mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-13 23:34:05 +08:00
dmar: fix using early fixmap mapping for DMAR table parsing
Very early detection of the DMAR tables will setup fixmap mapping. For parsing these tables later (while enabling dma and/or interrupt remapping), early fixmap mapping shouldn't be used. Fix it by calling table detection routines again, which will call generic apci_get_table() for setting up the correct mapping. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
parent
a11b5abef5
commit
f6dd5c3106
@ -289,6 +289,24 @@ dmar_table_print_dmar_entry(struct acpi_dmar_header *header)
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* dmar_table_detect - checks to see if the platform supports DMAR devices
|
||||
*/
|
||||
static int __init dmar_table_detect(void)
|
||||
{
|
||||
acpi_status status = AE_OK;
|
||||
|
||||
/* if we could find DMAR table, then there are DMAR devices */
|
||||
status = acpi_get_table(ACPI_SIG_DMAR, 0,
|
||||
(struct acpi_table_header **)&dmar_tbl);
|
||||
|
||||
if (ACPI_SUCCESS(status) && !dmar_tbl) {
|
||||
printk (KERN_WARNING PREFIX "Unable to map DMAR\n");
|
||||
status = AE_NOT_FOUND;
|
||||
}
|
||||
|
||||
return (ACPI_SUCCESS(status) ? 1 : 0);
|
||||
}
|
||||
|
||||
/**
|
||||
* parse_dmar_table - parses the DMA reporting table
|
||||
@ -300,6 +318,12 @@ parse_dmar_table(void)
|
||||
struct acpi_dmar_header *entry_header;
|
||||
int ret = 0;
|
||||
|
||||
/*
|
||||
* Do it again, earlier dmar_tbl mapping could be mapped with
|
||||
* fixed map.
|
||||
*/
|
||||
dmar_table_detect();
|
||||
|
||||
dmar = (struct acpi_table_dmar *)dmar_tbl;
|
||||
if (!dmar)
|
||||
return -ENODEV;
|
||||
@ -430,30 +454,11 @@ int __init dmar_table_init(void)
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* early_dmar_detect - checks to see if the platform supports DMAR devices
|
||||
*/
|
||||
int __init early_dmar_detect(void)
|
||||
{
|
||||
acpi_status status = AE_OK;
|
||||
|
||||
/* if we could find DMAR table, then there are DMAR devices */
|
||||
status = acpi_get_table(ACPI_SIG_DMAR, 0,
|
||||
(struct acpi_table_header **)&dmar_tbl);
|
||||
|
||||
if (ACPI_SUCCESS(status) && !dmar_tbl) {
|
||||
printk (KERN_WARNING PREFIX "Unable to map DMAR\n");
|
||||
status = AE_NOT_FOUND;
|
||||
}
|
||||
|
||||
return (ACPI_SUCCESS(status) ? 1 : 0);
|
||||
}
|
||||
|
||||
void __init detect_intel_iommu(void)
|
||||
{
|
||||
int ret;
|
||||
|
||||
ret = early_dmar_detect();
|
||||
ret = dmar_table_detect();
|
||||
|
||||
#ifdef CONFIG_DMAR
|
||||
{
|
||||
@ -479,14 +484,16 @@ void __init detect_intel_iommu(void)
|
||||
" x2apic support\n");
|
||||
|
||||
dmar_disabled = 1;
|
||||
return;
|
||||
goto end;
|
||||
}
|
||||
|
||||
if (ret && !no_iommu && !iommu_detected && !swiotlb &&
|
||||
!dmar_disabled)
|
||||
iommu_detected = 1;
|
||||
}
|
||||
end:
|
||||
#endif
|
||||
dmar_tbl = NULL;
|
||||
}
|
||||
|
||||
|
||||
|
@ -45,7 +45,6 @@ extern struct list_head dmar_drhd_units;
|
||||
list_for_each_entry(drhd, &dmar_drhd_units, list)
|
||||
|
||||
extern int dmar_table_init(void);
|
||||
extern int early_dmar_detect(void);
|
||||
extern int dmar_dev_scope_init(void);
|
||||
|
||||
/* Intel IOMMU detection */
|
||||
|
Loading…
Reference in New Issue
Block a user