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authorPaolo Bonzini <pbonzini@redhat.com>2015-05-17 17:30:37 +0200
committerPaolo Bonzini <pbonzini@redhat.com>2015-06-05 17:26:35 +0200
commitf481b069e674378758c73761827e83ab05c46b52 (patch)
tree5f6ee0f8820e320f127fb7a23dd3ba28d5965302 /include/linux/kvm_host.h
parent8e73485c7959fd25650761eab04db1e72ea14c23 (diff)
downloadop-kernel-dev-f481b069e674378758c73761827e83ab05c46b52.zip
op-kernel-dev-f481b069e674378758c73761827e83ab05c46b52.tar.gz
KVM: implement multiple address spaces
Only two ioctls have to be modified; the address space id is placed in the higher 16 bits of their slot id argument. As of this patch, no architecture defines more than one address space; x86 will be the first. Reviewed-by: Radim Krčmář <rkrcmar@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'include/linux/kvm_host.h')
-rw-r--r--include/linux/kvm_host.h26
1 files changed, 22 insertions, 4 deletions
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index ba1ea43..9564fd7 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 *
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