Re: [PATCH v16 5/6] KVM: arm64: Allow GCS to be enabled for guests

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.