Increase debug options (incl. kasan patch)
Signed-off-by: David Abdurachmanov <david.abdurachmanov@sifive.com>
This commit is contained in:
parent
af8982f0b6
commit
5240067ec0
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@ -1 +1 @@
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CONFIG_CMDLINE="console=ttySIF0 earlycon rw rootwait root=/dev/mmcblk0p4 LANG=en_US.UTF-8"
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CONFIG_CMDLINE="console=ttySIF0 earlycon rw rootwait root=/dev/mmcblk0p4 debug ignore_loglevel LANG=en_US.UTF-8"
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@ -0,0 +1 @@
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CONFIG_KASAN=y
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@ -738,7 +738,7 @@ CONFIG_CM3605=m
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# CONFIG_CM36651 is not set
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# CONFIG_CMA is not set
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# CONFIG_CMDLINE_BOOL is not set
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CONFIG_CMDLINE="console=ttySIF0 earlycon rw rootwait root=/dev/mmcblk0p4 LANG=en_US.UTF-8"
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CONFIG_CMDLINE="console=ttySIF0 earlycon rw rootwait root=/dev/mmcblk0p4 debug ignore_loglevel LANG=en_US.UTF-8"
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# CONFIG_CMDLINE_EXTEND is not set
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CONFIG_CMDLINE_FALLBACK=y
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# CONFIG_CMDLINE_FORCE is not set
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@ -2371,7 +2371,7 @@ CONFIG_JUMP_LABEL=y
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CONFIG_KALLSYMS_ALL=y
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CONFIG_KALLSYMS=y
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CONFIG_KARMA_PARTITION=y
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# CONFIG_KASAN is not set
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CONFIG_KASAN=y
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# CONFIG_KCOV is not set
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CONFIG_KDB_CONTINUE_CATASTROPHIC=0
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CONFIG_KDB_DEFAULT_ENABLE=0x0
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@ -737,7 +737,7 @@ CONFIG_CM3605=m
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# CONFIG_CM36651 is not set
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# CONFIG_CMA is not set
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# CONFIG_CMDLINE_BOOL is not set
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CONFIG_CMDLINE="console=ttySIF0 earlycon rw rootwait root=/dev/mmcblk0p4 LANG=en_US.UTF-8"
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CONFIG_CMDLINE="console=ttySIF0 earlycon rw rootwait root=/dev/mmcblk0p4 debug ignore_loglevel LANG=en_US.UTF-8"
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# CONFIG_CMDLINE_EXTEND is not set
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CONFIG_CMDLINE_FALLBACK=y
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# CONFIG_CMDLINE_FORCE is not set
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@ -2354,7 +2354,7 @@ CONFIG_JUMP_LABEL=y
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CONFIG_KALLSYMS_ALL=y
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CONFIG_KALLSYMS=y
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CONFIG_KARMA_PARTITION=y
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# CONFIG_KASAN is not set
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CONFIG_KASAN=y
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# CONFIG_KCOV is not set
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CONFIG_KDB_CONTINUE_CATASTROPHIC=0
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# CONFIG_KERNEL_BZIP2 is not set
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11
kernel.spec
11
kernel.spec
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@ -214,7 +214,7 @@ Summary: The Linux kernel
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# pkg_release is what we'll fill in for the rpm Release: field
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%if 0%{?released_kernel}
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%define pkg_release %{fedora_build}%{?buildid}.3.riscv64%{?dist}
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%define pkg_release %{fedora_build}%{?buildid}.4.riscv64%{?dist}
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%else
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@ -229,7 +229,7 @@ Summary: The Linux kernel
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%else
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%define gittag .git0
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%endif
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%define pkg_release 0%{?rctag}%{?gittag}.%{fedora_build}%{?buildid}.3.riscv64%{?dist}
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%define pkg_release 0%{?rctag}%{?gittag}.%{fedora_build}%{?buildid}.4.riscv64%{?dist}
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%endif
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@ -728,12 +728,15 @@ Patch505: ARM-fix-__get_user_check-in-case-uaccess_-calls-are-not-inlined.patch
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# RISC-V SECCOMP support v2 (posted on linux-riscv)
