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From: Will Deacon <will@kernel.org>
To: kvmarm@lists.cs.columbia.edu
Cc: kernel-team@android.com, Marc Zyngier <maz@kernel.org>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH v4 08/21] KVM: arm64: Convert kvm_set_spte_hva() to generic page-table API
Date: Mon,  7 Sep 2020 16:23:31 +0100	[thread overview]
Message-ID: <20200907152344.12978-9-will@kernel.org> (raw)
In-Reply-To: <20200907152344.12978-1-will@kernel.org>

Convert kvm_set_spte_hva() to use kvm_pgtable_stage2_map() instead
of stage2_set_pte().

Cc: Marc Zyngier <maz@kernel.org>
Cc: Quentin Perret <qperret@google.com>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Signed-off-by: Will Deacon <will@kernel.org>
---
 arch/arm64/kvm/mmu.c | 23 ++++++++++-------------
 1 file changed, 10 insertions(+), 13 deletions(-)

diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c
index 33146d3dc93a..704b471a48ce 100644
--- a/arch/arm64/kvm/mmu.c
+++ b/arch/arm64/kvm/mmu.c
@@ -1911,28 +1911,27 @@ int kvm_unmap_hva_range(struct kvm *kvm,
 
 static int kvm_set_spte_handler(struct kvm *kvm, gpa_t gpa, u64 size, void *data)
 {
-	pte_t *pte = (pte_t *)data;
+	kvm_pfn_t *pfn = (kvm_pfn_t *)data;
 
 	WARN_ON(size != PAGE_SIZE);
+
 	/*
-	 * We can always call stage2_set_pte with KVM_S2PTE_FLAG_LOGGING_ACTIVE
-	 * flag clear because MMU notifiers will have unmapped a huge PMD before
-	 * calling ->change_pte() (which in turn calls kvm_set_spte_hva()) and
-	 * therefore stage2_set_pte() never needs to clear out a huge PMD
-	 * through this calling path.
+	 * The MMU notifiers will have unmapped a huge PMD before calling
+	 * ->change_pte() (which in turn calls kvm_set_spte_hva()) and
+	 * therefore we never need to clear out a huge PMD through this
+	 * calling path and a memcache is not required.
 	 */
-	stage2_set_pte(&kvm->arch.mmu, NULL, gpa, pte, 0);
+	kvm_pgtable_stage2_map(kvm->arch.mmu.pgt, gpa, PAGE_SIZE,
+			       __pfn_to_phys(*pfn), KVM_PGTABLE_PROT_R, NULL);
 	return 0;
 }
 
-
 int kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte)
 {
 	unsigned long end = hva + PAGE_SIZE;
 	kvm_pfn_t pfn = pte_pfn(pte);
-	pte_t stage2_pte;
 
-	if (!kvm->arch.mmu.pgd)
+	if (!kvm->arch.mmu.pgt)
 		return 0;
 
 	trace_kvm_set_spte_hva(hva);
@@ -1942,9 +1941,7 @@ int kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte)
 	 * just like a translation fault and clean the cache to the PoC.
 	 */
 	clean_dcache_guest_page(pfn, PAGE_SIZE);
-	stage2_pte = kvm_pfn_pte(pfn, PAGE_S2);
-	handle_hva_to_gpa(kvm, hva, end, &kvm_set_spte_handler, &stage2_pte);
-
+	handle_hva_to_gpa(kvm, hva, end, &kvm_set_spte_handler, &pfn);
 	return 0;
 }
 
-- 
2.28.0.526.ge36021eeef-goog

_______________________________________________
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: Will Deacon <will@kernel.org>
To: kvmarm@lists.cs.columbia.edu
Cc: kernel-team@android.com, Gavin Shan <gshan@redhat.com>,
	Suzuki Poulose <suzuki.poulose@arm.com>,
	Marc Zyngier <maz@kernel.org>,
	Quentin Perret <qperret@google.com>,
	Alexandru Elisei <alexandru.elisei@arm.com>,
	James Morse <james.morse@arm.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH v4 08/21] KVM: arm64: Convert kvm_set_spte_hva() to generic page-table API
Date: Mon,  7 Sep 2020 16:23:31 +0100	[thread overview]
Message-ID: <20200907152344.12978-9-will@kernel.org> (raw)
In-Reply-To: <20200907152344.12978-1-will@kernel.org>

Convert kvm_set_spte_hva() to use kvm_pgtable_stage2_map() instead
of stage2_set_pte().

