From: Paul Durrant <pdurrant@xxxxxxxxxx> At the moment pages are marked dirty by open-coded calls to mark_page_dirty_in_slot(), directly deferefencing the gpa and memslot from the cache. After a subsequent patch these may not always be set so add a helper now so that caller will protected from the need to know about this detail. Signed-off-by: Paul Durrant <pdurrant@xxxxxxxxxx> Reviewed-by: David Woodhouse <dwmw@xxxxxxxxxxxx> --- Cc: David Woodhouse <dwmw2@xxxxxxxxxxxxx> Cc: Sean Christopherson <seanjc@xxxxxxxxxx> Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxxxxx> Cc: Borislav Petkov <bp@xxxxxxxxx> Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx> Cc: "H. Peter Anvin" <hpa@xxxxxxxxx> Cc: x86@xxxxxxxxxx v8: - Make the helper a static inline. --- arch/x86/kvm/x86.c | 2 +- arch/x86/kvm/xen.c | 6 +++--- include/linux/kvm_host.h | 11 +++++++++++ 3 files changed, 15 insertions(+), 4 deletions(-) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 27e23714e960..0a0ac91a494f 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -3156,7 +3156,7 @@ static void kvm_setup_guest_pvclock(struct kvm_vcpu *v, guest_hv_clock->version = ++vcpu->hv_clock.version; - mark_page_dirty_in_slot(v->kvm, gpc->memslot, gpc->gpa >> PAGE_SHIFT); + kvm_gpc_mark_dirty(gpc); read_unlock_irqrestore(&gpc->lock, flags); trace_kvm_pvclock_update(v->vcpu_id, &vcpu->hv_clock); diff --git a/arch/x86/kvm/xen.c b/arch/x86/kvm/xen.c index b63bf54bb376..34c48d0029c1 100644 --- a/arch/x86/kvm/xen.c +++ b/arch/x86/kvm/xen.c @@ -453,11 +453,11 @@ static void kvm_xen_update_runstate_guest(struct kvm_vcpu *v, bool atomic) } if (user_len2) { - mark_page_dirty_in_slot(v->kvm, gpc2->memslot, gpc2->gpa >> PAGE_SHIFT); + kvm_gpc_mark_dirty(gpc2); read_unlock(&gpc2->lock); } - mark_page_dirty_in_slot(v->kvm, gpc1->memslot, gpc1->gpa >> PAGE_SHIFT); + kvm_gpc_mark_dirty(gpc1); read_unlock_irqrestore(&gpc1->lock, flags); } @@ -565,7 +565,7 @@ void kvm_xen_inject_pending_events(struct kvm_vcpu *v) WRITE_ONCE(vi->evtchn_upcall_pending, 1); } - mark_page_dirty_in_slot(v->kvm, gpc->memslot, gpc->gpa >> PAGE_SHIFT); + kvm_gpc_mark_dirty(gpc); read_unlock_irqrestore(&gpc->lock, flags); /* For the per-vCPU lapic vector, deliver it as MSI. */ diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 7e7fd25b09b3..f3bb9e0a81fe 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -1399,6 +1399,17 @@ int kvm_gpc_refresh(struct gfn_to_pfn_cache *gpc, unsigned long len); */ void kvm_gpc_deactivate(struct gfn_to_pfn_cache *gpc); +/** + * kvm_gpc_mark_dirty - mark a cached page as dirty. + * + * @gpc: struct gfn_to_pfn_cache object. + */ +static inline void kvm_gpc_mark_dirty(struct gfn_to_pfn_cache *gpc) +{ + lockdep_assert_held(&gpc->lock); + mark_page_dirty_in_slot(gpc->kvm, gpc->memslot, gpc->gpa >> PAGE_SHIFT); +} + void kvm_sigset_activate(struct kvm_vcpu *vcpu); void kvm_sigset_deactivate(struct kvm_vcpu *vcpu); -- 2.39.2