[PATCH v4 14/15] KVM: arm64: nv: Advertise support for PAuth

From: Marc Zyngier <maz@kernel.org>
To: kvmarm@lists.linux.dev, kvm@vger.kernel.org,
	linux-arm-kernel@lists.infradead.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>,
	Joey Gouly <joey.gouly@arm.com>, Fuad Tabba <tabba@google.com>,
	Mostafa Saleh <smostafa@google.com>,
	Will Deacon <will@kernel.org>,
	Catalin Marinas <catalin.marinas@arm.com>
Subject: [PATCH v4 14/15] KVM: arm64: nv: Advertise support for PAuth
Date: Fri, 19 Apr 2024 11:29:34 +0100	[thread overview]
Message-ID: <20240419102935.1935571-15-maz@kernel.org> (raw)
In-Reply-To: <20240419102935.1935571-1-maz@kernel.org>

Now that we (hopefully) correctly handle ERETAx, drop the masking
of the PAuth feature (something that was not even complete, as
APA3 and AGA3 were still exposed).

Reviewed-by: Joey Gouly <joey.gouly@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
---
 arch/arm64/kvm/nested.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/arch/arm64/kvm/nested.c b/arch/arm64/kvm/nested.c
index ced30c90521a..6813c7c7f00a 100644
--- a/arch/arm64/kvm/nested.c
+++ b/arch/arm64/kvm/nested.c
@@ -35,13 +35,9 @@ static u64 limit_nv_id_reg(u32 id, u64 val)
 		break;
 
 	case SYS_ID_AA64ISAR1_EL1:
-		/* Support everything but PtrAuth and Spec Invalidation */
+		/* Support everything but Spec Invalidation */
 		val &= ~(GENMASK_ULL(63, 56)	|
-			 NV_FTR(ISAR1, SPECRES)	|
-			 NV_FTR(ISAR1, GPI)	|
-			 NV_FTR(ISAR1, GPA)	|
-			 NV_FTR(ISAR1, API)	|
-			 NV_FTR(ISAR1, APA));
+			 NV_FTR(ISAR1, SPECRES));
 		break;
 
 	case SYS_ID_AA64PFR0_EL1:
-- 
2.39.2

