On 08.11.23 12:17, Nicolas Saenz Julienne wrote:
Let user-space handle HVCALL_GET_VP_REGISTERS and
HVCALL_SET_VP_REGISTERS through the KVM_EXIT_HYPERV_HVCALL exit reason.
Additionally, expose the cpuid bit.
Signed-off-by: Nicolas Saenz Julienne <nsaenz@xxxxxxxxxx>
---
arch/x86/kvm/hyperv.c | 9 +++++++++
include/asm-generic/hyperv-tlfs.h | 1 +
2 files changed, 10 insertions(+)
diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
index caaa859932c5..a3970d52eef1 100644
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c
@@ -2456,6 +2456,9 @@ static void kvm_hv_write_xmm(struct kvm_hyperv_xmm_reg *xmm)
static bool kvm_hv_is_xmm_output_hcall(u16 code)
{
+ if (code == HVCALL_GET_VP_REGISTERS)
+ return true;
+
return false;
}
@@ -2520,6 +2523,8 @@ static bool is_xmm_fast_hypercall(struct kvm_hv_hcall *hc)
case HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX:
case HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX:
case HVCALL_SEND_IPI_EX:
+ case HVCALL_GET_VP_REGISTERS:
+ case HVCALL_SET_VP_REGISTERS:
return true;
}
@@ -2738,6 +2743,9 @@ int kvm_hv_hypercall(struct kvm_vcpu *vcpu)
break;
}
goto hypercall_userspace_exit;
+ case HVCALL_GET_VP_REGISTERS:
+ case HVCALL_SET_VP_REGISTERS:
+ goto hypercall_userspace_exit;
default:
ret = HV_STATUS_INVALID_HYPERCALL_CODE;
break;
@@ -2903,6 +2911,7 @@ int kvm_get_hv_cpuid(struct kvm_vcpu *vcpu, struct kvm_cpuid2 *cpuid,
ent->ebx |= HV_POST_MESSAGES;
ent->ebx |= HV_SIGNAL_EVENTS;
ent->ebx |= HV_ENABLE_EXTENDED_HYPERCALLS;
+ ent->ebx |= HV_ACCESS_VP_REGISTERS;
Do we need to guard this?
Alex
Amazon Development Center Germany GmbH
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