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 <[email protected]> --- Note: kexec/kdump support patch see link [1]: [1] Link: https://lore.kernel.org/loongarch/[email protected]/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; -- 2.36.0 _______________________________________________ kexec mailing list [email protected] http://lists.infradead.org/mailman/listinfo/kexec
