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Swtpm may release the lock once the last one of its state blobs has been migrated out. In case of VM migration failure QEMU now needs to notify swtpm that it should again take the lock, which it can otherwise only do once it has received the first TPM command from the VM. Only try to send the lock command if swtpm supports it. It will not have released the lock (and support shared storage setups) if it doesn't support the locking command since the functionality of releasing the lock upon state blob reception and the lock command were added to swtpm 'together'. If QEMU sends the lock command and the storage has already been locked no error is reported. If swtpm does not receive the lock command (from older version of QEMU), it will lock the storage once the first TPM command has been received. So sending the lock command is an optimization. Signed-off-by: Stefan Berger <stefanb@linux.ibm.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-id: 20220912174741.1542330-3-stefanb@linux.ibm.com
36 lines
2.3 KiB
Plaintext
36 lines
2.3 KiB
Plaintext
# See docs/devel/tracing.rst for syntax documentation.
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# tpm_passthrough.c
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tpm_passthrough_handle_request(void *cmd) "processing command %p"
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tpm_passthrough_reset(void) "reset"
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# tpm_util.c
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tpm_util_get_buffer_size_hdr_len(uint32_t len, size_t expected) "tpm_resp->hdr.len = %u, expected = %zu"
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tpm_util_get_buffer_size_len(uint32_t len, size_t expected) "tpm_resp->len = %u, expected = %zu"
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tpm_util_get_buffer_size_hdr_len2(uint32_t len, size_t expected) "tpm2_resp->hdr.len = %u, expected = %zu"
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tpm_util_get_buffer_size_len2(uint32_t len, size_t expected) "tpm2_resp->len = %u, expected = %zu"
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tpm_util_get_buffer_size(size_t len) "buffersize of device: %zu"
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tpm_util_show_buffer(const char *direction, size_t len, const char *buf) "direction: %s len: %zu\n%s"
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# tpm_emulator.c
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tpm_emulator_set_locality(uint8_t locty) "setting locality to %d"
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tpm_emulator_handle_request(void) "processing TPM command"
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tpm_emulator_probe_caps(uint64_t caps) "capabilities: 0x%"PRIx64
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tpm_emulator_set_buffer_size(uint32_t buffersize, uint32_t minsize, uint32_t maxsize) "buffer size: %u, min: %u, max: %u"
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tpm_emulator_startup_tpm_resume(bool is_resume, size_t buffersize) "is_resume: %d, buffer size: %zu"
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tpm_emulator_get_tpm_established_flag(uint8_t flag) "got established flag: %d"
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tpm_emulator_cancel_cmd_not_supt(void) "Backend does not support CANCEL_TPM_CMD"
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tpm_emulator_lock_storage_cmd_not_supt(void) "Backend does not support LOCK_STORAGE"
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tpm_emulator_vm_state_change(int running, int state) "state change to running %d state %d"
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tpm_emulator_handle_device_opts_tpm12(void) "TPM Version 1.2"
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tpm_emulator_handle_device_opts_tpm2(void) "TPM Version 2"
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tpm_emulator_handle_device_opts_unspec(void) "TPM Version Unspecified"
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tpm_emulator_handle_device_opts_startup_error(void) "Startup error"
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tpm_emulator_get_state_blob(uint8_t type, uint32_t size, uint32_t flags) "got state blob type %d, %u bytes, flags 0x%08x"
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tpm_emulator_set_state_blob(uint8_t type, uint32_t size, uint32_t flags) "set state blob type %d, %u bytes, flags 0x%08x"
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tpm_emulator_set_state_blobs(void) "setting state blobs"
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tpm_emulator_set_state_blobs_error(const char *msg) "error while setting state blobs: %s"
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tpm_emulator_set_state_blobs_done(void) "Done setting state blobs"
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tpm_emulator_pre_save(void) ""
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tpm_emulator_inst_init(void) ""
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