linux-kernel - [PATCH v2 09/16] KVM: Clean up hva_to_pfn

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Date:   Thu, 13 Oct 2022 21:12:27 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Sean Christopherson <seanjc@...gle.com>,
        Paolo Bonzini <pbonzini@...hat.com>
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Michal Luczaj <mhal@...x.co>,
        David Woodhouse <dwmw2@...radead.org>
Subject: [PATCH v2 09/16] KVM: Clean up hva_to_pfn_retry()

From: Michal Luczaj <mhal@...x.co>

Make hva_to_pfn_retry() use kvm instance cached in gfn_to_pfn_cache.

Suggested-by: Sean Christopherson <seanjc@...gle.com>
Signed-off-by: Michal Luczaj <mhal@...x.co>
Signed-off-by: Sean Christopherson <seanjc@...gle.com>
---
 virt/kvm/pfncache.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/virt/kvm/pfncache.c b/virt/kvm/pfncache.c
index 6fe76fb4d228..ef7ac1666847 100644
--- a/virt/kvm/pfncache.c
+++ b/virt/kvm/pfncache.c
@@ -138,7 +138,7 @@ static inline bool mmu_notifier_retry_cache(struct kvm *kvm, unsigned long mmu_s
 	return kvm->mmu_invalidate_seq != mmu_seq;
 }
 
-static kvm_pfn_t hva_to_pfn_retry(struct kvm *kvm, struct gfn_to_pfn_cache *gpc)
+static kvm_pfn_t hva_to_pfn_retry(struct gfn_to_pfn_cache *gpc)
 {
 	/* Note, the new page offset may be different than the old! */
 	void *old_khva = gpc->khva - offset_in_page(gpc->khva);
@@ -158,7 +158,7 @@ static kvm_pfn_t hva_to_pfn_retry(struct kvm *kvm, struct gfn_to_pfn_cache *gpc)
 	gpc->valid = false;
 
 	do {
-		mmu_seq = kvm->mmu_invalidate_seq;
+		mmu_seq = gpc->kvm->mmu_invalidate_seq;
 		smp_rmb();
 
 		write_unlock_irq(&gpc->lock);
@@ -216,7 +216,7 @@ static kvm_pfn_t hva_to_pfn_retry(struct kvm *kvm, struct gfn_to_pfn_cache *gpc)
 		 * attempting to refresh.
 		 */
 		WARN_ON_ONCE(gpc->valid);
-	} while (mmu_notifier_retry_cache(kvm, mmu_seq));
+	} while (mmu_notifier_retry_cache(gpc->kvm, mmu_seq));
 
 	gpc->valid = true;
 	gpc->pfn = new_pfn;
@@ -293,7 +293,7 @@ int kvm_gpc_refresh(struct kvm *kvm, struct gfn_to_pfn_cache *gpc, gpa_t gpa)
 	 * drop the lock and do the HVA to PFN lookup again.
 	 */
 	if (!gpc->valid || old_uhva != gpc->uhva) {
-		ret = hva_to_pfn_retry(kvm, gpc);
+		ret = hva_to_pfn_retry(gpc);
 	} else {
 		/* If the HVA→PFN mapping was already valid, don't unmap it. */
 		old_pfn = KVM_PFN_ERR_FAULT;
-- 
2.38.0.413.g74048e4d9e-goog