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Message-Id: <1431956923-35602-4-git-send-email-pbonzini@redhat.com>
Date: Mon, 18 May 2015 15:48:35 +0200
From: Paolo Bonzini <pbonzini@...hat.com>
To: linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc: Xiao Guangrong <guangrong.xiao@...ux.intel.com>,
rkrcmar@...hat.com, bdas@...hat.com
Subject: [PATCH 03/11] KVM: const-ify uses of struct kvm_userspace_memory_region
Architecture-specific helpers are not supposed to muck with
struct kvm_userspace_memory_region contents. Add const to
enforce this.
Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
---
arch/arm/kvm/mmu.c | 4 ++--
arch/mips/kvm/mips.c | 4 ++--
arch/powerpc/include/asm/kvm_ppc.h | 4 ++--
arch/powerpc/kvm/book3s.c | 4 ++--
arch/powerpc/kvm/book3s_hv.c | 4 ++--
arch/powerpc/kvm/book3s_pr.c | 4 ++--
arch/powerpc/kvm/booke.c | 4 ++--
arch/powerpc/kvm/powerpc.c | 4 ++--
arch/s390/kvm/kvm-s390.c | 4 ++--
arch/x86/kvm/x86.c | 4 ++--
include/linux/kvm_host.h | 8 ++++----
virt/kvm/kvm_main.c | 13 +++++++------
12 files changed, 31 insertions(+), 30 deletions(-)
diff --git a/arch/arm/kvm/mmu.c b/arch/arm/kvm/mmu.c
index 6f0f8f3ac7df..b5c023a37aec 100644
--- a/arch/arm/kvm/mmu.c
+++ b/arch/arm/kvm/mmu.c
@@ -1719,7 +1719,7 @@ out:
}
void kvm_arch_commit_memory_region(struct kvm *kvm,
- struct kvm_userspace_memory_region *mem,
+ const struct kvm_userspace_memory_region *mem,
const struct kvm_memory_slot *old,
enum kvm_mr_change change)
{
@@ -1734,7 +1734,7 @@ void kvm_arch_commit_memory_region(struct kvm *kvm,
int kvm_arch_prepare_memory_region(struct kvm *kvm,
struct kvm_memory_slot *memslot,
- struct kvm_userspace_memory_region *mem,
+ const struct kvm_userspace_memory_region *mem,
enum kvm_mr_change change)
{
hva_t hva = mem->userspace_addr;
diff --git a/arch/mips/kvm/mips.c b/arch/mips/kvm/mips.c
index bc5ddd973b44..5963e2e8a6d7 100644
--- a/arch/mips/kvm/mips.c
+++ b/arch/mips/kvm/mips.c
@@ -198,14 +198,14 @@ int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
int kvm_arch_prepare_memory_region(struct kvm *kvm,
struct kvm_memory_slot *memslot,
- struct kvm_userspace_memory_region *mem,
+ const struct kvm_userspace_memory_region *mem,
enum kvm_mr_change change)
{
return 0;
}
void kvm_arch_commit_memory_region(struct kvm *kvm,
- struct kvm_userspace_memory_region *mem,
+ const struct kvm_userspace_memory_region *mem,
const struct kvm_memory_slot *old,
enum kvm_mr_change change)
{
diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h
index b8475daad884..ebc6bedfc08c 100644
--- a/arch/powerpc/include/asm/kvm_ppc.h
+++ b/arch/powerpc/include/asm/kvm_ppc.h
@@ -182,9 +182,9 @@ extern int kvmppc_core_create_memslot(struct kvm *kvm,
unsigned long npages);
extern int kvmppc_core_prepare_memory_region(struct kvm *kvm,
struct kvm_memory_slot *memslot,
- struct kvm_userspace_memory_region *mem);
+ const struct kvm_userspace_memory_region *mem);
extern void kvmppc_core_commit_memory_region(struct kvm *kvm,
- struct kvm_userspace_memory_region *mem,
+ const struct kvm_userspace_memory_region *mem,
const struct kvm_memory_slot *old);
extern int kvm_vm_ioctl_get_smmu_info(struct kvm *kvm,
struct kvm_ppc_smmu_info *info);
diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c
index 453a8a47a467..60aa0726dccc 100644
--- a/arch/powerpc/kvm/book3s.c
+++ b/arch/powerpc/kvm/book3s.c
@@ -757,13 +757,13 @@ void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot)
int kvmppc_core_prepare_memory_region(struct kvm *kvm,
struct kvm_memory_slot *memslot,
- struct kvm_userspace_memory_region *mem)
