From: Raymond Mao <raymond.mao@linaro.org>
Date: Mon, 27 Jan 2025 14:58:50 +0000 (-0800)
Subject: tpm: PCR allocate during PCR extend to disable the unsupported algorithms
X-Git-Tag: v2025.04-rc2~49^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e7e166dabf129aae1fc57fe637ffc37d022ea45a;p=pandora-u-boot.git

tpm: PCR allocate during PCR extend to disable the unsupported algorithms

During PCR extend process, if any unsupported algorithms are active,
try to use PCR allocate to inactivate them.

Signed-off-by: Raymond Mao <raymond.mao@linaro.org>
Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
---

diff --git a/lib/tpm-v2.c b/lib/tpm-v2.c
index aa02a9e9611..9ca7933c094 100644
--- a/lib/tpm-v2.c
+++ b/lib/tpm-v2.c
@@ -344,7 +344,10 @@ u32 tpm2_pcr_extend(struct udevice *dev, u32 index, u32 algorithm,
 
 	if (!tpm2_check_active_banks(dev)) {
 		log_err("Cannot extend PCRs if all the TPM enabled algorithms are not supported\n");
-		return -EINVAL;
+
+		ret = tpm2_pcr_allocate(dev, 0);
+		if (ret)
+			return -EINVAL;
 	}
 	/*
 	 * Fill the command structure starting from the first buffer: