From: Marc Zyngier <maz@kernel.org>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Alexandru Elisei <alexandru.elisei@arm.com>,
Andrew Jones <drjones@redhat.com>,
James Morse <james.morse@arm.com>,
Steven Price <steven.price@arm.com>,
Zenghui Yu <yuzenghui@huawei.com>,
Julien Thierry <julien.thierry.kdev@gmail.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
kernel-team@android.com, linux-arm-kernel@lists.infradead.org,
kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org
Subject: [PATCH 3/4] KVM: arm64: pvtime: Ensure task delay accounting is enabled
Date: Mon, 29 Jun 2020 17:25:18 +0100 [thread overview]
Message-ID: <20200629162519.825200-4-maz@kernel.org> (raw)
In-Reply-To: <20200629162519.825200-1-maz@kernel.org>
From: Andrew Jones <drjones@redhat.com>
Ensure we're actually accounting run_delay before we claim that we'll
expose it to the guest. If we're not, then we just pretend like steal
time isn't supported in order to avoid any confusion.
Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200622142710.18677-1-drjones@redhat.com
---
arch/arm64/kvm/pvtime.c | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)
diff --git a/arch/arm64/kvm/pvtime.c b/arch/arm64/kvm/pvtime.c
index 1e0f4c284888..f7b52ce1557e 100644
--- a/arch/arm64/kvm/pvtime.c
+++ b/arch/arm64/kvm/pvtime.c
@@ -3,6 +3,7 @@
#include <linux/arm-smccc.h>
#include <linux/kvm_host.h>
+#include <linux/sched/stat.h>
#include <asm/kvm_mmu.h>
#include <asm/pvclock-abi.h>
@@ -73,6 +74,11 @@ gpa_t kvm_init_stolen_time(struct kvm_vcpu *vcpu)
return base;
}
+static bool kvm_arm_pvtime_supported(void)
+{
+ return !!sched_info_on();
+}
+
int kvm_arm_pvtime_set_attr(struct kvm_vcpu *vcpu,
struct kvm_device_attr *attr)
{
@@ -82,7 +88,8 @@ int kvm_arm_pvtime_set_attr(struct kvm_vcpu *vcpu,
int ret = 0;
int idx;
- if (attr->attr != KVM_ARM_VCPU_PVTIME_IPA)
+ if (!kvm_arm_pvtime_supported() ||
+ attr->attr != KVM_ARM_VCPU_PVTIME_IPA)
return -ENXIO;
if (get_user(ipa, user))
@@ -110,7 +117,8 @@ int kvm_arm_pvtime_get_attr(struct kvm_vcpu *vcpu,
u64 __user *user = (u64 __user *)attr->addr;
u64 ipa;
- if (attr->attr != KVM_ARM_VCPU_PVTIME_IPA)
+ if (!kvm_arm_pvtime_supported() ||
+ attr->attr != KVM_ARM_VCPU_PVTIME_IPA)
return -ENXIO;
ipa = vcpu->arch.steal.base;
@@ -125,7 +133,8 @@ int kvm_arm_pvtime_has_attr(struct kvm_vcpu *vcpu,
{
switch (attr->attr) {
case KVM_ARM_VCPU_PVTIME_IPA:
- return 0;
+ if (kvm_arm_pvtime_supported())
+ return 0;
}
return -ENXIO;
}
--
2.27.0
WARNING: multiple messages have this Message-ID (diff)
From: Marc Zyngier <maz@kernel.org>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: kvm@vger.kernel.org, kernel-team@android.com,
Steven Price <steven.price@arm.com>,
linux-arm-kernel@lists.infradead.org,
kvmarm@lists.cs.columbia.edu
Subject: [PATCH 3/4] KVM: arm64: pvtime: Ensure task delay accounting is enabled
Date: Mon, 29 Jun 2020 17:25:18 +0100 [thread overview]
Message-ID: <20200629162519.825200-4-maz@kernel.org> (raw)
In-Reply-To: <20200629162519.825200-1-maz@kernel.org>
From: Andrew Jones <drjones@redhat.com>
Ensure we're actually accounting run_delay before we claim that we'll
expose it to the guest. If we're not, then we just pretend like steal
time isn't supported in order to avoid any confusion.
Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200622142710.18677-1-drjones@redhat.com
---
arch/arm64/kvm/pvtime.c | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)
diff --git a/arch/arm64/kvm/pvtime.c b/arch/arm64/kvm/pvtime.c
index 1e0f4c284888..f7b52ce1557e 100644
--- a/arch/arm64/kvm/pvtime.c
+++ b/arch/arm64/kvm/pvtime.c
@@ -3,6 +3,7 @@
#include <linux/arm-smccc.h>
#include <linux/kvm_host.h>
+#include <linux/sched/stat.h>
#include <asm/kvm_mmu.h>
#include <asm/pvclock-abi.h>
@@ -73,6 +74,11 @@ gpa_t kvm_init_stolen_time(struct kvm_vcpu *vcpu)
return base;
}
+static bool kvm_arm_pvtime_supported(void)
+{
+ return !!sched_info_on();
+}
+
int kvm_arm_pvtime_set_attr(struct kvm_vcpu *vcpu,
struct kvm_device_attr *attr)
{
@@ -82,7 +88,8 @@ int kvm_arm_pvtime_set_attr(struct kvm_vcpu *vcpu,
int ret = 0;
int idx;
- if (attr->attr != KVM_ARM_VCPU_PVTIME_IPA)
+ if (!kvm_arm_pvtime_supported() ||
+ attr->attr != KVM_ARM_VCPU_PVTIME_IPA)
return -ENXIO;
if (get_user(ipa, user))
@@ -110,7 +117,8 @@ int kvm_arm_pvtime_get_attr(struct kvm_vcpu *vcpu,
u64 __user *user = (u64 __user *)attr->addr;
u64 ipa;
- if (attr->attr != KVM_ARM_VCPU_PVTIME_IPA)
+ if (!kvm_arm_pvtime_supported() ||
+ attr->attr != KVM_ARM_VCPU_PVTIME_IPA)
return -ENXIO;
ipa = vcpu->arch.steal.base;
@@ -125,7 +133,8 @@ int kvm_arm_pvtime_has_attr(struct kvm_vcpu *vcpu,
{
switch (attr->attr) {
case KVM_ARM_VCPU_PVTIME_IPA:
- return 0;
+ if (kvm_arm_pvtime_supported())
+ return 0;
}
return -ENXIO;
}
--
2.27.0
_______________________________________________
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: Paolo Bonzini <pbonzini@redhat.com>
Cc: Andrew Jones <drjones@redhat.com>,
kvm@vger.kernel.org, Suzuki K Poulose <suzuki.poulose@arm.com>,
kernel-team@android.com, Steven Price <steven.price@arm.com>,
James Morse <james.morse@arm.com>,
linux-arm-kernel@lists.infradead.org,
Zenghui Yu <yuzenghui@huawei.com>,
Alexandru Elisei <alexandru.elisei@arm.com>,
kvmarm@lists.cs.columbia.edu,
Julien Thierry <julien.thierry.kdev@gmail.com>
Subject: [PATCH 3/4] KVM: arm64: pvtime: Ensure task delay accounting is enabled
Date: Mon, 29 Jun 2020 17:25:18 +0100 [thread overview]
Message-ID: <20200629162519.825200-4-maz@kernel.org> (raw)
In-Reply-To: <20200629162519.825200-1-maz@kernel.org>
From: Andrew Jones <drjones@redhat.com>
Ensure we're actually accounting run_delay before we claim that we'll
expose it to the guest. If we're not, then we just pretend like steal
time isn't supported in order to avoid any confusion.
Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200622142710.18677-1-drjones@redhat.com
---
arch/arm64/kvm/pvtime.c | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)
diff --git a/arch/arm64/kvm/pvtime.c b/arch/arm64/kvm/pvtime.c
index 1e0f4c284888..f7b52ce1557e 100644
--- a/arch/arm64/kvm/pvtime.c
+++ b/arch/arm64/kvm/pvtime.c
@@ -3,6 +3,7 @@
#include <linux/arm-smccc.h>
#include <linux/kvm_host.h>
+#include <linux/sched/stat.h>
#include <asm/kvm_mmu.h>
#include <asm/pvclock-abi.h>
@@ -73,6 +74,11 @@ gpa_t kvm_init_stolen_time(struct kvm_vcpu *vcpu)
return base;
}
+static bool kvm_arm_pvtime_supported(void)
+{
+ return !!sched_info_on();
+}
+
int kvm_arm_pvtime_set_attr(struct kvm_vcpu *vcpu,
struct kvm_device_attr *attr)
{
@@ -82,7 +88,8 @@ int kvm_arm_pvtime_set_attr(struct kvm_vcpu *vcpu,
int ret = 0;
int idx;
- if (attr->attr != KVM_ARM_VCPU_PVTIME_IPA)
+ if (!kvm_arm_pvtime_supported() ||
+ attr->attr != KVM_ARM_VCPU_PVTIME_IPA)
return -ENXIO;
if (get_user(ipa, user))
@@ -110,7 +117,8 @@ int kvm_arm_pvtime_get_attr(struct kvm_vcpu *vcpu,
u64 __user *user = (u64 __user *)attr->addr;
u64 ipa;
- if (attr->attr != KVM_ARM_VCPU_PVTIME_IPA)
+ if (!kvm_arm_pvtime_supported() ||
+ attr->attr != KVM_ARM_VCPU_PVTIME_IPA)
return -ENXIO;
ipa = vcpu->arch.steal.base;
@@ -125,7 +133,8 @@ int kvm_arm_pvtime_has_attr(struct kvm_vcpu *vcpu,
{
switch (attr->attr) {
case KVM_ARM_VCPU_PVTIME_IPA:
- return 0;
+ if (kvm_arm_pvtime_supported())
+ return 0;
}
return -ENXIO;
}
--
2.27.0
_______________________________________________
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:[~2020-06-29 21:16 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-29 16:25 [GIT PULL] KVM/arm64 fixes for 5.8, take #2 Marc Zyngier
2020-06-29 16:25 ` Marc Zyngier
2020-06-29 16:25 ` Marc Zyngier
2020-06-29 16:25 ` [PATCH 1/4] KVM: arm64: Annotate hyp NMI-related functions as __always_inline Marc Zyngier
2020-06-29 16:25 ` Marc Zyngier
2020-06-29 16:25 ` Marc Zyngier
2020-06-29 16:25 ` [PATCH 2/4] KVM: arm64: Fix kvm_reset_vcpu() return code being incorrect with SVE Marc Zyngier
2020-06-29 16:25 ` Marc Zyngier
2020-06-29 16:25 ` Marc Zyngier
2020-06-29 16:25 ` Marc Zyngier [this message]
2020-06-29 16:25 ` [PATCH 3/4] KVM: arm64: pvtime: Ensure task delay accounting is enabled Marc Zyngier
2020-06-29 16:25 ` Marc Zyngier
2020-06-29 16:25 ` [PATCH 4/4] KVM: arm64: vgic-v4: Plug race between non-residency and v4.1 doorbell Marc Zyngier
2020-06-29 16:25 ` Marc Zyngier
2020-06-29 16:25 ` Marc Zyngier
2020-07-01 14:24 ` [GIT PULL] KVM/arm64 fixes for 5.8, take #2 Paolo Bonzini
2020-07-01 14:24 ` Paolo Bonzini
2020-07-01 14:24 ` Paolo Bonzini
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