Merge branch 'x86/mm' into efi/core, to pick up dependencies

Signed-off-by: Ingo Molnar <[email protected]>

arch/alpha/include/asm/vmalloc.h

@@ -0,0 +1,4 @@
+#ifndef _ASM_ALPHA_VMALLOC_H
+#define _ASM_ALPHA_VMALLOC_H
+
+#endif /* _ASM_ALPHA_VMALLOC_H */

arch/arc/include/asm/vmalloc.h

@@ -0,0 +1,4 @@
+#ifndef _ASM_ARC_VMALLOC_H
+#define _ASM_ARC_VMALLOC_H
+
+#endif /* _ASM_ARC_VMALLOC_H */

arch/arm/include/asm/vmalloc.h

@@ -0,0 +1,4 @@
+#ifndef _ASM_ARM_VMALLOC_H
+#define _ASM_ARM_VMALLOC_H
+
+#endif /* _ASM_ARM_VMALLOC_H */

arch/arm64/include/asm/vmalloc.h

@@ -0,0 +1,4 @@
+#ifndef _ASM_ARM64_VMALLOC_H
+#define _ASM_ARM64_VMALLOC_H
+
+#endif /* _ASM_ARM64_VMALLOC_H */

arch/c6x/include/asm/vmalloc.h

@@ -0,0 +1,4 @@
+#ifndef _ASM_C6X_VMALLOC_H
+#define _ASM_C6X_VMALLOC_H
+
+#endif /* _ASM_C6X_VMALLOC_H */

arch/csky/include/asm/vmalloc.h

@@ -0,0 +1,4 @@
+#ifndef _ASM_CSKY_VMALLOC_H
+#define _ASM_CSKY_VMALLOC_H
+
+#endif /* _ASM_CSKY_VMALLOC_H */

arch/h8300/include/asm/vmalloc.h

@@ -0,0 +1,4 @@
+#ifndef _ASM_H8300_VMALLOC_H
+#define _ASM_H8300_VMALLOC_H
+
+#endif /* _ASM_H8300_VMALLOC_H */

arch/hexagon/include/asm/vmalloc.h

@@ -0,0 +1,4 @@
+#ifndef _ASM_HEXAGON_VMALLOC_H
+#define _ASM_HEXAGON_VMALLOC_H
+
+#endif /* _ASM_HEXAGON_VMALLOC_H */

arch/ia64/include/asm/vmalloc.h

@@ -0,0 +1,4 @@
+#ifndef _ASM_IA64_VMALLOC_H
+#define _ASM_IA64_VMALLOC_H
+
+#endif /* _ASM_IA64_VMALLOC_H */

arch/m68k/include/asm/vmalloc.h

@@ -0,0 +1,4 @@
+#ifndef _ASM_M68K_VMALLOC_H
+#define _ASM_M68K_VMALLOC_H
+
+#endif /* _ASM_M68K_VMALLOC_H */

arch/microblaze/include/asm/vmalloc.h

@@ -0,0 +1,4 @@
+#ifndef _ASM_MICROBLAZE_VMALLOC_H
+#define _ASM_MICROBLAZE_VMALLOC_H
+
+#endif /* _ASM_MICROBLAZE_VMALLOC_H */

arch/mips/include/asm/vmalloc.h

@@ -0,0 +1,4 @@
+#ifndef _ASM_MIPS_VMALLOC_H
+#define _ASM_MIPS_VMALLOC_H
+
+#endif /* _ASM_MIPS_VMALLOC_H */

arch/nds32/include/asm/vmalloc.h

@@ -0,0 +1,4 @@
+#ifndef _ASM_NDS32_VMALLOC_H
+#define _ASM_NDS32_VMALLOC_H
+
+#endif /* _ASM_NDS32_VMALLOC_H */

arch/nios2/include/asm/vmalloc.h

@@ -0,0 +1,4 @@
+#ifndef _ASM_NIOS2_VMALLOC_H
+#define _ASM_NIOS2_VMALLOC_H
+
+#endif /* _ASM_NIOS2_VMALLOC_H */

arch/openrisc/include/asm/vmalloc.h

@@ -0,0 +1,4 @@
+#ifndef _ASM_OPENRISC_VMALLOC_H
+#define _ASM_OPENRISC_VMALLOC_H
+
+#endif /* _ASM_OPENRISC_VMALLOC_H */

