From 0926c7a4e5abd3cfebec3a6e35617730577ce932 Mon Sep 17 00:00:00 2001 From: Mark McLoughlin Date: Wed, 20 May 2009 15:36:18 -0300 Subject: [PATCH] kvm: work around supported cpuid ioctl() brokenness KVM_GET_SUPPORTED_CPUID has been known to fail to return -E2BIG when it runs out of entries. Detect this by always trying again with a bigger table if the ioctl() fills the table. Signed-off-by: Mark McLoughlin Signed-off-by: Glauber Costa Signed-off-by: Anthony Liguori --- target-i386/kvm.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/target-i386/kvm.c b/target-i386/kvm.c index 5b52de34dd6..eb615989ea0 100644 --- a/target-i386/kvm.c +++ b/target-i386/kvm.c @@ -44,6 +44,9 @@ static struct kvm_cpuid2 *try_get_cpuid(KVMState *s, int max) cpuid = (struct kvm_cpuid2 *)qemu_mallocz(size); cpuid->nent = max; r = kvm_ioctl(s, KVM_GET_SUPPORTED_CPUID, cpuid); + if (r == 0 && cpuid->nent >= max) { + r = -E2BIG; + } if (r < 0) { if (r == -E2BIG) { qemu_free(cpuid); -- 2.39.5