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torvaldstorvalds
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Merge tag 'loongarch-6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
Pull LoongArch updates from Huacai Chen: - Add objtool support for LoongArch - Add ORC stack unwinder support for LoongArch - Add kernel livepatching support for LoongArch - Select ARCH_HAS_CURRENT_STACK_POINTER in Kconfig - Select HAVE_ARCH_USERFAULTFD_MINOR in Kconfig - Some bug fixes and other small changes * tag 'loongarch-6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson: LoongArch/crypto: Clean up useless assignment operations LoongArch: Define the __io_aw() hook as mmiowb() LoongArch: Remove superfluous flush_dcache_page() definition LoongArch: Move {dmw,tlb}_virt_to_page() definition to page.h LoongArch: Change __my_cpu_offset definition to avoid mis-optimization LoongArch: Select HAVE_ARCH_USERFAULTFD_MINOR in Kconfig LoongArch: Select ARCH_HAS_CURRENT_STACK_POINTER in Kconfig LoongArch: Add kernel livepatching support LoongArch: Add ORC stack unwinder support objtool: Check local label in read_unwind_hints() objtool: Check local label in add_dead_ends() objtool/LoongArch: Enable orc to be built objtool/x86: Separate arch-specific and generic parts objtool/LoongArch: Implement instruction decoder objtool/LoongArch: Enable objtool to be built
2 parents 4f55aa8 + fea1c94 commit 1e3cd03

63 files changed

Lines changed: 2040 additions & 266 deletions

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‎arch/loongarch/Kconfig‎

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@@ -15,6 +15,7 @@ config LOONGARCH
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select ARCH_ENABLE_THP_MIGRATION if TRANSPARENT_HUGEPAGE
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select ARCH_HAS_ACPI_TABLE_UPGRADE if ACPI
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select ARCH_HAS_CPU_FINALIZE_INIT
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select ARCH_HAS_CURRENT_STACK_POINTER
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select ARCH_HAS_FORTIFY_SOURCE
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select ARCH_HAS_KCOV
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select ARCH_HAS_NMI_SAFE_THIS_CPU_OPS
@@ -104,6 +105,7 @@ config LOONGARCH
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select HAVE_ARCH_SECCOMP_FILTER
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select HAVE_ARCH_TRACEHOOK
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select HAVE_ARCH_TRANSPARENT_HUGEPAGE
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select HAVE_ARCH_USERFAULTFD_MINOR if USERFAULTFD
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select HAVE_ASM_MODVERSIONS
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select HAVE_CONTEXT_TRACKING_USER
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select HAVE_C_RECORDMCOUNT
@@ -133,20 +135,24 @@ config LOONGARCH
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select HAVE_KPROBES
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select HAVE_KPROBES_ON_FTRACE
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select HAVE_KRETPROBES
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select HAVE_LIVEPATCH
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select HAVE_MOD_ARCH_SPECIFIC
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select HAVE_NMI
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select HAVE_OBJTOOL if AS_HAS_EXPLICIT_RELOCS
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select HAVE_PCI
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select HAVE_PERF_EVENTS
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select HAVE_PERF_REGS
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select HAVE_PERF_USER_STACK_DUMP
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select HAVE_PREEMPT_DYNAMIC_KEY
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select HAVE_REGS_AND_STACK_ACCESS_API
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select HAVE_RELIABLE_STACKTRACE if UNWINDER_ORC
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select HAVE_RETHOOK
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select HAVE_RSEQ
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select HAVE_RUST
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select HAVE_SAMPLE_FTRACE_DIRECT
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select HAVE_SAMPLE_FTRACE_DIRECT_MULTI
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select HAVE_SETUP_PER_CPU_AREA if NUMA
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select HAVE_STACK_VALIDATION if HAVE_OBJTOOL
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select HAVE_STACKPROTECTOR
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select HAVE_SYSCALL_TRACEPOINTS
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select HAVE_TIF_NOHZ
@@ -624,6 +630,8 @@ config RANDOMIZE_BASE_MAX_OFFSET
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This is limited by the size of the lower address memory, 256MB.
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source "kernel/livepatch/Kconfig"
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endmenu
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config ARCH_SELECT_MEMORY_MODEL

