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WSL2-Linux-Kernel
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KVM: MMU: Modify kvm_shadow_walk.entry to accept u64 addr 

EPT is 4 level by default in 32pae(48 bits), but the addr parameter
of kvm_shadow_walk->entry() only accept unsigned long as virtual
address, which is 32bit in 32pae. This result in SHADOW_PT_INDEX()
overflow when try to fetch level 4 index.

Fix it by extend kvm_shadow_walk->entry() to accept 64bit addr in
parameter.

Signed-off-by: Sheng Yang <sheng.yang@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Sheng Yang 2008-09-01 19:41:20 +08:00 коммит произвёл Avi Kivity
Родитель 8c4b537da7
Коммит d40a1ee485
2 изменённых файлов: 7 добавлений и 7 удалений
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10
arch/x86/kvm/mmu.c
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@ -144,7 +144,7 @@ struct kvm_rmap_desc {
struct kvm_shadow_walk {
int (*entry)(struct kvm_shadow_walk *walk, struct kvm_vcpu *vcpu,
gva_t addr, u64 *spte, int level);
u64 addr, u64 *spte, int level);
};
static struct kmem_cache *pte_chain_cache;
@ -941,7 +941,7 @@ static struct kvm_mmu_page *kvm_mmu_get_page(struct kvm_vcpu *vcpu,
}
static int walk_shadow(struct kvm_shadow_walk *walker,
struct kvm_vcpu *vcpu, gva_t addr)
struct kvm_vcpu *vcpu, u64 addr)
{
hpa_t shadow_addr;
int level;
@ -1270,7 +1270,7 @@ struct direct_shadow_walk {
static int direct_map_entry(struct kvm_shadow_walk *_walk,
struct kvm_vcpu *vcpu,
gva_t addr, u64 *sptep, int level)
u64 addr, u64 *sptep, int level)
{
struct direct_shadow_walk *walk =
container_of(_walk, struct direct_shadow_walk, walker);
@ -1289,7 +1289,7 @@ static int direct_map_entry(struct kvm_shadow_walk *_walk,
if (*sptep == shadow_trap_nonpresent_pte) {
pseudo_gfn = (addr & PT64_DIR_BASE_ADDR_MASK) >> PAGE_SHIFT;
sp = kvm_mmu_get_page(vcpu, pseudo_gfn, addr, level - 1,
sp = kvm_mmu_get_page(vcpu, pseudo_gfn, (gva_t)addr, level - 1,
1, ACC_ALL, sptep);
if (!sp) {
pgprintk("nonpaging_map: ENOMEM\n");
@ -1317,7 +1317,7 @@ static int __direct_map(struct kvm_vcpu *vcpu, gpa_t v, int write,
.pt_write = 0,
};
r = walk_shadow(&walker.walker, vcpu, (gva_t)gfn << PAGE_SHIFT);
r = walk_shadow(&walker.walker, vcpu, gfn << PAGE_SHIFT);
if (r < 0)
return r;
return walker.pt_write;

4
arch/x86/kvm/paging_tmpl.h
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@ -286,7 +286,7 @@ static void FNAME(update_pte)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *page,
* Fetch a shadow pte for a specific level in the paging hierarchy.
*/
static int FNAME(shadow_walk_entry)(struct kvm_shadow_walk *_sw,
struct kvm_vcpu *vcpu, gva_t addr,
struct kvm_vcpu *vcpu, u64 addr,
u64 *sptep, int level)
{
struct shadow_walker *sw =
@ -326,7 +326,7 @@ static int FNAME(shadow_walk_entry)(struct kvm_shadow_walk *_sw,
metaphysical = 0;
table_gfn = gw->table_gfn[level - 2];
}
shadow_page = kvm_mmu_get_page(vcpu, table_gfn, addr, level-1,
shadow_page = kvm_mmu_get_page(vcpu, table_gfn, (gva_t)addr, level-1,
metaphysical, access, sptep);
if (!metaphysical) {
r = kvm_read_guest_atomic(vcpu->kvm, gw->pte_gpa[level - 2],