[PATCH 1/2] KVM: arm64: vgic: Add memcg accounting to vgic allocations

Subsystems: arm64 port (aarch64 architecture), kernel virtual machine for arm64 (kvm/arm64), the rest

STALE1868d

6 messages, 2 authors, 2021-09-03 · open the first message on its own page

[PATCH 1/2] KVM: arm64: vgic: Add memcg accounting to vgic allocations

From: Jia He <hidden>
Date: 2021-09-02 00:28:25

Inspired by commit 254272ce6505 ("kvm: x86: Add memcg accounting to KVM
allocations"), it would be better to make arm64 vgic consistent with
common kvm codes.

The memory allocations of VM scope should be charged into VM process
cgroup, hence change GFP_KERNEL to GFP_KERNEL_ACCOUNT.

There remained a case in vgic_set_kvm_info() since this allocation is
global, not in VM scope.

Signed-off-by: Jia He <redacted>
---
 arch/arm64/kvm/vgic/vgic-debug.c   |  2 +-
 arch/arm64/kvm/vgic/vgic-init.c    |  2 +-
 arch/arm64/kvm/vgic/vgic-irqfd.c   |  2 +-
 arch/arm64/kvm/vgic/vgic-its.c     | 14 +++++++-------
 arch/arm64/kvm/vgic/vgic-mmio-v3.c |  2 +-
 arch/arm64/kvm/vgic/vgic-v4.c      |  2 +-
 6 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/arch/arm64/kvm/vgic/vgic-debug.c b/arch/arm64/kvm/vgic/vgic-debug.c
index f38c40a76251..e6a01f210df9 100644
--- a/arch/arm64/kvm/vgic/vgic-debug.c
+++ b/arch/arm64/kvm/vgic/vgic-debug.c

@@ -92,7 +92,7 @@ static void *vgic_debug_start(struct seq_file *s, loff_t *pos)
 		goto out;
 	}
 
-	iter = kmalloc(sizeof(*iter), GFP_KERNEL);
+	iter = kmalloc(sizeof(*iter), GFP_KERNEL_ACCOUNT);
 	if (!iter) {
 		iter = ERR_PTR(-ENOMEM);
 		goto out;

diff --git a/arch/arm64/kvm/vgic/vgic-init.c b/arch/arm64/kvm/vgic/vgic-init.c
index 340c51d87677..0a06d0648970 100644
--- a/arch/arm64/kvm/vgic/vgic-init.c
+++ b/arch/arm64/kvm/vgic/vgic-init.c

@@ -134,7 +134,7 @@ static int kvm_vgic_dist_init(struct kvm *kvm, unsigned int nr_spis)
 	struct kvm_vcpu *vcpu0 = kvm_get_vcpu(kvm, 0);
 	int i;
 
-	dist->spis = kcalloc(nr_spis, sizeof(struct vgic_irq), GFP_KERNEL);
+	dist->spis = kcalloc(nr_spis, sizeof(struct vgic_irq), GFP_KERNEL_ACCOUNT);
 	if (!dist->spis)
 		return  -ENOMEM;

diff --git a/arch/arm64/kvm/vgic/vgic-irqfd.c b/arch/arm64/kvm/vgic/vgic-irqfd.c
index 79f8899b234c..475059bacedf 100644
--- a/arch/arm64/kvm/vgic/vgic-irqfd.c
+++ b/arch/arm64/kvm/vgic/vgic-irqfd.c

@@ -139,7 +139,7 @@ int kvm_vgic_setup_default_irq_routing(struct kvm *kvm)
 	u32 nr = dist->nr_spis;
 	int i, ret;
 
-	entries = kcalloc(nr, sizeof(*entries), GFP_KERNEL);
+	entries = kcalloc(nr, sizeof(*entries), GFP_KERNEL_ACCOUNT);
 	if (!entries)
 		return -ENOMEM;

diff --git a/arch/arm64/kvm/vgic/vgic-its.c b/arch/arm64/kvm/vgic/vgic-its.c
index 61728c543eb9..b99f47103056 100644
--- a/arch/arm64/kvm/vgic/vgic-its.c
+++ b/arch/arm64/kvm/vgic/vgic-its.c

@@ -48,7 +48,7 @@ static struct vgic_irq *vgic_add_lpi(struct kvm *kvm, u32 intid,
 	if (irq)
 		return irq;
 
-	irq = kzalloc(sizeof(struct vgic_irq), GFP_KERNEL);
+	irq = kzalloc(sizeof(struct vgic_irq), GFP_KERNEL_ACCOUNT);
 	if (!irq)
 		return ERR_PTR(-ENOMEM);

