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platform/x86: intel_telemetry: Fix PSS event register mask

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JIRA: https://issues.redhat.com/browse/RHEL-176441

commit 39e9c376ac42705af4ed4ae39eec028e8bced9b4
Author: Kaushlendra Kumar <kaushlendra.kumar@intel.com>
Date:   Wed Dec 24 11:41:44 2025 +0530

    platform/x86: intel_telemetry: Fix PSS event register mask

    The PSS telemetry info parsing incorrectly applies
    TELEM_INFO_SRAMEVTS_MASK when extracting event register
    count from firmware response. This reads bits 15-8 instead
    of the correct bits 7-0, causing misdetection of hardware
    capabilities.

    The IOSS path correctly uses TELEM_INFO_NENABLES_MASK for
    register count. Apply the same mask to PSS parsing for
    consistency.

    Fixes: 9d16b482b0 ("platform:x86: Add Intel telemetry platform driver")
    Signed-off-by: Kaushlendra Kumar <kaushlendra.kumar@intel.com>
    Link: https://patch.msgid.link/20251224061144.3925519-1-kaushlendra.kumar@intel.com
    Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
    Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>

Signed-off-by: Steve Best <sbest@redhat.com>
This commit is contained in:
Steve Best
2026-05-18 13:44:51 -04:00
parent 9192e6c6ec
commit 814050ec71
1 changed files with 1 additions and 1 deletions
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drivers/platform/x86/intel/telemetry/pltdrv.c
+1 -1
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@@ -610,7 +610,7 @@ static int telemetry_setup(struct platform_device *pdev)
/* Get telemetry Info */
events = (read_buf & TELEM_INFO_SRAMEVTS_MASK) >>
TELEM_INFO_SRAMEVTS_SHIFT;
event_regs = read_buf & TELEM_INFO_SRAMEVTS_MASK;
event_regs = read_buf & TELEM_INFO_NENABLES_MASK;
if ((events < TELEM_MAX_EVENTS_SRAM) ||
(event_regs < TELEM_MAX_EVENTS_SRAM)) {
dev_err(&pdev->dev, "PSS:Insufficient Space for SRAM Trace\n");