From d4e071ce6acf8d5eddb7615a953193a8b0ad7c38 Mon Sep 17 00:00:00 2001 From: Andre Przywara Date: Wed, 17 Apr 2013 12:52:01 +0200 Subject: [PATCH] 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 Signed-off-by: Christoffer Dall --- arch/arm/kvm/arm.c | 15 ++++++++++++--- 1 file 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(); -- 2.20.1