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nb/intel/sandybridge/acpi.c: Add RMRRs after all DRHDs 

The VT-d architecture specification (Doc. D51397-011, Rev. 3.1) says:

 BIOS implementations must report these remapping structure types in
 numerical order. i.e., All remapping structures of type 0 (DRHD)
 enumerated before remapping structures of type 1 (RMRR), and so forth.

So, update the corresponding code to adhere to the specification.

Change-Id: I1f84cae41c6281e0d545669f1e7de5cab0d9f9c0
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44109
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
This commit is contained in:
Angel Pons 2020-08-03 12:02:20 +02:00
parent 579ccdf9c9
commit 9dfd6150bd
1 changed files with 22 additions and 16 deletions
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26
src/northbridge/intel/sandybridge/acpi.c
View File

@ -73,24 +73,17 @@ static unsigned long acpi_fill_dmar(unsigned long current)
{
const struct device *const igfx = pcidev_on_root(2, 0);
/* First, add DRHD entries */
if (igfx && igfx->enabled) {
unsigned long tmp;
const unsigned long tmp = current;
tmp = current;
current += acpi_create_dmar_drhd(current, 0, 0, GFXVT_BASE);
current += acpi_create_dmar_ds_pci(current, 0, 2, 0);
current += acpi_create_dmar_ds_pci(current, 0, 2, 1);
acpi_dmar_drhd_fixup(tmp, current);
tmp = current;
current += acpi_create_igfx_rmrr(current);
if (current != tmp) {
current += acpi_create_dmar_ds_pci(current, 0, 2, 0);
current += acpi_create_dmar_ds_pci(current, 0, 2, 1);
acpi_dmar_rmrr_fixup(tmp, current);
}
}
{
const unsigned long tmp = current;
current += acpi_create_dmar_drhd(current, DRHD_INCLUDE_PCI_ALL, 0, VTVC0_BASE);
@ -103,6 +96,19 @@ static unsigned long acpi_fill_dmar(unsigned long current)
PCH_HPET_PCI_SLOT, i);
acpi_dmar_drhd_fixup(tmp, current);
}
/* Then, add RMRR entries after all DRHD entries */
if (igfx && igfx->enabled) {
const unsigned long tmp = current;
current += acpi_create_igfx_rmrr(current);
if (current != tmp) {
current += acpi_create_dmar_ds_pci(current, 0, 2, 0);
current += acpi_create_dmar_ds_pci(current, 0, 2, 1);
acpi_dmar_rmrr_fixup(tmp, current);
}
}
return current;
}