linux-toradex.git/drivers/lguest/page_tables.c, branch v3.15.6 Linux kernel for Apalis and Colibri modules drivers/lguest/page_tables.c: rename do_set_pte() 2014-04-07T23:35:52+00:00 Andrew Morton akpm@linux-foundation.org 2014-04-07T22:37:16+00:00 179e09637c1bb17c0b6fb347353c7c52e6931fa5 "mm: introduce vm_ops->map_pages()" wants to export a do_set_pte() from core kernel. Rename lguest's do_set_pte() to something more lguest-specific. Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 
"mm: introduce vm_ops->map_pages()" wants to export a do_set_pte() from core
kernel.  Rename lguest's do_set_pte() to something more lguest-specific.

Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
lguest: fix BUG_ON() in invalid guest page table. 2013-09-05T22:39:26+00:00 Rusty Russell rusty@rustcorp.com.au 2013-09-05T08:15:39+00:00 4623c28e222d82f87537ef66db61ebcfbd8306db If we discover the entry is invalid, we kill the guest, but we must avoid calling gpte_addr() on the invalid pmd, otherwise: kernel BUG at drivers/lguest/page_tables.c:157! Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> 
If we discover the entry is invalid, we kill the guest, but we must
avoid calling gpte_addr() on the invalid pmd, otherwise:

	kernel BUG at drivers/lguest/page_tables.c:157!

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
lguest: fix CONFIG_PAE -> CONFIG_x86_PAE in comment 2013-05-29T13:13:05+00:00 Paul Bolle pebolle@tiscali.nl 2013-05-29T07:30:19+00:00 e3d1848f29d6f02d74ea978e1a699bde5802d7d4 Signed-off-by: Paul Bolle <pebolle@tiscali.nl> Signed-off-by: Jiri Kosina <jkosina@suse.cz> 
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
lguest: clear cached last cpu when guest_set_pgd() called. 2013-05-08T01:19:18+00:00 Rusty Russell rusty@rustcorp.com.au 2013-05-08T00:36:55+00:00 f616fe4feee4000c2995d2d1e1981513bf9ab0d4 commit v3.9-rc1-53-g6d0cda9 "lguest: cache last cpu we ran on." missed one case, which causes a triple fault. The guest calls guest_set_pgd() on the top page, and we carefully remap the Switcher text page. But we didn't reset last_host_cpu, so map_switcher_in_guest() thinks the guest's regs and IDT/GDT etc are already mapped. Reported-by: Paul Bolle <pebolle@tiscali.nl> Tested-by: Paul Bolle <pebolle@tiscali.nl> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> 
commit v3.9-rc1-53-g6d0cda9 "lguest: cache last cpu we ran on." missed
one case, which causes a triple fault.  The guest calls guest_set_pgd()
on the top page, and we carefully remap the Switcher text page.  But
we didn't reset last_host_cpu, so map_switcher_in_guest() thinks
the guest's regs and IDT/GDT etc are already mapped.

Reported-by: Paul Bolle <pebolle@tiscali.nl>
Tested-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Merge tag 'virtio-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux 2013-05-02T21:14:04+00:00 Linus Torvalds torvalds@linux-foundation.org 2013-05-02T21:14:04+00:00 736a2dd2571ac56b11ed95a7814d838d5311be04 Pull virtio & lguest updates from Rusty Russell: "Lots of virtio work which wasn't quite ready for last merge window. Plus I dived into lguest again, reworking the pagetable code so we can move the switcher page: our fixmaps sometimes take more than 2MB now..." Ugh. Annoying conflicts with the tcm_vhost -> vhost_scsi rename. Hopefully correctly resolved. * tag 'virtio-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: (57 commits) caif_virtio: Remove bouncing email addresses lguest: improve code readability in lg_cpu_start. virtio-net: fill only rx queues which are being used lguest: map Switcher below fixmap. lguest: cache last cpu we ran on. lguest: map Switcher text whenever we allocate a new pagetable. lguest: don't share Switcher PTE pages between guests. lguest: expost switcher_pages array (as lg_switcher_pages). lguest: extract shadow PTE walking / allocating. lguest: make check_gpte et. al return bool. lguest: assume Switcher text is a single page. lguest: rename switcher_page to switcher_pages. lguest: remove RESERVE_MEM constant. lguest: check vaddr not pgd for Switcher protection. lguest: prepare to make SWITCHER_ADDR a variable. virtio: console: replace EMFILE with EBUSY for already-open port virtio-scsi: reset virtqueue affinity when doing cpu hotplug virtio-scsi: introduce multiqueue support virtio-scsi: push vq lock/unlock into virtscsi_vq_done virtio-scsi: pass struct virtio_scsi to virtqueue completion function ... 
Pull virtio & lguest updates from Rusty Russell:
 "Lots of virtio work which wasn't quite ready for last merge window.

