Re: [PATCH v2 5/6] tpm: PCR allocate during PCR extend to disable the unsupported algorithms

On Fri, 17 Jan 2025 at 18:41, Raymond Mao raymond.mao@linaro.org wrote:

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

changes in v2

• None.

lib/tpm-v2.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/tpm-v2.c b/lib/tpm-v2.c index 0e497b2c2a..4995ddc9af 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:
  

-- 2.25.1

Reviewed-by: Ilias Apalodimas ilias.apalodimas@linaro.org