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Date: Tue, 16 Apr 2013 14:32:40 +0800
From: Xiao Guangrong <xiaoguangrong@...ux.vnet.ibm.com>
To: mtosatti@...hat.com
Cc: gleb@...hat.com, avi.kivity@...il.com,
linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
Xiao Guangrong <xiaoguangrong@...ux.vnet.ibm.com>
Subject: [PATCH v3 02/15] KVM: fold kvm_arch_create_memslot into kvm_arch_prepare_memory_region
It removes a arch-specified interface and also removes unnecessary
empty functions on some architectures
Signed-off-by: Xiao Guangrong <xiaoguangrong@...ux.vnet.ibm.com>
---
arch/arm/kvm/arm.c | 5 -----
arch/ia64/kvm/kvm-ia64.c | 5 -----
arch/powerpc/kvm/powerpc.c | 8 ++++++--
arch/s390/kvm/kvm-s390.c | 5 -----
arch/x86/kvm/x86.c | 7 ++++++-
include/linux/kvm_host.h | 1 -
virt/kvm/kvm_main.c | 8 ++------
7 files changed, 14 insertions(+), 25 deletions(-)
diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c
index e4ad0bb..c76e63e 100644
--- a/arch/arm/kvm/arm.c
+++ b/arch/arm/kvm/arm.c
@@ -159,11 +159,6 @@ void kvm_arch_free_memslot(struct kvm_memory_slot *free,
{
}
-int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages)
-{
- return 0;
-}
-
/**
* kvm_arch_destroy_vm - destroy the VM data structure
* @kvm: pointer to the KVM struct
diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c
index 7a54455..fcfb03b 100644
--- a/arch/ia64/kvm/kvm-ia64.c
+++ b/arch/ia64/kvm/kvm-ia64.c
@@ -1553,11 +1553,6 @@ void kvm_arch_free_memslot(struct kvm_memory_slot *free,
{
}
-int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages)
-{
- return 0;
-}
-
int kvm_arch_prepare_memory_region(struct kvm *kvm,
struct kvm_memory_slot *memslot,
struct kvm_userspace_memory_region *mem,
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index 16b4595..aab8039 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -405,9 +405,9 @@ void kvm_arch_free_memslot(struct kvm_memory_slot *free,
kvmppc_core_free_memslot(free, dont);
}
-int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages)
+static int kvm_arch_create_memslot(struct kvm_memory_slot *slot)
{
- return kvmppc_core_create_memslot(slot, npages);
+ return kvmppc_core_create_memslot(slot, slot->npages);
}
int kvm_arch_prepare_memory_region(struct kvm *kvm,
@@ -415,6 +415,10 @@ int kvm_arch_prepare_memory_region(struct kvm *kvm,
struct kvm_userspace_memory_region *mem,
enum kvm_mr_change change)
{
+ if (change == KVM_MR_CREATE)
+ if (kvm_arch_create_memslot(memslot))
+ return -ENOMEM;
+
return kvmppc_core_prepare_memory_region(kvm, memslot, mem);
}
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 33161b4..7bfd6f6 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -967,11 +967,6 @@ void kvm_arch_free_memslot(struct kvm_memory_slot *free,
{
}
-int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages)
-{
- return 0;
-}
-
/* Section: memory related */
int kvm_arch_prepare_memory_region(struct kvm *kvm,
struct kvm_memory_slot *memslot,
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index b0be7ec..447789c 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -6875,8 +6875,9 @@ void kvm_arch_free_memslot(struct kvm_memory_slot *free,
}
}
-int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages)
+static int kvm_arch_create_memslot(struct kvm_memory_slot *slot)
{
+ unsigned long npages = slot->npages;
int i;
for (i = 0; i < KVM_NR_PAGE_SIZES; ++i) {
@@ -6938,6 +6939,10 @@ int kvm_arch_prepare_memory_region(struct kvm *kvm,
struct kvm_userspace_memory_region *mem,
enum kvm_mr_change change)
{
+ if (change == KVM_MR_CREATE)
+ if (kvm_arch_create_memslot(memslot))
+ return -ENOMEM;
+
/*
* Only private memory slots need to be mapped here since
* KVM_SET_MEMORY_REGION ioctl is no longer supported.
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 1c0be23..f39ec18 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -493,7 +493,6 @@ int __kvm_set_memory_region(struct kvm *kvm,
struct kvm_userspace_memory_region *mem);
void kvm_arch_free_memslot(struct kvm_memory_slot *free,
struct kvm_memory_slot *dont);
-int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages);
int kvm_arch_prepare_memory_region(struct kvm *kvm,
struct kvm_memory_slot *memslot,
struct kvm_userspace_memory_region *mem,
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index d21694a..acc9f30 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -825,13 +825,9 @@ int __kvm_set_memory_region(struct kvm *kvm,
if (!(new.flags & KVM_MEM_LOG_DIRTY_PAGES))
new.dirty_bitmap = NULL;
- r = -ENOMEM;
- if (change == KVM_MR_CREATE) {
- new.userspace_addr = mem->userspace_addr;
+ new.userspace_addr = mem->userspace_addr;
- if (kvm_arch_create_memslot(&new, npages))
- goto out_free;
- }
+ r = -ENOMEM;
/* Allocate page dirty bitmap if needed */
if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) {
--
1.7.7.6
--
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