[Xen-devel] [PATCH 02/13] stubdom/vtpm: correct the buffer size returned by TPM_CAP_PROP_INPUT_BUFFER

[Daniel De Graaf <dgdegra@xxxxxxxxxxxxx>]

The vtpm2 ABI supports packets of up to 4088 bytes by default; expose
this property though the TPM's interface so clients do not attempt to
send larger packets.

Signed-off-by: Daniel De Graaf <dgdegra@xxxxxxxxxxxxx>
---
 stubdom/Makefile           |  1 +
 stubdom/vtpm-bufsize.patch | 13 +++++++++++++
 2 files changed, 14 insertions(+)
 create mode 100644 stubdom/vtpm-bufsize.patch

diff --git a/stubdom/Makefile b/stubdom/Makefile
index 64ee6e2..d8316b3 100644
--- a/stubdom/Makefile
+++ b/stubdom/Makefile
@@ -208,6 +208,7 @@ tpm_emulator-$(XEN_TARGET_ARCH): 
tpm_emulator-$(TPMEMU_VERSION).tar.gz
        tar xzf $<
        mv tpm_emulator-$(TPMEMU_VERSION) $@
        patch -d $@ -p1 < tpmemu-$(TPMEMU_VERSION).patch;
+       patch -d $@ -p1 < vtpm-bufsize.patch
        mkdir $@/build
        cd $@/build; CC=${CC} $(CMAKE) .. -DCMAKE_C_FLAGS:STRING="-std=c99 
-DTPM_NO_EXTERN $(TARGET_CPPFLAGS) $(TARGET_CFLAGS) 
-Wno-declaration-after-statement"
        touch $@
diff --git a/stubdom/vtpm-bufsize.patch b/stubdom/vtpm-bufsize.patch
new file mode 100644
index 0000000..9c9304c
--- /dev/null
+++ b/stubdom/vtpm-bufsize.patch
@@ -0,0 +1,13 @@
+diff --git a/config.h.in b/config.h.in
+index d16a997..8088a2a 100644
+--- a/config.h.in
++++ b/config.h.in
+@@ -27,7 +27,7 @@
+ #define TPM_STORAGE_NAME "${TPM_STORAGE_NAME}"
+ #define TPM_DEVICE_NAME  "${TPM_DEVICE_NAME}"
+ #define TPM_LOG_FILE     "${TPM_LOG_FILE}"
+-#define TPM_CMD_BUF_SIZE 4096
++#define TPM_CMD_BUF_SIZE 4088
+ 
+ #endif /* _CONFIG_H_ */
+ 
-- 
1.8.1


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