From: Shannon Zhao <zhaoshenglong@huawei.com>
To: <kvmarm@lists.cs.columbia.edu>, <marc.zyngier@arm.com>,
<christoffer.dall@linaro.org>
Cc: kvm@vger.kernel.org, will.deacon@arm.com,
linux-arm-kernel@lists.infradead.org, shannon.zhao@linaro.org
Subject: [PATCH v9 10/21] KVM: ARM64: Add access handler for PMCNTENSET and PMCNTENCLR register
Date: Fri, 15 Jan 2016 14:27:44 +0800 [thread overview]
Message-ID: <1452839275-19368-11-git-send-email-zhaoshenglong@huawei.com> (raw)
In-Reply-To: <1452839275-19368-1-git-send-email-zhaoshenglong@huawei.com>
From: Shannon Zhao <shannon.zhao@linaro.org>
Since the reset value of PMCNTENSET and PMCNTENCLR is UNKNOWN, use
reset_unknown for its reset handler. Add a handler to emulate writing
PMCNTENSET or PMCNTENCLR register.
When writing to PMCNTENSET, call perf_event_enable to enable the perf
event. When writing to PMCNTENCLR, call perf_event_disable to disable
the perf event.
Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org>
---
arch/arm64/kvm/sys_regs.c | 35 +++++++++++++++++++++++---
include/kvm/arm_pmu.h | 9 +++++++
virt/kvm/arm/pmu.c | 63 +++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 103 insertions(+), 4 deletions(-)
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index 6a50262..d43a9a4 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -603,6 +603,33 @@ static bool access_pmu_evcntr(struct kvm_vcpu *vcpu,
return true;
}
+static bool access_pmcnten(struct kvm_vcpu *vcpu, struct sys_reg_params *p,
+ const struct sys_reg_desc *r)
+{
+ u64 val, mask;
+
+ if (!kvm_arm_pmu_v3_ready(vcpu))
+ return trap_raz_wi(vcpu, p, r);
+
+ mask = kvm_pmu_valid_counter_mask(vcpu);
+ if (p->is_write) {
+ val = p->regval & mask;
+ if (r->Op2 & 0x1) {
+ /* accessing PMCNTENSET_EL0 */
+ vcpu_sys_reg(vcpu, PMCNTENSET_EL0) |= val;
+ kvm_pmu_enable_counter(vcpu, val);
+ } else {
+ /* accessing PMCNTENCLR_EL0 */
+ vcpu_sys_reg(vcpu, PMCNTENSET_EL0) &= ~val;
+ kvm_pmu_disable_counter(vcpu, val);
+ }
+ } else {
+ p->regval = vcpu_sys_reg(vcpu, PMCNTENSET_EL0) & mask;
+ }
+
+ return true;
+}
+
/* Silly macro to expand the DBG{BCR,BVR,WVR,WCR}n_EL1 registers in one go */
#define DBG_BCR_BVR_WCR_WVR_EL1(n) \
/* DBGBVRn_EL1 */ \
@@ -804,10 +831,10 @@ static const struct sys_reg_desc sys_reg_descs[] = {
access_pmcr, reset_pmcr, },
/* PMCNTENSET_EL0 */
{ Op0(0b11), Op1(0b011), CRn(0b1001), CRm(0b1100), Op2(0b001),
- trap_raz_wi },
+ access_pmcnten, reset_unknown, PMCNTENSET_EL0 },
/* PMCNTENCLR_EL0 */
{ Op0(0b11), Op1(0b011), CRn(0b1001), CRm(0b1100), Op2(0b010),
- trap_raz_wi },
+ access_pmcnten, NULL, PMCNTENSET_EL0 },
/* PMOVSCLR_EL0 */
{ Op0(0b11), Op1(0b011), CRn(0b1001), CRm(0b1100), Op2(0b011),
trap_raz_wi },
@@ -1149,8 +1176,8 @@ static const struct sys_reg_desc cp15_regs[] = {
/* PMU */
{ Op1( 0), CRn( 9), CRm(12), Op2( 0), access_pmcr },
- { Op1( 0), CRn( 9), CRm(12), Op2( 1), trap_raz_wi },
- { Op1( 0), CRn( 9), CRm(12), Op2( 2), trap_raz_wi },
+ { Op1( 0), CRn( 9), CRm(12), Op2( 1), access_pmcnten },
+ { Op1( 0), CRn( 9), CRm(12), Op2( 2), access_pmcnten },
{ Op1( 0), CRn( 9), CRm(12), Op2( 3), trap_raz_wi },
{ Op1( 0), CRn( 9), CRm(12), Op2( 5), access_pmselr },
{ Op1( 0), CRn( 9), CRm(12), Op2( 6), access_pmceid },
