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qemu/target/i386/hvf
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Roman Bolshakov b4e1af8961 i386: hvf: Fix register refs if REX is present 
According to Intel(R)64 and IA-32 Architectures Software Developer's
Manual, the following one-byte registers should be fetched when REX
prefix is present (sorted by reg encoding index):
AL, CL, DL, BL, SPL, BPL, SIL, DIL, R8L - R15L

The first 8 are fetched if REX.R is zero, the last 8 if non-zero.

The following registers should be fetched for instructions without REX
prefix (also sorted by reg encoding index):
AL, CL, DL, BL, AH, CH, DH, BH

Current emulation code doesn't handle accesses to SPL, BPL, SIL, DIL
when REX is present, thefore an instruction 40883e "mov %dil,(%rsi)" is
decoded as "mov %bh,(%rsi)".

That caused an infinite loop in vp_reset:
https://lists.gnu.org/archive/html/qemu-devel/2018-10/msg03293.html

Signed-off-by: Roman Bolshakov <r.bolshakov@yadro.com>
Message-Id: <20181018134401.44471-1-r.bolshakov@yadro.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
 		2018-10-19 13:44:12 +02:00
..
Makefile.objs
…
README.md i386: Compile CPUX86State xsave_buf only when support KVM or HVF 2018-10-02 19:09:12 +02:00
hvf-i386.h
…
hvf.c hvf: drop unused variable 2018-10-02 19:09:13 +02:00
panic.h i386: hvf: cleanup x86_gen.h 2017-12-22 15:02:07 +01:00
vmcs.h
…
vmx.h Clean up includes 2018-02-09 05:05:11 +01:00
x86.c i386: hvf: remove addr_t 2017-12-22 15:02:07 +01:00
x86.h i386: hvf: cleanup x86_gen.h 2017-12-22 15:02:07 +01:00
x86_cpuid.c i386: hvf: remove addr_t 2017-12-22 15:02:07 +01:00
x86_decode.c i386: hvf: Fix register refs if REX is present 2018-10-19 13:44:12 +02:00
x86_decode.h i386: hvf: Fix register refs if REX is present 2018-10-19 13:44:12 +02:00
x86_descr.c i386: hvf: unify register enums between HVF and the rest 2017-12-22 15:02:07 +01:00
x86_descr.h i386: hvf: unify register enums between HVF and the rest 2017-12-22 15:02:07 +01:00
x86_emu.c i386: hvf: cleanup x86_gen.h 2017-12-22 15:02:07 +01:00
x86_emu.h i386: hvf: remove addr_t 2017-12-22 15:02:07 +01:00
x86_flags.c i386: hvf: cleanup x86_gen.h 2017-12-22 15:02:07 +01:00
x86_flags.h i386: hvf: cleanup x86_gen.h 2017-12-22 15:02:07 +01:00
x86_mmu.c Drop unneeded system header includes 2018-02-10 10:07:40 +03:00
x86_mmu.h i386: hvf: cleanup x86_gen.h 2017-12-22 15:02:07 +01:00
x86_task.c target: Do not include "exec/exec-all.h" if it is not necessary 2018-06-01 14:15:10 +02:00
x86_task.h
…
x86hvf.c i386: Compile CPUX86State xsave_buf only when support KVM or HVF 2018-10-02 19:09:12 +02:00
x86hvf.h
…

README.md

OS X Hypervisor.framework support in QEMU

These sources (and ../hvf-all.c) are adapted from Veertu Inc's vdhh (Veertu Desktop Hosted Hypervisor) (last known location: https://github.com/veertuinc/vdhh) with some minor changes, the most significant of which were:

  1. Adapt to our current QEMU's CPUState structure and address_space_rw API; many struct members have been moved around (emulated x86 state, xsave_buf) due to historical differences + QEMU needing to handle more emulation targets.
  2. Removal of apic_page and hyperv-related functionality.
  3. More relaxed use of qemu_mutex_lock_iothread.