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qemu/target/i386/hvf
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Roman Bolshakov b8d864f643 i386: hvf: Set env->eip in macvm_set_rip() 
cpu_synchronize_state() is currently no-op for hvf but BIOS will hang in
vAPIC option ROM when cpu_synchronize_state() is wired to
hvf_cpu_synchronize_state().

cpu_synchronize_state() state is called from vapic_write() during option
ROM initialization. It sets dirty flag on the cpu. macvm_set_rip() is
then invoked to advance IP after the I/O write to vAPIC port.

macvm_set_rip() only modifies VMCS, it doesn't change env->eip.
Therefore on the next iteration of vCPU loop, vcpu_dirty flag is checked
and hvf_put_registers() overwrites correct RIP in VMCS with the value of
env->eip that points to the I/O write instruction. Execution of the CPU
gets stuck on the instruction.

The issue can be avoided if eip doesn't contain stale value when dirty
flag is set on cpu.

Cc: Cameron Esfahani <dirty@apple.com>
Signed-off-by: Roman Bolshakov <r.bolshakov@yadro.com>
Message-Id: <20200630102824.77604-2-r.bolshakov@yadro.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-07-10 18:02:18 -04:00
..
hvf-i386.h i386: hvf: Move HVFState definition into hvf 2020-06-12 11:12:45 -04:00
hvf.c i386: hvf: Drop HVFX86EmulatorState 2020-06-12 11:20:12 -04:00
Makefile.objs i386: hvf: move all hvf files in the same directory 2017-12-22 15:02:05 +01:00
panic.h i386: hvf: cleanup x86_gen.h 2017-12-22 15:02:07 +01:00
README.md i386: Compile CPUX86State xsave_buf only when support KVM or HVF 2018-10-02 19:09:12 +02:00
vmcs.h Clean up ill-advised or unusual header guards 2019-05-13 08:58:55 +02:00
vmx.h i386: hvf: Set env->eip in macvm_set_rip() 2020-07-10 18:02:18 -04:00
x86.c i386: hvf: Drop copy of RFLAGS defines 2020-06-12 11:15:02 -04:00
x86.h i386: hvf: Drop HVFX86EmulatorState 2020-06-12 11:20:12 -04:00
x86_cpuid.c target/i386: drop the duplicated definition of cpuid AVX512_VBMI macro 2019-10-15 18:34:44 -03:00
x86_decode.c i386: hvf: Drop copy of RFLAGS defines 2020-06-12 11:15:02 -04:00
x86_decode.h hvf: correctly handle REX prefix in relation to legacy prefixes 2019-11-26 09:58:36 +01:00
x86_descr.c i386: hvf: unify register enums between HVF and the rest 2017-12-22 15:02:07 +01:00
x86_descr.h Normalize header guard symbol definition. 2019-05-13 08:58:55 +02:00
x86_emu.c i386: hvf: Move mmio_buf into CPUX86State 2020-06-12 11:20:09 -04:00
x86_emu.h Clean up ill-advised or unusual header guards 2019-05-13 08:58:55 +02:00
x86_flags.c i386: hvf: Move lazy_flags into CPUX86State 2020-06-12 11:19:37 -04:00
x86_flags.h Clean up ill-advised or unusual header guards 2019-05-13 08:58:55 +02:00
x86_mmu.c Avoid address_space_rw() with a constant is_write argument 2020-02-20 14:47:08 +01:00
x86_mmu.h Clean up ill-advised or unusual header guards 2019-05-13 08:58:55 +02:00
x86_task.c i386: hvf: Drop copy of RFLAGS defines 2020-06-12 11:15:02 -04:00
x86_task.h Clean up header guards that don't match their file name 2019-05-13 08:58:55 +02:00
x86hvf.c i386: hvf: Drop rflags from HVFX86EmulatorState 2020-06-12 11:15:02 -04:00
x86hvf.h i386: hvf: move all hvf files in the same directory 2017-12-22 15:02:05 +01:00

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.