diff options
Diffstat (limited to 'src/soc/intel/xeon_sp/uncore.c')
| -rw-r--r-- | src/soc/intel/xeon_sp/uncore.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/src/soc/intel/xeon_sp/uncore.c b/src/soc/intel/xeon_sp/uncore.c index 15a9f0ff17..de29dea2b4 100644 --- a/src/soc/intel/xeon_sp/uncore.c +++ b/src/soc/intel/xeon_sp/uncore.c @@ -11,6 +11,8 @@ #include <soc/ramstage.h> #include <soc/util.h> #include <fsp/util.h> +#include <security/intel/txt/txt_platform.h> +#include <soc/pci_devs.h> struct map_entry { uint32_t reg; @@ -88,6 +90,20 @@ static void mc_report_map_entries(struct device *dev, uint64_t *values) } } +static void configure_dpr(struct device *dev) +{ + const uintptr_t cbmem_top_mb = ALIGN_UP((uintptr_t)cbmem_top(), MiB) / MiB; + union dpr_register dpr = { .raw = pci_read_config32(dev, VTD_LTDPR) }; + + /* The DPR lock bit has to be set sufficiently early. It looks like + * it cannot be set anymore after FSP-S. + */ + dpr.lock = 1; + dpr.epm = 1; + dpr.size = dpr.top - cbmem_top_mb; + pci_write_config32(dev, VTD_LTDPR, dpr.raw); +} + /* * Host Memory Map: * @@ -127,6 +143,8 @@ static void mc_report_map_entries(struct device *dev, uint64_t *values) * | MEseg (relocatable) | 32, 64, 128 or 256 MB (0x78000000 - 0x7fffffff, 0x20000) * +--------------------------+ * | Tseg (relocatable) | N x 8MB (0x70000000 - 0x77ffffff, 0x20000) + * +--------------------------+ + * | DPR | * +--------------------------+ cbmem_top * | Reserved - CBMEM | (0x6fffe000 - 0x6fffffff, 0x2000) * +--------------------------+ @@ -203,6 +221,16 @@ static void mc_add_dram_resources(struct device *dev, int *res_count) LOG_MEM_RESOURCE("mmio_tseg", dev, index, base_kb, size_kb); reserved_ram_resource(dev, index++, base_kb, size_kb); + /* Reserve and set up DPR */ + configure_dpr(dev); + union dpr_register dpr = { .raw = pci_read_config32(dev, VTD_LTDPR) }; + if (dpr.size) { + uint32_t dpr_base_k = (dpr.top - dpr.size) << 10; + uint32_t dpr_size_k = dpr.size << 10; + reserved_ram_resource(dev, index++, dpr_base_k, dpr_size_k); + LOG_MEM_RESOURCE("dpr", dev, index, dpr_base_k, dpr_size_k); + } + /* Mark region between TSEG - TOLM (eg. MESEG) as reserved */ if (mc_values[TSEG_LIMIT_REG] < mc_values[TOLM_REG]) { base_kb = ((mc_values[TSEG_LIMIT_REG] + 1) >> 10); @@ -294,3 +322,24 @@ static const struct pci_driver mmapvtd_driver __pci_driver = { .vendor = PCI_VENDOR_ID_INTEL, .devices = mmapvtd_ids }; + +static void vtd_read_resources(struct device *dev) +{ + pci_dev_read_resources(dev); + + configure_dpr(dev); +} + +static struct device_operations vtd_ops = { + .read_resources = vtd_read_resources, + .set_resources = pci_dev_set_resources, + .enable_resources = pci_dev_enable_resources, + .ops_pci = &soc_pci_ops, +}; + +/* VTD devices on other stacks */ +static const struct pci_driver vtd_driver __pci_driver = { + .ops = &vtd_ops, + .vendor = PCI_VENDOR_ID_INTEL, + .device = MMAP_VTD_STACK_CFG_REG_DEVID, +}; |