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| author | Avi Kivity <avi@qumranet.com> | 2008-01-24 15:13:08 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2008-04-27 11:53:17 +0300 |
| commit | adb1ff46754a87f3f6c9e7ee0a92f9a8a183bb38 (patch) | |
| tree | 033c1e021019242d9a47594993cbfaecd62ab540 /virt/kvm/kvm_main.c | |
| parent | d196e343361c229496adeda42335856da9d057de (diff) | |
| download | lwn-adb1ff46754a87f3f6c9e7ee0a92f9a8a183bb38.tar.gz lwn-adb1ff46754a87f3f6c9e7ee0a92f9a8a183bb38.zip | |
KVM: Limit vcpu mmap size to one page on non-x86
The second page is only needed on archs that support pio.
Noted by Carsten Otte.
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'virt/kvm/kvm_main.c')
| -rw-r--r-- | virt/kvm/kvm_main.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 121e65cccc58..7972e3aa2cae 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -1061,7 +1061,10 @@ static long kvm_dev_ioctl(struct file *filp, r = -EINVAL; if (arg) goto out; - r = 2 * PAGE_SIZE; + r = PAGE_SIZE; /* struct kvm_run */ +#ifdef CONFIG_X86 + r += PAGE_SIZE; /* pio data page */ +#endif break; default: return kvm_arch_dev_ioctl(filp, ioctl, arg); |