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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 14/21] KVM: arm64: Add support for stage-2 cache flushing in generic page-table
Date: Mon,  7 Sep 2020 16:23:37 +0100	[thread overview]
Message-ID: <20200907152344.12978-15-will@kernel.org> (raw)
In-Reply-To: <20200907152344.12978-1-will@kernel.org>

From: Quentin Perret <qperret@google.com>

Add support for cache flushing a range of the stage-2 address space to
the generic page-table code.

Cc: Marc Zyngier <maz@kernel.org>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Signed-off-by: Quentin Perret <qperret@google.com>
Signed-off-by: Will Deacon <will@kernel.org>
---
 arch/arm64/include/asm/kvm_pgtable.h | 12 ++++++++++++
 arch/arm64/kvm/hyp/pgtable.c         | 26 ++++++++++++++++++++++++++
 2 files changed, 38 insertions(+)

diff --git a/arch/arm64/include/asm/kvm_pgtable.h b/arch/arm64/include/asm/kvm_pgtable.h
index e9491c91bd06..a776bcf74316 100644
--- a/arch/arm64/include/asm/kvm_pgtable.h
+++ b/arch/arm64/include/asm/kvm_pgtable.h
@@ -228,6 +228,18 @@ kvm_pte_t kvm_pgtable_stage2_mkold(struct kvm_pgtable *pgt, u64 addr);
  */
 bool kvm_pgtable_stage2_is_young(struct kvm_pgtable *pgt, u64 addr);
 
+/**
+ * kvm_pgtable_stage2_flush_range() - Clean and invalidate data cache to Point
+ * 				      of Coherency for guest stage-2 address
+ *				      range.
+ * @pgt:	Page-table structure initialised by kvm_pgtable_stage2_init().
+ * @addr:	Intermediate physical address from which to flush.
+ * @size:	Size of the range.
+ *
+ * Return: 0 on success, negative error code on failure.
+ */
+int kvm_pgtable_stage2_flush(struct kvm_pgtable *pgt, u64 addr, u64 size);
+
 /**
  * kvm_pgtable_walk() - Walk a page-table.
  * @pgt:	Page-table structure initialised by kvm_pgtable_*_init().
diff --git a/arch/arm64/kvm/hyp/pgtable.c b/arch/arm64/kvm/hyp/pgtable.c
index fee282f8690d..ad18ce469041 100644
--- a/arch/arm64/kvm/hyp/pgtable.c
+++ b/arch/arm64/kvm/hyp/pgtable.c
@@ -782,6 +782,32 @@ bool kvm_pgtable_stage2_is_young(struct kvm_pgtable *pgt, u64 addr)
 	return pte & KVM_PTE_LEAF_ATTR_LO_S2_AF;
 }
 
+static int stage2_flush_walker(u64 addr, u64 end, u32 level, kvm_pte_t *ptep,
+			       enum kvm_pgtable_walk_flags flag,
+			       void * const arg)
+{
+	kvm_pte_t pte = *ptep;
+
+	if (!kvm_pte_valid(pte) || !stage2_pte_cacheable(pte))
+		return 0;
+
+	stage2_flush_dcache(kvm_pte_follow(pte), kvm_granule_size(level));
+	return 0;
+}
+
+int kvm_pgtable_stage2_flush(struct kvm_pgtable *pgt, u64 addr, u64 size)
+{
+	struct kvm_pgtable_walker walker = {
+		.cb	= stage2_flush_walker,
+		.flags	= KVM_PGTABLE_WALK_LEAF,
+	};
+
+	if (cpus_have_const_cap(ARM64_HAS_STAGE2_FWB))
+		return 0;
+
+	return kvm_pgtable_walk(pgt, addr, size, &walker);
+}
+
 int kvm_pgtable_stage2_init(struct kvm_pgtable *pgt, struct kvm *kvm)
 {
 	size_t pgd_sz;
-- 
2.28.0.526.ge36021eeef-goog

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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 14/21] KVM: arm64: Add support for stage-2 cache flushing in generic page-table
Date: Mon,  7 Sep 2020 16:23:37 +0100	[thread overview]
Message-ID: <20200907152344.12978-15-will@kernel.org> (raw)
In-Reply-To: <20200907152344.12978-1-will@kernel.org>

From: Quentin Perret <qperret@google.com>

Add support for cache flushing a range of the stage-2 address space to
the generic page-table code.

