From: Marcelo Tosatti <mtosatti@redhat.com>
To: kvm@vger.kernel.org
Cc: avi@redhat.com, Marcelo Tosatti <mtosatti@redhat.com>
Subject: [patch 01/10] KVM: modify memslots layout in struct kvm
Date: Mon, 21 Sep 2009 20:37:12 -0300 [thread overview]
Message-ID: <20090921234124.039344897@amt.cnet> (raw)
In-Reply-To: 20090921233711.213665413@amt.cnet
[-- Attachment #1: modify-memslot-layout --]
[-- Type: text/plain, Size: 8597 bytes --]
Have a pointer to an allocated region inside struct kvm.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Index: kvm-slotslock/arch/x86/kvm/mmu.c
===================================================================
--- kvm-slotslock.orig/arch/x86/kvm/mmu.c
+++ kvm-slotslock/arch/x86/kvm/mmu.c
@@ -768,13 +768,14 @@ static int kvm_handle_hva(struct kvm *kv
{
int i, j;
int retval = 0;
+ struct kvm_memslots *slots = kvm->memslots;
/*
* If mmap_sem isn't taken, we can look the memslots with only
* the mmu_lock by skipping over the slots with userspace_addr == 0.
*/
- for (i = 0; i < kvm->nmemslots; i++) {
- struct kvm_memory_slot *memslot = &kvm->memslots[i];
+ for (i = 0; i < slots->nmemslots; i++) {
+ struct kvm_memory_slot *memslot = &slots->memslots[i];
unsigned long start = memslot->userspace_addr;
unsigned long end;
@@ -2969,8 +2970,8 @@ unsigned int kvm_mmu_calculate_mmu_pages
unsigned int nr_mmu_pages;
unsigned int nr_pages = 0;
- for (i = 0; i < kvm->nmemslots; i++)
- nr_pages += kvm->memslots[i].npages;
+ for (i = 0; i < kvm->memslots->nmemslots; i++)
+ nr_pages += kvm->memslots->memslots[i].npages;
nr_mmu_pages = nr_pages * KVM_PERMILLE_MMU_PAGES / 1000;
nr_mmu_pages = max(nr_mmu_pages,
@@ -3243,7 +3244,7 @@ static int count_rmaps(struct kvm_vcpu *
int i, j, k;
for (i = 0; i < KVM_MEMORY_SLOTS; ++i) {
- struct kvm_memory_slot *m = &vcpu->kvm->memslots[i];
+ struct kvm_memory_slot *m = &vcpu->kvm->memslots->memslots[i];
struct kvm_rmap_desc *d;
for (j = 0; j < m->npages; ++j) {
Index: kvm-slotslock/arch/x86/kvm/vmx.c
===================================================================
--- kvm-slotslock.orig/arch/x86/kvm/vmx.c
+++ kvm-slotslock/arch/x86/kvm/vmx.c
@@ -1465,8 +1465,8 @@ static void enter_pmode(struct kvm_vcpu
static gva_t rmode_tss_base(struct kvm *kvm)
{
if (!kvm->arch.tss_addr) {
- gfn_t base_gfn = kvm->memslots[0].base_gfn +
- kvm->memslots[0].npages - 3;
+ gfn_t base_gfn = kvm->memslots->memslots[0].base_gfn +
+ kvm->memslots->memslots[0].npages - 3;
return base_gfn << PAGE_SHIFT;
}
return kvm->arch.tss_addr;
Index: kvm-slotslock/arch/x86/kvm/x86.c
===================================================================
--- kvm-slotslock.orig/arch/x86/kvm/x86.c
+++ kvm-slotslock/arch/x86/kvm/x86.c
@@ -2159,7 +2159,7 @@ int kvm_vm_ioctl_get_dirty_log(struct kv
spin_lock(&kvm->mmu_lock);
kvm_mmu_slot_remove_write_access(kvm, log->slot);
spin_unlock(&kvm->mmu_lock);
- memslot = &kvm->memslots[log->slot];
+ memslot = &kvm->memslots->memslots[log->slot];
n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;
memset(memslot->dirty_bitmap, 0, n);
}
@@ -4845,7 +4845,7 @@ int kvm_arch_set_memory_region(struct kv
int user_alloc)
{
int npages = mem->memory_size >> PAGE_SHIFT;
- struct kvm_memory_slot *memslot = &kvm->memslots[mem->slot];
+ struct kvm_memory_slot *memslot = &kvm->memslots->memslots[mem->slot];
/*To keep backward compatibility with older userspace,
*x86 needs to hanlde !user_alloc case.
