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KVM: Simplify kvm_free_memslot() and all its descendents 

Now that all callers of kvm_free_memslot() pass NULL for @dont, remove
the param from the top-level routine and all arch's implementations.

No functional change intended.

Tested-by: Christoffer Dall <christoffer.dall@arm.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson 2020-02-18 13:07:27 -08:00 committed by Paolo Bonzini
parent 5c0b4f3d5c
commit e96c81ee89
14 changed files with 37 additions and 61 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/mips/include/asm/kvm_host.h
View File

@ -1133,7 +1133,7 @@ extern unsigned long kvm_mips_get_ramsize(struct kvm *kvm);
static inline void kvm_arch_hardware_unsetup(void) {}
static inline void kvm_arch_sync_events(struct kvm *kvm) {}
static inline void kvm_arch_free_memslot(struct kvm *kvm,
struct kvm_memory_slot *free, struct kvm_memory_slot *dont) {}
struct kvm_memory_slot *slot) {}
static inline void kvm_arch_memslots_updated(struct kvm *kvm, u64 gen) {}
static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) {}

6
arch/powerpc/include/asm/kvm_ppc.h
View File

@ -200,8 +200,7 @@ extern void kvm_free_hpt_cma(struct page *page, unsigned long nr_pages);
extern int kvmppc_core_init_vm(struct kvm *kvm);
extern void kvmppc_core_destroy_vm(struct kvm *kvm);
extern void kvmppc_core_free_memslot(struct kvm *kvm,
struct kvm_memory_slot *free,
struct kvm_memory_slot *dont);
struct kvm_memory_slot *slot);
extern int kvmppc_core_prepare_memory_region(struct kvm *kvm,
struct kvm_memory_slot *memslot,
const struct kvm_userspace_memory_region *mem,
@ -291,8 +290,7 @@ struct kvmppc_ops {
int (*test_age_hva)(struct kvm *kvm, unsigned long hva);
void (*set_spte_hva)(struct kvm *kvm, unsigned long hva, pte_t pte);
void (*mmu_destroy)(struct kvm_vcpu *vcpu);
void (*free_memslot)(struct kvm_memory_slot *free,
struct kvm_memory_slot *dont);
void (*free_memslot)(struct kvm_memory_slot *slot);
int (*init_vm)(struct kvm *kvm);
void (*destroy_vm)(struct kvm *kvm);
int (*get_smmu_info)(struct kvm *kvm, struct kvm_ppc_smmu_info *info);

5
arch/powerpc/kvm/book3s.c
View File

@ -804,10 +804,9 @@ int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
return kvm->arch.kvm_ops->get_dirty_log(kvm, log);
}
void kvmppc_core_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
struct kvm_memory_slot *dont)
void kvmppc_core_free_memslot(struct kvm *kvm, struct kvm_memory_slot *slot)
{
kvm->arch.kvm_ops->free_memslot(free, dont);
kvm->arch.kvm_ops->free_memslot(slot);
}
void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot)

9
arch/powerpc/kvm/book3s_hv.c
View File

@ -4447,13 +4447,10 @@ out:
return r;
}
static void kvmppc_core_free_memslot_hv(struct kvm_memory_slot *free,
struct kvm_memory_slot *dont)
static void kvmppc_core_free_memslot_hv(struct kvm_memory_slot *slot)
{
if (!dont || free->arch.rmap != dont->arch.rmap) {
vfree(free->arch.rmap);
free->arch.rmap = NULL;
}
vfree(slot->arch.rmap);
slot->arch.rmap = NULL;
}
static int kvmppc_core_prepare_memory_region_hv(struct kvm *kvm,

3
arch/powerpc/kvm/book3s_pr.c
View File

@ -1942,8 +1942,7 @@ static void kvmppc_core_commit_memory_region_pr(struct kvm *kvm,
return;
}
static void kvmppc_core_free_memslot_pr(struct kvm_memory_slot *free,
struct kvm_memory_slot *dont)
static void kvmppc_core_free_memslot_pr(struct kvm_memory_slot *slot)
{
return;
}

3
arch/powerpc/kvm/booke.c
View File

@ -1771,8 +1771,7 @@ int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
return -ENOTSUPP;
}
void kvmppc_core_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
struct kvm_memory_slot *dont)
void kvmppc_core_free_memslot(struct kvm *kvm, struct kvm_memory_slot *slot)
{
}

5
arch/powerpc/kvm/powerpc.c
View File

@ -685,10 +685,9 @@ long kvm_arch_dev_ioctl(struct file *filp,
return -EINVAL;
}
void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
struct kvm_memory_slot *dont)
void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *slot)
{
kvmppc_core_free_memslot(kvm, free, dont);
kvmppc_core_free_memslot(kvm, slot);
}
int kvm_arch_prepare_memory_region(struct kvm *kvm,

2
arch/s390/include/asm/kvm_host.h
View File

@ -921,7 +921,7 @@ static inline void kvm_arch_hardware_disable(void) {}
static inline void kvm_arch_sync_events(struct kvm *kvm) {}
static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
static inline void kvm_arch_free_memslot(struct kvm *kvm,
struct kvm_memory_slot *free, struct kvm_memory_slot *dont) {}
struct kvm_memory_slot *slot) {}
static inline void kvm_arch_memslots_updated(struct kvm *kvm, u64 gen) {}
static inline void kvm_arch_flush_shadow_all(struct kvm *kvm) {}
static inline void kvm_arch_flush_shadow_memslot(struct kvm *kvm,

