[RFC PATCH 8/8] tpm: Move backend code under the 'backends/' directory

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

TPM subsytem is split into backends (see commit f4ede81eed2)
and frontends (see i.e. 3676bc69b35). Keep the emulated
hardware 'frontends' under hw/tpm/, but move the backends
in the backends/ directory.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
RFC due to a FIXME in tpm_tis_common.c, it uses
TRACE_TPM_UTIL_SHOW_BUFFER which is now generated
by backends/trace-events...
---
 Makefile                               |  2 +-
 {hw/tpm => backends}/tpm_int.h         |  6 ++---
 {hw/tpm => backends}/tpm_ioctl.h       |  0
 {hw/tpm => backends}/tpm_emulator.c    |  0
 {hw/tpm => backends}/tpm_passthrough.c |  0
 {hw/tpm => backends}/tpm_util.c        |  0
 hw/tpm/tpm_tis_common.c                |  1 +
 tests/qtest/tpm-emu.c                  |  2 +-
 MAINTAINERS                            |  2 +-
 backends/Kconfig                       | 14 +++++++++++
 backends/Makefile.objs                 |  3 +++
 backends/trace-events                  | 32 ++++++++++++++++++++++++
 hw/tpm/Kconfig                         | 15 ------------
 hw/tpm/Makefile.objs                   |  3 ---
 hw/tpm/trace-events                    | 34 +-------------------------
 15 files changed, 57 insertions(+), 57 deletions(-)
 rename {hw/tpm => backends}/tpm_int.h (96%)
 rename {hw/tpm => backends}/tpm_ioctl.h (100%)
 rename {hw/tpm => backends}/tpm_emulator.c (100%)
 rename {hw/tpm => backends}/tpm_passthrough.c (100%)
 rename {hw/tpm => backends}/tpm_util.c (100%)
 create mode 100644 backends/Kconfig

diff --git a/Makefile b/Makefile
index d1af126ea1..0ab6e12dd6 100644
--- a/Makefile
+++ b/Makefile
@@ -418,7 +418,7 @@ MINIKCONF_ARGS = \
     CONFIG_LINUX=$(CONFIG_LINUX) \
     CONFIG_PVRDMA=$(CONFIG_PVRDMA)
 
-MINIKCONF_INPUTS = $(SRC_PATH)/Kconfig.host $(SRC_PATH)/hw/Kconfig
+MINIKCONF_INPUTS = $(SRC_PATH)/Kconfig.host $(SRC_PATH)/backends/Kconfig $(SRC_PATH)/hw/Kconfig
 MINIKCONF_DEPS = $(MINIKCONF_INPUTS) $(wildcard $(SRC_PATH)/hw/*/Kconfig)
 MINIKCONF = $(PYTHON) $(SRC_PATH)/scripts/minikconf.py \
 
diff --git a/hw/tpm/tpm_int.h b/backends/tpm_int.h
similarity index 96%
rename from hw/tpm/tpm_int.h
rename to backends/tpm_int.h
index 9f72879d89..ba6109306e 100644
--- a/hw/tpm/tpm_int.h
+++ b/backends/tpm_int.h
@@ -9,8 +9,8 @@
  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  * See the COPYING file in the top-level directory.
  */
-#ifndef TPM_TPM_INT_H
-#define TPM_TPM_INT_H
+#ifndef BACKENDS_TPM_INT_H
+#define BACKENDS_TPM_INT_H
 
 #include "qemu/option.h"
 #include "sysemu/tpm.h"
@@ -85,4 +85,4 @@ typedef struct TPMSizedBuffer {
 
 void tpm_sized_buffer_reset(TPMSizedBuffer *tsb);
 
