Re: [PATCH 11/15] platform/x86/amd/pmf: dump policy binary data

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On 9/22/2023 12:50, Shyam Sundar S K wrote:
Sometimes policy binary retrieved from the BIOS maybe incorrect that can
end up in failing to enable the Smart PC solution feature.

Use print_hex_dump_debug() to dump the policy binary in hex, so that we
debug the issues related to the binary even before sending that to TA.

Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@xxxxxxx>
---
  drivers/platform/x86/amd/pmf/tee-if.c | 7 +++++++
  1 file changed, 7 insertions(+)

diff --git a/drivers/platform/x86/amd/pmf/tee-if.c b/drivers/platform/x86/amd/pmf/tee-if.c
index fa37cfab2dc7..3daa122f35d5 100644
--- a/drivers/platform/x86/amd/pmf/tee-if.c
+++ b/drivers/platform/x86/amd/pmf/tee-if.c
@@ -290,6 +290,9 @@ static ssize_t amd_pmf_get_pb_data(struct file *filp, const char __user *buf,
  	if (copy_from_user(dev->policy_buf, buf, dev->policy_sz))
  		return -EFAULT;
+ print_hex_dump_debug("(pb): ", DUMP_PREFIX_OFFSET, 16, 1, dev->policy_buf,
+			     dev->policy_sz, false);
+

Should this one also be guarded by CONFIG_AMD_PMF_DEBUG or no?

  	ret = amd_pmf_start_policy_engine(dev);
  	if (ret)
  		return -EINVAL;
@@ -329,6 +332,10 @@ static int amd_pmf_get_bios_buffer(struct amd_pmf_dev *dev)
  		return -ENOMEM;
memcpy(dev->policy_buf, dev->policy_base, dev->policy_sz);
+#ifdef CONFIG_AMD_PMF_DEBUG
+	print_hex_dump_debug("(pb):  ", DUMP_PREFIX_OFFSET, 16, 1, dev->policy_buf,
+			     dev->policy_sz, false);
+#endif
#ifdef CONFIG_AMD_PMF_DEBUG
  	if (pb_side_load)

It looks like you can combine the two #ifdef from the previous patches.



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