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# http://lists.infradead.org/pipermail/linux-riscv/2019-August/006235.html
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Patch550: 0001-riscv-add-support-for-SECCOMP.patch
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#Patch550: 0001-riscv-add-support-for-SECCOMP.patch
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# RISC-V SiFive Unleashed CPUFreq support
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# WIP, private dev branch
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# https://github.com/sifive/riscv-linux/commits/dev/paulw/cpufreq-dt-aloe-v5.3-rc4
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Patch552: 0002-SiFive-Unleashed-CPUFreq.patch
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#Patch552: 0002-SiFive-Unleashed-CPUFreq.patch
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# KSAN (v4): https://patchwork.kernel.org/cover/11214469/
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Patch553: ksan-riscv.patch
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# END OF PATCH DEFINITIONS
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To: <aryabinin@virtuozzo.com>, <glider@google.com>, <dvyukov@google.com>,
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<corbet@lwn.net>, <paul.walmsley@sifive.com>, <palmer@sifive.com>,
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<linux-mm@kvack.org>, <green.hu@gmail.com>
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Subject: [PATCH v4 1/3] kasan: No KASAN's memmove check if archs don't have
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it.
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Date: Mon, 28 Oct 2019 10:40:59 +0800
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If archs don't have memmove then the C implementation from lib/string.c is used,
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and then it's instrumented by compiler. So there is no need to add KASAN's
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memmove to manual checks.
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Signed-off-by: Nick Hu <nickhu@andestech.com>
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Acked-by: Dmitry Vyukov <dvyukov@google.com>
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Acked-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
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---
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mm/kasan/common.c | 2 ++
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1 file changed, 2 insertions(+)
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diff --git a/mm/kasan/common.c b/mm/kasan/common.c
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index 6814d6d6a023..897f9520bab3 100644
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--- a/mm/kasan/common.c
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+++ b/mm/kasan/common.c
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@@ -107,6 +107,7 @@ void *memset(void *addr, int c, size_t len)
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return __memset(addr, c, len);
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}
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+#ifdef __HAVE_ARCH_MEMMOVE
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#undef memmove
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void *memmove(void *dest, const void *src, size_t len)
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{
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@@ -115,6 +116,7 @@ void *memmove(void *dest, const void *src, size_t len)
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return __memmove(dest, src, len);
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}
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+#endif
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#undef memcpy
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void *memcpy(void *dest, const void *src, size_t len)
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Subject: [PATCH v4 2/3] riscv: Add KASAN support
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Date: Mon, 28 Oct 2019 10:41:00 +0800
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---- ----------------------
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|
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Cc: Nick Hu <nickhu@andestech.com>
|
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Sender: "linux-riscv" <linux-riscv-bounces@lists.infradead.org>
|
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Errors-To:
|
||||
linux-riscv-bounces+patchwork-linux-riscv=patchwork.kernel.org@lists.infradead.org
|
||||
|
||||
This patch ports the feature Kernel Address SANitizer (KASAN).
|
||||
|
||||
Note: The start address of shadow memory is at the beginning of kernel
|
||||
space, which is 2^64 - (2^39 / 2) in SV39. The size of the kernel space is
|
||||
2^38 bytes so the size of shadow memory should be 2^38 / 8. Thus, the
|
||||
shadow memory would not overlap with the fixmap area.
|
||||
|
||||
There are currently two limitations in this port,
|
||||
|
||||
1. RV64 only: KASAN need large address space for extra shadow memory
|
||||
region.
|
||||
|
||||
2. KASAN can't debug the modules since the modules are allocated in VMALLOC
|
||||
area. We mapped the shadow memory, which corresponding to VMALLOC area, to
|
||||
the kasan_early_shadow_page because we don't have enough physical space for
|
||||
all the shadow memory corresponding to VMALLOC area.
