github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-31 18:43:33 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

KVM: arm64: Account for RESx bits in __compute_fgt()

Browse Source 
When computing Fine Grained Traps, it is preferable to account for
the reserved bits. The HW will most probably ignore them, unless the
bits have been repurposed to do something else.

Use caution, and fold our view of the reserved bits in,

Reviewed-by: Sascha Bischoff <sascha.bischoff@arm.com>
Fixes: c259d763e6 ("KVM: arm64: Account for RES1 bits in DECLARE_FEAT_MAP() and co")
Link: https://sashiko.dev/#/patchset/20260319154937.3619520-1-sascha.bischoff%40arm.com
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20260401103611.357092-6-maz@kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Marc Zyngier 2026-04-01 11:36:00 +01:00
parent 76efe94b1c
commit d70d4323dd
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/arm64/kvm/config.c
View File

@ -1663,8 +1663,8 @@ static __always_inline void __compute_fgt(struct kvm_vcpu *vcpu, enum vcpu_sysre
clear |= ~nested & m->nmask;
}
val |= set;
val &= ~clear;
val |= set | m->res1;
val &= ~(clear | m->res0);
*vcpu_fgt(vcpu, reg) = val;
}