[PATCH 3/5] kvm: arm64: Limit PMU version to ARMv8.1

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From: Marc Zyngier <maz@kernel.org>
To: linux-arm-kernel@lists.infradead.org,
	kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org
Subject: [PATCH 3/5] kvm: arm64: Limit PMU version to ARMv8.1
Date: Sun, 16 Feb 2020 18:53:22 +0000	[thread overview]
Message-ID: <20200216185324.32596-4-maz@kernel.org> (raw)
In-Reply-To: <20200216185324.32596-1-maz@kernel.org>

Our PMU code is only implementing the ARMv8.1 features, so let's
stick to this when reporting the feature set to the guest.

Signed-off-by: Marc Zyngier <maz@kernel.org>
---
 arch/arm64/kvm/sys_regs.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index 682fedd7700f..06b2d0dc6c73 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -1093,6 +1093,11 @@ static u64 read_id_reg(const struct kvm_vcpu *vcpu,
 				 FEATURE(ID_AA64ISAR1_GPA) |
 				 FEATURE(ID_AA64ISAR1_GPI));
 		break;
+	case SYS_ID_AA64DFR0_EL1:
+		/* Limit PMU to ARMv8.1 */
+		val &= ~FEATURE(ID_AA64DFR0_PMUVER);
+		val |= FIELD_PREP(FEATURE(ID_AA64DFR0_PMUVER), 4);
+		break;
 	}
 
 	return val;
-- 
2.20.1

_______________________________________________
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: linux-arm-kernel@lists.infradead.org,
	kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org
Cc: Peter Maydell <peter.maydell@linaro.org>,
	James Morse <james.morse@arm.com>,
	Julien Thierry <julien.thierry.kdev@gmail.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>
Subject: [PATCH 3/5] kvm: arm64: Limit PMU version to ARMv8.1
Date: Sun, 16 Feb 2020 18:53:22 +0000	[thread overview]
Message-ID: <20200216185324.32596-4-maz@kernel.org> (raw)
In-Reply-To: <20200216185324.32596-1-maz@kernel.org>

Our PMU code is only implementing the ARMv8.1 features, so let's
stick to this when reporting the feature set to the guest.

Signed-off-by: Marc Zyngier <maz@kernel.org>
---
 arch/arm64/kvm/sys_regs.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index 682fedd7700f..06b2d0dc6c73 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -1093,6 +1093,11 @@ static u64 read_id_reg(const struct kvm_vcpu *vcpu,
 				 FEATURE(ID_AA64ISAR1_GPA) |
 				 FEATURE(ID_AA64ISAR1_GPI));
 		break;
+	case SYS_ID_AA64DFR0_EL1:
+		/* Limit PMU to ARMv8.1 */
+		val &= ~FEATURE(ID_AA64DFR0_PMUVER);
+		val |= FIELD_PREP(FEATURE(ID_AA64DFR0_PMUVER), 4);
+		break;
 	}
 
 	return val;
-- 
2.20.1


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

WARNING: multiple messages have this Message-ID (diff)

From: Marc Zyngier <maz@kernel.org>
To: linux-arm-kernel@lists.infradead.org,
	kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org
Cc: Peter Maydell <peter.maydell@linaro.org>,
	James Morse <james.morse@arm.com>,
	Julien Thierry <julien.thierry.kdev@gmail.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>
Subject: [PATCH 3/5] kvm: arm64: Limit PMU version to ARMv8.1
Date: Sun, 16 Feb 2020 18:53:22 +0000	[thread overview]
Message-ID: <20200216185324.32596-4-maz@kernel.org> (raw)
In-Reply-To: <20200216185324.32596-1-maz@kernel.org>

Our PMU code is only implementing the ARMv8.1 features, so let's
stick to this when reporting the feature set to the guest.

