[PATCH v9 06/30] KVM: arm64: Pay attention to FFR parameter in SVE save and load
From: Mark Brown <broonie@kernel.org>
Date: 2025-12-23 01:22:00
Also in:
kvm, kvmarm, linux-doc, linux-kselftest, lkml
Subsystem:
arm64 port (aarch64 architecture), kernel virtual machine for arm64 (kvm/arm64), the rest · Maintainers:
Catalin Marinas, Will Deacon, Marc Zyngier, Oliver Upton, Linus Torvalds
The hypervisor copies of the SVE save and load functions are prototyped with third arguments specifying FFR should be accessed but the assembly functions overwrite whatever is supplied to unconditionally access FFR. Remove this and use the supplied parameter. This has no effect currently since FFR is always present for SVE but will be important for SME. Signed-off-by: Mark Brown <broonie@kernel.org> --- arch/arm64/kvm/hyp/fpsimd.S | 2 -- 1 file changed, 2 deletions(-)
diff --git a/arch/arm64/kvm/hyp/fpsimd.S b/arch/arm64/kvm/hyp/fpsimd.S
index e950875e31ce..6e16cbfc5df2 100644
--- a/arch/arm64/kvm/hyp/fpsimd.S
+++ b/arch/arm64/kvm/hyp/fpsimd.S@@ -21,13 +21,11 @@ SYM_FUNC_START(__fpsimd_restore_state) SYM_FUNC_END(__fpsimd_restore_state) SYM_FUNC_START(__sve_restore_state) - mov x2, #1 sve_load 0, x1, x2, 3 ret SYM_FUNC_END(__sve_restore_state) SYM_FUNC_START(__sve_save_state) - mov x2, #1 sve_save 0, x1, x2, 3 ret SYM_FUNC_END(__sve_save_state)
--
2.47.3