| 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: Tue, 20 Jan 2009 08:15:43 -0500
From: Brian Gerst <brgerst@...il.com>
To: Tejun Heo <tj@...nel.org>
Cc: Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org,
Brian Gerst <brgerst@...il.com>
Subject: [PATCH 4/6] x86: Merge mmu_context.h
Signed-off-by: Brian Gerst <brgerst@...il.com>
---
arch/x86/include/asm/mmu_context.h | 64 ++++++++++++++++++++++++++++++--
arch/x86/include/asm/mmu_context_32.h | 55 ----------------------------
arch/x86/include/asm/mmu_context_64.h | 52 --------------------------
3 files changed, 60 insertions(+), 111 deletions(-)
delete mode 100644 arch/x86/include/asm/mmu_context_32.h
delete mode 100644 arch/x86/include/asm/mmu_context_64.h
diff --git a/arch/x86/include/asm/mmu_context.h b/arch/x86/include/asm/mmu_context.h
index 8aeeb3f..7bf6a72 100644
--- a/arch/x86/include/asm/mmu_context.h
+++ b/arch/x86/include/asm/mmu_context.h
@@ -21,11 +21,55 @@ static inline void paravirt_activate_mm(struct mm_struct *prev,
int init_new_context(struct task_struct *tsk, struct mm_struct *mm);
void destroy_context(struct mm_struct *mm);
-#ifdef CONFIG_X86_32
-# include "mmu_context_32.h"
-#else
-# include "mmu_context_64.h"
+
+static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
+{
+#ifdef CONFIG_SMP
+ if (percpu_read(cpu_tlbstate.state) == TLBSTATE_OK)
+ percpu_write(cpu_tlbstate.state, TLBSTATE_LAZY);
+#endif
+}
+
+static inline void switch_mm(struct mm_struct *prev,
+ struct mm_struct *next,
+ struct task_struct *tsk)
+{
+ int cpu = smp_processor_id();
+
+ if (likely(prev != next)) {
+ /* stop flush ipis for the previous mm */
+ cpu_clear(cpu, prev->cpu_vm_mask);
+#ifdef CONFIG_SMP
+ percpu_write(cpu_tlbstate.state, TLBSTATE_OK);
+ percpu_write(cpu_tlbstate.active_mm, next);
#endif
+ cpu_set(cpu, next->cpu_vm_mask);
+
+ /* Re-load page tables */
+ load_cr3(next->pgd);
+
+ /*
+ * load the LDT, if the LDT is different:
+ */
+ if (unlikely(prev->context.ldt != next->context.ldt))
+ load_LDT_nolock(&next->context);
+ }
+#ifdef CONFIG_SMP
+ else {
+ percpu_write(cpu_tlbstate.state, TLBSTATE_OK);
+ BUG_ON(percpu_read(cpu_tlbstate.active_mm) != next);
+
+ if (!cpu_test_and_set(cpu, next->cpu_vm_mask)) {
+ /* We were in lazy tlb mode and leave_mm disabled
+ * tlb flush IPI delivery. We must reload CR3
+ * to make sure to use no freed page tables.
