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Diffstat (limited to '')
| -rw-r--r-- | debian/patches-rt/0038-powerpc-mm-highmem-Switch-to-generic-kmap-atomic.patch | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/debian/patches-rt/0038-powerpc-mm-highmem-Switch-to-generic-kmap-atomic.patch b/debian/patches-rt/0038-powerpc-mm-highmem-Switch-to-generic-kmap-atomic.patch new file mode 100644 index 000000000..92e962c1f --- /dev/null +++ b/debian/patches-rt/0038-powerpc-mm-highmem-Switch-to-generic-kmap-atomic.patch @@ -0,0 +1,221 @@ +From 6d7d749a6b27ada63e8be5d1903d336538b40702 Mon Sep 17 00:00:00 2001 +From: Thomas Gleixner <tglx@linutronix.de> +Date: Tue, 3 Nov 2020 10:27:27 +0100 +Subject: [PATCH 038/323] powerpc/mm/highmem: Switch to generic kmap atomic +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/5.10/older/patches-5.10.204-rt100.tar.xz + +No reason having the same code in every architecture + +Signed-off-by: Thomas Gleixner <tglx@linutronix.de> +Cc: Michael Ellerman <mpe@ellerman.id.au> +Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> +Cc: Paul Mackerras <paulus@samba.org> +Cc: linuxppc-dev@lists.ozlabs.org +Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> +--- + arch/powerpc/Kconfig | 1 + + arch/powerpc/include/asm/fixmap.h | 4 +- + arch/powerpc/include/asm/highmem.h | 7 ++- + arch/powerpc/include/asm/kmap_types.h | 13 ------ + arch/powerpc/mm/Makefile | 1 - + arch/powerpc/mm/highmem.c | 67 --------------------------- + arch/powerpc/mm/mem.c | 7 --- + 7 files changed, 8 insertions(+), 92 deletions(-) + delete mode 100644 arch/powerpc/include/asm/kmap_types.h + delete mode 100644 arch/powerpc/mm/highmem.c + +diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig +index 78dd6be8b31d..b3ab6c2d9f66 100644 +--- a/arch/powerpc/Kconfig ++++ b/arch/powerpc/Kconfig +@@ -410,6 +410,7 @@ menu "Kernel options" + config HIGHMEM + bool "High memory support" + depends on PPC32 ++ select KMAP_LOCAL + + source "kernel/Kconfig.hz" + +diff --git a/arch/powerpc/include/asm/fixmap.h b/arch/powerpc/include/asm/fixmap.h +index 897cc68758d4..a832aeafe560 100644 +--- a/arch/powerpc/include/asm/fixmap.h ++++ b/arch/powerpc/include/asm/fixmap.h +@@ -20,7 +20,7 @@ + #include <asm/page.h> + #ifdef CONFIG_HIGHMEM + #include <linux/threads.h> +-#include <asm/kmap_types.h> ++#include <asm/kmap_size.h> + #endif + + #ifdef CONFIG_PPC64 +@@ -61,7 +61,7 @@ enum fixed_addresses { + FIX_EARLY_DEBUG_BASE = FIX_EARLY_DEBUG_TOP+(ALIGN(SZ_128K, PAGE_SIZE)/PAGE_SIZE)-1, + #ifdef CONFIG_HIGHMEM + FIX_KMAP_BEGIN, /* reserved pte's for temporary kernel mappings */ +- FIX_KMAP_END = FIX_KMAP_BEGIN+(KM_TYPE_NR*NR_CPUS)-1, ++ FIX_KMAP_END = FIX_KMAP_BEGIN + (KM_MAX_IDX * NR_CPUS) - 1, + #endif + #ifdef CONFIG_PPC_8xx + /* For IMMR we need an aligned 512K area */ +diff --git a/arch/powerpc/include/asm/highmem.h b/arch/powerpc/include/asm/highmem.h +index 104026f7d6bc..80a5ae771c65 100644 +--- a/arch/powerpc/include/asm/highmem.h ++++ b/arch/powerpc/include/asm/highmem.h +@@ -24,12 +24,10 @@ + #ifdef __KERNEL__ + + #include <linux/interrupt.h> +-#include <asm/kmap_types.h> + #include <asm/cacheflush.h> + #include <asm/page.h> + #include <asm/fixmap.h> + +-extern pte_t *kmap_pte; + extern pte_t *pkmap_page_table; + + /* +@@ -60,6 +58,11 @@ extern pte_t *pkmap_page_table; + + #define flush_cache_kmaps() flush_cache_all() + ++#define arch_kmap_local_post_map(vaddr, pteval) \ ++ local_flush_tlb_page(NULL, vaddr) ++#define arch_kmap_local_post_unmap(vaddr) \ ++ local_flush_tlb_page(NULL, vaddr) ++ + #endif /* __KERNEL__ */ + + #endif /* _ASM_HIGHMEM_H */ +diff --git a/arch/powerpc/include/asm/kmap_types.h b/arch/powerpc/include/asm/kmap_types.h +deleted file mode 100644 +index c8fa182d48c8..000000000000 +--- a/arch/powerpc/include/asm/kmap_types.h ++++ /dev/null +@@ -1,13 +0,0 @@ +-/* SPDX-License-Identifier: GPL-2.0-or-later */ +-#ifndef _ASM_POWERPC_KMAP_TYPES_H +-#define _ASM_POWERPC_KMAP_TYPES_H +- +-#ifdef __KERNEL__ +- +-/* +- */ +- +-#define KM_TYPE_NR 16 +- +-#endif /* __KERNEL__ */ +-#endif /* _ASM_POWERPC_KMAP_TYPES_H */ +diff --git a/arch/powerpc/mm/Makefile b/arch/powerpc/mm/Makefile +index 55b4a8bd408a..3b4e9e4e25ea 100644 +--- a/arch/powerpc/mm/Makefile ++++ b/arch/powerpc/mm/Makefile +@@ -16,7 +16,6 @@ obj-$(CONFIG_NEED_MULTIPLE_NODES) += numa.o + obj-$(CONFIG_PPC_MM_SLICES) += slice.o + obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o + obj-$(CONFIG_NOT_COHERENT_CACHE) += dma-noncoherent.o +-obj-$(CONFIG_HIGHMEM) += highmem.o + obj-$(CONFIG_PPC_COPRO_BASE) += copro_fault.o + obj-$(CONFIG_PPC_PTDUMP) += ptdump/ + obj-$(CONFIG_KASAN) += kasan/ +diff --git a/arch/powerpc/mm/highmem.c b/arch/powerpc/mm/highmem.c +deleted file mode 100644 +index 624b4438aff9..000000000000 +--- a/arch/powerpc/mm/highmem.c ++++ /dev/null +@@ -1,67 +0,0 @@ +-// SPDX-License-Identifier: GPL-2.0 +-/* +- * highmem.c: virtual kernel memory mappings for high memory +- * +- * PowerPC version, stolen from the i386 version. +- * +- * Used in CONFIG_HIGHMEM systems for memory pages which +- * are not addressable by direct kernel virtual addresses. +- * +- * Copyright (C) 1999 Gerhard Wichert, Siemens AG +- * Gerhard.Wichert@pdb.siemens.de +- * +- * +- * Redesigned the x86 32-bit VM architecture to deal with +- * up to 16 Terrabyte physical memory. With current x86 CPUs +- * we now support up to 64 Gigabytes physical RAM. +- * +- * Copyright (C) 1999 Ingo Molnar <mingo@redhat.com> +- * +- * Reworked for PowerPC by various contributors. Moved from +- * highmem.h by Benjamin Herrenschmidt (c) 2009 IBM Corp. +- */ +- +-#include <linux/highmem.h> +-#include <linux/module.h> +- +-void *kmap_atomic_high_prot(struct page *page, pgprot_t prot) +-{ +- unsigned long vaddr; +- int idx, type; +- +- type = kmap_atomic_idx_push(); +- idx = type + KM_TYPE_NR*smp_processor_id(); +- vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx); +- WARN_ON(IS_ENABLED(CONFIG_DEBUG_HIGHMEM) && !pte_none(*(kmap_pte - idx))); +- __set_pte_at(&init_mm, vaddr, kmap_pte-idx, mk_pte(page, prot), 1); +- local_flush_tlb_page(NULL, vaddr); +- +- return (void*) vaddr; +-} +-EXPORT_SYMBOL(kmap_atomic_high_prot); +- +-void kunmap_atomic_high(void *kvaddr) +-{ +- unsigned long vaddr = (unsigned long) kvaddr & PAGE_MASK; +- +- if (vaddr < __fix_to_virt(FIX_KMAP_END)) +- return; +- +- if (IS_ENABLED(CONFIG_DEBUG_HIGHMEM)) { +- int type = kmap_atomic_idx(); +- unsigned int idx; +- +- idx = type + KM_TYPE_NR * smp_processor_id(); +- WARN_ON(vaddr != __fix_to_virt(FIX_KMAP_BEGIN + idx)); +- +- /* +- * force other mappings to Oops if they'll try to access +- * this pte without first remap it +- */ +- pte_clear(&init_mm, vaddr, kmap_pte-idx); +- local_flush_tlb_page(NULL, vaddr); +- } +- +- kmap_atomic_idx_pop(); +-} +-EXPORT_SYMBOL(kunmap_atomic_high); +diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c +index 08e3422eb792..1faa0789871d 100644 +--- a/arch/powerpc/mm/mem.c ++++ b/arch/powerpc/mm/mem.c +@@ -63,11 +63,6 @@ + unsigned long long memory_limit; + bool init_mem_is_free; + +-#ifdef CONFIG_HIGHMEM +-pte_t *kmap_pte; +-EXPORT_SYMBOL(kmap_pte); +-#endif +- + pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, + unsigned long size, pgprot_t vma_prot) + { +@@ -237,8 +232,6 @@ void __init paging_init(void) + + map_kernel_page(PKMAP_BASE, 0, __pgprot(0)); /* XXX gross */ + pkmap_page_table = virt_to_kpte(PKMAP_BASE); +- +- kmap_pte = virt_to_kpte(__fix_to_virt(FIX_KMAP_BEGIN)); + #endif /* CONFIG_HIGHMEM */ + + printk(KERN_DEBUG "Top of RAM: 0x%llx, Total RAM: 0x%llx\n", +-- +2.43.0 + |