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-rw-r--r--virt/kvm/assigned-dev.c15
-rw-r--r--virt/kvm/coalesced_mmio.c7
-rw-r--r--virt/kvm/eventfd.c1
-rw-r--r--virt/kvm/ioapic.c6
-rw-r--r--virt/kvm/iommu.c129
-rw-r--r--virt/kvm/irq_comm.c15
-rw-r--r--virt/kvm/kvm_main.c169
7 files changed, 239 insertions, 103 deletions
diff --git a/virt/kvm/assigned-dev.c b/virt/kvm/assigned-dev.c
index 02ff2b19dbe..7c98928b09d 100644
--- a/virt/kvm/assigned-dev.c
+++ b/virt/kvm/assigned-dev.c
@@ -1,7 +1,7 @@
/*
* Kernel-based Virtual Machine - device assignment support
*
- * Copyright (C) 2006-9 Red Hat, Inc
+ * Copyright (C) 2010 Red Hat, Inc. and/or its affiliates.
*
* This work is licensed under the terms of the GNU GPL, version 2. See
* the COPYING file in the top-level directory.
@@ -58,12 +58,10 @@ static int find_index_from_host_irq(struct kvm_assigned_dev_kernel
static void kvm_assigned_dev_interrupt_work_handler(struct work_struct *work)
{
struct kvm_assigned_dev_kernel *assigned_dev;
- struct kvm *kvm;
int i;
assigned_dev = container_of(work, struct kvm_assigned_dev_kernel,
interrupt_work);
- kvm = assigned_dev->kvm;
spin_lock_irq(&assigned_dev->assigned_dev_lock);
if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSIX) {
@@ -316,12 +314,16 @@ static int assigned_device_enable_host_msix(struct kvm *kvm,
kvm_assigned_dev_intr, 0,
"kvm_assigned_msix_device",
(void *)dev);
- /* FIXME: free requested_irq's on failure */
if (r)
- return r;
+ goto err;
}
return 0;
+err:
+ for (i -= 1; i >= 0; i--)
+ free_irq(dev->host_msix_entries[i].vector, (void *)dev);
+ pci_disable_msix(dev->dev);
+ return r;
}
#endif
@@ -444,9 +446,6 @@ static int kvm_vm_ioctl_assign_irq(struct kvm *kvm,
struct kvm_assigned_dev_kernel *match;
unsigned long host_irq_type, guest_irq_type;
- if (!capable(CAP_SYS_RAWIO))
- return -EPERM;
-
if (!irqchip_in_kernel(kvm))
return r;
diff --git a/virt/kvm/coalesced_mmio.c b/virt/kvm/coalesced_mmio.c
index 36e25802964..fc8487564d1 100644
--- a/virt/kvm/coalesced_mmio.c
+++ b/virt/kvm/coalesced_mmio.c
@@ -2,6 +2,7 @@
* KVM coalesced MMIO
*
* Copyright (c) 2008 Bull S.A.S.
+ * Copyright 2009 Red Hat, Inc. and/or its affiliates.
*
* Author: Laurent Vivier <Laurent.Vivier@bull.net>
*
@@ -120,8 +121,10 @@ int kvm_coalesced_mmio_init(struct kvm *kvm)
return ret;
out_free_dev:
+ kvm->coalesced_mmio_dev = NULL;
kfree(dev);
out_free_page:
+ kvm->coalesced_mmio_ring = NULL;
__free_page(page);
out_err:
return ret;
@@ -139,7 +142,7 @@ int kvm_vm_ioctl_register_coalesced_mmio(struct kvm *kvm,
struct kvm_coalesced_mmio_dev *dev = kvm->coalesced_mmio_dev;
if (dev == NULL)
- return -EINVAL;
+ return -ENXIO;
mutex_lock(&kvm->slots_lock);
if (dev->nb_zones >= KVM_COALESCED_MMIO_ZONE_MAX) {
@@ -162,7 +165,7 @@ int kvm_vm_ioctl_unregister_coalesced_mmio(struct kvm *kvm,
struct kvm_coalesced_mmio_zone *z;
if (dev == NULL)
- return -EINVAL;
+ return -ENXIO;
mutex_lock(&kvm->slots_lock);
diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c
index b81f0ebbaaa..66cf65b510b 100644
--- a/virt/kvm/eventfd.c
+++ b/virt/kvm/eventfd.c
@@ -2,6 +2,7 @@
* kvm eventfd support - use eventfd objects to signal various KVM events
*
* Copyright 2009 Novell. All Rights Reserved.
