| /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| |
| #include <soc/acpi.h> |
| #include <soc/numa.h> |
| #include <soc/util.h> |
| |
| unsigned long cxl_fill_srat(unsigned long current) |
| { |
| /* |
| * Create Generic Initiator Affinity structure |
| * and Memory Affinity structure for CXL memory. |
| * In the pds (Proximity Domains structure), Generic Initiator domains |
| * are after processor domains. |
| */ |
| uint32_t base, size; |
| for (uint8_t i = 0; i < pds.num_pds; i++) { |
| if (pds.pds[i].pd_type != PD_TYPE_GENERIC_INITIATOR) |
| continue; |
| if (!pds.pds[i].dev) |
| continue; |
| |
| printk(BIOS_DEBUG, "adding srat GIA ID: %d, dev: %s\n", i, dev_path(pds.pds[i].dev)); |
| /* flags: 1 (enabled) */ |
| current += acpi_create_srat_gia_pci((acpi_srat_gia_t *)current, i, pds.pds[i].dev, 1); |
| base = pds.pds[i].base << 16; |
| size = pds.pds[i].size << 16; |
| printk(BIOS_DEBUG, |
| "adding srat MEM affinity domain: %d, base: 0x%x, size: 0x%x\n", i, base, |
| size); |
| current += |
| acpi_create_srat_mem((acpi_srat_mem_t *)current, i, |
| pds.pds[i].base << 16, pds.pds[i].size << 16, 1); |
| } |
| |
| return current; |
| } |
| |
| /* |
| * The current kernel does not use HMAT table. |
| */ |
| unsigned long acpi_fill_hmat(unsigned long current) |
| { |
| uint32_t pd_initiator = 0; |
| uint32_t pd_memory = 0; |
| |
| /* In CXL2.0, CXL memories attached to different sockets could be ganged |
| * to form a single CXL memory region. |
| * For now, we do not consider this case, and assume socket_bitmap has |
| * only one bit set, eg. a CXL memory region is attached to one socket. |
| */ |
| uint8_t j; |
| for (uint8_t i = soc_get_num_cpus(); i < pds.num_pds; i++) { |
| pd_memory = i; |
| /* check socket_bitmap which is type uint8_t */ |
| for (j = 0; j < 8; j++) |
| if ((pds.pds[i].socket_bitmap >> j) == 0) |
| break; |
| pd_initiator = j - 1; |
| printk(BIOS_DEBUG, "HMAT: pd_initiator = %d, pd_memory = %d\n", pd_initiator, |
| pd_memory); |
| current += acpi_create_hmat_mpda((acpi_hmat_mpda_t *)current, pd_initiator, |
| pd_memory); |
| } |
| |
| /* |
| * We created only MPDA structure. In future, we could create |
| * SLLBI structure to describe latency/bandwidth info when such info |
| * is available. |
| */ |
| |
| return current; |
| } |