diff options
-rw-r--r-- | arch/powerpc/include/asm/kvm_host.h | 2 | ||||
-rw-r--r-- | arch/powerpc/kvm/book3s_64_mmu_hv.c | 47 | ||||
-rw-r--r-- | arch/powerpc/kvm/e500_tlb.c | 2 | ||||
-rw-r--r-- | arch/s390/kvm/Kconfig | 1 | ||||
-rw-r--r-- | arch/x86/include/asm/kvm_host.h | 3 | ||||
-rw-r--r-- | arch/x86/kvm/Kconfig | 1 | ||||
-rw-r--r-- | arch/x86/kvm/cpuid.c | 2 | ||||
-rw-r--r-- | arch/x86/kvm/emulate.c | 10 | ||||
-rw-r--r-- | arch/x86/kvm/irq.h | 2 | ||||
-rw-r--r-- | arch/x86/kvm/lapic.c | 4 | ||||
-rw-r--r-- | arch/x86/kvm/mmu.c | 117 | ||||
-rw-r--r-- | arch/x86/kvm/pmu.c | 2 | ||||
-rw-r--r-- | arch/x86/kvm/svm.c | 4 | ||||
-rw-r--r-- | arch/x86/kvm/vmx.c | 6 | ||||
-rw-r--r-- | arch/x86/kvm/x86.c | 26 | ||||
-rw-r--r-- | include/linux/kvm_host.h | 62 | ||||
-rw-r--r-- | virt/kvm/Kconfig | 3 | ||||
-rw-r--r-- | virt/kvm/iommu.c | 10 | ||||
-rw-r--r-- | virt/kvm/irq_comm.c | 4 | ||||
-rw-r--r-- | virt/kvm/kvm_main.c | 84 |
20 files changed, 277 insertions, 115 deletions
diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index 50ea12fd7bf5..572ad0141268 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -52,6 +52,8 @@ struct kvm; extern int kvm_unmap_hva(struct kvm *kvm, unsigned long hva); +extern int kvm_unmap_hva_range(struct kvm *kvm, + unsigned long start, unsigned long end); extern int kvm_age_hva(struct kvm *kvm, unsigned long hva); extern int kvm_test_age_hva(struct kvm *kvm, unsigned long hva); extern void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte); diff --git a/arch/powerpc/kvm/book3s_64_mmu_hv.c b/arch/powerpc/kvm/book3s_64_mmu_hv.c index d03eb6f7b058..3c635c0616b0 100644 --- a/arch/powerpc/kvm/book3s_64_mmu_hv.c +++ b/arch/powerpc/kvm/book3s_64_mmu_hv.c @@ -756,9 +756,12 @@ int kvmppc_book3s_hv_page_fault(struct kvm_run *run, struct kvm_vcpu *vcpu, goto out_put; } -static int kvm_handle_hva(struct kvm *kvm, unsigned long hva, - int (*handler)(struct kvm *kvm, unsigned long *rmapp, - unsigned long gfn)) +static int kvm_handle_hva_range(struct kvm *kvm, + unsigned long start, + unsigned long end, + int (*handler)(struct kvm *kvm, + unsigned long *rmapp, + unsigned long gfn)) { int ret; int retval = 0; @@ -767,15 +770,25 @@ static int kvm_handle_hva(struct kvm *kvm, unsigned long hva, slots = kvm_memslots(kvm); kvm_for_each_memslot(memslot, slots) { - unsigned long start = memslot->userspace_addr; - unsigned long end; + unsigned long hva_start, hva_end; + gfn_t gfn, gfn_end; - end = start + (memslot->npages << PAGE_SHIFT); - if (hva >= start && hva < end) { - gfn_t gfn_offset = (hva - start) >> PAGE_SHIFT; + hva_start = max(start, memslot->userspace_addr); + hva_end = min(end, memslot->userspace_addr + + (memslot->npages << PAGE_SHIFT)); + if (hva_start >= hva_end) + continue; + /* + * {gfn(page) | page intersects with [hva_start, hva_end)} = + * {gfn, gfn+1, ..., gfn_end-1}. + */ + gfn = hva_to_gfn_memslot(hva_start, memslot); + gfn_end = hva_to_gfn_memslot(hva_end + PAGE_SIZE - 1, memslot); + + for (; gfn < gfn_end; ++gfn) { + gfn_t gfn_offset = gfn - memslot->base_gfn; - ret = handler(kvm, &memslot->rmap[gfn_offset], - memslot->base_gfn + gfn_offset); + ret = handler(kvm, &memslot->rmap[gfn_offset], gfn); retval |= ret; } } @@ -783,6 +796,13 @@ static int kvm_handle_hva(struct kvm *kvm, unsigned long hva, return retval; } +static int kvm_handle_hva(struct kvm *kvm, unsigned long hva, + int (*handler)(struct kvm *kvm, unsigned long *rmapp, + unsigned long gfn)) +{ + return kvm_handle_hva_range(kvm, hva, hva + 1, handler); +} + static int kvm_unmap_rmapp(struct kvm *kvm, unsigned long *rmapp, unsigned long gfn) { @@ -850,6 +870,13 @@ int kvm_unmap_hva(struct kvm *kvm, unsigned long hva) return 0; } +int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end) +{ + if (kvm->arch.using_mmu_notifiers) + kvm_handle_hva_range(kvm, start, end, kvm_unmap_rmapp); + return 0; +} + static int kvm_age_rmapp(struct kvm *kvm, unsigned long *rmapp, unsigned long gfn) { diff --git a/arch/powerpc/kvm/e500_tlb.c b/arch/powerpc/kvm/e500_tlb.c index c510fc961302..c8f6c5826742 100644 --- a/arch/powerpc/kvm/e500_tlb.c +++ b/arch/powerpc/kvm/e500_tlb.c @@ -520,7 +520,7 @@ static inline void kvmppc_e500_shadow_map(struct kvmppc_vcpu_e500 *vcpu_e500, if (likely(!pfnmap)) { unsigned long tsize_pages = 1 << (tsize + 10 - PAGE_SHIFT); - pfn = gfn_to_pfn_memslot(vcpu_e500->vcpu.kvm, slot, gfn); + pfn = gfn_to_pfn_memslot(slot, gfn); if (is_error_pfn(pfn)) { printk(KERN_ERR "Couldn't get real page for gfn %lx!\n", (long)gfn); diff --git a/arch/s390/kvm/Kconfig b/arch/s390/kvm/Kconfig index 78eb9847008f..a6e2677724e1 100644 --- a/arch/s390/kvm/Kconfig +++ b/arch/s390/kvm/Kconfig @@ -21,6 +21,7 @@ config KVM depends on HAVE_KVM && EXPERIMENTAL select PREEMPT_NOTIFIERS select ANON_INODES + select HAVE_KVM_CPU_RELAX_INTERCEPT ---help--- Support hosting paravirtualized guest machines using the SIE virtualization capability on the mainframe. This should work diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 09155d64cf7e..48e713188469 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -500,11 +500,11 @@ struct kvm_vcpu_arch { }; struct kvm_lpage_info { - unsigned long rmap_pde; int write_count; }; struct kvm_arch_memory_slot { + unsigned long *rmap_pde[KVM_NR_PAGE_SIZES - 1]; struct kvm_lpage_info *lpage_info[KVM_NR_PAGE_SIZES - 1]; }; @@ -957,6 +957,7 @@ extern bool kvm_rebooting; #define KVM_ARCH_WANT_MMU_NOTIFIER int kvm_unmap_hva(struct kvm *kvm, unsigned long hva); +int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end); int kvm_age_hva(struct kvm *kvm, unsigned long hva); int kvm_test_age_hva(struct kvm *kvm, unsigned long hva); void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte); diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig index a28f338843ea..45c044f0fff7 100644 --- a/arch/x86/kvm/Kconfig +++ b/arch/x86/kvm/Kconfig @@ -37,6 +37,7 @@ config KVM select TASK_DELAY_ACCT select PERF_EVENTS select HAVE_KVM_MSI + select HAVE_KVM_CPU_RELAX_INTERCEPT ---help--- Support hosting fully virtualized guest machines using hardware virtualization extensions. You will need a fairly recent diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index 0595f1397b7c..b496da684bd6 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -316,7 +316,7 @@ static int do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function, } case 7: { entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; - /* Mask ebx against host capbability word 9 */ + /* Mask ebx against host capability word 9 */ if (index == 0) { entry->ebx &= kvm_supported_word9_x86_features; cpuid_mask(&entry->ebx, 9); diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 97d9a9914ba8..85b611e13e84 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -642,7 +642,7 @@ static int __linearize(struct x86_emulate_ctxt *ctxt, if (addr.ea > lim || (u32)(addr.ea + size - 1) > lim) goto bad; } else { - /* exapand-down segment */ + /* expand-down segment */ if (addr.ea <= lim || (u32)(addr.ea + size - 1) <= lim) goto bad; lim = desc.d ? 