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authorLinus Torvalds <torvalds@linux-foundation.org>2014-02-28 11:45:03 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2014-02-28 11:45:03 -0800
commitd8efcf38b13df3e9e889cf7cc214cb85dc53600c (patch)
treeb47d0f6217a2fb70d77338f2f5f2f231ee47ce62 /arch/arm
parent78d9e93440dd6a31d6175fbecb2f2b446d821f7c (diff)
parent1b385cbdd74aa803e966e01e5fe49490d6044e30 (diff)
downloadop-kernel-dev-d8efcf38b13df3e9e889cf7cc214cb85dc53600c.zip
op-kernel-dev-d8efcf38b13df3e9e889cf7cc214cb85dc53600c.tar.gz
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM fixes from Paolo Bonzini: "Three x86 fixes and one for ARM/ARM64. In particular, nested virtualization on Intel is broken in 3.13 and fixed by this pull request" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: kvm, vmx: Really fix lazy FPU on nested guest kvm: x86: fix emulator buffer overflow (CVE-2014-0049) arm/arm64: KVM: detect CPU reset on CPU_PM_EXIT KVM: MMU: drop read-only large sptes when creating lower level sptes
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/kvm/arm.c3
-rw-r--r--arch/arm/kvm/interrupts.S11
2 files changed, 12 insertions, 2 deletions
diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c
index 1d8248e..bd18bb8 100644
--- a/arch/arm/kvm/arm.c
+++ b/arch/arm/kvm/arm.c
@@ -878,7 +878,8 @@ static int hyp_init_cpu_pm_notifier(struct notifier_block *self,
unsigned long cmd,
void *v)
{
- if (cmd == CPU_PM_EXIT) {
+ if (cmd == CPU_PM_EXIT &&
+ __hyp_get_vectors() == hyp_default_vectors) {
cpu_init_hyp_mode(NULL);
return NOTIFY_OK;
}
diff --git a/arch/arm/kvm/interrupts.S b/arch/arm/kvm/interrupts.S
index ddc1553..0d68d40 100644
--- a/arch/arm/kvm/interrupts.S
+++ b/arch/arm/kvm/interrupts.S
@@ -220,6 +220,10 @@ after_vfp_restore:
* in Hyp mode (see init_hyp_mode in arch/arm/kvm/arm.c). Return values are
* passed in r0 and r1.
*
+ * A function pointer with a value of 0xffffffff has a special meaning,
+ * and is used to implement __hyp_get_vectors in the same way as in
+ * arch/arm/kernel/hyp_stub.S.
+ *
* The calling convention follows the standard AAPCS:
* r0 - r3: caller save
* r12: caller save
@@ -363,6 +367,11 @@ hyp_hvc:
host_switch_to_hyp:
pop {r0, r1, r2}
+ /* Check for __hyp_get_vectors */
+ cmp r0, #-1
+ mrceq p15, 4, r0, c12, c0, 0 @ get HVBAR
+ beq 1f
+
push {lr}
mrs lr, SPSR
push {lr}
@@ -378,7 +387,7 @@ THUMB( orr lr, #1)
pop {lr}
msr SPSR_csxf, lr
pop {lr}
- eret
+1: eret
guest_trap:
load_vcpu @ Load VCPU pointer to r0
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