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>

parent d196e343

virt/kvm/kvm_main.c

+4 −1

Original line number	Diff line number	Diff line
		@@ -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);