similar to: [PULL] lguest and virtio.

From: Rusty Russell <rusty@rustcorp.com.au> This is the Kconfig and Makefile to allow lguest to actually be compiled. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> --- drivers/Kconfig | 2 ++ drivers/Makefile | 1 + drivers/lguest/Kconfig | 20

Note that the bulk of this is comment updates and style fixups: the diffstat on the 5 fixes is: Documentation/lguest/lguest.c | 6 - drivers/lguest/lguest_user.c | 5 drivers/virtio/virtio_pci.c | 246 +++++++++++++++++++++++------------------- 3 files changed, 147 insertions(+), 110 deletions(-) The bulk of *that* is the virtio_pci MSI-X support "refactor": I should have

Note that the bulk of this is comment updates and style fixups: the diffstat on the 5 fixes is: Documentation/lguest/lguest.c | 6 - drivers/lguest/lguest_user.c | 5 drivers/virtio/virtio_pci.c | 246 +++++++++++++++++++++++------------------- 3 files changed, 147 insertions(+), 110 deletions(-) The bulk of *that* is the virtio_pci MSI-X support "refactor": I should have

The following changes since commit 3085354de635179d70c240e6d942bcbd1d93056c: Ingo Molnar (1): x86: prefetch fix #2 are available in the git repository at: ssh://master.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus.git master Anthony Liguori (1): virtio_pci: unregister virtio device at device remove Paul Bolle (1): lguest: lguest.txt documentation fix

The following changes since commit 3085354de635179d70c240e6d942bcbd1d93056c: Ingo Molnar (1): x86: prefetch fix #2 are available in the git repository at: ssh://master.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus.git master Anthony Liguori (1): virtio_pci: unregister virtio device at device remove Paul Bolle (1): lguest: lguest.txt documentation fix

The following changes since commit 3c92ec8ae91ecf59d88c798301833d7cf83f2179: Linus Torvalds (1): Merge branch 'next' of git://git.kernel.org/.../paulus/powerpc are available in the git repository at: ssh://master.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus.git master

The following changes since commit 3c92ec8ae91ecf59d88c798301833d7cf83f2179: Linus Torvalds (1): Merge branch 'next' of git://git.kernel.org/.../paulus/powerpc are available in the git repository at: ssh://master.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus.git master

On Mon, Sep 21, 2009 at 04:52:21PM +0930, Rusty Russell wrote: > > We still assume the Guest and Host have the same PAGE_OFFSET settings, > but now we don't assume 0xC0000000. > > Signed-off-by: Rusty Russell <rusty at rustcorp.com.au> > Cc: Matias Zabaljauregui <zabaljauregui at gmail.com> > --- > drivers/lguest/page_tables.c | 6 ++---- > 1 file

On Mon, Sep 21, 2009 at 04:52:21PM +0930, Rusty Russell wrote: > > We still assume the Guest and Host have the same PAGE_OFFSET settings, > but now we don't assume 0xC0000000. > > Signed-off-by: Rusty Russell <rusty at rustcorp.com.au> > Cc: Matias Zabaljauregui <zabaljauregui at gmail.com> > --- > drivers/lguest/page_tables.c | 6 ++---- > 1 file

Hi, this version requires that host and guest have the same PAE status. NX cap is not offered to the guest, yet. Thanks, Matias Lguest PAE support Signed-off-by: Matias Zabaljauregui <zabaljauregui at gmail.com> --- Documentation/lguest/lguest.txt | 1 - arch/x86/include/asm/lguest.h | 7 +- arch/x86/include/asm/lguest_hcall.h | 3 +- arch/x86/lguest/Kconfig

Hi, this version requires that host and guest have the same PAE status. NX cap is not offered to the guest, yet. Thanks, Matias Lguest PAE support Signed-off-by: Matias Zabaljauregui <zabaljauregui at gmail.com> --- Documentation/lguest/lguest.txt | 1 - arch/x86/include/asm/lguest.h | 7 +- arch/x86/include/asm/lguest_hcall.h | 3 +- arch/x86/lguest/Kconfig

We still assume the Guest and Host have the same PAGE_OFFSET settings, but now we don't assume 0xC0000000. Signed-off-by: Rusty Russell <rusty at rustcorp.com.au> Cc: Matias Zabaljauregui <zabaljauregui at gmail.com> --- drivers/lguest/page_tables.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/lguest/page_tables.c

We still assume the Guest and Host have the same PAGE_OFFSET settings, but now we don't assume 0xC0000000. Signed-off-by: Rusty Russell <rusty at rustcorp.com.au> Cc: Matias Zabaljauregui <zabaljauregui at gmail.com> --- drivers/lguest/page_tables.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/lguest/page_tables.c

Impact: potential bugfix In theory, the kernel could reuse the same page as pgdir for a new process while the hypervisor keeps it cached. This would have undesirable results. Signed-off-by: Rusty Russell <rusty at rustcorp.com.au> --- arch/x86/include/asm/lguest_hcall.h | 1 + arch/x86/lguest/boot.c | 8 ++++++++ drivers/lguest/hypercalls.c | 3 +++

Impact: potential bugfix In theory, the kernel could reuse the same page as pgdir for a new process while the hypervisor keeps it cached. This would have undesirable results. Signed-off-by: Rusty Russell <rusty at rustcorp.com.au> --- arch/x86/include/asm/lguest_hcall.h | 1 + arch/x86/lguest/boot.c | 8 ++++++++ drivers/lguest/hypercalls.c | 3 +++

Kernel pages on x86 are protected by not having the _PAGE_USER bit set. When guest userspace accesses a kernel page, we didn't check this, so we'd think we'd handled the fault and return to the guest, causing the guest userspace program to loop instead of segfaulting. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> --- drivers/lguest/core.c | 2 +-

Lguest drivers need to default to "Y" otherwise they're never selected for new builds. (We don't bother prompting, because they're less than 4k combined, and implied by selecting lguest support). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> --- drivers/lguest/Kconfig | 2 ++ 1 file changed, 2 insertions(+)

Lguest drivers need to default to "Y" otherwise they're never selected for new builds. (We don't bother prompting, because they're less than 4k combined, and implied by selecting lguest support). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> --- drivers/lguest/Kconfig | 2 ++ 1 file changed, 2 insertions(+)

Kernel pages on x86 are protected by not having the _PAGE_USER bit set. When guest userspace accesses a kernel page, we didn't check this, so we'd think we'd handled the fault and return to the guest, causing the guest userspace program to loop instead of segfaulting. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> --- drivers/lguest/core.c | 2 +-

We don't actually need the Guest handlers mapped to avoid double fault, just the stack pages. Thanks to Zach for confirming. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> --- drivers/lguest/interrupts_and_traps.c | 26 +------------------------- drivers/lguest/lg.h | 2 +- drivers/lguest/page_tables.c | 6 +++--- 3 files changed, 5