diff --git a/include/kvm/arm_pmu.h b/include/kvm/arm_pmu.h
index ee4b15c..a7e5485 100644
--- a/include/kvm/arm_pmu.h
+++ b/include/kvm/arm_pmu.h
@@ -37,6 +37,9 @@ struct kvm_pmu {
#define kvm_arm_pmu_v3_ready(v) ((v)->arch.pmu.ready)
u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, u64 select_idx);
+u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu);
+void kvm_pmu_disable_counter(struct kvm_vcpu *vcpu, u64 val);
+void kvm_pmu_enable_counter(struct kvm_vcpu *vcpu, u64 val);
void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu, u64 data,
u64 select_idx);
#else
@@ -49,6 +52,12 @@ static inline u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu,
{
return 0;
}
+static inline u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu)
+{
+ return 0;
+}
+static inline void kvm_pmu_disable_counter(struct kvm_vcpu *vcpu, u64 val) {}
+static inline void kvm_pmu_enable_counter(struct kvm_vcpu *vcpu, u64 val) {}
static inline void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu,
u64 data, u64 select_idx) {}
#endif
diff --git a/virt/kvm/arm/pmu.c b/virt/kvm/arm/pmu.c
index 673ec55..0873977 100644
--- a/virt/kvm/arm/pmu.c
+++ b/virt/kvm/arm/pmu.c
@@ -68,6 +68,69 @@ static void kvm_pmu_stop_counter(struct kvm_vcpu *vcpu, struct kvm_pmc *pmc)
}
}
+u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu)
+{
+ u64 val = vcpu_sys_reg(vcpu, PMCR_EL0) >> ARMV8_PMCR_N_SHIFT;
+
+ val &= ARMV8_PMCR_N_MASK;
+ return GENMASK(val - 1, 0) | BIT(ARMV8_CYCLE_IDX);
+}
+
+/**
+ * kvm_pmu_enable_counter - enable selected PMU counter
+ * @vcpu: The vcpu pointer
+ * @val: the value guest writes to PMCNTENSET register
+ *
+ * Call perf_event_enable to start counting the perf event
+ */
+void kvm_pmu_enable_counter(struct kvm_vcpu *vcpu, u64 val)
+{
+ int i;
+ struct kvm_pmu *pmu = &vcpu->arch.pmu;
+ struct kvm_pmc *pmc;
+
+ if (!(vcpu_sys_reg(vcpu, PMCR_EL0) & ARMV8_PMCR_E) || !val)
+ return;
+
+ for (i = 0; i < ARMV8_MAX_COUNTERS; i++) {
+ if (!(val & BIT(i)))
+ continue;
+
+ pmc = &pmu->pmc[i];
+ if (pmc->perf_event) {
+ perf_event_enable(pmc->perf_event);
+ if (pmc->perf_event->state != PERF_EVENT_STATE_ACTIVE)
+ kvm_debug("fail to enable perf event\n");
+ }
+ }
+}
+
+/**
+ * kvm_pmu_disable_counter - disable selected PMU counter
+ * @vcpu: The vcpu pointer
+ * @val: the value guest writes to PMCNTENCLR register
+ *
+ * Call perf_event_disable to stop counting the perf event
+ */
+void kvm_pmu_disable_counter(struct kvm_vcpu *vcpu, u64 val)
+{
+ int i;
+ struct kvm_pmu *pmu = &vcpu->arch.pmu;
+ struct kvm_pmc *pmc;
+
+ if (!val)
+ return;
+
+ for (i = 0; i < ARMV8_MAX_COUNTERS; i++) {
+ if (!(val & BIT(i)))
+ continue;
+
+ pmc = &pmu->pmc[i];
+ if (pmc->perf_event)
+ perf_event_disable(pmc->perf_event);
+ }
+}
+
static bool kvm_pmu_counter_is_enabled(struct kvm_vcpu *vcpu, u64 select_idx)
{
return (vcpu_sys_reg(vcpu, PMCR_EL0) & ARMV8_PMCR_E) &&
--
2.0.4
WARNING: multiple messages have this Message-ID (diff)
From: Shannon Zhao <zhaoshenglong@huawei.com>
To: kvmarm@lists.cs.columbia.edu, marc.zyngier@arm.com,
christoffer.dall@linaro.org
Cc: kvm@vger.kernel.org, will.deacon@arm.com,
linux-arm-kernel@lists.infradead.org, shannon.zhao@linaro.org
Subject: [PATCH v9 10/21] KVM: ARM64: Add access handler for PMCNTENSET and PMCNTENCLR register
