diff options
| author | Joao Martins <joao.m.martins@oracle.com> | 2019-02-01 13:01:45 -0500 |
|---|---|---|
| committer | David Woodhouse <dwmw@amazon.co.uk> | 2021-02-04 14:19:39 +0000 |
| commit | aa096aa0a05ff7f1e7b8da95fae7aa71668212c7 (patch) | |
| tree | 9ac660afc423ced9ed81e4454dd1337e0f559a32 /arch/x86/kvm | |
| parent | 73e69a86347afe8156aa50c436fc192b280b0cd7 (diff) | |
| download | linux-aa096aa0a05ff7f1e7b8da95fae7aa71668212c7.tar.bz2 | |
KVM: x86/xen: setup pvclock updates
Parameterise kvm_setup_pvclock_page() a little bit so that it can be
invoked for different gfn_to_hva_cache structures, and with different
offsets. Then we can invoke it for the normal KVM pvclock and also for
the Xen one in the vcpu_info.
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Diffstat (limited to 'arch/x86/kvm')
| -rw-r--r-- | arch/x86/kvm/x86.c | 31 | ||||
| -rw-r--r-- | arch/x86/kvm/xen.c | 5 |
2 files changed, 21 insertions, 15 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 66cd574ee458..a295fb8a8978 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -2610,13 +2610,15 @@ u64 get_kvmclock_ns(struct kvm *kvm) return ret; } -static void kvm_setup_pvclock_page(struct kvm_vcpu *v) +static void kvm_setup_pvclock_page(struct kvm_vcpu *v, + struct gfn_to_hva_cache *cache, + unsigned int offset) { struct kvm_vcpu_arch *vcpu = &v->arch; struct pvclock_vcpu_time_info guest_hv_clock; - if (unlikely(kvm_read_guest_cached(v->kvm, &vcpu->pv_time, - &guest_hv_clock, sizeof(guest_hv_clock)))) + if (unlikely(kvm_read_guest_offset_cached(v->kvm, cache, + &guest_hv_clock, offset, sizeof(guest_hv_clock)))) return; /* This VCPU is paused, but it's legal for a guest to read another @@ -2639,9 +2641,9 @@ static void kvm_setup_pvclock_page(struct kvm_vcpu *v) ++guest_hv_clock.version; /* first time write, random junk */ vcpu->hv_clock.version = guest_hv_clock.version + 1; - kvm_write_guest_cached(v->kvm, &vcpu->pv_time, - &vcpu->hv_clock, - sizeof(vcpu->hv_clock.version)); + kvm_write_guest_offset_cached(v->kvm, cache, + &vcpu->hv_clock, offset, + sizeof(vcpu->hv_clock.version)); smp_wmb(); @@ -2655,16 +2657,16 @@ static void kvm_setup_pvclock_page(struct kvm_vcpu *v) trace_kvm_pvclock_update(v->vcpu_id, &vcpu->hv_clock); - kvm_write_guest_cached(v->kvm, &vcpu->pv_time, - &vcpu->hv_clock, - sizeof(vcpu->hv_clock)); + kvm_write_guest_offset_cached(v->kvm, cache, + &vcpu->hv_clock, offset, + sizeof(vcpu->hv_clock)); smp_wmb(); vcpu->hv_clock.version++; - kvm_write_guest_cached(v->kvm, &vcpu->pv_time, - &vcpu->hv_clock, - sizeof(vcpu->hv_clock.version)); + kvm_write_guest_offset_cached(v->kvm, cache, + &vcpu->hv_clock, offset, + sizeof(vcpu->hv_clock.version)); } static int kvm_guest_time_update(struct kvm_vcpu *v) @@ -2751,7 +2753,10 @@ static int kvm_guest_time_update(struct kvm_vcpu *v) vcpu->hv_clock.flags = pvclock_flags; if (vcpu->pv_time_enabled) - kvm_setup_pvclock_page(v); + kvm_setup_pvclock_page(v, &vcpu->pv_time, 0); + if (vcpu->xen.vcpu_info_set) + kvm_setup_pvclock_page(v, &vcpu->xen.vcpu_info_cache, + offsetof(struct compat_vcpu_info, time)); if (v == kvm_get_vcpu(v->kvm, 0)) kvm_hv_setup_tsc_page(v->kvm, &vcpu->hv_clock); return 0; diff --git a/arch/x86/kvm/xen.c b/arch/x86/kvm/xen.c index 2712f1aa9ac9..c307f8b7a8a3 100644 --- a/arch/x86/kvm/xen.c +++ b/arch/x86/kvm/xen.c @@ -135,11 +135,12 @@ int kvm_xen_vcpu_set_attr(struct kvm_vcpu *vcpu, struct kvm_xen_vcpu_attr *data) &vcpu->arch.xen.vcpu_info_cache, data->u.gpa, sizeof(struct vcpu_info)); - if (!r) + if (!r) { vcpu->arch.xen.vcpu_info_set = true; + kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); + } break; - default: break; } |