From: Aboorva Devarajan Date: Mon, 8 Sep 2025 08:51:23 +0000 (+0530) Subject: powerpc/powernv: Enable cpuidle state detection for POWER11 X-Git-Tag: v6.19-rc3~5^2~1 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fbe409d138b1d8a8b91cdad19cf95495e8ebe1ee;p=thirdparty%2Fkernel%2Fstable.git powerpc/powernv: Enable cpuidle state detection for POWER11 Extend cpuidle state detection to POWER11 by updating the PVR check. This ensures POWER11 correctly recognizes supported stop states, similar to POWER9 and POWER10. Without Patch: (Power11 - PowerNV systems) CPUidle driver: powernv_idle CPUidle governor: menu analyzing CPU 927: Number of idle states: 1 Available idle states: snooze snooze: Flags/Description: snooze Latency: 0 Usage: 251631 Duration: 207497715900 -- With Patch: (Power11 - PowerNV systems) CPUidle driver: powernv_idle CPUidle governor: menu analyzing CPU 959: Number of idle states: 4 Available idle states: snooze stop0_lite stop0 stop3 snooze: Flags/Description: snooze Latency: 0 Usage: 2 Duration: 33 stop0_lite: Flags/Description: stop0_lite Latency: 1 Usage: 1 Duration: 52 stop0: Flags/Description: stop0 Latency: 10 Usage: 13 Duration: 1920 stop3: Flags/Description: stop3 Latency: 45 Usage: 381 Duration: 21638478 Signed-off-by: Aboorva Devarajan Tested-by: Madadi Vineeth Reddy Reviewed-by: Madadi Vineeth Reddy Signed-off-by: Madhavan Srinivasan Link: https://patch.msgid.link/20250908085123.216780-1-aboorvad@linux.ibm.com --- diff --git a/arch/powerpc/platforms/powernv/idle.c b/arch/powerpc/platforms/powernv/idle.c index d98b933e4984c..e4f4e907f6e36 100644 --- a/arch/powerpc/platforms/powernv/idle.c +++ b/arch/powerpc/platforms/powernv/idle.c @@ -1171,8 +1171,9 @@ static void __init pnv_arch300_idle_init(void) u64 max_residency_ns = 0; int i; - /* stop is not really architected, we only have p9,p10 drivers */ - if (!pvr_version_is(PVR_POWER10) && !pvr_version_is(PVR_POWER9)) + /* stop is not really architected, we only have p9,p10 and p11 drivers */ + if (!pvr_version_is(PVR_POWER9) && !pvr_version_is(PVR_POWER10) && + !pvr_version_is(PVR_POWER11)) return; /* @@ -1189,8 +1190,8 @@ static void __init pnv_arch300_idle_init(void) struct pnv_idle_states_t *state = &pnv_idle_states[i]; u64 psscr_rl = state->psscr_val & PSSCR_RL_MASK; - /* No deep loss driver implemented for POWER10 yet */ - if (pvr_version_is(PVR_POWER10) && + /* No deep loss driver implemented for POWER10 and POWER11 yet */ + if ((pvr_version_is(PVR_POWER10) || pvr_version_is(PVR_POWER11)) && state->flags & (OPAL_PM_TIMEBASE_STOP|OPAL_PM_LOSE_FULL_CONTEXT)) continue;