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>
Subject: [PATCH 11/14] KVM: arm64: Make ID_AA64MMFR4_EL1.NV_frac writable
Date: Sat, 15 Feb 2025 17:38:13 +0000 [thread overview]
Message-ID: <20250215173816.3767330-12-maz@kernel.org> (raw)
In-Reply-To: <20250215173816.3767330-1-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 c1e050a58fb2e..db7c4e791b99c 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -2669,7 +2669,7 @@ 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:[~2025-02-15 17:50 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-15 17:38 [PATCH 00/14] KVM: arm64: NV userspace ABI Marc Zyngier
2025-02-15 17:38 ` [PATCH 01/14] arm64: cpufeature: Handle NV_frac as a synonym of NV2 Marc Zyngier
2025-02-24 7:41 ` Aneesh Kumar K.V
2025-02-24 8:26 ` Marc Zyngier
2025-02-15 17:38 ` [PATCH 02/14] KVM: arm64: Hide ID_AA64MMFR2_EL1.NV from guest and userspace Marc Zyngier
2025-02-15 17:38 ` [PATCH 03/14] KVM: arm64: Mark HCR.EL2.E2H RES0 when ID_AA64MMFR1_EL1.VH is zero Marc Zyngier
2025-02-24 7:39 ` Aneesh Kumar K.V
2025-02-24 8:32 ` Marc Zyngier
2025-02-15 17:38 ` [PATCH 04/14] KVM: arm64: Mark HCR.EL2.{NV*,AT} RES0 when ID_AA64MMFR4_EL1.NV_frac is 0 Marc Zyngier
2025-02-15 17:38 ` [PATCH 05/14] KVM: arm64: Advertise NV2 in the boot messages Marc Zyngier
2025-02-15 17:38 ` [PATCH 06/14] KVM: arm64: Consolidate idreg reset method Marc Zyngier
2025-02-15 17:38 ` [PATCH 07/14] KVM: arm64: Make ID_REG_LIMIT_FIELD_ENUM() more widely available Marc Zyngier
2025-02-15 17:38 ` [PATCH 08/14] KVM: arm64: Enforce NV limits on a per-idregs basis Marc Zyngier
2025-02-15 17:38 ` [PATCH 09/14] KVM: arm64: Move NV-specific capping to idreg sanitisation Marc Zyngier
2025-02-15 17:38 ` [PATCH 10/14] KVM: arm64: Allow userspace to limit NV support to nVHE Marc Zyngier
2025-02-15 17:38 ` Marc Zyngier [this message]
2025-02-15 17:38 ` [PATCH 12/14] KVM: arm64: Advertise FEAT_ECV when possible Marc Zyngier
2025-02-15 17:38 ` [PATCH 13/14] KVM: arm64: Allow userspace to request KVM_ARM_VCPU_EL2* Marc Zyngier
2025-02-19 23:19 ` Oliver Upton
2025-02-15 17:38 ` [PATCH 14/14] KVM: arm64: Document NV caps and vcpu flags Marc Zyngier
2025-02-19 23:19 ` Oliver Upton
2025-02-19 23:17 ` [PATCH 00/14] KVM: arm64: NV userspace ABI Oliver Upton
2025-02-20 13:07 ` Marc Zyngier
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20250215173816.3767330-12-maz@kernel.org \
--to=maz@kernel.org \
--cc=eric.auger@redhat.com \
--cc=joey.gouly@arm.com \
--cc=kvm@vger.kernel.org \
--cc=kvmarm@lists.linux.dev \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=oliver.upton@linux.dev \
--cc=suzuki.poulose@arm.com \
--cc=yuzenghui@huawei.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).