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From: Marc Zyngier <maz@kernel.org>
To: kvmarm@lists.linux.dev, kvm@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org
Cc: Joey Gouly <joey.gouly@arm.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Oliver Upton <oupton@kernel.org>,
	Zenghui Yu <yuzenghui@huawei.com>,
	Ben Horgan <ben.horgan@arm.com>,
	Yao Yuan <yaoyuan@linux.alibaba.com>
Subject: [PATCH v3 1/9] arm64: Repaint ID_AA64MMFR2_EL1.IDS description
Date: Thu,  4 Dec 2025 09:47:58 +0000	[thread overview]
Message-ID: <20251204094806.3846619-2-maz@kernel.org> (raw)
In-Reply-To: <20251204094806.3846619-1-maz@kernel.org>

ID_AA64MMFR2_EL1.IDS, as described in the sysreg file, is pretty horrible
as it diesctly give the ESR value. Repaint it using the usual NI/IMP
identifiers to describe the absence/presence of FEAT_IDST.

Signed-off-by: Marc Zyngier <maz@kernel.org>
---
 arch/arm64/kvm/hyp/nvhe/sys_regs.c | 2 +-
 arch/arm64/tools/sysreg            | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/arm64/kvm/hyp/nvhe/sys_regs.c b/arch/arm64/kvm/hyp/nvhe/sys_regs.c
index 82da9b03692d4..107d62921b168 100644
--- a/arch/arm64/kvm/hyp/nvhe/sys_regs.c
+++ b/arch/arm64/kvm/hyp/nvhe/sys_regs.c
@@ -134,7 +134,7 @@ static const struct pvm_ftr_bits pvmid_aa64mmfr2[] = {
 	MAX_FEAT(ID_AA64MMFR2_EL1, UAO, IMP),
 	MAX_FEAT(ID_AA64MMFR2_EL1, IESB, IMP),
 	MAX_FEAT(ID_AA64MMFR2_EL1, AT, IMP),
-	MAX_FEAT_ENUM(ID_AA64MMFR2_EL1, IDS, 0x18),
+	MAX_FEAT_ENUM(ID_AA64MMFR2_EL1, IDS, IMP),
 	MAX_FEAT(ID_AA64MMFR2_EL1, TTL, IMP),
 	MAX_FEAT(ID_AA64MMFR2_EL1, BBM, 2),
 	MAX_FEAT(ID_AA64MMFR2_EL1, E0PD, IMP),
diff --git a/arch/arm64/tools/sysreg b/arch/arm64/tools/sysreg
index 1c6cdf9d54bba..3261e8791ac03 100644
--- a/arch/arm64/tools/sysreg
+++ b/arch/arm64/tools/sysreg
@@ -2257,8 +2257,8 @@ UnsignedEnum	43:40	FWB
 	0b0001	IMP
 EndEnum
 Enum	39:36	IDS
-	0b0000	0x0
-	0b0001	0x18
+	0b0000	NI
+	0b0001	IMP
 EndEnum
 UnsignedEnum	35:32	AT
 	0b0000	NI
-- 
2.47.3


  reply	other threads:[~2025-12-04  9:48 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-12-04  9:47 [PATCH v3 0/9] KVM: arm64: Add support for FEAT_IDST Marc Zyngier
2025-12-04  9:47 ` Marc Zyngier [this message]
2025-12-04 10:32   ` [PATCH v3 1/9] arm64: Repaint ID_AA64MMFR2_EL1.IDS description Joey Gouly
2025-12-04 10:36   ` Ben Horgan
2025-12-04 10:48     ` Marc Zyngier
2025-12-04 11:13       ` Ben Horgan
2025-12-04 12:02         ` Marc Zyngier
2025-12-04  9:47 ` [PATCH v3 2/9] KVM: arm64: Add trap routing for GMID_EL1 Marc Zyngier
2025-12-04  9:48 ` [PATCH v3 3/9] KVM: arm64: Add a generic synchronous exception injection primitive Marc Zyngier
2025-12-04  9:48 ` [PATCH v3 4/9] KVM: arm64: Handle FEAT_IDST for sysregs without specific handlers Marc Zyngier
2025-12-04 10:52   ` Joey Gouly
2025-12-05  6:10   ` Yao Yuan
2025-12-04  9:48 ` [PATCH v3 5/9] KVM: arm64: Handle CSSIDR2_EL1 and SMIDR_EL1 in a generic way Marc Zyngier
2025-12-05  6:25   ` Yao Yuan
2025-12-04  9:48 ` [PATCH v3 6/9] KVM: arm64: Force trap of GMID_EL1 when the guest doesn't have MTE Marc Zyngier
2025-12-05  6:02   ` Yao Yuan
2025-12-04  9:48 ` [PATCH v3 7/9] KVM: arm64: pkvm: Add a generic synchronous exception injection primitive Marc Zyngier
2025-12-04  9:48 ` [PATCH v3 8/9] KVM: arm64: pkvm: Report optional ID register traps with a 0x18 syndrome Marc Zyngier
2025-12-04 10:51   ` Ben Horgan
2025-12-04 12:06     ` Marc Zyngier
2025-12-04  9:48 ` [PATCH v3 9/9] KVM: arm64: selftests: Add a test for FEAT_IDST Marc Zyngier

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