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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>

authored by

Mark Rutland and committed by
Marc Zyngier 334a1a1e 9ace4753

+1 -1
+1 -1
arch/arm64/kvm/hyp/include/hyp/switch.h
··· 495 495 /* 496 496 * When the guest owns the FP regs, we know that guest+hyp traps for 497 497 * any FPSIMD/SVE/SME features exposed to the guest have been disabled 498 - * by either fpsimd_lazy_switch_to_guest() or kvm_hyp_handle_fpsimd() 498 + * by either __activate_cptr_traps() or kvm_hyp_handle_fpsimd() 499 499 * prior to __guest_entry(). As __guest_entry() guarantees a context 500 500 * synchronization event, we don't need an ISB here to avoid taking 501 501 * traps for anything that was exposed to the guest.