+ * Copyright 2010 Red Hat, Inc. and/or its affiliates.
*
* Author:
* Gregory Haskins <ghaskins@novell.com>
diff --git a/virt/kvm/ioapic.c b/virt/kvm/ioapic.c
index 7c79c1d76d0..0b9df8303dc 100644
--- a/virt/kvm/ioapic.c
+++ b/virt/kvm/ioapic.c
@@ -1,5 +1,6 @@
/*
* Copyright (C) 2001 MandrakeSoft S.A.
+ * Copyright 2010 Red Hat, Inc. and/or its affiliates.
*
* MandrakeSoft S.A.
* 43, rue d'Aboukir
@@ -151,7 +152,7 @@ static void ioapic_write_indirect(struct kvm_ioapic *ioapic, u32 val)
update_handled_vectors(ioapic);
mask_after = e->fields.mask;
if (mask_before != mask_after)
- kvm_fire_mask_notifiers(ioapic->kvm, index, mask_after);
+ kvm_fire_mask_notifiers(ioapic->kvm, KVM_IRQCHIP_IOAPIC, index, mask_after);
if (e->fields.trig_mode == IOAPIC_LEVEL_TRIG
&& ioapic->irr & (1 << index))
ioapic_service(ioapic, index);
@@ -192,12 +193,13 @@ static int ioapic_deliver(struct kvm_ioapic *ioapic, int irq)
int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int level)
{
- u32 old_irr = ioapic->irr;
+ u32 old_irr;
u32 mask = 1 << irq;
union kvm_ioapic_redirect_entry entry;
int ret = 1;
spin_lock(&ioapic->lock);
+ old_irr = ioapic->irr;
if (irq >= 0 && irq < IOAPIC_NUM_PINS) {
entry = ioapic->redirtbl[irq];
level ^= entry.fields.polarity;
diff --git a/virt/kvm/iommu.c b/virt/kvm/iommu.c
index 80fd3ad3b2d..62a9caf0563 100644
--- a/virt/kvm/iommu.c
+++ b/virt/kvm/iommu.c
@@ -16,6 +16,8 @@
*
* Copyright (C) 2006-2008 Intel Corporation
* Copyright IBM Corporation, 2008
+ * Copyright 2010 Red Hat, Inc. and/or its affiliates.
