On 2022/09/19 13:47, Youling Tang wrote: > Patch adds support for LoongArch64 in makedumpfile. It takes care of > vmalloc, module and directly map kernel memory region's translation. > Currently we only support 3 leverl 16K pages and VA_BITS as 48. > > The changes were tested on a LoongArch64 Loongson-3A5000 processor. > The dump compression and filtering (for all dump levels 1,2,4,8,16 > and 31) tests are succussfull. > > Signed-off-by: Youling Tang <tangyouling@xxxxxxxxxxx> Looks good, applied with adjusting a few indents: https://github.com/makedumpfile/makedumpfile/commit/787a23ebc9d948f036aefb044f94e54facccc5af Thanks, Kazu > --- > Note: kexec/kdump support patch see link [1]: > [1] Link: https://lore.kernel.org/loongarch/1663210426-15446-1-git-send-email-tangyouling@xxxxxxxxxxx/T/#t > > Makefile | 2 +- > arch/loongarch64.c | 113 +++++++++++++++++++++++++++++++++++++++++++++ > makedumpfile.h | 58 +++++++++++++++++++++++ > 3 files changed, 172 insertions(+), 1 deletion(-) > create mode 100644 arch/loongarch64.c > > diff --git a/Makefile b/Makefile > index 370a97c..e07f466 100644 > --- a/Makefile > +++ b/Makefile > @@ -47,7 +47,7 @@ endif > SRC_BASE = makedumpfile.c makedumpfile.h diskdump_mod.h sadump_mod.h sadump_info.h > SRC_PART = print_info.c dwarf_info.c elf_info.c erase_info.c sadump_info.c cache.c tools.c printk.c detect_cycle.c > OBJ_PART=$(patsubst %.c,%.o,$(SRC_PART)) > -SRC_ARCH = arch/arm.c arch/arm64.c arch/x86.c arch/x86_64.c arch/ia64.c arch/ppc64.c arch/s390x.c arch/ppc.c arch/sparc64.c arch/mips64.c > +SRC_ARCH = arch/arm.c arch/arm64.c arch/x86.c arch/x86_64.c arch/ia64.c arch/ppc64.c arch/s390x.c arch/ppc.c arch/sparc64.c arch/mips64.c arch/loongarch64.c > OBJ_ARCH=$(patsubst %.c,%.o,$(SRC_ARCH)) > > LIBS = -ldw -lbz2 -ldl -lelf -lz > diff --git a/arch/loongarch64.c b/arch/loongarch64.c > new file mode 100644 > index 0000000..42a02ab > --- /dev/null > +++ b/arch/loongarch64.c > @@ -0,0 +1,113 @@ > +/* > + * loongarch64.c > + * > + * Copyright (C) 2022 Loongson Technology Corporation Limited > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License as published by > + * the Free Software Foundation; either version 2 of the License, or > + * (at your option) any later version. > + * > + * This program is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + */ > +#ifdef __loongarch64__ > + > +#include "../print_info.h" > +#include "../elf_info.h" > +#include "../makedumpfile.h" > + > +int > +get_phys_base_loongarch64(void) > +{ > + info->phys_base = 0ULL; > + > + DEBUG_MSG("phys_base : %lx\n", info->phys_base); > + > + return TRUE; > +} > + > +int > +get_machdep_info_loongarch64(void) > +{ > + info->section_size_bits = _SECTION_SIZE_BITS; > + > + /* Check if we can get MAX_PHYSMEM_BITS from vmcoreinfo */ > + if (NUMBER(MAX_PHYSMEM_BITS) != NOT_FOUND_NUMBER) > + info->max_physmem_bits = NUMBER(MAX_PHYSMEM_BITS); > + else > + info->max_physmem_bits = _MAX_PHYSMEM_BITS; > + > + /* Check if we can get SECTION_SIZE_BITS from vmcoreinfo */ > + if (NUMBER(SECTION_SIZE_BITS) != NOT_FOUND_NUMBER) > + info->section_size_bits = NUMBER(SECTION_SIZE_BITS); > + else > + info->section_size_bits = _SECTION_SIZE_BITS; > + > + DEBUG_MSG("max_physmem_bits : %ld\n", info->max_physmem_bits); > + DEBUG_MSG("section_size_bits: %ld\n", info->section_size_bits); > + > + return TRUE; > +} > + > +int > +get_versiondep_info_loongarch64(void) > +{ > + info->page_offset = _PAGE_OFFSET; > + > + DEBUG_MSG("page_offset : %lx\n", info->page_offset); > + > + return TRUE; > +} > + > +unsigned long long > +vaddr_to_paddr_loongarch64(unsigned long vaddr) > +{ > + unsigned long long paddr = NOT_PADDR; > + pgd_t *pgda, pgdv; > + pmd_t *pmda, pmdv; > + pte_t *ptea, ptev; > + > + if (vaddr >= _XKPRANGE && vaddr < _XKVRANGE) > + return vaddr & ((1ULL << MAX_PHYSMEM_BITS()) - 1); > + > + if (SYMBOL(swapper_pg_dir) == NOT_FOUND_SYMBOL) { > + ERRMSG("Can't get the symbol of swapper_pg_dir.