Cc: Marc Zyngier <maz@kernel.org>
Cc: Quentin Perret <qperret@google.com>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Signed-off-by: Will Deacon <will@kernel.org>
---
 arch/arm64/kvm/mmu.c | 23 ++++++++++-------------
 1 file changed, 10 insertions(+), 13 deletions(-)

diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c
index 33146d3dc93a..704b471a48ce 100644
--- a/arch/arm64/kvm/mmu.c
+++ b/arch/arm64/kvm/mmu.c
@@ -1911,28 +1911,27 @@ int kvm_unmap_hva_range(struct kvm *kvm,
 
 static int kvm_set_spte_handler(struct kvm *kvm, gpa_t gpa, u64 size, void *data)
 {
-	pte_t *pte = (pte_t *)data;
+	kvm_pfn_t *pfn = (kvm_pfn_t *)data;
 
 	WARN_ON(size != PAGE_SIZE);
+
 	/*
-	 * We can always call stage2_set_pte with KVM_S2PTE_FLAG_LOGGING_ACTIVE
-	 * flag clear because MMU notifiers will have unmapped a huge PMD before
-	 * calling ->change_pte() (which in turn calls kvm_set_spte_hva()) and
-	 * therefore stage2_set_pte() never needs to clear out a huge PMD
-	 * through this calling path.
+	 * The MMU notifiers will have unmapped a huge PMD before calling
+	 * ->change_pte() (which in turn calls kvm_set_spte_hva()) and
+	 * therefore we never need to clear out a huge PMD through this
+	 * calling path and a memcache is not required.
 	 */
-	stage2_set_pte(&kvm->arch.mmu, NULL, gpa, pte, 0);
+	kvm_pgtable_stage2_map(kvm->arch.mmu.pgt, gpa, PAGE_SIZE,
+			       __pfn_to_phys(*pfn), KVM_PGTABLE_PROT_R, NULL);
 	return 0;
 }
 
-
 int kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte)
 {
 	unsigned long end = hva + PAGE_SIZE;
 	kvm_pfn_t pfn = pte_pfn(pte);
-	pte_t stage2_pte;
 
-	if (!kvm->arch.mmu.pgd)
+	if (!kvm->arch.mmu.pgt)
 		return 0;
 
 	trace_kvm_set_spte_hva(hva);
@@ -1942,9 +1941,7 @@ int kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte)
 	 * just like a translation fault and clean the cache to the PoC.
 	 */
 	clean_dcache_guest_page(pfn, PAGE_SIZE);
-	stage2_pte = kvm_pfn_pte(pfn, PAGE_S2);
-	handle_hva_to_gpa(kvm, hva, end, &kvm_set_spte_handler, &stage2_pte);
-
+	handle_hva_to_gpa(kvm, hva, end, &kvm_set_spte_handler, &pfn);
 	return 0;
 }
 
-- 
2.28.0.526.ge36021eeef-goog


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

  parent reply	other threads:[~2020-09-07 15:24 UTC|newest]