|
||||
|
||||
Signed-off-by: Nick Hu <nickhu@andestech.com>
|
||||
Reported-by: Greentime Hu <green.hu@gmail.com>
|
||||
---
|
||||
arch/riscv/Kconfig | 1 +
|
||||
arch/riscv/include/asm/kasan.h | 27 ++++++++
|
||||
arch/riscv/include/asm/pgtable-64.h | 5 ++
|
||||
arch/riscv/include/asm/string.h | 9 +++
|
||||
arch/riscv/kernel/head.S | 3 +
|
||||
arch/riscv/kernel/riscv_ksyms.c | 2 +
|
||||
arch/riscv/kernel/setup.c | 5 ++
|
||||
arch/riscv/kernel/vmlinux.lds.S | 1 +
|
||||
arch/riscv/lib/memcpy.S | 5 +-
|
||||
arch/riscv/lib/memset.S | 5 +-
|
||||
arch/riscv/mm/Makefile | 6 ++
|
||||
arch/riscv/mm/kasan_init.c | 104 ++++++++++++++++++++++++++++
|
||||
12 files changed, 169 insertions(+), 4 deletions(-)
|
||||
create mode 100644 arch/riscv/include/asm/kasan.h
|
||||
create mode 100644 arch/riscv/mm/kasan_init.c
|
||||
|
||||
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
|
||||
index 8eebbc8860bb..ca2fc8ba8550 100644
|
||||
--- a/arch/riscv/Kconfig
|
||||
+++ b/arch/riscv/Kconfig
|
||||
@@ -61,6 +61,7 @@ config RISCV
|
||||
select SPARSEMEM_STATIC if 32BIT
|
||||
select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT if MMU
|
||||
select HAVE_ARCH_MMAP_RND_BITS
|
||||
+ select HAVE_ARCH_KASAN if MMU && 64BIT
|
||||
|
||||
config ARCH_MMAP_RND_BITS_MIN
|
||||
default 18 if 64BIT
|
||||
diff --git a/arch/riscv/include/asm/kasan.h b/arch/riscv/include/asm/kasan.h
|
||||
new file mode 100644
|
||||
index 000000000000..eee6e6588b12
|
||||
--- /dev/null
|
||||
+++ b/arch/riscv/include/asm/kasan.h
|
||||
@@ -0,0 +1,27 @@
|
||||
+/* SPDX-License-Identifier: GPL-2.0 */
|
||||
+/* Copyright (C) 2019 Andes Technology Corporation */
|
||||
+
|
||||
+#ifndef __ASM_KASAN_H
|
||||
+#define __ASM_KASAN_H
|
||||
+
|
||||
+#ifndef __ASSEMBLY__
|
||||
+
|
||||
+#ifdef CONFIG_KASAN
|
||||
+
|
||||
+#include <asm/pgtable.h>
|
||||
+
|
||||
+#define KASAN_SHADOW_SCALE_SHIFT 3
|
||||
+
|
||||
+#define KASAN_SHADOW_SIZE (UL(1) << (38 - KASAN_SHADOW_SCALE_SHIFT))
|
||||
+#define KASAN_SHADOW_START 0xffffffc000000000 /* 2^64 - 2^38 */
|
||||
+#define KASAN_SHADOW_END (KASAN_SHADOW_START + KASAN_SHADOW_SIZE)
|
||||
+
|
||||
+#define KASAN_SHADOW_OFFSET (KASAN_SHADOW_END - (1ULL << \
|
||||
+ (64 - KASAN_SHADOW_SCALE_SHIFT)))
|
||||
+
|
||||
+void kasan_init(void);
|
||||
+asmlinkage void kasan_early_init(void);
|
||||
+
|
||||
+#endif
|
||||
+#endif
|
||||
+#endif /* __ASM_KASAN_H */
|
||||
diff --git a/arch/riscv/include/asm/pgtable-64.h b/arch/riscv/include/asm/pgtable-64.h
|
||||
index 7df8daa66cc8..777a1dddb3df 100644
|
||||
--- a/arch/riscv/include/asm/pgtable-64.h
|
||||
+++ b/arch/riscv/include/asm/pgtable-64.h
|
||||