Signed-off-by: Marc Zyngier <maz@kernel.org>
---
 arch/arm64/kvm/sys_regs.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index 682fedd7700f..06b2d0dc6c73 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -1093,6 +1093,11 @@ static u64 read_id_reg(const struct kvm_vcpu *vcpu,
 				 FEATURE(ID_AA64ISAR1_GPA) |
 				 FEATURE(ID_AA64ISAR1_GPI));
 		break;
+	case SYS_ID_AA64DFR0_EL1:
+		/* Limit PMU to ARMv8.1 */
+		val &= ~FEATURE(ID_AA64DFR0_PMUVER);
+		val |= FIELD_PREP(FEATURE(ID_AA64DFR0_PMUVER), 4);
+		break;
 	}
 
 	return val;
-- 
2.20.1

next prev parent reply	other threads:[~2020-02-16 18:53 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-16 18:53 [PATCH 0/5] Random debug/PMU fixes for 5.6 Marc Zyngier
2020-02-16 18:53 ` Marc Zyngier
2020-02-16 18:53 ` Marc Zyngier
2020-02-16 18:53 ` [PATCH 1/5] KVM: arm64: Fix missing RES1 in emulation of DBGBIDR Marc Zyngier
2020-02-16 18:53   ` Marc Zyngier
2020-02-16 18:53   ` Marc Zyngier
2020-02-18 17:43   ` James Morse
2020-02-18 17:43     ` James Morse
2020-02-18 17:43     ` James Morse
2020-02-18 18:01     ` Robin Murphy
2020-02-18 18:01       ` Robin Murphy
2020-02-18 18:01       ` Robin Murphy
2020-02-18 18:15       ` James Morse
2020-02-18 18:15         ` James Morse
2020-02-18 18:15         ` James Morse
2020-02-16 18:53 ` [PATCH 2/5] KVM: arm64: Refactor filtering of ID registers Marc Zyngier
2020-02-16 18:53   ` Marc Zyngier
2020-02-16 18:53   ` Marc Zyngier
2020-02-20 14:12   ` Andre Przywara
2020-02-20 14:12     ` Andre Przywara
2020-02-20 14:12     ` Andre Przywara
2020-02-16 18:53 ` Marc Zyngier [this message]
2020-02-16 18:53   ` [PATCH 3/5] kvm: arm64: Limit PMU version to ARMv8.1 Marc Zyngier
2020-02-16 18:53   ` Marc Zyngier
2020-02-18 17:43   ` James Morse
2020-02-18 17:43     ` James Morse
2020-02-18 17:43     ` James Morse
2020-02-19  9:46     ` Marc Zyngier
2020-02-19  9:46       ` Marc Zyngier
2020-02-19  9:46       ` Marc Zyngier
2020-02-19 10:18       ` James Morse
2020-02-19 10:18         ` James Morse
2020-02-19 10:18         ` James Morse
2020-02-19 11:14         ` Marc Zyngier
2020-02-19 11:14           ` Marc Zyngier
2020-02-19 11:14           ` Marc Zyngier
2020-02-16 18:53 ` [PATCH 4/5] KVM: arm64: Limit the debug architecture to ARMv8.0 Marc Zyngier
2020-02-16 18:53   ` Marc Zyngier
2020-02-16 18:53   ` Marc Zyngier
2020-02-18 17:45   ` James Morse
2020-02-18 17:45     ` James Morse
2020-02-18 17:45     ` James Morse
2020-02-16 18:53 ` [PATCH 5/5] KVM: arm64: Upgrade PMU support to ARMv8.4 Marc Zyngier
2020-02-16 18:53   ` Marc Zyngier
2020-02-16 18:53   ` Marc Zyngier

find likely ancestor, descendant, or conflicting patches for this message:
( dfblob:682fedd7700 dfblob:06b2d0dc6c7 dfblob:682fedd7700
dfblob:06b2d0dc6c7 dfblob:682fedd7700 dfblob:06b2d0dc6c7 )
 OR (
bs:"[PATCH 3/5] kvm: arm64: Limit PMU version to ARMv8.1" )
	(help)

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