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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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12952b6bbd
1, Allow usage of LSX/LASX in the kernel; 2, Add SIMD-optimized RAID5/RAID6 routines; 3, Add Loongson Binary Translation (LBT) extension support; 4, Add basic KGDB & KDB support; 5, Add building with kcov coverage; 6, Add KFENCE (Kernel Electric-Fence) support; 7, Add KASAN (Kernel Address Sanitizer) support; 8, Some bug fixes and other small changes; 9, Update the default config file. -----BEGIN PGP SIGNATURE----- iQJKBAABCAA0FiEEzOlt8mkP+tbeiYy5AoYrw/LiJnoFAmT5TfMWHGNoZW5odWFj YWlAa2VybmVsLm9yZwAKCRAChivD8uImeqd3EACjqCaHNlp33kwufSPpGuQw9a8I F7JW1KzBOoWELch5nFRjfQClROBWRmM4jN5YnxENBQ5K2F1K6gfxdkfjew+KV2mn ki9ByamCfFVJDZXo9wavUD2LBrVakEFmLT+SyXBxdWwJ3fDivHjF6A0qs9ltp7dq Bttq4bkw1mZsU6MnViRwPKVROtNUVrd9mwYSTq0iXviVEbWhPHQQTxRizNra9Z6X 7XWxO0ODHl0WVvdOJU+F16mBRS3Bs1g/HHAIDc41yrYEHFFOeFCEUAQSF/4Nj5wj BAfAB8WOa9+vPH8fTnrpCt2RtGJmkz71TM49DdXB7jpGaWIyc4WDi9MXeeBiJ0wE vQg8IECc9POC1sH4/6BMwq2qkrWRj2PYFYof0fP66iWNjmodtNUf7GOVHy8MTQan xHWizJFAdY/u/bwbF9tRQ+EVeot/844CkjtZxkgTfV8shN6kCMEVAamwBItZ7TXN g/oc1ORM6nsKHBDQF3r2LSY0Gbf3OSfMJVL8SLEQ9hAhgGhotmJ36B4bdvyO7T0Q gNn//U+p4IIMFRKRxreEz9P0KjTOJrHAAxNzu1oZebhGZd5WI+i0PHYkkBDKZTXc 7qaEdM2cX8Wd0ePIXOHQnSItwYO7ilrviHyeCM8wd/g2/W/00jvnpF3J+2rk7eJO rcfAr8+V5ylYBQzp6Q== =NXy2 -----END PGP SIGNATURE----- Merge tag 'loongarch-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson Pull LoongArch updates from Huacai Chen: - Allow usage of LSX/LASX in the kernel, and use them for SIMD-optimized RAID5/RAID6 routines - Add Loongson Binary Translation (LBT) extension support - Add basic KGDB & KDB support - Add building with kcov coverage - Add KFENCE (Kernel Electric-Fence) support - Add KASAN (Kernel Address Sanitizer) support - Some bug fixes and other small changes - Update the default config file * tag 'loongarch-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson: (25 commits) LoongArch: Update Loongson-3 default config file LoongArch: Add KASAN (Kernel Address Sanitizer) support LoongArch: Simplify the processing of jumping new kernel for KASLR kasan: Add (pmd|pud)_init for LoongArch zero_(pud|p4d)_populate process kasan: Add __HAVE_ARCH_SHADOW_MAP to support arch specific mapping LoongArch: Add KFENCE (Kernel Electric-Fence) support LoongArch: Get partial stack information when providing regs parameter LoongArch: mm: Add page table mapped mode support for virt_to_page() kfence: Defer the assignment of the local variable addr LoongArch: Allow building with kcov coverage LoongArch: Provide kaslr_offset() to get kernel offset LoongArch: Add basic KGDB & KDB support LoongArch: Add Loongson Binary Translation (LBT) extension support raid6: Add LoongArch SIMD recovery implementation raid6: Add LoongArch SIMD syndrome calculation LoongArch: Add SIMD-optimized XOR routines LoongArch: Allow usage of LSX/LASX in the kernel LoongArch: Define symbol 'fault' as a local label in fpu.S LoongArch: Adjust {copy, clear}_user exception handler behavior LoongArch: Use static defined zero page rather than allocated ...
