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KVM: MIPS: Use common KVM implementation of MMU memory caches

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Move to the common MMU memory cache implementation now that the common
code and MIPS's existing code are semantically compatible.

No functional change intended.

Suggested-by: Christoffer Dall <christoffer.dall@arm.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <20200703023545.8771-22-sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Cette révision appartient à :
Sean Christopherson
2020-07-02 19:35:45 -07:00
révisé par Paolo Bonzini
Parent 0cdc739b66
révision 380f3a8b63
4 fichiers modifiés avec 12 ajouts et 47 suppressions
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40
arch/mips/kvm/mmu.c
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@@ -25,39 +25,9 @@
#define KVM_MMU_CACHE_MIN_PAGES 2
#endif
static int mmu_topup_memory_cache(struct kvm_mmu_memory_cache *cache, int min)
{
void *page;
if (cache->nobjs >= min)
return 0;
while (cache->nobjs < ARRAY_SIZE(cache->objects)) {
page = (void *)__get_free_page(GFP_KERNEL_ACCOUNT);
if (!page)
return -ENOMEM;
cache->objects[cache->nobjs++] = page;
}
return 0;
}
static void mmu_free_memory_cache(struct kvm_mmu_memory_cache *mc)
{
while (mc->nobjs)
free_page((unsigned long)mc->objects[--mc->nobjs]);
}
static void *mmu_memory_cache_alloc(struct kvm_mmu_memory_cache *mc)
{
void *p;
BUG_ON(!mc || !mc->nobjs);
p = mc->objects[--mc->nobjs];
return p;
}
void kvm_mmu_free_memory_caches(struct kvm_vcpu *vcpu)
{
mmu_free_memory_cache(&vcpu->arch.mmu_page_cache);
kvm_mmu_free_memory_cache(&vcpu->arch.mmu_page_cache);
}
/**
@@ -151,7 +121,7 @@ static pte_t *kvm_mips_walk_pgd(pgd_t *pgd, struct kvm_mmu_memory_cache *cache,
if (!cache)
return NULL;
new_pmd = mmu_memory_cache_alloc(cache);
new_pmd = kvm_mmu_memory_cache_alloc(cache);
pmd_init((unsigned long)new_pmd,
(unsigned long)invalid_pte_table);
pud_populate(NULL, pud, new_pmd);
@@ -162,7 +132,7 @@ static pte_t *kvm_mips_walk_pgd(pgd_t *pgd, struct kvm_mmu_memory_cache *cache,
if (!cache)
return NULL;
new_pte = mmu_memory_cache_alloc(cache);
new_pte = kvm_mmu_memory_cache_alloc(cache);
clear_page(new_pte);
pmd_populate_kernel(NULL, pmd, new_pte);
}
@@ -709,7 +679,7 @@ static int kvm_mips_map_page(struct kvm_vcpu *vcpu, unsigned long gpa,
goto out;
/* We need a minimum of cached pages ready for page table creation */
err = mmu_topup_memory_cache(memcache, KVM_MMU_CACHE_MIN_PAGES);
err = kvm_mmu_topup_memory_cache(memcache, KVM_MMU_CACHE_MIN_PAGES);
if (err)
goto out;
@@ -793,7 +763,7 @@ static pte_t *kvm_trap_emul_pte_for_gva(struct kvm_vcpu *vcpu,
int ret;
/* We need a minimum of cached pages ready for page table creation */
ret = mmu_topup_memory_cache(memcache, KVM_MMU_CACHE_MIN_PAGES);
ret = kvm_mmu_topup_memory_cache(memcache, KVM_MMU_CACHE_MIN_PAGES);
if (ret)
return NULL;