lx\n", (unsigned long)dest);
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patch_instruction((struct ppc_inst *)dest, ppc_inst(instrs[0]));
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patch_instruction((struct ppc_inst *)(dest + 1), ppc_inst(instrs[1]));
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patch_instruction((struct ppc_inst *)(dest + 2), ppc_inst(instrs[2]));
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}
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printk(KERN_DEBUG "rfi-flush: patched %d locations (%s flush)\n", i,
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(types == L1D_FLUSH_NONE) ? "no" :
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(types == L1D_FLUSH_FALLBACK) ? "fallback displacement" :
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(types & L1D_FLUSH_ORI) ? (types & L1D_FLUSH_MTTRIG)
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? "ori+mttrig type"
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: "ori type" :
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(types & L1D_FLUSH_MTTRIG) ? "mttrig type"
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: "unknown");
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}
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void do_barrier_nospec_fixups_range(bool enable, void *fixup_start, void *fixup_end)
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{
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unsigned int instr, *dest;
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long *start, *end;
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int i;
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start = fixup_start;
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end = fixup_end;
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instr = 0x60000000; /* nop */
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if (enable) {
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pr_info("barrier-nospec: using ORI speculation barrier\n");
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instr = 0x63ff0000; /* ori 31,31,0 speculation barrier */
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}
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for (i = 0; start < end; start++, i++) {
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dest = (void *)start + *start;
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pr_devel("patching dest %lx\n", (unsigned long)dest);
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patch_instruction((struct ppc_inst *)dest, ppc_inst(instr));
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}
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printk(KERN_DEBUG "barrier-nospec: patched %d locations\n", i);
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}
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#endif /* CONFIG_PPC_BOOK3S_64 */
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#ifdef CONFIG_PPC_BARRIER_NOSPEC
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void do_barrier_nospec_fixups(bool enable)
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{
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void *start, *end;
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start = PTRRELOC(&__start___barrier_nospec_fixup),
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end = PTRRELOC(&__stop___barrier_nospec_fixup);
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do_barrier_nospec_fixups_range(enable, start, end);
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}
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#endif /* CONFIG_PPC_BARRIER_NOSPEC */
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#ifdef CONFIG_PPC_FSL_BOOK3E
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void do_barrier_nospec_fixups_range(bool enable, void *fixup_start, void *fixup_end)
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{
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unsigned int instr[2], *dest;
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long *start, *end;
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int i;
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start = fixup_start;
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end = fixup_end;
