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From: Mark Brown <broonie@kernel.org>
To: Catalin Marinas <catalin.marinas@arm.com>,
	 Will Deacon <will@kernel.org>, Marc Zyngier <maz@kernel.org>,
	 Joey Gouly <joey.gouly@arm.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	 Shuah Khan <shuah@kernel.org>, Fuad Tabba <tabba@google.com>,
	 Oliver Upton <oupton@kernel.org>
Cc: Peter Maydell <peter.maydell@linaro.org>,
	 linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org,
	 kvmarm@lists.linux.dev, linux-kselftest@vger.kernel.org,
	 linux-kernel@vger.kernel.org, Mark Brown <broonie@kernel.org>
Subject: [PATCH v17 02/14] KVM: arm64: Fix FGT mapping for HFGITR_EL2.nGCSEPP
Date: Fri, 31 Jul 2026 13:25:40 +0100	[thread overview]
Message-ID: <20260731-arm64-gcs-v17-2-5e39ca01b14e@kernel.org> (raw)
In-Reply-To: <20260731-arm64-gcs-v17-0-5e39ca01b14e@kernel.org>

The encoding to trap mapping currently maps a FGT on OP_GCSPOPX to
HFGITR_EL2.nGCSEPP but as per DDI0601 2026-06 this FGT controls trapping
of GCSPUSHX and GCSPOPCX, and not the separate GCSPOPX instruction.
Update the mapping to reflect the architecture.

Fixes: 863ac38984a82 ("KVM: arm64: Add missing HFGITR_EL2 FGT entries to nested virt")
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 arch/arm64/kvm/emulate-nested.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/kvm/emulate-nested.c b/arch/arm64/kvm/emulate-nested.c
index 3c82f392845d..b32742d9dd73 100644
--- a/arch/arm64/kvm/emulate-nested.c
+++ b/arch/arm64/kvm/emulate-nested.c
@@ -1432,7 +1432,7 @@ static const struct encoding_to_trap_config encoding_to_fgt[] __initconst = {
 	SR_FGT(OP_AT_S1E1A, 		HFGITR, ATS1E1A, 1),
 	SR_FGT(OP_COSP_RCTX, 		HFGITR, COSPRCTX, 1),
 	SR_FGT(OP_GCSPUSHX, 		HFGITR, nGCSEPP, 0),
-	SR_FGT(OP_GCSPOPX, 		HFGITR, nGCSEPP, 0),
+	SR_FGT(OP_GCSPOPCX, 		HFGITR, nGCSEPP, 0),
 	SR_FGT(OP_GCSPUSHM, 		HFGITR, nGCSPUSHM_EL1, 0),
 	SR_FGT(OP_BRB_IALL, 		HFGITR, nBRBIALL, 0),
 	SR_FGT(OP_BRB_INJ, 		HFGITR, nBRBINJ, 0),

-- 
2.47.3


  parent reply	other threads:[~2026-07-31 12:37 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-07-31 12:25 [PATCH v17 00/14] KVM: arm64: Provide guest support for GCS Mark Brown
2026-07-31 12:25 ` [PATCH v17 01/14] arm64/gcs: Ensure FGTs for EL1 GCS instructions are disabled Mark Brown
2026-07-31 12:25 ` Mark Brown [this message]
2026-07-31 13:03   ` [PATCH v17 02/14] KVM: arm64: Fix FGT mapping for HFGITR_EL2.nGCSEPP sashiko-bot
2026-07-31 13:47     ` Mark Brown
2026-07-31 12:25 ` [PATCH v17 03/14] KVM: arm64: Manage GCS access and registers for guests Mark Brown
2026-07-31 12:56   ` sashiko-bot
2026-07-31 15:26     ` Mark Brown
2026-07-31 12:25 ` [PATCH v17 04/14] KVM: arm64: Ensure GCS memory effects are visible Mark Brown
2026-07-31 12:25 ` [PATCH v17 05/14] KVM: arm64: Set PSTATE.EXLOCK when entering an exception Mark Brown
2026-07-31 12:25 ` [PATCH v17 06/14] KVM: arm64: Validate GCS exception lock when emulating ERET Mark Brown
2026-07-31 12:25 ` [PATCH v17 07/14] KVM: arm64: Forward GCS exceptions to nested guests Mark Brown
2026-07-31 12:58   ` sashiko-bot
2026-07-31 12:25 ` [PATCH v17 08/14] KVM: arm64: Enforce EXLOCK for SPSR and ELR Mark Brown
2026-07-31 12:25 ` [PATCH v17 09/14] KVM: arm64: Allow GCS to be enabled for guests Mark Brown
2026-07-31 12:25 ` [PATCH v17 10/14] KVM: selftests: arm64: Add GCS registers to get-reg-list Mark Brown
2026-07-31 13:03   ` sashiko-bot
2026-07-31 13:31     ` Mark Brown
2026-07-31 12:25 ` [PATCH v17 11/14] KVM: selftests: arm64: Add GCS to set_id_regs Mark Brown
2026-07-31 12:25 ` [PATCH v17 12/14] KVM: selftests: arm64: Only restore SPSR_EL1 and ELR_EL1 if they change Mark Brown
2026-07-31 12:25 ` [PATCH v17 13/14] tools: Synchronise the kernel esr.h Mark Brown
2026-07-31 12:25 ` [PATCH v17 14/14] KVM: selftests: arm64: Add GCS EXLOCK exception emulation test Mark Brown

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