0xffffffff : 0xffff; @@ -1383,7 +1383,7 @@ static int load_segment_descriptor(struct x86_emulate_ctxt *ctxt, err_code = selector & 0xfffc; err_vec = GP_VECTOR; - /* can't load system descriptor into segment selecor */ + /* can't load system descriptor into segment selector */ if (seg <= VCPU_SREG_GS && !seg_desc.s) goto exception; @@ -2398,7 +2398,7 @@ static int load_state_from_tss16(struct x86_emulate_ctxt *ctxt, set_segment_selector(ctxt, tss->ds, VCPU_SREG_DS); /* - * Now load segment descriptors. If fault happenes at this stage + * Now load segment descriptors. If fault happens at this stage * it is handled in a context of new task */ ret = load_segment_descriptor(ctxt, tss->ldt, VCPU_SREG_LDTR); @@ -2640,7 +2640,7 @@ static int emulator_do_task_switch(struct x86_emulate_ctxt *ctxt, * * 1. jmp/call/int to task gate: Check against DPL of the task gate * 2. Exception/IRQ/iret: No check is performed - * 3. jmp/call to TSS: Check agains DPL of the TSS + * 3. jmp/call to TSS: Check against DPL of the TSS */ if (reason == TASK_SWITCH_GATE) { if (idt_index != -1) { @@ -2681,7 +2681,7 @@ static int emulator_do_task_switch(struct x86_emulate_ctxt *ctxt, ctxt->eflags = ctxt->eflags & ~X86_EFLAGS_NT; /* set back link to prev task only if NT bit is set in eflags - note that old_tss_sel is not used afetr this point */ + note that old_tss_sel is not used after this point */ if (reason != TASK_SWITCH_CALL && reason != TASK_SWITCH_GATE) old_tss_sel = 0xffff; diff --git a/arch/x86/kvm/irq.h b/arch/x86/kvm/irq.h index 2086f2bfba33..2d03568e9498 100644 --- a/arch/x86/kvm/irq.h +++ b/arch/x86/kvm/irq.h @@ -70,7 +70,7 @@ struct kvm_pic { struct kvm_io_device dev_slave; struct kvm_io_device dev_eclr; void (*ack_notifier)(void *opaque, int irq); - unsigned long irq_states[16]; + unsigned long irq_states[PIC_NUM_PINS]; }; struct kvm_pic *kvm_create_pic(struct kvm *kvm); diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index ce878788a39f..fff7173f6a71 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -719,7 +719,7 @@ static int apic_reg_read(struct kvm_lapic *apic, u32 offset, int len, { unsigned char alignment = offset & 0xf; u32 result; - /* this bitmask has a bit cleared for each reserver register */ + /* this bitmask has a bit cleared for each reserved register */ static const u64 rmask = 0x43ff01ffffffe70cULL; if ((alignment + len) > 4) { @@ -792,7 +792,7 @@ static void start_apic_timer(struct kvm_lapic *apic) atomic_set(&apic->lapic_timer.pending, 0); if (apic_lvtt_period(apic) || apic_lvtt_oneshot(apic)) { - /* lapic timer in oneshot or peroidic mode */ + /* lapic timer in oneshot or periodic mode */ now = apic->lapic_timer.timer.base->get_time(); apic->lapic_timer.period = (u64)apic_get_reg(apic, APIC_TMICT) * APIC_BUS_CYCLE_NS * apic->divide_count; diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 01ca00423938..241993443599 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -556,6 +556,14 @@ static int mmu_spte_clear_track_bits(u64 *sptep) return 0; pfn = spte_to_pfn(old_spte); + + /* + * KVM does not hold the refcount of the page used by + * kvm mmu, before reclaiming the page, we should + * unmap it from mmu first. + */ + WARN_ON(!kvm_is_mmio_pfn(pfn) && !page_count(pfn_to_page(pfn))); + if (!shadow_accessed_mask || old_spte & shadow_accessed_mask) kvm_set_pfn_accessed(pfn); if (!shadow_dirty_mask || (old_spte & shadow_dirty_mask)) @@ -960,13 +968,13 @@ static void pte_list_walk(unsigned long *pte_list, pte_list_walk_fn fn) static unsigned long *__gfn_to_rmap(gfn_t gfn, int level, struct kvm_memory_slot *slot) { - struct kvm_lpage_info *linfo; + unsigned long idx; if (likely(level == PT_PAGE_TABLE_LEVEL)) return &slot->rmap[gfn - slot->base_gfn]; - linfo = lpage_info_slot(gfn, slot, level); - return &linfo->rmap_pde; + idx = gfn_to_index(gfn, slot->base_gfn, level); + return &slot->arch.rmap_pde[level - PT_DIRECTORY_LEVEL][idx]; } /* @@ -1200,7 +1208,7 @@ static bool rmap_write_protect(struct kvm *kvm, u64 gfn) } static int kvm_unmap_rmapp(struct kvm *kvm, unsigned long *rmapp, - unsigned long data) + struct kvm_memory_slot *slot, unsigned long data) { u64 *sptep; struct rmap_iterator iter; @@ -1218,7 +1226,7 @@ static int kvm_unmap_rmapp(struct kvm *kvm, unsigned long *rmapp, } static int kvm_set_pte_rmapp(struct kvm *kvm, unsigned long *rmapp, - unsigned long data) + struct kvm_memory_slot *slot, unsigned long data) { u64 *sptep; struct rmap_iterator iter; @@ -1259,43 +1267,67 @@ static int kvm_set_pte_rmapp(struct kvm *kvm, unsigned long *rmapp, return 0; } -static int kvm_handle_hva(struct kvm *kvm, unsigned long hva, - unsigned long data, - int (*handler)(struct kvm *kvm, unsigned long *rmapp, - unsigned long data)) +static int kvm_handle_hva_range(struct kvm *kvm, + unsigned long start, + unsigned long end, + unsigned long data, + int (*handler)(struct kvm *kvm, + unsigned long *rmapp, + struct kvm_memory_slot *slot, + unsigned long data)) { int j; - int ret; - int retval = 0; + int ret = 0; struct kvm_memslots *slots; struct kvm_memory_slot *memslot; slots = kvm_memslots(kvm); kvm_for_each_memslot(memslot, slots) { - unsigned long start = memslot->userspace_addr; - unsigned long end; + unsigned long hva_start, hva_end; + gfn_t gfn_start, gfn_end; - end = start + (memslot->npages << PAGE_SHIFT); - if (hva >= start && hva < end) { - gfn_t gfn_offset = (hva - start) >> PAGE_SHIFT; - gfn_t gfn = memslot->base_gfn + gfn_offset; + hva_start = max(start, memslot->userspace_addr); + hva_end = min(end, memslot->userspace_addr + + (memslot->npages << PAGE_SHIFT)); + if (hva_start >= hva_end) + continue; + /* + * {gfn(page) | page intersects with [hva_start, hva_end)} = + * {gfn_start, gfn_start+1, ..., gfn_end-1}. + */ + gfn_start = hva_to_gfn_memslot(hva_start, memslot); + gfn_end = hva_to_gfn_memslot(hva_end + PAGE_SIZE - 1, memslot); - ret = handler(kvm, &memslot->rmap[gfn_offset], data); + for (j = PT_PAGE_TABLE_LEVEL; + j < PT_PAGE_TABLE_LEVEL + KVM_NR_PAGE_SIZES; ++j) { + unsigned long idx, idx_end; + unsigned long *rmapp; - for (j = 0; j < KVM_NR_PAGE_SIZES - 1; ++j) { - struct kvm_lpage_info *linfo; + /* + * {idx(page_j) | page_j intersects with + * [hva_start, hva_end)} = {idx, idx+1, ..., idx_end}. + */ + idx = gfn_to_index(gfn_start, memslot->base_gfn, j); + idx_end = gfn_to_index(gfn_end - 1, memslot->base_gfn, j); - linfo = lpage_info_slot(gfn, memslot, - PT_DIRECTORY_LEVEL + j); - ret |= handler(kvm, &linfo->rmap_pde, data); - } - trace_kvm_age_page(hva, memslot, ret); - retval |= ret; + rmapp = __gfn_to_rmap(gfn_start, j, memslot); + + for (; idx <= idx_end; ++idx) + ret |= handler(kvm, rmapp++, memslot, data); } } - return retval; + return ret; +} + +static int kvm_handle_hva(struct kvm *kvm, unsigned long hva, + unsigned long data, + int (*handler)(struct kvm *kvm, unsigned long *rmapp, + struct kvm_memory_slot *slot, + unsigned long data)) +{ + return kvm_handle_hva_range(kvm, hva, hva + 1, data, handler); } int kvm_unmap_hva(struct kvm *kvm, unsigned long hva) @@ -1303,13 +1335,18 @@ int kvm_unmap_hva(struct kvm *kvm, unsigned long hva) return kvm_handle_hva(kvm, hva, 0, kvm_unmap_rmapp); } +int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end) +{ + return kvm_handle_hva_range(kvm, start, end, 0, kvm_unmap_rmapp); +} + void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte) { kvm_handle_hva(kvm, hva, (unsigned long)&pte, kvm_set_pte_rmapp); } static int