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* KVM: Remove memory alias supportAvi Kivity2010-08-0113-225/+11
| | | | | | | As advertised in feature-removal-schedule.txt. Equivalent support is provided by overlapping memory regions. Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: s390: Don't exit SIE on SIGP sense runningChristian Borntraeger2010-08-012-2/+4
| | | | | | | | | | Newer (guest) kernels use sigp sense running in their spinlock implementation to check if the other cpu is running before yielding the processor. This revealed some wrong guest settings, causing unnecessary exits for every sigp sense running. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: s390: Fix build failure due to centralized vcpu locking patchesChristian Borntraeger2010-08-013-3/+3
| | | | | | | | | | | | | | | This patch fixes ERROR: "__kvm_s390_vcpu_store_status" [arch/s390/kvm/kvm.ko] undefined! triggered by commit 3268c56840dcee78c3e928336550f4e1861504c4 (kvm.git) Author: Avi Kivity <avi@redhat.com> Date: Thu May 13 12:21:46 2010 +0300 KVM: s390: Centrally lock arch specific vcpu ioctls Reported-by: Sachin Sant <sachinp@in.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: Consolidate load/save temporary buffer allocation and freeingAvi Kivity2010-08-011-30/+32
| | | | | | | Instead of three temporary variables and three free calls, have one temporary variable (with four names) and one free call. Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: Fix xsave and xcr save/restore memory leakAvi Kivity2010-08-011-8/+4
| | | | | | We allocate temporary kernel buffers for these structures, but never free them. Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: x86 emulator: fix group3 instruction decodingWei Yongjun2010-08-011-2/+2
| | | | | | | | | | | | | | | | | | | Group 3 instruction with ModRM reg field as 001 is defined as test instruction under AMD arch, and emulate_grp3() is ready for emulate it, so fix the decoding. static inline int emulate_grp3(...) { ... switch (c->modrm_reg) { case 0 ... 1: /* test */ emulate_2op_SrcV("test", c->src, c->dst, ctxt->eflags); ... } Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: PPC: fix uninitialized variable warning in kvm_ppc_core_deliver_interruptsAsias He2010-08-011-1/+1
| | | | | | | | | Fixes: arch/powerpc/kvm/booke.c: In function 'kvmppc_core_deliver_interrupts': arch/powerpc/kvm/booke.c:147: warning: 'msr_mask' may be used uninitialized in this function Signed-off-by: Asias He <asias.hejun@gmail.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: Fix typos in Documentation/kvm/mmu.txtJason Wang2010-08-011-2/+2
| | | | | Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: x86: In DM_LOWEST, only deliver interrupts to vcpus with enabled LAPIC'sChris Lalancette2010-08-011-1/+1
| | | | | | | | Otherwise we might try to deliver a timer interrupt to a cpu that can't possibly handle it. Signed-off-by: Chris Lalancette <clalance@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: x86: Allow any LAPIC to accept PIC interruptsChris Lalancette2010-08-011-7/+5
| | | | | | | | If the guest wants to accept timer interrupts on a CPU other than the BSP, we need to remove this gate. Signed-off-by: Chris Lalancette <clalance@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: x86: Introduce a workqueue to deliver PIT timer interruptsChris Lalancette2010-08-013-58/+88
| | | | | | | | | | We really want to "kvm_set_irq" during the hrtimer callback, but that is risky because that is during interrupt context. Instead, offload the work to a workqueue, which is a bit safer and should provide most of the same functionality. Signed-off-by: Chris Lalancette <clalance@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: x86 emulator: fix pusha instruction emulationWei Yongjun2010-08-011-60/+73
| | | | | | | | | emulate pusha instruction only writeback the last EDI register, but the other registers which need to be writeback is ignored. This patch fixed it. Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: x86: fix -DDEBUG oopsZachary Amsden2010-08-011-1/+1