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instr[0] = PPC_INST_NOP;
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instr[1] = PPC_INST_NOP;
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if (enable) {
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pr_info("barrier-nospec: using isync; sync as speculation barrier\n");
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instr[0] = PPC_INST_ISYNC;
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instr[1] = PPC_INST_SYNC;
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}
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for (i = 0; start < end; start++, i++) {
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dest = (void *)start + *start;
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pr_devel("patching dest %lx\n", (unsigned long)dest);
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patch_instruction((struct ppc_inst *)dest, ppc_inst(instr[0]));
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patch_instruction((struct ppc_inst *)(dest + 1), ppc_inst(instr[1]));
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}
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printk(KERN_DEBUG "barrier-nospec: patched %d locations\n", i);
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}
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static void patch_btb_flush_section(long *curr)
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{
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unsigned int *start, *end;
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start = (void *)curr + *curr;
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end = (void *)curr + *(curr + 1);
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for (; start < end; start++) {
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pr_devel("patching dest %lx\n", (unsigned long)start);
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patch_instruction((struct ppc_inst *)start, ppc_inst(PPC_INST_NOP));
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}
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}
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void do_btb_flush_fixups(void)
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{
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long *start, *end;
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start = PTRRELOC(&__start__btb_flush_fixup);
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end = PTRRELOC(&__stop__btb_flush_fixup);
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for (; start < end; start += 2)
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patch_btb_flush_section(start);
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}
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#endif /* CONFIG_PPC_FSL_BOOK3E */
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void do_lwsync_fixups(unsigned long value, void *fixup_start, void *fixup_end)
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{
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long *start, *end;
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struct ppc_inst *dest;
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if (!(value & CPU_FTR_LWSYNC))
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return ;
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start = fixup_start;
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end = fixup_end;
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for (; start < end; start++) {
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dest = (void *)start + *start;
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raw_patch_instruction(dest, ppc_inst(PPC_INST_LWSYNC));
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}
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}
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static void do_final_fixups(void)
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{
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#if defined(CONFIG_PPC64) && defined(CONFIG_RELOCATABLE)
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struct ppc_inst inst, *src, *dest, *end;
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if (PHYSICAL_START == 0)
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return;
