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[v1,1/7] KVM: arm64: Reintroduce __sve_save_state

Message ID 20240517131814.719933-2-tabba@google.com (mailing list archive)
State New
Headers show
Series KVM: arm64: Fix handling of host fpsimd/sve state in protected mode | expand

Commit Message

Fuad Tabba May 17, 2024, 1:18 p.m. UTC 
Now that the hypervisor is handling the host sve state in
protected mode, it needs to be able to save it.

This reverts commit e66425fc9ba3 ("KVM: arm64: Remove unused
__sve_save_state").

Signed-off-by: Fuad Tabba <tabba@google.com>
---
 arch/arm64/include/asm/kvm_hyp.h | 1 +
 arch/arm64/kvm/hyp/fpsimd.S      | 6 ++++++
 2 files changed, 7 insertions(+)
diff mbox series

Patch

diff --git a/arch/arm64/include/asm/kvm_hyp.h b/arch/arm64/include/asm/kvm_hyp.h
index 3e80464f8953..2ab23589339a 100644
--- a/arch/arm64/include/asm/kvm_hyp.h
+++ b/arch/arm64/include/asm/kvm_hyp.h
@@ -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);
diff --git a/arch/arm64/kvm/hyp/fpsimd.S b/arch/arm64/kvm/hyp/fpsimd.S
index 61e6f3ba7b7d..e950875e31ce 100644
--- a/arch/arm64/kvm/hyp/fpsimd.S
+++ b/arch/arm64/kvm/hyp/fpsimd.S
@@ -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)