From: Marc Zyngier <maz@kernel.org>
To: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org,
kvm@vger.kernel.org
Cc: Steffen Eiden <seiden@linux.ibm.com>,
Joey Gouly <joey.gouly@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Oliver Upton <oupton@kernel.org>,
Zenghui Yu <yuzenghui@huawei.com>
Subject: [PATCH v2 26/28] KVM: arm64: Add FEAT_NV3 detection
Date: Tue, 14 Jul 2026 10:16:39 +0100 [thread overview]
Message-ID: <20260714091641.1970822-27-maz@kernel.org> (raw)
In-Reply-To: <20260714091641.1970822-1-maz@kernel.org>
Now that everything is in place to engage the FEAT_NV3 fast-path,
add the detection code to cpufeature.c.
Signed-off-by: Marc Zyngier <maz@kernel.org>
---
arch/arm64/kernel/cpufeature.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index c9c124b0ccc8e..6ae1c816e2010 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -2627,6 +2627,13 @@ static const struct arm64_cpu_capabilities arm64_features[] = {
.matches = has_cpuid_feature,
ARM64_CPUID_FIELDS(ID_AA64MMFR4_EL1, NV_frac, NV2P1)
},
+ {
+ .desc = "FEAT_NV3",
+ .capability = ARM64_HAS_NV3,
+ .type = ARM64_CPUCAP_SYSTEM_FEATURE,
+ .matches = has_cpuid_feature,
+ ARM64_CPUID_FIELDS(ID_AA64MMFR4_EL1, NV_frac, NV3)
+ },
{
.capability = ARM64_HAS_32BIT_EL0_DO_NOT_USE,
.type = ARM64_CPUCAP_SYSTEM_FEATURE,
--
2.47.3
next prev parent reply other threads:[~2026-07-14 9:17 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-14 9:16 [PATCH v2 00/28] KVM: arm64: Add support for FEAT_NV2p1 and FEAT_NV3 Marc Zyngier
2026-07-14 9:16 ` [PATCH v2 01/28] arm64: sysreg: Emit RESx/UNKN values for Mapping/Fields definitions Marc Zyngier
2026-07-14 9:16 ` [PATCH v2 02/28] arm64: Update ID_AA64MMFR4_EL1 description to 2026-03 JSON release Marc Zyngier
2026-07-14 9:16 ` [PATCH v2 03/28] KVM: arm64: Merge guest's HCRX_EL2 using NV_HCRX_GUEST_EXCLUDE Marc Zyngier
2026-07-14 9:16 ` [PATCH v2 04/28] KVM: arm64: Drop __HCRX_EL2_* masks Marc Zyngier
2026-07-14 9:16 ` [PATCH v2 05/28] KVM: arm64: Plumb HCRX_EL2.SRMASKEn in HCRX_EL2 sanitisation Marc Zyngier
2026-07-14 9:16 ` [PATCH v2 06/28] KVM: arm64: Classify CPTR_EL2 as a SR_LOC_SPECIAL register Marc Zyngier
2026-07-14 9:16 ` [PATCH v2 07/28] KVM: arm64: Don't evaluate HCR_EL2.NV nor HFGITR_EL2.ERET on ERET fast path Marc Zyngier
2026-07-14 9:16 ` [PATCH v2 08/28] arm64: Add ARM64_HAS_NV2P1 capability Marc Zyngier
2026-07-14 9:16 ` [PATCH v2 09/28] KVM: arm64: Relax CPTR_EL2 handling when FEAT_NV2p1 is present Marc Zyngier
2026-07-14 9:16 ` [PATCH v2 10/28] KVM: arm64: Relax CNTHCTL_EL2 " Marc Zyngier
2026-07-14 9:16 ` [PATCH v2 11/28] KVM: arm64: Expose FEAT_NV2p1 to NV guests Marc Zyngier
2026-07-14 9:16 ` [PATCH v2 12/28] arm64: Add FEAT_NV2p1 detection Marc Zyngier
2026-07-14 9:16 ` [PATCH v2 13/28] arm64: sysreg: Add NVHCR_EL2 description as a mirror of HCR_EL2 Marc Zyngier
2026-07-14 9:16 ` [PATCH v2 14/28] arm64: sysreg: Add HCRX_EL2 bits related to FEAT_NV3 Marc Zyngier
2026-07-14 9:16 ` [PATCH v2 15/28] arm64: Add ARM64_HAS_NV3 capability Marc Zyngier
2026-07-14 9:16 ` [PATCH v2 16/28] KVM: arm64: Split NV-specific exit fixups from the non-NV handling Marc Zyngier
2026-07-14 9:16 ` [PATCH v2 17/28] KVM: arm64: Add NV3 control bits to HCRX_EL2 sanitisation Marc Zyngier
2026-07-14 9:16 ` [PATCH v2 18/28] KVM: arm64: Add kvm_has_nv{2,3}() predicates Marc Zyngier
2026-07-14 9:16 ` [PATCH v2 19/28] KVM: arm64: Make HCR_EL2 a non-VNCR register Marc Zyngier
2026-07-14 9:16 ` [PATCH v2 20/28] KVM: arm64: Add sanitisation for NVHCR_EL2 Marc Zyngier
2026-07-14 9:16 ` [PATCH v2 21/28] KVM: arm64: Add NVHCR_EL2 handling to the sysreg array Marc Zyngier
2026-07-14 9:16 ` [PATCH v2 22/28] KVM: arm64: Add routing for NVHCR_EL2 trap Marc Zyngier
2026-07-14 9:16 ` [PATCH v2 23/28] KVM: arm64: Add NVHCR_EL2 context switching Marc Zyngier
2026-07-14 9:16 ` [PATCH v2 24/28] KVM: arm64: Engage NV3 ERET trap elision Marc Zyngier
2026-07-14 9:16 ` [PATCH v2 25/28] KVM: arm64: Engage NV3 TLBI " Marc Zyngier
2026-07-14 9:16 ` Marc Zyngier [this message]
2026-07-14 9:16 ` [PATCH v2 27/28] KVM: arm64: Expose FEAT_NV3 to guests Marc Zyngier
2026-07-14 9:16 ` [PATCH v2 28/28] arm64: Add override for ID_AA64MMFR4_EL1.NV_frac Marc Zyngier
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