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4c5e242d3e
ACPI firmware advertises PCI host bridge resources via PNP0A03 _CRS
methods. Some BIOSes include non-window address space in _CRS, and if we
allocate that non-window space for PCI devices, they don't work.
4dc2287c18 ("x86: avoid E820 regions when allocating address space")
works around this issue by clipping out any regions mentioned in the E820
table in the allocate_resource() path, but the implementation has a couple
issues:
- The clipping is done for *all* allocations, not just those for PCI
address space, and
- The clipping is done at each allocation instead of being done once when
setting up the host bridge windows.
Rework the implementation so we only clip PCI host bridge windows, and we
do it once when setting them up.
Example output changes:
BIOS-e820: [mem 0x00000000b0000000-0x00000000c00fffff] reserved
+ acpi PNP0A08:00: clipped [mem 0xc0000000-0xfebfffff window] to [mem 0xc0100000-0xfebfffff window] for e820 entry [mem 0xb0000000-0xc00fffff]
- pci_bus 0000:00: root bus resource [mem 0xc0000000-0xfebfffff window]
+ pci_bus 0000:00: root bus resource [mem 0xc0100000-0xfebfffff window]
Link: https://lore.kernel.org/r/20220304035110.988712-3-helgaas@kernel.org
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
61 lines
2.0 KiB
C
61 lines
2.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_E820_API_H
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#define _ASM_E820_API_H
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#include <asm/e820/types.h>
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struct device;
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struct resource;
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extern struct e820_table *e820_table;
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extern struct e820_table *e820_table_kexec;
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extern struct e820_table *e820_table_firmware;
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extern unsigned long pci_mem_start;
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extern bool e820__mapped_raw_any(u64 start, u64 end, enum e820_type type);
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extern bool e820__mapped_any(u64 start, u64 end, enum e820_type type);
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extern bool e820__mapped_all(u64 start, u64 end, enum e820_type type);
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extern void e820__range_add (u64 start, u64 size, enum e820_type type);
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extern u64 e820__range_update(u64 start, u64 size, enum e820_type old_type, enum e820_type new_type);
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extern u64 e820__range_remove(u64 start, u64 size, enum e820_type old_type, bool check_type);
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extern void e820__print_table(char *who);
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extern int e820__update_table(struct e820_table *table);
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extern void e820__update_table_print(void);
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extern unsigned long e820__end_of_ram_pfn(void);
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extern unsigned long e820__end_of_low_ram_pfn(void);
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extern u64 e820__memblock_alloc_reserved(u64 size, u64 align);
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extern void e820__memblock_setup(void);
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extern void e820__reserve_setup_data(void);
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extern void e820__finish_early_params(void);
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extern void e820__reserve_resources(void);
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extern void e820__reserve_resources_late(void);
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extern void e820__memory_setup(void);
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extern void e820__memory_setup_extended(u64 phys_addr, u32 data_len);
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extern char *e820__memory_setup_default(void);
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extern void e820__setup_pci_gap(void);
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extern void e820__reallocate_tables(void);
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extern void e820__register_nosave_regions(unsigned long limit_pfn);
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extern int e820__get_entry_type(u64 start, u64 end);
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extern void remove_e820_regions(struct device *dev, struct resource *avail);
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/*
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* Returns true iff the specified range [start,end) is completely contained inside
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* the ISA region.
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*/
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static inline bool is_ISA_range(u64 start, u64 end)
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{
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return start >= ISA_START_ADDRESS && end <= ISA_END_ADDRESS;
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}
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#endif /* _ASM_E820_API_H */
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