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platform/x86/amd/pmf: Add debugging message for missing policy data

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If a machine advertises Smart PC support but is missing policy data
show a debugging message to help clarify why Smart PC wasn't enabled.

Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://lore.kernel.org/r/20240217014107.113749-2-mario.limonciello@amd.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Mario Limonciello 2024-02-16 19:41:06 -06:00 committed by Hans de Goede
parent b2b6fa6f5c
commit 20545af302
1 changed files with 3 additions and 1 deletions
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4
drivers/platform/x86/amd/pmf/tee-if.c
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@ -252,8 +252,10 @@ static int amd_pmf_start_policy_engine(struct amd_pmf_dev *dev)
cookie = readl(dev->policy_buf + POLICY_COOKIE_OFFSET);
length = readl(dev->policy_buf + POLICY_COOKIE_LEN);
if (cookie != POLICY_SIGN_COOKIE || !length)
if (cookie != POLICY_SIGN_COOKIE || !length) {
dev_dbg(dev->dev, "cookie doesn't match\n");
return -EINVAL;
}
/* Update the actual length */
dev->policy_sz = length + 512;