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ACPI, Record ACPI NVS regions

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Some firmware will access memory in ACPI NVS region via APEI.  That
is, instructions in APEI ERST/EINJ table will read/write ACPI NVS
region.  The original resource conflict checking in APEI code will
check memory/ioport accessed by APEI via general resource management
mechanism.  But ACPI NVS region is marked as busy already, so that the
false resource conflict will prevent APEI ERST/EINJ to work.

To fix this, this patch record ACPI NVS regions, so that we can avoid
request resources for memory region inside it.

Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Huang Ying 2011-12-08 11:25:49 +08:00 • committed by Len Brown
parent b4e008dc53
commit b54ac6d2a2
4 changed files with 70 additions and 10 deletions
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20
include/linux/acpi.h
View file

@ -306,6 +306,11 @@ extern acpi_status acpi_pci_osc_control_set(acpi_handle handle,
u32 *mask, u32 req);
extern void acpi_early_init(void);
extern int acpi_nvs_register(__u64 start, __u64 size);
extern int acpi_nvs_for_each_region(int (*func)(__u64, __u64, void *),
void *data);
#else /* !CONFIG_ACPI */
#define acpi_disabled 1
@ -348,15 +353,18 @@ static inline int acpi_table_parse(char *id,
{
return -1;
}
#endif /* !CONFIG_ACPI */
#ifdef CONFIG_ACPI_SLEEP
int suspend_nvs_register(unsigned long start, unsigned long size);
#else
static inline int suspend_nvs_register(unsigned long a, unsigned long b)
static inline int acpi_nvs_register(__u64 start, __u64 size)
{
return 0;
}
#endif
static inline int acpi_nvs_for_each_region(int (*func)(__u64, __u64, void *),
void *data)
{
return 0;
}
#endif /* !CONFIG_ACPI */
#endif /*_LINUX_ACPI_H*/