From 41408c28f283b49202ae374b1c42bc8e9b33a048 Mon Sep 17 00:00:00 2001 From: Thomas Huth Date: Fri, 6 Feb 2015 15:01:21 +0100 Subject: [PATCH] KVM: s390: Add MEMOP ioctls for reading/writing guest memory On s390, we've got to make sure to hold the IPTE lock while accessing logical memory. So let's add an ioctl for reading and writing logical memory to provide this feature for userspace, too. The maximum transfer size of this call is limited to 64kB to prevent that the guest can trigger huge copy_from/to_user transfers. QEMU currently only requests up to one or two pages so far, so 16*4kB seems to be a reasonable limit here. Signed-off-by: Thomas Huth Signed-off-by: Christian Borntraeger --- Reading git-format-patch failed