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KVM: arm64: Save guest's ZCR_EL1 before saving the FPSIMD state 

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>
This commit is contained in:
Marc Zyngier 2021-03-12 14:30:52 +00:00
parent 0a9a98fda3
commit b145a8437a
1 changed files with 2 additions and 2 deletions
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4
arch/arm64/kvm/fpsimd.c
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@ -121,10 +121,10 @@ void kvm_arch_vcpu_put_fp(struct kvm_vcpu *vcpu)
local_irq_save(flags); local_irq_save(flags);
if (vcpu->arch.flags & KVM_ARM64_FP_ENABLED) { if (vcpu->arch.flags & KVM_ARM64_FP_ENABLED) {
fpsimd_save_and_flush_cpu_state();
if (guest_has_sve) if (guest_has_sve)
__vcpu_sys_reg(vcpu, ZCR_EL1) = read_sysreg_el1(SYS_ZCR); __vcpu_sys_reg(vcpu, ZCR_EL1) = read_sysreg_el1(SYS_ZCR);
fpsimd_save_and_flush_cpu_state();
} else if (host_has_sve) { } else if (host_has_sve) {
/* /*
* The FPSIMD/SVE state in the CPU has not been touched, and we * The FPSIMD/SVE state in the CPU has not been touched, and we