[PATCH v2 08/11] KVM: arm64: Save guest's ZCR_EL1 before saving the FPSIMD state
From: Marc Zyngier <maz@kernel.org>
Date: 2021-03-18 12:28:14
Also in:
kvm, kvmarm
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
Make sure the guest's ZCR_EL1 is saved before we save/flush the state. This will be useful in later patches. Acked-by: Will Deacon <will@kernel.org> Signed-off-by: Marc Zyngier <maz@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 3c37a419fa82..14ea05c5134a 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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