From mboxrd@z Thu Jan 1 00:00:00 1970 From: jintack@cs.columbia.edu (Jintack Lim) Date: Mon, 9 Jan 2017 01:24:44 -0500 Subject: [RFC 48/55] KVM: arm64: Emulate TLBI instruction In-Reply-To: <1483943091-1364-1-git-send-email-jintack@cs.columbia.edu> References: <1483943091-1364-1-git-send-email-jintack@cs.columbia.edu> Message-ID: <1483943091-1364-49-git-send-email-jintack@cs.columbia.edu> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org From: Christoffer Dall Currently, we flush ALL shadow stage-2 page tables on the tlbi instruction execution. We may be able to do this more efficiently by considering the vttbr_el2 value of the guest hypervisor, but leave it for now. Signed-off-by: Christoffer Dall Signed-off-by: Jintack Lim --- arch/arm64/kvm/sys_regs.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index ddb641c..b0a057d 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -2013,8 +2013,14 @@ static int emulate_sys_reg(struct kvm_vcpu *vcpu, static int emulate_tlbi(struct kvm_vcpu *vcpu, struct sys_reg_params *params) { - /* TODO: support tlbi instruction emulation*/ - kvm_inject_undefined(vcpu); + /* + * We unmap ALL stage-2 page tables on tlbi instruction. + * We may make it more efficient by looking at the exact tlbi + * instruction. + */ + stage2_unmap_vm(vcpu->kvm); + kvm_nested_s2_unmap(vcpu); + return 1; } -- 1.9.1