summaryrefslogtreecommitdiffstats
path: root/arch/powerpc/kvm
Commit message (Collapse)AuthorAgeFilesLines
* powerpc: Fix KVM build on ppc440Paul Mackerras2008-12-231-0/+1
| | | | | | | | | | Commit 2a4aca1144394653269720ffbb5a325a77abd5fa ("powerpc/mm: Split low level tlb invalidate for nohash processors") changed a call to _tlbia to _tlbil_all but didn't include the header that defines _tlbil_all, leading to a build failure on 440 if KVM is enabled. This fixes it. Signed-off-by: Paul Mackerras <paulus@samba.org>
* powerpc/mm: Split low level tlb invalidate for nohash processorsBenjamin Herrenschmidt2008-12-211-1/+1
| | | | | | | | | | | | | | | | | | | | | | | Currently, the various forms of low level TLB invalidations are all implemented in misc_32.S for 32-bit processors, in a fairly scary mess of #ifdef's and with interesting duplication such as a whole bunch of code for FSL _tlbie and _tlbia which are no longer used. This moves things around such that _tlbie is now defined in hash_low_32.S and is only used by the 32-bit hash code, and all nohash CPUs use the various _tlbil_* forms that are now moved to a new file, tlb_nohash_low.S. I moved all the definitions for that stuff out of include/asm/tlbflush.h as they are really internal mm stuff, into mm/mmu_decl.h The code should have no functional changes. I kept some variants inline for trivial forms on things like 40x and 8xx. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* KVM: ppc: stop leaking host memory on VM exitHollis Blanchard2008-11-252-0/+9
| | | | | | | | | | | | When the VM exits, we must call put_page() for every page referenced in the shadow TLB. Without this patch, we usually leak 30-50 host pages (120 - 200 KiB with 4 KiB pages). The maximum number of pages leaked is the size of our shadow TLB, 64 pages. Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: switch to get_user_pages_fastMarcelo Tosatti2008-10-151-2/+0
| | | | | | | | | Convert gfn_to_pfn to use get_user_pages_fast, which can do lockless pagetable lookups on x86. Kernel compilation on 4-way guest is 3.7% faster on VMX. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: ppc: kvmppc_44x_shadow_release() does not require mmap_sem to be lockedHollis Blanchard2008-10-151-7/+1
| | | | | | | And it gets in the way of get_user_pages_fast(). Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: powerpc: Map guest userspace with TID=0 mappingsHollis Blanchard2008-10-154-18/+27
| | | | | | | | | | | | | | When we use TID=N userspace mappings, we must ensure that kernel mappings have been destroyed when entering userspace. Using TID=1/TID=0 for kernel/user mappings and running userspace with PID=0 means that userspace can't access the kernel mappings, but the kernel can directly access userspace. The net is that we don't need to flush the TLB on privilege switches, but we do on guest context switches (which are far more infrequent). Guest boot time performance improvement: about 30%. Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: ppc: Write only modified shadow entries into the TLB on exitHollis Blanchard2008-10-153-18/+57
| | | | | | | | | | | Track which TLB entries need to be written, instead of overwriting everything below the high water mark. Typically only a single guest TLB entry will be modified in a single exit. Guest boot time performance improvement: about 15%. Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: ppc: Stop saving host TLB stateHollis Blanchard2008-10-151-14/+3
| | | | | | | | | | | | | We're saving the host TLB state to memory on every exit, but never using it. Originally I had thought that we'd want to restore host TLB for heavyweight exits, but that could actually hurt when context switching to an unrelated host process (i.e. not qemu). Since this decreases the performance penalty of all exits, this patch improves guest boot time by about 15%. Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: ppc: guest breakpoint supportHollis Blanchard2008-10-153-2/+108
| | | | | | | | | Allow host userspace to program hardware debug registers to set breakpoints inside guests. Signed-off-by: Jerone Young <jyoung5@us.ibm.com> Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: ppc: trace powerpc instruction emulationChristian Ehrhardt2008-10-151-0/+2
| | | | | | | | This patch adds a trace point for the instruction emulation on embedded powerpc utilizing the KVM_TRACE interface. Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: ppc: adds trace points for ppc tlb activityJerone Young2008-10-152-1/+18
| | | | | | | | | This patch adds trace points to track powerpc TLB activities using the KVM_TRACE infrastructure. Signed-off-by: Jerone Young <jyoung5@us.ibm.com> Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: ppc: enable KVM_TRACE building for powerpcJerone Young2008-10-152-2/+15
| | | | | | | | | This patch enables KVM_TRACE to build for PowerPC arch. This means just adding sections to Kconfig and Makefile. Signed-off-by: Jerone Young <jyoung5@us.ibm.com> Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: ppc: fix invalidation of large guest pagesHollis Blanchard2008-07-272-3/+4
| | | | | | | | | | When guest invalidates a large tlb map, there may be more than one corresponding shadow tlb maps that need to be invalidated. Use eaddr and eend to find these shadow tlb maps. Signed-off-by: Liu Yu <yu.liu@freescale.com> Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: MMU: nuke shadowed pgtable pages and ptes on memslot destructionMarcelo Tosatti2008-07-201-0/+4
| | | | | | | Flush the shadow mmu before removing regions to avoid stale entries. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: Add coalesced MMIO support (powerpc part)Laurent Vivier2008-07-202-1/+4
| | | | | | | | | This patch enables coalesced MMIO for powerpc architecture. It defines KVM_MMIO_PAGE_OFFSET and KVM_CAP_COALESCED_MMIO. It enables the compilation of coalesced_mmio.c. Signed-off-by: Laurent Vivier <Laurent.Vivier@bull.net> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: Remove decache_vcpus_on_cpu() and related callbacksAvi Kivity2008-07-201-4/+0
| | | | | | Obsoleted by the vmx-specific per-cpu list. Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: ppc: Report bad GFNsHollis Blanchard2008-06-061-1/+1
| | | | | | | | 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>
* KVM: ppc: Use a read lock around MMU operations, and release it on errorHollis Blanchard2008-06-061-2/+3
| | | | | | | | 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>
* KVM: ppc: Remove unmatched kunmap() callHollis Blanchard2008-06-061-2/+0
| | | | | | | | | | | 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>
* KVM: ppc: add lwzx/stwz emulationHollis Blanchard2008-06-061-0/+12
| | | | | | | | | 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>
* KVM: ppc: Remove duplicate functionHollis Blanchard2008-06-061-33/+0
| | | | | | | 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>
* KVM: ppc: deliver INTERRUPT_FP_UNAVAIL to the guestChristian Ehrhardt2008-05-041-0/+5
| | | | | | | | | 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>
* KVM: ppc: Handle guest idle by emulating MSR[WE] writesHollis Blanchard2008-05-042-3/+18
| | | | | | | | | 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>
* KVM: ppc: PowerPC 440 KVM implementationHollis Blanchard2008-04-279-0/+2702
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>
OpenPOWER on IntegriCloud