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Message-Id: <20250429221519.1022170-3-stuart.yoder@arm.com> Date: Tue, 29 Apr 2025 17:15:19 -0500 From: Stuart Yoder <stuart.yoder@....com> To: linux-integrity@...r.kernel.org, jarkko@...nel.org, peterhuewe@....de, jgg@...pe.ca, sudeep.holla@....com Cc: linux-kernel@...r.kernel.org Subject: [PATCH 2/2] tpm_crb: ffa_tpm: update comment to include 64-bit calling convention The comment for DIRECT_REQ and DIRECT_RESP only mentioned AArch32 and listed 32-bit function IDs. Update to include 64-bit. Signed-off-by: Stuart Yoder <stuart.yoder@....com> --- drivers/char/tpm/tpm_crb_ffa.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/char/tpm/tpm_crb_ffa.c b/drivers/char/tpm/tpm_crb_ffa.c index 65b01a46d4b88..134747911ba38 100644 --- a/drivers/char/tpm/tpm_crb_ffa.c +++ b/drivers/char/tpm/tpm_crb_ffa.c @@ -38,9 +38,11 @@ * messages. * * All requests with FFA_MSG_SEND_DIRECT_REQ and FFA_MSG_SEND_DIRECT_RESP - * are using the AArch32 SMC calling convention with register usage as - * defined in FF-A specification: - * w0: Function ID (0x8400006F or 0x84000070) + * are using the AArch32 or AArch64 SMC calling convention with register usage + * as defined in FF-A specification: + * w0: Function ID + * -for 32-bit: 0x8400006F or 0x84000070 + * -for 64-bit: 0xC400006F or 0xC4000070 * w1: Source/Destination IDs * w2: Reserved (MBZ) * w3-w7: Implementation defined, free to be used below -- 2.34.1
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