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From: Oliver Upton <oliver.upton@linux.dev>
To: kvmarm@lists.linux.dev
Cc: Marc Zyngier <maz@kernel.org>, James Morse <james.morse@arm.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Zenghui Yu <yuzenghui@huawei.com>,
	kvm@vger.kernel.org, Oliver Upton <oliver.upton@linux.dev>
Subject: [PATCH 11/11] KVM: arm64: Allow the use of SVE+NV
Date: Fri, 31 May 2024 23:13:58 +0000	[thread overview]
Message-ID: <20240531231358.1000039-12-oliver.upton@linux.dev> (raw)
In-Reply-To: <20240531231358.1000039-1-oliver.upton@linux.dev>

Allow SVE and NV to mix now that everything is in place to handle it
correctly.

Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
---
 arch/arm64/kvm/arm.c    | 5 -----
 arch/arm64/kvm/nested.c | 3 +--
 2 files changed, 1 insertion(+), 7 deletions(-)

diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index 9996a989b52e..e2c934728f73 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -1419,11 +1419,6 @@ static int kvm_vcpu_init_check_features(struct kvm_vcpu *vcpu,
 	    test_bit(KVM_ARM_VCPU_PTRAUTH_GENERIC, &features))
 		return -EINVAL;
 
-	/* Disallow NV+SVE for the time being */
-	if (test_bit(KVM_ARM_VCPU_HAS_EL2, &features) &&
-	    test_bit(KVM_ARM_VCPU_SVE, &features))
-		return -EINVAL;
-
 	if (!test_bit(KVM_ARM_VCPU_EL1_32BIT, &features))
 		return 0;
 
diff --git a/arch/arm64/kvm/nested.c b/arch/arm64/kvm/nested.c
index 6813c7c7f00a..0aefc3e1b9a7 100644
--- a/arch/arm64/kvm/nested.c
+++ b/arch/arm64/kvm/nested.c
@@ -41,13 +41,12 @@ static u64 limit_nv_id_reg(u32 id, u64 val)
 		break;
 
 	case SYS_ID_AA64PFR0_EL1:
-		/* No AMU, MPAM, S-EL2, RAS or SVE */
+		/* No AMU, MPAM, S-EL2, or RAS */
 		val &= ~(GENMASK_ULL(55, 52)	|
 			 NV_FTR(PFR0, AMU)	|
 			 NV_FTR(PFR0, MPAM)	|
 			 NV_FTR(PFR0, SEL2)	|
 			 NV_FTR(PFR0, RAS)	|
-			 NV_FTR(PFR0, SVE)	|
 			 NV_FTR(PFR0, EL3)	|
 			 NV_FTR(PFR0, EL2)	|
 			 NV_FTR(PFR0, EL1));
-- 
2.45.1.288.g0e0cd299f1-goog


  parent reply	other threads:[~2024-05-31 23:14 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-05-31 23:13 [PATCH 00/11] KVM: arm64: nv: FPSIMD/SVE support Oliver Upton
2024-05-31 23:13 ` [PATCH 01/11] KVM: arm64: nv: Forward FP/ASIMD traps to guest hypervisor Oliver Upton
2024-05-31 23:13 ` [PATCH 02/11] KVM: arm64: nv: Forward SVE " Oliver Upton
2024-05-31 23:13 ` [PATCH 03/11] KVM: arm64: nv: Load guest FP state for ZCR_EL2 trap Oliver Upton
2024-06-01  9:47   ` Marc Zyngier
2024-06-01 16:47     ` Oliver Upton
2024-05-31 23:13 ` [PATCH 04/11] KVM: arm64: nv: Load guest hyp's ZCR into EL1 state Oliver Upton
2024-05-31 23:13 ` [PATCH 05/11] KVM: arm64: nv: Handle ZCR_EL2 traps Oliver Upton
2024-05-31 23:13 ` [PATCH 06/11] KVM: arm64: nv: Save guest's ZCR_EL2 when in hyp context Oliver Upton
2024-05-31 23:13 ` [PATCH 07/11] KVM: arm64: nv: Use guest hypervisor's max VL when running nested guest Oliver Upton
2024-05-31 23:13 ` [PATCH 08/11] KVM: arm64: nv: Ensure correct VL is loaded before saving SVE state Oliver Upton
2024-05-31 23:13 ` [PATCH 09/11] KVM: arm64: Spin off helper for programming CPTR traps Oliver Upton
2024-05-31 23:13 ` [PATCH 10/11] KVM: arm64: nv: Honor guest hypervisor's FP/SVE traps in CPTR_EL2 Oliver Upton
2024-06-03 12:36   ` Marc Zyngier
2024-06-03 17:28     ` Oliver Upton
2024-06-04 11:14       ` Marc Zyngier
2024-06-04 17:44         ` Oliver Upton
2024-05-31 23:13 ` Oliver Upton [this message]
2024-06-01 10:24 ` [PATCH 00/11] KVM: arm64: nv: FPSIMD/SVE support Marc Zyngier
2024-06-01 16:57   ` Oliver Upton
2024-06-02 14:28     ` Marc Zyngier

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