| From | Jintack Lim <> | Subject | [RFC 20/55] KVM: arm64: Forward CPACR_EL1 traps to the guest hypervisor | Date | Mon, 9 Jan 2017 01:24:16 -0500 |
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Forward CPACR_EL1 traps to the guest hypervisor if it has configured the virtual CPTR_EL2 to do so.
Signed-off-by: Jintack Lim <jintack@cs.columbia.edu> --- arch/arm64/kvm/sys_regs.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index 321ecbc..e66f40d 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -951,6 +951,11 @@ static bool access_cpacr(struct kvm_vcpu *vcpu, struct sys_reg_params *p, const struct sys_reg_desc *r) { + /* Forward this trap to the guest hypervisor if it expects */ + if (!vcpu_mode_el2(vcpu) && + (vcpu_el2_reg(vcpu, CPTR_EL2) & CPTR_EL2_TCPAC)) + return kvm_inject_nested_sync(vcpu, kvm_vcpu_get_hsr(vcpu)); + access_rw(p, &vcpu_sys_reg(vcpu, r->reg)); return true; } -- 1.9.1
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