github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-23 06:31:58 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

KVM: arm64: Fix comment in fpsimd_lazy_switch_to_host()

Browse Source 
The comment in fpsimd_lazy_switch_to_host() erroneously says guest traps
for FPSIMD/SVE/SME are disabled by fpsimd_lazy_switch_to_guest(). In
reality, the traps are disabled by __activate_cptr_traps(), and
fpsimd_lazy_switch_to_guest() only manipulates the SVE vector length.

This was mistake; I accidentally copy+pasted the wrong function name in
commit:

  59419f1004 ("KVM: arm64: Eagerly switch ZCR_EL{1,2}")

Fix the comment.

Fixes: 59419f1004 ("KVM: arm64: Eagerly switch ZCR_EL{1,2}")
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Fuad Tabba <tabba@google.com>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Mark Brown <broonie@kernel.org>
Cc: Oliver Upton <oliver.upton@linux.dev>
Cc: Will Deacon <will@kernel.org>
Tested-by: Fuad Tabba <tabba@google.com>
Reviewed-by: Fuad Tabba <tabba@google.com>
Link: https://patch.msgid.link/20260106173707.3292074-2-mark.rutland@arm.com
Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Mark Rutland 2026-01-06 17:37:05 +00:00 committed by Marc Zyngier
parent 9ace4753a5
commit 334a1a1e1a
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/arm64/kvm/hyp/include/hyp/switch.h
View File

@ -495,7 +495,7 @@ static inline void fpsimd_lazy_switch_to_host(struct kvm_vcpu *vcpu)
/*
* When the guest owns the FP regs, we know that guest+hyp traps for
* any FPSIMD/SVE/SME features exposed to the guest have been disabled
* by either fpsimd_lazy_switch_to_guest() or kvm_hyp_handle_fpsimd()
* by either __activate_cptr_traps() or kvm_hyp_handle_fpsimd()
* prior to __guest_entry(). As __guest_entry() guarantees a context
* synchronization event, we don't need an ISB here to avoid taking
* traps for anything that was exposed to the guest.