Date: Fri, 15 Jan 2016 14:27:44 +0800 [thread overview]
Message-ID: <1452839275-19368-11-git-send-email-zhaoshenglong@huawei.com> (raw)
In-Reply-To: <1452839275-19368-1-git-send-email-zhaoshenglong@huawei.com>
From: Shannon Zhao <shannon.zhao@linaro.org>
Since the reset value of PMCNTENSET and PMCNTENCLR is UNKNOWN, use
reset_unknown for its reset handler. Add a handler to emulate writing
PMCNTENSET or PMCNTENCLR register.
When writing to PMCNTENSET, call perf_event_enable to enable the perf
event. When writing to PMCNTENCLR, call perf_event_disable to disable
the perf event.
Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org>
---
arch/arm64/kvm/sys_regs.c | 35 +++++++++++++++++++++++---
include/kvm/arm_pmu.h | 9 +++++++
virt/kvm/arm/pmu.c | 63 +++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 103 insertions(+), 4 deletions(-)
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index 6a50262..d43a9a4 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -603,6 +603,33 @@ static bool access_pmu_evcntr(struct kvm_vcpu *vcpu,
return true;
}
+static bool access_pmcnten(struct kvm_vcpu *vcpu, struct sys_reg_params *p,
+ const struct sys_reg_desc *r)
+{
+ u64 val, mask;
+
+ if (!kvm_arm_pmu_v3_ready(vcpu))
+ return trap_raz_wi(vcpu, p, r);
+
+ mask = kvm_pmu_valid_counter_mask(vcpu);
+ if (p->is_write) {
+ val = p->regval & mask;
+ if (r->Op2 & 0x1) {
+ /* accessing PMCNTENSET_EL0 */
+ vcpu_sys_reg(vcpu, PMCNTENSET_EL0) |= val;
+ kvm_pmu_enable_counter(vcpu, val);
+ } else {
+ /* accessing PMCNTENCLR_EL0 */
+ vcpu_sys_reg(vcpu, PMCNTENSET_EL0) &= ~val;
+ kvm_pmu_disable_counter(vcpu, val);
+ }
+ } else {
+ p->regval = vcpu_sys_reg(vcpu, PMCNTENSET_EL0) & mask;
+ }
+
+ return true;
+}
+
/* Silly macro to expand the DBG{BCR,BVR,WVR,WCR}n_EL1 registers in one go */
#define DBG_BCR_BVR_WCR_WVR_EL1(n) \
/* DBGBVRn_EL1 */ \
@@ -804,10 +831,10 @@ static const struct sys_reg_desc sys_reg_descs[] = {
access_pmcr, reset_pmcr, },
/* PMCNTENSET_EL0 */
{ Op0(0b11), Op1(0b011), CRn(0b1001), CRm(0b1100), Op2(0b001),
- trap_raz_wi },
+ access_pmcnten, reset_unknown, PMCNTENSET_EL0 },
/* PMCNTENCLR_EL0 */
{ Op0(0b11), Op1(0b011), CRn(0b1001), CRm(0b1100), Op2(0b010),
- trap_raz_wi },
+ access_pmcnten, NULL, PMCNTENSET_EL0 },
/* PMOVSCLR_EL0 */
{ Op0(0b11), Op1(0b011), CRn(0b1001), CRm(0b1100), Op2(0b011),
trap_raz_wi },
@@ -1149,8 +1176,8 @@ static const struct sys_reg_desc cp15_regs[] = {
/* PMU */
{ Op1( 0), CRn( 9), CRm(12), Op2( 0), access_pmcr },
- { Op1( 0), CRn( 9), CRm(12), Op2( 1), trap_raz_wi },
- { Op1( 0), CRn( 9), CRm(12), Op2( 2), trap_raz_wi },
+ { Op1( 0), CRn( 9), CRm(12), Op2( 1), access_pmcnten },
+ { Op1( 0), CRn( 9), CRm(12), Op2( 2), access_pmcnten },
{ Op1( 0), CRn( 9), CRm(12), Op2( 3), trap_raz_wi },
{ Op1( 0), CRn( 9), CRm(12), Op2( 5), access_pmselr },
{ Op1( 0), CRn( 9), CRm(12), Op2( 6), access_pmceid },
diff --git a/include/kvm/arm_pmu.h b/include/kvm/arm_pmu.h
index ee4b15c..a7e5485 100644
--- a/include/kvm/arm_pmu.h
+++ b/include/kvm/arm_pmu.h
@@ -37,6 +37,9 @@ struct kvm_pmu {
#define kvm_arm_pmu_v3_ready(v) ((v)->arch.pmu.ready)
u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, u64 select_idx);