+ *
* Author: Allen M. Kay <allen.m.kay@intel.com>
* Author: Weidong Han <weidong.han@intel.com>
* Author: Ben-Ami Yassour <benami@il.ibm.com>
@@ -32,12 +34,30 @@ 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)
+{
+ gfn_t end_gfn;
+ pfn_t pfn;
+
+ pfn = gfn_to_pfn_memslot(kvm, slot, gfn);
+ end_gfn = gfn + (size >> PAGE_SHIFT);
+ gfn += 1;
+
+ if (is_error_pfn(pfn))
+ return pfn;
+
+ while (gfn < end_gfn)
+ gfn_to_pfn_memslot(kvm, slot, gfn++);
+
+ return pfn;
+}
+
int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot)
{
- gfn_t gfn = slot->base_gfn;
- unsigned long npages = slot->npages;
+ gfn_t gfn, end_gfn;
pfn_t pfn;
- int i, r = 0;
+ int r = 0;
struct iommu_domain *domain = kvm->arch.iommu_domain;
int flags;
@@ -45,46 +65,79 @@ int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot)
if (!domain)
return 0;
+ gfn = slot->base_gfn;
+ end_gfn = gfn + slot->npages;
+
flags = IOMMU_READ | IOMMU_WRITE;
if (kvm->arch.iommu_flags & KVM_IOMMU_CACHE_COHERENCY)
flags |= IOMMU_CACHE;
- for (i = 0; i < npages; i++) {
- /* check if already mapped */
- if (iommu_iova_to_phys(domain, gfn_to_gpa(gfn)))
+
+ while (gfn < end_gfn) {
+ unsigned long page_size;
+
+ /* Check if already mapped */
+ if (iommu_iova_to_phys(domain, gfn_to_gpa(gfn))) {
+ gfn += 1;
+ continue;
+ }
+
+ /* Get the page size we could use to map */
+ page_size = kvm_host_page_size(kvm, gfn);
+
+ /* Make sure the page_size does not exceed the memslot */
+ while ((gfn + (page_size >> PAGE_SHIFT)) > end_gfn)
+ page_size >>= 1;
+
+ /* Make sure gfn is aligned to the page size we want to map */
+ while ((gfn << PAGE_SHIFT) & (page_size - 1))
+ page_size >>= 1;
+
+ /*
+ * 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);
+ if (is_error_pfn(pfn)) {
+ gfn += 1;
continue;
+ }
- pfn = gfn_to_pfn_memslot(kvm, slot, gfn);
- r = iommu_map_range(domain,
- gfn_to_gpa(gfn),
- pfn_to_hpa(pfn),
- PAGE_SIZE, flags);
+ /* Map into IO address space */
+ r = iommu_map(domain, gfn_to_gpa(gfn), pfn_to_hpa(pfn),
+ get_order(page_size), flags);
if (r) {
printk(KERN_ERR "kvm_iommu_map_address:"
- "iommu failed to map pfn=%lx\n", pfn);
+ "iommu failed to map pfn=%llx\n", pfn);
goto unmap_pages;
}
- gfn++;
+
+ gfn += page_size >> PAGE_SHIFT;
+
+
}
+
return 0;
unmap_pages:
- kvm_iommu_put_pages(kvm, slot->base_gfn, i);
+ kvm_iommu_put_pages(kvm, slot->base_gfn, gfn);
return r;
}
static int kvm_iommu_map_memslots(struct kvm *kvm)
{
- int i, r = 0;
+ int i, idx, r = 0;
struct kvm_memslots *slots;
- slots = rcu_dereference(kvm->memslots);
+ idx = srcu_read_lock(&kvm->srcu);
+ slots = kvm_memslots(kvm);
for (i = 0; i < slots->nmemslots; i++) {
r = kvm_iommu_map_pages(kvm, &slots->memslots[i]);
if (r)
break;
}
+ srcu_read_unlock(&kvm->srcu, idx);
return r;
}
@@ -189,40 +242,62 @@ out_unmap:
return r;
}
+static void kvm_unpin_pages(struct kvm *kvm, pfn_t pfn, unsigned long npages)
+{
+ unsigned long i;
+
+ for (i = 0; i < npages; ++i)
+ kvm_release_pfn_clean(pfn + i);