@@ -59,6 +59,11 @@ static inline unsigned long pud_page_vaddr(pud_t pud)
|
||||
return (unsigned long)pfn_to_virt(pud_val(pud) >> _PAGE_PFN_SHIFT);
|
||||
}
|
||||
|
||||
+static inline struct page *pud_page(pud_t pud)
|
||||
+{
|
||||
+ return pfn_to_page(pud_val(pud) >> _PAGE_PFN_SHIFT);
|
||||
+}
|
||||
+
|
||||
#define pmd_index(addr) (((addr) >> PMD_SHIFT) & (PTRS_PER_PMD - 1))
|
||||
|
||||
static inline pmd_t *pmd_offset(pud_t *pud, unsigned long addr)
|
||||
diff --git a/arch/riscv/include/asm/string.h b/arch/riscv/include/asm/string.h
|
||||
index 1b5d44585962..924af13f8555 100644
|
||||
--- a/arch/riscv/include/asm/string.h
|
||||
+++ b/arch/riscv/include/asm/string.h
|
||||
@@ -11,8 +11,17 @@
|
||||
|
||||
#define __HAVE_ARCH_MEMSET
|
||||
extern asmlinkage void *memset(void *, int, size_t);
|
||||
+extern asmlinkage void *__memset(void *, int, size_t);
|
||||
|
||||
#define __HAVE_ARCH_MEMCPY
|
||||
extern asmlinkage void *memcpy(void *, const void *, size_t);
|
||||
+extern asmlinkage void *__memcpy(void *, const void *, size_t);
|
||||
|
||||
+/* For those files which don't want to check by kasan. */
|
||||
+#if defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__)
|
||||
+
|
||||
+#define memcpy(dst, src, len) __memcpy(dst, src, len)
|
||||
+#define memset(s, c, n) __memset(s, c, n)
|
||||
+
|
||||
+#endif
|
||||
#endif /* _ASM_RISCV_STRING_H */
|
||||
diff --git a/arch/riscv/kernel/head.S b/arch/riscv/kernel/head.S
|
||||
index 72f89b7590dd..95eca23cd811 100644
|
||||
--- a/arch/riscv/kernel/head.S
|
||||
+++ b/arch/riscv/kernel/head.S
|
||||
@@ -102,6 +102,9 @@ clear_bss_done:
|
||||
sw zero, TASK_TI_CPU(tp)
|
||||
la sp, init_thread_union + THREAD_SIZE
|
||||
|
||||
+#ifdef CONFIG_KASAN
|
||||
+ call kasan_early_init
|
||||
+#endif
|
||||
/* Start the kernel */
|
||||
call parse_dtb
|
||||
tail start_kernel
|
||||
diff --git a/arch/riscv/kernel/riscv_ksyms.c b/arch/riscv/kernel/riscv_ksyms.c
|
||||
index 4800cf703186..376bba7f65ce 100644
|
||||
--- a/arch/riscv/kernel/riscv_ksyms.c
|
||||
+++ b/arch/riscv/kernel/riscv_ksyms.c
|
||||
@@ -14,3 +14,5 @@ EXPORT_SYMBOL(__asm_copy_to_user);
|
||||
EXPORT_SYMBOL(__asm_copy_from_user);
|
||||
EXPORT_SYMBOL(memset);
|
||||
EXPORT_SYMBOL(memcpy);
|
||||
+EXPORT_SYMBOL(__memset);
|
||||
+EXPORT_SYMBOL(__memcpy);
|
||||
diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c
|
||||
index a990a6cb184f..41f7eae9bc4d 100644
|
||||
--- a/arch/riscv/kernel/setup.c
|
||||
+++ b/arch/riscv/kernel/setup.c
|
||||
@@ -23,6 +23,7 @@
|
||||
#include <asm/smp.h>
|
||||
#include <asm/tlbflush.h>
|
||||
#include <asm/thread_info.h>
|
||||
+#include <asm/kasan.h>
|
||||
|
||||
#ifdef CONFIG_DUMMY_CONSOLE
|
||||