‎arch/loongarch/Kconfig.debug‎

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@@ -26,4 +26,15 @@ config UNWINDER_PROLOGUE
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Some of the addresses it reports may be incorrect (but better than the
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Guess unwinder).
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config UNWINDER_ORC
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bool "ORC unwinder"
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select OBJTOOL
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help
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This option enables the ORC (Oops Rewind Capability) unwinder for
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unwinding kernel stack traces. It uses a custom data format which is
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a simplified version of the DWARF Call Frame Information standard.
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Enabling this option will increase the kernel's runtime memory usage
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by roughly 2-4MB, depending on your kernel config.
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endchoice

‎arch/loongarch/Makefile‎

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@@ -26,6 +26,18 @@ endif
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32bit-emul = elf32loongarch
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64bit-emul = elf64loongarch
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ifdef CONFIG_UNWINDER_ORC
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orc_hash_h := arch/$(SRCARCH)/include/generated/asm/orc_hash.h
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orc_hash_sh := $(srctree)/scripts/orc_hash.sh
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targets += $(orc_hash_h)
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quiet_cmd_orc_hash = GEN $@
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cmd_orc_hash = mkdir -p $(dir $@); \
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$(CONFIG_SHELL) $(orc_hash_sh) < $< > $@
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$(orc_hash_h): $(srctree)/arch/loongarch/include/asm/orc_types.h $(orc_hash_sh) FORCE
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$(call if_changed,orc_hash)
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archprepare: $(orc_hash_h)
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endif
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ifdef CONFIG_DYNAMIC_FTRACE
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KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY
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CC_FLAGS_FTRACE := -fpatchable-function-entry=2
@@ -72,8 +84,6 @@ KBUILD_CFLAGS_KERNEL += $(call cc-option,-mdirect-extern-access)
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KBUILD_CFLAGS_KERNEL += $(call cc-option,-fdirect-access-external-data)
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KBUILD_AFLAGS_MODULE += $(call cc-option,-fno-direct-access-external-data)
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KBUILD_CFLAGS_MODULE += $(call cc-option,-fno-direct-access-external-data)
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KBUILD_AFLAGS_MODULE += $(call cc-option,-mno-relax) $(call cc-option,-Wa$(comma)-mno-relax)
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KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-relax) $(call cc-option,-Wa$(comma)-mno-relax)
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else
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cflags-y += $(call cc-option,-mno-explicit-relocs)
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KBUILD_AFLAGS_KERNEL += -Wa,-mla-global-with-pcrel
@@ -82,6 +92,15 @@ KBUILD_AFLAGS_MODULE += -Wa,-mla-global-with-abs
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KBUILD_CFLAGS_MODULE += -fplt -Wa,-mla-global-with-abs,-mla-local-with-abs
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endif
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KBUILD_AFLAGS += $(call cc-option,-mno-relax) $(call cc-option,-Wa$(comma)-mno-relax)
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KBUILD_CFLAGS += $(call cc-option,-mno-relax) $(call cc-option,-Wa$(comma)-mno-relax)
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KBUILD_AFLAGS += $(call cc-option,-mthin-add-sub) $(call cc-option,-Wa$(comma)-mthin-add-sub)
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KBUILD_CFLAGS += $(call cc-option,-mthin-add-sub) $(call cc-option,-Wa$(comma)-mthin-add-sub)
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ifdef CONFIG_OBJTOOL
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KBUILD_CFLAGS += -fno-jump-tables
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endif
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KBUILD_RUSTFLAGS += --target=$(objtree)/scripts/target.json
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KBUILD_RUSTFLAGS_MODULE += -Crelocation-model=pic
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‎arch/loongarch/crypto/crc32-loongarch.c‎

