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 <oliver.upton@linux.dev>,
Zenghui Yu <yuzenghui@huawei.com>,
Eric Auger <eric.auger@redhat.com>,
gankulkarni@os.amperecomputing.com
Subject: [PATCH v2 11/14] KVM: arm64: Make ID_AA64MMFR4_EL1.NV_frac writable
Date: Thu, 20 Feb 2025 13:49:04 +0000 [thread overview]
Message-ID: <20250220134907.554085-12-maz@kernel.org> (raw)
In-Reply-To: <20250220134907.554085-1-maz@kernel.org>
We want to make sure that it is possible for userspace to configure
whether recursive NV is possible. Make NV_frac writable for that
purpose.
Signed-off-by: Marc Zyngier <maz@kernel.org>
---
arch/arm64/kvm/sys_regs.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index 87f165289fb9f..5de542b045ac8 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -2666,7 +2666,7 @@ static const struct sys_reg_desc sys_reg_descs[] = {
ID_WRITABLE(ID_AA64MMFR3_EL1, (ID_AA64MMFR3_EL1_TCRX |
ID_AA64MMFR3_EL1_S1PIE |
ID_AA64MMFR3_EL1_S1POE)),
- ID_SANITISED(ID_AA64MMFR4_EL1),
+ ID_WRITABLE(ID_AA64MMFR4_EL1, ID_AA64MMFR4_EL1_NV_frac),
ID_UNALLOCATED(7,5),
ID_UNALLOCATED(7,6),
ID_UNALLOCATED(7,7),
--
2.39.2
next prev parent reply other threads:[~2025-02-20 13:57 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-20 13:48 [PATCH v2 00/14] KVM: arm64: NV userspace ABI Marc Zyngier
2025-02-20 13:48 ` [PATCH v2 01/14] arm64: cpufeature: Handle NV_frac as a synonym of NV2 Marc Zyngier
2025-02-20 14:03 ` Joey Gouly
2025-02-20 13:48 ` [PATCH v2 02/14] KVM: arm64: Hide ID_AA64MMFR2_EL1.NV from guest and userspace Marc Zyngier
2025-02-20 17:36 ` Sebastian Ott
2025-02-20 19:46 ` Marc Zyngier
2025-02-21 7:52 ` Sebastian Ott
2025-02-20 13:48 ` [PATCH v2 05/14] KVM: arm64: Advertise NV2 in the boot messages Marc Zyngier
2025-02-20 13:48 ` [PATCH v2 06/14] KVM: arm64: Consolidate idreg callbacks Marc Zyngier
2025-02-20 15:43 ` Ganapatrao Kulkarni
2025-02-20 13:49 ` [PATCH v2 08/14] KVM: arm64: Enforce NV limits on a per-idregs basis Marc Zyngier
2025-02-20 13:49 ` Marc Zyngier [this message]
2025-02-20 13:49 ` [PATCH v2 14/14] KVM: arm64: Document NV caps and vcpu flags Marc Zyngier
2025-02-20 14:04 ` [PATCH v2 00/14] KVM: arm64: NV userspace ABI Joey Gouly
[not found] ` <20250220134907.554085-11-maz@kernel.org>
2025-02-24 9:44 ` [PATCH v2 10/14] KVM: arm64: Allow userspace to limit NV support to nVHE Aneesh Kumar K.V
2025-02-24 19:52 ` (subset) [PATCH v2 00/14] KVM: arm64: NV userspace ABI Oliver Upton
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