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[Qemu-devel] [PATCH v8 3/5] acpi: add fw_cfg file for TPM and PPI virtua
From: |
Marc-André Lureau |
Subject: |
[Qemu-devel] [PATCH v8 3/5] acpi: add fw_cfg file for TPM and PPI virtual memory device |
Date: |
Mon, 16 Jul 2018 14:59:46 +0200 |
From: Stefan Berger <address@hidden>
To avoid having to hard code the base address of the PPI virtual
memory device we introduce a fw_cfg file etc/tpm/config that holds the
base address of the PPI device, the version of the PPI interface and
the version of the attached TPM.
Signed-off-by: Stefan Berger <address@hidden>
[ Marc-André: renamed to etc/tpm/config, made it static, document it ]
Signed-off-by: Marc-André Lureau <address@hidden>
---
include/hw/acpi/tpm.h | 3 +++
hw/i386/acpi-build.c | 19 +++++++++++++++++++
docs/specs/tpm.txt | 20 ++++++++++++++++++++
3 files changed, 42 insertions(+)
diff --git a/include/hw/acpi/tpm.h b/include/hw/acpi/tpm.h
index b8796df916..a6109a97fc 100644
--- a/include/hw/acpi/tpm.h
+++ b/include/hw/acpi/tpm.h
@@ -194,4 +194,7 @@ REG32(CRB_DATA_BUFFER, 0x80)
#define TPM_PPI_ADDR_SIZE 0x400
#define TPM_PPI_ADDR_BASE 0xFED45000
+#define TPM_PPI_VERSION_NONE 0
+#define TPM_PPI_VERSION_1_30 1
+
#endif /* HW_ACPI_TPM_H */
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index 9e8350c55d..b19575681b 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -119,6 +119,12 @@ typedef struct AcpiBuildPciBusHotplugState {
bool pcihp_bridge_en;
} AcpiBuildPciBusHotplugState;
+typedef struct FWCfgTPMConfig {
+ uint32_t tpmppi_address;
+ uint8_t tpm_version;
+ uint8_t tpmppi_version;
+} QEMU_PACKED FWCfgTPMConfig;
+
static void init_common_fadt_data(Object *o, AcpiFadtData *data)
{
uint32_t io = object_property_get_uint(o, ACPI_PM_PROP_PM_IO_BASE, NULL);
@@ -2873,6 +2879,8 @@ void acpi_setup(void)
AcpiBuildTables tables;
AcpiBuildState *build_state;
Object *vmgenid_dev;
+ TPMIf *tpm;
+ static FWCfgTPMConfig tpm_config;
if (!pcms->fw_cfg) {
ACPI_BUILD_DPRINTF("No fw cfg. Bailing out.\n");
@@ -2907,6 +2915,17 @@ void acpi_setup(void)
fw_cfg_add_file(pcms->fw_cfg, ACPI_BUILD_TPMLOG_FILE,
tables.tcpalog->data, acpi_data_len(tables.tcpalog));
+ tpm = tpm_find();
+ if (tpm && object_property_get_bool(OBJECT(tpm), "ppi", &error_abort)) {
+ tpm_config = (FWCfgTPMConfig) {
+ .tpmppi_address = cpu_to_le32(TPM_PPI_ADDR_BASE),
+ .tpm_version = tpm_get_version(tpm_find()),
+ .tpmppi_version = TPM_PPI_VERSION_NONE
+ };
+ fw_cfg_add_file(pcms->fw_cfg, "etc/tpm/config",
+ &tpm_config, sizeof tpm_config);
+ }
+
vmgenid_dev = find_vmgenid_dev();
if (vmgenid_dev) {
vmgenid_add_fw_cfg(VMGENID(vmgenid_dev), pcms->fw_cfg,
diff --git a/docs/specs/tpm.txt b/docs/specs/tpm.txt
index 0e9bbebe1d..de3f8bda56 100644
--- a/docs/specs/tpm.txt
+++ b/docs/specs/tpm.txt
@@ -20,6 +20,26 @@ QEMU files related to TPM TIS interface:
- hw/tpm/tpm_tis.h
+= fw_cfg interface =
+
+The bios/firmware may use the "etc/tpm/config" fw_cfg entry for
+configuring the guest appropriately.
+
+The entry of 6 bytes has the following content, in little-endian:
+
+ #define TPM_VERSION_UNSPEC 0
+ #define TPM_VERSION_1_2 1
+ #define TPM_VERSION_2_0 2
+
+ #define TPM_PPI_VERSION_NONE 0
+ #define TPM_PPI_VERSION_1_30 1
+
+ struct FWCfgTPMConfig {
+ uint32_t tpmppi_address; /* PPI memory location */
+ uint8_t tpm_version; /* TPM version */
+ uint8_t tpmppi_version; /* PPI version */
+ };
+
= ACPI Interface =
The TPM device is defined with ACPI ID "PNP0C31". QEMU builds a SSDT and passes
--
2.18.0.129.ge3331758f1
- Re: [Qemu-devel] [PATCH v8 2/5] tpm: implement virtual memory device for TPM PPI, (continued)
Re: [Qemu-devel] [PATCH v8 2/5] tpm: implement virtual memory device for TPM PPI, Igor Mammedov, 2018/07/17
Re: [Qemu-devel] [PATCH v8 2/5] tpm: implement virtual memory device for TPM PPI, Igor Mammedov, 2018/07/17
[Qemu-devel] [PATCH v8 4/5] acpi: build TPM Physical Presence interface, Marc-André Lureau, 2018/07/16
[Qemu-devel] [PATCH v8 3/5] acpi: add fw_cfg file for TPM and PPI virtual memory device,
Marc-André Lureau <=
[Qemu-devel] [PATCH v8 5/5] PoC: tpm: add ACPI memory clear interface, Marc-André Lureau, 2018/07/16
Re: [Qemu-devel] [PATCH v8 0/5] Add support for TPM Physical Presence interface, Michael S. Tsirkin, 2018/07/16