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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>
This commit is contained in:
Andre Przywara 2013-04-17 12:52:01 +02:00 committed by Christoffer Dall
parent df75921738
commit d4e071ce6a
1 changed files with 12 additions and 3 deletions
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15
arch/arm/kvm/arm.c
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@ -947,21 +947,30 @@ out_err:
return 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. * Initialize Hyp-mode and memory mappings on all CPUs.
*/ */
int kvm_arch_init(void *opaque) int kvm_arch_init(void *opaque)
{ {
int err; int err;
int ret, cpu;
if (!is_hyp_mode_available()) { if (!is_hyp_mode_available()) {
kvm_err("HYP mode not available\n"); kvm_err("HYP mode not available\n");
return -ENODEV; return -ENODEV;
} }
if (kvm_target_cpu() < 0) { for_each_online_cpu(cpu) {
kvm_err("Target CPU not supported!\n"); smp_call_function_single(cpu, check_kvm_target_cpu, &ret, 1);
return -ENODEV; if (ret < 0) {
kvm_err("Error, CPU %d not supported!\n", cpu);
return -ENODEV;
}
} }
err = init_hyp_mode(); err = init_hyp_mode();