[PATCH 07/10] KVM: arm64: Save guest's ZCR_EL1 before saving the FPSIMD state

Marc Zyngier maz at kernel.org
Tue Mar 16 10:13:09 GMT 2021


Make sure the guest's ZCR_EL1 is saved before we save/flush the
state. This will be useful in later patches.

Signed-off-by: Marc Zyngier <maz at kernel.org>
---
 arch/arm64/kvm/fpsimd.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/kvm/fpsimd.c b/arch/arm64/kvm/fpsimd.c
index 84afca5ed6f2..b5f95abd23f5 100644
--- a/arch/arm64/kvm/fpsimd.c
+++ b/arch/arm64/kvm/fpsimd.c
@@ -121,10 +121,10 @@ void kvm_arch_vcpu_put_fp(struct kvm_vcpu *vcpu)
 	local_irq_save(flags);
 
 	if (vcpu->arch.flags & KVM_ARM64_FP_ENABLED) {
-		fpsimd_save_and_flush_cpu_state();
-
 		if (guest_has_sve)
 			__vcpu_sys_reg(vcpu, ZCR_EL1) = read_sysreg_el1(SYS_ZCR);
+
+		fpsimd_save_and_flush_cpu_state();
 	} else if (host_has_sve) {
 		/*
 		 * The FPSIMD/SVE state in the CPU has not been touched, and we
-- 
2.29.2




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