| | | | | | | Fix a slight error with assertion in local APIC code. Signed-off-by: Zachary Amsden <zamsden@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: MMU: don't walk every parent pages while mark unsyncXiao Guangrong2010-08-011-44/+17
| | | | | | | | | While we mark the parent's unsync_child_bitmap, if the parent is already unsynced, it no need walk it's parent, it can reduce some unnecessary workload Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: MMU: clear unsync_child_bitmap completelyXiao Guangrong2010-08-011-24/+29
| | | | | | | | | | | | In current code, some page's unsync_child_bitmap is not cleared completely in mmu_sync_children(), for example, if two PDPEs shard one PDT, one of PDPE's unsync_child_bitmap is not cleared. Currently, it not harm anything just little overload, but it's the prepare work for the later patch Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: MMU: cleanup for __mmu_unsync_walk()Xiao Guangrong2010-08-011-4/+4
| | | | | | | Decrease sp->unsync_children after clear unsync_child_bitmap bit Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: MMU: don't mark pte notrap if it's just sync transientXiao Guangrong2010-08-013-10/+8
| | | | | | | If the sync-sp just sync transient, don't mark its pte notrap Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: MMU: avoid double write protected in sync page pathXiao Guangrong2010-08-011-4/+2
| | | | | | | | The sync page is already write protected in mmu_sync_children(), don't write protected it again Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: MMU: cleanup for dirty page judgmentXiao Guangrong2010-08-011-2/+2
| | | | | | | Using wrap function to cleanup page dirty judgment Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: MMU: rename 'page' and 'shadow_page' to 'sp'Xiao Guangrong2010-08-011-11/+11
| | | | | | | Rename 'page' and 'shadow_page' to 'sp' to better fit the context Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: x86: XSAVE/XRSTOR live migration supportSheng Yang2010-08-015-2/+252
| | | | | | | This patch enable save/restore of xsave state. Signed-off-by: Sheng Yang <sheng@linux.intel.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: PPC: fix build warning in kvm_arch_vcpu_ioctl_runDenis Kirjanov2010-08-011-1/+1
| | | | | | | | | | | Fix compile warning: CC [M] arch/powerpc/kvm/powerpc.o arch/powerpc/kvm/powerpc.c: In function 'kvm_arch_vcpu_ioctl_run': arch/powerpc/kvm/powerpc.c:290: warning: 'gpr' may be used uninitialized in this function arch/powerpc/kvm/powerpc.c:290: note: 'gpr' was declared here Signed-off-by: Denis Kirjanov <dkirjanov@kernel.org> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: Fix mov cr3 #GP at wrong instructionAvi Kivity2010-08-015-14/+8
| | | | | | | | | | | On Intel, we call skip_emulated_instruction() even if we injected a #GP, resulting in the #GP pointing at the wrong address. Fix by injecting the exception and skipping the instruction at the same place, so we can do just one or the other. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: Fix mov cr4 #GP at wrong instructionAvi Kivity2010-08-013-11/+5
| | | | | | | | | | | On Intel, we call skip_emulated_instruction() even if we injected a #GP, resulting in the #GP pointing at the wrong address. Fix by injecting the exception and skipping the instruction at the same place, so we can do just one or the other. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: Fix mov cr0 #GP at wrong instructionAvi Kivity2010-08-014-13/+16
| | | | | | | | | | | On Intel, we call skip_emulated_instruction() even if we injected a #GP, resulting in the #GP pointing at the wrong address. Fix by injecting the exception and skipping the instruction at the same place, so we can do just one or the other. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: VMX: Enable XSAVE/XRSTOR for guestDexuan Cui2010-08-016-8/+146
