15 files changed, 125 insertions, 75 deletions

diff --git a/include/asm-generic/Kbuild b/include/asm-generic/Kbuild
index 8675b7b4ad23..295c94a3ccc1 100644
--- a/include/asm-generic/Kbuild
+++ b/include/asm-generic/Kbuild
@@ -59,6 +59,7 @@ mandatory-y += tlbflush.h
 mandatory-y += topology.h
 mandatory-y += trace_clock.h
 mandatory-y += uaccess.h
+mandatory-y += unwind_user.h
 mandatory-y += vermagic.h
 mandatory-y += vga.h
 mandatory-y += video.h
diff --git a/include/asm-generic/codetag.lds.h b/include/asm-generic/codetag.lds.h
index 372c320c5043..a14f4bdafdda 100644
--- a/include/asm-generic/codetag.lds.h
+++ b/include/asm-generic/codetag.lds.h
@@ -2,6 +2,12 @@
 #ifndef __ASM_GENERIC_CODETAG_LDS_H
 #define __ASM_GENERIC_CODETAG_LDS_H
 
+#ifdef CONFIG_MEM_ALLOC_PROFILING
+#define IF_MEM_ALLOC_PROFILING(...) __VA_ARGS__
+#else
+#define IF_MEM_ALLOC_PROFILING(...)
+#endif
+
 #define SECTION_WITH_BOUNDARIES(_name)	\
 	. = ALIGN(8);			\
 	__start_##_name = .;		\
@@ -9,13 +15,7 @@
 	__stop_##_name = .;
 
 #define CODETAG_SECTIONS()		\
-	SECTION_WITH_BOUNDARIES(alloc_tags)
-
-/*
- * Module codetags which aren't used after module unload, therefore have the
- * same lifespan as the module and can be safely unloaded with the module.
- */
-#define MOD_CODETAG_SECTIONS()
+	IF_MEM_ALLOC_PROFILING(SECTION_WITH_BOUNDARIES(alloc_tags))
 
 #define MOD_SEPARATE_CODETAG_SECTION(_name)	\
 	.codetag.##_name : {			\
@@ -28,6 +28,6 @@
  * unload them individually once unused.
  */
 #define MOD_SEPARATE_CODETAG_SECTIONS()		\
-	MOD_SEPARATE_CODETAG_SECTION(alloc_tags)
+	IF_MEM_ALLOC_PROFILING(MOD_SEPARATE_CODETAG_SECTION(alloc_tags))
 
 #endif /* __ASM_GENERIC_CODETAG_LDS_H */
diff --git a/include/asm-generic/hugetlb.h b/include/asm-generic/hugetlb.h
index 2afc95bf1655..dcb8727f2b82 100644
--- a/include/asm-generic/hugetlb.h
+++ b/include/asm-generic/hugetlb.h
@@ -5,11 +5,6 @@
 #include <linux/swap.h>
 #include <linux/swapops.h>
 
-static inline pte_t mk_huge_pte(struct page *page, pgprot_t pgprot)
-{
-	return mk_pte(page, pgprot);
-}
-
 static inline unsigned long huge_pte_write(pte_t pte)
 {
 	return pte_write(pte);
@@ -71,15 +66,6 @@ static inline void huge_pte_clear(struct mm_struct *mm, unsigned long addr,
 }
 #endif
 
-#ifndef __HAVE_ARCH_HUGETLB_FREE_PGD_RANGE
-static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb,
-		unsigned long addr, unsigned long end,
-		unsigned long floor, unsigned long ceiling)
-{
-	free_pgd_range(tlb, addr, end, floor, ceiling);
-}
-#endif
-
 #ifndef __HAVE_ARCH_HUGE_SET_HUGE_PTE_AT
 static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
 		pte_t *ptep, pte_t pte, unsigned long sz)
@@ -119,14 +105,6 @@ static inline int huge_pte_none_mostly(pte_t pte)
 }
 #endif
 
-#ifndef __HAVE_ARCH_PREPARE_HUGEPAGE_RANGE
-static inline int prepare_hugepage_range(struct file *file,
-		unsigned long addr, unsigned long len)
-{
-	return 0;
-}
-#endif
-
 #ifndef __HAVE_ARCH_HUGE_PTEP_SET_WRPROTECT
 static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
 		unsigned long addr, pte_t *ptep)
diff --git a/include/asm-generic/memory_model.h b/include/asm-generic/memory_model.h
index a3b5029aebbd..74d0077cc5fa 100644
--- a/include/asm-generic/memory_model.h
+++ b/include/asm-generic/memory_model.h
@@ -30,7 +30,15 @@ static inline int pfn_valid(unsigned long pfn)
 	return pfn >= pfn_offset && (pfn - pfn_offset) < max_mapnr;
 }
 #define pfn_valid pfn_valid
-#endif
+
+#ifndef for_each_valid_pfn
+#define for_each_valid_pfn(pfn, start_pfn, end_pfn)			 \
+	for ((pfn) = max_t(unsigned long, (start_pfn), ARCH_PFN_OFFSET); \
+	     (pfn) < min_t(unsigned long, (end_pfn),			 \
+			   ARCH_PFN_OFFSET + max_mapnr);		 \
+	     (pfn)++)
+#endif /* for_each_valid_pfn */
+#endif /* valid_pfn */
 
 #elif defined(CONFIG_SPARSEMEM_VMEMMAP)
 
diff --git a/include/asm-generic/module.h b/include/asm-generic/module.h
index 98e1541b72b7..a8622501b975 100644
--- a/include/asm-generic/module.h
+++ b/include/asm-generic/module.h
@@ -19,12 +19,8 @@ struct mod_arch_specific
 #define Elf_Dyn		Elf64_Dyn
 #define Elf_Ehdr	Elf64_Ehdr
 #define Elf_Addr	Elf64_Addr
-#ifdef CONFIG_MODULES_USE_ELF_REL
 #define Elf_Rel		Elf64_Rel
-#endif
-#ifdef CONFIG_MODULES_USE_ELF_RELA
 #define Elf_Rela	Elf64_Rela
-#endif
 #define ELF_R_TYPE(X)	ELF64_R_TYPE(X)
 #define ELF_R_SYM(X)	ELF64_R_SYM(X)
 
@@ -36,12 +32,8 @@ struct mod_arch_specific
 #define Elf_Dyn		Elf32_Dyn
 #define Elf_Ehdr	Elf32_Ehdr
 #define Elf_Addr	Elf32_Addr
-#ifdef CONFIG_MODULES_USE_ELF_REL
 #define Elf_Rel		Elf32_Rel
-#endif
-#ifdef CONFIG_MODULES_USE_ELF_RELA
 #define Elf_Rela	Elf32_Rela
-#endif
 #define ELF_R_TYPE(X)	ELF32_R_TYPE(X)
 #define ELF_R_SYM(X)	ELF32_R_SYM(X)
 #endif
diff --git a/include/asm-generic/mshyperv.h b/include/asm-generic/mshyperv.h
index ccccb1cbf7df..a729b77983fa 100644
--- a/include/asm-generic/mshyperv.h
+++ b/include/asm-generic/mshyperv.h
@@ -236,10 +236,6 @@ int hv_common_cpu_init(unsigned int cpu);
 int hv_common_cpu_die(unsigned int cpu);
 void hv_identify_partition_type(void);
 
-void *hv_alloc_hyperv_page(void);
-void *hv_alloc_hyperv_zeroed_page(void);
-void hv_free_hyperv_page(void *addr);
-
 /**
  * hv_cpu_number_to_vp_number() - Map CPU to VP.
  * @cpu_number: CPU number in Linux terms
@@ -378,4 +374,10 @@ static inline int hv_call_create_vp(int node, u64 partition_id, u32 vp_index, u3
 }
 #endif /* CONFIG_MSHV_ROOT */
 
+#if IS_ENABLED(CONFIG_HYPERV_VTL_MODE)
+u8 __init get_vtl(void);
+#else
+static inline u8 get_vtl(void) { return 0; }
+#endif
+
 #endif
diff --git a/include/asm-generic/msi.h b/include/asm-generic/msi.h
index 124c734ca5d9..92cca4b23f13 100644
--- a/include/asm-generic/msi.h
+++ b/include/asm-generic/msi.h
@@ -33,6 +33,7 @@ typedef struct msi_alloc_info {
 
 /* Device generating MSIs is proxying for another device */
 #define MSI_ALLOC_FLAGS_PROXY_DEVICE	(1UL << 0)
+#define MSI_ALLOC_FLAGS_FIXED_MSG_DATA	(1UL << 1)
 
 #define GENERIC_MSI_DOMAIN_OPS		1
 
diff --git a/include/asm-generic/param.h b/include/asm-generic/param.h
index 8d3009dd28ff..8348c116aa3b 100644
--- a/include/asm-generic/param.h
+++ b/include/asm-generic/param.h
@@ -6,6 +6,6 @@
 
 # undef HZ
 # define HZ		CONFIG_HZ	/* Internal kernel timer frequency */
-# define USER_HZ	100		/* some user interfaces are */
+# define USER_HZ	__USER_HZ	/* some user interfaces are */
 # define CLOCKS_PER_SEC	(USER_HZ)       /* in "ticks" like times() */
 #endif /* __ASM_GENERIC_PARAM_H */
diff --git a/include/asm-generic/pgalloc.h b/include/asm-generic/pgalloc.h
index 892ece4558a2..3c8ec3bfea44 100644
--- a/include/asm-generic/pgalloc.h
+++ b/include/asm-generic/pgalloc.h
@@ -23,6 +23,11 @@ static inline pte_t *__pte_alloc_one_kernel_noprof(struct mm_struct *mm)
 
 	if (!ptdesc)
 		return NULL;
+	if (!pagetable_pte_ctor(mm, ptdesc)) {
+		pagetable_free(ptdesc);
+		return NULL;
+	}
+
 	return ptdesc_address(ptdesc);
 }
 #define __pte_alloc_one_kernel(...)	alloc_hooks(__pte_alloc_one_kernel_noprof(__VA_ARGS__))
@@ -48,7 +53,7 @@ static inline pte_t *pte_alloc_one_kernel_noprof(struct mm_struct *mm)
  */
 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
 {
-	pagetable_free(virt_to_ptdesc(pte));
+	pagetable_dtor_free(virt_to_ptdesc(pte));
 }
 
 /**
@@ -70,7 +75,7 @@ static inline pgtable_t __pte_alloc_one_noprof(struct mm_struct *mm, gfp_t gfp)
 	ptdesc = pagetable_alloc_noprof(gfp, 0);
 	if (!ptdesc)
 		return NULL;
-	if (!pagetable_pte_ctor(ptdesc)) {
+	if (!pagetable_pte_ctor(mm, ptdesc)) {
 		pagetable_free(ptdesc);
 		return NULL;
 	}
@@ -137,7 +142,7 @@ static inline pmd_t *pmd_alloc_one_noprof(struct mm_struct *mm, unsigned long ad
 	ptdesc = pagetable_alloc_noprof(gfp, 0);
 	if (!ptdesc)
 		return NULL;
-	if (!pagetable_pmd_ctor(ptdesc)) {
+	if (!pagetable_pmd_ctor(mm, ptdesc)) {
 		pagetable_free(ptdesc);
 		return NULL;
 	}
diff --git a/include/asm-generic/simd.h b/include/asm-generic/simd.h
index d0343d58a74a..70c8716ad32a 100644
--- a/include/asm-generic/simd.h
+++ b/include/asm-generic/simd.h
@@ -1,6 +1,11 @@
 /* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_GENERIC_SIMD_H
+#define _ASM_GENERIC_SIMD_H
 
-#include <linux/hardirq.h>
+#include <linux/compiler_attributes.h>
+#include <linux/preempt.h>
+#include <linux/sched.h>
+#include <linux/types.h>
 
 /*
  * may_use_simd - whether it is allowable at this time to issue SIMD
@@ -13,3 +18,5 @@ static __must_check inline bool may_use_simd(void)
 {
 	return !in_interrupt();
 }
+
+#endif	/* _ASM_GENERIC_SIMD_H */
diff --git a/include/asm-generic/syscall.h b/include/asm-generic/syscall.h
index 182b039ce5fa..c5a3ad53beec 100644
--- a/include/asm-generic/syscall.h
+++ b/include/asm-generic/syscall.h
@@ -38,6 +38,20 @@ struct pt_regs;
 int syscall_get_nr(struct task_struct *task, struct pt_regs *regs);
 
 /**
+ * syscall_set_nr - change the system call a task is executing
+ * @task:	task of interest, must be blocked
+ * @regs:	task_pt_regs() of @task
+ * @nr:		system call number
+ *
+ * Changes the system call number @task is about to execute.
+ *
+ * It's only valid to call this when @task is stopped for tracing on
+ * entry to a system call, due to %SYSCALL_WORK_SYSCALL_TRACE or
+ * %SYSCALL_WORK_SYSCALL_AUDIT.
+ */
+void syscall_set_nr(struct task_struct *task, struct pt_regs *regs, int nr);
+
+/**
  * syscall_rollback - roll back registers after an aborted system call
  * @task:	task of interest, must be in system call exit tracing
  * @regs:	task_pt_regs() of @task
@@ -118,6 +132,22 @@ void syscall_get_arguments(struct task_struct *task, struct pt_regs *regs,
 			   unsigned long *args);
 
 /**
+ * syscall_set_arguments - change system call parameter value
+ * @task:	task of interest, must be in system call entry tracing
+ * @regs:	task_pt_regs() of @task
+ * @args:	array of argument values to store
+ *
+ * Changes 6 arguments to the system call.
+ * The first argument gets value @args[0], and so on.
+ *
+ * It's only valid to call this when @task is stopped for tracing on
+ * entry to a system call, due to %SYSCALL_WORK_SYSCALL_TRACE or
+ * %SYSCALL_WORK_SYSCALL_AUDIT.
+ */
+void syscall_set_arguments(struct task_struct *task, struct pt_regs *regs,
+			   const unsigned long *args);
+
+/**
  * syscall_get_arch - return the AUDIT_ARCH for the current system call
  * @task:	task of interest, must be blocked
  *
diff --git a/include/asm-generic/tlb.h b/include/asm-generic/tlb.h
index d1adfba8387e..1fff717cae51 100644
--- a/include/asm-generic/tlb.h
+++ b/include/asm-generic/tlb.h
@@ -58,6 +58,11 @@
  *    Defaults to flushing at tlb_end_vma() to reset the range; helps when
  *    there's large holes between the VMAs.
  *
+ *  - tlb_free_vmas()
+ *
+ *    tlb_free_vmas() marks the start of unlinking of one or more vmas
+ *    and freeing page-tables.
+ *
  *  - tlb_remove_table()
  *
  *    tlb_remove_table() is the basic primitive to free page-table directories
@@ -227,10 +232,10 @@ static inline void tlb_remove_page(struct mmu_gather *tlb, struct page *page);
  */
 static inline void tlb_remove_table(struct mmu_gather *tlb, void *table)
 {
-	struct page *page = (struct page *)table;
+	struct ptdesc *ptdesc = (struct ptdesc *)table;
 
-	pagetable_dtor(page_ptdesc(page));
-	tlb_remove_page(tlb, page);
+	pagetable_dtor(ptdesc);
+	tlb_remove_page(tlb, ptdesc_page(ptdesc));
 }
 #endif /* CONFIG_MMU_GATHER_TABLE_FREE */
 
@@ -464,7 +469,12 @@ tlb_update_vma_flags(struct mmu_gather *tlb, struct vm_area_struct *vma)
 	 */
 	tlb->vma_huge = is_vm_hugetlb_page(vma);
 	tlb->vma_exec = !!(vma->vm_flags & VM_EXEC);
-	tlb->vma_pfn  = !!(vma->vm_flags & (VM_PFNMAP|VM_MIXEDMAP));
+
+	/*
+	 * Track if there's at least one VM_PFNMAP/VM_MIXEDMAP vma
+	 * in the tracked range, see tlb_free_vmas().
+	 */
+	tlb->vma_pfn |= !!(vma->vm_flags & (VM_PFNMAP|VM_MIXEDMAP));
 }
 
 static inline void tlb_flush_mmu_tlbonly(struct mmu_gather *tlb)
@@ -493,17 +503,11 @@ static inline void tlb_remove_page(struct mmu_gather *tlb, struct page *page)
 	return tlb_remove_page_size(tlb, page, PAGE_SIZE);
 }
 
-static inline void tlb_remove_ptdesc(struct mmu_gather *tlb, void *pt)
+static inline void tlb_remove_ptdesc(struct mmu_gather *tlb, struct ptdesc *pt)
 {
 	tlb_remove_table(tlb, pt);
 }
 
-/* Like tlb_remove_ptdesc, but for page-like page directories. */
-static inline void tlb_remove_page_ptdesc(struct mmu_gather *tlb, struct ptdesc *pt)
-{
-	tlb_remove_page(tlb, ptdesc_page(pt));
-}
-
 static inline void tlb_change_page_size(struct mmu_gather *tlb,
 						     unsigned int page_size)
 {
@@ -554,22 +558,38 @@ static inline void tlb_start_vma(struct mmu_gather *tlb, struct vm_area_struct *
 
 static inline void tlb_end_vma(struct mmu_gather *tlb, struct vm_area_struct *vma)
 {
+	if (tlb->fullmm || IS_ENABLED(CONFIG_MMU_GATHER_MERGE_VMAS))
+		return;
+
+	/*
+	 * Do a TLB flush and reset the range at VMA boundaries; this avoids
+	 * the ranges growing with the unused space between consecutive VMAs,
+	 * but also the mmu_gather::vma_* flags from tlb_start_vma() rely on
+	 * this.
+	 */
+	tlb_flush_mmu_tlbonly(tlb);
+}
+
+static inline void tlb_free_vmas(struct mmu_gather *tlb)
+{
 	if (tlb->fullmm)
 		return;
 
 	/*
 	 * VM_PFNMAP is more fragile because the core mm will not track the
-	 * page mapcount -- there might not be page-frames for these PFNs after
-	 * all. Force flush TLBs for such ranges to avoid munmap() vs
-	 * unmap_mapping_range() races.
+	 * page mapcount -- there might not be page-frames for these PFNs
+	 * after all.
+	 *
+	 * Specifically() there is a race between munmap() and
+	 * unmap_mapping_range(), where munmap() will unlink the VMA, such
+	 * that unmap_mapping_range() will no longer observe the VMA and
+	 * no-op, without observing the TLBI, returning prematurely.
+	 *
+	 * So if we're about to unlink such a VMA, and we have pending
+	 * TLBI for such a vma, flush things now.
 	 */
-	if (tlb->vma_pfn || !IS_ENABLED(CONFIG_MMU_GATHER_MERGE_VMAS)) {
-		/*
-		 * Do a TLB flush and reset the range at VMA boundaries; this avoids
-		 * the ranges growing with the unused space between consecutive VMAs.
-		 */
+	if (tlb->vma_pfn)
 		tlb_flush_mmu_tlbonly(tlb);
-	}
 }
 
 /*
diff --git a/include/asm-generic/unwind_user.h b/include/asm-generic/unwind_user.h
new file mode 100644
index 000000000000..b8882b909944
--- /dev/null
+++ b/include/asm-generic/unwind_user.h
@@ -0,0 +1,5 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_GENERIC_UNWIND_USER_H
+#define _ASM_GENERIC_UNWIND_USER_H
+
+#endif /* _ASM_GENERIC_UNWIND_USER_H */
diff --git a/include/asm-generic/vdso/vsyscall.h b/include/asm-generic/vdso/vsyscall.h
index b550afa15ecd..7fc0b560007d 100644
--- a/include/asm-generic/vdso/vsyscall.h
+++ b/include/asm-generic/vdso/vsyscall.h
@@ -22,11 +22,11 @@ static __always_inline const struct vdso_rng_data *__arch_get_vdso_u_rng_data(vo
 
 #endif /* CONFIG_GENERIC_VDSO_DATA_STORE */
 
-#ifndef __arch_update_vsyscall
-static __always_inline void __arch_update_vsyscall(struct vdso_time_data *vdata)
+#ifndef __arch_update_vdso_clock
+static __always_inline void __arch_update_vdso_clock(struct vdso_clock *vc)
 {
 }
-#endif /* __arch_update_vsyscall */
+#endif /* __arch_update_vdso_clock */
 
 #ifndef __arch_sync_vdso_time_data
 static __always_inline void __arch_sync_vdso_time_data(struct vdso_time_data *vdata)
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 58a635a6d5bd..ae2d2359b79e 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -108,13 +108,13 @@ defined(CONFIG_AUTOFDO_CLANG) || defined(CONFIG_PROPELLER_CLANG)
 #define TEXT_MAIN .text
 #endif
 #if defined(CONFIG_LD_DEAD_CODE_DATA_ELIMINATION) || defined(CONFIG_LTO_CLANG)
-#define DATA_MAIN .data .data.[0-9a-zA-Z_]* .data..L* .data..compoundliteral* .data.$__unnamed_* .data.$L*
+#define DATA_MAIN .data .data.[0-9a-zA-Z_]* .data.rel.* .data..L* .data..compoundliteral* .data.$__unnamed_* .data.$L*
 #define SDATA_MAIN .sdata .sdata.[0-9a-zA-Z_]*
 #define RODATA_MAIN .rodata .rodata.[0-9a-zA-Z_]* .rodata..L*
 #define BSS_MAIN .bss .bss.[0-9a-zA-Z_]* .bss..L* .bss..compoundliteral*
 #define SBSS_MAIN .sbss .sbss.[0-9a-zA-Z_]*
 #else
-#define DATA_MAIN .data
+#define DATA_MAIN .data .data.rel .data.rel.local
 #define SDATA_MAIN .sdata
 #define RODATA_MAIN .rodata
 #define BSS_MAIN .bss
@@ -167,7 +167,7 @@ defined(CONFIG_AUTOFDO_CLANG) || defined(CONFIG_PROPELLER_CLANG)
 #define FTRACE_STUB_HACK
 #endif
 
-#ifdef CONFIG_FTRACE_MCOUNT_RECORD
+#ifdef CONFIG_DYNAMIC_FTRACE
 /*
  * The ftrace call sites are logged to a section whose name depends on the
  * compiler option used. A given kernel image will only use one, AKA
@@ -667,10 +667,11 @@ defined(CONFIG_AUTOFDO_CLANG) || defined(CONFIG_PROPELLER_CLANG)
  */
 #ifdef CONFIG_DEBUG_INFO_BTF
 #define BTF								\
+	. = ALIGN(PAGE_SIZE);						\
 	.BTF : AT(ADDR(.BTF) - LOAD_OFFSET) {				\
 		BOUNDED_SECTION_BY(.BTF, _BTF)				\
 	}								\
-	. = ALIGN(4);							\
+	. = ALIGN(PAGE_SIZE);						\
 	.BTF_ids : AT(ADDR(.BTF_ids) - LOAD_OFFSET) {			\
 		*(.BTF_ids)						\
 	}