Cc: Marc Zyngier <maz@kernel.org>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Signed-off-by: Quentin Perret <qperret@google.com>
Signed-off-by: Will Deacon <will@kernel.org>
---
 arch/arm64/include/asm/kvm_pgtable.h | 12 ++++++++++++
 arch/arm64/kvm/hyp/pgtable.c         | 26 ++++++++++++++++++++++++++
 2 files changed, 38 insertions(+)

diff --git a/arch/arm64/include/asm/kvm_pgtable.h b/arch/arm64/include/asm/kvm_pgtable.h
index e9491c91bd06..a776bcf74316 100644
--- a/arch/arm64/include/asm/kvm_pgtable.h
+++ b/arch/arm64/include/asm/kvm_pgtable.h
@@ -228,6 +228,18 @@ kvm_pte_t kvm_pgtable_stage2_mkold(struct kvm_pgtable *pgt, u64 addr);
  */
 bool kvm_pgtable_stage2_is_young(struct kvm_pgtable *pgt, u64 addr);
 
+/**
+ * kvm_pgtable_stage2_flush_range() - Clean and invalidate data cache to Point
+ * 				      of Coherency for guest stage-2 address
+ *				      range.
+ * @pgt:	Page-table structure initialised by kvm_pgtable_stage2_init().
+ * @addr:	Intermediate physical address from which to flush.
+ * @size:	Size of the range.
+ *
+ * Return: 0 on success, negative error code on failure.
+ */
+int kvm_pgtable_stage2_flush(struct kvm_pgtable *pgt, u64 addr, u64 size);
+
 /**
  * kvm_pgtable_walk() - Walk a page-table.
  * @pgt:	Page-table structure initialised by kvm_pgtable_*_init().
diff --git a/arch/arm64/kvm/hyp/pgtable.c b/arch/arm64/kvm/hyp/pgtable.c
index fee282f8690d..ad18ce469041 100644
--- a/arch/arm64/kvm/hyp/pgtable.c
+++ b/arch/arm64/kvm/hyp/pgtable.c
@@ -782,6 +782,32 @@ bool kvm_pgtable_stage2_is_young(struct kvm_pgtable *pgt, u64 addr)
 	return pte & KVM_PTE_LEAF_ATTR_LO_S2_AF;
 }
 
+static int stage2_flush_walker(u64 addr, u64 end, u32 level, kvm_pte_t *ptep,
+			       enum kvm_pgtable_walk_flags flag,
+			       void * const arg)
+{
+	kvm_pte_t pte = *ptep;
+
+	if (!kvm_pte_valid(pte) || !stage2_pte_cacheable(pte))
+		return 0;
+
+	stage2_flush_dcache(kvm_pte_follow(pte), kvm_granule_size(level));
+	return 0;
+}
+
+int kvm_pgtable_stage2_flush(struct kvm_pgtable *pgt, u64 addr, u64 size)
+{
+	struct kvm_pgtable_walker walker = {
+		.cb	= stage2_flush_walker,
+		.flags	= KVM_PGTABLE_WALK_LEAF,
+	};
+
+	if (cpus_have_const_cap(ARM64_HAS_STAGE2_FWB))
+		return 0;
+
+	return kvm_pgtable_walk(pgt, addr, size, &walker);
+}
+
 int kvm_pgtable_stage2_init(struct kvm_pgtable *pgt, struct kvm *kvm)
 {
 	size_t pgd_sz;
-- 
2.28.0.526.ge36021eeef-goog


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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 ` [PATCH v4 08/21] KVM: arm64: Convert kvm_set_spte_hva() " Will Deacon
2020-09-07 15:23   ` 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 ` Will Deacon [this message]
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 ` [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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