Commit d4e071ce authored Apr 17, 2013 by Andre Przywara Committed by Christoffer Dall Apr 28, 2013

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>

parent df759217

arch/arm/kvm/arm.c

+12 −3

Original line number	Diff line number	Diff line
		@@ -947,22 +947,31 @@ 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");
		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();
		if (err)