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KVM: Limit vcpu mmap size to one page on non-x86

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The second page is only needed on archs that support pio.

Noted by Carsten Otte.

Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Avi Kivity 2008-01-24 15:13:08 +02:00
parent d196e34336
commit adb1ff4675
1 changed files with 4 additions and 1 deletions
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5
virt/kvm/kvm_main.c
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@ -1061,7 +1061,10 @@ static long kvm_dev_ioctl(struct file *filp,
r = -EINVAL; r = -EINVAL;
if (arg) if (arg)
goto out; goto out;
r = 2 * PAGE_SIZE; r = PAGE_SIZE; /* struct kvm_run */
#ifdef CONFIG_X86
r += PAGE_SIZE; /* pio data page */
#endif
break; break;
default: default:
return kvm_arch_dev_ioctl(filp, ioctl, arg); return kvm_arch_dev_ioctl(filp, ioctl, arg);