From: Michal Luczaj <mhal@xxxxxxx> Make kvm_gpc_check() use kvm instance cached in gfn_to_pfn_cache. Suggested-by: Sean Christopherson <seanjc@xxxxxxxxxx> Signed-off-by: Michal Luczaj <mhal@xxxxxxx> Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx> --- arch/x86/kvm/x86.c | 2 +- arch/x86/kvm/xen.c | 12 ++++++------ include/linux/kvm_host.h | 3 +-- virt/kvm/pfncache.c | 4 ++-- 4 files changed, 10 insertions(+), 11 deletions(-) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 0b4fa3455f3a..b357a84f8c49 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -3033,7 +3033,7 @@ static void kvm_setup_guest_pvclock(struct kvm_vcpu *v, WARN_ON_ONCE(gpc->len != offset + sizeof(*guest_hv_clock)); read_lock_irqsave(&gpc->lock, flags); - while (!kvm_gpc_check(v->kvm, gpc, gpc->gpa)) { + while (!kvm_gpc_check(gpc, gpc->gpa)) { read_unlock_irqrestore(&gpc->lock, flags); if (kvm_gpc_refresh(v->kvm, gpc, gpc->gpa)) diff --git a/arch/x86/kvm/xen.c b/arch/x86/kvm/xen.c index 6f5a5507392e..c7304f37c438 100644 --- a/arch/x86/kvm/xen.c +++ b/arch/x86/kvm/xen.c @@ -211,7 +211,7 @@ void kvm_xen_update_runstate_guest(struct kvm_vcpu *v, int state) return; read_lock_irqsave(&gpc->lock, flags); - while (!kvm_gpc_check(v->kvm, gpc, gpc->gpa)) { + while (!kvm_gpc_check(gpc, gpc->gpa)) { read_unlock_irqrestore(&gpc->lock, flags); /* When invoked from kvm_sched_out() we cannot sleep */ @@ -344,7 +344,7 @@ void kvm_xen_inject_pending_events(struct kvm_vcpu *v) * little more honest about it. */ read_lock_irqsave(&gpc->lock, flags); - while (!kvm_gpc_check(v->kvm, gpc, gpc->gpa)) { + while (!kvm_gpc_check(gpc, gpc->gpa)) { read_unlock_irqrestore(&gpc->lock, flags); if (kvm_gpc_refresh(v->kvm, gpc, gpc->gpa)) @@ -407,7 +407,7 @@ int __kvm_xen_has_interrupt(struct kvm_vcpu *v) sizeof_field(struct compat_vcpu_info, evtchn_upcall_pending)); read_lock_irqsave(&gpc->lock, flags); - while (!kvm_gpc_check(v->kvm, gpc, gpc->gpa)) { + while (!kvm_gpc_check(gpc, gpc->gpa)) { read_unlock_irqrestore(&gpc->lock, flags); /* @@ -947,7 +947,7 @@ static bool wait_pending_event(struct kvm_vcpu *vcpu, int nr_ports, read_lock_irqsave(&gpc->lock, flags); idx = srcu_read_lock(&kvm->srcu); - if (!kvm_gpc_check(kvm, gpc, gpc->gpa)) + if (!kvm_gpc_check(gpc, gpc->gpa)) goto out_rcu; ret = false; @@ -1338,7 +1338,7 @@ int kvm_xen_set_evtchn_fast(struct kvm_xen_evtchn *xe, struct kvm *kvm) idx = srcu_read_lock(&kvm->srcu); read_lock_irqsave(&gpc->lock, flags); - if (!kvm_gpc_check(kvm, gpc, gpc->gpa)) + if (!kvm_gpc_check(gpc, gpc->gpa)) goto out_rcu; if (IS_ENABLED(CONFIG_64BIT) && kvm->arch.xen.long_mode) { @@ -1372,7 +1372,7 @@ int kvm_xen_set_evtchn_fast(struct kvm_xen_evtchn *xe, struct kvm *kvm) gpc = &vcpu->arch.xen.vcpu_info_cache; read_lock_irqsave(&gpc->lock, flags); - if (!kvm_gpc_check(kvm, gpc, gpc->gpa)) { + if (!kvm_gpc_check(gpc, gpc->gpa)) { /* * Could not access the vcpu_info. Set the bit in-kernel * and prod the vCPU to deliver it for itself. diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index c79f2e122ac8..ad8ef7f2d705 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -1282,7 +1282,6 @@ int kvm_gpc_activate(struct gfn_to_pfn_cache *gpc, gpa_t gpa); /** * kvm_gpc_check - check validity of a gfn_to_pfn_cache. * - * @kvm: pointer to kvm instance. * @gpc: struct gfn_to_pfn_cache object. * @gpa: current guest physical address to map. * @@ -1296,7 +1295,7 @@ int kvm_gpc_activate(struct gfn_to_pfn_cache *gpc, gpa_t gpa); * Callers in IN_GUEST_MODE may do so without locking, although they should * still hold a read lock on kvm->scru for the memslot checks. */ -bool kvm_gpc_check(struct kvm *kvm, struct gfn_to_pfn_cache *gpc, gpa_t gpa); +bool kvm_gpc_check(struct gfn_to_pfn_cache *gpc, gpa_t gpa); /** * kvm_gpc_refresh - update a previously initialized cache. diff --git a/virt/kvm/pfncache.c b/virt/kvm/pfncache.c index 34883ad12536..6fe76fb4d228 100644 --- a/virt/kvm/pfncache.c +++ b/virt/kvm/pfncache.c @@ -76,9 +76,9 @@ void gfn_to_pfn_cache_invalidate_start(struct kvm *kvm, unsigned long start, } } -bool kvm_gpc_check(struct kvm *kvm, struct gfn_to_pfn_cache *gpc, gpa_t gpa) +bool kvm_gpc_check(struct gfn_to_pfn_cache *gpc, gpa_t gpa) { - struct kvm_memslots *slots = kvm_memslots(kvm); + struct kvm_memslots *slots = kvm_memslots(gpc->kvm); if (!gpc->active) return false; -- 2.38.0.413.g74048e4d9e-goog