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authorPaolo Bonzini <pbonzini@redhat.com>2015-04-02 11:20:48 +0200
committerPaolo Bonzini <pbonzini@redhat.com>2015-05-19 20:52:45 +0200
commit3520469d65f26a1cd2f610f5d5de976f78db74fe (patch)
tree2b3ab1f42a0168b238662fd9252e94a269acc550
parent69a1220060c1523fd0515216eaa29e22f133b894 (diff)
KVM: export __gfn_to_pfn_memslot, drop gfn_to_pfn_async
gfn_to_pfn_async is used in just one place, and because of x86-specific treatment that place will need to look at the memory slot. Hence inline it into try_async_pf and export __gfn_to_pfn_memslot. The patch also switches the subsequent call to gfn_to_pfn_prot to use __gfn_to_pfn_memslot. This is a small optimization. Finally, remove the now-unused async argument of __gfn_to_pfn. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
-rw-r--r--arch/x86/kvm/mmu.c9
-rw-r--r--include/linux/kvm_host.h4
-rw-r--r--virt/kvm/kvm_main.c26
3 files changed, 15 insertions, 24 deletions
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 5bebec1191f1..49c34e632b91 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -3511,10 +3511,12 @@ static bool can_do_async_pf(struct kvm_vcpu *vcpu)
static bool try_async_pf(struct kvm_vcpu *vcpu, bool prefault, gfn_t gfn,
gva_t gva, pfn_t *pfn, bool write, bool *writable)
{
+ struct kvm_memory_slot *slot;
bool async;
- *pfn = gfn_to_pfn_async(vcpu->kvm, gfn, &async, write, writable);
-
+ slot = gfn_to_memslot(vcpu->kvm, gfn);
+ async = false;
+ *pfn = __gfn_to_pfn_memslot(slot, gfn, false, &async, write, writable);
if (!async)
return false; /* *pfn has correct page already */
@@ -3528,8 +3530,7 @@ static bool try_async_pf(struct kvm_vcpu *vcpu, bool prefault, gfn_t gfn,
return true;
}
- *pfn = gfn_to_pfn_prot(vcpu->kvm, gfn, write, writable);
-
+ *pfn = __gfn_to_pfn_memslot(slot, gfn, false, NULL, write, writable);
return false;
}
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index b7a08cd6f4a8..87fd74a04005 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -539,13 +539,13 @@ void kvm_release_page_dirty(struct page *page);
void kvm_set_page_accessed(struct page *page);
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_memory_slot *slot, gfn_t gfn);
pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn);
+pfn_t __gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn, bool atomic,
+ bool *async, bool write_fault, bool *writable);
void kvm_release_pfn_clean(pfn_t pfn);
void kvm_set_pfn_dirty(pfn_t pfn);
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index f202c4035134..bd3c08a7c6c2 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1355,9 +1355,8 @@ exit:
return pfn;
}
-static pfn_t
-__gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn, bool atomic,
- bool *async, bool write_fault, bool *writable)
+pfn_t __gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn, bool atomic,
+ bool *async, bool write_fault, bool *writable)
{
unsigned long addr = __gfn_to_hva_many(slot, gfn, NULL, write_fault);
@@ -1376,44 +1375,35 @@ __gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn, bool atomic,
return hva_to_pfn(addr, atomic, async, write_fault,
writable);
}
+EXPORT_SYMBOL_GPL(__gfn_to_pfn_memslot);
-static pfn_t __gfn_to_pfn(struct kvm *kvm, gfn_t gfn, bool atomic, bool *async,
+static pfn_t __gfn_to_pfn(struct kvm *kvm, gfn_t gfn, bool atomic,
bool write_fault, bool *writable)
{
struct kvm_memory_slot *slot;
- if (async)
- *async = false;
-
slot = gfn_to_memslot(kvm, gfn);
- return __gfn_to_pfn_memslot(slot, gfn, atomic, async, write_fault,
+ return __gfn_to_pfn_memslot(slot, gfn, atomic, NULL, write_fault,
writable);
}
pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn)
{
- return __gfn_to_pfn(kvm, gfn, true, NULL, true, NULL);
+ return __gfn_to_pfn(kvm, gfn, true, true, NULL);
}
EXPORT_SYMBOL_GPL(gfn_to_pfn_atomic);
-pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async,
- bool write_fault, bool *writable)
-{
- return __gfn_to_pfn(kvm, gfn, false, async, write_fault, writable);
-}
-EXPORT_SYMBOL_GPL(gfn_to_pfn_async);
-
pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn)
{
- return __gfn_to_pfn(kvm, gfn, false, NULL, true, NULL);
+ return __gfn_to_pfn(kvm, gfn, false, true, NULL);
}
EXPORT_SYMBOL_GPL(gfn_to_pfn);
pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
bool *writable)
{
- return __gfn_to_pfn(kvm, gfn, false, NULL, write_fault, writable);
+ return __gfn_to_pfn(kvm, gfn, false, write_fault, writable);
}
EXPORT_SYMBOL_GPL(gfn_to_pfn_prot);