| | | | | | | | | | | | | This patch enable guest to use XSAVE/XRSTOR instructions. We assume that host_xcr0 would use all possible bits that OS supported. And we loaded xcr0 in the same way we handled fpu - do it as late as we can. Signed-off-by: Dexuan Cui <dexuan.cui@intel.com> Signed-off-by: Sheng Yang <sheng@linux.intel.com> Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: VMX: Fix incorrect rcu deref in rmode_tss_base()Avi Kivity2010-08-011-1/+1
| | | | Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: Fix unused but set warningsAndi Kleen2010-08-012-2/+1
| | | | | | | No real bugs in this one. Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: Fix KVM_SET_SIGNAL_MASK with arg == NULLAndi Kleen2010-08-011-1/+1
| | | | | | | | | | When the user passed in a NULL mask pass this on from the ioctl handler. Found by gcc 4.6's new warnings. Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: MMU: delay local tlb flushXiao Guangrong2010-08-011-1/+1
| | | | | | | | | delay local tlb flush until enter guest moden, it can reduce vpid flush frequency and reduce remote tlb flush IPI(if KVM_REQ_TLB_FLUSH bit is already set, IPI is not sent) Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: MMU: use wrapper function to flush local tlbXiao Guangrong2010-08-011-1/+1
| | | | | | | | Use kvm_mmu_flush_tlb() function instead of calling kvm_x86_ops->tlb_flush(vcpu) directly. Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: MMU: remove unnecessary remote tlb flushXiao Guangrong2010-08-011-2/+0
| | | | | | | | This remote tlb flush is no necessary since we have synced while sp is zapped Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: VMX: fix rcu usage warning in init_rmode()Xiao Guangrong2010-08-011-6/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | fix: [ INFO: suspicious rcu_dereference_check() usage. ] --------------------------------------------------- include/linux/kvm_host.h:258 invoked rcu_dereference_check() without protection! other info that might help us debug this: rcu_scheduler_active = 1, debug_locks = 1 1 lock held by qemu-system-x86/3796: #0: (&vcpu->mutex){+.+.+.}, at: [<ffffffffa0217fd8>] vcpu_load+0x1a/0x66 [kvm] stack backtrace: Pid: 3796, comm: qemu-system-x86 Not tainted 2.6.34 #25 Call Trace: [<ffffffff81070ed1>] lockdep_rcu_dereference+0x9d/0xa5 [<ffffffffa0214fdf>] gfn_to_memslot_unaliased+0x65/0xa0 [kvm] [<ffffffffa0216139>] gfn_to_hva+0x22/0x4c [kvm] [<ffffffffa0216217>] kvm_write_guest_page+0x2a/0x7f [kvm] [<ffffffffa0216286>] kvm_clear_guest_page+0x1a/0x1c [kvm] [<ffffffffa0278239>] init_rmode+0x3b/0x180 [kvm_intel] [<ffffffffa02786ce>] vmx_set_cr0+0x350/0x4d3 [kvm_intel] [<ffffffffa02274ff>] kvm_arch_vcpu_ioctl_set_sregs+0x122/0x31a [kvm] [<ffffffffa021859c>] kvm_vcpu_ioctl+0x578/0xa3d [kvm] [<ffffffff8106624c>] ? cpu_clock+0x2d/0x40 [<ffffffff810f7d86>] ? fget_light+0x244/0x28e [<ffffffff810709b9>] ? trace_hardirqs_off_caller+0x1f/0x10e [<ffffffff8110501b>] vfs_ioctl+0x32/0xa6 [<ffffffff81105597>] do_vfs_ioctl+0x47f/0x4b8 [<ffffffff813ae654>] ? sub_preempt_count+0xa3/0xb7 [<ffffffff810f7da8>] ? fget_light+0x266/0x28e [<ffffffff810f7c53>] ? fget_light+0x111/0x28e [<ffffffff81105617>] sys_ioctl+0x47/0x6a [<ffffffff81002c1b>] system_call_fastpath+0x16/0x1b Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: VMX: rename vpid_sync_vcpu_all() to vpid_sync_vcpu_single()Gui Jianfeng2010-08-011-2/+2
| | | | | | | | The name "pid_sync_vcpu_all" isn't appropriate since it just affect a single vpid, so rename it to vpid_sync_vcpu_single(). Signed-off-by: Gui Jianfeng <guijianfeng@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: VMX: Add all-context INVVPID type supportGui Jianfeng2010-08-012-2/+22
| | | | | | | Add all-context INVVPID type support. Signed-off-by: Gui Jianfeng <guijianfeng@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: MMU: reduce remote tlb flush in kvm_mmu_pte_write()Xiao Guangrong2010-08-011-5/+15
| | | | | | | collect remote tlb flush in kvm_mmu_pte_write() path Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: MMU: traverse sp hlish safelyXiao Guangrong2010-08-011-28/+23
| | | | | | | Now, we can safely to traverse sp hlish Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: MMU: gather remote tlb flush which occurs during page zappedXiao Guangrong2010-08-011-31/+53