kvm_age_rmapp(struct kvm *kvm, unsigned long *rmapp, - unsigned long data) + struct kvm_memory_slot *slot, unsigned long data) { u64 *sptep; struct rmap_iterator uninitialized_var(iter); @@ -1323,8 +1360,10 @@ static int kvm_age_rmapp(struct kvm *kvm, unsigned long *rmapp, * This has some overhead, but not as much as the cost of swapping * out actively used pages or breaking up actively used hugepages. */ - if (!shadow_accessed_mask) - return kvm_unmap_rmapp(kvm, rmapp, data); + if (!shadow_accessed_mask) { + young = kvm_unmap_rmapp(kvm, rmapp, slot, data); + goto out; + } for (sptep = rmap_get_first(*rmapp, &iter); sptep; sptep = rmap_get_next(&iter)) { @@ -1336,12 +1375,14 @@ static int kvm_age_rmapp(struct kvm *kvm, unsigned long *rmapp, (unsigned long *)sptep); } } - +out: + /* @data has hva passed to kvm_age_hva(). */ + trace_kvm_age_page(data, slot, young); return young; } static int kvm_test_age_rmapp(struct kvm *kvm, unsigned long *rmapp, - unsigned long data) + struct kvm_memory_slot *slot, unsigned long data) { u64 *sptep; struct rmap_iterator iter; @@ -1379,13 +1420,13 @@ static void rmap_recycle(struct kvm_vcpu *vcpu, u64 *spte, gfn_t gfn) rmapp = gfn_to_rmap(vcpu->kvm, gfn, sp->role.level); - kvm_unmap_rmapp(vcpu->kvm, rmapp, 0); + kvm_unmap_rmapp(vcpu->kvm, rmapp, NULL, 0); kvm_flush_remote_tlbs(vcpu->kvm); } int kvm_age_hva(struct kvm *kvm, unsigned long hva) { - return kvm_handle_hva(kvm, hva, 0, kvm_age_rmapp); + return kvm_handle_hva(kvm, hva, hva, kvm_age_rmapp); } int kvm_test_age_hva(struct kvm *kvm, unsigned long hva) @@ -2472,14 +2513,12 @@ static pfn_t pte_prefetch_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn, unsigned long hva; slot = gfn_to_memslot_dirty_bitmap(vcpu, gfn, no_dirty_log); - if (!slot) { - get_page(fault_page); - return page_to_pfn(fault_page); - } + if (!slot) + return get_fault_pfn(); hva = gfn_to_hva_memslot(slot, gfn); - return hva_to_pfn_atomic(vcpu->kvm, hva); + return hva_to_pfn_atomic(hva); } static int direct_pte_prefetch_many(struct kvm_vcpu *vcpu, diff --git a/arch/x86/kvm/pmu.c b/arch/x86/kvm/pmu.c index 9b7ec1150ab0..cfc258a6bf97 100644 --- a/arch/x86/kvm/pmu.c +++ b/arch/x86/kvm/pmu.c @@ -1,5 +1,5 @@ /* - * Kernel-based Virtual Machine -- Performane Monitoring Unit support + * Kernel-based Virtual Machine -- Performance Monitoring Unit support * * Copyright 2011 Red Hat, Inc. and/or its affiliates. * diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index baead950d6c8..687d0c30e559 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -2063,7 +2063,7 @@ static inline bool nested_svm_intr(struct vcpu_svm *svm) if (svm->nested.intercept & 1ULL) { /* * The #vmexit can't be emulated here directly because this - * code path runs with irqs and preemtion disabled. A + * code path runs with irqs and preemption disabled. A * #vmexit emulation might sleep. Only signal request for * the #vmexit here. */ @@ -2409,7 +2409,7 @@ static bool nested_svm_vmrun_msrpm(struct vcpu_svm *svm) { /* * This function merges the msr permission bitmaps of kvm and the - * nested vmcb. It is omptimized in that it only merges the parts where + * nested vmcb. It is optimized in that it only merges the parts where * the kvm msr permission bitmap may contain zero bits */ int i; diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index c39b60707e02..2300e5319ed9 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -1343,7 +1343,7 @@ static bool update_transition_efer(struct vcpu_vmx *vmx, int efer_offset) guest_efer = vmx->vcpu.arch.efer; /* - * NX is emulated; LMA and LME handled by hardware; SCE meaninless + * NX is emulated; LMA and LME handled by hardware; SCE meaningless * outside long mode */ ignore_bits = EFER_NX | EFER_SCE; @@ -3261,7 +3261,7 @@ static void vmx_set_segment(struct kvm_vcpu *vcpu, * qemu binaries. * IA32 arch specifies that at the time of processor reset the * "Accessed" bit in the AR field of segment registers is 1. And qemu - * is setting it to 0 in the usedland code. This causes invalid guest + * is setting it to 0 in the userland code. This causes invalid guest * state vmexit when "unrestricted guest" mode is turned on. * Fix for this setup issue in cpu_reset is being pushed in the qemu * tree. Newer qemu binaries with that qemu fix would not need this @@ -4446,7 +4446,7 @@ vmx_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall) hypercall[2] = 0xc1; } -/* called to set cr0 as approriate for a mov-to-cr0 exit. */ +/* called to set cr0 as appropriate for a mov-to-cr0 exit. */ static int handle_set_cr0(struct kvm_vcpu *vcpu, unsigned long val) { if (to_vmx(vcpu)->nested.vmxon && diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 59b59508ff07..3d9d08edbf29 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -1093,7 +1093,7 @@ void kvm_write_tsc(struct kvm_vcpu *vcpu, u64 data) * For each generation, we track the original measured * nanosecond time, offset, and write, so if TSCs are in * sync, we can match exact offset, and if not, we can match - * exact software computaion in compute_guest_tsc() + * exact software computation in compute_guest_tsc() * * These values are tracked in kvm->arch.cur_xxx variables. */ @@ -1500,7 +1500,7 @@ static int kvm_pv_enable_async_pf(struct kvm_vcpu *vcpu, u64 data) { gpa_t gpa = data & ~0x3f; - /* Bits 2:5 are resrved, Should be zero */ + /* Bits 2:5 are reserved, Should be zero */ if (data & 0x3c) return 1; @@ -1723,7 +1723,7 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data) * Ignore all writes to this no longer documented MSR. * Writes are only relevant for old K7 processors, * all pre-dating SVM, but a recommended workaround from - * AMD for these chips. It is possible to speicify the + * AMD for these chips. It is possible to specify the * affected processor models on the command line, hence * the need to ignore the workaround. */ @@ -2632,7 +2632,6 @@ static int kvm_set_guest_paused(struct kvm_vcpu *vcpu) if (!vcpu->arch.time_page) return -EINVAL; src->flags |= PVCLOCK_GUEST_STOPPED; - mark_page_dirty(vcpu->kvm, vcpu->arch.time >> PAGE_SHIFT); kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); return 0; } @@ -4492,7 +4491,7 @@ static bool reexecute_instruction(struct kvm_vcpu *vcpu, gva_t gva) /* * if emulation was due to access to shadowed page table - * and it failed try to unshadow page and re-entetr the + * and it failed try to unshadow page and re-enter the * guest to let CPU execute the instruction. */ if (kvm_mmu_unprotect_page_virt(vcpu, gva)) @@ -5588,7 +5587,7 @@ int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) /* * We are here if userspace calls get_regs() in the middle of * instruction emulation. Registers state needs to be copied - * back from emulation context to vcpu. Usrapace shouldn't do + * back from emulation context to vcpu. Userspace shouldn't do * that usually, but some bad designed PV devices (vmware * backdoor interface) need this to work */ @@ -6117,7 +6116,7 @@ int kvm_arch_hardware_enable(void *garbage) * as we reset last_host_tsc on all VCPUs to stop this from being * called multiple times (one for each physical CPU bringup). * - * Platforms with unnreliable TSCs don't have to deal with this, they + * Platforms with unreliable TSCs don't have to deal with