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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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4f89fa286f
Replace ghes_io{re,un}map_pfn_{nmi,irq}()s use of ioremap_page_range()
with __set_fixmap() as ioremap_page_range() may sleep to allocate a new
level of page-table, even if its passed an existing final-address to
use in the mapping.
The GHES driver can only be enabled for architectures that select
HAVE_ACPI_APEI: Add fixmap entries to both x86 and arm64.
clear_fixmap() does the TLB invalidation in __set_fixmap() for arm64
and __set_pte_vaddr() for x86. In each case its the same as the
respective arch_apei_flush_tlb_one().
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: James Morse <james.morse@arm.com>
Reviewed-by: Borislav Petkov <bp@suse.de>
Tested-by: Tyler Baicar <tbaicar@codeaurora.org>
Tested-by: Toshi Kani <toshi.kani@hpe.com>
[ For the arm64 bits: ]
Acked-by: Will Deacon <will.deacon@arm.com>
[ For the x86 bits: ]
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: All applicable <stable@vger.kernel.org>
104 lines
2.7 KiB
C
104 lines
2.7 KiB
C
/*
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* fixmap.h: compile-time virtual memory allocation
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1998 Ingo Molnar
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* Copyright (C) 2013 Mark Salter <msalter@redhat.com>
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*
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* Adapted from arch/x86 version.
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*
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*/
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#ifndef _ASM_ARM64_FIXMAP_H
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#define _ASM_ARM64_FIXMAP_H
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#ifndef __ASSEMBLY__
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#include <linux/kernel.h>
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#include <linux/sizes.h>
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#include <asm/boot.h>
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#include <asm/page.h>
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#include <asm/pgtable-prot.h>
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/*
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* Here we define all the compile-time 'special' virtual
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* addresses. The point is to have a constant address at
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* compile time, but to set the physical address only
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* in the boot process.
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*
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* These 'compile-time allocated' memory buffers are
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* page-sized. Use set_fixmap(idx,phys) to associate
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* physical memory with fixmap indices.
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*
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*/
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enum fixed_addresses {
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FIX_HOLE,
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/*
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* Reserve a virtual window for the FDT that is 2 MB larger than the
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* maximum supported size, and put it at the top of the fixmap region.
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* The additional space ensures that any FDT that does not exceed
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* MAX_FDT_SIZE can be mapped regardless of whether it crosses any
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* 2 MB alignment boundaries.
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*
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* Keep this at the top so it remains 2 MB aligned.
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*/
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#define FIX_FDT_SIZE (MAX_FDT_SIZE + SZ_2M)
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FIX_FDT_END,
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FIX_FDT = FIX_FDT_END + FIX_FDT_SIZE / PAGE_SIZE - 1,
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FIX_EARLYCON_MEM_BASE,
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FIX_TEXT_POKE0,
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#ifdef CONFIG_ACPI_APEI_GHES
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/* Used for GHES mapping from assorted contexts */
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FIX_APEI_GHES_IRQ,
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FIX_APEI_GHES_NMI,
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#endif /* CONFIG_ACPI_APEI_GHES */
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__end_of_permanent_fixed_addresses,
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/*
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* Temporary boot-time mappings, used by early_ioremap(),
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* before ioremap() is functional.
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*/
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#define NR_FIX_BTMAPS (SZ_256K / PAGE_SIZE)
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#define FIX_BTMAPS_SLOTS 7
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#define TOTAL_FIX_BTMAPS (NR_FIX_BTMAPS * FIX_BTMAPS_SLOTS)
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FIX_BTMAP_END = __end_of_permanent_fixed_addresses,
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FIX_BTMAP_BEGIN = FIX_BTMAP_END + TOTAL_FIX_BTMAPS - 1,
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/*
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* Used for kernel page table creation, so unmapped memory may be used
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* for tables.
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*/
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FIX_PTE,
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FIX_PMD,
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FIX_PUD,
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FIX_PGD,
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__end_of_fixed_addresses
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};
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#define FIXADDR_SIZE (__end_of_permanent_fixed_addresses << PAGE_SHIFT)
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#define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE)
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#define FIXMAP_PAGE_IO __pgprot(PROT_DEVICE_nGnRE)
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void __init early_fixmap_init(void);
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#define __early_set_fixmap __set_fixmap
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#define __late_set_fixmap __set_fixmap
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#define __late_clear_fixmap(idx) __set_fixmap((idx), 0, FIXMAP_PAGE_CLEAR)
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extern void __set_fixmap(enum fixed_addresses idx, phys_addr_t phys, pgprot_t prot);
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#include <asm-generic/fixmap.h>
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#endif /* !__ASSEMBLY__ */
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#endif /* _ASM_ARM64_FIXMAP_H */
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