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Subject[PATCH 1/7] KVM: mmu: remove uninteresting MMU "free" callbacks
Date
The free MMU callback has been a wrapper for mmu_free_roots since mmu_free_roots
itself was introduced (commit 17ac10a, [PATCH] KVM: MU: Special treatment
for shadow pae root pages, 2007-01-05), and has always been the same for all
MMU cases. Remove the indirection as it is useless.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
arch/x86/include/asm/kvm_host.h | 1 -
arch/x86/kvm/mmu.c | 22 ++++------------------
2 files changed, 4 insertions(+), 19 deletions(-)

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index c76ff74..3ea4d40 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -261,7 +261,6 @@ struct kvm_mmu {
bool prefault);
void (*inject_page_fault)(struct kvm_vcpu *vcpu,
struct x86_exception *fault);
- void (*free)(struct kvm_vcpu *vcpu);
gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva, u32 access,
struct x86_exception *exception);
gpa_t (*translate_gpa)(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access);
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index cf95cfe..1c4d580 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -3424,18 +3424,12 @@ out_unlock:
return 0;
}

-static void nonpaging_free(struct kvm_vcpu *vcpu)
-{
- mmu_free_roots(vcpu);
-}
-
static int nonpaging_init_context(struct kvm_vcpu *vcpu,
struct kvm_mmu *context)
{
context->new_cr3 = nonpaging_new_cr3;
context->page_fault = nonpaging_page_fault;
context->gva_to_gpa = nonpaging_gva_to_gpa;
- context->free = nonpaging_free;
context->sync_page = nonpaging_sync_page;
context->invlpg = nonpaging_invlpg;
context->update_pte = nonpaging_update_pte;
@@ -3471,11 +3465,6 @@ static void inject_page_fault(struct kvm_vcpu *vcpu,
vcpu->arch.mmu.inject_page_fault(vcpu, fault);
}

-static void paging_free(struct kvm_vcpu *vcpu)
-{
- nonpaging_free(vcpu);
-}
-
static bool sync_mmio_spte(struct kvm *kvm, u64 *sptep, gfn_t gfn,
unsigned access, int *nr_present)
{
@@ -3683,7 +3672,6 @@ static int paging64_init_context_common(struct kvm_vcpu *vcpu,
context->sync_page = paging64_sync_page;
context->invlpg = paging64_invlpg;
context->update_pte = paging64_update_pte;
- context->free = paging_free;
context->shadow_root_level = level;
context->root_hpa = INVALID_PAGE;
context->direct_map = false;
@@ -3709,7 +3697,6 @@ static int paging32_init_context(struct kvm_vcpu *vcpu,
context->new_cr3 = paging_new_cr3;
context->page_fault = paging32_page_fault;
context->gva_to_gpa = paging32_gva_to_gpa;
- context->free = paging_free;
context->sync_page = paging32_sync_page;
context->invlpg = paging32_invlpg;
context->update_pte = paging32_update_pte;
@@ -3732,7 +3719,6 @@ static int init_kvm_tdp_mmu(struct kvm_vcpu *vcpu)
context->base_role.word = 0;
context->new_cr3 = nonpaging_new_cr3;
context->page_fault = tdp_page_fault;
- context->free = nonpaging_free;
context->sync_page = nonpaging_sync_page;
context->invlpg = nonpaging_invlpg;
context->update_pte = nonpaging_update_pte;
@@ -3812,7 +3798,6 @@ int kvm_init_shadow_ept_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *context,
context->sync_page = ept_sync_page;
context->invlpg = ept_invlpg;
context->update_pte = ept_update_pte;
- context->free = paging_free;
context->root_level = context->shadow_root_level;
context->root_hpa = INVALID_PAGE;
context->direct_map = false;
@@ -3890,9 +3875,10 @@ static int init_kvm_mmu(struct kvm_vcpu *vcpu)
static void destroy_kvm_mmu(struct kvm_vcpu *vcpu)
{
ASSERT(vcpu);
- if (VALID_PAGE(vcpu->arch.mmu.root_hpa))
- /* mmu.free() should set root_hpa = INVALID_PAGE */
- vcpu->arch.mmu.free(vcpu);
+ if (VALID_PAGE(vcpu->arch.mmu.root_hpa)) {
+ mmu_free_roots(vcpu);
+ WARN_ON(VALID_PAGE(vcpu->arch.mmu.root_hpa));
+ }
}

int kvm_mmu_reset_context(struct kvm_vcpu *vcpu)
--
1.8.3.1



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