this, they * will be compensated by the logic in vcpu_load, which sets the TSC to * catchup mode. This will catchup all VCPUs to real time, but cannot * guarantee that they stay in perfect synchronization. @@ -6314,6 +6313,10 @@ void kvm_arch_free_memslot(struct kvm_memory_slot *free, int i; for (i = 0; i < KVM_NR_PAGE_SIZES - 1; ++i) { + if (!dont || free->arch.rmap_pde[i] != dont->arch.rmap_pde[i]) { + kvm_kvfree(free->arch.rmap_pde[i]); + free->arch.rmap_pde[i] = NULL; + } if (!dont || free->arch.lpage_info[i] != dont->arch.lpage_info[i]) { kvm_kvfree(free->arch.lpage_info[i]); free->arch.lpage_info[i] = NULL; @@ -6333,6 +6336,11 @@ int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages) lpages = gfn_to_index(slot->base_gfn + npages - 1, slot->base_gfn, level) + 1; + slot->arch.rmap_pde[i] = + kvm_kvzalloc(lpages * sizeof(*slot->arch.rmap_pde[i])); + if (!slot->arch.rmap_pde[i]) + goto out_free; + slot->arch.lpage_info[i] = kvm_kvzalloc(lpages * sizeof(*slot->arch.lpage_info[i])); if (!slot->arch.lpage_info[i]) @@ -6361,7 +6369,9 @@ int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages) out_free: for (i = 0; i < KVM_NR_PAGE_SIZES - 1; ++i) { + kvm_kvfree(slot->arch.rmap_pde[i]); kvm_kvfree(slot->arch.lpage_info[i]); + slot->arch.rmap_pde[i] = NULL; slot->arch.lpage_info[i] = NULL; } return -ENOMEM; @@ -6381,7 +6391,7 @@ int kvm_arch_prepare_memory_region(struct kvm *kvm, map_flags = MAP_SHARED | MAP_ANONYMOUS; /*To keep backward compatibility with older userspace, - *x86 needs to hanlde !user_alloc case. + *x86 needs to handle !user_alloc case. */ if (!user_alloc) { if (npages && !old.rmap) { diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index b70b48b01098..1993eb1cb2cd 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -183,6 +183,18 @@ struct kvm_vcpu { } async_pf; #endif +#ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT + /* + * Cpu relax intercept or pause loop exit optimization + * in_spin_loop: set when a vcpu does a pause loop exit + * or cpu relax intercepted. + * dy_eligible: indicates whether vcpu is eligible for directed yield. + */ + struct { + bool in_spin_loop; + bool dy_eligible; + } spin_loop; +#endif struct kvm_vcpu_arch arch; }; @@ -378,20 +390,11 @@ id_to_memslot(struct kvm_memslots *slots, int id) return slot; } -#define HPA_MSB ((sizeof(hpa_t) * 8) - 1) -#define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB) -static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; } - extern struct page *bad_page; -extern struct page *fault_page; - -extern pfn_t bad_pfn; -extern pfn_t fault_pfn; int is_error_page(struct page *page); int is_error_pfn(pfn_t pfn); int is_hwpoison_pfn(pfn_t pfn); -int is_fault_pfn(pfn_t pfn); int is_noslot_pfn(pfn_t pfn); int is_invalid_pfn(pfn_t pfn); int kvm_is_error_hva(unsigned long addr); @@ -427,20 +430,20 @@ void kvm_release_page_dirty(struct page *page); void kvm_set_page_dirty(struct page *page); void kvm_set_page_accessed(struct page *page); -pfn_t hva_to_pfn_atomic(struct kvm *kvm, unsigned long addr); +pfn_t hva_to_pfn_atomic(unsigned long addr); pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn); pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async, bool write_fault, bool *writable); pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn); pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault, bool *writable); -pfn_t gfn_to_pfn_memslot(struct kvm *kvm, - struct kvm_memory_slot *slot, gfn_t gfn); +pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn); void kvm_release_pfn_dirty(pfn_t); void kvm_release_pfn_clean(pfn_t pfn); void kvm_set_pfn_dirty(pfn_t