From 04dd17822334871b23ea2862f7798fb0e0007777 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 11 May 2024 08:53:19 +0000
Subject: [PATCH] change otg to host mode
---
kernel/arch/powerpc/mm/pgtable_64.c | 225 +++++++-------------------------------------------------
1 files changed, 28 insertions(+), 197 deletions(-)
diff --git a/kernel/arch/powerpc/mm/pgtable_64.c b/kernel/arch/powerpc/mm/pgtable_64.c
index 53e9eee..175aabf 100644
--- a/kernel/arch/powerpc/mm/pgtable_64.c
+++ b/kernel/arch/powerpc/mm/pgtable_64.c
@@ -1,5 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
- * This file contains ioremap and related functions for 64-bit machines.
+ * This file contains pgtable related functions for 64-bit machines.
*
* Derived from arch/ppc64/mm/init.c
* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
@@ -13,12 +14,6 @@
*
* Dave Engebretsen <engebret@us.ibm.com>
* Rework for PPC64 port.
- *
- * 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.
- *
*/
#include <linux/signal.h>
@@ -36,12 +31,9 @@
#include <linux/slab.h>
#include <linux/hugetlb.h>
-#include <asm/pgalloc.h>
#include <asm/page.h>
#include <asm/prom.h>
-#include <asm/io.h>
#include <asm/mmu_context.h>
-#include <asm/pgtable.h>
#include <asm/mmu.h>
#include <asm/smp.h>
#include <asm/machdep.h>
@@ -52,7 +44,7 @@
#include <asm/firmware.h>
#include <asm/dma.h>
-#include "mmu_decl.h"
+#include <mm/mmu_decl.h>
#ifdef CONFIG_PPC_BOOK3S_64
@@ -90,214 +82,42 @@
EXPORT_SYMBOL(__pgd_val_bits);
unsigned long __kernel_virt_start;
EXPORT_SYMBOL(__kernel_virt_start);
-unsigned long __kernel_virt_size;
-EXPORT_SYMBOL(__kernel_virt_size);
unsigned long __vmalloc_start;
EXPORT_SYMBOL(__vmalloc_start);
unsigned long __vmalloc_end;
EXPORT_SYMBOL(__vmalloc_end);
unsigned long __kernel_io_start;
EXPORT_SYMBOL(__kernel_io_start);
+unsigned long __kernel_io_end;
struct page *vmemmap;
EXPORT_SYMBOL(vmemmap);
unsigned long __pte_frag_nr;
EXPORT_SYMBOL(__pte_frag_nr);
unsigned long __pte_frag_size_shift;
EXPORT_SYMBOL(__pte_frag_size_shift);
-unsigned long ioremap_bot;
-#else /* !CONFIG_PPC_BOOK3S_64 */
-unsigned long ioremap_bot = IOREMAP_BASE;
#endif
-
-/**
- * __ioremap_at - Low level function to establish the page tables
- * for an IO mapping
- */
-void __iomem * __ioremap_at(phys_addr_t pa, void *ea, unsigned long size,
- unsigned long flags)
-{
- unsigned long i;
-
- /* Make sure we have the base flags */
- if ((flags & _PAGE_PRESENT) == 0)
- flags |= pgprot_val(PAGE_KERNEL);
-
- /* We don't support the 4K PFN hack with ioremap */
- if (flags & H_PAGE_4K_PFN)
- return NULL;
-
- WARN_ON(pa & ~PAGE_MASK);
- WARN_ON(((unsigned long)ea) & ~PAGE_MASK);
- WARN_ON(size & ~PAGE_MASK);
-
- for (i = 0; i < size; i += PAGE_SIZE)
- if (map_kernel_page((unsigned long)ea+i, pa+i, flags))
- return NULL;
-
- return (void __iomem *)ea;
-}
-
-/**
- * __iounmap_from - Low level function to tear down the page tables
- * for an IO mapping. This is used for mappings that
- * are manipulated manually, like partial unmapping of
- * PCI IOs or ISA space.
- */
-void __iounmap_at(void *ea, unsigned long size)
-{
- WARN_ON(((unsigned long)ea) & ~PAGE_MASK);
- WARN_ON(size & ~PAGE_MASK);
-
- unmap_kernel_range((unsigned long)ea, size);
-}
-
-void __iomem * __ioremap_caller(phys_addr_t addr, unsigned long size,
- unsigned long flags, void *caller)
-{
- phys_addr_t paligned;
- void __iomem *ret;
-
- /*
- * Choose an address to map it to.
- * Once the imalloc system is running, we use it.
