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KVM: MMU: audit: introduce audit_printk to cleanup audit code

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Introduce audit_printk, and record audit point instead audit name

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Xiao Guangrong 2010-09-27 18:07:59 +08:00 committed by Avi Kivity
parent c42fffe3a3
commit 38904e1287
1 changed files with 18 additions and 24 deletions
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42
arch/x86/kvm/mmu_audit.c
View file

@ -19,7 +19,11 @@
#include <linux/ratelimit.h>
static const char *audit_msg;
static int audit_point;
#define audit_printk(fmt, args...) \
printk(KERN_ERR "audit: (%s) error: " \
fmt, audit_point_name[audit_point], ##args)
typedef void (*inspect_spte_fn) (struct kvm_vcpu *vcpu, u64 *sptep, int level);
@ -93,21 +97,18 @@ static void audit_mappings(struct kvm_vcpu *vcpu, u64 *sptep, int level)
if (sp->unsync) {
if (level != PT_PAGE_TABLE_LEVEL) {
printk(KERN_ERR "audit: (%s) error: unsync sp: %p level = %d\n",
audit_msg, sp, level);
audit_printk("unsync sp: %p level = %d\n", sp, level);
return;
}
if (*sptep == shadow_notrap_nonpresent_pte) {
printk(KERN_ERR "audit: (%s) error: notrap spte in unsync sp: %p\n",
audit_msg, sp);
audit_printk("notrap spte in unsync sp: %p\n", sp);
return;
}
}
if (sp->role.direct && *sptep == shadow_notrap_nonpresent_pte) {
printk(KERN_ERR "audit: (%s) error: notrap spte in direct sp: %p\n",
audit_msg, sp);
audit_printk("notrap spte in direct sp: %p\n", sp);
return;
}
@ -124,10 +125,8 @@ static void audit_mappings(struct kvm_vcpu *vcpu, u64 *sptep, int level)
hpa = pfn << PAGE_SHIFT;
if ((*sptep & PT64_BASE_ADDR_MASK) != hpa)
printk(KERN_ERR "xx audit error: (%s) levels %d"
"pfn %llx hpa %llx ent %llxn",
audit_msg, vcpu->arch.mmu.root_level,
pfn, hpa, *sptep);
audit_printk("levels %d pfn %llx hpa %llx ent %llxn",
vcpu->arch.mmu.root_level, pfn, hpa, *sptep);
}
static void inspect_spte_has_rmap(struct kvm *kvm, u64 *sptep)
@ -143,11 +142,9 @@ static void inspect_spte_has_rmap(struct kvm *kvm, u64 *sptep)
if (!gfn_to_memslot(kvm, gfn)) {
if (!printk_ratelimit())
return;
printk(KERN_ERR "%s: no memslot for gfn %llx\n",
audit_msg, gfn);
printk(KERN_ERR "%s: index %ld of sp (gfn=%llx)\n",
audit_msg, (long int)(sptep - rev_sp->spt),
rev_sp->gfn);
audit_printk("no memslot for gfn %llx\n", gfn);
audit_printk("index %ld of sp (gfn=%llx)\n",
(long int)(sptep - rev_sp->spt), rev_sp->gfn);
dump_stack();
return;
}
@ -156,8 +153,7 @@ static void inspect_spte_has_rmap(struct kvm *kvm, u64 *sptep)
if (!*rmapp) {
if (!printk_ratelimit())
return;
printk(KERN_ERR "%s: no rmap for writable spte %llx\n",
audit_msg, *sptep);
audit_printk("no rmap for writable spte %llx\n", *sptep);
dump_stack();
}
}
@ -198,10 +194,8 @@ void audit_write_protection(struct kvm *kvm, struct kvm_mmu_page *sp)
spte = rmap_next(kvm, rmapp, NULL);
while (spte) {
if (is_writable_pte(*spte))
printk(KERN_ERR "%s: (%s) shadow page has "
"writable mappings: gfn %llx role %x\n",
__func__, audit_msg, sp->gfn,
sp->role.word);
audit_printk("shadow page has writable mappings: gfn "
"%llx role %x\n", sp->gfn, sp->role.word);
spte = rmap_next(kvm, rmapp, spte);
}
}
@ -228,14 +222,14 @@ static void audit_vcpu_spte(struct kvm_vcpu *vcpu)
mmu_spte_walk(vcpu, audit_spte);
}
static void kvm_mmu_audit(void *ignore, struct kvm_vcpu *vcpu, int audit_point)
static void kvm_mmu_audit(void *ignore, struct kvm_vcpu *vcpu, int point)
{
static DEFINE_RATELIMIT_STATE(ratelimit_state, 5 * HZ, 10);
if (!__ratelimit(&ratelimit_state))
return;
audit_msg = audit_point_name[audit_point];
audit_point = point;
audit_all_active_sps(vcpu->kvm);
audit_vcpu_spte(vcpu);
}