+}
+
static void kvm_iommu_put_pages(struct kvm *kvm,
gfn_t base_gfn, unsigned long npages)
{
- gfn_t gfn = base_gfn;
+ struct iommu_domain *domain;
+ gfn_t end_gfn, gfn;
pfn_t pfn;
- struct iommu_domain *domain = kvm->arch.iommu_domain;
- unsigned long i;
u64 phys;
+ domain = kvm->arch.iommu_domain;
+ end_gfn = base_gfn + npages;
+ gfn = base_gfn;
+
/* check if iommu exists and in use */
if (!domain)
return;
- for (i = 0; i < npages; i++) {
+ while (gfn < end_gfn) {
+ unsigned long unmap_pages;
+ int order;
+
+ /* Get physical address */
phys = iommu_iova_to_phys(domain, gfn_to_gpa(gfn));
- pfn = phys >> PAGE_SHIFT;
- kvm_release_pfn_clean(pfn);
- gfn++;
- }
+ pfn = phys >> PAGE_SHIFT;
+
+ /* Unmap address from IO address space */
+ order = iommu_unmap(domain, gfn_to_gpa(gfn), 0);
+ unmap_pages = 1ULL << order;
- iommu_unmap_range(domain, gfn_to_gpa(base_gfn), PAGE_SIZE * npages);
+ /* Unpin all pages we just unmapped to not leak any memory */
+ kvm_unpin_pages(kvm, pfn, unmap_pages);
+
+ gfn += unmap_pages;
+ }
}
static int kvm_iommu_unmap_memslots(struct kvm *kvm)
{
- int i;
+ int i, idx;
struct kvm_memslots *slots;
- slots = rcu_dereference(kvm->memslots);
+ idx = srcu_read_lock(&kvm->srcu);
+ slots = kvm_memslots(kvm);
for (i = 0; i < slots->nmemslots; i++) {
kvm_iommu_put_pages(kvm, slots->memslots[i].base_gfn,
slots->memslots[i].npages);
}
+ srcu_read_unlock(&kvm->srcu, idx);
return 0;
}
diff --git a/virt/kvm/irq_comm.c b/virt/kvm/irq_comm.c
index a0e88809e45..369e38010ad 100644
--- a/virt/kvm/irq_comm.c
+++ b/virt/kvm/irq_comm.c
@@ -17,6 +17,7 @@
* Authors:
* Yaozu (Eddie) Dong <Eddie.dong@intel.com>
*
+ * Copyright 2010 Red Hat, Inc. and/or its affilates.
*/
#include <linux/kvm_host.h>
@@ -99,7 +100,7 @@ int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
if (r < 0)
r = 0;
r += kvm_apic_set_irq(vcpu, irq);
- } else {
+ } else if (kvm_lapic_enabled(vcpu)) {
if (!lowest)
lowest = vcpu;
else if (kvm_apic_compare_prio(vcpu, lowest) < 0)
@@ -278,15 +279,19 @@ void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
synchronize_rcu();
}
-void kvm_fire_mask_notifiers(struct kvm *kvm, int irq, bool mask)
+void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
+ bool mask)
{
struct kvm_irq_mask_notifier *kimn;
struct hlist_node *n;
+ int gsi;
rcu_read_lock();
- hlist_for_each_entry_rcu(kimn, n, &kvm->mask_notifier_list, link)
- if (kimn->irq == irq)
- kimn->func(kimn, mask);
+ gsi = rcu_dereference(kvm->irq_routing)->chip[irqchip][pin];
+ if (gsi != -1)
+ hlist_for_each_entry_rcu(kimn, n, &kvm->mask_notifier_list, link)
+ if (kimn->irq == gsi)
+ kimn->func(kimn, mask);
rcu_read_unlock();
}
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index c82ae249263..b78b794c103 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -5,6 +5,7 @@
* machines without emulation or binary translation.
*
* Copyright (C) 2006 Qumranet, Inc.
+ * Copyright 2010 Red Hat, Inc. and/or its affilates.
*
* Authors:
* Avi Kivity <avi@qumranet.com>
@@ -92,6 +93,12 @@ static bool kvm_rebooting;
static bool largepages_enabled = true;
+static struct page *hwpoison_page;
+static pfn_t hwpoison_pfn;
+
+static struct page *fault_page;
+static pfn_t fault_pfn;
+
inline int kvm_is_mmio_pfn(pfn_t pfn)
{
if (pfn_valid(pfn)) {
@@ -141,7 +148,7 @@ static bool make_all_cpus_request(struct kvm *kvm, unsigned int req)
raw_spin_lock(&kvm->requests_lock);
me = smp_processor_id();
kvm_for_each_vcpu(i, vcpu, kvm) {
- if (test_and_set_bit(req, &vcpu->requests))
+ if (kvm_make_check_request(req, vcpu))
continue;
cpu = vcpu->cpu;
if (cpus != NULL && cpu != -1 && cpu != me)
@@ -422,9 +429,6 @@ static struct kvm *kvm_create_vm(void)
spin_lock(&kvm_lock);
list_add(&kvm->vm_list, &vm_list);
spin_unlock(&kvm_lock);
-#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
- kvm_coalesced_mmio_init(kvm);
-#endif
out:
return kvm;
@@ -560,11 +564,16 @@ int __kvm_set_memory_region(struct kvm *kvm,
base_gfn = mem->guest_phys_addr >> PAGE_SHIFT;
npages = mem->memory_size >> PAGE_SHIFT;
+ r = -EINVAL;
+ if (npages > KVM_MEM_MAX_NR_PAGES)
+ goto out;
+
if (!npages)
mem->flags &= ~KVM_MEM_LOG_DIRTY_PAGES;
new = old = *memslot;
+ new.id = mem->slot;
new.base_gfn = base_gfn;
new.npages = npages;
new.flags = mem->flags;
@@ -595,7 +604,7 @@ int __kvm_set_memory_region(struct kvm *kvm,
/* Allocate if a slot is being created */
#ifndef CONFIG_S390
if (npages && !new.rmap) {
- new.rmap = vmalloc(npages * sizeof(struct page *));
+ new.rmap = vmalloc(npages * sizeof(*new.rmap));
if (!new.rmap)
goto out_free;
@@ -620,9 +629,9 @@ int __kvm_set_memory_region(struct kvm *kvm,
if (new.lpage_info[i])
continue;
- lpages = 1 + (base_gfn + npages - 1) /
- KVM_PAGES_PER_HPAGE(level);
- lpages -= base_gfn / KVM_PAGES_PER_HPAGE(level);
+ lpages = 1 + ((base_gfn + npages - 1)
+ >> KVM_HPAGE_GFN_SHIFT(level));
+ lpages -= base_gfn >> KVM_HPAGE_GFN_SHIFT(level);
new.lpage_info[i] = vmalloc(lpages * sizeof(*new.lpage_info[i]));
@@ -632,9 +641,9 @@ int __kvm_set_memory_region(struct kvm *kvm,
memset(new.lpage_info[i], 0,
lpages * sizeof(*new.lpage_info[i]));
- if (base_gfn % KVM_PAGES_PER_HPAGE(level))
+ if (base_gfn & (KVM_PAGES_PER_HPAGE(level) - 1))
new.lpage_info[i][0].write_count = 1;
- if ((base_gfn+npages) % KVM_PAGES_PER_HPAGE(level))
+ if ((base_gfn+npages) & (KVM_PAGES_PER_HPAGE(level) - 1))
new.lpage_info[i][lpages - 1].write_count = 1;
ugfn = new.userspace_addr >> PAGE_SHIFT;
/*
@@ -809,16 +818,28 @@ EXPORT_SYMBOL_GPL(kvm_disable_largepages);
int is_error_page(struct page *page)
{
- return page == bad_page;
+ return page == bad_page || page == hwpoison_page || page == fault_page;
}
EXPORT_SYMBOL_GPL(is_error_page);
int is_error_pfn(pfn_t pfn)
{
- return pfn == bad_pfn;
+ return pfn == bad_pfn || pfn == hwpoison_pfn || pfn == fault_pfn;
}
EXPORT_SYMBOL_GPL(is_error_pfn);
+int is_hwpoison_pfn(pfn_t pfn)
+{
+ return pfn == hwpoison_pfn;
+}
