diff options
| author | Jonathan Zhang <jonzhang@fb.com> | 2020-10-08 10:35:05 -0700 |
|---|---|---|
| committer | Philipp Deppenwiese <zaolin.daisuki@gmail.com> | 2020-10-09 16:24:43 +0000 |
| commit | 1c3fef2ca93dcdf2bca81a486fd3120476196760 (patch) | |
| tree | 5b15a12ea7928f2842b5449a13662877c7925853 /src/soc | |
| parent | 26d16527152f6ed93f580c26fb5ead3bdb4117f5 (diff) | |
soc/intel/xeon_sp/cpx: skip DRHD generation for non-PCIe stack
Without skipping of DRHD generation for non-PCIe stack, the OS
kernel detects incorrect DMAR table with following messages:
[ 0.561817] Your BIOS is broken; DMAR reported at address 0
Signed-off-by: Jonathan Zhang <jonzhang@fb.com>
Change-Id: I098605daf12a264f390613581427ec722afcddaf
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45887
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Diffstat (limited to 'src/soc')
| -rw-r--r-- | src/soc/intel/xeon_sp/cpx/soc_acpi.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/soc/intel/xeon_sp/cpx/soc_acpi.c b/src/soc/intel/xeon_sp/cpx/soc_acpi.c index b0352d8567..a9af4aa3ce 100644 --- a/src/soc/intel/xeon_sp/cpx/soc_acpi.c +++ b/src/soc/intel/xeon_sp/cpx/soc_acpi.c @@ -457,6 +457,10 @@ static unsigned long acpi_create_drhd(unsigned long current, int socket, printk(BIOS_SPEW, "%s socket: %d, stack: %d, bus: 0x%x, pcie_seg: 0x%x, reg_base: 0x%x\n", __func__, socket, stack, bus, pcie_seg, reg_base); + /* Do not generate DRHD for non-PCIe stack */ + if (!reg_base) + return current; + // Add DRHD Hardware Unit if (socket == 0 && stack == CSTACK) { printk(BIOS_DEBUG, "[Hardware Unit Definition] Flags: 0x%x, PCI Segment Number: 0x%x, " |