-#endif /* TPM_TPM_INT_H */
+#endif /* BACKENDS_TPM_INT_H */
diff --git a/hw/tpm/tpm_ioctl.h b/backends/tpm_ioctl.h
similarity index 100%
rename from hw/tpm/tpm_ioctl.h
rename to backends/tpm_ioctl.h
diff --git a/hw/tpm/tpm_emulator.c b/backends/tpm_emulator.c
similarity index 100%
rename from hw/tpm/tpm_emulator.c
rename to backends/tpm_emulator.c
diff --git a/hw/tpm/tpm_passthrough.c b/backends/tpm_passthrough.c
similarity index 100%
rename from hw/tpm/tpm_passthrough.c
rename to backends/tpm_passthrough.c
diff --git a/hw/tpm/tpm_util.c b/backends/tpm_util.c
similarity index 100%
rename from hw/tpm/tpm_util.c
rename to backends/tpm_util.c
diff --git a/hw/tpm/tpm_tis_common.c b/hw/tpm/tpm_tis_common.c
index 64206a6a3b..70ca5bc7a9 100644
--- a/hw/tpm/tpm_tis_common.c
+++ b/hw/tpm/tpm_tis_common.c
@@ -36,6 +36,7 @@
 #include "sysemu/tpm_util.h"
 #include "tpm_ppi.h"
 #include "trace.h"
+#include "../backends/trace.h" /* FIXME TRACE_TPM_UTIL_SHOW_BUFFER */
 
 #include "tpm_tis.h"
 
diff --git a/tests/qtest/tpm-emu.c b/tests/qtest/tpm-emu.c
index c43ac4aef8..fd6a2a9aff 100644
--- a/tests/qtest/tpm-emu.c
+++ b/tests/qtest/tpm-emu.c
@@ -13,7 +13,7 @@
 #include "qemu/osdep.h"
 #include <glib/gstdio.h>
 
-#include "hw/tpm/tpm_ioctl.h"
+#include "backends/tpm_ioctl.h"
 #include "io/channel-socket.h"
 #include "qapi/error.h"
 #include "tpm-emu.h"
diff --git a/MAINTAINERS b/MAINTAINERS
index 3abe3faa4e..3a9425e3df 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2385,7 +2385,7 @@ F: hw/tpm/*
 F: include/hw/acpi/tpm.h
 F: include/sysemu/tpm*
 F: qapi/tpm.json
-F: backends/tpm.c
+F: backends/tpm*.c
 F: tests/qtest/*tpm*
 T: git https://github.com/stefanberger/qemu-tpm.git tpm-next
 
diff --git a/backends/Kconfig b/backends/Kconfig
new file mode 100644
index 0000000000..4ac943957a
--- /dev/null
+++ b/backends/Kconfig
@@ -0,0 +1,14 @@
+config TPMDEV
+    bool
+    depends on TPM
+
+config TPM_PASSTHROUGH
+    bool
+    default y
+    # FIXME: should check for x86 host as well
+    depends on TPMDEV && LINUX
+
+config TPM_EMULATOR
+    bool
+    default y
+    depends on TPMDEV
diff --git a/backends/Makefile.objs b/backends/Makefile.objs
index 28a847cd57..e3f244808e 100644
--- a/backends/Makefile.objs
+++ b/backends/Makefile.objs
@@ -2,6 +2,9 @@ common-obj-y += rng.o rng-egd.o rng-builtin.o
 common-obj-$(CONFIG_POSIX) += rng-random.o
 
 common-obj-$(CONFIG_TPM) += tpm.o
+common-obj-$(CONFIG_TPM) += tpm_util.o
+common-obj-$(CONFIG_TPM_PASSTHROUGH) += tpm_passthrough.o
+common-obj-$(CONFIG_TPM_EMULATOR) += tpm_emulator.o
 
 common-obj-y += hostmem.o hostmem-ram.o
 common-obj-$(CONFIG_POSIX) += hostmem-file.o
diff --git a/backends/trace-events b/backends/trace-events
index 59058f7630..e6f7b3215b 100644
--- a/backends/trace-events
+++ b/backends/trace-events
@@ -5,3 +5,35 @@ dbus_vmstate_pre_save(void)
 dbus_vmstate_post_load(int version_id) "version_id: %d"
 dbus_vmstate_loading(const char *id) "id: %s"
 dbus_vmstate_saving(const char *id) "id: %s"
+
+# tpm_passthrough.c
+tpm_passthrough_handle_request(void *cmd) "processing command %p"
+tpm_passthrough_reset(void) "reset"
+
+# tpm_emulator.c
+tpm_emulator_set_locality(uint8_t locty) "setting locality to %d"
+tpm_emulator_handle_request(void) "processing TPM command"
+tpm_emulator_probe_caps(uint64_t caps) "capabilities: 0x%"PRIx64
+tpm_emulator_set_buffer_size(uint32_t buffersize, uint32_t minsize, uint32_t maxsize) "buffer size: %u, min: %u, max: %u"
+tpm_emulator_startup_tpm_resume(bool is_resume, size_t buffersize) "is_resume: %d, buffer size: %zu"
+tpm_emulator_get_tpm_established_flag(uint8_t flag) "got established flag: %d"
+tpm_emulator_cancel_cmd_not_supt(void) "Backend does not support CANCEL_TPM_CMD"
+tpm_emulator_handle_device_opts_tpm12(void) "TPM Version 1.2"
+tpm_emulator_handle_device_opts_tpm2(void) "TPM Version 2"
+tpm_emulator_handle_device_opts_unspec(void) "TPM Version Unspecified"
+tpm_emulator_handle_device_opts_startup_error(void) "Startup error"
+tpm_emulator_get_state_blob(uint8_t type, uint32_t size, uint32_t flags) "got state blob type %d, %u bytes, flags 0x%08x"
+tpm_emulator_set_state_blob(uint8_t type, uint32_t size, uint32_t flags) "set state blob type %d, %u bytes, flags 0x%08x"
+tpm_emulator_set_state_blobs(void) "setting state blobs"
+tpm_emulator_set_state_blobs_error(const char *msg) "error while setting state blobs: %s"
+tpm_emulator_set_state_blobs_done(void) "Done setting state blobs"
+tpm_emulator_pre_save(void) ""
+tpm_emulator_inst_init(void) ""
+
+# tpm_util.c
+tpm_util_get_buffer_size_hdr_len(uint32_t len, size_t expected) "tpm_resp->hdr.len = %u, expected = %zu"
+tpm_util_get_buffer_size_len(uint32_t len, size_t expected) "tpm_resp->len = %u, expected = %zu"
+tpm_util_get_buffer_size_hdr_len2(uint32_t len, size_t expected) "tpm2_resp->hdr.len = %u, expected = %zu"
+tpm_util_get_buffer_size_len2(uint32_t len, size_t expected) "tpm2_resp->len = %u, expected = %zu"
+tpm_util_get_buffer_size(size_t len) "buffersize of device: %zu"
+tpm_util_show_buffer(const char *direction, size_t len, const char *buf) "direction: %s len: %zu\n%s"
diff --git a/hw/tpm/Kconfig b/hw/tpm/Kconfig
index 4794e7fe28..3a9fd73a4b 100644
--- a/hw/tpm/Kconfig
+++ b/hw/tpm/Kconfig
@@ -1,7 +1,3 @@
-config TPMDEV
-    bool
-    depends on TPM
-
 config TPM_TIS_ISA
     bool
     depends on TPM && ISA_BUS
@@ -22,17 +18,6 @@ config TPM_CRB
     depends on TPM && PC
     select TPMDEV
 
-config TPM_PASSTHROUGH
-    bool
-    default y
-    # FIXME: should check for x86 host as well
-    depends on TPMDEV && LINUX
-
-config TPM_EMULATOR
-    bool
-    default y
-    depends on TPMDEV
-
 config TPM_SPAPR
     bool
     default y
diff --git a/hw/tpm/Makefile.objs b/hw/tpm/Makefile.objs
index f1ec4beb95..6fc05be67c 100644
--- a/hw/tpm/Makefile.objs
+++ b/hw/tpm/Makefile.objs
@@ -1,9 +1,6 @@
-common-obj-$(CONFIG_TPM) += tpm_util.o
 obj-$(call lor,$(CONFIG_TPM_TIS),$(CONFIG_TPM_CRB)) += tpm_ppi.o
 common-obj-$(CONFIG_TPM_TIS_ISA) += tpm_tis_isa.o
 common-obj-$(CONFIG_TPM_TIS_SYSBUS) += tpm_tis_sysbus.o
 common-obj-$(CONFIG_TPM_TIS) += tpm_tis_common.o
 common-obj-$(CONFIG_TPM_CRB) += tpm_crb.o
-common-obj-$(CONFIG_TPM_PASSTHROUGH) += tpm_passthrough.o
-common-obj-$(CONFIG_TPM_EMULATOR) += tpm_emulator.o
 obj-$(CONFIG_TPM_SPAPR) += tpm_spapr.o
diff --git a/hw/tpm/trace-events b/hw/tpm/trace-events
index 439e514787..de9bf1e01b 100644
--- a/hw/tpm/trace-events
+++ b/hw/tpm/trace-events
@@ -4,38 +4,6 @@
 tpm_crb_mmio_read(uint64_t addr, unsigned size, uint32_t val) "CRB read 0x%016" PRIx64 " len:%u val: 0x%" PRIx32
 tpm_crb_mmio_write(uint64_t addr, unsigned size, uint32_t val) "CRB write 0x%016" PRIx64 " len:%u val: 0x%" PRIx32
 
-# tpm_passthrough.c
-tpm_passthrough_handle_request(void *cmd) "processing command %p"
-tpm_passthrough_reset(void) "reset"
-
-# tpm_util.c
-tpm_util_get_buffer_size_hdr_len(uint32_t len, size_t expected) "tpm_resp->hdr.len = %u, expected = %zu"
-tpm_util_get_buffer_size_len(uint32_t len, size_t expected) "tpm_resp->len = %u, expected = %zu"
-tpm_util_get_buffer_size_hdr_len2(uint32_t len, size_t expected) "tpm2_resp->hdr.len = %u, expected = %zu"
-tpm_util_get_buffer_size_len2(uint32_t len, size_t expected) "tpm2_resp->len = %u, expected = %zu"
-tpm_util_get_buffer_size(size_t len) "buffersize of device: %zu"
-tpm_util_show_buffer(const char *direction, size_t len, const char *buf) "direction: %s len: %zu\n%s"
-
-# tpm_emulator.c
-tpm_emulator_set_locality(uint8_t locty) "setting locality to %d"
-tpm_emulator_handle_request(void) "processing TPM command"
-tpm_emulator_probe_caps(uint64_t caps) "capabilities: 0x%"PRIx64
-tpm_emulator_set_buffer_size(uint32_t buffersize, uint32_t minsize, uint32_t maxsize) "buffer size: %u, min: %u, max: %u"
-tpm_emulator_startup_tpm_resume(bool is_resume, size_t buffersize) "is_resume: %d, buffer size: %zu"
-tpm_emulator_get_tpm_established_flag(uint8_t flag) "got established flag: %d"
-tpm_emulator_cancel_cmd_not_supt(void) "Backend does not support CANCEL_TPM_CMD"
-tpm_emulator_handle_device_opts_tpm12(void) "TPM Version 1.2"
-tpm_emulator_handle_device_opts_tpm2(void) "TPM Version 2"
-tpm_emulator_handle_device_opts_unspec(void) "TPM Version Unspecified"
-tpm_emulator_handle_device_opts_startup_error(void) "Startup error"
-tpm_emulator_get_state_blob(uint8_t type, uint32_t size, uint32_t flags) "got state blob type %d, %u bytes, flags 0x%08x"
-tpm_emulator_set_state_blob(uint8_t type, uint32_t size, uint32_t flags) "set state blob type %d, %u bytes, flags 0x%08x"
-tpm_emulator_set_state_blobs(void) "setting state blobs"
-tpm_emulator_set_state_blobs_error(const char *msg) "error while setting state blobs: %s"
-tpm_emulator_set_state_blobs_done(void) "Done setting state blobs"
-tpm_emulator_pre_save(void) ""
-tpm_emulator_inst_init(void) ""
-
 # tpm_tis.c
 tpm_tis_raise_irq(uint32_t irqmask) "Raising IRQ for flag 0x%08x"
 tpm_tis_new_active_locality(uint8_t locty) "Active locality is now %d"
@@ -56,7 +24,7 @@ tpm_tis_pre_save(uint8_t locty, uint32_t rw_offset) "locty: %d, rw_offset = %u"
 # tpm_ppi.c
 tpm_ppi_memset(uint8_t *ptr, size_t size) "memset: %p %zu"
 
-# hw/tpm/tpm_spapr.c
+# tpm_spapr.c
 tpm_spapr_show_buffer(const char *direction, size_t len, const char *buf) "direction: %s len: %zu\n%s"
 tpm_spapr_do_crq(uint8_t raw1, uint8_t raw2) "1st 2 bytes in CRQ: 0x%02x 0x%02x"
 tpm_spapr_do_crq_crq_result(void) "SPAPR_VTPM_INIT_CRQ_RESULT"
-- 
2.21.3