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src = (struct ppc_inst *)(KERNELBASE + PHYSICAL_START);
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dest = (struct ppc_inst *)KERNELBASE;
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end = (void *)src + (__end_interrupts - _stext);
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while (src < end) {
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inst = ppc_inst_read(src);
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raw_patch_instruction(dest, inst);
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src = ppc_inst_next(src, src);
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dest = ppc_inst_next(dest, dest);
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}
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#endif
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}
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static unsigned long __initdata saved_cpu_features;
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static unsigned int __initdata saved_mmu_features;
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#ifdef CONFIG_PPC64
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static unsigned long __initdata saved_firmware_features;
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#endif
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void __init apply_feature_fixups(void)
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{
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struct cpu_spec *spec = PTRRELOC(*PTRRELOC(&cur_cpu_spec));
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*PTRRELOC(&saved_cpu_features) = spec->cpu_features;
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*PTRRELOC(&saved_mmu_features) = spec->mmu_features;
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/*
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* Apply the CPU-specific and firmware specific fixups to kernel text
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* (nop out sections not relevant to this CPU or this firmware).
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*/
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do_feature_fixups(spec->cpu_features,
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PTRRELOC(&__start___ftr_fixup),
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PTRRELOC(&__stop___ftr_fixup));
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do_feature_fixups(spec->mmu_features,
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PTRRELOC(&__start___mmu_ftr_fixup),
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PTRRELOC(&__stop___mmu_ftr_fixup));
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do_lwsync_fixups(spec->cpu_features,
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PTRRELOC(&__start___lwsync_fixup),
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PTRRELOC(&__stop___lwsync_fixup));
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#ifdef CONFIG_PPC64
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saved_firmware_features = powerpc_firmware_features;
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do_feature_fixups(powerpc_firmware_features,
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&__start___fw_ftr_fixup, &__stop___fw_ftr_fixup);
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#endif
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do_final_fixups();
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}
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void __init setup_feature_keys(void)
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{
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/*
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* Initialise jump label. This causes all the cpu/mmu_has_feature()
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* checks to take on their correct polarity based on the current set of
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* CPU/MMU features.
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*/
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jump_label_init();
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cpu_feature_keys_init();
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mmu_feature_keys_init();
