diff mbox series

[v5,3/4] KVM: arm64: Report all the KVM/arm64-specific hypercalls

Message ID 20250124151732.6072-4-shameerali.kolothum.thodi@huawei.com (mailing list archive)
State New
Headers show
Series KVM: arm64: Errata management for VM Live migration | expand

Commit Message

Shameer Kolothum Jan. 24, 2025, 3:17 p.m. UTC 
Currently ARM_SMCCC_VENDOR_HYP_KVM_FEATURES_FUNC_ID returns the
bitmap corresponding to KVM_REG_ARM_VENDOR_HYP_BMAP and it only
returns _KVM_FEATURES_FUNC_ID and _KVM_PTP_FUNC_ID. Change that
to return all the KVM/arm64-specific hypercalls exposed by
KVM/arm64 to guest operating systems.

Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
---
 arch/arm64/kvm/hypercalls.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)
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Patch

diff --git a/arch/arm64/kvm/hypercalls.c b/arch/arm64/kvm/hypercalls.c
index 27ce4cb44904..6132cb542200 100644
--- a/arch/arm64/kvm/hypercalls.c
+++ b/arch/arm64/kvm/hypercalls.c
@@ -359,7 +359,11 @@  int kvm_smccc_call_handler(struct kvm_vcpu *vcpu)
 		val[3] = ARM_SMCCC_VENDOR_HYP_UID_KVM_REG_3;
 		break;
 	case ARM_SMCCC_VENDOR_HYP_KVM_FEATURES_FUNC_ID:
-		val[0] = smccc_feat->vendor_hyp_bmap;
+		val[0] = GENMASK(ARM_SMCCC_KVM_FUNC_MMIO_GUARD,
+				 ARM_SMCCC_KVM_FUNC_FEATURES);
+		/* Function numbers 8-63 are reserved for pKVM for now */
+		val[2] = GENMASK((ARM_SMCCC_KVM_FUNC_DISCOVER_IMPL_CPUS - 64),
+				 (ARM_SMCCC_KVM_FUNC_DISCOVER_IMPL_VER - 64));
 		break;
 	case ARM_SMCCC_VENDOR_HYP_KVM_PTP_FUNC_ID:
 		kvm_ptp_get_time(vcpu, val);