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
next prev parent reply other threads:[~2021-07-17 9:56 UTC|newest]
Thread overview: 18+ 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 ` [PATCH 1/5] KVM: arm64: Walk userspace page tables to compute the THP mapping size Marc Zyngier
2021-07-19 6:31 ` Paolo Bonzini
2021-07-19 9:31 ` Marc Zyngier
2021-07-20 17:23 ` Alexandru Elisei
2021-07-20 20:33 ` Sean Christopherson
2021-07-21 14:58 ` Will Deacon
2021-07-21 15:56 ` Sean Christopherson
2021-07-21 16:37 ` Alexandru Elisei
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
2021-07-23 15:55 ` Alexandru Elisei
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
2021-07-19 6:31 ` Paolo Bonzini
2021-07-17 9:55 ` Marc Zyngier [this message]
2021-07-17 9:55 ` [PATCH 5/5] KVM: Get rid of kvm_get_pfn() Marc Zyngier
2021-07-19 6:31 ` Paolo Bonzini
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