diff options
| author | Jay Buddhabhatti <jay.buddhabhatti@amd.com> | 2026-07-29 05:25:21 -0700 |
|---|---|---|
| committer | Michal Simek <michal.simek@amd.com> | 2026-08-10 09:30:44 +0200 |
| commit | 84dbfa5519cf6583d09ee0123ac580542b144553 (patch) | |
| tree | a8665ab522e9f078e61f3e07f152cca714cb8102 /include/linux | |
| parent | 00bee072c8ae394b029ed4ce6fc8def3e5627e1c (diff) | |
firmware: xilinx: Release all peripheral devices from firmware
During a kexec restart, only the kernel is reloaded while devices
allocated in firmware persist, causing state mismatches between the
kernel and firmware.
Introduce PM_DEV_ALL_PERIPH node ID (0x18224FFFU) to release all
peripheral devices during kexec. On graceful restarts, this happens in
zynqmp_firmware_shutdown(). On crash kernel restarts, it happens in
zynqmp_firmware_probe() of the reloaded kernel.
Releasing all peripherals depends on firmware support for the
PM_DEV_ALL_PERIPH node ID. On firmware that does not implement it (the
feature check reports a version below PM_API_VERSION_3) the release is
skipped and a warning such as "Bulk device release is not supported by
firmware" is logged, e.g. on Versal NET firmware that predates this API.
Signed-off-by: Jay Buddhabhatti <jay.buddhabhatti@amd.com>
Reviewed-by: Radhey Shyam Pandey <radhey.shyam.pandey@amd.com>
Reviewed-by: Prasanna Kumar T S M <ptsm@linux.microsoft.com>
Link: https://patch.msgid.link/20260729122522.3732875-3-jay.buddhabhatti@amd.com
Signed-off-by: Michal Simek <michal.simek@amd.com>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/firmware/xlnx-zynqmp.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h index baaa88b0b197..ac39e5492961 100644 --- a/include/linux/firmware/xlnx-zynqmp.h +++ b/include/linux/firmware/xlnx-zynqmp.h @@ -50,6 +50,7 @@ /* PM API versions */ #define PM_API_VERSION_1 1 #define PM_API_VERSION_2 2 +#define PM_API_VERSION_3 3 #define PM_PINCTRL_PARAM_SET_VERSION 2 @@ -145,6 +146,9 @@ #define XPM_EVENT_ERROR_MASK_NOC_NCR BIT(13) #define XPM_EVENT_ERROR_MASK_NOC_CR BIT(12) +/* Node ID for all peripheral devices */ +#define PM_DEV_ALL_PERIPH 0x18224FFFU + enum pm_module_id { PM_MODULE_ID = 0x0, XPM_MODULE_ID = 0x2, |