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Date: Tue, 28 Sep 2010 17:03:14 +0800
From: Xiao Guangrong <xiaoguangrong@...fujitsu.com>
To: Avi Kivity <avi@...hat.com>
CC: Marcelo Tosatti <mtosatti@...hat.com>,
LKML <linux-kernel@...r.kernel.org>, KVM <kvm@...r.kernel.org>
Subject: [PATCH] KVM: MMU: move access code parsing to FNAME(walk_addr) function
Move access code parsing from caller site to FNAME(walk_addr) function
Signed-off-by: Xiao Guangrong <xiaoguangrong@...fujitsu.com>
---
arch/x86/kvm/paging_tmpl.h | 40 ++++++++++++++++------------------------
1 files changed, 16 insertions(+), 24 deletions(-)
diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h
index a83ff37..9a5f7bb 100644
--- a/arch/x86/kvm/paging_tmpl.h
+++ b/arch/x86/kvm/paging_tmpl.h
@@ -116,16 +116,18 @@ static unsigned FNAME(gpte_access)(struct kvm_vcpu *vcpu, pt_element_t gpte)
*/
static int FNAME(walk_addr_generic)(struct guest_walker *walker,
struct kvm_vcpu *vcpu, struct kvm_mmu *mmu,
- gva_t addr, int write_fault,
- int user_fault, int fetch_fault)
+ gva_t addr, u32 access)
{
pt_element_t pte;
gfn_t table_gfn;
unsigned index, pt_access, uninitialized_var(pte_access);
gpa_t pte_gpa;
bool eperm, present, rsvd_fault;
- int offset;
- u32 access = 0;
+ int offset, write_fault, user_fault, fetch_fault;
+
+ write_fault = access & PFERR_WRITE_MASK;
+ user_fault = access & PFERR_USER_MASK;
+ fetch_fault = access & PFERR_FETCH_MASK;
trace_kvm_mmu_pagetable_walk(addr, write_fault, user_fault,
fetch_fault);
@@ -215,6 +217,7 @@ walk:
int lvl = walker->level;
gpa_t real_gpa;
gfn_t gfn;
+ u32 ac;
gfn = gpte_to_gfn_lvl(pte, lvl);
gfn += (addr & PT_LVL_OFFSET_MASK(lvl)) >> PAGE_SHIFT;
@@ -224,10 +227,10 @@ walk:
is_cpuid_PSE36())
gfn += pse36_gfn_delta(pte);
- access |= write_fault | fetch_fault | user_fault;
+ ac = write_fault | fetch_fault | user_fault;
real_gpa = mmu->translate_gpa(vcpu, gfn_to_gpa(gfn),
- access);
+ ac);
if (real_gpa == UNMAPPED_GVA)
return 0;
@@ -282,21 +285,18 @@ error:
}
static int FNAME(walk_addr)(struct guest_walker *walker,
- struct kvm_vcpu *vcpu, gva_t addr,
- int write_fault, int user_fault, int fetch_fault)
+ struct kvm_vcpu *vcpu, gva_t addr, u32 access)
{
return FNAME(walk_addr_generic)(walker, vcpu, &vcpu->arch.mmu, addr,
- write_fault, user_fault, fetch_fault);
+ access);
}
static int FNAME(walk_addr_nested)(struct guest_walker *walker,
struct kvm_vcpu *vcpu, gva_t addr,
- int write_fault, int user_fault,
- int fetch_fault)
+ u32 access)
{
return FNAME(walk_addr_generic)(walker, vcpu, &vcpu->arch.nested_mmu,
- addr, write_fault, user_fault,
- fetch_fault);
+ addr, access);
}
static void FNAME(update_pte)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp,
@@ -532,7 +532,6 @@ static int FNAME(page_fault)(struct kvm_vcpu *vcpu, gva_t addr,
{
int write_fault = error_code & PFERR_WRITE_MASK;
int user_fault = error_code & PFERR_USER_MASK;
- int fetch_fault = error_code & PFERR_FETCH_MASK;
struct guest_walker walker;
u64 *sptep;
int write_pt = 0;
@@ -550,8 +549,7 @@ static int FNAME(page_fault)(struct kvm_vcpu *vcpu, gva_t addr,
/*
* Look up the guest pte for the faulting address.
*/
- r = FNAME(walk_addr)(&walker, vcpu, addr, write_fault, user_fault,
- fetch_fault);
+ r = FNAME(walk_addr)(&walker, vcpu, addr, error_code);
/*
* The page is not mapped by the guest. Let the guest handle it.
@@ -669,10 +667,7 @@ static gpa_t FNAME(gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t vaddr, u32 access,
gpa_t gpa = UNMAPPED_GVA;
int r;
- r = FNAME(walk_addr)(&walker, vcpu, vaddr,
- access & PFERR_WRITE_MASK,
- access & PFERR_USER_MASK,
- access & PFERR_FETCH_MASK);
+ r = FNAME(walk_addr)(&walker, vcpu, vaddr, access);
if (r) {
gpa = gfn_to_gpa(walker.gfn);
@@ -690,10 +685,7 @@ static gpa_t FNAME(gva_to_gpa_nested)(struct kvm_vcpu *vcpu, gva_t vaddr,
gpa_t gpa = UNMAPPED_GVA;
int r;
- r = FNAME(walk_addr_nested)(&walker, vcpu, vaddr,
- access & PFERR_WRITE_MASK,
- access & PFERR_USER_MASK,
- access & PFERR_FETCH_MASK);
+ r = FNAME(walk_addr_nested)(&walker, vcpu, vaddr, access);
if (r) {
gpa = gfn_to_gpa(walker.gfn);
--
1.7.0.4
--
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