@@ -332,7 +332,7 @@ int vgic_copy_lpi_list(struct kvm *kvm, struct kvm_vcpu *vcpu, u32 **intid_ptr)
 	 * we must be careful not to overrun the array.
 	 */
 	irq_count = READ_ONCE(dist->lpi_list_count);
-	intids = kmalloc_array(irq_count, sizeof(intids[0]), GFP_KERNEL);
+	intids = kmalloc_array(irq_count, sizeof(intids[0]), GFP_KERNEL_ACCOUNT);
 	if (!intids)
 		return -ENOMEM;

@@ -985,7 +985,7 @@ static int vgic_its_alloc_collection(struct vgic_its *its,
 	if (!vgic_its_check_id(its, its->baser_coll_table, coll_id, NULL))
 		return E_ITS_MAPC_COLLECTION_OOR;
 
-	collection = kzalloc(sizeof(*collection), GFP_KERNEL);
+	collection = kzalloc(sizeof(*collection), GFP_KERNEL_ACCOUNT);
 	if (!collection)
 		return -ENOMEM;

@@ -1029,7 +1029,7 @@ static struct its_ite *vgic_its_alloc_ite(struct its_device *device,
 {
 	struct its_ite *ite;
 
-	ite = kzalloc(sizeof(*ite), GFP_KERNEL);
+	ite = kzalloc(sizeof(*ite), GFP_KERNEL_ACCOUNT);
 	if (!ite)
 		return ERR_PTR(-ENOMEM);

@@ -1150,7 +1150,7 @@ static struct its_device *vgic_its_alloc_device(struct vgic_its *its,
 {
 	struct its_device *device;
 
-	device = kzalloc(sizeof(*device), GFP_KERNEL);
+	device = kzalloc(sizeof(*device), GFP_KERNEL_ACCOUNT);
 	if (!device)
 		return ERR_PTR(-ENOMEM);

@@ -1847,7 +1847,7 @@ void vgic_lpi_translation_cache_init(struct kvm *kvm)
 		struct vgic_translation_cache_entry *cte;
 
 		/* An allocation failure is not fatal */
-		cte = kzalloc(sizeof(*cte), GFP_KERNEL);
+		cte = kzalloc(sizeof(*cte), GFP_KERNEL_ACCOUNT);
 		if (WARN_ON(!cte))
 			break;

@@ -1888,7 +1888,7 @@ static int vgic_its_create(struct kvm_device *dev, u32 type)
 	if (type != KVM_DEV_TYPE_ARM_VGIC_ITS)
 		return -ENODEV;
 
-	its = kzalloc(sizeof(struct vgic_its), GFP_KERNEL);
+	its = kzalloc(sizeof(struct vgic_its), GFP_KERNEL_ACCOUNT);
 	if (!its)
 		return -ENOMEM;

diff --git a/arch/arm64/kvm/vgic/vgic-mmio-v3.c b/arch/arm64/kvm/vgic/vgic-mmio-v3.c
index a09cdc0b953c..d3fd8a6c0c9a 100644
--- a/arch/arm64/kvm/vgic/vgic-mmio-v3.c
+++ b/arch/arm64/kvm/vgic/vgic-mmio-v3.c

@@ -834,7 +834,7 @@ static int vgic_v3_alloc_redist_region(struct kvm *kvm, uint32_t index,
 	if (vgic_v3_rdist_overlap(kvm, base, size))
 		return -EINVAL;
 
-	rdreg = kzalloc(sizeof(*rdreg), GFP_KERNEL);
+	rdreg = kzalloc(sizeof(*rdreg), GFP_KERNEL_ACCOUNT);
 	if (!rdreg)
 		return -ENOMEM;

diff --git a/arch/arm64/kvm/vgic/vgic-v4.c b/arch/arm64/kvm/vgic/vgic-v4.c
index c1845d8f5f7e..772dd15a22c7 100644
--- a/arch/arm64/kvm/vgic/vgic-v4.c
+++ b/arch/arm64/kvm/vgic/vgic-v4.c

@@ -246,7 +246,7 @@ int vgic_v4_init(struct kvm *kvm)
 	nr_vcpus = atomic_read(&kvm->online_vcpus);
 
 	dist->its_vm.vpes = kcalloc(nr_vcpus, sizeof(*dist->its_vm.vpes),
-				    GFP_KERNEL);
+				    GFP_KERNEL_ACCOUNT);
 	if (!dist->its_vm.vpes)
 		return -ENOMEM;

-- 
2.17.1


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[PATCH 2/2] KVM: arm64: Add memcg accounting to KVM allocations

From: Jia He <hidden>
Date: 2021-09-02 00:28:27

Inspired by commit 254272ce6505 ("kvm: x86: Add memcg accounting to KVM
allocations"), it would be better to make arm64 KVM consistent with
common kvm codes.