+EXPORT_SYMBOL_GPL(is_hwpoison_pfn);
+
+int is_fault_pfn(pfn_t pfn)
+{
+ return pfn == fault_pfn;
+}
+EXPORT_SYMBOL_GPL(is_fault_pfn);
+
static inline unsigned long bad_hva(void)
{
return PAGE_OFFSET;
@@ -830,10 +851,10 @@ int kvm_is_error_hva(unsigned long addr)
}
EXPORT_SYMBOL_GPL(kvm_is_error_hva);
-struct kvm_memory_slot *gfn_to_memslot_unaliased(struct kvm *kvm, gfn_t gfn)
+struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
{
int i;
- struct kvm_memslots *slots = rcu_dereference(kvm->memslots);
+ struct kvm_memslots *slots = kvm_memslots(kvm);
for (i = 0; i < slots->nmemslots; ++i) {
struct kvm_memory_slot *memslot = &slots->memslots[i];
@@ -844,20 +865,13 @@ struct kvm_memory_slot *gfn_to_memslot_unaliased(struct kvm *kvm, gfn_t gfn)
}
return NULL;
}
-EXPORT_SYMBOL_GPL(gfn_to_memslot_unaliased);
-
-struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
-{
- gfn = unalias_gfn(kvm, gfn);
- return gfn_to_memslot_unaliased(kvm, gfn);
-}
+EXPORT_SYMBOL_GPL(gfn_to_memslot);
int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn)
{
int i;
- struct kvm_memslots *slots = rcu_dereference(kvm->memslots);
+ struct kvm_memslots *slots = kvm_memslots(kvm);
- gfn = unalias_gfn_instantiation(kvm, gfn);
for (i = 0; i < KVM_MEMORY_SLOTS; ++i) {
struct kvm_memory_slot *memslot = &slots->memslots[i];
@@ -899,10 +913,9 @@ out:
int memslot_id(struct kvm *kvm, gfn_t gfn)
{
int i;
- struct kvm_memslots *slots = rcu_dereference(kvm->memslots);
+ struct kvm_memslots *slots = kvm_memslots(kvm);
struct kvm_memory_slot *memslot = NULL;
- gfn = unalias_gfn(kvm, gfn);
for (i = 0; i < slots->nmemslots; ++i) {
memslot = &slots->memslots[i];
@@ -914,15 +927,19 @@ int memslot_id(struct kvm *kvm, gfn_t gfn)
return memslot - slots->memslots;
}
+static unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn)
+{
+ return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
+}
+
unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn)
{
struct kvm_memory_slot *slot;
- gfn = unalias_gfn_instantiation(kvm, gfn);
- slot = gfn_to_memslot_unaliased(kvm, gfn);
+ slot = gfn_to_memslot(kvm, gfn);
if (!slot || slot->flags & KVM_MEMSLOT_INVALID)
return bad_hva();
- return (slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE);
+ return gfn_to_hva_memslot(slot, gfn);
}
EXPORT_SYMBOL_GPL(gfn_to_hva);
@@ -940,13 +957,19 @@ static pfn_t hva_to_pfn(struct kvm *kvm, unsigned long addr)
struct vm_area_struct *vma;
down_read(&current->mm->mmap_sem);
+ if (is_hwpoison_address(addr)) {
+ up_read(&current->mm->mmap_sem);
+ get_page(hwpoison_page);
+ return page_to_pfn(hwpoison_page);
+ }
+
vma = find_vma(current->mm, addr);
if (vma == NULL || addr < vma->vm_start ||
!(vma->vm_flags & VM_PFNMAP)) {
up_read(&current->mm->mmap_sem);
- get_page(bad_page);
- return page_to_pfn(bad_page);
+ get_page(fault_page);
+ return page_to_pfn(fault_page);
}
pfn = ((addr - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff;
