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authorAndre Przywara <andre.przywara@linaro.org>2013-04-17 12:52:01 +0200
committerChristoffer Dall <cdall@cs.columbia.edu>2013-04-28 22:23:23 -0700
commitd4e071ce6acf8d5eddb7615a953193a8b0ad7c38 (patch)
tree13dd45233d5d1cf0a579629128ab8aa386552456 /arch/arm/kvm
parentdf759217386fcff9c5e45547d1578270fd592a1b (diff)
ARM: KVM: iterate over all CPUs for CPU compatibility check
kvm_target_cpus() checks the compatibility of the used CPU with KVM, which is currently limited to ARM Cortex-A15 cores. However by calling it only once on any random CPU it assumes that all cores are the same, which is not necessarily the case (for example in Big.Little). [ I cut some of the commit message and changed the formatting of the code slightly to pass checkpatch and look more like the rest of the kvm/arm init code - Christoffer ] Signed-off-by: Andre Przywara <andre.przywara@linaro.org> Signed-off-by: Christoffer Dall <cdall@cs.columbia.edu>
Diffstat (limited to 'arch/arm/kvm')
-rw-r--r--arch/arm/kvm/arm.c15
1 files changed, 12 insertions, 3 deletions
diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c
index 089c0a40514c..5bc99b452b04 100644
--- a/arch/arm/kvm/arm.c
+++ b/arch/arm/kvm/arm.c
@@ -947,21 +947,30 @@ out_err:
return err;
}
+static void check_kvm_target_cpu(void *ret)
+{
+ *(int *)ret = kvm_target_cpu();
+}
+
/**
* Initialize Hyp-mode and memory mappings on all CPUs.
*/
int kvm_arch_init(void *opaque)
{
int err;
+ int ret, cpu;
if (!is_hyp_mode_available()) {
kvm_err("HYP mode not available\n");
return -ENODEV;
}
- if (kvm_target_cpu() < 0) {
- kvm_err("Target CPU not supported!\n");
- return -ENODEV;
+ for_each_online_cpu(cpu) {
+ smp_call_function_single(cpu, check_kvm_target_cpu, &ret, 1);
+ if (ret < 0) {
+ kvm_err("Error, CPU %d not supported!\n", cpu);
+ return -ENODEV;
+ }
}
err = init_hyp_mode();