linux-toradex.git/drivers/kvm, branch v2.6.21-rc1

[PATCH] i386: Convert i386 PDA code to use %fs

2007-02-13T12:26:20+00:00

Convert the PDA code to use %fs rather than %gs as the segment for
per-processor data.  This is because some processors show a small but
measurable performance gain for reloading a NULL segment selector (as %fs
generally is in user-space) versus a non-NULL one (as %gs generally is).

On modern processors the difference is very small, perhaps undetectable.
Some old AMD "K6 3D+" processors are noticably slower when %fs is used
rather than %gs; I have no idea why this might be, but I think they're
sufficiently rare that it doesn't matter much.

This patch also fixes the math emulator, which had not been adjusted to
match the changed struct pt_regs.

[frederik.deweerdt@gmail.com: fixit with gdb]
[mingo@elte.hu: Fix KVM too]

Signed-off-by: Jeremy Fitzhardinge 
Signed-off-by: Andi Kleen 
Cc: Ian Campbell 
Acked-by: Ingo Molnar 
Acked-by: Zachary Amsden 
Cc: Eric Dumazet 
Signed-off-by: Frederik Deweerdt 
Signed-off-by: Andrew Morton

[PATCH] KVM: Host suspend/resume support

2007-02-12T17:48:41+00:00

Add the necessary callbacks to suspend and resume a host running kvm.  This is
just a repeat of the cpu hotplug/unplug work.

Signed-off-by: Avi Kivity 
Cc: Ingo Molnar 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] KVM: cpu hotplug support

2007-02-12T17:48:41+00:00

On hotplug, we execute the hardware extension enable sequence.  On unplug, we
decache any vcpus that last ran on the exiting cpu, and execute the hardware
extension disable sequence.

Signed-off-by: Avi Kivity 
Cc: Ingo Molnar 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] KVM: VMX: add vcpu_clear()

2007-02-12T17:48:41+00:00

Like the inline code it replaces, this function decaches the vmcs from the cpu
it last executed on.  in addition:

 - vcpu_clear() works if the last cpu is also the cpu we're running on
 - it is faster on larger smps by virtue of using smp_call_function_single()

Includes fix from Ingo Molnar.

Signed-off-by: Ingo Molnar 
Signed-off-by: Avi Kivity 
Cc: Ingo Molnar 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] KVM: Add a global list of all virtual machines

2007-02-12T17:48:40+00:00

This will allow us to iterate over all vcpus and see which cpus they are
running on.

[akpm@osdl.org: use standard (ugly) initialisers]
Signed-off-by: Avi Kivity 
Cc: Ingo Molnar 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] kvm: fix vcpu freeing bug

2007-02-12T17:48:40+00:00

vcpu_load() can return NULL and it sometimes does in failure paths (for
example when the userspace ABI version is too old) - causing a preemption
count underflow in the ->vcpu_free() later on.  So check for NULL.

Signed-off-by: Ingo Molnar 
Signed-off-by: Avi Kivity 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] kvm: VMX: Reload ds and es even in 64-bit mode

2007-02-12T17:48:40+00:00

Or 32-bit userspace will get confused.

Signed-off-by: Avi Kivity 
Cc: Ingo Molnar 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] kvm: Two-way apic tpr synchronization

2007-02-12T17:48:40+00:00

We report the value of cr8 to userspace on an exit.  Also let userspace change
cr8 when we re-enter the guest.  The lets 64-bit guest code maintain the tpr
correctly.

Thanks for Yaniv Kamay for the idea.

Signed-off-by: Dor Laor 
Signed-off-by: Avi Kivity 
Cc: Ingo Molnar 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] kvm: SVM: Hack initial cpu csbase to be consistent with intel

2007-02-12T17:48:40+00:00

This allows us to run the mmu testsuite on amd.

Signed-off-by: Avi Kivity 
Cc: Ingo Molnar 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] kvm: Fix mmu going crazy of guest sets cr0.wp == 0

2007-02-12T17:48:40+00:00

The kvm mmu relies on cr0.wp being set even if the guest does not set it.  The
vmx code correctly forces cr0.wp at all times, the svm code does not, so it
can't boot solaris without this patch.

Signed-off-by: Avi Kivity 
Cc: Ingo Molnar 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds