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From: Oliver Upton <oupton@google.com>
To: kvmarm@lists.cs.columbia.edu
Cc: kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, maz@kernel.org,
	james.morse@arm.com, alexandru.elisei@arm.com,
	suzuki.poulose@arm.com, tabba@google.com, qperret@google.com,
	will@kernel.org, Oliver Upton <oupton@google.com>
Subject: [PATCH 2/2] KVM: arm64: pkvm: Don't mask already zeroed FEAT_SVE
Date: Mon,  9 May 2022 16:25:59 +0000	[thread overview]
Message-ID: <20220509162559.2387784-3-oupton@google.com> (raw)
In-Reply-To: <20220509162559.2387784-1-oupton@google.com>

FEAT_SVE is already masked by the fixed configuration for
ID_AA64PFR0_EL1; don't try and mask it at runtime.

No functional change intended.

Signed-off-by: Oliver Upton <oupton@google.com>
---
 arch/arm64/kvm/hyp/nvhe/sys_regs.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/arch/arm64/kvm/hyp/nvhe/sys_regs.c b/arch/arm64/kvm/hyp/nvhe/sys_regs.c
index 33f5181af330..3f5d7bd171c5 100644
--- a/arch/arm64/kvm/hyp/nvhe/sys_regs.c
+++ b/arch/arm64/kvm/hyp/nvhe/sys_regs.c
@@ -90,9 +90,6 @@ static u64 get_pvm_id_aa64pfr0(const struct kvm_vcpu *vcpu)
 	u64 set_mask = 0;
 	u64 allow_mask = PVM_ID_AA64PFR0_ALLOW;
 
-	if (!vcpu_has_sve(vcpu))
-		allow_mask &= ~ARM64_FEATURE_MASK(ID_AA64PFR0_SVE);
-
 	set_mask |= get_restricted_features_unsigned(id_aa64pfr0_el1_sys_val,
 		PVM_ID_AA64PFR0_RESTRICT_UNSIGNED);
 
-- 
2.36.0.512.ge40c2bad7a-goog


WARNING: multiple messages have this Message-ID (diff)
From: Oliver Upton <oupton@google.com>
To: kvmarm@lists.cs.columbia.edu
Cc: kvm@vger.kernel.org, maz@kernel.org,
	linux-kernel@vger.kernel.org, will@kernel.org,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH 2/2] KVM: arm64: pkvm: Don't mask already zeroed FEAT_SVE
Date: Mon,  9 May 2022 16:25:59 +0000	[thread overview]
Message-ID: <20220509162559.2387784-3-oupton@google.com> (raw)
In-Reply-To: <20220509162559.2387784-1-oupton@google.com>

FEAT_SVE is already masked by the fixed configuration for
ID_AA64PFR0_EL1; don't try and mask it at runtime.

No functional change intended.

Signed-off-by: Oliver Upton <oupton@google.com>
---
 arch/arm64/kvm/hyp/nvhe/sys_regs.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/arch/arm64/kvm/hyp/nvhe/sys_regs.c b/arch/arm64/kvm/hyp/nvhe/sys_regs.c
index 33f5181af330..3f5d7bd171c5 100644
--- a/arch/arm64/kvm/hyp/nvhe/sys_regs.c
+++ b/arch/arm64/kvm/hyp/nvhe/sys_regs.c
@@ -90,9 +90,6 @@ static u64 get_pvm_id_aa64pfr0(const struct kvm_vcpu *vcpu)
 	u64 set_mask = 0;
 	u64 allow_mask = PVM_ID_AA64PFR0_ALLOW;
 
-	if (!vcpu_has_sve(vcpu))
-		allow_mask &= ~ARM64_FEATURE_MASK(ID_AA64PFR0_SVE);
-
 	set_mask |= get_restricted_features_unsigned(id_aa64pfr0_el1_sys_val,
 		PVM_ID_AA64PFR0_RESTRICT_UNSIGNED);
 
-- 
2.36.0.512.ge40c2bad7a-goog

_______________________________________________
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: Oliver Upton <oupton@google.com>
To: kvmarm@lists.cs.columbia.edu
Cc: kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	 linux-kernel@vger.kernel.org, maz@kernel.org,
	james.morse@arm.com,  alexandru.elisei@arm.com,
	suzuki.poulose@arm.com, tabba@google.com,  qperret@google.com,
	will@kernel.org, Oliver Upton <oupton@google.com>
Subject: [PATCH 2/2] KVM: arm64: pkvm: Don't mask already zeroed FEAT_SVE
Date: Mon,  9 May 2022 16:25:59 +0000	[thread overview]
Message-ID: <20220509162559.2387784-3-oupton@google.com> (raw)
In-Reply-To: <20220509162559.2387784-1-oupton@google.com>

FEAT_SVE is already masked by the fixed configuration for
ID_AA64PFR0_EL1; don't try and mask it at runtime.

No functional change intended.

Signed-off-by: Oliver Upton <oupton@google.com>
---
 arch/arm64/kvm/hyp/nvhe/sys_regs.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/arch/arm64/kvm/hyp/nvhe/sys_regs.c b/arch/arm64/kvm/hyp/nvhe/sys_regs.c
index 33f5181af330..3f5d7bd171c5 100644
--- a/arch/arm64/kvm/hyp/nvhe/sys_regs.c
+++ b/arch/arm64/kvm/hyp/nvhe/sys_regs.c
@@ -90,9 +90,6 @@ static u64 get_pvm_id_aa64pfr0(const struct kvm_vcpu *vcpu)
 	u64 set_mask = 0;
 	u64 allow_mask = PVM_ID_AA64PFR0_ALLOW;
 
-	if (!vcpu_has_sve(vcpu))
-		allow_mask &= ~ARM64_FEATURE_MASK(ID_AA64PFR0_SVE);
-
 	set_mask |= get_restricted_features_unsigned(id_aa64pfr0_el1_sys_val,
 		PVM_ID_AA64PFR0_RESTRICT_UNSIGNED);
 
-- 
2.36.0.512.ge40c2bad7a-goog


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

  parent reply	other threads:[~2022-05-09 16:26 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-05-09 16:25 [PATCH 0/2] KVM: arm64: Minor pKVM cleanups Oliver Upton
2022-05-09 16:25 ` Oliver Upton
2022-05-09 16:25 ` Oliver Upton
2022-05-09 16:25 ` [PATCH 1/2] KVM: arm64: pkvm: Drop unnecessary FP/SIMD trap handler Oliver Upton
2022-05-09 16:25   ` Oliver Upton
2022-05-09 16:25   ` Oliver Upton
2022-05-10  9:44   ` Fuad Tabba
2022-05-10  9:44     ` Fuad Tabba
2022-05-10  9:44     ` Fuad Tabba
2022-05-09 16:25 ` Oliver Upton [this message]
2022-05-09 16:25   ` [PATCH 2/2] KVM: arm64: pkvm: Don't mask already zeroed FEAT_SVE Oliver Upton
2022-05-09 16:25   ` Oliver Upton
2022-05-10  9:45   ` Fuad Tabba
2022-05-10  9:45     ` Fuad Tabba
2022-05-10  9:45     ` Fuad Tabba
2022-05-10 10:04 ` [PATCH 0/2] KVM: arm64: Minor pKVM cleanups Marc Zyngier
2022-05-10 10:04   ` Marc Zyngier
2022-05-10 10:04   ` Marc Zyngier

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