@@ -972,11 +995,6 @@ pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn)
}
EXPORT_SYMBOL_GPL(gfn_to_pfn);
-static unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn)
-{
- return (slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE);
-}
-
pfn_t gfn_to_pfn_memslot(struct kvm *kvm,
struct kvm_memory_slot *slot, gfn_t gfn)
{
@@ -1186,17 +1204,11 @@ void mark_page_dirty(struct kvm *kvm, gfn_t gfn)
{
struct kvm_memory_slot *memslot;
- gfn = unalias_gfn(kvm, gfn);
- memslot = gfn_to_memslot_unaliased(kvm, gfn);
+ memslot = gfn_to_memslot(kvm, gfn);
if (memslot && memslot->dirty_bitmap) {
unsigned long rel_gfn = gfn - memslot->base_gfn;
- unsigned long *p = memslot->dirty_bitmap +
- rel_gfn / BITS_PER_LONG;
- int offset = rel_gfn % BITS_PER_LONG;
- /* avoid RMW */
- if (!generic_test_le_bit(offset, p))
- generic___set_le_bit(offset, p);
+ generic___set_le_bit(rel_gfn, memslot->dirty_bitmap);
}
}
@@ -1211,7 +1223,7 @@ void kvm_vcpu_block(struct kvm_vcpu *vcpu)
prepare_to_wait(&vcpu->wq, &wait, TASK_INTERRUPTIBLE);
if (kvm_arch_vcpu_runnable(vcpu)) {
- set_bit(KVM_REQ_UNHALT, &vcpu->requests);
+ kvm_make_request(KVM_REQ_UNHALT, vcpu);
break;
}
if (kvm_cpu_has_pending_timer(vcpu))
@@ -1382,6 +1394,18 @@ static long kvm_vcpu_ioctl(struct file *filp,
if (vcpu->kvm->mm != current->mm)
return -EIO;
+
+#if defined(CONFIG_S390) || defined(CONFIG_PPC)
+ /*
+ * Special cases: vcpu ioctls that are asynchronous to vcpu execution,
+ * so vcpu_load() would break it.
+ */
+ if (ioctl == KVM_S390_INTERRUPT || ioctl == KVM_INTERRUPT)
+ return kvm_arch_vcpu_ioctl(filp, ioctl, arg);
+#endif
+
+
+ vcpu_load(vcpu);
switch (ioctl) {
case KVM_RUN:
r = -EINVAL;
@@ -1524,7 +1548,7 @@ out_free2:
goto out;
p = &sigset;
}
- r = kvm_vcpu_ioctl_set_sigmask(vcpu, &sigset);
+ r = kvm_vcpu_ioctl_set_sigmask(vcpu, p);
break;
}
case KVM_GET_FPU: {
@@ -1559,6 +1583,7 @@ out_free2:
r = kvm_arch_vcpu_ioctl(filp, ioctl, arg);
}
out:
+ vcpu_put(vcpu);
kfree(fpu);
kfree(kvm_sregs);
return r;
@@ -1609,7 +1634,6 @@ static long kvm_vm_ioctl(struct file *filp,
r = -EFAULT;
if (copy_from_user(&zone, argp, sizeof zone))
goto out;
- r = -ENXIO;
r = kvm_vm_ioctl_register_coalesced_mmio(kvm, &zone);
if (r)
goto out;
@@ -1621,7 +1645,6 @@ static long kvm_vm_ioctl(struct file *filp,
r = -EFAULT;
if (copy_from_user(&zone, argp, sizeof zone))
goto out;
- r = -ENXIO;
r = kvm_vm_ioctl_unregister_coalesced_mmio(kvm, &zone);
if (r)
goto out;
@@ -1755,12 +1778,19 @@ static struct file_operations kvm_vm_fops = {
static int kvm_dev_ioctl_create_vm(void)
{
- int fd;
+ int fd, r;
struct kvm *kvm;
kvm = kvm_create_vm();
if (IS_ERR(kvm))
return PTR_ERR(kvm);
+#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
+ r = kvm_coalesced_mmio_init(kvm);
+ if (r < 0) {
+ kvm_put_kvm(kvm);
+ return r;
+ }
+#endif
fd = anon_inode_getfd("kvm-vm", &kvm_vm_fops, kvm, O_RDWR);
if (fd < 0)
kvm_put_kvm(kvm);
@@ -1928,11 +1958,6 @@ static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val,
cpu);