struct screen_info screen_info = {
|
||||
@@ -70,6 +71,10 @@ void __init setup_arch(char **cmdline_p)
|
||||
swiotlb_init(1);
|
||||
#endif
|
||||
|
||||
+#ifdef CONFIG_KASAN
|
||||
+ kasan_init();
|
||||
+#endif
|
||||
+
|
||||
#ifdef CONFIG_SMP
|
||||
setup_smp();
|
||||
#endif
|
||||
diff --git a/arch/riscv/kernel/vmlinux.lds.S b/arch/riscv/kernel/vmlinux.lds.S
|
||||
index 23cd1a9e52a1..97009803ba9f 100644
|
||||
--- a/arch/riscv/kernel/vmlinux.lds.S
|
||||
+++ b/arch/riscv/kernel/vmlinux.lds.S
|
||||
@@ -46,6 +46,7 @@ SECTIONS
|
||||
KPROBES_TEXT
|
||||
ENTRY_TEXT
|
||||
IRQENTRY_TEXT
|
||||
+ SOFTIRQENTRY_TEXT
|
||||
*(.fixup)
|
||||
_etext = .;
|
||||
}
|
||||
diff --git a/arch/riscv/lib/memcpy.S b/arch/riscv/lib/memcpy.S
|
||||
index b4c477846e91..51ab716253fa 100644
|
||||
--- a/arch/riscv/lib/memcpy.S
|
||||
+++ b/arch/riscv/lib/memcpy.S
|
||||
@@ -7,7 +7,8 @@
|
||||
#include <asm/asm.h>
|
||||
|
||||
/* void *memcpy(void *, const void *, size_t) */
|
||||
-ENTRY(memcpy)
|
||||
+ENTRY(__memcpy)
|
||||
+WEAK(memcpy)
|
||||
move t6, a0 /* Preserve return value */
|
||||
|
||||
/* Defer to byte-oriented copy for small sizes */
|
||||
@@ -104,4 +105,4 @@ ENTRY(memcpy)
|
||||
bltu a1, a3, 5b
|
||||
6:
|
||||
ret
|
||||
-END(memcpy)
|
||||
+END(__memcpy)
|
||||
diff --git a/arch/riscv/lib/memset.S b/arch/riscv/lib/memset.S
|
||||
index 5a7386b47175..34c5360c6705 100644
|
||||
--- a/arch/riscv/lib/memset.S
|
||||
+++ b/arch/riscv/lib/memset.S
|
||||
@@ -8,7 +8,8 @@
|
||||
#include <asm/asm.h>
|
||||
|
||||
/* void *memset(void *, int, size_t) */
|
||||
-ENTRY(memset)
|
||||
+ENTRY(__memset)
|
||||
+WEAK(memset)
|
||||
move t0, a0 /* Preserve return value */
|
||||
|
||||
/* Defer to byte-oriented fill for small sizes */
|
||||
@@ -109,4 +110,4 @@ ENTRY(memset)
|
||||
bltu t0, a3, 5b
|
||||
6:
|
||||
ret
|
||||
-END(memset)
|
||||
+END(__memset)
|
||||
diff --git a/arch/riscv/mm/Makefile b/arch/riscv/mm/Makefile
|
||||
index 9d9a17335686..b8a8ca71f86e 100644
|
||||
--- a/arch/riscv/mm/Makefile
|
||||
+++ b/arch/riscv/mm/Makefile
|
||||
@@ -17,3 +17,9 @@ ifeq ($(CONFIG_MMU),y)
|
||||
obj-$(CONFIG_SMP) += tlbflush.o
|
||||
endif
|
||||
obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
|
||||
+obj-$(CONFIG_KASAN) += kasan_init.o
|
||||
+
|
||||
+ifdef CONFIG_KASAN
|
||||
+KASAN_SANITIZE_kasan_init.o := n
|
||||
+KASAN_SANITIZE_init.o := n
|
||||
+endif
|
||||
diff --git a/arch/riscv/mm/kasan_init.c b/arch/riscv/mm/kasan_init.c
|
||||
new file mode 100644
|
||||
index 000000000000..f0cc86040587
|
||||
--- /dev/null
|
||||
+++ b/arch/riscv/mm/kasan_init.c
|
||||
@@ -0,0 +1,104 @@
|
||||
+// SPDX-License-Identifier: GPL-2.0
|
||||
