KVM: arm64: Fix comment in fpsimd_lazy_switch_to_host()

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@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>

diff --git a/arch/arm64/kvm/hyp/include/hyp/switch.h b/arch/arm64/kvm/hyp/include/hyp/switch.h
index c5d5e5b86eaf0292e1d32443bf011c62664ca2d0..8dce3da85da356ac0ee7abffb02995318d3a1a63 100644 (file)
--- 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.