Thread overview: 104+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-07 15:23 [PATCH v4 00/21] KVM: arm64: Rewrite page-table code and fault handling Will Deacon
2020-09-07 15:23 ` Will Deacon
2020-09-07 15:23 ` [PATCH v4 01/21] KVM: arm64: Remove kvm_mmu_free_memory_caches() Will Deacon
2020-09-07 15:23   ` Will Deacon
2020-09-07 15:23 ` [PATCH v4 02/21] KVM: arm64: Add stand-alone page-table walker infrastructure Will Deacon
2020-09-07 15:23   ` Will Deacon
2020-09-08  0:03   ` Gavin Shan
2020-09-08  0:03     ` Gavin Shan
2020-09-10 10:57     ` Will Deacon
2020-09-10 10:57       ` Will Deacon
2020-09-09 15:29   ` Alexandru Elisei
2020-09-09 15:29     ` Alexandru Elisei
2020-09-10 12:37     ` Will Deacon
2020-09-10 12:37       ` Will Deacon
2020-09-10 14:21       ` Andrew Scull
2020-09-10 14:21         ` Andrew Scull
2020-09-11 10:15         ` Will Deacon
2020-09-11 10:15           ` Will Deacon
2020-09-11 11:22           ` Andrew Scull
2020-09-11 11:22             ` Andrew Scull
2020-09-07 15:23 ` [PATCH v4 03/21] KVM: arm64: Add support for creating kernel-agnostic stage-1 page tables Will Deacon
2020-09-07 15:23   ` Will Deacon
2020-09-08  1:09   ` Gavin Shan
2020-09-08  1:09     ` Gavin Shan
2020-09-07 15:23 ` [PATCH v4 04/21] KVM: arm64: Use generic allocator for hyp stage-1 page-tables Will Deacon
2020-09-07 15:23   ` Will Deacon
2020-09-08  1:03   ` Gavin Shan
2020-09-08  1:03     ` Gavin Shan
2020-09-07 15:23 ` [PATCH v4 05/21] KVM: arm64: Add support for creating kernel-agnostic stage-2 page tables Will Deacon
2020-09-07 15:23   ` Will Deacon
2020-09-07 15:23 ` [PATCH v4 06/21] KVM: arm64: Add support for stage-2 map()/unmap() in generic page-table Will Deacon
2020-09-07 15:23   ` Will Deacon
2020-09-10 11:20   ` Alexandru Elisei
2020-09-10 11:20     ` Alexandru Elisei
2020-09-10 12:34     ` Will Deacon
2020-09-10 12:34       ` Will Deacon
2020-09-10 13:55       ` Alexandru Elisei
2020-09-10 13:55         ` Alexandru Elisei
2020-09-07 15:23 ` [PATCH v4 07/21] KVM: arm64: Convert kvm_phys_addr_ioremap() to generic page-table API Will Deacon
2020-09-07 15:23   ` Will Deacon
2020-09-07 15:23 ` Will Deacon [this message]
2020-09-07 15:23   ` [PATCH v4 08/21] KVM: arm64: Convert kvm_set_spte_hva() " Will Deacon
2020-09-07 15:23 ` [PATCH v4 09/21] KVM: arm64: Convert unmap_stage2_range() " Will Deacon
2020-09-07 15:23   ` Will Deacon
2020-09-07 15:23 ` [PATCH v4 10/21] KVM: arm64: Add support for stage-2 page-aging in generic page-table Will Deacon
2020-09-07 15:23   ` Will Deacon
2020-09-08 15:30   ` Alexandru Elisei
2020-09-08 15:30     ` Alexandru Elisei
2020-09-10 12:42     ` Will Deacon
2020-09-10 12:42       ` Will Deacon
2020-09-07 15:23 ` [PATCH v4 11/21] KVM: arm64: Convert page-aging and access faults to generic page-table API Will Deacon
2020-09-07 15:23   ` Will Deacon
2020-09-08 15:39   ` Alexandru Elisei
2020-09-08 15:39     ` Alexandru Elisei
2020-09-07 15:23 ` [PATCH v4 12/21] KVM: arm64: Add support for stage-2 write-protect in generic page-table Will Deacon
2020-09-07 15:23   ` Will Deacon
2020-09-07 15:23 ` [PATCH v4 13/21] KVM: arm64: Convert write-protect operation to generic page-table API Will Deacon
2020-09-07 15:23   ` Will Deacon
2020-09-07 15:23 ` [PATCH v4 14/21] KVM: arm64: Add support for stage-2 cache flushing in generic page-table Will Deacon
2020-09-07 15:23   ` Will Deacon
2020-09-07 15:23 ` [PATCH v4 15/21] KVM: arm64: Convert memslot cache-flushing code to generic page-table API Will Deacon
2020-09-07 15:23   ` Will Deacon
2020-09-07 15:23 ` [PATCH v4 16/21] KVM: arm64: Add support for relaxing stage-2 perms in generic page-table code Will Deacon
2020-09-07 15:23   ` Will Deacon
2020-09-08 16:37   ` Alexandru Elisei
2020-09-08 16:37     ` Alexandru Elisei
2020-09-07 15:23 ` [PATCH v4 17/21] KVM: arm64: Convert user_mem_abort() to generic page-table API Will Deacon
2020-09-07 15:23   ` Will Deacon
2020-09-09 14:20   ` Alexandru Elisei
2020-09-09 14:20     ` Alexandru Elisei
2020-09-09 17:12     ` Marc Zyngier
2020-09-09 17:12       ` Marc Zyngier
2020-09-10 10:51       ` Will Deacon
2020-09-10 10:51         ` Will Deacon
2020-09-10 10:58         ` Marc Zyngier
2020-09-10 10:58           ` Marc Zyngier
2020-09-10 13:10         ` Alexandru Elisei
2020-09-10 13:10           ` Alexandru Elisei
2020-09-10 13:20       ` Alexandru Elisei
2020-09-10 13:20         ` Alexandru Elisei
2020-09-07 15:23 ` [PATCH v4 18/21] KVM: arm64: Check the pgt instead of the pgd when modifying page-table Will Deacon
2020-09-07 15:23   ` Will Deacon
2020-09-07 15:23 ` [PATCH v4 19/21] KVM: arm64: Remove unused page-table code Will Deacon
2020-09-07 15:23   ` Will Deacon
2020-09-08 10:33   ` Marc Zyngier
2020-09-08 10:33     ` Marc Zyngier
2020-09-10 10:54     ` Will Deacon
2020-09-10 10:54       ` Will Deacon
2020-09-07 15:23 ` [PATCH v4 20/21] KVM: arm64: Remove unused 'pgd' field from 'struct kvm_s2_mmu' Will Deacon
2020-09-07 15:23   ` Will Deacon
2020-09-07 15:23 ` [PATCH v4 21/21] KVM: arm64: Don't constrain maximum IPA size based on host configuration Will Deacon
2020-09-07 15:23   ` Will Deacon
2020-09-09 14:53   ` Alexandru Elisei
2020-09-09 14:53     ` Alexandru Elisei
2020-09-07 17:16 ` [PATCH v4 00/21] KVM: arm64: Rewrite page-table code and fault handling Marc Zyngier
2020-09-07 17:16   ` Marc Zyngier
2020-09-07 17:31   ` Will Deacon
2020-09-07 17:31     ` Will Deacon
2020-09-10  4:06 ` Gavin Shan
2020-09-10  4:06   ` Gavin Shan
2020-09-10  4:11   ` Gavin Shan
2020-09-10  4:11     ` Gavin Shan
2020-09-10 10:58   ` Will Deacon
2020-09-10 10:58     ` Will Deacon

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