kernel/git/stable/linux.git/drivers/lguest/lg.h, branch master

x86/lguest: Remove lguest support

2017-08-24T07:57:28+00:00

Lguest seems to be rather unused these days. It has seen only patches ensuring it still builds the last two years and its official state is "Odd Fixes". Remove it in order to be able to clean up the paravirt code. Signed-off-by: Juergen Gross Acked-by: Rusty Russell Acked-by: Thomas Gleixner Cc: Linus Torvalds Cc: Peter Zijlstra Cc: boris.ostrovsky@oracle.com Cc: lguest@lists.ozlabs.org Cc: rusty@rustcorp.com.au Cc: xen-devel@lists.xenproject.org Link: http://lkml.kernel.org/r/20170816173157.8633-3-jgross@suse.com Signed-off-by: Ingo Molnar

x86/fpu, lguest: Remove CR0.TS support

2016-11-01T06:47:54+00:00

Now that Linux never sets CR0.TS, lguest doesn't need to support it. Signed-off-by: Andy Lutomirski Cc: Borislav Petkov Cc: Brian Gerst Cc: Dave Hansen Cc: Denys Vlasenko Cc: Fenghua Yu Cc: H. Peter Anvin Cc: Josh Poimboeuf Cc: Linus Torvalds Cc: Oleg Nesterov Cc: Paolo Bonzini Cc: Peter Zijlstra Cc: Quentin Casasnovas Cc: Rik van Riel Cc: Rusty Russell Cc: Thomas Gleixner Cc: kvm list Link: http://lkml.kernel.org/r/8a7bf2c11231c082258fd67705d0f275639b8475.1477951965.git.luto@kernel.org Signed-off-by: Ingo Molnar

lguest, x86/entry/32: Fix handling of guest syscalls using interrupt gates

2016-04-01T06:58:13+00:00

In a798f091113e ("x86/entry/32: Change INT80 to be an interrupt gate") Andy broke lguest. This is because lguest had special code to allow the 0x80 trap gate go straight into the guest itself; interrupts gates (without more work, as mentioned in the file's comments) bounce via the hypervisor. His change made them go via the hypervisor, but as it's in the range of normal hardware interrupts, they were not directed through to the guest at all. Turns out the guest userspace isn't very effective if syscalls are all noops. I haven't ripped out all the now-useless trap-direct-to-guest-kernel code yet, since it will still be needed if someone decides to update this optimization. Signed-off-by: Rusty Russell Cc: Andy Lutomirski Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Brian Gerst Cc: Denys Vlasenko Cc: H. Peter Anvin Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Weisbecker Cc: x86\@kernel.org Link: http://lkml.kernel.org/r/87fuv685kl.fsf@rustcorp.com.au Signed-off-by: Ingo Molnar

lguest: suppress interrupts for single insn, not range.

2015-03-24T01:22:08+00:00

The last patch reduced our interrupt-suppression region to one address, so simplify the code somewhat. Also, remove the obsolete undefined instruction ranges and the comment which refers to lguest_guest.S instead of head_32.S. Signed-off-by: Rusty Russell

lguest: remove NOTIFY call and eventfd facility.

2015-02-11T06:17:46+00:00

Disappointing, as this was kind of neat (especially getting to use RCU to manage the address -> eventfd mapping). But now the devices are PCI handled in userspace, we get rid of both the NOTIFY hypercall and the interface to connect an eventfd. Signed-off-by: Rusty Russell

lguest: add iomem region, where guest page faults get sent to userspace.

2015-02-11T06:17:33+00:00

This lets us implement PCI. Signed-off-by: Rusty Russell

lguest: add infrastructure to check mappings.

2015-02-11T06:17:31+00:00

We normally abort the guest unconditionally when it gives us a bad address, but in the next patch we want to copy some bytes which may not be mapped. Signed-off-by: Rusty Russell

lguest: write more information to userspace about pending traps.

2015-02-11T06:17:30+00:00

This is preparation for userspace handling MMIO and ioport accesses. Signed-off-by: Rusty Russell

lguest: add operations to get/set a register from the Launcher.

2015-02-11T06:17:29+00:00

We use the ptrace API struct, and we currently don't let them set anything but the normal registers (we'd have to filter the others). Signed-off-by: Rusty Russell

lguest: cache last cpu we ran on.

2013-04-22T06:15:03+00:00

This optimizes the frobbing of our Switcher map. Signed-off-by: Rusty Russell