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}
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static int __init check_features(void)
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{
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WARN(saved_cpu_features != cur_cpu_spec->cpu_features,
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"CPU features changed after feature patching!\n");
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WARN(saved_mmu_features != cur_cpu_spec->mmu_features,
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"MMU features changed after feature patching!\n");
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#ifdef CONFIG_PPC64
|
|
WARN(saved_firmware_features != powerpc_firmware_features,
|
|
"Firmware features changed after feature patching!\n");
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
late_initcall(check_features);
|
|
|
|
#ifdef CONFIG_FTR_FIXUP_SELFTEST
|
|
|
|
#define check(x) \
|
|
if (!(x)) printk("feature-fixups: test failed at line %d\n", __LINE__);
|
|
|
|
/* This must be after the text it fixes up, vmlinux.lds.S enforces that atm */
|
|
static struct fixup_entry fixup;
|
|
|
|
static long calc_offset(struct fixup_entry *entry, unsigned int *p)
|
|
{
|
|
return (unsigned long)p - (unsigned long)entry;
|
|
}
|
|
|
|
static void test_basic_patching(void)
|
|
{
|
|
extern unsigned int ftr_fixup_test1[];
|
|
extern unsigned int end_ftr_fixup_test1[];
|
|
extern unsigned int ftr_fixup_test1_orig[];
|
|
extern unsigned int ftr_fixup_test1_expected[];
|
|
int size = 4 * (end_ftr_fixup_test1 - ftr_fixup_test1);
|
|
|
|
fixup.value = fixup.mask = 8;
|
|
fixup.start_off = calc_offset(&fixup, ftr_fixup_test1 + 1);
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|
fixup.end_off = calc_offset(&fixup, ftr_fixup_test1 + 2);
|
|
fixup.alt_start_off = fixup.alt_end_off = 0;
|
|
|
|
/* Sanity check */
|
|
check(memcmp(ftr_fixup_test1, ftr_fixup_test1_orig, size) == 0);
|
|
|
|
/* Check we don't patch if the value matches */
|
|
patch_feature_section(8, &fixup);
|
|
check(memcmp(ftr_fixup_test1, ftr_fixup_test1_orig, size) == 0);
|
|
|
|
/* Check we do patch if the value doesn't match */
|
|
patch_feature_section(0, &fixup);
|
|
check(memcmp(ftr_fixup_test1, ftr_fixup_test1_expected, size) == 0);
|
|
|
|
/* Check we do patch if the mask doesn't match */
|
|
memcpy(ftr_fixup_test1, ftr_fixup_test1_orig, size);
|
|
check(memcmp(ftr_fixup_test1, ftr_fixup_test1_orig, size) == 0);
|
|
patch_feature_section(~8, &fixup);
|
|
check(memcmp(ftr_fixup_test1, ftr_fixup_test1_expected, size) == 0);
|
|
}
|
|
|
|
static void test_alternative_patching(void)
|
|
{
|
|
extern unsigned int ftr_fixup_test2[];
|
|
extern unsigned int end_ftr_fixup_test2[];
|
|
extern unsigned int ftr_fixup_test2_orig[];
|
|
extern unsigned int ftr_fixup_test2_alt[];
|
|
extern unsigned int ftr_fixup_test2_expected[];
|
|
int size = 4 * (end_ftr_fixup_test2 - ftr_fixup_test2);
|
|
|
|
fixup.value = fixup.mask = 0xF;
|
|
fixup.start_off = calc_offset(&fixup, ftr_fixup_test2 + 1);
|
|
fixup.end_off = calc_offset(&fixup, ftr_fixup_test2 + 2);
|
|
fixup.alt_start_off = calc_offset(&fixup, ftr_fixup_test2_alt);
|
|
fixup.alt_end_off = calc_offset(&fixup, ftr_fixup_test2_alt + 1);
|
|
|
|
/* Sanity check */
|
|
check(memcmp(ftr_fixup_test2, ftr_fixup_test2_orig, size) == 0);
|
|
|
|
/* Check we don't patch if the value matches */
|
|
patch_feature_section(0xF, &fixup);
|
|
check(memcmp(ftr_fixup_test2, ftr_fixup_test2_orig, size) == 0);
|
|
|
|
/* Check we do patch if the value doesn't match */
|
|
patch_feature_section(0, &fixup);
|
|
check(memcmp(ftr_fixup_test2, ftr_fixup_test2_expected, size) == 0);
|
|
|
|
/* Check we do patch if the mask doesn't match */
|
|
memcpy(ftr_fixup_test2, ftr_fixup_test2_orig, size);
|
|
check(memcmp(ftr_fixup_test2, ftr_fixup_test2_orig, size) == 0);
|
|
patch_feature_section(~0xF, &fixup);
|
|
check(memcmp(ftr_fixup_test2, ftr_fixup_test2_expected, size) == 0);
|
|
}
|
|
|
|
static void test_alternative_case_too_big(void)
|
|
{
|
|
extern unsigned int ftr_fixup_test3[];
|
|
extern unsigned int end_ftr_fixup_test3[];
|
|
extern unsigned int ftr_fixup_test3_orig[];
|
|
extern unsigned int ftr_fixup_test3_alt[];
|
|
int size = 4 * (end_ftr_fixup_test3 - ftr_fixup_test3);
|
|
|
|
fixup.value = fixup.mask = 0xC;
|
|
