From: Marc Zyngier <[email protected]> This patch looks like it should be in the 3.10-stable tree, should we apply it?
------------------ From: "Marc Zyngier <[email protected]>" commit 479c5ae2f8a55509b691494cd13691d3dc31d102 upstream When performing a Stage-2 TLB invalidation, it is necessary to make sure the write to the page tables is observable by all CPUs. For this purpose, add a dsb instruction to __kvm_tlb_flush_vmid_ipa before doing the TLB invalidation itself. Cc: <[email protected]> # 3.10.x: 6a077e4a: ARM: KVM: perform Signed-off-by: Marc Zyngier <[email protected]> Signed-off-by: Christoffer Dall <[email protected]> Signed-off-by: Jonghwan Choi <[email protected]> --- arch/arm/kvm/interrupts.S | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/kvm/interrupts.S b/arch/arm/kvm/interrupts.S index bc7892ba1..ba904c0 100644 --- a/arch/arm/kvm/interrupts.S +++ b/arch/arm/kvm/interrupts.S @@ -46,6 +46,7 @@ __kvm_hyp_code_start: ENTRY(__kvm_tlb_flush_vmid) push {r2, r3} + dsb ishst add r0, r0, #KVM_VTTBR ldrd r2, r3, [r0] mcrr p15, 6, r2, r3, c2 @ Write VTTBR -- 1.8.1.2 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
