Commit 556f2a52 authored Apr 22, 2016 by James Hogan Committed by Paolo Bonzini May 10, 2016

MIPS: KVM: Fix preemption warning reading FPU capability



Reading the KVM_CAP_MIPS_FPU capability returns cpu_has_fpu, however
this uses smp_processor_id() to read the current CPU capabilities (since
some old MIPS systems could have FPUs present on only a subset of CPUs).

We don't support any such systems, so work around the warning by using
raw_cpu_has_fpu instead.

We should probably instead claim not to support FPU at all if any one
CPU is lacking an FPU, but this should do for now.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Radim KrÄmÃ¡Å™" <rkrcmar@redhat.com>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

parent f049729c

arch/mips/kvm/mips.c

+2 −1

Original line number	Original line	Diff line number	Diff line
	@@ -1079,7 +1079,8 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
	r = KVM_COALESCED_MMIO_PAGE_OFFSET;		r = KVM_COALESCED_MMIO_PAGE_OFFSET;
	break;		break;
	case KVM_CAP_MIPS_FPU:		case KVM_CAP_MIPS_FPU:
	r = !!cpu_has_fpu;		/* We don't handle systems with inconsistent cpu_has_fpu */
			r = !!raw_cpu_has_fpu;
	break;		break;
	case KVM_CAP_MIPS_MSA:		case KVM_CAP_MIPS_MSA:
	/*		/*