Adds the CPUID trap for CPUID 0x40000000, sending the WHPX signature to the guest upon request. This is consistent with other QEMU accelerators (KVM).
Signed-off-by: Alessandro Pilotti <apilo...@cloudbasesolutions.com> --- target/i386/whpx-all.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/target/i386/whpx-all.c b/target/i386/whpx-all.c index efa1441479..4085002428 100644 --- a/target/i386/whpx-all.c +++ b/target/i386/whpx-all.c @@ -29,6 +29,8 @@ #include <WinHvPlatform.h> #include <WinHvEmulation.h> +#define WHPX_CPUID_SIGNATURE 0x40000000 + struct whpx_state { uint64_t mem_quota; WHV_PARTITION_HANDLE partition; @@ -918,6 +920,7 @@ static int whpx_vcpu_run(CPUState *cpu) WHV_REGISTER_NAME reg_names[5]; UINT32 reg_count = 5; UINT64 rip, rax, rcx, rdx, rbx; + UINT32 signature[3] = {0}; rip = vcpu->exit_ctx.VpContext.Rip + vcpu->exit_ctx.VpContext.InstructionLength; @@ -932,6 +935,13 @@ static int whpx_vcpu_run(CPUState *cpu) rdx = vcpu->exit_ctx.CpuidAccess.DefaultResultRdx; rbx = vcpu->exit_ctx.CpuidAccess.DefaultResultRbx; break; + case WHPX_CPUID_SIGNATURE: + memcpy(signature, "WHPXWHPXWHPX", 12); + rax = vcpu->exit_ctx.CpuidAccess.DefaultResultRax; + rbx = signature[0]; + rcx = signature[1]; + rdx = signature[2]; + break; default: rax = vcpu->exit_ctx.CpuidAccess.DefaultResultRax; rcx = vcpu->exit_ctx.CpuidAccess.DefaultResultRcx; @@ -1338,7 +1348,7 @@ static int whpx_accel_init(MachineState *ms) goto error; } - UINT32 cpuidExitList[] = {1}; + UINT32 cpuidExitList[] = {1, WHPX_CPUID_SIGNATURE}; hr = WHvSetPartitionProperty(whpx->partition, WHvPartitionPropertyCodeCpuidExitList, cpuidExitList, -- 2.13.2