| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Wed, 21 Dec 2022 22:24:09 +0000
From: Ben Gardon <bgardon@...gle.com>
To: linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc: Paolo Bonzini <pbonzini@...hat.com>, Peter Xu <peterx@...hat.com>,
Sean Christopherson <seanjc@...gle.com>,
David Matlack <dmatlack@...gle.com>,
Vipin Sharma <vipinsh@...gle.com>,
Nagareddy Reddy <nspreddy@...gle.com>,
Ben Gardon <bgardon@...gle.com>
Subject: [RFC 05/14] KVM: x86/MMU: Move paging_tmpl.h includes to shadow_mmu.c
Move the integration point for paging_tmpl.h to shadow_mmu.c since
paging_tmpl.h is ostensibly part of the Shadow MMU. This requires
modifying some of the definitions to be non-static and then exporting
the pre-processed function names through shadow_mmu.h since they are
needed for mmu context callbacks in mmu.c. This will facilitate cleanups
in following commits because many of the functions being exposed by
shadow_mmu.h are only needed by paging_tmpl.h. Those functions will no
longer need to be exported.
sync_mmio_spte() is only used by paging_tmpl.h, so move it along with
the includes.
No functional change intended.
Signed-off-by: Ben Gardon <bgardon@...gle.com>
---
arch/x86/kvm/mmu/mmu.c | 29 -----------------------------
arch/x86/kvm/mmu/paging_tmpl.h | 11 +++++------
arch/x86/kvm/mmu/shadow_mmu.c | 30 ++++++++++++++++++++++++++++++
arch/x86/kvm/mmu/shadow_mmu.h | 25 ++++++++++++++++++++++++-
4 files changed, 59 insertions(+), 36 deletions(-)
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index a17e8a79e4df..dd97e346c786 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -1699,35 +1699,6 @@ static unsigned long get_cr3(struct kvm_vcpu *vcpu)
return kvm_read_cr3(vcpu);
}
-static bool sync_mmio_spte(struct kvm_vcpu *vcpu, u64 *sptep, gfn_t gfn,
- unsigned int access)
-{
- if (unlikely(is_mmio_spte(*sptep))) {
- if (gfn != get_mmio_spte_gfn(*sptep)) {
- mmu_spte_clear_no_track(sptep);
- return true;
- }
-
- mark_mmio_spte(vcpu, sptep, gfn, access);
- return true;
- }
-
- return false;
-}
-
-#define PTTYPE_EPT 18 /* arbitrary */
-#define PTTYPE PTTYPE_EPT
-#include "paging_tmpl.h"
-#undef PTTYPE
-
-#define PTTYPE 64
-#include "paging_tmpl.h"
-#undef PTTYPE
-
-#define PTTYPE 32
-#include "paging_tmpl.h"
-#undef PTTYPE
-
static void
__reset_rsvds_bits_mask(struct rsvd_bits_validate *rsvd_check,
u64 pa_bits_rsvd, int level, bool nx, bool gbpages,
diff --git a/arch/x86/kvm/mmu/paging_tmpl.h b/arch/x86/kvm/mmu/paging_tmpl.h
index 0f6455072055..2e3b2aca64ad 100644
--- a/arch/x86/kvm/mmu/paging_tmpl.h
+++ b/arch/x86/kvm/mmu/paging_tmpl.h
@@ -787,7 +787,7 @@ FNAME(is_self_change_mapping)(struct kvm_vcpu *vcpu,
* Returns: 1 if we need to emulate the instruction, 0 otherwise, or
* a negative value on error.
*/
-static int FNAME(page_fault)(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault)
+int FNAME(page_fault)(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault)
{
struct guest_walker walker;
int r;
@@ -897,7 +897,7 @@ static gpa_t FNAME(get_level1_sp_gpa)(struct kvm_mmu_page *sp)
return gfn_to_gpa(sp->gfn) + offset * sizeof(pt_element_t);
}
-static void FNAME(invlpg)(struct kvm_vcpu *vcpu, gva_t gva, hpa_t root_hpa)
+void FNAME(invlpg)(struct kvm_vcpu *vcpu, gva_t gva, hpa_t root_hpa)
{
struct kvm_shadow_walk_iterator iterator;
struct kvm_mmu_page *sp;
@@ -957,9 +957,8 @@ static void FNAME(invlpg)(struct kvm_vcpu *vcpu, gva_t gva, hpa_t root_hpa)
}
/* Note, @addr is a GPA when gva_to_gpa() translates an L2 GPA to an L1 GPA. */
-static gpa_t FNAME(gva_to_gpa)(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu,
- gpa_t addr, u64 access,
- struct x86_exception *exception)
+gpa_t FNAME(gva_to_gpa)(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, gpa_t addr,
+ u64 access, struct x86_exception *exception)
{
struct guest_walker walker;
gpa_t gpa = INVALID_GPA;
@@ -992,7 +991,7 @@ static gpa_t FNAME(gva_to_gpa)(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu,
* 0: the sp is synced and no tlb flushing is required
* > 0: the sp is synced and tlb flushing is required
*/
-static int FNAME(sync_page)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp)
+int FNAME(sync_page)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp)
{
union kvm_mmu_page_role root_role = vcpu->arch.mmu->root_role;
int i;
diff --git a/arch/x86/kvm/mmu/shadow_mmu.c b/arch/x86/kvm/mmu/shadow_mmu.c
index 05d8f5be559d..86b5fb75d50a 100644
--- a/arch/x86/kvm/mmu/shadow_mmu.c
+++ b/arch/x86/kvm/mmu/shadow_mmu.c
@@ -10,6 +10,7 @@
* Shadow MMU also supports TDP, it's just less scalable. The Shadow and TDP
* MMUs can cooperate to support nested virtualization on hardware with TDP.
