diff options
Diffstat (limited to 'arch/arm64/kvm/hyp/switch.c')
| -rw-r--r-- | arch/arm64/kvm/hyp/switch.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/arm64/kvm/hyp/switch.c b/arch/arm64/kvm/hyp/switch.c index d9645236e474..c0796c4d93a5 100644 --- a/arch/arm64/kvm/hyp/switch.c +++ b/arch/arm64/kvm/hyp/switch.c @@ -318,6 +318,30 @@ static bool __hyp_text __skip_instr(struct kvm_vcpu *vcpu) } } +void __hyp_text __hyp_switch_fpsimd(u64 esr __always_unused, + struct kvm_vcpu *vcpu) +{ + kvm_cpu_context_t *host_ctxt; + + if (has_vhe()) + write_sysreg(read_sysreg(cpacr_el1) | CPACR_EL1_FPEN, + cpacr_el1); + else + write_sysreg(read_sysreg(cptr_el2) & ~(u64)CPTR_EL2_TFP, + cptr_el2); + + isb(); + + host_ctxt = kern_hyp_va(vcpu->arch.host_cpu_context); + __fpsimd_save_state(&host_ctxt->gp_regs.fp_regs); + __fpsimd_restore_state(&vcpu->arch.ctxt.gp_regs.fp_regs); + + /* Skip restoring fpexc32 for AArch64 guests */ + if (!(read_sysreg(hcr_el2) & HCR_RW)) + write_sysreg(vcpu->arch.ctxt.sys_regs[FPEXC32_EL2], + fpexc32_el2); +} + /* * Return true when we were able to fixup the guest exit and should return to * the guest, false when we should restore the host state and return to the |