+u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu);
+void kvm_pmu_disable_counter(struct kvm_vcpu *vcpu, u64 val);
+void kvm_pmu_enable_counter(struct kvm_vcpu *vcpu, u64 val);
void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu, u64 data,
u64 select_idx);
#else
@@ -49,6 +52,12 @@ static inline u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu,
{
return 0;
}
+static inline u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu)
+{
+ return 0;
+}
+static inline void kvm_pmu_disable_counter(struct kvm_vcpu *vcpu, u64 val) {}
+static inline void kvm_pmu_enable_counter(struct kvm_vcpu *vcpu, u64 val) {}
static inline void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu,
u64 data, u64 select_idx) {}
#endif
diff --git a/virt/kvm/arm/pmu.c b/virt/kvm/arm/pmu.c
index 673ec55..0873977 100644
--- a/virt/kvm/arm/pmu.c
+++ b/virt/kvm/arm/pmu.c
@@ -68,6 +68,69 @@ static void kvm_pmu_stop_counter(struct kvm_vcpu *vcpu, struct kvm_pmc *pmc)
}
}
+u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu)
+{
+ u64 val = vcpu_sys_reg(vcpu, PMCR_EL0) >> ARMV8_PMCR_N_SHIFT;
+
+ val &= ARMV8_PMCR_N_MASK;
+ return GENMASK(val - 1, 0) | BIT(ARMV8_CYCLE_IDX);
+}
+
+/**
+ * kvm_pmu_enable_counter - enable selected PMU counter
+ * @vcpu: The vcpu pointer
+ * @val: the value guest writes to PMCNTENSET register
+ *
+ * Call perf_event_enable to start counting the perf event
+ */
+void kvm_pmu_enable_counter(struct kvm_vcpu *vcpu, u64 val)
+{
+ int i;
+ struct kvm_pmu *pmu = &vcpu->arch.pmu;
+ struct kvm_pmc *pmc;
+
+ if (!(vcpu_sys_reg(vcpu, PMCR_EL0) & ARMV8_PMCR_E) || !val)
+ return;
+
+ for (i = 0; i < ARMV8_MAX_COUNTERS; i++) {
+ if (!(val & BIT(i)))
+ continue;
+
+ pmc = &pmu->pmc[i];
+ if (pmc->perf_event) {
+ perf_event_enable(pmc->perf_event);
+ if (pmc->perf_event->state != PERF_EVENT_STATE_ACTIVE)
+ kvm_debug("fail to enable perf event\n");
+ }
+ }
+}
+
+/**
+ * kvm_pmu_disable_counter - disable selected PMU counter
+ * @vcpu: The vcpu pointer
+ * @val: the value guest writes to PMCNTENCLR register
+ *
+ * Call perf_event_disable to stop counting the perf event
+ */
+void kvm_pmu_disable_counter(struct kvm_vcpu *vcpu, u64 val)
+{
+ int i;
+ struct kvm_pmu *pmu = &vcpu->arch.pmu;
+ struct kvm_pmc *pmc;
+
+ if (!val)
+ return;
+
+ for (i = 0; i < ARMV8_MAX_COUNTERS; i++) {
+ if (!(val & BIT(i)))
+ continue;
+
+ pmc = &pmu->pmc[i];
+ if (pmc->perf_event)
+ perf_event_disable(pmc->perf_event);
+ }
+}
+
static bool kvm_pmu_counter_is_enabled(struct kvm_vcpu *vcpu, u64 select_idx)
{
return (vcpu_sys_reg(vcpu, PMCR_EL0) & ARMV8_PMCR_E) &&
--
2.0.4
WARNING: multiple messages have this Message-ID (diff)
From: zhaoshenglong@huawei.com (Shannon Zhao)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v9 10/21] KVM: ARM64: Add access handler for PMCNTENSET and PMCNTENCLR register
Date: Fri, 15 Jan 2016 14:27:44 +0800 [thread overview]
Message-ID: <1452839275-19368-11-git-send-email-zhaoshenglong@huawei.com> (raw)
In-Reply-To: <1452839275-19368-1-git-send-email-zhaoshenglong@huawei.com>
From: Shannon Zhao <shannon.zhao@linaro.org>
Since the reset value of PMCNTENSET and PMCNTENCLR is UNKNOWN, use
reset_unknown for its reset handler. Add a handler to emulate writing
PMCNTENSET or PMCNTENCLR register.