arch/parisc/include/asm/vmalloc.h

@@ -0,0 +1,4 @@
+#ifndef _ASM_PARISC_VMALLOC_H
+#define _ASM_PARISC_VMALLOC_H
+
+#endif /* _ASM_PARISC_VMALLOC_H */

arch/powerpc/include/asm/vmalloc.h

@@ -0,0 +1,4 @@
+#ifndef _ASM_POWERPC_VMALLOC_H
+#define _ASM_POWERPC_VMALLOC_H
+
+#endif /* _ASM_POWERPC_VMALLOC_H */

arch/riscv/include/asm/vmalloc.h

@@ -0,0 +1,4 @@
+#ifndef _ASM_RISCV_VMALLOC_H
+#define _ASM_RISCV_VMALLOC_H
+
+#endif /* _ASM_RISCV_VMALLOC_H */

arch/s390/include/asm/vmalloc.h

@@ -0,0 +1,4 @@
+#ifndef _ASM_S390_VMALLOC_H
+#define _ASM_S390_VMALLOC_H
+
+#endif /* _ASM_S390_VMALLOC_H */

arch/sh/include/asm/vmalloc.h

@@ -0,0 +1,4 @@
+#ifndef _ASM_SH_VMALLOC_H
+#define _ASM_SH_VMALLOC_H
+
+#endif /* _ASM_SH_VMALLOC_H */

arch/sparc/include/asm/vmalloc.h

@@ -0,0 +1,4 @@
+#ifndef _ASM_SPARC_VMALLOC_H
+#define _ASM_SPARC_VMALLOC_H
+
+#endif /* _ASM_SPARC_VMALLOC_H */

arch/um/include/asm/vmalloc.h

@@ -0,0 +1,4 @@
+#ifndef _ASM_UM_VMALLOC_H
+#define _ASM_UM_VMALLOC_H
+
+#endif /* _ASM_UM_VMALLOC_H */

arch/unicore32/include/asm/vmalloc.h

@@ -0,0 +1,4 @@
+#ifndef _ASM_UNICORE32_VMALLOC_H
+#define _ASM_UNICORE32_VMALLOC_H
+
+#endif /* _ASM_UNICORE32_VMALLOC_H */

arch/x86/Kconfig

@@ -1512,7 +1512,7 @@ config X86_CPA_STATISTICS
 	bool "Enable statistic for Change Page Attribute"
 	depends on DEBUG_FS
 	---help---
-	  Expose statistics about the Change Page Attribute mechanims, which
+	  Expose statistics about the Change Page Attribute mechanism, which
 	  helps to determine the effectiveness of preserving large and huge
 	  page mappings when mapping protections are changed.
 

arch/x86/include/asm/cpu_entry_area.h

@@ -6,6 +6,7 @@
 #include <linux/percpu-defs.h>
 #include <asm/processor.h>
 #include <asm/intel_ds.h>
+#include <asm/pgtable_areas.h>
 
 #ifdef CONFIG_X86_64
 
@@ -134,15 +135,6 @@ DECLARE_PER_CPU(struct cea_exception_stacks *, cea_exception_stacks);
 extern void setup_cpu_entry_areas(void);
 extern void cea_set_pte(void *cea_vaddr, phys_addr_t pa, pgprot_t flags);
 
-/* Single page reserved for the readonly IDT mapping: */
-#define	CPU_ENTRY_AREA_RO_IDT		CPU_ENTRY_AREA_BASE
-#define CPU_ENTRY_AREA_PER_CPU		(CPU_ENTRY_AREA_RO_IDT + PAGE_SIZE)
-
-#define CPU_ENTRY_AREA_RO_IDT_VADDR	((void *)CPU_ENTRY_AREA_RO_IDT)
-
-#define CPU_ENTRY_AREA_MAP_SIZE			\
-	(CPU_ENTRY_AREA_PER_CPU + CPU_ENTRY_AREA_ARRAY_SIZE - CPU_ENTRY_AREA_BASE)
-
 extern struct cpu_entry_area *get_cpu_entry_area(int cpu);
 
 static inline struct entry_stack *cpu_entry_stack(int cpu)

