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Subject[PATCH v1 3/4] platform/x86/intel/pmt: telemetry: Fix fixed region handling
Date
From: "David E. Box" <david.e.box@linux.intel.com>

Use the telem_type and the fixed block guid to determine if an entry is a
fixed region. For certain platforms we don't support this.

Cc: Srinivas Pandruvada <srinivas.pandruvada@intel.com>
Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Signed-off-by: Gayatri Kammela <gayatri.kammela@linux.intel.com>
---
drivers/platform/x86/intel/pmt/telemetry.c | 18 +++++++++++++++---
1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/drivers/platform/x86/intel/pmt/telemetry.c b/drivers/platform/x86/intel/pmt/telemetry.c
index f73ecfd4a309..5e4009c05ecf 100644
--- a/drivers/platform/x86/intel/pmt/telemetry.c
+++ b/drivers/platform/x86/intel/pmt/telemetry.c
@@ -23,12 +23,19 @@
#define TELEM_GUID_OFFSET 0x4
#define TELEM_BASE_OFFSET 0x8
#define TELEM_ACCESS(v) ((v) & GENMASK(3, 0))
+#define TELEM_TYPE(v) (((v) & GENMASK(7, 4)) >> 4)
/* size is in bytes */
#define TELEM_SIZE(v) (((v) & GENMASK(27, 12)) >> 10)

/* Used by client hardware to identify a fixed telemetry entry*/
#define TELEM_CLIENT_FIXED_BLOCK_GUID 0x10000000

+enum telem_type {
+ TELEM_TYPE_PUNIT = 0,
+ TELEM_TYPE_CRASHLOG,
+ TELEM_TYPE_PUNIT_FIXED,
+};
+
struct pmt_telem_priv {
int num_entries;
struct intel_pmt_entry entry[];
@@ -39,10 +46,15 @@ static bool pmt_telem_region_overlaps(struct intel_pmt_entry *entry,
{
u32 guid = readl(entry->disc_table + TELEM_GUID_OFFSET);

- if (guid != TELEM_CLIENT_FIXED_BLOCK_GUID)
- return false;
+ if (intel_pmt_is_early_client_hw(dev)) {
+ u32 type = TELEM_TYPE(readl(entry->disc_table));
+
+ if ((type == TELEM_TYPE_PUNIT_FIXED) ||
+ (guid == TELEM_CLIENT_FIXED_BLOCK_GUID))
+ return true;
+ }

- return intel_pmt_is_early_client_hw(dev);
+ return false;
}

static int pmt_telem_header_decode(struct intel_pmt_entry *entry,
--
2.32.0
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