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| author | Mark McLoughlin <markmc@redhat.com> | 2009-05-20 15:36:18 -0300 |
|---|---|---|
| committer | Anthony Liguori <aliguori@us.ibm.com> | 2009-05-20 15:21:28 -0500 |
| commit | 0926c7a4e5abd3cfebec3a6e35617730577ce932 (patch) | |
| tree | ed21db957f74aa0f0c9fbd8612ef495bdaf6c299 | |
| parent | a02ba54eed0bcb588a4746a2702f1337cbfe54f8 (diff) | |
| download | qemu-0926c7a4e5abd3cfebec3a6e35617730577ce932.tar.gz | |
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 <markmc@redhat.com>
Signed-off-by: Glauber Costa <glommer@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
| -rw-r--r-- | target-i386/kvm.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/target-i386/kvm.c b/target-i386/kvm.c index 5b52de34dd..eb615989ea 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); |