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cb7cf772d8
The BAD_MADT_GICC_ENTRY() macro checks if a GICC MADT entry passes
muster from an ACPI specification standpoint. Current macro detects the
MADT GICC entry length through ACPI firmware version (it changed from 76
to 80 bytes in the transition from ACPI 5.1 to ACPI 6.0 specification)
but always uses (erroneously) the ACPICA (latest) struct (ie struct
acpi_madt_generic_interrupt - that is 80-bytes long) length to check if
the current GICC entry memory record exceeds the MADT table end in
memory as defined by the MADT table header itself, which may result in
false negatives depending on the ACPI firmware version and how the MADT
entries are laid out in memory (ie on ACPI 5.1 firmware MADT GICC
entries are 76 bytes long, so by adding 80 to a GICC entry start address
in memory the resulting address may well be past the actual MADT end,
triggering a false negative).
Fix the BAD_MADT_GICC_ENTRY() macro by reshuffling the condition checks
and update them to always use the firmware version specific MADT GICC
entry length in order to carry out boundary checks.
Fixes: b6cfb27737 ("ACPI / ARM64: add BAD_MADT_GICC_ENTRY() macro")
Reported-by: Julien Grall <julien.grall@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Julien Grall <julien.grall@arm.com>
Cc: Hanjun Guo <hanjun.guo@linaro.org>
Cc: Al Stone <ahs3@redhat.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
153 lines
4.4 KiB
C
153 lines
4.4 KiB
C
/*
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* Copyright (C) 2013-2014, Linaro Ltd.
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* Author: Al Stone <al.stone@linaro.org>
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* Author: Graeme Gregory <graeme.gregory@linaro.org>
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* Author: Hanjun Guo <hanjun.guo@linaro.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation;
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*/
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#ifndef _ASM_ACPI_H
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#define _ASM_ACPI_H
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#include <linux/memblock.h>
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#include <linux/psci.h>
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#include <asm/cputype.h>
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#include <asm/smp_plat.h>
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#include <asm/tlbflush.h>
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/* Macros for consistency checks of the GICC subtable of MADT */
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#define ACPI_MADT_GICC_LENGTH \
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(acpi_gbl_FADT.header.revision < 6 ? 76 : 80)
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#define BAD_MADT_GICC_ENTRY(entry, end) \
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(!(entry) || (entry)->header.length != ACPI_MADT_GICC_LENGTH || \
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(unsigned long)(entry) + ACPI_MADT_GICC_LENGTH > (end))
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/* Basic configuration for ACPI */
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#ifdef CONFIG_ACPI
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/* ACPI table mapping after acpi_permanent_mmap is set */
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static inline void __iomem *acpi_os_ioremap(acpi_physical_address phys,
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acpi_size size)
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{
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/*
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* EFI's reserve_regions() call adds memory with the WB attribute
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* to memblock via early_init_dt_add_memory_arch().
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*/
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if (!memblock_is_memory(phys))
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return ioremap(phys, size);
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return ioremap_cache(phys, size);
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}
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#define acpi_os_ioremap acpi_os_ioremap
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typedef u64 phys_cpuid_t;
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#define PHYS_CPUID_INVALID INVALID_HWID
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#define acpi_strict 1 /* No out-of-spec workarounds on ARM64 */
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extern int acpi_disabled;
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extern int acpi_noirq;
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extern int acpi_pci_disabled;
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static inline void disable_acpi(void)
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{
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acpi_disabled = 1;
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acpi_pci_disabled = 1;
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acpi_noirq = 1;
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}
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static inline void enable_acpi(void)
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{
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acpi_disabled = 0;
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acpi_pci_disabled = 0;
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acpi_noirq = 0;
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}
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/*
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* The ACPI processor driver for ACPI core code needs this macro
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* to find out this cpu was already mapped (mapping from CPU hardware
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* ID to CPU logical ID) or not.
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*/
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#define cpu_physical_id(cpu) cpu_logical_map(cpu)
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/*
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* It's used from ACPI core in kdump to boot UP system with SMP kernel,
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* with this check the ACPI core will not override the CPU index
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* obtained from GICC with 0 and not print some error message as well.
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* Since MADT must provide at least one GICC structure for GIC
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* initialization, CPU will be always available in MADT on ARM64.
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*/
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static inline bool acpi_has_cpu_in_madt(void)
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{
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return true;
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}
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struct acpi_madt_generic_interrupt *acpi_cpu_get_madt_gicc(int cpu);
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static inline void arch_fix_phys_package_id(int num, u32 slot) { }
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void __init acpi_init_cpus(void);
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#else
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static inline void acpi_init_cpus(void) { }
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#endif /* CONFIG_ACPI */
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#ifdef CONFIG_ARM64_ACPI_PARKING_PROTOCOL
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bool acpi_parking_protocol_valid(int cpu);
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void __init
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acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor);
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#else
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static inline bool acpi_parking_protocol_valid(int cpu) { return false; }
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static inline void
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acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor)
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{}
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#endif
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static inline const char *acpi_get_enable_method(int cpu)
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{
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if (acpi_psci_present())
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return "psci";
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if (acpi_parking_protocol_valid(cpu))
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return "parking-protocol";
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return NULL;
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}
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#ifdef CONFIG_ACPI_APEI
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/*
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* acpi_disable_cmcff is used in drivers/acpi/apei/hest.c for disabling
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* IA-32 Architecture Corrected Machine Check (CMC) Firmware-First mode
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* with a kernel command line parameter "acpi=nocmcoff". But we don't
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* have this IA-32 specific feature on ARM64, this definition is only
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* for compatibility.
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*/
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#define acpi_disable_cmcff 1
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pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr);
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/*
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* Despite its name, this function must still broadcast the TLB
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* invalidation in order to ensure other CPUs don't end up with junk
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* entries as a result of speculation. Unusually, its also called in
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* IRQ context (ghes_iounmap_irq) so if we ever need to use IPIs for
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* TLB broadcasting, then we're in trouble here.
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*/
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static inline void arch_apei_flush_tlb_one(unsigned long addr)
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{
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flush_tlb_kernel_range(addr, addr + PAGE_SIZE);
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}
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#endif /* CONFIG_ACPI_APEI */
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#ifdef CONFIG_ACPI_NUMA
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int arm64_acpi_numa_init(void);
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int acpi_numa_get_nid(unsigned int cpu, u64 hwid);
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#else
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static inline int arm64_acpi_numa_init(void) { return -ENOSYS; }
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static inline int acpi_numa_get_nid(unsigned int cpu, u64 hwid) { return NUMA_NO_NODE; }
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#endif /* CONFIG_ACPI_NUMA */
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#define ACPI_TABLE_UPGRADE_MAX_PHYS MEMBLOCK_ALLOC_ACCESSIBLE
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#endif /*_ASM_ACPI_H*/
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