+ const struct kvm_userspace_memory_region *mem)
{
return kvm->arch.kvm_ops->prepare_memory_region(kvm, memslot, mem);
}
void kvmppc_core_commit_memory_region(struct kvm *kvm,
- struct kvm_userspace_memory_region *mem,
+ const struct kvm_userspace_memory_region *mem,
const struct kvm_memory_slot *old)
{
kvm->arch.kvm_ops->commit_memory_region(kvm, mem, old);
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 7bc6137ece74..e20d438edb51 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -2375,13 +2375,13 @@ static int kvmppc_core_create_memslot_hv(struct kvm_memory_slot *slot,
static int kvmppc_core_prepare_memory_region_hv(struct kvm *kvm,
struct kvm_memory_slot *memslot,
- struct kvm_userspace_memory_region *mem)
+ const struct kvm_userspace_memory_region *mem)
{
return 0;
}
static void kvmppc_core_commit_memory_region_hv(struct kvm *kvm,
- struct kvm_userspace_memory_region *mem,
+ const struct kvm_userspace_memory_region *mem,
const struct kvm_memory_slot *old)
{
unsigned long npages = mem->memory_size >> PAGE_SHIFT;
diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c
index c01dfc798c66..0873e766df1b 100644
--- a/arch/powerpc/kvm/book3s_pr.c
+++ b/arch/powerpc/kvm/book3s_pr.c
@@ -1573,13 +1573,13 @@ static void kvmppc_core_flush_memslot_pr(struct kvm *kvm,
static int kvmppc_core_prepare_memory_region_pr(struct kvm *kvm,
struct kvm_memory_slot *memslot,
- struct kvm_userspace_memory_region *mem)
+ const struct kvm_userspace_memory_region *mem)
{
return 0;
}
static void kvmppc_core_commit_memory_region_pr(struct kvm *kvm,
- struct kvm_userspace_memory_region *mem,
+ const struct kvm_userspace_memory_region *mem,
const struct kvm_memory_slot *old)
{
return;
diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c
index 3872ab31c80a..518e3a8b351f 100644
--- a/arch/powerpc/kvm/booke.c
+++ b/arch/powerpc/kvm/booke.c
@@ -1784,13 +1784,13 @@ int kvmppc_core_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
int kvmppc_core_prepare_memory_region(struct kvm *kvm,
struct kvm_memory_slot *memslot,
- struct kvm_userspace_memory_region *mem)
+ const struct kvm_userspace_memory_region *mem)
{
return 0;
}
void kvmppc_core_commit_memory_region(struct kvm *kvm,
- struct kvm_userspace_memory_region *mem,
+ const struct kvm_userspace_memory_region *mem,
const struct kvm_memory_slot *old)
{
}
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index 8cd1f80fdc70..5985bb2a332b 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -595,14 +595,14 @@ int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
int kvm_arch_prepare_memory_region(struct kvm *kvm,
struct kvm_memory_slot *memslot,
- struct kvm_userspace_memory_region *mem,
+ const struct kvm_userspace_memory_region *mem,
enum kvm_mr_change change)
{
return kvmppc_core_prepare_memory_region(kvm, memslot, mem);
}
void kvm_arch_commit_memory_region(struct kvm *kvm,
- struct kvm_userspace_memory_region *mem,
+ const struct kvm_userspace_memory_region *mem,
const struct kvm_memory_slot *old,
enum kvm_mr_change change)
{
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index a05107e9b2bf..994f9c37f25f 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -2582,7 +2582,7 @@ int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
/* Section: memory related */
int kvm_arch_prepare_memory_region(struct kvm *kvm,
struct kvm_memory_slot *memslot,
- struct kvm_userspace_memory_region *mem,
+ const struct kvm_userspace_memory_region *mem,
enum kvm_mr_change change)
{
/* A few sanity checks. We can have memory slots which have to be
@@ -2600,7 +2600,7 @@ int kvm_arch_prepare_memory_region(struct kvm *kvm,