When writing to PMCNTENSET, call perf_event_enable to enable the perf
event. When writing to PMCNTENCLR, call perf_event_disable to disable
the perf event.
Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org>
---
arch/arm64/kvm/sys_regs.c | 35 +++++++++++++++++++++++---
include/kvm/arm_pmu.h | 9 +++++++
virt/kvm/arm/pmu.c | 63 +++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 103 insertions(+), 4 deletions(-)
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index 6a50262..d43a9a4 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -603,6 +603,33 @@ static bool access_pmu_evcntr(struct kvm_vcpu *vcpu,
return true;
}
+static bool access_pmcnten(struct kvm_vcpu *vcpu, struct sys_reg_params *p,
+ const struct sys_reg_desc *r)
+{
+ u64 val, mask;
+
+ if (!kvm_arm_pmu_v3_ready(vcpu))
+ return trap_raz_wi(vcpu, p, r);
+
+ mask = kvm_pmu_valid_counter_mask(vcpu);
+ if (p->is_write) {
+ val = p->regval & mask;
+ if (r->Op2 & 0x1) {
+ /* accessing PMCNTENSET_EL0 */
+ vcpu_sys_reg(vcpu, PMCNTENSET_EL0) |= val;
+ kvm_pmu_enable_counter(vcpu, val);
+ } else {
+ /* accessing PMCNTENCLR_EL0 */
+ vcpu_sys_reg(vcpu, PMCNTENSET_EL0) &= ~val;
+ kvm_pmu_disable_counter(vcpu, val);
+ }
+ } else {
+ p->regval = vcpu_sys_reg(vcpu, PMCNTENSET_EL0) & mask;
+ }
+
+ return true;
+}
+
/* Silly macro to expand the DBG{BCR,BVR,WVR,WCR}n_EL1 registers in one go */
#define DBG_BCR_BVR_WCR_WVR_EL1(n) \
/* DBGBVRn_EL1 */ \
@@ -804,10 +831,10 @@ static const struct sys_reg_desc sys_reg_descs[] = {
access_pmcr, reset_pmcr, },
/* PMCNTENSET_EL0 */
{ Op0(0b11), Op1(0b011), CRn(0b1001), CRm(0b1100), Op2(0b001),
- trap_raz_wi },
+ access_pmcnten, reset_unknown, PMCNTENSET_EL0 },
/* PMCNTENCLR_EL0 */
{ Op0(0b11), Op1(0b011), CRn(0b1001), CRm(0b1100), Op2(0b010),
- trap_raz_wi },
+ access_pmcnten, NULL, PMCNTENSET_EL0 },
/* PMOVSCLR_EL0 */
{ Op0(0b11), Op1(0b011), CRn(0b1001), CRm(0b1100), Op2(0b011),
trap_raz_wi },
@@ -1149,8 +1176,8 @@ static const struct sys_reg_desc cp15_regs[] = {
/* PMU */
{ Op1( 0), CRn( 9), CRm(12), Op2( 0), access_pmcr },
- { Op1( 0), CRn( 9), CRm(12), Op2( 1), trap_raz_wi },
- { Op1( 0), CRn( 9), CRm(12), Op2( 2), trap_raz_wi },
+ { Op1( 0), CRn( 9), CRm(12), Op2( 1), access_pmcnten },
+ { Op1( 0), CRn( 9), CRm(12), Op2( 2), access_pmcnten },
{ Op1( 0), CRn( 9), CRm(12), Op2( 3), trap_raz_wi },
{ Op1( 0), CRn( 9), CRm(12), Op2( 5), access_pmselr },
{ Op1( 0), CRn( 9), CRm(12), Op2( 6), access_pmceid },
diff --git a/include/kvm/arm_pmu.h b/include/kvm/arm_pmu.h
index ee4b15c..a7e5485 100644
--- a/include/kvm/arm_pmu.h
+++ b/include/kvm/arm_pmu.h
@@ -37,6 +37,9 @@ struct kvm_pmu {
#define kvm_arm_pmu_v3_ready(v) ((v)->arch.pmu.ready)
u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, u64 select_idx);
+u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu);
+void kvm_pmu_disable_counter(struct kvm_vcpu *vcpu, u64 val);
+void kvm_pmu_enable_counter(struct kvm_vcpu *vcpu, u64 val);
void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu, u64 data,
u64 select_idx);
#else
@@ -49,6 +52,12 @@ static inline u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu,