arch/x86/include/asm/memtype.h

@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_X86_MEMTYPE_H
+#define _ASM_X86_MEMTYPE_H
+
+#include <linux/types.h>
+#include <asm/pgtable_types.h>
+
+extern bool pat_enabled(void);
+extern void pat_disable(const char *reason);
+extern void pat_init(void);
+extern void init_cache_modes(void);
+
+extern int memtype_reserve(u64 start, u64 end,
+		enum page_cache_mode req_pcm, enum page_cache_mode *ret_pcm);
+extern int memtype_free(u64 start, u64 end);
+
+extern int memtype_kernel_map_sync(u64 base, unsigned long size,
+		enum page_cache_mode pcm);
+
+extern int memtype_reserve_io(resource_size_t start, resource_size_t end,
+			enum page_cache_mode *pcm);
+
+extern void memtype_free_io(resource_size_t start, resource_size_t end);
+
+extern bool pat_pfn_immune_to_uc_mtrr(unsigned long pfn);
+
+#endif /* _ASM_X86_MEMTYPE_H */

arch/x86/include/asm/mmu_context.h

@@ -69,14 +69,6 @@ struct ldt_struct {
 	int			slot;
 };
 
-/* This is a multiple of PAGE_SIZE. */
-#define LDT_SLOT_STRIDE (LDT_ENTRIES * LDT_ENTRY_SIZE)
-
-static inline void *ldt_slot_va(int slot)
-{
-	return (void *)(LDT_BASE_ADDR + LDT_SLOT_STRIDE * slot);
-}
-
 /*
  * Used for LDT copy/destruction.
  */
@@ -99,87 +91,21 @@ static inline void destroy_context_ldt(struct mm_struct *mm) { }
 static inline void ldt_arch_exit_mmap(struct mm_struct *mm) { }
 #endif
 
-static inline void load_mm_ldt(struct mm_struct *mm)
-{
 #ifdef CONFIG_MODIFY_LDT_SYSCALL
-	struct ldt_struct *ldt;
-
-	/* READ_ONCE synchronizes with smp_store_release */
-	ldt = READ_ONCE(mm->context.ldt);
-
-	/*
-	 * Any change to mm->context.ldt is followed by an IPI to all
-	 * CPUs with the mm active.  The LDT will not be freed until
-	 * after the IPI is handled by all such CPUs.  This means that,
-	 * if the ldt_struct changes before we return, the values we see
-	 * will be safe, and the new values will be loaded before we run
-	 * any user code.
-	 *
-	 * NB: don't try to convert this to use RCU without extreme care.
-	 * We would still need IRQs off, because we don't want to change
-	 * the local LDT after an IPI loaded a newer value than the one
-	 * that we can see.
-	 */
-
-	if (unlikely(ldt)) {
-		if (static_cpu_has(X86_FEATURE_PTI)) {
-			if (WARN_ON_ONCE((unsigned long)ldt->slot > 1)) {
-				/*
-				 * Whoops -- either the new LDT isn't mapped
-				 * (if slot == -1) or is mapped into a bogus
-				 * slot (if slot > 1).
-				 */
-				clear_LDT();
-				return;
-			}
-
-			/*
-			 * If page table isolation is enabled, ldt->entries
-			 * will not be mapped in the userspace pagetables.
-			 * Tell the CPU to access the LDT through the alias
-			 * at ldt_slot_va(ldt->slot).
-			 */
-			set_ldt(ldt_slot_va(ldt->slot), ldt->nr_entries);
-		} else {
-			set_ldt(ldt->entries, ldt->nr_entries);
-		}
-	} else {
-		clear_LDT();
-	}
+extern void load_mm_ldt(struct mm_struct *mm);
+extern void switch_ldt(struct mm_struct *prev, struct mm_struct *next);
 #else
+static inline void load_mm_ldt(struct mm_struct *mm)
+{
 	clear_LDT();
-#endif
 }
-
 static inline void switch_ldt(struct mm_struct *prev, struct mm_struct *next)
 {
-#ifdef CONFIG_MODIFY_LDT_SYSCALL
-	/*
-	 * Load the LDT if either the old or new mm had an LDT.
-	 *
-	 * An mm will never go from having an LDT to not having an LDT.  Two
-	 * mms never share an LDT, so we don't gain anything by checking to
-	 * see whether the LDT changed.  There's also no guarantee that
-	 * prev->context.ldt actually matches LDTR, but, if LDTR is non-NULL,
-	 * then prev->context.ldt will also be non-NULL.
-	 *
-	 * If we really cared, we could optimize the case where prev == next
-	 * and we're exiting lazy mode.  Most of the time, if this happens,
-	 * we don't actually need to reload LDTR, but modify_ldt() is mostly
-	 * used by legacy code and emulators where we don't need this level of
-	 * performance.
-	 *
-	 * This uses | instead of || because it generates better code.
-	 */
-	if (unlikely((unsigned long)prev->context.ldt |
-		     (unsigned long)next->context.ldt))
-		load_mm_ldt(next);
-#endif
-
 	DEBUG_LOCKS_WARN_ON(preemptible());
 }
+#endif
 
