Commit Graph

8 Commits

Author SHA1 Message Date
Hollis Blanchard
9dcb40e1aa KVM: ppc: Report bad GFNs
This code shouldn't be hit anyways, but when it is, it's useful to have a
little more information about the failure.

Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-06-06 21:22:41 +03:00
Hollis Blanchard
905fa4b9d6 KVM: ppc: Use a read lock around MMU operations, and release it on error
gfn_to_page() and kvm_release_page_clean() are called from other contexts with
mmap_sem locked only for reading.

Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-06-06 21:22:33 +03:00
Hollis Blanchard
52435b7c7a KVM: ppc: Remove unmatched kunmap() call
We're not calling kmap() now, so we shouldn't call kunmap() either. This has no
practical effect in the non-highmem case, which is why it hasn't caused more
obvious problems.

Pointed out by Anthony Liguori.

Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-06-06 21:22:25 +03:00
Hollis Blanchard
ac3cd34e4e KVM: ppc: add lwzx/stwz emulation
Somehow these load/store instructions got missed before, but weren't used by
the guest so didn't break anything.

Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-06-06 21:22:17 +03:00
Hollis Blanchard
ce263d70e5 KVM: ppc: Remove duplicate function
This was left behind from some code movement.

Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-06-06 21:22:09 +03:00
Christian Ehrhardt
de368dceb3 KVM: ppc: deliver INTERRUPT_FP_UNAVAIL to the guest
This patch adds the delivery of INTERRUPT_FP_UNAVAIL exceptions to the guest.
It's needed if a guest uses ppc binaries using the Floating point instructions.

Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
Acked-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-05-04 14:44:45 +03:00
Hollis Blanchard
45c5eb67da KVM: ppc: Handle guest idle by emulating MSR[WE] writes
This reduces host CPU usage when the guest is idle. However, the guest must
set MSR[WE] in its idle loop, which Linux did not do until 2.6.26.

Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Jerone Young <jyoung5@us.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-05-04 14:44:44 +03:00
Hollis Blanchard
bbf45ba57e KVM: ppc: PowerPC 440 KVM implementation
This functionality is definitely experimental, but is capable of running
unmodified PowerPC 440 Linux kernels as guests on a PowerPC 440 host. (Only
tested with 440EP "Bamboo" guests so far, but with appropriate userspace
support other SoC/board combinations should work.)

See Documentation/powerpc/kvm_440.txt for technical details.

[stephen: build fix]

Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Acked-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27 18:21:39 +03:00