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| author | Armin Wolf <W_Armin@gmx.de> | 2024-03-04 21:50:04 +0100 |
|---|---|---|
| committer | Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> | 2024-03-12 12:48:05 +0200 |
| commit | 9ced197640a837ed4a7505e1be8be3ce541efffa (patch) | |
| tree | a3cf4e41555b611dc0808b7111735faf3d0785e2 /drivers/platform/x86 | |
| parent | e42dddce83a0578a518cb7078930c8269a6083af (diff) | |
| download | linux-9ced197640a837ed4a7505e1be8be3ce541efffa.tar.gz linux-9ced197640a837ed4a7505e1be8be3ce541efffa.tar.bz2 linux-9ced197640a837ed4a7505e1be8be3ce541efffa.zip | |
platform/x86/amd/pmf: Use struct for cookie header
The cookie header consists of a sign field and a length field.
Combine both in a single struct to make accesses simpler.
Compile-tested only.
Suggested-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Reviewed-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Link: https://lore.kernel.org/r/20240304205005.10078-4-W_Armin@gmx.de
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Diffstat (limited to 'drivers/platform/x86')
| -rw-r--r-- | drivers/platform/x86/amd/pmf/pmf.h | 6 | ||||
| -rw-r--r-- | drivers/platform/x86/amd/pmf/tee-if.c | 9 |
2 files changed, 9 insertions, 6 deletions
diff --git a/drivers/platform/x86/amd/pmf/pmf.h b/drivers/platform/x86/amd/pmf/pmf.h index bcf777a5659a..0c90805dc85b 100644 --- a/drivers/platform/x86/amd/pmf/pmf.h +++ b/drivers/platform/x86/amd/pmf/pmf.h @@ -17,7 +17,11 @@ #define POLICY_BUF_MAX_SZ 0x4b000 #define POLICY_SIGN_COOKIE 0x31535024 #define POLICY_COOKIE_OFFSET 0x10 -#define POLICY_COOKIE_LEN 0x14 + +struct cookie_header { + u32 sign; + u32 length; +} __packed; /* APMF Functions */ #define APMF_FUNC_VERIFY_INTERFACE 0 diff --git a/drivers/platform/x86/amd/pmf/tee-if.c b/drivers/platform/x86/amd/pmf/tee-if.c index 58ec2c9606e1..71ea7eefc211 100644 --- a/drivers/platform/x86/amd/pmf/tee-if.c +++ b/drivers/platform/x86/amd/pmf/tee-if.c @@ -246,17 +246,16 @@ static void amd_pmf_invoke_cmd(struct work_struct *work) static int amd_pmf_start_policy_engine(struct amd_pmf_dev *dev) { - u32 cookie, length; + struct cookie_header *header; int res; - cookie = *(u32 *)(dev->policy_buf + POLICY_COOKIE_OFFSET); - length = *(u32 *)(dev->policy_buf + POLICY_COOKIE_LEN); + header = (struct cookie_header *)(dev->policy_buf + POLICY_COOKIE_OFFSET); - if (cookie != POLICY_SIGN_COOKIE || !length) + if (header->sign != POLICY_SIGN_COOKIE || !header->length) return -EINVAL; /* Update the actual length */ - dev->policy_sz = length + 512; + dev->policy_sz = header->length + 512; res = amd_pmf_invoke_cmd_init(dev); if (res == TA_PMF_TYPE_SUCCESS) { /* Now its safe to announce that smart pc is enabled */ |