fixup.start_off = calc_offset(&fixup, ftr_fixup_test3 + 1);
|
|
fixup.end_off = calc_offset(&fixup, ftr_fixup_test3 + 2);
|
|
fixup.alt_start_off = calc_offset(&fixup, ftr_fixup_test3_alt);
|
|
fixup.alt_end_off = calc_offset(&fixup, ftr_fixup_test3_alt + 2);
|
|
|
|
/* Sanity check */
|
|
check(memcmp(ftr_fixup_test3, ftr_fixup_test3_orig, size) == 0);
|
|
|
|
/* Expect nothing to be patched, and the error returned to us */
|
|
check(patch_feature_section(0xF, &fixup) == 1);
|
|
check(memcmp(ftr_fixup_test3, ftr_fixup_test3_orig, size) == 0);
|
|
check(patch_feature_section(0, &fixup) == 1);
|
|
check(memcmp(ftr_fixup_test3, ftr_fixup_test3_orig, size) == 0);
|
|
check(patch_feature_section(~0xF, &fixup) == 1);
|
|
check(memcmp(ftr_fixup_test3, ftr_fixup_test3_orig, size) == 0);
|
|
}
|
|
|
|
static void test_alternative_case_too_small(void)
|
|
{
|
|
extern unsigned int ftr_fixup_test4[];
|
|
extern unsigned int end_ftr_fixup_test4[];
|
|
extern unsigned int ftr_fixup_test4_orig[];
|
|
extern unsigned int ftr_fixup_test4_alt[];
|
|
extern unsigned int ftr_fixup_test4_expected[];
|
|
int size = 4 * (end_ftr_fixup_test4 - ftr_fixup_test4);
|
|
unsigned long flag;
|
|
|
|
/* Check a high-bit flag */
|
|
flag = 1UL << ((sizeof(unsigned long) - 1) * 8);
|
|
fixup.value = fixup.mask = flag;
|
|
fixup.start_off = calc_offset(&fixup, ftr_fixup_test4 + 1);
|
|
fixup.end_off = calc_offset(&fixup, ftr_fixup_test4 + 5);
|
|
fixup.alt_start_off = calc_offset(&fixup, ftr_fixup_test4_alt);
|
|
fixup.alt_end_off = calc_offset(&fixup, ftr_fixup_test4_alt + 2);
|
|
|
|
/* Sanity check */
|
|
check(memcmp(ftr_fixup_test4, ftr_fixup_test4_orig, size) == 0);
|
|
|
|
/* Check we don't patch if the value matches */
|
|
patch_feature_section(flag, &fixup);
|
|
check(memcmp(ftr_fixup_test4, ftr_fixup_test4_orig, size) == 0);
|
|
|
|
/* Check we do patch if the value doesn't match */
|
|
patch_feature_section(0, &fixup);
|
|
check(memcmp(ftr_fixup_test4, ftr_fixup_test4_expected, size) == 0);
|
|
|
|
/* Check we do patch if the mask doesn't match */
|
|
memcpy(ftr_fixup_test4, ftr_fixup_test4_orig, size);
|
|
check(memcmp(ftr_fixup_test4, ftr_fixup_test4_orig, size) == 0);
|
|
patch_feature_section(~flag, &fixup);
|
|
check(memcmp(ftr_fixup_test4, ftr_fixup_test4_expected, size) == 0);
|
|
}
|
|
|
|
static void test_alternative_case_with_branch(void)
|
|
{
|
|
extern unsigned int ftr_fixup_test5[];
|
|
extern unsigned int end_ftr_fixup_test5[];
|
|
extern unsigned int ftr_fixup_test5_expected[];
|
|
int size = 4 * (end_ftr_fixup_test5 - ftr_fixup_test5);
|
|
|
|
check(memcmp(ftr_fixup_test5, ftr_fixup_test5_expected, size) == 0);
|
|
}
|
|
|
|
static void test_alternative_case_with_external_branch(void)
|
|
{
|
|
extern unsigned int ftr_fixup_test6[];
|
|
extern unsigned int end_ftr_fixup_test6[];
|
|
extern unsigned int ftr_fixup_test6_expected[];
|
|
int size = 4 * (end_ftr_fixup_test6 - ftr_fixup_test6);
|
|
|
|
check(memcmp(ftr_fixup_test6, ftr_fixup_test6_expected, size) == 0);
|
|
}
|
|
|
|
static void test_alternative_case_with_branch_to_end(void)
|
|
{
|
|
extern unsigned int ftr_fixup_test7[];
|
|
extern unsigned int end_ftr_fixup_test7[];
|
|
extern unsigned int ftr_fixup_test7_expected[];
|
|
int size = 4 * (end_ftr_fixup_test7 - ftr_fixup_test7);
|
|
|
|
check(memcmp(ftr_fixup_test7, ftr_fixup_test7_expected, size) == 0);
|
|
}
|
|
|
|
static void test_cpu_macros(void)
|
|
{
|
|
extern u8 ftr_fixup_test_FTR_macros[];
|
|
extern u8 ftr_fixup_test_FTR_macros_expected[];
|
|
unsigned long size = ftr_fixup_test_FTR_macros_expected -
|
|
ftr_fixup_test_FTR_macros;
|
|
|
|
/* The fixups have already been done for us during boot */
|
|
check(memcmp(ftr_fixup_test_FTR_macros,
|
|
ftr_fixup_test_FTR_macros_expected, size) == 0);
|
|
}
|
|
|
|
static void test_fw_macros(void)
|
|
{
|
|
#ifdef CONFIG_PPC64
|
|
extern u8 ftr_fixup_test_FW_FTR_macros[];
|
|
extern u8 ftr_fixup_test_FW_FTR_macros_expected[];
|
|
unsigned long size = ftr_fixup_test_FW_FTR_macros_expected -
|
|
ftr_fixup_test_FW_FTR_macros;
|
|
|
|
/* The fixups have already been done for us during boot */
|
|
check(memcmp(ftr_fixup_test_FW_FTR_macros,
|
|
ftr_fixup_test_FW_FTR_macros_expected, size) == 0);
|
|
#endif
|
|
}
|
|
|
|
static void test_lwsync_macros(void)
|
|
{
|
|
extern u8 lwsync_fixup_test[];
|
|
extern u8 end_lwsync_fixup_test[];
