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authorLinus Torvalds <torvalds@linux-foundation.org>2016-04-05 16:16:00 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-04-05 16:16:00 -0700
commit541d8f4d59d79f5d37c8c726f723d42ff307db57 (patch)
tree94c0273fd120338be5942e03da3d529b19bd35f2 /arch/arm
parent5003bc6cc60ef700692da9bf4d3953aa0770d300 (diff)
parent95272c29378ee7dc15f43fa2758cb28a5913a06d (diff)
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM fixes from Paolo Bonzini: "Miscellaneous bugfixes. The ARM and s390 fixes are for new regressions from the merge window, others are usual stable material" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: compiler-gcc: disable -ftracer for __noclone functions kvm: x86: make lapic hrtimer pinned s390/mm/kvm: fix mis-merge in gmap handling kvm: set page dirty only if page has been writable KVM: x86: reduce default value of halt_poll_ns parameter KVM: Hyper-V: do not do hypercall userspace exits if SynIC is disabled KVM: x86: Inject pending interrupt even if pending nmi exist arm64: KVM: Register CPU notifiers when the kernel runs at HYP arm64: kvm: 4.6-rc1: Fix VTCR_EL2 VS setting
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/kvm/arm.c52
1 files changed, 33 insertions, 19 deletions
diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c
index 6accd66d26f0..b5384311dec4 100644
--- a/arch/arm/kvm/arm.c
+++ b/arch/arm/kvm/arm.c
@@ -1061,15 +1061,27 @@ static void cpu_init_hyp_mode(void *dummy)
kvm_arm_init_debug();
}
+static void cpu_hyp_reinit(void)
+{
+ if (is_kernel_in_hyp_mode()) {
+ /*
+ * cpu_init_stage2() is safe to call even if the PM
+ * event was cancelled before the CPU was reset.
+ */
+ cpu_init_stage2(NULL);
+ } else {
+ if (__hyp_get_vectors() == hyp_default_vectors)
+ cpu_init_hyp_mode(NULL);
+ }
+}
+
static int hyp_init_cpu_notify(struct notifier_block *self,
unsigned long action, void *cpu)
{
switch (action) {
case CPU_STARTING:
case CPU_STARTING_FROZEN:
- if (__hyp_get_vectors() == hyp_default_vectors)
- cpu_init_hyp_mode(NULL);
- break;
+ cpu_hyp_reinit();
}
return NOTIFY_OK;
@@ -1084,9 +1096,8 @@ static int hyp_init_cpu_pm_notifier(struct notifier_block *self,
unsigned long cmd,
void *v)
{
- if (cmd == CPU_PM_EXIT &&
- __hyp_get_vectors() == hyp_default_vectors) {
- cpu_init_hyp_mode(NULL);
+ if (cmd == CPU_PM_EXIT) {
+ cpu_hyp_reinit();
return NOTIFY_OK;
}
@@ -1128,6 +1139,22 @@ static int init_subsystems(void)
int err;
/*
+ * Register CPU Hotplug notifier
+ */
+ cpu_notifier_register_begin();
+ err = __register_cpu_notifier(&hyp_init_cpu_nb);
+ cpu_notifier_register_done();
+ if (err) {
+ kvm_err("Cannot register KVM init CPU notifier (%d)\n", err);
+ return err;
+ }
+
+ /*
+ * Register CPU lower-power notifier
+ */
+ hyp_cpu_pm_init();
+
+ /*
* Init HYP view of VGIC
*/
err = kvm_vgic_hyp_init();
@@ -1270,19 +1297,6 @@ static int init_hyp_mode(void)
free_boot_hyp_pgd();
#endif
- cpu_notifier_register_begin();
-
- err = __register_cpu_notifier(&hyp_init_cpu_nb);
-
- cpu_notifier_register_done();
-
- if (err) {
- kvm_err("Cannot register HYP init CPU notifier (%d)\n", err);
- goto out_err;
- }
-
- hyp_cpu_pm_init();
-
/* set size of VMID supported by CPU */
kvm_vmid_bits = kvm_get_vmid_bits();
kvm_info("%d-bit VMID\n", kvm_vmid_bits);