{
return 0;
}
+static inline u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu)
+{
+ return 0;
+}
+static inline void kvm_pmu_disable_counter(struct kvm_vcpu *vcpu, u64 val) {}
+static inline void kvm_pmu_enable_counter(struct kvm_vcpu *vcpu, u64 val) {}
static inline void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu,
u64 data, u64 select_idx) {}
#endif
diff --git a/virt/kvm/arm/pmu.c b/virt/kvm/arm/pmu.c
index 673ec55..0873977 100644
--- a/virt/kvm/arm/pmu.c
+++ b/virt/kvm/arm/pmu.c
@@ -68,6 +68,69 @@ static void kvm_pmu_stop_counter(struct kvm_vcpu *vcpu, struct kvm_pmc *pmc)
}
}
+u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu)
+{
+ u64 val = vcpu_sys_reg(vcpu, PMCR_EL0) >> ARMV8_PMCR_N_SHIFT;
+
+ val &= ARMV8_PMCR_N_MASK;
+ return GENMASK(val - 1, 0) | BIT(ARMV8_CYCLE_IDX);
+}
+
+/**
+ * kvm_pmu_enable_counter - enable selected PMU counter
+ * @vcpu: The vcpu pointer
+ * @val: the value guest writes to PMCNTENSET register
+ *
+ * Call perf_event_enable to start counting the perf event
+ */
+void kvm_pmu_enable_counter(struct kvm_vcpu *vcpu, u64 val)
+{
+ int i;
+ struct kvm_pmu *pmu = &vcpu->arch.pmu;
+ struct kvm_pmc *pmc;
+
+ if (!(vcpu_sys_reg(vcpu, PMCR_EL0) & ARMV8_PMCR_E) || !val)
+ return;
+
+ for (i = 0; i < ARMV8_MAX_COUNTERS; i++) {
+ if (!(val & BIT(i)))
+ continue;
+
+ pmc = &pmu->pmc[i];
+ if (pmc->perf_event) {
+ perf_event_enable(pmc->perf_event);
+ if (pmc->perf_event->state != PERF_EVENT_STATE_ACTIVE)
+ kvm_debug("fail to enable perf event\n");
+ }
+ }
+}
+
+/**
+ * kvm_pmu_disable_counter - disable selected PMU counter
+ * @vcpu: The vcpu pointer
+ * @val: the value guest writes to PMCNTENCLR register
+ *
+ * Call perf_event_disable to stop counting the perf event
+ */
+void kvm_pmu_disable_counter(struct kvm_vcpu *vcpu, u64 val)
+{
+ int i;
+ struct kvm_pmu *pmu = &vcpu->arch.pmu;
+ struct kvm_pmc *pmc;
+
+ if (!val)
+ return;
+
+ for (i = 0; i < ARMV8_MAX_COUNTERS; i++) {
+ if (!(val & BIT(i)))
+ continue;
+
+ pmc = &pmu->pmc[i];
+ if (pmc->perf_event)
+ perf_event_disable(pmc->perf_event);
+ }
+}
+
static bool kvm_pmu_counter_is_enabled(struct kvm_vcpu *vcpu, u64 select_idx)
{
return (vcpu_sys_reg(vcpu, PMCR_EL0) & ARMV8_PMCR_E) &&
--
2.0.4
next prev parent reply other threads:[~2016-01-15 6:27 UTC|newest]
Thread overview: 92+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-15 6:27 [PATCH v9 00/21] KVM: ARM64: Add guest PMU support Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` [PATCH v9 01/21] ARM64: Move PMU register related defines to asm/pmu.h Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` [PATCH v9 02/21] KVM: ARM64: Define PMU data structure for each vcpu Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` [PATCH v9 03/21] KVM: ARM64: Add offset defines for PMU registers Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` [PATCH v9 04/21] KVM: ARM64: Add access handler for PMCR register Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` [PATCH v9 05/21] KVM: ARM64: Add access handler for PMSELR register Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` [PATCH v9 06/21] KVM: ARM64: Add access handler for PMCEID0 and PMCEID1 register Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` [PATCH v9 07/21] KVM: ARM64: PMU: Add perf event map and introduce perf event creating function Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` [PATCH v9 08/21] KVM: ARM64: Add access handler for event type register Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` [PATCH v9 09/21] KVM: ARM64: Add access handler for event counter register Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao [this message]
2016-01-15 6:27 ` [PATCH v9 10/21] KVM: ARM64: Add access handler for PMCNTENSET and PMCNTENCLR register Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` [PATCH v9 11/21] KVM: ARM64: Add access handler for PMINTENSET and PMINTENCLR register Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` [PATCH v9 12/21] KVM: ARM64: Add access handler for PMOVSSET and PMOVSCLR register Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` [PATCH v9 13/21] KVM: ARM64: Add access handler for PMSWINC register Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` [PATCH v9 14/21] KVM: ARM64: Add helper to handle PMCR register bits Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` [PATCH v9 15/21] KVM: ARM64: Add access handler for PMUSERENR register Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` [PATCH v9 16/21] KVM: ARM64: Add PMU overflow interrupt routing Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` [PATCH v9 17/21] KVM: ARM64: Reset PMU state when resetting vcpu Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` [PATCH v9 18/21] KVM: ARM64: Free perf event of PMU when destroying vcpu Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` [PATCH v9 19/21] KVM: ARM64: Add a new feature bit for PMUv3 Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 11:08 ` Andrew Jones
2016-01-15 11:08 ` Andrew Jones
2016-01-19 7:10 ` Shannon Zhao
2016-01-19 7:10 ` Shannon Zhao
2016-01-25 16:47 ` Peter Maydell
2016-01-25 16:47 ` Peter Maydell
2016-01-26 3:40 ` Shannon Zhao
2016-01-26 3:40 ` Shannon Zhao
2016-01-26 3:40 ` Shannon Zhao
2016-01-15 6:27 ` [PATCH v9 20/21] KVM: ARM: Introduce per-vcpu kvm device controls Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 11:16 ` Andrew Jones
2016-01-15 11:16 ` Andrew Jones
2016-01-15 6:27 ` [PATCH v9 21/21] KVM: ARM64: Add a new vcpu device control group for PMUv3 Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 6:27 ` Shannon Zhao
2016-01-15 13:28 ` Andrew Jones
2016-01-15 13:28 ` Andrew Jones
2016-01-15 13:58 ` Shannon Zhao
2016-01-15 13:58 ` Shannon Zhao
2016-01-25 16:53 ` Peter Maydell
2016-01-25 16:53 ` Peter Maydell
2016-01-26 3:33 ` Shannon Zhao
2016-01-26 3:33 ` Shannon Zhao
2016-01-26 3:33 ` Shannon Zhao
2016-01-15 13:45 ` [PATCH v9 00/21] KVM: ARM64: Add guest PMU support Andrew Jones
2016-01-15 13:45 ` Andrew Jones
2016-01-15 14:04 ` Shannon Zhao
2016-01-15 14:04 ` Shannon Zhao
2016-01-16 7:33 ` Shannon Zhao
2016-01-16 7:33 ` Shannon Zhao
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