3
arch/x86/include/asm/kvm_page_track.h
View File

@ -49,8 +49,7 @@ struct kvm_page_track_notifier_node {
void kvm_page_track_init(struct kvm *kvm);
void kvm_page_track_cleanup(struct kvm *kvm);
void kvm_page_track_free_memslot(struct kvm_memory_slot *free,
struct kvm_memory_slot *dont);
void kvm_page_track_free_memslot(struct kvm_memory_slot *slot);
int kvm_page_track_create_memslot(struct kvm_memory_slot *slot,
unsigned long npages);

15
arch/x86/kvm/mmu/page_track.c
View File

@ -19,17 +19,14 @@
#include "mmu.h"
void kvm_page_track_free_memslot(struct kvm_memory_slot *free,
struct kvm_memory_slot *dont)
void kvm_page_track_free_memslot(struct kvm_memory_slot *slot)
{
int i;
for (i = 0; i < KVM_PAGE_TRACK_MAX; i++)
if (!dont || free->arch.gfn_track[i] !=
dont->arch.gfn_track[i]) {
kvfree(free->arch.gfn_track[i]);
free->arch.gfn_track[i] = NULL;
}
for (i = 0; i < KVM_PAGE_TRACK_MAX; i++) {
kvfree(slot->arch.gfn_track[i]);
slot->arch.gfn_track[i] = NULL;
}
}
int kvm_page_track_create_memslot(struct kvm_memory_slot *slot,
@ -48,7 +45,7 @@ int kvm_page_track_create_memslot(struct kvm_memory_slot *slot,
return 0;
track_free:
kvm_page_track_free_memslot(slot, NULL);
kvm_page_track_free_memslot(slot);
return -ENOMEM;
}

21
arch/x86/kvm/x86.c
View File

@ -9850,27 +9850,22 @@ void kvm_arch_destroy_vm(struct kvm *kvm)
kvm_hv_destroy_vm(kvm);
}
void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
struct kvm_memory_slot *dont)
void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *slot)
{
int i;
for (i = 0; i < KVM_NR_PAGE_SIZES; ++i) {
if (!dont || free->arch.rmap[i] != dont->arch.rmap[i]) {
kvfree(free->arch.rmap[i]);
free->arch.rmap[i] = NULL;
}
kvfree(slot->arch.rmap[i]);
slot->arch.rmap[i] = NULL;
if (i == 0)
continue;
if (!dont || free->arch.lpage_info[i - 1] !=
dont->arch.lpage_info[i - 1]) {
kvfree(free->arch.lpage_info[i - 1]);
free->arch.lpage_info[i - 1] = NULL;
}
kvfree(slot->arch.lpage_info[i - 1]);
slot->arch.lpage_info[i - 1] = NULL;
}
kvm_page_track_free_memslot(free, dont);
kvm_page_track_free_memslot(slot);
}
static int kvm_alloc_memslot_metadata(struct kvm_memory_slot *slot,
@ -10069,7 +10064,7 @@ void kvm_arch_commit_memory_region(struct kvm *kvm,
/* Free the arrays associated with the old memslot. */
if (change == KVM_MR_MOVE)
kvm_arch_free_memslot(kvm, old, NULL);
kvm_arch_free_memslot(kvm, old);
}
void kvm_arch_flush_shadow_all(struct kvm *kvm)

3
include/linux/kvm_host.h
View File

@ -669,8 +669,7 @@ int kvm_set_memory_region(struct kvm *kvm,
const struct kvm_userspace_memory_region *mem);
int __kvm_set_memory_region(struct kvm *kvm,
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);
void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *slot);
void kvm_arch_memslots_updated(struct kvm *kvm, u64 gen);
int kvm_arch_prepare_memory_region(struct kvm *kvm,
struct kvm_memory_slot *memslot,

3
virt/kvm/arm/mmu.c
View File

@ -2349,8 +2349,7 @@ out:
return ret;
}
void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
struct kvm_memory_slot *dont)
void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *slot)
{
}

18
virt/kvm/kvm_main.c
View File

@ -580,18 +580,14 @@ static void kvm_destroy_dirty_bitmap(struct kvm_memory_slot *memslot)
memslot->dirty_bitmap = NULL;
}
/*
* Free any memory in @free but not in @dont.
*/
static void kvm_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
struct kvm_memory_slot *dont)
static void kvm_free_memslot(struct kvm *kvm, struct kvm_memory_slot *slot)
{
if (!dont || free->dirty_bitmap != dont->dirty_bitmap)
kvm_destroy_dirty_bitmap(free);
kvm_destroy_dirty_bitmap(slot);
kvm_arch_free_memslot(kvm, free, dont);
kvm_arch_free_memslot(kvm, slot);
free->npages = 0;
slot->flags = 0;
slot->npages = 0;
}
static void kvm_free_memslots(struct kvm *kvm, struct kvm_memslots *slots)
@ -602,7 +598,7 @@ static void kvm_free_memslots(struct kvm *kvm, struct kvm_memslots *slots)
return;
kvm_for_each_memslot(memslot, slots)
kvm_free_memslot(kvm, memslot, NULL);
kvm_free_memslot(kvm, memslot);
kvfree(slots);
}
@ -1060,7 +1056,7 @@ static int kvm_delete_memslot(struct kvm *kvm,
if (r)
return r;
kvm_free_memslot(kvm, old, NULL);
kvm_free_memslot(kvm, old);
return 0;
}