[PATCH 45/60] kvm: x86: Update state for all plane VCPUs after CPUID update
From: Jörg Rödel <joro@8bytes.org>
Date: 2026-06-08 14:43:25
Also in:
kvm, kvm-riscv, kvmarm, linux-mips, lkml, loongarch
Subsystem:
kernel virtual machine for x86 (kvm/x86), the rest, x86 architecture (32-bit and 64-bit) · Maintainers:
Sean Christopherson, Paolo Bonzini, Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen
From: Joerg Roedel <redacted> Make sure to update CPUID dependent state for all VCPUs of a given plane when CPUID state is updated. Signed-off-by: Joerg Roedel <redacted> --- arch/x86/kvm/cpuid.c | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-)
diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index 27e2f7e25038..fab075bb6fdc 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c@@ -513,6 +513,8 @@ static int kvm_set_cpuid(struct kvm_vcpu *vcpu, struct kvm_cpuid_entry2 *e2, { struct kvm_vcpu_common *common = vcpu->common; u32 vcpu_caps[NR_KVM_CPU_CAPS]; + struct kvm_vcpu *v; + unsigned i; int r; /*
@@ -562,9 +564,11 @@ static int kvm_set_cpuid(struct kvm_vcpu *vcpu, struct kvm_cpuid_entry2 *e2, #ifdef CONFIG_KVM_HYPERV if (kvm_cpuid_has_hyperv(vcpu)) { - r = kvm_hv_vcpu_init(vcpu); - if (r) - goto err; + vcpu_for_each_plane(common, i, v) { + r = kvm_hv_vcpu_init(vcpu); + if (r) + goto err; + } } #endif
@@ -572,10 +576,12 @@ static int kvm_set_cpuid(struct kvm_vcpu *vcpu, struct kvm_cpuid_entry2 *e2, if (r) goto err; + vcpu_for_each_plane(vcpu->common, i, v) { #ifdef CONFIG_KVM_XEN - vcpu->arch.xen.cpuid = kvm_get_hypervisor_cpuid(vcpu, XEN_SIGNATURE); + v->arch.xen.cpuid = kvm_get_hypervisor_cpuid(vcpu, XEN_SIGNATURE); #endif - kvm_vcpu_after_set_cpuid(vcpu); + kvm_vcpu_after_set_cpuid(v); + } success: kvfree(e2);
--
2.53.0