}
void kvm_arch_commit_memory_region(struct kvm *kvm,
- struct kvm_userspace_memory_region *mem,
+ const struct kvm_userspace_memory_region *mem,
const struct kvm_memory_slot *old,
enum kvm_mr_change change)
{
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index ec3e5d40e414..278041b55010 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -8039,7 +8039,7 @@ void kvm_arch_memslots_updated(struct kvm *kvm)
int kvm_arch_prepare_memory_region(struct kvm *kvm,
struct kvm_memory_slot *memslot,
- struct kvm_userspace_memory_region *mem,
+ const struct kvm_userspace_memory_region *mem,
enum kvm_mr_change change)
{
/*
@@ -8117,7 +8117,7 @@ static void kvm_mmu_slot_apply_flags(struct kvm *kvm,
}
void kvm_arch_commit_memory_region(struct kvm *kvm,
- struct kvm_userspace_memory_region *mem,
+ const struct kvm_userspace_memory_region *mem,
const struct kvm_memory_slot *old,
enum kvm_mr_change change)
{
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 19d09a08885b..fcdb072f900b 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -502,9 +502,9 @@ enum kvm_mr_change {
};
int kvm_set_memory_region(struct kvm *kvm,
- struct kvm_userspace_memory_region *mem);
+ const struct kvm_userspace_memory_region *mem);
int __kvm_set_memory_region(struct kvm *kvm,
- struct kvm_userspace_memory_region *mem);
+ const struct kvm_userspace_memory_region *mem);
void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
struct kvm_memory_slot *dont);
int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
@@ -512,10 +512,10 @@ int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
void kvm_arch_memslots_updated(struct kvm *kvm);
int kvm_arch_prepare_memory_region(struct kvm *kvm,
struct kvm_memory_slot *memslot,
- struct kvm_userspace_memory_region *mem,
+ const struct kvm_userspace_memory_region *mem,
enum kvm_mr_change change);
void kvm_arch_commit_memory_region(struct kvm *kvm,
- struct kvm_userspace_memory_region *mem,
+ const struct kvm_userspace_memory_region *mem,
const struct kvm_memory_slot *old,
enum kvm_mr_change change);
bool kvm_largepages_enabled(void);
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 1d2254f22d02..c798f55edec3 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -715,7 +715,7 @@ static void update_memslots(struct kvm_memslots *slots,
slots->id_to_index[mslots[i].id] = i;
}
-static int check_memory_region_flags(struct kvm_userspace_memory_region *mem)
+static int check_memory_region_flags(const struct kvm_userspace_memory_region *mem)
{
u32 valid_flags = KVM_MEM_LOG_DIRTY_PAGES;
@@ -765,7 +765,7 @@ static struct kvm_memslots *install_new_memslots(struct kvm *kvm,
* Must be called holding kvm->slots_lock for write.
*/
int __kvm_set_memory_region(struct kvm *kvm,
- struct kvm_userspace_memory_region *mem)
+ const struct kvm_userspace_memory_region *mem)
{
int r;
gfn_t base_gfn;
@@ -804,9 +804,6 @@ int __kvm_set_memory_region(struct kvm *kvm,
if (npages > KVM_MEM_MAX_NR_PAGES)
goto out;
- if (!npages)
- mem->flags &= ~KVM_MEM_LOG_DIRTY_PAGES;
-
new = old = *slot;
new.id = mem->slot;
@@ -942,7 +939,7 @@ out:
EXPORT_SYMBOL_GPL(__kvm_set_memory_region);
int kvm_set_memory_region(struct kvm *kvm,
- struct kvm_userspace_memory_region *mem)
+ const struct kvm_userspace_memory_region *mem)
{
int r;
@@ -958,6 +955,10 @@ static int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
{
if (mem->slot >= KVM_USER_MEM_SLOTS)
return -EINVAL;
+
+ if (!mem->memory_size)
+ mem->flags &= ~KVM_MEM_LOG_DIRTY_PAGES;
+
return kvm_set_memory_region(kvm, mem);
}
--
1.8.3.1
--
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