+ */
+ load_cr3(next->pgd);
+ load_LDT_nolock(&next->context);
+ }
+ }
+#endif
+}
#define activate_mm(prev, next) \
do { \
@@ -33,5 +77,17 @@ do { \
switch_mm((prev), (next), NULL); \
} while (0);
+#ifdef CONFIG_X86_32
+#define deactivate_mm(tsk, mm) \
+do { \
+ loadsegment(gs, 0) \
+} while (0)
+#else
+#define deactivate_mm(tsk, mm) \
+do { \
+ load_gs_index(0); \
+ loadsegment(fs, 0); \
+} while (0)
+#endif
#endif /* _ASM_X86_MMU_CONTEXT_H */
diff --git a/arch/x86/include/asm/mmu_context_32.h b/arch/x86/include/asm/mmu_context_32.h
deleted file mode 100644
index 08b5345..0000000
--- a/arch/x86/include/asm/mmu_context_32.h
+++ /dev/null
@@ -1,55 +0,0 @@
-#ifndef _ASM_X86_MMU_CONTEXT_32_H
-#define _ASM_X86_MMU_CONTEXT_32_H
-
-static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
-{
-#ifdef CONFIG_SMP
- if (percpu_read(cpu_tlbstate.state) == TLBSTATE_OK)
- percpu_write(cpu_tlbstate.state, TLBSTATE_LAZY);
-#endif
-}
-
-static inline void switch_mm(struct mm_struct *prev,
- struct mm_struct *next,
- struct task_struct *tsk)
-{
- int cpu = smp_processor_id();
-
- if (likely(prev != next)) {
- /* stop flush ipis for the previous mm */
- cpu_clear(cpu, prev->cpu_vm_mask);
-#ifdef CONFIG_SMP
- percpu_write(cpu_tlbstate.state, TLBSTATE_OK);
- percpu_write(cpu_tlbstate.active_mm, next);
-#endif
- cpu_set(cpu, next->cpu_vm_mask);
-
- /* Re-load page tables */
- load_cr3(next->pgd);
-
- /*
- * load the LDT, if the LDT is different:
- */
- if (unlikely(prev->context.ldt != next->context.ldt))
- load_LDT_nolock(&next->context);
- }
-#ifdef CONFIG_SMP
- else {
- percpu_write(cpu_tlbstate.state, TLBSTATE_OK);
- BUG_ON(percpu_read(cpu_tlbstate.active_mm) != next);
-
- if (!cpu_test_and_set(cpu, next->cpu_vm_mask)) {
- /* We were in lazy tlb mode and leave_mm disabled
- * tlb flush IPI delivery. We must reload %cr3.
- */
- load_cr3(next->pgd);
- load_LDT_nolock(&next->context);
- }
- }
-#endif
-}
-
-#define deactivate_mm(tsk, mm) \
- asm("movl %0,%%gs": :"r" (0));
-
-#endif /* _ASM_X86_MMU_CONTEXT_32_H */
diff --git a/arch/x86/include/asm/mmu_context_64.h b/arch/x86/include/asm/mmu_context_64.h
deleted file mode 100644
index c457250..0000000
--- a/arch/x86/include/asm/mmu_context_64.h
+++ /dev/null
@@ -1,52 +0,0 @@
-#ifndef _ASM_X86_MMU_CONTEXT_64_H
-#define _ASM_X86_MMU_CONTEXT_64_H
-
-static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
-{
-#ifdef CONFIG_SMP
- if (percpu_read(cpu_tlbstate.state) == TLBSTATE_OK)
- percpu_write(cpu_tlbstate.state, TLBSTATE_LAZY);
-#endif
-}
-
-static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
- struct task_struct *tsk)
-{
- unsigned cpu = smp_processor_id();
- if (likely(prev != next)) {
- /* stop flush ipis for the previous mm */
- cpu_clear(cpu, prev->cpu_vm_mask);
-#ifdef CONFIG_SMP
- percpu_write(cpu_tlbstate.state, TLBSTATE_OK);
- percpu_write(cpu_tlbstate.active_mm, next);
-#endif
- cpu_set(cpu, next->cpu_vm_mask);
- load_cr3(next->pgd);
-
- if (unlikely(next->context.ldt != prev->context.ldt))
- load_LDT_nolock(&next->context);
- }
-#ifdef CONFIG_SMP
- else {
- percpu_write(cpu_tlbstate.state, TLBSTATE_OK);
- BUG_ON(percpu_read(cpu_tlbstate.active_mm) != next);
-
- if (!cpu_test_and_set(cpu, next->cpu_vm_mask)) {
- /* We were in lazy tlb mode and leave_mm disabled
- * tlb flush IPI delivery. We must reload CR3
- * to make sure to use no freed page tables.
- */
- load_cr3(next->pgd);
- load_LDT_nolock(&next->context);
- }
- }
-#endif
-}
-
-#define deactivate_mm(tsk, mm) \
-do { \
- load_gs_index(0); \
- asm volatile("movl %0,%%fs"::"r"(0)); \
-} while (0)
-
-#endif /* _ASM_X86_MMU_CONTEXT_64_H */
--
1.6.1
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists