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-rw-r--r--arch/arm64/include/asm/compat.h5
-rw-r--r--arch/arm64/include/asm/uaccess.h11
-rw-r--r--arch/arm64/include/asm/unistd32.h10
-rw-r--r--arch/arm64/kernel/cacheinfo.c7
-rw-r--r--arch/arm64/lib/Makefile2
-rw-r--r--arch/arm64/lib/copy_in_user.S77
-rw-r--r--arch/arm64/mm/init.c22
7 files changed, 29 insertions, 105 deletions
diff --git a/arch/arm64/include/asm/compat.h b/arch/arm64/include/asm/compat.h
index 79c1a750e357..eaa6ca062d89 100644
--- a/arch/arm64/include/asm/compat.h
+++ b/arch/arm64/include/asm/compat.h
@@ -107,11 +107,6 @@ struct compat_statfs {
#define compat_user_stack_pointer() (user_stack_pointer(task_pt_regs(current)))
#define COMPAT_MINSIGSTKSZ 2048
-static inline void __user *arch_compat_alloc_user_space(long len)
-{
- return (void __user *)compat_user_stack_pointer() - len;
-}
-
struct compat_ipc64_perm {
compat_key_t key;
__compat_uid32_t uid;
diff --git a/arch/arm64/include/asm/uaccess.h b/arch/arm64/include/asm/uaccess.h
index b5f08621fa29..190b494e22ab 100644
--- a/arch/arm64/include/asm/uaccess.h
+++ b/arch/arm64/include/asm/uaccess.h
@@ -430,17 +430,6 @@ extern unsigned long __must_check __arch_copy_to_user(void __user *to, const voi
__actu_ret; \
})
-extern unsigned long __must_check __arch_copy_in_user(void __user *to, const void __user *from, unsigned long n);
-#define raw_copy_in_user(to, from, n) \
-({ \
- unsigned long __aciu_ret; \
- uaccess_ttbr0_enable(); \
- __aciu_ret = __arch_copy_in_user(__uaccess_mask_ptr(to), \
- __uaccess_mask_ptr(from), (n)); \
- uaccess_ttbr0_disable(); \
- __aciu_ret; \
-})
-
#define INLINE_COPY_TO_USER
#define INLINE_COPY_FROM_USER
diff --git a/arch/arm64/include/asm/unistd32.h b/arch/arm64/include/asm/unistd32.h
index 4e99e4b912ef..844f6ae58662 100644
--- a/arch/arm64/include/asm/unistd32.h
+++ b/arch/arm64/include/asm/unistd32.h
@@ -649,11 +649,11 @@ __SYSCALL(__NR_inotify_add_watch, sys_inotify_add_watch)
#define __NR_inotify_rm_watch 318
__SYSCALL(__NR_inotify_rm_watch, sys_inotify_rm_watch)
#define __NR_mbind 319
-__SYSCALL(__NR_mbind, compat_sys_mbind)
+__SYSCALL(__NR_mbind, sys_mbind)
#define __NR_get_mempolicy 320
-__SYSCALL(__NR_get_mempolicy, compat_sys_get_mempolicy)
+__SYSCALL(__NR_get_mempolicy, sys_get_mempolicy)
#define __NR_set_mempolicy 321
-__SYSCALL(__NR_set_mempolicy, compat_sys_set_mempolicy)
+__SYSCALL(__NR_set_mempolicy, sys_set_mempolicy)
#define __NR_openat 322
__SYSCALL(__NR_openat, compat_sys_openat)
#define __NR_mkdirat 323
@@ -699,7 +699,7 @@ __SYSCALL(__NR_tee, sys_tee)
#define __NR_vmsplice 343
__SYSCALL(__NR_vmsplice, sys_vmsplice)
#define __NR_move_pages 344
-__SYSCALL(__NR_move_pages, compat_sys_move_pages)
+__SYSCALL(__NR_move_pages, sys_move_pages)
#define __NR_getcpu 345
__SYSCALL(__NR_getcpu, sys_getcpu)
#define __NR_epoll_pwait 346
@@ -811,7 +811,7 @@ __SYSCALL(__NR_rseq, sys_rseq)
#define __NR_io_pgetevents 399
__SYSCALL(__NR_io_pgetevents, compat_sys_io_pgetevents)
#define __NR_migrate_pages 400
-__SYSCALL(__NR_migrate_pages, compat_sys_migrate_pages)
+__SYSCALL(__NR_migrate_pages, sys_migrate_pages)
#define __NR_kexec_file_load 401
__SYSCALL(__NR_kexec_file_load, sys_kexec_file_load)
/* 402 is unused */
diff --git a/arch/arm64/kernel/cacheinfo.c b/arch/arm64/kernel/cacheinfo.c
index 7fa6828bb488..587543c6c51c 100644
--- a/arch/arm64/kernel/cacheinfo.c
+++ b/arch/arm64/kernel/cacheinfo.c
@@ -43,7 +43,7 @@ static void ci_leaf_init(struct cacheinfo *this_leaf,
this_leaf->type = type;
}
-static int __init_cache_level(unsigned int cpu)
+int init_cache_level(unsigned int cpu)
{
unsigned int ctype, level, leaves, fw_level;
struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
@@ -78,7 +78,7 @@ static int __init_cache_level(unsigned int cpu)
return 0;
}
-static int __populate_cache_leaves(unsigned int cpu)
+int populate_cache_leaves(unsigned int cpu)
{
unsigned int level, idx;
enum cache_type type;
@@ -97,6 +97,3 @@ static int __populate_cache_leaves(unsigned int cpu)
}
return 0;
}
-
-DEFINE_SMP_CALL_CACHE_FUNCTION(init_cache_level)
-DEFINE_SMP_CALL_CACHE_FUNCTION(populate_cache_leaves)
diff --git a/arch/arm64/lib/Makefile b/arch/arm64/lib/Makefile
index 6dd56a49790a..0941180a86d3 100644
--- a/arch/arm64/lib/Makefile
+++ b/arch/arm64/lib/Makefile
@@ -1,6 +1,6 @@
# SPDX-License-Identifier: GPL-2.0
lib-y := clear_user.o delay.o copy_from_user.o \
- copy_to_user.o copy_in_user.o copy_page.o \
+ copy_to_user.o copy_page.o \
clear_page.o csum.o insn.o memchr.o memcpy.o \
memset.o memcmp.o strcmp.o strncmp.o strlen.o \
strnlen.o strchr.o strrchr.o tishift.o
diff --git a/arch/arm64/lib/copy_in_user.S b/arch/arm64/lib/copy_in_user.S
deleted file mode 100644
index dbea3799c3ef..000000000000
--- a/arch/arm64/lib/copy_in_user.S
+++ /dev/null
@@ -1,77 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Copy from user space to user space
- *
- * Copyright (C) 2012 ARM Ltd.
- */
-
-#include <linux/linkage.h>
-
-#include <asm/asm-uaccess.h>
-#include <asm/assembler.h>
-#include <asm/cache.h>
-
-/*
- * Copy from user space to user space (alignment handled by the hardware)
- *
- * Parameters:
- * x0 - to
- * x1 - from
- * x2 - n
- * Returns:
- * x0 - bytes not copied
- */
- .macro ldrb1 reg, ptr, val
- user_ldst 9998f, ldtrb, \reg, \ptr, \val
- .endm
-
- .macro strb1 reg, ptr, val
- user_ldst 9998f, sttrb, \reg, \ptr, \val
- .endm
-
- .macro ldrh1 reg, ptr, val
- user_ldst 9997f, ldtrh, \reg, \ptr, \val
- .endm
-
- .macro strh1 reg, ptr, val
- user_ldst 9997f, sttrh, \reg, \ptr, \val
- .endm
-
- .macro ldr1 reg, ptr, val
- user_ldst 9997f, ldtr, \reg, \ptr, \val
- .endm
-
- .macro str1 reg, ptr, val
- user_ldst 9997f, sttr, \reg, \ptr, \val
- .endm
-
- .macro ldp1 reg1, reg2, ptr, val
- user_ldp 9997f, \reg1, \reg2, \ptr, \val
- .endm
-
- .macro stp1 reg1, reg2, ptr, val
- user_stp 9997f, \reg1, \reg2, \ptr, \val
- .endm
-
-end .req x5
-srcin .req x15
-SYM_FUNC_START(__arch_copy_in_user)
- add end, x0, x2
- mov srcin, x1
-#include "copy_template.S"
- mov x0, #0
- ret
-SYM_FUNC_END(__arch_copy_in_user)
-EXPORT_SYMBOL(__arch_copy_in_user)
-
- .section .fixup,"ax"
- .align 2
-9997: cmp dst, dstin
- b.ne 9998f
- // Before being absolutely sure we couldn't copy anything, try harder
-USER(9998f, ldtrb tmp1w, [srcin])
-USER(9998f, sttrb tmp1w, [dst])
- add dst, dst, #1
-9998: sub x0, end, dst // bytes not copied
- ret
- .previous
diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index b16be52233c6..37a81754d9b6 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -30,6 +30,7 @@
#include <linux/crash_dump.h>
#include <linux/hugetlb.h>
#include <linux/acpi_iort.h>
+#include <linux/kmemleak.h>
#include <asm/boot.h>
#include <asm/fixmap.h>
@@ -101,6 +102,11 @@ static void __init reserve_crashkernel(void)
pr_info("crashkernel reserved: 0x%016llx - 0x%016llx (%lld MB)\n",
crash_base, crash_base + crash_size, crash_size >> 20);
+ /*
+ * The crashkernel memory will be removed from the kernel linear
+ * map. Inform kmemleak so that it won't try to access it.
+ */
+ kmemleak_ignore_phys(crash_base);
crashk_res.start = crash_base;
crashk_res.end = crash_base + crash_size - 1;
}
@@ -222,7 +228,21 @@ early_param("mem", early_mem);
void __init arm64_memblock_init(void)
{
- const s64 linear_region_size = PAGE_END - _PAGE_OFFSET(vabits_actual);
+ s64 linear_region_size = PAGE_END - _PAGE_OFFSET(vabits_actual);
+
+ /*
+ * Corner case: 52-bit VA capable systems running KVM in nVHE mode may
+ * be limited in their ability to support a linear map that exceeds 51
+ * bits of VA space, depending on the placement of the ID map. Given
+ * that the placement of the ID map may be randomized, let's simply
+ * limit the kernel's linear map to 51 bits as well if we detect this
+ * configuration.
+ */
+ if (IS_ENABLED(CONFIG_KVM) && vabits_actual == 52 &&
+ is_hyp_mode_available() && !is_kernel_in_hyp_mode()) {
+ pr_info("Capping linear region to 51 bits for KVM in nVHE mode on LVA capable hardware.\n");
+ linear_region_size = min_t(u64, linear_region_size, BIT(51));
+ }
/* Remove memory above our supported physical address size */
memblock_remove(1ULL << PHYS_MASK_SHIFT, ULLONG_MAX);
generated by cgit (git 2.34.1) at 2024-06-30 13:30:18 +0000