From: Marc Zyngier <maz@kernel.org>
To: Mark Brown <broonie@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Oliver Upton <oliver.upton@linux.dev>,
Joey Gouly <joey.gouly@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Shuah Khan <shuah@kernel.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
Subject: Re: [PATCH v16 5/6] KVM: arm64: Allow GCS to be enabled for guests
Date: Fri, 12 Sep 2025 22:44:27 +0100 [thread overview]
Message-ID: <87cy7vz6pw.wl-maz@kernel.org> (raw)
In-Reply-To: <20250912-arm64-gcs-v16-5-6435e5ec37db@kernel.org>
On Fri, 12 Sep 2025 10:25:31 +0100,
Mark Brown <broonie@kernel.org> wrote:
>
> Now that required functionality for GCS is in place expose
> ID_AA64PFR1_EL1.GCS, allowing guests to be given the feature.
>
> Signed-off-by: Mark Brown <broonie@kernel.org>
> ---
> arch/arm64/kvm/nested.c | 7 ++++---
> arch/arm64/kvm/sys_regs.c | 2 --
> 2 files changed, 4 insertions(+), 5 deletions(-)
>
> diff --git a/arch/arm64/kvm/nested.c b/arch/arm64/kvm/nested.c
> index 153b3e11b115..d2d55e18c610 100644
> --- a/arch/arm64/kvm/nested.c
> +++ b/arch/arm64/kvm/nested.c
> @@ -1459,9 +1459,10 @@ u64 limit_nv_id_reg(struct kvm *kvm, u32 reg, u64 val)
>
> case SYS_ID_AA64PFR1_EL1:
> /* Only support BTI, SSBS, CSV2_frac */
> - val &= (ID_AA64PFR1_EL1_BT |
> - ID_AA64PFR1_EL1_SSBS |
> - ID_AA64PFR1_EL1_CSV2_frac);
> + val &= (ID_AA64PFR1_EL1_BT |
> + ID_AA64PFR1_EL1_SSBS |
> + ID_AA64PFR1_EL1_CSV2_frac |
> + ID_AA64PFR1_EL1_GCS);
How about updating the comment?
M.
--
Jazz isn't dead. It just smells funny.
next prev parent reply other threads:[~2025-09-12 21:44 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-12 9:25 [PATCH v16 0/6] KVM: arm64: Provide guest support for GCS Mark Brown
2025-09-12 9:25 ` [PATCH v16 1/6] arm64/gcs: Ensure FGTs for EL1 GCS instructions are disabled Mark Brown
2025-09-12 9:25 ` [PATCH v16 2/6] KVM: arm64: Manage GCS access and registers for guests Mark Brown
2025-09-12 11:59 ` Marc Zyngier
2025-09-12 16:33 ` Mark Brown
2025-09-12 17:14 ` Mark Brown
2025-09-12 21:30 ` Marc Zyngier
2025-09-12 9:25 ` [PATCH v16 3/6] KVM: arm64: Set PSTATE.EXLOCK when entering an exception Mark Brown
2025-09-12 9:25 ` [PATCH v16 4/6] KVM: arm64: Validate GCS exception lock when emulating ERET Mark Brown
2025-09-12 12:06 ` Marc Zyngier
2025-09-12 9:25 ` [PATCH v16 5/6] KVM: arm64: Allow GCS to be enabled for guests Mark Brown
2025-09-12 21:44 ` Marc Zyngier [this message]
2025-09-12 9:25 ` [PATCH v16 6/6] KVM: selftests: arm64: Add GCS registers to get-reg-list Mark Brown
2025-09-12 21:46 ` Marc Zyngier
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