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| author | Shuo Liu <shuo.liu@intel.com> | 2024-06-25 19:04:11 +0800 |
|---|---|---|
| committer | Lean Sheng Tan <sheng.tan@9elements.com> | 2024-06-28 11:27:27 +0000 |
| commit | bcd247376633b0fb4f1dbfbf8c2e02d2c926adec (patch) | |
| tree | d23179c3e099d34f76ff64ea08af8308061bf34b /src/soc/intel/xeon_sp/uncore_acpi.c | |
| parent | 57027571187c17ec8617ddaffc2148d878f5c06f (diff) | |
acpi: Add support for DRHD size reporting
VT-d spec 4.0 supports size definition for DRHD BAR to support DRHD
sizes larger than 4KB. If the value in the field is N, the size of
the register set is 2^N 4 KB pages.
Some latest OS (e.g. Linux kernel 6.5) will have VTd driver trying
to use the beyond 4KB part of the DRHD BAR if they exist. They need
the DRHD size field to set up page mapping before access those
registers.
Re-add acpi_create_dmar_drhd with a size parameter to support the
needs.
TEST=Build and boot on intel/archercity CRB
Change-Id: I49dd5de2eca257a5f6240e36d05755cabca96d1c
Signed-off-by: Shuo Liu <shuo.liu@intel.com>
Signed-off-by: Gang Chen <gang.c.chen@intel.com>
Signed-off-by: Jincheng Li <jincheng.li@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/82429
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/soc/intel/xeon_sp/uncore_acpi.c')
0 files changed, 0 insertions, 0 deletions