The memory allocations of VM scope should be charged into VM process
cgroup, hence change GFP_KERNEL to GFP_KERNEL_ACCOUNT.

There remained a few cases since these allocations are global, not in VM
scope.

Signed-off-by: Jia He <redacted>
---
 arch/arm64/kvm/arm.c      | 6 ++++--
 arch/arm64/kvm/mmu.c      | 2 +-
 arch/arm64/kvm/pmu-emul.c | 2 +-
 arch/arm64/kvm/reset.c    | 2 +-
 4 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index e9a2b8f27792..9d6f5bcaddef 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c

@@ -289,10 +289,12 @@ long kvm_arch_dev_ioctl(struct file *filp,
 
 struct kvm *kvm_arch_alloc_vm(void)
 {
+	unsigned long sz = sizeof(struct kvm);
+
 	if (!has_vhe())
-		return kzalloc(sizeof(struct kvm), GFP_KERNEL);
+		return kzalloc(sz, GFP_KERNEL | GFP_KERNEL_ACCOUNT);
 
-	return vzalloc(sizeof(struct kvm));
+	return __vmalloc(sz, GFP_KERNEL_ACCOUNT | __GFP_HIGHMEM | __GFP_ZERO);
 }
 
 void kvm_arch_free_vm(struct kvm *kvm)

diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c
index 3155c9e778f0..b5cfd9ba650c 100644
--- a/arch/arm64/kvm/mmu.c
+++ b/arch/arm64/kvm/mmu.c

@@ -465,7 +465,7 @@ int kvm_init_stage2_mmu(struct kvm *kvm, struct kvm_s2_mmu *mmu)
 		return -EINVAL;
 	}
 
-	pgt = kzalloc(sizeof(*pgt), GFP_KERNEL);
+	pgt = kzalloc(sizeof(*pgt), GFP_KERNEL_ACCOUNT);
 	if (!pgt)
 		return -ENOMEM;

diff --git a/arch/arm64/kvm/pmu-emul.c b/arch/arm64/kvm/pmu-emul.c
index f33825c995cb..05d42f6b89e4 100644
--- a/arch/arm64/kvm/pmu-emul.c
+++ b/arch/arm64/kvm/pmu-emul.c

@@ -971,7 +971,7 @@ int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr)
 		mutex_lock(&vcpu->kvm->lock);
 
 		if (!vcpu->kvm->arch.pmu_filter) {
-			vcpu->kvm->arch.pmu_filter = bitmap_alloc(nr_events, GFP_KERNEL);
+			vcpu->kvm->arch.pmu_filter = bitmap_alloc(nr_events, GFP_KERNEL_ACCOUNT);
 			if (!vcpu->kvm->arch.pmu_filter) {
 				mutex_unlock(&vcpu->kvm->lock);
 				return -ENOMEM;

diff --git a/arch/arm64/kvm/reset.c b/arch/arm64/kvm/reset.c
index cba7872d69a8..608c1baaaa63 100644
--- a/arch/arm64/kvm/reset.c
+++ b/arch/arm64/kvm/reset.c

@@ -106,7 +106,7 @@ static int kvm_vcpu_finalize_sve(struct kvm_vcpu *vcpu)
 		    vl > SVE_VL_ARCH_MAX))
 		return -EIO;
 
-	buf = kzalloc(SVE_SIG_REGS_SIZE(sve_vq_from_vl(vl)), GFP_KERNEL);
+	buf = kzalloc(SVE_SIG_REGS_SIZE(sve_vq_from_vl(vl)), GFP_KERNEL_ACCOUNT);
 	if (!buf)
 		return -ENOMEM;

-- 
2.17.1


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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [PATCH 1/2] KVM: arm64: vgic: Add memcg accounting to vgic allocations

From: Marc Zyngier <maz@kernel.org>
Date: 2021-09-02 18:03:38

Jia,

Once again: please add a cover letter when you have a patch
series. It isn't rocket science, and Git will do it for you.

On Thu, 02 Sep 2021 01:28:00 +0100,
Jia He [off-list ref] wrote:

quoted hunk

Inspired by commit 254272ce6505 ("kvm: x86: Add memcg accounting to KVM
allocations"), it would be better to make arm64 vgic consistent with
common kvm codes.

The memory allocations of VM scope should be charged into VM process
cgroup, hence change GFP_KERNEL to GFP_KERNEL_ACCOUNT.

There remained a case in vgic_set_kvm_info() since this allocation is
global, not in VM scope.

Signed-off-by: Jia He <redacted>
---
 arch/arm64/kvm/vgic/vgic-debug.c   |  2 +-
 arch/arm64/kvm/vgic/vgic-init.c    |  2 +-
 arch/arm64/kvm/vgic/vgic-irqfd.c   |  2 +-
 arch/arm64/kvm/vgic/vgic-its.c     | 14 +++++++-------
 arch/arm64/kvm/vgic/vgic-mmio-v3.c |  2 +-
 arch/arm64/kvm/vgic/vgic-v4.c      |  2 +-
 6 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/arch/arm64/kvm/vgic/vgic-debug.c b/arch/arm64/kvm/vgic/vgic-debug.c
index f38c40a76251..e6a01f210df9 100644
--- a/arch/arm64/kvm/vgic/vgic-debug.c
+++ b/arch/arm64/kvm/vgic/vgic-debug.c

@@ -92,7 +92,7 @@ static void *vgic_debug_start(struct seq_file *s, loff_t *pos)
 		goto out;
 	}
 
-	iter = kmalloc(sizeof(*iter), GFP_KERNEL);
+	iter = kmalloc(sizeof(*iter), GFP_KERNEL_ACCOUNT);

This really isn't an allocation made in the context of a VM. I don't
think this hunk belongs here.

Thanks,

	M.

-- 
Without deviation from the norm, progress is not possible.

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

Re: [PATCH 2/2] KVM: arm64: Add memcg accounting to KVM allocations

From: Marc Zyngier <maz@kernel.org>
Date: 2021-09-02 18:11:55

On Thu, 02 Sep 2021 01:28:01 +0100,
Jia He [off-list ref] wrote:

quoted hunk

Inspired by commit 254272ce6505 ("kvm: x86: Add memcg accounting to KVM
allocations"), it would be better to make arm64 KVM consistent with
common kvm codes.

The memory allocations of VM scope should be charged into VM process
cgroup, hence change GFP_KERNEL to GFP_KERNEL_ACCOUNT.

There remained a few cases since these allocations are global, not in VM
scope.

Signed-off-by: Jia He <redacted>
---
 arch/arm64/kvm/arm.c      | 6 ++++--
 arch/arm64/kvm/mmu.c      | 2 +-
 arch/arm64/kvm/pmu-emul.c | 2 +-
 arch/arm64/kvm/reset.c    | 2 +-
 4 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index e9a2b8f27792..9d6f5bcaddef 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c

@@ -289,10 +289,12 @@ long kvm_arch_dev_ioctl(struct file *filp,
 
 struct kvm *kvm_arch_alloc_vm(void)
 {
+	unsigned long sz = sizeof(struct kvm);

If you are going to introduce an extra variable, please use the
correct type (size_t).

quoted hunk

+
 	if (!has_vhe())
-		return kzalloc(sizeof(struct kvm), GFP_KERNEL);
+		return kzalloc(sz, GFP_KERNEL | GFP_KERNEL_ACCOUNT);

Why both GFP_KERNEL and GFP_KERNEL_ACCOUNT?

Thanks,

	M.

-- 
Without deviation from the norm, progress is not possible.

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

RE: [PATCH 1/2] KVM: arm64: vgic: Add memcg accounting to vgic allocations

From: Justin He <hidden>
Date: 2021-09-03 09:19:20

Hi Marc

-----Original Message-----
From: Marc Zyngier <maz@kernel.org>
Sent: Friday, September 3, 2021 2:04 AM
To: Justin He <redacted>
Cc: James Morse <James.Morse@arm.com>; Alexandru Elisei
[off-list ref]; Suzuki Poulose [off-list ref];
Catalin Marinas [off-list ref]; Will Deacon [off-list ref];
Liu Shixin [off-list ref]; Eric Auger [off-list ref];
Kees Cook [off-list ref]; Nick Desaulniers
[off-list ref]; Shenming Lu [off-list ref]; Sami
Tolvanen [off-list ref]; Lorenzo Pieralisi
[off-list ref]; Xiaoming Ni [off-list ref]; Zenghui
Yu [off-list ref]; linux-arm-kernel@lists.infradead.org;
kvmarm@lists.cs.columbia.edu; linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/2] KVM: arm64: vgic: Add memcg accounting to vgic
allocations

Jia,

Once again: please add a cover letter when you have a patch
series. It isn't rocket science, and Git will do it for you.