| | | | | | | | Using kvm_mmu_prepare_zap_page() and kvm_mmu_zap_page() instead of kvm_mmu_zap_page() that can reduce remote tlb flush IPI Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: MMU: don't get free page number in the loopXiao Guangrong2010-08-011-2/+5
| | | | | | | | | | | | | | | | | | | | In the later patch, we will modify sp's zapping way like below: kvm_mmu_prepare_zap_page A kvm_mmu_prepare_zap_page B kvm_mmu_prepare_zap_page C .... kvm_mmu_commit_zap_page [ zaped multiple sps only need to call kvm_mmu_commit_zap_page once ] In __kvm_mmu_free_some_pages() function, the free page number is getted form 'vcpu->kvm->arch.n_free_mmu_pages' in loop, it will hinders us to apply kvm_mmu_prepare_zap_page() and kvm_mmu_commit_zap_page() since kvm_mmu_prepare_zap_page() not free sp. Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: MMU: split the operations of kvm_mmu_zap_page()Xiao Guangrong2010-08-012-10/+44
| | | | | | | | | | | | | Using kvm_mmu_prepare_zap_page() and kvm_mmu_commit_zap_page() to split kvm_mmu_zap_page() function, then we can: - traverse hlist safely - easily to gather remote tlb flush which occurs during page zapped Those feature can be used in the later patches Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: MMU: introduce some macros to cleanup hlist traverseingXiao Guangrong2010-08-011-75/+47
| | | | | | | | Introduce for_each_gfn_sp() and for_each_gfn_indirect_valid_sp() to cleanup hlist traverseing Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: MMU: skip invalid sp when unprotect pageXiao Guangrong2010-08-011-1/+1
| | | | | | | In kvm_mmu_unprotect_page(), the invalid sp can be skipped Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: VMX: Make sure single type invvpid is supported before issuing invvpid ↵Gui Jianfeng2010-08-012-1/+9
| | | | | | | | | | | instruction According to SDM, we need check whether single-context INVVPID type is supported before issuing invvpid instruction. Signed-off-by: Gui Jianfeng <guijianfeng@cn.fujitsu.com> Reviewed-by: Sheng Yang <sheng@linux.intel.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: x86: use linux/uaccess.h instead of asm/uaccess.hLai Jiangshan2010-08-011-1/+1
| | | | | | | Should use linux/uaccess.h instead of asm/uaccess.h Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: cleanup "*new.rmap" typeLai Jiangshan2010-08-011-1/+1
| | | | | | | The type of '*new.rmap' is not 'struct page *', fix it Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: VMX: Enforce EPT pagetable level checkingSheng Yang2010-08-011-1/+7
| | | | | | | We only support 4 levels EPT pagetable now. Signed-off-by: Sheng Yang <sheng@linux.intel.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: Add Documentation/kvm/msr.txtGlauber Costa2010-08-011-0/+153
| | | | | | | | | This patch adds a file that documents the usage of KVM-specific MSRs. Signed-off-by: Glauber Costa <glommer@redhat.com> Reviewed-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: PPC: elide struct thread_struct instances from stackAndreas Schwab2010-08-015-95/+97
| | | | | | | | | Instead of instantiating a whole thread_struct on the stack use only the required parts of it. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Tested-by: Alexander Graf <agraf@suse.de> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: VMX: Properly return error to userspace on vmentry failureMohammed Gamal2010-08-011-0/+7
| | | | | | | | | The vmexit handler returns KVM_EXIT_UNKNOWN since there is no handler for vmentry failures. This intercepts vmentry failures and returns KVM_FAIL_ENTRY to userspace instead. Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: MMU: Don't calculate quadrant if tdp_enabledGui Jianfeng2010-08-011-1/+1
| | | | | | | There's no need to calculate quadrant if tdp is enabled. Signed-off-by: Gui Jianfeng <guijianfeng@cn.fujitsu.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
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