[PATCH 4/5] KVM: arm64: Use get_page() instead of kvm_get_pfn()

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From: Marc Zyngier <maz@kernel.org>
To: linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org,
	kvmarm@lists.cs.columbia.edu, linux-mm@kvack.org
Cc: Sean Christopherson <seanjc@google.com>,
	Matthew Wilcox <willy@infradead.org>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Will Deacon <will@kernel.org>,
	Quentin Perret <qperret@google.com>,
	James Morse <james.morse@arm.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Alexandru Elisei <alexandru.elisei@arm.com>,
	kernel-team@android.com
Subject: [PATCH 4/5] KVM: arm64: Use get_page() instead of kvm_get_pfn()
Date: Sat, 17 Jul 2021 10:55:40 +0100	[thread overview]
Message-ID: <20210717095541.1486210-5-maz@kernel.org> (raw)
In-Reply-To: <20210717095541.1486210-1-maz@kernel.org>

When mapping a THP, we are guaranteed that the page isn't reserved,
and we can safely avoid the kvm_is_reserved_pfn() call.

Replace kvm_get_pfn() with get_page(pfn_to_page()).

Signed-off-by: Marc Zyngier <maz@kernel.org>
---
 arch/arm64/kvm/mmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c
index c036a480ca27..0e8dab124cbd 100644
--- a/arch/arm64/kvm/mmu.c
+++ b/arch/arm64/kvm/mmu.c
@@ -852,7 +852,7 @@ transparent_hugepage_adjust(struct kvm *kvm, struct kvm_memory_slot *memslot,
 		*ipap &= PMD_MASK;
 		kvm_release_pfn_clean(pfn);
 		pfn &= ~(PTRS_PER_PMD - 1);
-		kvm_get_pfn(pfn);
+		get_page(pfn_to_page(pfn));
 		*pfnp = pfn;
 
 		return PMD_SIZE;
-- 
2.30.2

WARNING: multiple messages have this Message-ID (diff)

From: Marc Zyngier <maz@kernel.org>
To: linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org,
	kvmarm@lists.cs.columbia.edu, linux-mm@kvack.org
Cc: kernel-team@android.com, Sean Christopherson <seanjc@google.com>,
	Matthew Wilcox <willy@infradead.org>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Will Deacon <will@kernel.org>
Subject: [PATCH 4/5] KVM: arm64: Use get_page() instead of kvm_get_pfn()
Date: Sat, 17 Jul 2021 10:55:40 +0100	[thread overview]
Message-ID: <20210717095541.1486210-5-maz@kernel.org> (raw)
In-Reply-To: <20210717095541.1486210-1-maz@kernel.org>

When mapping a THP, we are guaranteed that the page isn't reserved,
and we can safely avoid the kvm_is_reserved_pfn() call.

Replace kvm_get_pfn() with get_page(pfn_to_page()).

Signed-off-by: Marc Zyngier <maz@kernel.org>
---
 arch/arm64/kvm/mmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c
index c036a480ca27..0e8dab124cbd 100644
--- a/arch/arm64/kvm/mmu.c
+++ b/arch/arm64/kvm/mmu.c
@@ -852,7 +852,7 @@ transparent_hugepage_adjust(struct kvm *kvm, struct kvm_memory_slot *memslot,
 		*ipap &= PMD_MASK;
 		kvm_release_pfn_clean(pfn);
 		pfn &= ~(PTRS_PER_PMD - 1);
-		kvm_get_pfn(pfn);
+		get_page(pfn_to_page(pfn));
 		*pfnp = pfn;
 
 		return PMD_SIZE;
-- 
2.30.2

_______________________________________________
kvmarm mailing list
kvmarm@lists.cs.columbia.edu
https://lists.cs.columbia.edu/mailman/listinfo/kvmarm

WARNING: multiple messages have this Message-ID (diff)

From: Marc Zyngier <maz@kernel.org>
To: linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org,
	kvmarm@lists.cs.columbia.edu, linux-mm@kvack.org
Cc: Sean Christopherson <seanjc@google.com>,
	Matthew Wilcox <willy@infradead.org>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Will Deacon <will@kernel.org>,
	Quentin Perret <qperret@google.com>,
	James Morse <james.morse@arm.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Alexandru Elisei <alexandru.elisei@arm.com>,
	kernel-team@android.com
Subject: [PATCH 4/5] KVM: arm64: Use get_page() instead of kvm_get_pfn()
Date: Sat, 17 Jul 2021 10:55:40 +0100	[thread overview]
Message-ID: <20210717095541.1486210-5-maz@kernel.org> (raw)
In-Reply-To: <20210717095541.1486210-1-maz@kernel.org>

When mapping a THP, we are guaranteed that the page isn't reserved,
and we can safely avoid the kvm_is_reserved_pfn() call.