*/
+#include "ioapic.h"
#include "mmu.h"
#include "mmu_internal.h"
#include "mmutrace.h"
@@ -2798,6 +2799,35 @@ void shadow_page_table_clear_flood(struct kvm_vcpu *vcpu, gva_t addr)
walk_shadow_page_lockless_end(vcpu);
}
+static bool sync_mmio_spte(struct kvm_vcpu *vcpu, u64 *sptep, gfn_t gfn,
+ unsigned int access)
+{
+ if (unlikely(is_mmio_spte(*sptep))) {
+ if (gfn != get_mmio_spte_gfn(*sptep)) {
+ mmu_spte_clear_no_track(sptep);
+ return true;
+ }
+
+ mark_mmio_spte(vcpu, sptep, gfn, access);
+ return true;
+ }
+
+ return false;
+}
+
+#define PTTYPE_EPT 18 /* arbitrary */
+#define PTTYPE PTTYPE_EPT
+#include "paging_tmpl.h"
+#undef PTTYPE
+
+#define PTTYPE 64
+#include "paging_tmpl.h"
+#undef PTTYPE
+
+#define PTTYPE 32
+#include "paging_tmpl.h"
+#undef PTTYPE
+
static bool is_obsolete_root(struct kvm *kvm, hpa_t root_hpa)
{
struct kvm_mmu_page *sp;
diff --git a/arch/x86/kvm/mmu/shadow_mmu.h b/arch/x86/kvm/mmu/shadow_mmu.h
index 83876047c1f5..00d2f9abecf0 100644
--- a/arch/x86/kvm/mmu/shadow_mmu.h
+++ b/arch/x86/kvm/mmu/shadow_mmu.h
@@ -73,7 +73,6 @@ bool kvm_test_age_rmap(struct kvm *kvm, struct kvm_rmap_head *rmap_head,
int level, pte_t unused);
void drop_parent_pte(struct kvm_mmu_page *sp, u64 *parent_pte);
-int nonpaging_sync_page(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp);
int mmu_sync_children(struct kvm_vcpu *vcpu, struct kvm_mmu_page *parent,
bool can_yield);
void __clear_sp_write_flooding_count(struct kvm_mmu_page *sp);
@@ -150,4 +149,28 @@ void kvm_rmap_zap_collapsible_sptes(struct kvm *kvm,
const struct kvm_memory_slot *slot);
unsigned long mmu_shrink_scan(struct shrinker *shrink, struct shrink_control *sc);
+
+/* Exports from paging_tmpl.h */
+gpa_t paging32_gva_to_gpa(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu,
+ gpa_t vaddr, u64 access,
+ struct x86_exception *exception);
+gpa_t paging64_gva_to_gpa(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu,
+ gpa_t vaddr, u64 access,
+ struct x86_exception *exception);
+gpa_t ept_gva_to_gpa(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, gpa_t vaddr,
+ u64 access, struct x86_exception *exception);
+
+int paging32_page_fault(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault);
+int paging64_page_fault(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault);
+int ept_page_fault(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault);
+
+int paging32_sync_page(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp);
+int paging64_sync_page(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp);
+int ept_sync_page(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp);
+/* Defined in shadow_mmu.c. */
+int nonpaging_sync_page(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp);
+
+void paging32_invlpg(struct kvm_vcpu *vcpu, gva_t gva, hpa_t root);
+void paging64_invlpg(struct kvm_vcpu *vcpu, gva_t gva, hpa_t root);
+void ept_invlpg(struct kvm_vcpu *vcpu, gva_t gva, hpa_t root);
#endif /* __KVM_X86_MMU_SHADOW_MMU_H */
--
2.39.0.314.g84b9a713c41-goog
Powered by blists - more mailing lists