From 95099d4622f8cb224d94e314c7a8e0df60b13f87 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 09 Dec 2023 08:38:01 +0000
Subject: [PATCH] enable docker ppp
---
kernel/arch/powerpc/include/asm/page.h | 116 +++++++++++++++++++++++++---------------------------------
1 files changed, 50 insertions(+), 66 deletions(-)
diff --git a/kernel/arch/powerpc/include/asm/page.h b/kernel/arch/powerpc/include/asm/page.h
index f6a1265..03ae544 100644
--- a/kernel/arch/powerpc/include/asm/page.h
+++ b/kernel/arch/powerpc/include/asm/page.h
@@ -1,13 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef _ASM_POWERPC_PAGE_H
#define _ASM_POWERPC_PAGE_H
/*
* Copyright (C) 2001,2005 IBM Corporation.
- *
- * 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.
*/
#ifndef __ASSEMBLY__
@@ -20,28 +16,23 @@
/*
* On regular PPC32 page size is 4K (but we support 4K/16K/64K/256K pages
- * on PPC44x). For PPC64 we support either 4K or 64K software
+ * on PPC44x and 4K/16K on 8xx). For PPC64 we support either 4K or 64K software
* page size. When using 64K pages however, whether we are really supporting
* 64K pages in HW or not is irrelevant to those definitions.
*/
-#if defined(CONFIG_PPC_256K_PAGES)
-#define PAGE_SHIFT 18
-#elif defined(CONFIG_PPC_64K_PAGES)
-#define PAGE_SHIFT 16
-#elif defined(CONFIG_PPC_16K_PAGES)
-#define PAGE_SHIFT 14
-#else
-#define PAGE_SHIFT 12
-#endif
-
+#define PAGE_SHIFT CONFIG_PPC_PAGE_SHIFT
#define PAGE_SIZE (ASM_CONST(1) << PAGE_SHIFT)
#ifndef __ASSEMBLY__
-#ifdef CONFIG_HUGETLB_PAGE
-extern bool hugetlb_disabled;
-extern unsigned int HPAGE_SHIFT;
-#else
+#ifndef CONFIG_HUGETLB_PAGE
#define HPAGE_SHIFT PAGE_SHIFT
+#elif defined(CONFIG_PPC_BOOK3S_64)
+extern unsigned int hpage_shift;
+#define HPAGE_SHIFT hpage_shift
+#elif defined(CONFIG_PPC_8xx)
+#define HPAGE_SHIFT 19 /* 512k pages */
+#elif defined(CONFIG_PPC_FSL_BOOK3E)
+#define HPAGE_SHIFT 22 /* 4M pages */
#endif
#define HPAGE_SIZE ((1UL) << HPAGE_SHIFT)
#define HPAGE_MASK (~(HPAGE_SIZE - 1))
@@ -141,18 +132,11 @@
#define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr))
#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
-#ifdef CONFIG_PPC_BOOK3S_64
-/*
- * On hash the vmalloc and other regions alias to the kernel region when passed
- * through __pa(), which virt_to_pfn() uses. That means virt_addr_valid() can
- * return true for some vmalloc addresses, which is incorrect. So explicitly
- * check that the address is in the kernel region.
- */
-#define virt_addr_valid(kaddr) (REGION_ID(kaddr) == KERNEL_REGION_ID && \
- pfn_valid(virt_to_pfn(kaddr)))
-#else
-#define virt_addr_valid(kaddr) pfn_valid(virt_to_pfn(kaddr))
-#endif
+#define virt_addr_valid(vaddr) ({ \
+ unsigned long _addr = (unsigned long)vaddr; \
+ _addr >= PAGE_OFFSET && _addr < (unsigned long)high_memory && \
+ pfn_valid(virt_to_pfn(_addr)); \
+})
/*
* On Book-E parts we need __va to parse the device tree and we can't
@@ -229,15 +213,28 @@
*/
#if defined(CONFIG_PPC32) && defined(CONFIG_BOOKE)
#define __va(x) ((void *)(unsigned long)((phys_addr_t)(x) + VIRT_PHYS_OFFSET))
-#define __pa(x) ((unsigned long)(x) - VIRT_PHYS_OFFSET)
+#define __pa(x) ((phys_addr_t)(unsigned long)(x) - VIRT_PHYS_OFFSET)
#else
#ifdef CONFIG_PPC64
+
+#define VIRTUAL_WARN_ON(x) WARN_ON(IS_ENABLED(CONFIG_DEBUG_VIRTUAL) && (x))
+
/*
* gcc miscompiles (unsigned long)(&static_var) - PAGE_OFFSET
* with -mcmodel=medium, so we use & and | instead of - and + on 64-bit.