+// Copyright (C) 2019 Andes Technology Corporation
|
||||
+
|
||||
+#include <linux/pfn.h>
|
||||
+#include <linux/init_task.h>
|
||||
+#include <linux/kasan.h>
|
||||
+#include <linux/kernel.h>
|
||||
+#include <linux/memblock.h>
|
||||
+#include <asm/tlbflush.h>
|
||||
+#include <asm/pgtable.h>
|
||||
+#include <asm/fixmap.h>
|
||||
+
|
||||
+extern pgd_t early_pg_dir[PTRS_PER_PGD];
|
||||
+asmlinkage void __init kasan_early_init(void)
|
||||
+{
|
||||
+ uintptr_t i;
|
||||
+ pgd_t *pgd = early_pg_dir + pgd_index(KASAN_SHADOW_START);
|
||||
+
|
||||
+ for (i = 0; i < PTRS_PER_PTE; ++i)
|
||||
+ set_pte(kasan_early_shadow_pte + i,
|
||||
+ mk_pte(virt_to_page(kasan_early_shadow_page),
|
||||
+ PAGE_KERNEL));
|
||||
+
|
||||
+ for (i = 0; i < PTRS_PER_PMD; ++i)
|
||||
+ set_pmd(kasan_early_shadow_pmd + i,
|
||||
+ pfn_pmd(PFN_DOWN(__pa((uintptr_t)kasan_early_shadow_pte)),
|
||||
+ __pgprot(_PAGE_TABLE)));
|
||||
+
|
||||
+ for (i = KASAN_SHADOW_START; i < KASAN_SHADOW_END;
|
||||
+ i += PGDIR_SIZE, ++pgd)
|
||||
+ set_pgd(pgd,
|
||||
+ pfn_pgd(PFN_DOWN(__pa(((uintptr_t)kasan_early_shadow_pmd))),
|
||||
+ __pgprot(_PAGE_TABLE)));
|
||||
+
|
||||
+ /* init for swapper_pg_dir */
|
||||
+ pgd = pgd_offset_k(KASAN_SHADOW_START);
|
||||
+
|
||||
+ for (i = KASAN_SHADOW_START; i < KASAN_SHADOW_END;
|
||||
+ i += PGDIR_SIZE, ++pgd)
|
||||
+ set_pgd(pgd,
|
||||
+ pfn_pgd(PFN_DOWN(__pa(((uintptr_t)kasan_early_shadow_pmd))),
|
||||
+ __pgprot(_PAGE_TABLE)));
|
||||
+
|
||||
+ flush_tlb_all();
|
||||
+}
|
||||
+
|
||||
+static void __init populate(void *start, void *end)
|
||||
+{
|
||||
+ unsigned long i;
|
||||
+ unsigned long vaddr = (unsigned long)start & PAGE_MASK;
|
||||
+ unsigned long vend = PAGE_ALIGN((unsigned long)end);
|
||||
+ unsigned long n_pages = (vend - vaddr) / PAGE_SIZE;
|
||||
+ unsigned long n_pmds =
|
||||
+ (n_pages % PTRS_PER_PTE) ? n_pages / PTRS_PER_PTE + 1 :
|
||||
+ n_pages / PTRS_PER_PTE;
|
||||
+ pgd_t *pgd = pgd_offset_k(vaddr);
|
||||
+ pmd_t *pmd = memblock_alloc(n_pmds * sizeof(pmd_t), PAGE_SIZE);
|
||||
+ pte_t *pte = memblock_alloc(n_pages * sizeof(pte_t), PAGE_SIZE);
|
||||
+
|
||||
+ for (i = 0; i < n_pages; i++) {
|
||||
+ phys_addr_t phys = memblock_phys_alloc(PAGE_SIZE, PAGE_SIZE);
|
||||
+
|
||||
+ set_pte(pte + i, pfn_pte(PHYS_PFN(phys), PAGE_KERNEL));
|
||||
+ }
|
||||
+
|
||||
+ for (i = 0; i < n_pmds; ++pgd, i += PTRS_PER_PMD)
|
||||
+ set_pgd(pgd, pfn_pgd(PFN_DOWN(__pa(((uintptr_t)(pmd + i)))),
|
||||
+ __pgprot(_PAGE_TABLE)));
|
||||
+
|
||||
+ for (i = 0; i < n_pages; ++pmd, i += PTRS_PER_PTE)
|
||||
+ set_pmd(pmd, pfn_pmd(PFN_DOWN(__pa((uintptr_t)(pte + i))),
|
||||
+ __pgprot(_PAGE_TABLE)));
|
||||
+
|
||||
