user/sven/linux.git/drivers/lguest, branch v3.2.78

lguest: fix out-by-one error in address checking.

2015-08-06T23:32:13Z

commit 83a35114d0e4583e6b0ca39502e68b6a92e2910c upstream. This bug has been there since day 1; addresses in the top guest physical page weren't considered valid. You could map that page (the check in check_gpte() is correct), but if a guest tried to put a pagetable there we'd check that address manually when walking it, and kill the guest. Signed-off-by: Rusty Russell Signed-off-by: Linus Torvalds Signed-off-by: Ben Hutchings

lguest: add export.h to lguest files for THIS_MODULE/EXPORT_SYMBOL

2011-10-31T23:32:13Z

We need this in advance of the module.h cleanup, or we'll get compile errors like this: CC drivers/lguest/lguest_device.o drivers/lguest/lguest_device.c: In function ‘lguest_devices_init’: drivers/lguest/lguest_device.c:490: error: ‘THIS_MODULE’ undeclared (first use in this function) Signed-off-by: Paul Gortmaker

lguest: move process freezing before pending signals check

2011-10-27T00:26:18Z

run_guest tries to freeze the current process after it has handled pending interrupts and before it calls lguest_arch_run_guest. This doesn't work nicely if the task has been killed while being frozen and when we want to handle that signal as soon as possible. Let's move try_to_freeze before we check for pending signal so that we can get out of the loop as soon as possible. Signed-off-by: Michal Hocko Acked-by: Rusty Russell Signed-off-by: Rusty Russell

lguest: Allow running under paravirt-enabled KVM.

2011-10-27T00:26:17Z

We actually can run under KVM, as it doesn't paravirtualize anything we need to use; reduce the check to checking we are the normal ringlevel. Reported-by: Stefanos Geraggelos Signed-off-by: Rusty Russell # HG changeset patch

lguest: Fix in/out emulation

2011-07-22T05:09:51Z

We were blatting too much of the register. Linux didn't care, but in theory it might. Reported-by: Jonas Maebe Signed-off-by: Rusty Russell

lguest: update comments

2011-07-22T05:09:50Z

Also removes a long-unused #define and an extraneous semicolon. Signed-off-by: Rusty Russell

lguest: Simplify device initialization.

2011-07-22T05:09:49Z

We used to notify the Host every time we updated a device's status. However, it only really needs to know when we're resetting the device, or failed to initialize it, or when we've finished our feature negotiation. In particular, we used to wait for VIRTIO_CONFIG_S_DRIVER_OK in the status byte before starting the device service threads. But this corresponds to the successful finish of device initialization, which might (like virtio_blk's partition scanning) use the device. So we had a hack, if they used the device before we expected we started the threads anyway. Now we hook into the finalize_features hook in the Guest: at that point we tell the Launcher that it can rely on the features we have acked. On the Launcher side, we look at the status at that point, and start servicing the device. Signed-off-by: Rusty Russell

lguest: don't rewrite vmcall instructions

2011-07-22T05:09:49Z

Now we no longer use vmcall, we don't need to rewrite it in the Guest. Signed-off-by: Rusty Russell

lguest: use a special 1:1 linear pagetable mode until first switch.

2011-07-22T05:09:48Z

The Host used to create some page tables for the Guest to use at the top of Guest memory; it would then tell the Guest where this was. In particular, it created linear mappings for 0 and 0xC0000000 addresses because lguest used to switch to its real page tables quite late in boot. However, since d50d8fe19 Linux initialized boot page tables in head_32.S even before the "are we lguest?" boot jump. So, now we can simplify things: the Host pagetable code assumes 1:1 linear mapping until it first calls the LHCALL_NEW_PGTABLE hypercall, which we now do before we reach C code. This also means that the Host doesn't need to know anything about the Guest's PAGE_OFFSET. (Non-Linux guests might not even have such a thing). Signed-off-by: Rusty Russell

Correct occurrences of

2011-05-06T16:27:55Z

- Documentation/kvm/ to Documentation/virtual/kvm - Documentation/uml/ to Documentation/virtual/uml - Documentation/lguest/ to Documentation/virtual/lguest throughout the kernel source tree. Signed-off-by: Rob Landley Signed-off-by: Randy Dunlap