Index: kvm-slotslock/include/linux/kvm_host.h
===================================================================
--- kvm-slotslock.orig/include/linux/kvm_host.h
+++ kvm-slotslock/include/linux/kvm_host.h
@@ -151,14 +151,18 @@ struct kvm_irq_routing_table {};
#endif
+struct kvm_memslots {
+ int nmemslots;
+ struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
+ KVM_PRIVATE_MEM_SLOTS];
+};
+
struct kvm {
spinlock_t mmu_lock;
spinlock_t requests_lock;
struct rw_semaphore slots_lock;
struct mm_struct *mm; /* userspace tied to this vm */
- int nmemslots;
- struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
- KVM_PRIVATE_MEM_SLOTS];
+ struct kvm_memslots *memslots;
#ifdef CONFIG_KVM_APIC_ARCHITECTURE
u32 bsp_vcpu_id;
struct kvm_vcpu *bsp_vcpu;
@@ -482,7 +486,7 @@ static inline void kvm_guest_exit(void)
static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
{
- return slot - kvm->memslots;
+ return slot - kvm->memslots->memslots;
}
static inline gpa_t gfn_to_gpa(gfn_t gfn)
Index: kvm-slotslock/virt/kvm/iommu.c
===================================================================
--- kvm-slotslock.orig/virt/kvm/iommu.c
+++ kvm-slotslock/virt/kvm/iommu.c
@@ -76,10 +76,13 @@ unmap_pages:
static int kvm_iommu_map_memslots(struct kvm *kvm)
{
int i, r = 0;
+ struct kvm_memslots *slots;
- for (i = 0; i < kvm->nmemslots; i++) {
- r = kvm_iommu_map_pages(kvm, kvm->memslots[i].base_gfn,
- kvm->memslots[i].npages);
+ slots = kvm->memslots;
+
+ for (i = 0; i < slots->nmemslots; i++) {
+ r = kvm_iommu_map_pages(kvm, slots->memslots[i].base_gfn,
+ slots->memslots[i].npages);
if (r)
break;
}
@@ -210,10 +213,13 @@ static void kvm_iommu_put_pages(struct k
static int kvm_iommu_unmap_memslots(struct kvm *kvm)
{
int i;
+ struct kvm_memslots *slots;
+
+ slots = kvm->memslots;
- for (i = 0; i < kvm->nmemslots; i++) {
- kvm_iommu_put_pages(kvm, kvm->memslots[i].base_gfn,
- kvm->memslots[i].npages);
+ for (i = 0; i < slots->nmemslots; i++) {
+ kvm_iommu_put_pages(kvm, slots->memslots[i].base_gfn,
+ slots->memslots[i].npages);
}
return 0;
Index: kvm-slotslock/virt/kvm/kvm_main.c
===================================================================
--- kvm-slotslock.orig/virt/kvm/kvm_main.c
+++ kvm-slotslock/virt/kvm/kvm_main.c
@@ -348,12 +348,16 @@ static struct kvm *kvm_create_vm(void)
INIT_HLIST_HEAD(&kvm->irq_ack_notifier_list);
#endif
+ r = -ENOMEM;
+ kvm->memslots = kzalloc(sizeof(struct kvm_memslots), GFP_KERNEL);
+ if (!kvm->memslots)
+ goto out_err;
+
#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
page = alloc_page(GFP_KERNEL | __GFP_ZERO);
- if (!page) {
- r = -ENOMEM;
+ if (!page)
goto out_err;
- }
+
kvm->coalesced_mmio_ring =
(struct kvm_coalesced_mmio_ring *)page_address(page);
#endif
@@ -394,6 +398,7 @@ out:
out_err:
hardware_disable_all();
out_err_nodisable:
+ kfree(kvm->memslots);
kfree(kvm);
return ERR_PTR(r);
}
@@ -428,9 +433,12 @@ static void kvm_free_physmem_slot(struct
void kvm_free_physmem(struct kvm *kvm)
{
int i;
+ struct kvm_memslots *slots = kvm->memslots;
+
+ for (i = 0; i < slots->nmemslots; ++i)
+ kvm_free_physmem_slot(&slots->memslots[i], NULL);
- for (i = 0; i < kvm->nmemslots; ++i)
- kvm_free_physmem_slot(&kvm->memslots[i], NULL);
+ kfree(kvm->memslots);
}
static void kvm_destroy_vm(struct kvm *kvm)
@@ -514,7 +522,7 @@ int __kvm_set_memory_region(struct kvm *
if (mem->guest_phys_addr + mem->memory_size < mem->guest_phys_addr)
goto out;
- memslot = &kvm->memslots[mem->slot];