Okay

On Thu, 02 Sep 2021 01:28:00 +0100,
Jia He [off-list ref] wrote:

quoted

Inspired by commit 254272ce6505 ("kvm: x86: Add memcg accounting to KVM
allocations"), it would be better to make arm64 vgic consistent with
common kvm codes.

The memory allocations of VM scope should be charged into VM process
cgroup, hence change GFP_KERNEL to GFP_KERNEL_ACCOUNT.

There remained a case in vgic_set_kvm_info() since this allocation is
global, not in VM scope.

Signed-off-by: Jia He <redacted>
---
 arch/arm64/kvm/vgic/vgic-debug.c   |  2 +-
 arch/arm64/kvm/vgic/vgic-init.c    |  2 +-
 arch/arm64/kvm/vgic/vgic-irqfd.c   |  2 +-
 arch/arm64/kvm/vgic/vgic-its.c     | 14 +++++++-------
 arch/arm64/kvm/vgic/vgic-mmio-v3.c |  2 +-
 arch/arm64/kvm/vgic/vgic-v4.c      |  2 +-
 6 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/arch/arm64/kvm/vgic/vgic-debug.c b/arch/arm64/kvm/vgic/vgic-

debug.c

quoted

index f38c40a76251..e6a01f210df9 100644

--- a/arch/arm64/kvm/vgic/vgic-debug.c
+++ b/arch/arm64/kvm/vgic/vgic-debug.c

@@ -92,7 +92,7 @@ static void *vgic_debug_start(struct seq_file *s,

loff_t *pos)

quoted

 		goto out;
 	}

-	iter = kmalloc(sizeof(*iter), GFP_KERNEL);
+	iter = kmalloc(sizeof(*iter), GFP_KERNEL_ACCOUNT);

This really isn't an allocation made in the context of a VM. I don't
think this hunk belongs here.

Yes, indeed


--
Cheers,
Justin (Jia He)



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

RE: [PATCH 2/2] KVM: arm64: Add memcg accounting to KVM allocations

From: Justin He <hidden>
Date: 2021-09-03 09:22:10

-----Original Message-----
From: Marc Zyngier <maz@kernel.org>
Sent: Friday, September 3, 2021 2:12 AM
To: Justin He <redacted>
Cc: James Morse <James.Morse@arm.com>; Alexandru Elisei
[off-list ref]; Suzuki Poulose [off-list ref];
Catalin Marinas [off-list ref]; Will Deacon [off-list ref];
Liu Shixin [off-list ref]; Eric Auger [off-list ref];
Kees Cook [off-list ref]; Nick Desaulniers
[off-list ref]; Shenming Lu [off-list ref]; Sami
Tolvanen [off-list ref]; Lorenzo Pieralisi
[off-list ref]; Xiaoming Ni [off-list ref]; Zenghui
Yu [off-list ref]; linux-arm-kernel@lists.infradead.org;
kvmarm@lists.cs.columbia.edu; linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/2] KVM: arm64: Add memcg accounting to KVM
allocations

On Thu, 02 Sep 2021 01:28:01 +0100,
Jia He [off-list ref] wrote:

quoted

Inspired by commit 254272ce6505 ("kvm: x86: Add memcg accounting to KVM
allocations"), it would be better to make arm64 KVM consistent with
common kvm codes.

The memory allocations of VM scope should be charged into VM process
cgroup, hence change GFP_KERNEL to GFP_KERNEL_ACCOUNT.

There remained a few cases since these allocations are global, not in VM
scope.

Signed-off-by: Jia He <redacted>
---
 arch/arm64/kvm/arm.c      | 6 ++++--
 arch/arm64/kvm/mmu.c      | 2 +-
 arch/arm64/kvm/pmu-emul.c | 2 +-
 arch/arm64/kvm/reset.c    | 2 +-
 4 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index e9a2b8f27792..9d6f5bcaddef 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c

@@ -289,10 +289,12 @@ long kvm_arch_dev_ioctl(struct file *filp,

 struct kvm *kvm_arch_alloc_vm(void)
 {
+	unsigned long sz = sizeof(struct kvm);

If you are going to introduce an extra variable, please use the
correct type (size_t).

Okay

quoted

+
 	if (!has_vhe())
-		return kzalloc(sizeof(struct kvm), GFP_KERNEL);
+		return kzalloc(sz, GFP_KERNEL | GFP_KERNEL_ACCOUNT);

Why both GFP_KERNEL and GFP_KERNEL_ACCOUNT?

Urgh, sorry for the mistake.

--
Cheers,
Justin (Jia He)



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