+ * This also results in better code generation.
*/
-#define __va(x) ((void *)(unsigned long)((phys_addr_t)(x) | PAGE_OFFSET))
-#define __pa(x) ((unsigned long)(x) & 0x0fffffffffffffffUL)
+#define __va(x) \
+({ \
+ VIRTUAL_WARN_ON((unsigned long)(x) >= PAGE_OFFSET); \
+ (void *)(unsigned long)((phys_addr_t)(x) | PAGE_OFFSET); \
+})
+
+#define __pa(x) \
+({ \
+ VIRTUAL_WARN_ON((unsigned long)(x) < PAGE_OFFSET); \
+ (unsigned long)(x) & 0x0fffffffffffffffUL; \
+})
#else /* 32-bit, non book E */
#define __va(x) ((void *)(unsigned long)((phys_addr_t)(x) + PAGE_OFFSET - MEMORY_START))
@@ -250,13 +247,8 @@
* and needs to be executable. This means the whole heap ends
* up being executable.
*/
-#define VM_DATA_DEFAULT_FLAGS32 \
- (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) | \
- VM_READ | VM_WRITE | \
- VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
-
-#define VM_DATA_DEFAULT_FLAGS64 (VM_READ | VM_WRITE | \
- VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+#define VM_DATA_DEFAULT_FLAGS32 VM_DATA_FLAGS_TSK_EXEC
+#define VM_DATA_DEFAULT_FLAGS64 VM_DATA_FLAGS_NON_EXEC
#ifdef __powerpc64__
#include <asm/page_64.h>
@@ -264,21 +256,16 @@
#include <asm/page_32.h>
#endif
-/* align addr on a size boundary - adjust address up/down if needed */
-#define _ALIGN_UP(addr, size) __ALIGN_KERNEL(addr, size)
-#define _ALIGN_DOWN(addr, size) ((addr)&(~((typeof(addr))(size)-1)))
-
-/* align addr on a size boundary - adjust address up if needed */
-#define _ALIGN(addr,size) _ALIGN_UP(addr,size)
-
/*
* Don't compare things with KERNELBASE or PAGE_OFFSET to test for
* "kernelness", use is_kernel_addr() - it should do what you want.
*/
#ifdef CONFIG_PPC_BOOK3E_64
#define is_kernel_addr(x) ((x) >= 0x8000000000000000ul)
-#else
+#elif defined(CONFIG_PPC_BOOK3S_64)
#define is_kernel_addr(x) ((x) >= PAGE_OFFSET)
+#else
+#define is_kernel_addr(x) ((x) >= TASK_SIZE)
#endif
#ifndef CONFIG_PPC_BOOK3S_64
@@ -289,7 +276,7 @@
* page tables at arbitrary addresses, this breaks and will have to change.
*/
#ifdef CONFIG_PPC64
-#define PD_HUGE 0x8000000000000000
+#define PD_HUGE 0x8000000000000000UL
#else
#define PD_HUGE 0x80000000
#endif
@@ -305,8 +292,13 @@
/*
* Some number of bits at the level of the page table that points to
* a hugepte are used to encode the size. This masks those bits.
+ * On 8xx, HW assistance requires 4k alignment for the hugepte.
*/
+#ifdef CONFIG_PPC_8xx
+#define HUGEPD_SHIFT_MASK 0xfff
+#else
#define HUGEPD_SHIFT_MASK 0x3f
+#endif
#ifndef __ASSEMBLY__
@@ -326,7 +318,6 @@
extern void clear_user_page(void *page, unsigned long vaddr, struct page *pg);
extern void copy_user_page(void *to, void *from, unsigned long vaddr,
struct page *p);
-extern int page_is_ram(unsigned long pfn);
extern int devmem_is_allowed(unsigned long pfn);
#ifdef CONFIG_PPC_SMLPAR
@@ -335,20 +326,13 @@
#endif
struct vm_area_struct;
-#ifdef CONFIG_PPC_BOOK3S_64
-/*
- * For BOOK3s 64 with 4k and 64K linux page size
- * we want to use pointers, because the page table
- * actually store pfn
- */
-typedef pte_t *pgtable_t;
-#else
-#if defined(CONFIG_PPC_64K_PAGES) && defined(CONFIG_PPC64)
-typedef pte_t *pgtable_t;
-#else
-typedef struct page *pgtable_t;
-#endif
-#endif
+
+extern unsigned long kernstart_virt_addr;
+
+static inline unsigned long kaslr_offset(void)
+{
+ return kernstart_virt_addr - KERNELBASE;
+}
#include <asm-generic/memory_model.h>
#endif /* __ASSEMBLY__ */
--
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