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xemu/target/i386/hvf
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Paolo Bonzini 7cac7aa704 target/i386/hvf: fix handling of XSAVE-related CPUID bits 
The call to xgetbv() is passing the ecx value for cpuid function 0xD,
index 0. The xgetbv call thus returns false (OSXSAVE is bit 27, which is
well out of the range of CPUID[0xD,0].ECX) and eax is not modified. While
fixing it, cache the whole computation of supported XCR0 bits since it
will be used for more than just CPUID leaf 0xD.

Furthermore, unsupported subleafs of CPUID 0xD (including all those
corresponding to zero bits in host's XCR0) must be hidden; if OSXSAVE
is not set at all, the whole of CPUID leaf 0xD plus the XSAVE bit must
be hidden.

Finally, unconditionally drop XSTATE_BNDREGS_MASK and XSTATE_BNDCSR_MASK;
real hardware will only show them if the MPX bit is set in CPUID;
this is never the case for hvf_get_supported_cpuid() because QEMU's
Hypervisor.framework support does not handle the VMX fields related to
MPX (even in the unlikely possibility that the host has MPX enabled).
So hide those bits in the new cache_host_xcr0().

Cc: Phil Dennis-Jordan <lists@philjordan.eu>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
 		2024-10-31 18:28:32 +01:00
..
README.md system/cpus: rename qemu_mutex_lock_iothread() to bql_lock() 2024-01-08 10:45:43 -05:00
hvf-cpu.c sysemu/kvm: Restrict hvf_get_supported_cpuid() to x86 targets 2023-10-07 19:02:32 +02:00
hvf-i386.h sysemu/kvm: Restrict hvf_get_supported_cpuid() to x86 targets 2023-10-07 19:02:32 +02:00
hvf.c hvf: Split up hv_vm_create logic per arch 2024-09-13 15:31:46 +01:00
meson.build meson: Replace softmmu_ss -> system_ss 2023-06-20 10:01:30 +02:00
panic.h x86 hvf cpus: Fix Lesser GPL version number 2020-11-15 16:45:27 +01:00
vmcs.h hvf: Enable RDTSCP support 2022-07-13 00:05:39 +02:00
vmx.h i386/hvf: Fixes some compilation warnings 2024-06-08 10:33:38 +02:00
x86.c target/i386/hvf: Use CPUState typedef 2024-03-12 12:03:58 +01:00
x86.h target/i386/hvf: Use CPUState typedef 2024-03-12 12:03:58 +01:00
x86_cpuid.c target/i386/hvf: fix handling of XSAVE-related CPUID bits 2024-10-31 18:28:32 +01:00
x86_decode.c i386/hvf: Fixes some compilation warnings 2024-06-08 10:33:38 +02:00
x86_decode.h x86 hvf cpus: Fix Lesser GPL version number 2020-11-15 16:45:27 +01:00
x86_descr.c target/i386/hvf: Use CPUState typedef 2024-03-12 12:03:58 +01:00
x86_descr.h target/i386/hvf: Use CPUState typedef 2024-03-12 12:03:58 +01:00
x86_emu.c i386/hvf: Fixes some compilation warnings 2024-06-08 10:33:38 +02:00
x86_emu.h target/i386/hvf: Use CPUState typedef 2024-03-12 12:03:58 +01:00
x86_flags.c Remove qemu-common.h include from most units 2022-04-06 14:31:55 +02:00
x86_flags.h x86 hvf cpus: Fix Lesser GPL version number 2020-11-15 16:45:27 +01:00
x86_mmu.c target/i386/hvf: Use CPUState typedef 2024-03-12 12:03:58 +01:00
x86_mmu.h target/i386/hvf: Use CPUState typedef 2024-03-12 12:03:58 +01:00
x86_task.c accel: Rename HVF 'struct hvf_vcpu_state' -> AccelCPUState 2023-06-28 14:14:22 +02:00
x86_task.h Clean up header guards that don't match their file name 2019-05-13 08:58:55 +02:00
x86hvf.c accel/hvf: Use accel-specific per-vcpu @dirty field 2024-04-26 17:03:00 +02:00
x86hvf.h accel: Rename 'cpu_state' -> 'cs' 2023-06-28 13:55:35 +02:00

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 bql_lock.