|
|
extern u8 lwsync_fixup_test_expected_LWSYNC[];
|
|
extern u8 lwsync_fixup_test_expected_SYNC[];
|
|
unsigned long size = end_lwsync_fixup_test -
|
|
lwsync_fixup_test;
|
|
|
|
/* The fixups have already been done for us during boot */
|
|
if (cur_cpu_spec->cpu_features & CPU_FTR_LWSYNC) {
|
|
check(memcmp(lwsync_fixup_test,
|
|
lwsync_fixup_test_expected_LWSYNC, size) == 0);
|
|
} else {
|
|
check(memcmp(lwsync_fixup_test,
|
|
lwsync_fixup_test_expected_SYNC, size) == 0);
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_PPC64
|
|
static void __init test_prefix_patching(void)
|
|
{
|
|
extern unsigned int ftr_fixup_prefix1[];
|
|
extern unsigned int end_ftr_fixup_prefix1[];
|
|
extern unsigned int ftr_fixup_prefix1_orig[];
|
|
extern unsigned int ftr_fixup_prefix1_expected[];
|
|
int size = sizeof(unsigned int) * (end_ftr_fixup_prefix1 - ftr_fixup_prefix1);
|
|
|
|
fixup.value = fixup.mask = 8;
|
|
fixup.start_off = calc_offset(&fixup, ftr_fixup_prefix1 + 1);
|
|
fixup.end_off = calc_offset(&fixup, ftr_fixup_prefix1 + 3);
|
|
fixup.alt_start_off = fixup.alt_end_off = 0;
|
|
|
|
/* Sanity check */
|
|
check(memcmp(ftr_fixup_prefix1, ftr_fixup_prefix1_orig, size) == 0);
|
|
|
|
patch_feature_section(0, &fixup);
|
|
check(memcmp(ftr_fixup_prefix1, ftr_fixup_prefix1_expected, size) == 0);
|
|
check(memcmp(ftr_fixup_prefix1, ftr_fixup_prefix1_orig, size) != 0);
|
|
}
|
|
|
|
static void __init test_prefix_alt_patching(void)
|
|
{
|
|
extern unsigned int ftr_fixup_prefix2[];
|
|
extern unsigned int end_ftr_fixup_prefix2[];
|
|
extern unsigned int ftr_fixup_prefix2_orig[];
|
|
extern unsigned int ftr_fixup_prefix2_expected[];
|
|
extern unsigned int ftr_fixup_prefix2_alt[];
|
|
int size = sizeof(unsigned int) * (end_ftr_fixup_prefix2 - ftr_fixup_prefix2);
|
|
|
|
fixup.value = fixup.mask = 8;
|
|
fixup.start_off = calc_offset(&fixup, ftr_fixup_prefix2 + 1);
|
|
fixup.end_off = calc_offset(&fixup, ftr_fixup_prefix2 + 3);
|
|
fixup.alt_start_off = calc_offset(&fixup, ftr_fixup_prefix2_alt);
|
|
fixup.alt_end_off = calc_offset(&fixup, ftr_fixup_prefix2_alt + 2);
|
|
/* Sanity check */
|
|
check(memcmp(ftr_fixup_prefix2, ftr_fixup_prefix2_orig, size) == 0);
|
|
|
|
patch_feature_section(0, &fixup);
|
|
check(memcmp(ftr_fixup_prefix2, ftr_fixup_prefix2_expected, size) == 0);
|
|
check(memcmp(ftr_fixup_prefix2, ftr_fixup_prefix2_orig, size) != 0);
|
|
}
|
|
|
|
static void __init test_prefix_word_alt_patching(void)
|
|
{
|
|
extern unsigned int ftr_fixup_prefix3[];
|
|
extern unsigned int end_ftr_fixup_prefix3[];
|
|
extern unsigned int ftr_fixup_prefix3_orig[];
|
|
extern unsigned int ftr_fixup_prefix3_expected[];
|
|
extern unsigned int ftr_fixup_prefix3_alt[];
|
|
int size = sizeof(unsigned int) * (end_ftr_fixup_prefix3 - ftr_fixup_prefix3);
|
|
|
|
fixup.value = fixup.mask = 8;
|
|
fixup.start_off = calc_offset(&fixup, ftr_fixup_prefix3 + 1);
|
|
fixup.end_off = calc_offset(&fixup, ftr_fixup_prefix3 + 4);
|
|
fixup.alt_start_off = calc_offset(&fixup, ftr_fixup_prefix3_alt);
|
|
fixup.alt_end_off = calc_offset(&fixup, ftr_fixup_prefix3_alt + 3);
|
|
/* Sanity check */
|
|
check(memcmp(ftr_fixup_prefix3, ftr_fixup_prefix3_orig, size) == 0);
|
|
|
|
patch_feature_section(0, &fixup);
|
|
check(memcmp(ftr_fixup_prefix3, ftr_fixup_prefix3_expected, size) == 0);
|
|
patch_feature_section(0, &fixup);
|
|
check(memcmp(ftr_fixup_prefix3, ftr_fixup_prefix3_orig, size) != 0);
|
|
}
|
|
#else
|
|
static inline void test_prefix_patching(void) {}
|
|
static inline void test_prefix_alt_patching(void) {}
|
|
static inline void test_prefix_word_alt_patching(void) {}
|
|
#endif /* CONFIG_PPC64 */
|
|
|
|
static int __init test_feature_fixups(void)
|
|
{
|
|
printk(KERN_DEBUG "Running feature fixup self-tests ...\n");
|
|
|
|
test_basic_patching();
|
|
test_alternative_patching();
|
|
test_alternative_case_too_big();
|
|
test_alternative_case_too_small();
|
|
test_alternative_case_with_branch();
|
|
test_alternative_case_with_external_branch();
|
|
test_alternative_case_with_branch_to_end();
|
|
test_cpu_macros();
|
|
test_fw_macros();
|
|
test_lwsync_macros();
|
|
test_prefix_patching();
|
|
test_prefix_alt_patching();
|
|
test_prefix_word_alt_patching();
|
|
|
|
return 0;
|
|
}
|
|
late_initcall(test_feature_fixups);
|
|
|
|
#endif /* CONFIG_FTR_FIXUP_SELFTEST */
|