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| author | Paul Durrant <pdurrant@amazon.com> | 2023-01-06 13:36:00 +0300 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2023-01-24 21:05:20 +0300 |
| commit | f422f853af0369be27d2a9f1b20079f2bc3d1ca2 (patch) | |
| tree | 2e4b182f4c52c9dd41ae7836d9680b27cdfff6a1 /arch/x86/kvm/xen.h | |
| parent | 48639df8a9e3a1dfcb5880f77556681bd1e53657 (diff) | |
| download | linux-f422f853af0369be27d2a9f1b20079f2bc3d1ca2.tar.xz | |
KVM: x86/xen: update Xen CPUID Leaf 4 (tsc info) sub-leaves, if present
The scaling information in subleaf 1 should match the values set by KVM in
the 'vcpu_info' sub-structure 'time_info' (a.k.a. pvclock_vcpu_time_info)
which is shared with the guest, but is not directly available to the VMM.
The offset values are not set since a TSC offset is already applied.
The TSC frequency should also be set in sub-leaf 2.
Signed-off-by: Paul Durrant <pdurrant@amazon.com>
Reviewed-by: David Woodhouse <dwmw@amazon.co.uk>
Link: https://lore.kernel.org/r/20230106103600.528-3-pdurrant@amazon.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'arch/x86/kvm/xen.h')
| -rw-r--r-- | arch/x86/kvm/xen.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/kvm/xen.h b/arch/x86/kvm/xen.h index ea33d80a0c51..f8f1fe22d090 100644 --- a/arch/x86/kvm/xen.h +++ b/arch/x86/kvm/xen.h @@ -9,6 +9,8 @@ #ifndef __ARCH_X86_KVM_XEN_H__ #define __ARCH_X86_KVM_XEN_H__ +#include <asm/xen/hypervisor.h> + #ifdef CONFIG_KVM_XEN #include <linux/jump_label_ratelimit.h> @@ -32,6 +34,7 @@ int kvm_xen_set_evtchn_fast(struct kvm_xen_evtchn *xe, int kvm_xen_setup_evtchn(struct kvm *kvm, struct kvm_kernel_irq_routing_entry *e, const struct kvm_irq_routing_entry *ue); +void kvm_xen_update_tsc_info(struct kvm_vcpu *vcpu); static inline bool kvm_xen_msr_enabled(struct kvm *kvm) { @@ -135,6 +138,10 @@ static inline bool kvm_xen_timer_enabled(struct kvm_vcpu *vcpu) { return false; } + +static inline void kvm_xen_update_tsc_info(struct kvm_vcpu *vcpu) +{ +} #endif int kvm_xen_hypercall(struct kvm_vcpu *vcpu); |