diff mbox series

[v2,02/11] tpm_crb: CTRL_RSP_ADDR is 64-bits wide

Message ID 20230714070931.23476-3-j@getutm.app
State New
Headers show
Series tpm: introduce TPM CRB SysBus device | expand

Commit Message

Joelle van Dyne July 14, 2023, 7:09 a.m. UTC 
The register is actually 64-bits but in order to make this more clear
than the specification, we define two 32-bit registers:
CTRL_RSP_LADDR and CTRL_RSP_HADDR to match the CTRL_CMD_* naming. This
deviates from the specs but is way more clear.

Previously, the only CRB device uses a fixed system address so this
was not an issue. However, once we support SysBus CRB device, the
address can be anywhere in 64-bit space.

Signed-off-by: Joelle van Dyne <j@getutm.app>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
---
 include/hw/acpi/tpm.h      | 3 ++-
 hw/tpm/tpm_crb_common.c    | 3 ++-
 tests/qtest/tpm-crb-test.c | 2 +-
 tests/qtest/tpm-util.c     | 2 +-
 4 files changed, 6 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/include/hw/acpi/tpm.h b/include/hw/acpi/tpm.h
index 579c45f5ba..f60bfe2789 100644
--- a/include/hw/acpi/tpm.h
+++ b/include/hw/acpi/tpm.h
@@ -174,7 +174,8 @@  REG32(CRB_CTRL_CMD_SIZE, 0x58)
 REG32(CRB_CTRL_CMD_LADDR, 0x5C)
 REG32(CRB_CTRL_CMD_HADDR, 0x60)
 REG32(CRB_CTRL_RSP_SIZE, 0x64)
-REG32(CRB_CTRL_RSP_ADDR, 0x68)
+REG32(CRB_CTRL_RSP_LADDR, 0x68)
+REG32(CRB_CTRL_RSP_HADDR, 0x6C)
 REG32(CRB_DATA_BUFFER, 0x80)
 
 #define TPM_CRB_ADDR_BASE           0xFED40000
diff --git a/hw/tpm/tpm_crb_common.c b/hw/tpm/tpm_crb_common.c
index 4c173affb6..228e2d0faf 100644
--- a/hw/tpm/tpm_crb_common.c
+++ b/hw/tpm/tpm_crb_common.c
@@ -199,7 +199,8 @@  void tpm_crb_reset(TPMCRBState *s, uint64_t baseaddr)
     s->regs[R_CRB_CTRL_CMD_LADDR] = (uint32_t)baseaddr;
     s->regs[R_CRB_CTRL_CMD_HADDR] = (uint32_t)(baseaddr >> 32);
     s->regs[R_CRB_CTRL_RSP_SIZE] = CRB_CTRL_CMD_SIZE;
-    s->regs[R_CRB_CTRL_RSP_ADDR] = (uint32_t)baseaddr;
+    s->regs[R_CRB_CTRL_RSP_LADDR] = (uint32_t)baseaddr;
+    s->regs[R_CRB_CTRL_RSP_HADDR] = (uint32_t)(baseaddr >> 32);
 
     s->be_buffer_size = MIN(tpm_backend_get_buffer_size(s->tpmbe),
                             CRB_CTRL_CMD_SIZE);
diff --git a/tests/qtest/tpm-crb-test.c b/tests/qtest/tpm-crb-test.c
index 396ae3f91c..9d30fe8293 100644
--- a/tests/qtest/tpm-crb-test.c
+++ b/tests/qtest/tpm-crb-test.c
@@ -28,7 +28,7 @@  static void tpm_crb_test(const void *data)
     uint32_t csize = readl(TPM_CRB_ADDR_BASE + A_CRB_CTRL_CMD_SIZE);
     uint64_t caddr = readq(TPM_CRB_ADDR_BASE + A_CRB_CTRL_CMD_LADDR);
     uint32_t rsize = readl(TPM_CRB_ADDR_BASE + A_CRB_CTRL_RSP_SIZE);
-    uint64_t raddr = readq(TPM_CRB_ADDR_BASE + A_CRB_CTRL_RSP_ADDR);
+    uint64_t raddr = readq(TPM_CRB_ADDR_BASE + A_CRB_CTRL_RSP_LADDR);
     uint8_t locstate = readb(TPM_CRB_ADDR_BASE + A_CRB_LOC_STATE);
     uint32_t locctrl = readl(TPM_CRB_ADDR_BASE + A_CRB_LOC_CTRL);
     uint32_t locsts = readl(TPM_CRB_ADDR_BASE + A_CRB_LOC_STS);
diff --git a/tests/qtest/tpm-util.c b/tests/qtest/tpm-util.c
index 1c0319e6e7..dd02057fc0 100644
--- a/tests/qtest/tpm-util.c
+++ b/tests/qtest/tpm-util.c
@@ -25,7 +25,7 @@  void tpm_util_crb_transfer(QTestState *s,
                            unsigned char *rsp, size_t rsp_size)
 {
     uint64_t caddr = qtest_readq(s, TPM_CRB_ADDR_BASE + A_CRB_CTRL_CMD_LADDR);
-    uint64_t raddr = qtest_readq(s, TPM_CRB_ADDR_BASE + A_CRB_CTRL_RSP_ADDR);
+    uint64_t raddr = qtest_readq(s, TPM_CRB_ADDR_BASE + A_CRB_CTRL_RSP_LADDR);
 
     qtest_writeb(s, TPM_CRB_ADDR_BASE + A_CRB_LOC_CTRL, 1);