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@@ -7,6 +7,7 @@
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*/
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#include <common.h>
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+#include <bloblist.h>
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#include <cpu.h>
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#include <dm.h>
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#include <log.h>
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@@ -214,6 +215,64 @@ static void acpi_create_mcfg(struct acpi_mcfg *mcfg)
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header->checksum = table_compute_checksum((void *)mcfg, header->length);
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}
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+static int get_tpm2_log(void **ptrp, int *sizep)
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+{
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+ const int tpm2_default_log_len = 0x10000;
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+ int size;
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+ int ret;
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+
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+ *sizep = 0;
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+ size = tpm2_default_log_len;
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+ ret = bloblist_ensure_size_ret(BLOBLISTT_TPM2_TCG_LOG, &size, ptrp);
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+ if (ret)
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+ return log_msg_ret("blob", ret);
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+ *sizep = size;
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+
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+ return 0;
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+}
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+
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+static int acpi_create_tpm2(struct acpi_tpm2 *tpm2)
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+{
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+ struct acpi_table_header *header = &tpm2->header;
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+ int tpm2_log_len;
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+ void *lasa;
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+ int ret;
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+
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+ memset((void *)tpm2, 0, sizeof(struct acpi_tpm2));
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+
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+ /*
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+ * Some payloads like SeaBIOS depend on log area to use TPM2.
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+ * Get the memory size and address of TPM2 log area or initialize it.
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+ */
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+ ret = get_tpm2_log(&lasa, &tpm2_log_len);
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+ if (ret)
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+ return ret;
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+
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+ /* Fill out header fields. */
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+ acpi_fill_header(header, "TPM2");
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+ memcpy(header->aslc_id, ASLC_ID, 4);
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+
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+ header->length = sizeof(struct acpi_tpm2);
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+ header->revision = acpi_get_table_revision(ACPITAB_TPM2);
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+
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+ /* Hard to detect for coreboot. Just set it to 0 */
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+ tpm2->platform_class = 0;
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+
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+ /* Must be set to 0 for FIFO-interface support */
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+ tpm2->control_area = 0;
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+ tpm2->start_method = 6;
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+ memset(tpm2->msp, 0, sizeof(tpm2->msp));
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+
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+ /* Fill the log area size and start address fields. */
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+ tpm2->laml = tpm2_log_len;
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+ tpm2->lasa = (uintptr_t)lasa;
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+
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+ /* Calculate checksum. */
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+ header->checksum = table_compute_checksum((void *)tpm2, header->length);
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+
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+ return 0;
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+}
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+
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__weak u32 acpi_fill_csrt(u32 current)
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{
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return 0;
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@@ -499,6 +558,21 @@ ulong write_acpi_tables(ulong start_addr)
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acpi_inc_align(ctx, mcfg->header.length);
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acpi_add_table(ctx, mcfg);
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+ if (IS_ENABLED(CONFIG_TPM_V2)) {
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+ struct acpi_tpm2 *tpm2;
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+ int ret;
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+
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+ debug("ACPI: * TPM2\n");
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+ tpm2 = (struct acpi_tpm2 *)ctx->current;
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+ ret = acpi_create_tpm2(tpm2);
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+ if (!ret) {
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+ acpi_inc_align(ctx, tpm2->header.length);
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+ acpi_add_table(ctx, tpm2);
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+ } else {
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+ log_warning("TPM2 table creation failed\n");
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+ }
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+ }
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+
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debug("ACPI: * MADT\n");
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madt = ctx->current;
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acpi_create_madt(madt);
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