\n"); > + return NOT_PADDR; > + } > + > + pgda = pgd_offset(SYMBOL(swapper_pg_dir), vaddr); > + if (!readmem(VADDR, (unsigned long long)pgda, &pgdv, sizeof(pgdv))) { > + ERRMSG("Can't read pgd\n"); > + return NOT_PADDR; > + } > + > + pmda = pmd_offset(&pgdv, vaddr); > + if (!readmem(VADDR, (unsigned long long)pmda, &pmdv, sizeof(pmdv))) { > + ERRMSG("Can't read pmd\n"); > + return NOT_PADDR; > + } > + > + if (pmdv & _PAGE_HUGE) { > + paddr = (pmdv & PMD_MASK) + (vaddr & (PMD_SIZE - 1)); > + return paddr; > + } > + > + ptea = pte_offset(&pmdv, vaddr); > + if (!readmem(VADDR, (unsigned long long)ptea, &ptev, sizeof(ptev))) { > + ERRMSG("Can't read pte\n"); > + return NOT_PADDR; > + } > + > + if (!(ptev & _PAGE_PRESENT)) { > + ERRMSG("Can't get a valid pte.\n"); > + return NOT_PADDR; > + } > + > + paddr = PAGEBASE(ptev) + (vaddr & (PAGESIZE() - 1)); > + return paddr; > +} > + > +#endif /* loongarch64 */ > diff --git a/makedumpfile.h b/makedumpfile.h > index 49b9242..a70b1de 100644 > --- a/makedumpfile.h > +++ b/makedumpfile.h > @@ -1013,6 +1013,42 @@ typedef unsigned long pgd_t; > > #endif /* mips64 */ > > +#ifdef __loongarch64__ > +#define KVBASE (0x8000000000000000ULL) > +#define _PAGE_OFFSET (0x9000000000000000ULL) > +#define _XKPRANGE (0x8000000000000000ULL) > +#define _XKVRANGE (0xc000000000000000ULL) > +#define _SECTION_SIZE_BITS (29) > +#define _MAX_PHYSMEM_BITS (48) > +#define _PAGE_HUGE (1 << 6) /* HUGE is a PMD bit */ > +#define _PAGE_PRESENT (1 << 7) > + > +typedef unsigned long pte_t; > +typedef unsigned long pmd_t; > +typedef unsigned long pgd_t; > + > +#define PAGE_MASK (~(PAGESIZE() - 1)) > +#define PMD_MASK (~(PMD_SIZE - 1)) > +#define PMD_SHIFT ((PAGESHIFT() - 3) * 2 + 3) > +#define PMD_SIZE (1UL << PMD_SHIFT) > +#define PGDIR_SHIFT ((PAGESHIFT() - 3) * 3 + 3) > +#define PTRS_PER_PTE (1 << (PAGESHIFT() - 3)) > +#define PTRS_PER_PMD PTRS_PER_PTE > +#define PTRS_PER_PGD PTRS_PER_PTE > + > +#define pte_index(vaddr) (((vaddr) >> PAGESHIFT()) & (PTRS_PER_PTE - 1)) > +#define pmd_page_paddr(pmd) (pmd & (int32_t)PAGE_MASK) > +#define pte_offset(dir, vaddr) ((pte_t *)pmd_page_paddr((*dir)) + pte_index(vaddr)) > + > +#define pmd_index(vaddr) (((vaddr) >> PMD_SHIFT) & (PTRS_PER_PMD - 1)) > +#define pgd_page_paddr(pgd) (pgd & (int32_t)PAGE_MASK) > +#define pmd_offset(pgd, vaddr) ((pmd_t *)pgd_page_paddr((*pgd)) + pmd_index(vaddr)) > + > +#define pgd_index(vaddr) (((vaddr) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1)) > +#define pgd_offset(pgdir, vaddr) ((pgd_t *)(pgdir) + pgd_index(vaddr)) > + > +#endif /* loongarch64 */ > + > /* > * The function of dependence on machine > */ > @@ -1184,6 +1220,22 @@ unsigned long long vaddr_to_paddr_mips64(unsigned long vaddr); > #define arch_crashkernel_mem_size() stub_false() > #endif /* mips64 */ > > +#ifdef __loongarch64__ /* loongarch64 */ > +int get_phys_base_loongarch64(void); > +int get_machdep_info_loongarch64(void); > +int get_versiondep_info_loongarch64(void); > +unsigned long long vaddr_to_paddr_loongarch64(unsigned long vaddr); > +#define find_vmemmap() stub_false() > +#define get_phys_base() get_phys_base_loongarch64() > +#define get_machdep_info() get_machdep_info_loongarch64() > +#define get_versiondep_info() get_versiondep_info_loongarch64() > +#define get_kaslr_offset(X) stub_false() > +#define vaddr_to_paddr(X) vaddr_to_paddr_loongarch64(X) > +#define paddr_to_vaddr(X) paddr_to_vaddr_general(X) > +#define is_phys_addr(X) stub_true_ul(X) > +#define arch_crashkernel_mem_size() stub_false() > +#endif /* loongarch64 */ > + > typedef unsigned long long mdf_pfn_t; > > #ifndef ARCH_PFN_OFFSET > @@ -2318,6 +2370,12 @@ int get_xen_info_ia64(void); > #define get_xen_info_arch(X) FALSE > #endif /* mips64 */ > > +#ifdef __loongarch64__ /* loongarch64 */ > +#define kvtop_xen(X) FALSE > +#define get_xen_basic_info_arch(X) FALSE > +#define get_xen_info_arch(X) FALSE > +#endif /* loongarch64 */ > + > struct cycle { > mdf_pfn_t start_pfn; > mdf_pfn_t end_pfn; _______________________________________________ kexec mailing list kexec@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/kexec
