[PATCH 1/3] KVM: arm64: Fix comment in fpsimd_lazy_switch_to_host()
Mark Rutland
mark.rutland at arm.com
Tue Jan 6 09:37:05 PST 2026
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:
59419f10045b ("KVM: arm64: Eagerly switch ZCR_EL{1,2}")
Fix the comment.
Fixes: 59419f10045b ("KVM: arm64: Eagerly switch ZCR_EL{1,2}")
Signed-off-by: Mark Rutland <mark.rutland at arm.com>
Cc: Catalin Marinas <catalin.marinas at arm.com>
Cc: Fuad Tabba <tabba at google.com>
Cc: Marc Zyngier <maz at kernel.org>
Cc: Mark Brown <broonie at kernel.org>
Cc: Oliver Upton <oliver.upton at linux.dev>
Cc: Will Deacon <will at kernel.org>
---
arch/arm64/kvm/hyp/include/hyp/switch.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64/kvm/hyp/include/hyp/switch.h b/arch/arm64/kvm/hyp/include/hyp/switch.h
index c5d5e5b86eaf0..8dce3da85da35 100644
--- a/arch/arm64/kvm/hyp/include/hyp/switch.h
+++ b/arch/arm64/kvm/hyp/include/hyp/switch.h
@@ -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.
--
2.30.2
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