+ flush_tlb_all();
|
||||
+ memset(start, 0, end - start);
|
||||
+}
|
||||
+
|
||||
+void __init kasan_init(void)
|
||||
+{
|
||||
+ struct memblock_region *reg;
|
||||
+ unsigned long i;
|
||||
+
|
||||
+ kasan_populate_early_shadow((void *)KASAN_SHADOW_START,
|
||||
+ (void *)kasan_mem_to_shadow((void *)VMALLOC_END));
|
||||
+
|
||||
+ for_each_memblock(memory, reg) {
|
||||
+ void *start = (void *)__va(reg->base);
|
||||
+ void *end = (void *)__va(reg->base + reg->size);
|
||||
+
|
||||
+ if (start >= end)
|
||||
+ break;
|
||||
+
|
||||
+ populate(kasan_mem_to_shadow(start),
|
||||
+ kasan_mem_to_shadow(end));
|
||||
+ };
|
||||
+
|
||||
+ for (i = 0; i < PTRS_PER_PTE; i++)
|
||||
+ set_pte(&kasan_early_shadow_pte[i],
|
||||
+ mk_pte(virt_to_page(kasan_early_shadow_page),
|
||||
+ __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_ACCESSED)));
|
||||
+
|
||||
+ memset(kasan_early_shadow_page, 0, PAGE_SIZE);
|
||||
+ init_task.kasan_depth = 0;
|
||||
+}
|
||||
|
||||
From patchwork Mon Oct 28 02:41:01 2019
|
||||
Content-Type: text/plain; charset="utf-8"
|
||||
MIME-Version: 1.0
|
||||
Content-Transfer-Encoding: 7bit
|
||||
X-Patchwork-Submitter: Nick Hu <nickhu@andestech.com>
|
||||
X-Patchwork-Id: 11214473
|
||||
Return-Path:
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To: <aryabinin@virtuozzo.com>, <glider@google.com>, <dvyukov@google.com>,
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Subject: [PATCH v4 3/3] kasan: Add riscv to KASAN documentation.
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Date: Mon, 28 Oct 2019 10:41:01 +0800
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Add riscv to the KASAN documentation to mention that riscv
|
||||
is supporting generic kasan now.
|
||||
|
||||
Signed-off-by: Nick Hu <nickhu@andestech.com>
|
||||
---
|
||||
Documentation/dev-tools/kasan.rst | 4 ++--
|
||||
1 file changed, 2 insertions(+), 2 deletions(-)
|
||||
|
||||
diff --git a/Documentation/dev-tools/kasan.rst b/Documentation/dev-tools/kasan.rst
|
||||
index b72d07d70239..34fbb7212cbc 100644
|
||||
--- a/Documentation/dev-tools/kasan.rst
|
||||
+++ b/Documentation/dev-tools/kasan.rst
|
||||
@@ -21,8 +21,8 @@ global variables yet.
|
||||
|
||||
Tag-based KASAN is only supported in Clang and requires version 7.0.0 or later.
|
||||
|
||||
-Currently generic KASAN is supported for the x86_64, arm64, xtensa and s390
|
||||
-architectures, and tag-based KASAN is supported only for arm64.
|
||||
+Currently generic KASAN is supported for the x86_64, arm64, xtensa, s390 and
|
||||
+riscv architectures, and tag-based KASAN is supported only for arm64.
|
||||
|
||||
Usage
|
||||
-----
|
Loading…
Reference in New Issue