From: Marc Zyngier <marc.zyngier@xxxxxxx>
This patch looks like it should be in the 3.10-stable tree, should we apply
it?
------------------
From: "Marc Zyngier <marc.zyngier@xxxxxxx>"
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: <stable@xxxxxxxxxxxxxxx> # 3.10.x: 6a077e4a: ARM: KVM: perform
Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>
Signed-off-by: Christoffer Dall <christoffer.dall@xxxxxxxxxx>
Signed-off-by: Jonghwan Choi <jhbird.choi@xxxxxxxxxxx>
---
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 majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html