Replace kvm_get_pfn() with get_page(pfn_to_page()).

Signed-off-by: Marc Zyngier <maz@kernel.org>
---
 arch/arm64/kvm/mmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c
index c036a480ca27..0e8dab124cbd 100644
--- a/arch/arm64/kvm/mmu.c
+++ b/arch/arm64/kvm/mmu.c
@@ -852,7 +852,7 @@ transparent_hugepage_adjust(struct kvm *kvm, struct kvm_memory_slot *memslot,
 		*ipap &= PMD_MASK;
 		kvm_release_pfn_clean(pfn);
 		pfn &= ~(PTRS_PER_PMD - 1);
-		kvm_get_pfn(pfn);
+		get_page(pfn_to_page(pfn));
 		*pfnp = pfn;
 
 		return PMD_SIZE;
-- 
2.30.2


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

next prev parent reply	other threads:[~2021-07-17  9:56 UTC|newest]

Thread overview: 54+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-17  9:55 [PATCH 0/5] KVM: Remove kvm_is_transparent_hugepage() and friends Marc Zyngier
2021-07-17  9:55 ` Marc Zyngier
2021-07-17  9:55 ` Marc Zyngier
2021-07-17  9:55 ` [PATCH 1/5] KVM: arm64: Walk userspace page tables to compute the THP mapping size Marc Zyngier
2021-07-17  9:55   ` Marc Zyngier
2021-07-17  9:55   ` Marc Zyngier
2021-07-19  6:31   ` Paolo Bonzini
2021-07-19  6:31     ` Paolo Bonzini
2021-07-19  6:31     ` Paolo Bonzini
2021-07-19  9:31     ` Marc Zyngier
2021-07-19  9:31       ` Marc Zyngier
2021-07-19  9:31       ` Marc Zyngier
2021-07-20 17:23   ` Alexandru Elisei
2021-07-20 17:23     ` Alexandru Elisei
2021-07-20 17:23     ` Alexandru Elisei
2021-07-20 20:33     ` Sean Christopherson
2021-07-20 20:33       ` Sean Christopherson
2021-07-20 20:33       ` Sean Christopherson
2021-07-21 14:58       ` Will Deacon
2021-07-21 14:58         ` Will Deacon
2021-07-21 14:58         ` Will Deacon
2021-07-21 15:56         ` Sean Christopherson
2021-07-21 15:56           ` Sean Christopherson
2021-07-21 15:56           ` Sean Christopherson
2021-07-21 16:37       ` Alexandru Elisei
2021-07-21 16:37         ` Alexandru Elisei
2021-07-21 16:37         ` Alexandru Elisei
2021-07-23  8:48     ` Marc Zyngier
2021-07-23  8:48       ` Marc Zyngier
2021-07-23  8:48       ` Marc Zyngier
2021-07-17  9:55 ` [PATCH 2/5] KVM: arm64: Avoid mapping size adjustment on permission fault Marc Zyngier
2021-07-17  9:55   ` Marc Zyngier
2021-07-17  9:55   ` Marc Zyngier
2021-07-23 15:55   ` Alexandru Elisei
2021-07-23 15:55     ` Alexandru Elisei
2021-07-23 15:55     ` Alexandru Elisei
2021-07-23 16:18     ` Marc Zyngier
2021-07-23 16:18       ` Marc Zyngier
2021-07-23 16:18       ` Marc Zyngier
2021-07-17  9:55 ` [PATCH 3/5] KVM: Remove kvm_is_transparent_hugepage() and PageTransCompoundMap() Marc Zyngier
2021-07-17  9:55   ` Marc Zyngier
2021-07-17  9:55   ` Marc Zyngier
2021-07-19  6:31   ` Paolo Bonzini
2021-07-19  6:31     ` Paolo Bonzini
2021-07-19  6:31     ` Paolo Bonzini
2021-07-17  9:55 ` Marc Zyngier [this message]
2021-07-17  9:55   ` [PATCH 4/5] KVM: arm64: Use get_page() instead of kvm_get_pfn() Marc Zyngier
2021-07-17  9:55   ` Marc Zyngier
2021-07-17  9:55 ` [PATCH 5/5] KVM: Get rid " Marc Zyngier
2021-07-17  9:55   ` Marc Zyngier
2021-07-17  9:55   ` Marc Zyngier
2021-07-19  6:31   ` Paolo Bonzini
2021-07-19  6:31     ` Paolo Bonzini
2021-07-19  6:31     ` Paolo Bonzini

find likely ancestor, descendant, or conflicting patches for this message:
dfblob:c036a480ca2 dfblob:c036a480ca2 dfblob:c036a480ca2
dfblob:0e8dab124cb dfblob:0e8dab124cb dfblob:0e8dab124cb
	(help)

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