From: Arun Menon <armenon@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: linux-integrity@vger.kernel.org, Jason Gunthorpe <jgg@ziepe.ca>,
Jarkko Sakkinen <jarkko@kernel.org>,
Peter Huewe <peterhuewe@gmx.de>, Arun Menon <armenon@redhat.com>
Subject: [RFC 4/4] tpm: Increase TPM_BUFSIZE to 64kB for chunking support
Date: Tue, 24 Mar 2026 12:48:03 +0530 [thread overview]
Message-ID: <20260324071803.324774-5-armenon@redhat.com> (raw)
In-Reply-To: <20260324071803.324774-1-armenon@redhat.com>
- In tpm_common_write() the size of the command is checked against
TPM_BUFSIZE. We therefore need to increase the TPM_BUFSIZE to allow
support for larger commands.
Signed-off-by: Arun Menon <armenon@redhat.com>
---
drivers/char/tpm/tpm.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index 87d68ddf270a7..a6933eb075296 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -33,7 +33,7 @@
#endif
#define TPM_MINOR 224 /* officially assigned */
-#define TPM_BUFSIZE 4096
+#define TPM_BUFSIZE 65536
#define TPM_NUM_DEVICES 65536
#define TPM_RETRY 50
--
2.53.0
next prev parent reply other threads:[~2026-03-24 7:18 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-24 7:17 [RFC 0/4] tpm_crb: Add command and response buffer chunking support Arun Menon
2026-03-24 7:18 ` [RFC 1/4] tpm_crb: Add definition of TPM CRB chunking fields Arun Menon
2026-03-24 7:18 ` [RFC 2/4] tpm_crb: Add new wrapper function to invoke start method Arun Menon
2026-03-24 10:42 ` Jarkko Sakkinen
2026-03-24 12:43 ` Arun Menon
2026-04-08 8:36 ` Jarkko Sakkinen
2026-04-23 10:48 ` Arun Menon
2026-03-24 7:18 ` [RFC 3/4] tpm_crb: Implement command and response chunking logic Arun Menon
2026-03-24 10:45 ` Jarkko Sakkinen
2026-03-24 12:46 ` Arun Menon
2026-03-24 7:18 ` Arun Menon [this message]
2026-03-24 10:41 ` [RFC 0/4] tpm_crb: Add command and response buffer chunking support Jarkko Sakkinen
2026-03-24 12:41 ` Arun Menon
2026-04-08 8:34 ` Jarkko Sakkinen
2026-04-23 10:43 ` Arun Menon
2026-04-23 12:50 ` Jarkko Sakkinen
2026-04-24 20:54 ` Stefan Berger
2026-04-25 14:21 ` Jarkko Sakkinen
2026-04-27 10:28 ` Arun Menon
-- strict thread matches above, loose matches on Subject: below --
2026-03-28 0:35 [RFC 4/4] tpm: Increase TPM_BUFSIZE to 64kB for " kernel test robot
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