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@@ -44,7 +44,6 @@ static u32 crc32_loongarch_hw(u32 crc_, const u8 *p, unsigned int len)
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CRC32(crc, value, w);
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p += sizeof(u32);
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len -= sizeof(u32);
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}
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if (len & sizeof(u16)) {
@@ -80,7 +79,6 @@ static u32 crc32c_loongarch_hw(u32 crc_, const u8 *p, unsigned int len)
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CRC32C(crc, value, w);
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p += sizeof(u32);
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len -= sizeof(u32);
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}
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if (len & sizeof(u16)) {

‎arch/loongarch/include/asm/Kbuild‎

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@@ -1,9 +1,12 @@
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# SPDX-License-Identifier: GPL-2.0
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generated-y += orc_hash.h
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generic-y += dma-contiguous.h
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generic-y += mcs_spinlock.h
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generic-y += parport.h
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generic-y += early_ioremap.h
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generic-y += qrwlock.h
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generic-y += qspinlock.h
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generic-y += rwsem.h
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generic-y += segment.h
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generic-y += user.h

‎arch/loongarch/include/asm/bug.h‎

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@@ -44,6 +44,7 @@
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do { \
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instrumentation_begin(); \
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__BUG_FLAGS(BUGFLAG_WARNING|(flags)); \
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annotate_reachable(); \
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instrumentation_end(); \
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} while (0)
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‎arch/loongarch/include/asm/cacheflush.h‎

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@@ -37,8 +37,6 @@ void local_flush_icache_range(unsigned long start, unsigned long end);
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#define flush_icache_range local_flush_icache_range
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#define flush_icache_user_range local_flush_icache_range
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#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
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#define flush_cache_all() do { } while (0)
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#define flush_cache_mm(mm) do { } while (0)
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#define flush_cache_dup_mm(mm) do { } while (0)
@@ -47,7 +45,6 @@ void local_flush_icache_range(unsigned long start, unsigned long end);
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#define flush_cache_vmap(start, end) do { } while (0)
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#define flush_cache_vunmap(start, end) do { } while (0)
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#define flush_icache_user_page(vma, page, addr, len) do { } while (0)
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#define flush_dcache_page(page) do { } while (0)
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#define flush_dcache_mmap_lock(mapping) do { } while (0)
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#define flush_dcache_mmap_unlock(mapping) do { } while (0)
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‎arch/loongarch/include/asm/exception.h‎

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@@ -6,6 +6,8 @@
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#include <asm/ptrace.h>
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#include <linux/kprobes.h>
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extern void *exception_table[];
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void show_registers(struct pt_regs *regs);
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asmlinkage void cache_parity_error(void);

‎arch/loongarch/include/asm/io.h‎

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@@ -71,6 +71,8 @@ extern void __memcpy_fromio(void *to, const volatile void __iomem *from, size_t
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#define memcpy_fromio(a, c, l) __memcpy_fromio((a), (c), (l))
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#define memcpy_toio(c, a, l) __memcpy_toio((c), (a), (l))
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74+
#define __io_aw() mmiowb()
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#include <asm-generic/io.h>
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#define ARCH_HAS_VALID_PHYS_ADDR_RANGE

‎arch/loongarch/include/asm/module.h‎

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@@ -6,6 +6,7 @@
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#define _ASM_MODULE_H
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#include <asm/inst.h>
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#include <asm/orc_types.h>
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#include <asm-generic/module.h>
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#define RELA_STACK_DEPTH 16
@@ -21,6 +22,12 @@ struct mod_arch_specific {
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struct mod_section plt;
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struct mod_section plt_idx;
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#ifdef CONFIG_UNWINDER_ORC
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unsigned int num_orcs;
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int *orc_unwind_ip;
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struct orc_entry *orc_unwind;
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#endif
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/* For CONFIG_DYNAMIC_FTRACE */
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struct plt_entry *ftrace_trampolines;
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};

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