Commit 87bb39ed authored by Fuad Tabba's avatar Fuad Tabba Committed by Marc Zyngier
Browse files

KVM: arm64: Reintroduce __sve_save_state 



Now that the hypervisor is handling the host sve state in
protected mode, it needs to be able to save it.

This reverts commit e66425fc ("KVM: arm64: Remove unused
__sve_save_state").

Reviewed-by: default avatarOliver Upton <oliver.upton@linux.dev>
Signed-off-by: default avatarFuad Tabba <tabba@google.com>
Link: https://lore.kernel.org/r/20240603122852.3923848-2-tabba@google.com


Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
parent 47eb2d68

arch/arm64/include/asm/kvm_hyp.h

+1 −0
Original line number Diff line number Diff line
@@ -111,6 +111,7 @@ void __debug_restore_host_buffers_nvhe(struct kvm_vcpu *vcpu); 


void __fpsimd_save_state(struct user_fpsimd_state *fp_regs);

void __fpsimd_restore_state(struct user_fpsimd_state *fp_regs);

void __sve_save_state(void *sve_pffr, u32 *fpsr);

void __sve_restore_state(void *sve_pffr, u32 *fpsr);



u64 __guest_enter(struct kvm_vcpu *vcpu);

arch/arm64/kvm/hyp/fpsimd.S

+6 −0
Original line number Diff line number Diff line
@@ -25,3 +25,9 @@ SYM_FUNC_START(__sve_restore_state) 
	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)