146 lines
2.9 KiB
C
146 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
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*/
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#include <linux/init.h>
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#include <linux/export.h>
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#include <linux/mm.h>
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#include <asm/pgalloc.h>
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#include <asm/pgtable.h>
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#include <asm/tlbflush.h>
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struct page *dmw_virt_to_page(unsigned long kaddr)
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{
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return pfn_to_page(virt_to_pfn(kaddr));
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}
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EXPORT_SYMBOL_GPL(dmw_virt_to_page);
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struct page *tlb_virt_to_page(unsigned long kaddr)
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{
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return pfn_to_page(pte_pfn(*virt_to_kpte(kaddr)));
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}
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EXPORT_SYMBOL_GPL(tlb_virt_to_page);
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pgd_t *pgd_alloc(struct mm_struct *mm)
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{
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pgd_t *init, *ret = NULL;
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struct ptdesc *ptdesc = pagetable_alloc(GFP_KERNEL & ~__GFP_HIGHMEM, 0);
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if (ptdesc) {
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ret = (pgd_t *)ptdesc_address(ptdesc);
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init = pgd_offset(&init_mm, 0UL);
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pgd_init(ret);
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memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
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(PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
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}
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return ret;
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}
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EXPORT_SYMBOL_GPL(pgd_alloc);
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void pgd_init(void *addr)
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{
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unsigned long *p, *end;
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unsigned long entry;
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#if !defined(__PAGETABLE_PUD_FOLDED)
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entry = (unsigned long)invalid_pud_table;
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#elif !defined(__PAGETABLE_PMD_FOLDED)
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entry = (unsigned long)invalid_pmd_table;
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#else
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entry = (unsigned long)invalid_pte_table;
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#endif
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p = (unsigned long *)addr;
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end = p + PTRS_PER_PGD;
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do {
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p[0] = entry;
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p[1] = entry;
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p[2] = entry;
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p[3] = entry;
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p[4] = entry;
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p += 8;
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p[-3] = entry;
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p[-2] = entry;
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p[-1] = entry;
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} while (p != end);
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}
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EXPORT_SYMBOL_GPL(pgd_init);
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#ifndef __PAGETABLE_PMD_FOLDED
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void pmd_init(void *addr)
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{
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unsigned long *p, *end;
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unsigned long pagetable = (unsigned long)invalid_pte_table;
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p = (unsigned long *)addr;
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end = p + PTRS_PER_PMD;
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do {
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p[0] = pagetable;
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p[1] = pagetable;
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p[2] = pagetable;
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p[3] = pagetable;
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p[4] = pagetable;
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p += 8;
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p[-3] = pagetable;
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p[-2] = pagetable;
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p[-1] = pagetable;
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} while (p != end);
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}
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EXPORT_SYMBOL_GPL(pmd_init);
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#endif
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#ifndef __PAGETABLE_PUD_FOLDED
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void pud_init(void *addr)
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{
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unsigned long *p, *end;
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unsigned long pagetable = (unsigned long)invalid_pmd_table;
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p = (unsigned long *)addr;
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end = p + PTRS_PER_PUD;
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do {
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p[0] = pagetable;
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p[1] = pagetable;
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p[2] = pagetable;
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p[3] = pagetable;
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p[4] = pagetable;
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p += 8;
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p[-3] = pagetable;
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p[-2] = pagetable;
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p[-1] = pagetable;
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} while (p != end);
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}
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EXPORT_SYMBOL_GPL(pud_init);
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#endif
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pmd_t mk_pmd(struct page *page, pgprot_t prot)
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{
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pmd_t pmd;
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pmd_val(pmd) = (page_to_pfn(page) << PFN_PTE_SHIFT) | pgprot_val(prot);
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return pmd;
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}
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void set_pmd_at(struct mm_struct *mm, unsigned long addr,
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pmd_t *pmdp, pmd_t pmd)
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{
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*pmdp = pmd;
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flush_tlb_all();
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}
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void __init pagetable_init(void)
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{
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/* Initialize the entire pgd. */
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pgd_init(swapper_pg_dir);
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pgd_init(invalid_pg_dir);
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#ifndef __PAGETABLE_PUD_FOLDED
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pud_init(invalid_pud_table);
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#endif
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#ifndef __PAGETABLE_PMD_FOLDED
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pmd_init(invalid_pmd_table);
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#endif
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}
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