hardware_disable(NULL);
break;
- case CPU_UP_CANCELED:
- printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n",
- cpu);
- smp_call_function_single(cpu, hardware_disable, NULL, 1);
- break;
case CPU_ONLINE:
printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n",
cpu);
@@ -1991,7 +2016,9 @@ int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
int len, const void *val)
{
int i;
- struct kvm_io_bus *bus = rcu_dereference(kvm->buses[bus_idx]);
+ struct kvm_io_bus *bus;
+
+ bus = srcu_dereference(kvm->buses[bus_idx], &kvm->srcu);
for (i = 0; i < bus->dev_count; i++)
if (!kvm_iodevice_write(bus->devs[i], addr, len, val))
return 0;
@@ -2003,8 +2030,9 @@ int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
int len, void *val)
{
int i;
- struct kvm_io_bus *bus = rcu_dereference(kvm->buses[bus_idx]);
+ struct kvm_io_bus *bus;
+ bus = srcu_dereference(kvm->buses[bus_idx], &kvm->srcu);
for (i = 0; i < bus->dev_count; i++)
if (!kvm_iodevice_read(bus->devs[i], addr, len, val))
return 0;
@@ -2179,7 +2207,7 @@ static void kvm_sched_out(struct preempt_notifier *pn,
kvm_arch_vcpu_put(vcpu);
}
-int kvm_init(void *opaque, unsigned int vcpu_size,
+int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
struct module *module)
{
int r;
@@ -2198,6 +2226,24 @@ int kvm_init(void *opaque, unsigned int vcpu_size,
bad_pfn = page_to_pfn(bad_page);
+ hwpoison_page = alloc_page(GFP_KERNEL | __GFP_ZERO);
+
+ if (hwpoison_page == NULL) {
+ r = -ENOMEM;
+ goto out_free_0;
+ }
+
+ hwpoison_pfn = page_to_pfn(hwpoison_page);
+
+ fault_page = alloc_page(GFP_KERNEL | __GFP_ZERO);
+
+ if (fault_page == NULL) {
+ r = -ENOMEM;
+ goto out_free_0;
+ }
+
+ fault_pfn = page_to_pfn(fault_page);
+
if (!zalloc_cpumask_var(&cpus_hardware_enabled, GFP_KERNEL)) {
r = -ENOMEM;
goto out_free_0;
@@ -2229,8 +2275,9 @@ int kvm_init(void *opaque, unsigned int vcpu_size,
goto out_free_4;
/* A kmem cache lets us meet the alignment requirements of fx_save. */
- kvm_vcpu_cache = kmem_cache_create("kvm_vcpu", vcpu_size,
- __alignof__(struct kvm_vcpu),
+ if (!vcpu_align)
+ vcpu_align = __alignof__(struct kvm_vcpu);
+ kvm_vcpu_cache = kmem_cache_create("kvm_vcpu", vcpu_size, vcpu_align,
0, NULL);
if (!kvm_vcpu_cache) {
r = -ENOMEM;
@@ -2269,6 +2316,10 @@ out_free_1:
out_free_0a:
free_cpumask_var(cpus_hardware_enabled);
out_free_0:
+ if (fault_page)
+ __free_page(fault_page);
+ if (hwpoison_page)
+ __free_page(hwpoison_page);
__free_page(bad_page);
out:
kvm_arch_exit();
@@ -2279,7 +2330,6 @@ EXPORT_SYMBOL_GPL(kvm_init);
void kvm_exit(void)
{
- tracepoint_synchronize_unregister();
kvm_exit_debug();
misc_deregister(&kvm_dev);
kmem_cache_destroy(kvm_vcpu_cache);
@@ -2291,6 +2341,7 @@ void kvm_exit(void)
kvm_arch_hardware_unsetup();
kvm_arch_exit();
free_cpumask_var(cpus_hardware_enabled);
+ __free_page(hwpoison_page);
__free_page(bad_page);
}
EXPORT_SYMBOL_GPL(kvm_exit);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-02-03 09:40:49 +0000