[PATCH v3 11/16] platform/x86/amd/pmf: dump policy binary data
From: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Date: 2023-10-10 13:01:39
Also in:
amd-gfx, dri-devel, platform-driver-x86
Subsystem:
amd pmf driver, the rest, x86 platform drivers · Maintainers:
Shyam Sundar S K, Linus Torvalds, Hans de Goede, Ilpo Järvinen
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@amd.com> --- drivers/platform/x86/amd/pmf/tee-if.c | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/drivers/platform/x86/amd/pmf/tee-if.c b/drivers/platform/x86/amd/pmf/tee-if.c
index 994daf945795..e4386f503ad0 100644
--- a/drivers/platform/x86/amd/pmf/tee-if.c
+++ b/drivers/platform/x86/amd/pmf/tee-if.c@@ -275,6 +275,12 @@ static int amd_pmf_start_policy_engine(struct amd_pmf_dev *dev) } #ifdef CONFIG_AMD_PMF_DEBUG +static void amd_pmf_hex_dump_pb(struct amd_pmf_dev *dev) +{ + print_hex_dump_debug("(pb): ", DUMP_PREFIX_OFFSET, 16, 1, dev->policy_buf, + dev->policy_sz, false); +} + static ssize_t amd_pmf_get_pb_data(struct file *filp, const char __user *buf, size_t length, loff_t *pos) {
@@ -289,6 +295,7 @@ 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; + amd_pmf_hex_dump_pb(dev); ret = amd_pmf_start_policy_engine(dev); if (ret) return -EINVAL;
@@ -327,6 +334,7 @@ static int amd_pmf_open_pb(struct amd_pmf_dev *dev, struct dentry *debugfs_root) } static void amd_pmf_remove_pb(struct amd_pmf_dev *dev) {} +static void amd_pmf_hex_dump_pb(struct amd_pmf_dev *dev) {} #endif static int amd_pmf_get_bios_buffer(struct amd_pmf_dev *dev)
@@ -341,6 +349,7 @@ static int amd_pmf_get_bios_buffer(struct amd_pmf_dev *dev) memcpy(dev->policy_buf, dev->policy_base, dev->policy_sz); + amd_pmf_hex_dump_pb(dev); if (pb_side_load) amd_pmf_open_pb(dev, dev->dbgfs_dir);
--
2.25.1