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From: Marc Zyngier <maz@kernel.org>
To: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org,
	kvm@vger.kernel.org
Cc: James Morse <james.morse@arm.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Oliver Upton <oliver.upton@linux.dev>,
	Zenghui Yu <yuzenghui@huawei.com>
Subject: [PATCH 10/11] arm64: Expose ID_AA64ISAR1_EL1.LS64 to sanitised feature consumers
Date: Thu, 15 Aug 2024 13:59:58 +0100	[thread overview]
Message-ID: <20240815125959.2097734-11-maz@kernel.org> (raw)
In-Reply-To: <20240815125959.2097734-1-maz@kernel.org>

Despite KVM now being able to deal with FEAT_LS64, we still don't
expose these feature bits to KVM.

Plumb in the feature in ID_AA64ISAR1_EL1.

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

diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index 4901daace5a3..1489179f1b25 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -228,6 +228,7 @@ static const struct arm64_ftr_bits ftr_id_aa64isar0[] = {
 };
 
 static const struct arm64_ftr_bits ftr_id_aa64isar1[] = {
+	ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ISAR1_EL1_LS64_SHIFT, 4, 0),
 	ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ISAR1_EL1_XS_SHIFT, 4, 0),
 	ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ISAR1_EL1_I8MM_SHIFT, 4, 0),
 	ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ISAR1_EL1_DGH_SHIFT, 4, 0),
-- 
2.39.2


  parent reply	other threads:[~2024-08-15 13:00 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-08-15 12:59 [PATCH 00/11] KVM: arm64: Add support for FEAT_LS64 and co Marc Zyngier
2024-08-15 12:59 ` [PATCH 01/11] arm64: Expose ID_AA64ISAR1_EL1.XS to sanitised feature consumers Marc Zyngier
2024-08-15 12:59 ` [PATCH 02/11] arm64: Add syndrome information for trapped LD64B/ST64B{,V,V0} Marc Zyngier
2024-08-15 12:59 ` [PATCH 03/11] KVM: arm64: Add ACCDATA_EL1 to the sysreg array Marc Zyngier
2024-08-15 12:59 ` [PATCH 04/11] KVM: arm64: Add context-switch of ACCDATA_EL1 Marc Zyngier
2024-08-15 12:59 ` [PATCH 05/11] KVM: arm64: Handle trapping of FEAT_LS64* instructions Marc Zyngier
2024-08-15 12:59 ` [PATCH 06/11] KVM: arm64: Add exit to userspace on {LD,ST}64B* outside of memslots Marc Zyngier
2024-08-15 12:59 ` [PATCH 07/11] KVM: arm64: Restrict ACCDATA_EL1 undef to FEAT_ST64_ACCDATA being disabled Marc Zyngier
2024-08-15 12:59 ` [PATCH 08/11] KVM: arm64: Conditionnaly enable FEAT_LS64* instructions Marc Zyngier
2024-08-15 12:59 ` [PATCH 09/11] KVM: arm64: nv: Expose FEAT_LS64* to a nested guest Marc Zyngier
2024-08-15 12:59 ` Marc Zyngier [this message]
2024-08-15 12:59 ` [PATCH 11/11] KVM: arm64: Add documentation for KVM_EXIT_ARM_LDST64B Marc Zyngier

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