tpm_crb: CTRL_RSP_ADDR is 64-bits wide

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>
Message-Id: <20231114020927.62315-3-j@getutm.app>

hw/tpm/tpm_crb_common.c

@@ -197,7 +197,8 @@ 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);

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

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);

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);