pfn); void kvm_set_pfn_accessed(pfn_t pfn); void kvm_get_pfn(pfn_t pfn); +pfn_t get_fault_pfn(void); int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset, int len); @@ -740,6 +743,14 @@ static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level) (base_gfn >> KVM_HPAGE_GFN_SHIFT(level)); } +static inline gfn_t +hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot) +{ + gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT; + + return slot->base_gfn + gfn_offset; +} + static inline unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn) { @@ -899,5 +910,32 @@ static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu) } } +#ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT + +static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val) +{ + vcpu->spin_loop.in_spin_loop = val; +} +static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val) +{ + vcpu->spin_loop.dy_eligible = val; +} + +#else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */ + +static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val) +{ +} + +static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val) +{ +} + +static inline bool kvm_vcpu_eligible_for_directed_yield(struct kvm_vcpu *vcpu) +{ + return true; +} + +#endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */ #endif diff --git a/virt/kvm/Kconfig b/virt/kvm/Kconfig index 28694f4a9139..d01b24b72c61 100644 --- a/virt/kvm/Kconfig +++ b/virt/kvm/Kconfig @@ -21,3 +21,6 @@ config KVM_ASYNC_PF config HAVE_KVM_MSI bool + +config HAVE_KVM_CPU_RELAX_INTERCEPT + bool diff --git a/virt/kvm/iommu.c b/virt/kvm/iommu.c index e9fff9830bf0..c03f1fb26701 100644 --- a/virt/kvm/iommu.c +++ b/virt/kvm/iommu.c @@ -42,13 +42,13 @@ static int kvm_iommu_unmap_memslots(struct kvm *kvm); static void kvm_iommu_put_pages(struct kvm *kvm, gfn_t base_gfn, unsigned long npages); -static pfn_t kvm_pin_pages(struct kvm *kvm, struct kvm_memory_slot *slot, - gfn_t gfn, unsigned long size) +static pfn_t kvm_pin_pages(struct kvm_memory_slot *slot, gfn_t gfn, + unsigned long size) { gfn_t end_gfn; pfn_t pfn; - pfn = gfn_to_pfn_memslot(kvm, slot, gfn); + pfn = gfn_to_pfn_memslot(slot, gfn); end_gfn = gfn + (size >> PAGE_SHIFT); gfn += 1; @@ -56,7 +56,7 @@ static pfn_t kvm_pin_pages(struct kvm *kvm, struct kvm_memory_slot *slot, return pfn; while (gfn < end_gfn) - gfn_to_pfn_memslot(kvm, slot, gfn++); + gfn_to_pfn_memslot(slot, gfn++); return pfn; } @@ -105,7 +105,7 @@ int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot) * Pin all pages we are about to map in memory. This is * important because we unmap and unpin in 4kb steps later. */ - pfn = kvm_pin_pages(kvm, slot, gfn, page_size); + pfn = kvm_pin_pages(slot, gfn, page_size); if (is_error_pfn(pfn)) { gfn += 1; continue; diff --git a/virt/kvm/irq_comm.c b/virt/kvm/irq_comm.c index 83402d74a767..7118be0f2f2c 100644 --- a/virt/kvm/irq_comm.c +++ b/virt/kvm/irq_comm.c @@ -321,11 +321,11 @@ static int setup_routing_entry(struct kvm_irq_routing_table *rt, switch (ue->u.irqchip.irqchip) { case KVM_IRQCHIP_PIC_MASTER: e->set = kvm_set_pic_irq; - max_pin = 16; + max_pin = PIC_NUM_PINS; break; case KVM_IRQCHIP_PIC_SLAVE: e->set = kvm_set_pic_irq; - max_pin = 16; + max_pin = PIC_NUM_PINS; delta = 8; break; case KVM_IRQCHIP_IOAPIC: diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 246852397e30..0014ee99dc7f 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -100,11 +100,14 @@ EXPORT_SYMBOL_GPL(kvm_rebooting); static bool largepages_enabled = true; +struct page *bad_page; +static pfn_t bad_pfn; + static struct page *hwpoison_page; static pfn_t hwpoison_pfn; |