+ memslot = &kvm->memslots->memslots[mem->slot];
base_gfn = mem->guest_phys_addr >> PAGE_SHIFT;
npages = mem->memory_size >> PAGE_SHIFT;
@@ -535,7 +543,7 @@ int __kvm_set_memory_region(struct kvm *
/* Check for overlaps */
r = -EEXIST;
for (i = 0; i < KVM_MEMORY_SLOTS; ++i) {
- struct kvm_memory_slot *s = &kvm->memslots[i];
+ struct kvm_memory_slot *s = &kvm->memslots->memslots[i];
if (s == memslot || !s->npages)
continue;
@@ -637,8 +645,8 @@ skip_lpage:
kvm_arch_flush_shadow(kvm);
spin_lock(&kvm->mmu_lock);
- if (mem->slot >= kvm->nmemslots)
- kvm->nmemslots = mem->slot + 1;
+ if (mem->slot >= kvm->memslots->nmemslots)
+ kvm->memslots->nmemslots = mem->slot + 1;
*memslot = new;
spin_unlock(&kvm->mmu_lock);
@@ -708,7 +716,7 @@ int kvm_get_dirty_log(struct kvm *kvm,
if (log->slot >= KVM_MEMORY_SLOTS)
goto out;
- memslot = &kvm->memslots[log->slot];
+ memslot = &kvm->memslots->memslots[log->slot];
r = -ENOENT;
if (!memslot->dirty_bitmap)
goto out;
@@ -762,9 +770,10 @@ EXPORT_SYMBOL_GPL(kvm_is_error_hva);
struct kvm_memory_slot *gfn_to_memslot_unaliased(struct kvm *kvm, gfn_t gfn)
{
int i;
+ struct kvm_memslots *slots = kvm->memslots;
- for (i = 0; i < kvm->nmemslots; ++i) {
- struct kvm_memory_slot *memslot = &kvm->memslots[i];
+ for (i = 0; i < slots->nmemslots; ++i) {
+ struct kvm_memory_slot *memslot = &slots->memslots[i];
if (gfn >= memslot->base_gfn
&& gfn < memslot->base_gfn + memslot->npages)
@@ -783,10 +792,11 @@ struct kvm_memory_slot *gfn_to_memslot(s
int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn)
{
int i;
+ struct kvm_memslots *slots = kvm->memslots;
gfn = unalias_gfn(kvm, gfn);
for (i = 0; i < KVM_MEMORY_SLOTS; ++i) {
- struct kvm_memory_slot *memslot = &kvm->memslots[i];
+ struct kvm_memory_slot *memslot = &slots->memslots[i];
if (gfn >= memslot->base_gfn
&& gfn < memslot->base_gfn + memslot->npages)
next prev parent reply other threads:[~2009-09-21 23:42 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-21 23:37 [patch 00/10] RFC: switch vcpu context to use SRCU Marcelo Tosatti
2009-09-21 23:37 ` Marcelo Tosatti [this message]
2009-09-21 23:37 ` [patch 02/10] KVM: modify alias layout in x86s struct kvm_arch Marcelo Tosatti
2009-09-21 23:37 ` [patch 03/10] KVM: switch dirty_log to mmu_lock protection Marcelo Tosatti
2009-09-22 6:37 ` Avi Kivity
2009-09-22 12:44 ` Marcelo Tosatti
2009-09-22 12:52 ` Avi Kivity
2009-09-21 23:37 ` [patch 04/10] KVM: split kvm_arch_set_memory_region into prepare and commit Marcelo Tosatti
2009-09-22 6:40 ` Avi Kivity
2009-09-21 23:37 ` [patch 05/10] KVM: introduce gfn_to_pfn_memslot Marcelo Tosatti
2009-09-21 23:37 ` [patch 06/10] KVM: use gfn_to_pfn_memslot in kvm_iommu_map_pages Marcelo Tosatti
2009-09-21 23:37 ` [patch 07/10] KVM: introduce kvm->srcu and convert kvm_set_memory_region to SRCU update Marcelo Tosatti
2009-09-22 6:59 ` Avi Kivity
2009-09-22 16:16 ` Marcelo Tosatti
2009-09-22 10:40 ` Fernando Carrijo
2009-09-22 12:55 ` Marcelo Tosatti
2009-09-24 14:06 ` Marcelo Tosatti
2009-09-24 17:28 ` Paul E. McKenney
2009-09-24 18:05 ` Marcelo Tosatti
2009-09-25 15:05 ` Avi Kivity
2009-09-21 23:37 ` [patch 08/10] KVM: x86: switch kvm_set_memory_alias " Marcelo Tosatti
2009-09-22 7:04 ` Avi Kivity
2009-09-21 23:37 ` [patch 09/10] KVM: convert io_bus to SRCU Marcelo Tosatti
2009-09-21 23:37 ` [patch 10/10] KVM: switch vcpu context to use SRCU Marcelo Tosatti
2009-09-22 7:07 ` Avi Kivity
2009-09-22 7:09 ` [patch 00/10] RFC: " Avi Kivity
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