Signed-off-by: Paolo Bonzini pbonz...@redhat.com
---
v1-v2: new
Documentation/virtual/kvm/api.txt| 12 ++
arch/powerpc/include/asm/kvm_book3s_64.h | 2 +-
include/linux/kvm_host.h | 26 ++--
include/uapi/linux/kvm.h | 1 +
virt/kvm/kvm_main.c | 70
5 files changed, 79 insertions(+), 32 deletions(-)
diff --git a/Documentation/virtual/kvm/api.txt
b/Documentation/virtual/kvm/api.txt
index 51523b70b6b2..91ab5f2354aa 100644
--- a/Documentation/virtual/kvm/api.txt
+++ b/Documentation/virtual/kvm/api.txt
@@ -254,6 +254,11 @@ since the last call to this ioctl. Bit 0 is the first
page in the
memory slot. Ensure the entire structure is cleared to avoid padding
issues.
+If KVM_CAP_MULTI_ADDRESS_SPACE is available, bits 16-31 specifies
+the address space for which you want to return the dirty bitmap.
+They must be less than the value that KVM_CHECK_EXTENSION returns for
+the KVM_CAP_MULTI_ADDRESS_SPACE capability.
+
4.9 KVM_SET_MEMORY_ALIAS
@@ -924,6 +929,13 @@ slot. When changing an existing slot, it may be moved in
the guest
physical memory space, or its flags may be modified. It may not be
resized. Slots may not overlap in guest physical address space.
+If KVM_CAP_MULTI_ADDRESS_SPACE is available, bits 16-31 of slot
+specifies the address space which is being modified. They must be
+less than the value that KVM_CHECK_EXTENSION returns for the
+KVM_CAP_MULTI_ADDRESS_SPACE capability. Slots in separate address spaces
+are unrelated; the restriction on overlapping slots only applies within
+each address space.
+
Memory for the region is taken starting at the address denoted by the
field userspace_addr, which must point at user addressable memory for
the entire memory slot size. Any object may back this memory, including
diff --git a/arch/powerpc/include/asm/kvm_book3s_64.h
b/arch/powerpc/include/asm/kvm_book3s_64.h
index 3536d12eb798..2aa79c864e91 100644
--- a/arch/powerpc/include/asm/kvm_book3s_64.h
+++ b/arch/powerpc/include/asm/kvm_book3s_64.h
@@ -430,7 +430,7 @@ static inline void note_hpte_modification(struct kvm *kvm,
*/
static inline struct kvm_memslots *kvm_memslots_raw(struct kvm *kvm)
{
- return rcu_dereference_raw_notrace(kvm-memslots);
+ return rcu_dereference_raw_notrace(kvm-memslots[0]);
}
extern void kvmppc_mmu_debugfs_init(struct kvm *kvm);
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index ba1ea43998e4..9564fd78c547 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -44,6 +44,10 @@
/* Two fragments for cross MMIO pages. */
#define KVM_MAX_MMIO_FRAGMENTS 2
+#ifndef KVM_ADDRESS_SPACE_NUM
+#define KVM_ADDRESS_SPACE_NUM 1
+#endif
+
/*
* For the normal pfn, the highest 12 bits should be zero,
* so we can mask bit 62 ~ bit 52 to indicate the error pfn,
@@ -331,6 +335,13 @@ struct kvm_kernel_irq_routing_entry {
#define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS)
#endif
+#ifndef __KVM_VCPU_MULTIPLE_ADDRESS_SPACE
+static inline int kvm_arch_vcpu_memslots_id(struct kvm_vcpu *vcpu)
+{
+ return 0;
+}
+#endif
+
/*
* Note:
* memslots are not sorted by id anymore, please use id_to_memslot()
@@ -349,7 +360,7 @@ struct kvm {
spinlock_t mmu_lock;
struct mutex slots_lock;
struct mm_struct *mm; /* userspace tied to this vm */
- struct kvm_memslots *memslots;
+ struct kvm_memslots *memslots[KVM_ADDRESS_SPACE_NUM];
struct srcu_struct srcu;
struct srcu_struct irq_srcu;
#ifdef CONFIG_KVM_APIC_ARCHITECTURE
@@ -464,16 +475,23 @@ void kvm_exit(void);
void kvm_get_kvm(struct kvm *kvm);
void kvm_put_kvm(struct kvm *kvm);
-static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
+static inline struct kvm_memslots *__kvm_memslots(struct kvm *kvm, int as_id)
{
- return rcu_dereference_check(kvm-memslots,
+ return rcu_dereference_check(kvm-memslots[as_id],
srcu_read_lock_held(kvm-srcu)
|| lockdep_is_held(kvm-slots_lock));
}
+static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
+{
+ return __kvm_memslots(kvm, 0);
+}
+
static inline struct kvm_memslots *kvm_vcpu_memslots(struct kvm_vcpu *vcpu)
{
- return kvm_memslots(vcpu-kvm);
+ int as_id = kvm_arch_vcpu_memslots_id(vcpu);
+
+ return __kvm_memslots(vcpu-kvm, as_id);
}
static inline struct kvm_memory_slot *
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index eace8babd227..5ff1038437e3 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -816,6 +816,7 @@ struct kvm_ppc_smmu_info {
#define KVM_CAP_PPC_HWRNG 115
#define KVM_CAP_DISABLE_QUIRKS 116
#define KVM_CAP_X86_SMM 117
+#define KVM_CAP_MULTI_ADDRESS_SPACE 118
#ifdef KVM_CAP_IRQ_ROUTING
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 9ef1a7e3c050..10ae7e348dcc