  Plus I dived into lguest again, reworking the pagetable code so we can
  move the switcher page: our fixmaps sometimes take more than 2MB now..."

Ugh.  Annoying conflicts with the tcm_vhost -> vhost_scsi rename.
Hopefully correctly resolved.

* tag 'virtio-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: (57 commits)
  caif_virtio: Remove bouncing email addresses
  lguest: improve code readability in lg_cpu_start.
  virtio-net: fill only rx queues which are being used
  lguest: map Switcher below fixmap.
  lguest: cache last cpu we ran on.
  lguest: map Switcher text whenever we allocate a new pagetable.
  lguest: don't share Switcher PTE pages between guests.
  lguest: expost switcher_pages array (as lg_switcher_pages).
  lguest: extract shadow PTE walking / allocating.
  lguest: make check_gpte et. al return bool.
  lguest: assume Switcher text is a single page.
  lguest: rename switcher_page to switcher_pages.
  lguest: remove RESERVE_MEM constant.
  lguest: check vaddr not pgd for Switcher protection.
  lguest: prepare to make SWITCHER_ADDR a variable.
  virtio: console: replace EMFILE with EBUSY for already-open port
  virtio-scsi: reset virtqueue affinity when doing cpu hotplug
  virtio-scsi: introduce multiqueue support
  virtio-scsi: push vq lock/unlock into virtscsi_vq_done
  virtio-scsi: pass struct virtio_scsi to virtqueue completion function
  ...
lguest: rename random32() to prandom_u32() 2013-04-30T01:28:43+00:00 Akinobu Mita akinobu.mita@gmail.com 2013-04-29T23:21:34+00:00 10fdc14112f7eaa92577f3d9442a845944af6130 Use preferable function name which implies using a pseudo-random number generator. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Acked-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 
Use preferable function name which implies using a pseudo-random
number generator.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
lguest: cache last cpu we ran on. 2013-04-22T06:15:03+00:00 Rusty Russell rusty@rustcorp.com.au 2013-04-22T04:40:41+00:00 6d0cda93c0d3c8bb0a553047c10f114c88c8af89 This optimizes the frobbing of our Switcher map. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> 
This optimizes the frobbing of our Switcher map.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
lguest: map Switcher text whenever we allocate a new pagetable. 2013-04-22T06:15:02+00:00 Rusty Russell rusty@rustcorp.com.au 2013-04-22T04:40:41+00:00 86935fc4ee4d95efe01b6c91cd5143fa4c38c02b It's always to same, so no need to put in the PTE every time we're about to run. Keep a flag to track whether the pagetable has the Switcher entries allocated, and when allocating always initialize the Switcher text PTE. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> 
It's always to same, so no need to put in the PTE every time we're
about to run.  Keep a flag to track whether the pagetable has the
Switcher entries allocated, and when allocating always initialize the
Switcher text PTE.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
lguest: don't share Switcher PTE pages between guests. 2013-04-22T06:15:01+00:00 Rusty Russell rusty@rustcorp.com.au 2013-04-22T04:40:40+00:00 3412b6ae2924e068f9932f841bdea0f2d8424502 We currently use the whole top PGD entry for the switcher, so we simply share a fixed page of PTEs between all guests (actually, it's one per Host CPU, to ensure isolation between guests). Changes to a scheme where every guest has its own mappings. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> 
We currently use the whole top PGD entry for the switcher, so we
simply share a fixed page of PTEs between all guests (actually, it's
one per Host CPU, to ensure isolation between guests).

Changes to a scheme where every guest has its own mappings.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
lguest: extract shadow PTE walking / allocating. 2013-04-22T06:14:47+00:00 Rusty Russell rusty@rustcorp.com.au 2013-04-22T04:40:39+00:00 17427e08faae3e63271a9c2d0edb6a22e5fbb54b We want a separate find_pte() function so we can call it for populating the switcher PTE entries. We can also use it in page_writable(). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> 
We want a separate find_pte() function so we can call it for populating the
switcher PTE entries.

We can also use it in page_writable().

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>