- * Before that, we map using addresses going
- * up from ioremap_bot. imalloc will use
- * the addresses from ioremap_bot through
- * IMALLOC_END
- *
- */
- paligned = addr & PAGE_MASK;
- size = PAGE_ALIGN(addr + size) - paligned;
-
- if ((size == 0) || (paligned == 0))
- return NULL;
-
- if (slab_is_available()) {
- struct vm_struct *area;
-
- area = __get_vm_area_caller(size, VM_IOREMAP,
- ioremap_bot, IOREMAP_END,
- caller);
- if (area == NULL)
- return NULL;
-
- area->phys_addr = paligned;
- ret = __ioremap_at(paligned, area->addr, size, flags);
- if (!ret)
- vunmap(area->addr);
- } else {
- ret = __ioremap_at(paligned, (void *)ioremap_bot, size, flags);
- if (ret)
- ioremap_bot += size;
- }
-
- if (ret)
- ret += addr & ~PAGE_MASK;
- return ret;
-}
-
-void __iomem * __ioremap(phys_addr_t addr, unsigned long size,
- unsigned long flags)
-{
- return __ioremap_caller(addr, size, flags, __builtin_return_address(0));
-}
-
-void __iomem * ioremap(phys_addr_t addr, unsigned long size)
-{
- unsigned long flags = pgprot_val(pgprot_noncached(__pgprot(0)));
- void *caller = __builtin_return_address(0);
-
- if (ppc_md.ioremap)
- return ppc_md.ioremap(addr, size, flags, caller);
- return __ioremap_caller(addr, size, flags, caller);
-}
-
-void __iomem * ioremap_wc(phys_addr_t addr, unsigned long size)
-{
- unsigned long flags = pgprot_val(pgprot_noncached_wc(__pgprot(0)));
- void *caller = __builtin_return_address(0);
-
- if (ppc_md.ioremap)
- return ppc_md.ioremap(addr, size, flags, caller);
- return __ioremap_caller(addr, size, flags, caller);
-}
-
-void __iomem * ioremap_prot(phys_addr_t addr, unsigned long size,
- unsigned long flags)
-{
- void *caller = __builtin_return_address(0);
-
- /* writeable implies dirty for kernel addresses */
- if (flags & _PAGE_WRITE)
- flags |= _PAGE_DIRTY;
-
- /* we don't want to let _PAGE_EXEC leak out */
- flags &= ~_PAGE_EXEC;
- /*
- * Force kernel mapping.
- */
- flags &= ~_PAGE_USER;
- flags |= _PAGE_PRIVILEGED;
-
- if (ppc_md.ioremap)
- return ppc_md.ioremap(addr, size, flags, caller);
- return __ioremap_caller(addr, size, flags, caller);
-}
-
-
-/*
- * Unmap an IO region and remove it from imalloc'd list.
- * Access to IO memory should be serialized by driver.
- */
-void __iounmap(volatile void __iomem *token)
-{
- void *addr;
-
- if (!slab_is_available())
- return;
-
- addr = (void *) ((unsigned long __force)
- PCI_FIX_ADDR(token) & PAGE_MASK);
- if ((unsigned long)addr < ioremap_bot) {
- printk(KERN_WARNING "Attempt to iounmap early bolted mapping"
- " at 0x%p\n", addr);
- return;
- }
- vunmap(addr);
-}
-
-void iounmap(volatile void __iomem *token)
-{
- if (ppc_md.iounmap)
- ppc_md.iounmap(token);
- else
- __iounmap(token);
-}
-
-EXPORT_SYMBOL(ioremap);
-EXPORT_SYMBOL(ioremap_wc);
-EXPORT_SYMBOL(ioremap_prot);
-EXPORT_SYMBOL(__ioremap);
-EXPORT_SYMBOL(__ioremap_at);
-EXPORT_SYMBOL(iounmap);
-EXPORT_SYMBOL(__iounmap);
-EXPORT_SYMBOL(__iounmap_at);
#ifndef __PAGETABLE_PUD_FOLDED
/* 4 level page table */
-struct page *pgd_page(pgd_t pgd)
+struct page *p4d_page(p4d_t p4d)
{
- if (pgd_huge(pgd))
- return pte_page(pgd_pte(pgd));
- return virt_to_page(pgd_page_vaddr(pgd));
+ if (p4d_is_leaf(p4d)) {
+ if (!IS_ENABLED(CONFIG_HAVE_ARCH_HUGE_VMAP))
+ VM_WARN_ON(!p4d_huge(p4d));
+ return pte_page(p4d_pte(p4d));
+ }
+ return virt_to_page(p4d_pgtable(p4d));
}
#endif
struct page *pud_page(pud_t pud)
{
- if (pud_huge(pud))
+ if (pud_is_leaf(pud)) {
+ if (!IS_ENABLED(CONFIG_HAVE_ARCH_HUGE_VMAP))
+ VM_WARN_ON(!pud_huge(pud));
return pte_page(pud_pte(pud));
- return virt_to_page(pud_page_vaddr(pud));
+ }
+ return virt_to_page(pud_pgtable(pud));
}
/*
@@ -306,8 +126,16 @@
*/
struct page *pmd_page(pmd_t pmd)
{
- if (pmd_trans_huge(pmd) || pmd_huge(pmd) || pmd_devmap(pmd))
+ if (pmd_is_leaf(pmd)) {
+ /*
+ * vmalloc_to_page may be called on any vmap address (not only
+ * vmalloc), and it uses pmd_page() etc., when huge vmap is
+ * enabled so these checks can't be used.
+ */
+ if (!IS_ENABLED(CONFIG_HAVE_ARCH_HUGE_VMAP))
+ VM_WARN_ON(!(pmd_large(pmd) || pmd_huge(pmd)));
return pte_page(pmd_pte(pmd));
+ }
return virt_to_page(pmd_page_vaddr(pmd));
}
@@ -323,6 +151,9 @@
radix__mark_rodata_ro();
else
hash__mark_rodata_ro();
+
+ // mark_initmem_nx() should have already run by now
+ ptdump_check_wx();
}
void mark_initmem_nx(void)
--
Gitblit v1.6.2