-void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk);
+extern void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk);
 
 /*
  * Init a new mm.  Used on mm copies, like at fork()

arch/x86/include/asm/mtrr.h

@@ -24,7 +24,7 @@
 #define _ASM_X86_MTRR_H
 
 #include <uapi/asm/mtrr.h>
-#include <asm/pat.h>
+#include <asm/memtype.h>
 
 
 /*
@@ -86,7 +86,7 @@ static inline void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi)
 }
 static inline void mtrr_bp_init(void)
 {
-	pat_disable("MTRRs disabled, skipping PAT initialization too.");
+	pat_disable("PAT support disabled because CONFIG_MTRR is disabled in the kernel.");
 }
 
 #define mtrr_ap_init() do {} while (0)

arch/x86/include/asm/pci.h

@@ -9,7 +9,7 @@
 #include <linux/scatterlist.h>
 #include <linux/numa.h>
 #include <asm/io.h>
-#include <asm/pat.h>
+#include <asm/memtype.h>
 #include <asm/x86_init.h>
 
 struct pci_sysdata {

arch/x86/include/asm/pgtable_32_areas.h

@@ -0,0 +1,53 @@
+#ifndef _ASM_X86_PGTABLE_32_AREAS_H
+#define _ASM_X86_PGTABLE_32_AREAS_H
+
+#include <asm/cpu_entry_area.h>
+
+/*
+ * Just any arbitrary offset to the start of the vmalloc VM area: the
+ * current 8MB value just means that there will be a 8MB "hole" after the
+ * physical memory until the kernel virtual memory starts.  That means that
+ * any out-of-bounds memory accesses will hopefully be caught.
+ * The vmalloc() routines leaves a hole of 4kB between each vmalloced
+ * area for the same reason. ;)
+ */
+#define VMALLOC_OFFSET	(8 * 1024 * 1024)
+
+#ifndef __ASSEMBLY__
+extern bool __vmalloc_start_set; /* set once high_memory is set */
+#endif
+
+#define VMALLOC_START	((unsigned long)high_memory + VMALLOC_OFFSET)
+#ifdef CONFIG_X86_PAE
+#define LAST_PKMAP 512
+#else
+#define LAST_PKMAP 1024
+#endif
+
+#define CPU_ENTRY_AREA_PAGES		(NR_CPUS * DIV_ROUND_UP(sizeof(struct cpu_entry_area), PAGE_SIZE))
+
+/* The +1 is for the readonly IDT page: */
+#define CPU_ENTRY_AREA_BASE	\
+	((FIXADDR_TOT_START - PAGE_SIZE*(CPU_ENTRY_AREA_PAGES+1)) & PMD_MASK)
+
+#define LDT_BASE_ADDR		\
+	((CPU_ENTRY_AREA_BASE - PAGE_SIZE) & PMD_MASK)
+
+#define LDT_END_ADDR		(LDT_BASE_ADDR + PMD_SIZE)
+
+#define PKMAP_BASE		\
+	((LDT_BASE_ADDR - PAGE_SIZE) & PMD_MASK)
+
+#ifdef CONFIG_HIGHMEM
+# define VMALLOC_END	(PKMAP_BASE - 2 * PAGE_SIZE)
+#else
+# define VMALLOC_END	(LDT_BASE_ADDR - 2 * PAGE_SIZE)
+#endif
+
+#define MODULES_VADDR	VMALLOC_START
+#define MODULES_END	VMALLOC_END
+#define MODULES_LEN	(MODULES_VADDR - MODULES_END)
+
+#define MAXMEM	(VMALLOC_END - PAGE_OFFSET - __VMALLOC_RESERVE)
+
+#endif /* _ASM_X86_PGTABLE_32_AREAS_H */