Re: [RFC 11/33] KVM: x86: hyper-v: Handle GET/SET_VP_REGISTER hcall in user-space

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 




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
Krausenstr. 38
10117 Berlin
Geschaeftsfuehrung: Christian Schlaeger, Jonathan Weiss
Eingetragen am Amtsgericht Charlottenburg unter HRB 149173 B
Sitz: Berlin
Ust-ID: DE 289 237 879






[Index of Archives]     [KVM ARM]     [KVM ia64]     [KVM ppc]     [Virtualization Tools]     [Spice Development]     [Libvirt]     [Libvirt Users]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite Questions]     [Linux Kernel]     [Linux SCSI]     [XFree86]

  Powered by Linux