| 文件 | 最后提交记录 | 最后更新时间 |
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LoongArch: Add KASAN (Kernel Address Sanitizer) support 1/8 of kernel addresses reserved for shadow memory. But for LoongArch, There are a lot of holes between different segments and valid address space (256T available) is insufficient to map all these segments to kasan shadow memory with the common formula provided by kasan core, saying (addr >> KASAN_SHADOW_SCALE_SHIFT) + KASAN_SHADOW_OFFSET So LoongArch has a arch-specific mapping formula, different segments are mapped individually, and only limited space lengths of these specific segments are mapped to shadow. At early boot stage the whole shadow region populated with just one physical page (kasan_early_shadow_page). Later, this page is reused as readonly zero shadow for some memory that kasan currently don't track. After mapping the physical memory, pages for shadow memory are allocated and mapped. Functions like memset()/memcpy()/memmove() do a lot of memory accesses. If bad pointer passed to one of these function it is important to be caught. Compiler's instrumentation cannot do this since these functions are written in assembly. KASan replaces memory functions with manually instrumented variants. Original functions declared as weak symbols so strong definitions in mm/kasan/kasan.c could replace them. Original functions have aliases with '__' prefix in names, so we could call non-instrumented variant if needed. Signed-off-by: Qing Zhang <zhangqing@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn> | 2 年前 | |
Documentation/features: Use loongarch instead of loong The official arch name is LoongArch [1], we should use small letter loongarch instead of loong in Documentation/features, just use the features-refresh.sh to refresh all the related files. [1] https://www.kernel.org/doc/html/latest/loongarch/index.html Fixes: 5860800e8696 ("Documentation/features: Update the arch support status files") Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Link: https://lore.kernel.org/r/1670156327-9631-3-git-send-email-yangtiezhu@loongson.cn Signed-off-by: Jonathan Corbet <corbet@lwn.net> | 3 年前 | |
Documentation/features: Use loongarch instead of loong The official arch name is LoongArch [1], we should use small letter loongarch instead of loong in Documentation/features, just use the features-refresh.sh to refresh all the related files. [1] https://www.kernel.org/doc/html/latest/loongarch/index.html Fixes: 5860800e8696 ("Documentation/features: Update the arch support status files") Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Link: https://lore.kernel.org/r/1670156327-9631-3-git-send-email-yangtiezhu@loongson.cn Signed-off-by: Jonathan Corbet <corbet@lwn.net> | 3 年前 | |
LoongArch: Allow building with kcov coverage Add ARCH_HAS_KCOV and HAVE_GCC_PLUGINS to the LoongArch Kconfig. And also disable instrumentation of vdso. Signed-off-by: Feiyang Chen <chenfeiyang@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn> | 2 年前 | |
LoongArch: Add basic KGDB & KDB support KGDB is intended to be used as a source level debugger for the Linux kernel. It is used along with gdb to debug a Linux kernel. GDB can be used to "break in" to the kernel to inspect memory, variables and regs similar to the way an application developer would use GDB to debug an application. KDB is a frontend of KGDB which is similar to GDB. By now, in addition to the generic KGDB features, the LoongArch KGDB implements the following features: - Hardware breakpoints/watchpoints; - Software single-step support for KDB. Signed-off-by: Qing Zhang <zhangqing@loongson.cn> # Framework & CoreFeature Signed-off-by: Binbin Zhou <zhoubinbin@loongson.cn> # BreakPoint & SingleStep Signed-off-by: Hui Li <lihui@loongson.cn> # Some Minor Improvements Signed-off-by: Randy Dunlap <rdunlap@infradead.org> # Some Build Error Fixes Signed-off-by: Huacai Chen <chenhuacai@loongson.cn> | 2 年前 | |
LoongArch: Select HAVE_DEBUG_KMEMLEAK to support kmemleak We can see that DEBUG_KMEMLEAK depends on HAVE_DEBUG_KMEMLEAK after commit b69ec42b1b19 ("Kconfig: clean up the long arch list for the DEBUG_KMEMLEAK config option"), just select HAVE_DEBUG_KMEMLEAK to support kmemleak on LoongArch. Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn> | 3 年前 | |
Documentation/features: Refresh support files for 6.5 Run the refresh script [1] to document the recent feature additions. [1] Documentation/features/scripts/features-refresh.sh Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/1689060720-4628-3-git-send-email-yangtiezhu@loongson.cn | 2 年前 | |
Documentation/features: Refresh support files for 6.5 Run the refresh script [1] to document the recent feature additions. [1] Documentation/features/scripts/features-refresh.sh Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/1689060720-4628-3-git-send-email-yangtiezhu@loongson.cn | 2 年前 | |
Documentation/features: Refresh support files for 6.5 Run the refresh script [1] to document the recent feature additions. [1] Documentation/features/scripts/features-refresh.sh Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/1689060720-4628-3-git-send-email-yangtiezhu@loongson.cn | 2 年前 | |
Documentation/features: Use loongarch instead of loong The official arch name is LoongArch [1], we should use small letter loongarch instead of loong in Documentation/features, just use the features-refresh.sh to refresh all the related files. [1] https://www.kernel.org/doc/html/latest/loongarch/index.html Fixes: 5860800e8696 ("Documentation/features: Update the arch support status files") Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Link: https://lore.kernel.org/r/1670156327-9631-3-git-send-email-yangtiezhu@loongson.cn Signed-off-by: Jonathan Corbet <corbet@lwn.net> | 3 年前 | |
Documentation/features: Refresh support files for 6.5 Run the refresh script [1] to document the recent feature additions. [1] Documentation/features/scripts/features-refresh.sh Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/1689060720-4628-3-git-send-email-yangtiezhu@loongson.cn | 2 年前 | |
Documentation/features: Refresh support files for 6.5 Run the refresh script [1] to document the recent feature additions. [1] Documentation/features/scripts/features-refresh.sh Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/1689060720-4628-3-git-send-email-yangtiezhu@loongson.cn | 2 年前 | |
Documentation/features: Use loongarch instead of loong The official arch name is LoongArch [1], we should use small letter loongarch instead of loong in Documentation/features, just use the features-refresh.sh to refresh all the related files. [1] https://www.kernel.org/doc/html/latest/loongarch/index.html Fixes: 5860800e8696 ("Documentation/features: Update the arch support status files") Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Link: https://lore.kernel.org/r/1670156327-9631-3-git-send-email-yangtiezhu@loongson.cn Signed-off-by: Jonathan Corbet <corbet@lwn.net> | 3 年前 |
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