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Wysocki" , Ulf Hansson Subject: [PATCH v3 12/51] cpuidle,dt: Push RCU-idle into driver References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-Stat-Signature: saxmentkzi4d9e9odd6dh8d7tfdupn9w X-Rspam-User: X-Rspamd-Queue-Id: C78AB80009 X-Rspamd-Server: rspam06 X-HE-Tag: 1673553448-796728 X-HE-Meta: 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 Ba2fm32x 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 bgHVeiNc 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 d4G4NBJo 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 q721GSBp TZ/8MzL5k41bURb+FVL7L+c7/SMKHa00bMzj1mCH0AXZ86vfwVOk7Yw5brSvjsBGoRoQI+4XLE2ZyIQ9pJ0R0+f9Y/De9v4jXR5Nx+ZoU8Sw== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Doing RCU-idle outside the driver, only to then temporarily enable it again before going idle is daft. Notably: this converts all dt_init_idle_driver() and __CPU_PM_CPU_IDLE_ENTER() users for they are inextrably intertwined. Signed-off-by: Peter Zijlstra (Intel) Acked-by: Rafael J. Wysocki Acked-by: Frederic Weisbecker Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- drivers/acpi/processor_idle.c | 2 ++ drivers/cpuidle/cpuidle-arm.c | 1 + drivers/cpuidle/cpuidle-big_little.c | 8 ++++++-- drivers/cpuidle/cpuidle-psci.c | 1 + drivers/cpuidle/cpuidle-qcom-spm.c | 1 + drivers/cpuidle/cpuidle-riscv-sbi.c | 1 + drivers/cpuidle/dt_idle_states.c | 2 +- include/linux/cpuidle.h | 2 ++ 8 files changed, 15 insertions(+), 3 deletions(-) --- a/drivers/acpi/processor_idle.c +++ b/drivers/acpi/processor_idle.c @@ -1219,6 +1219,8 @@ static int acpi_processor_setup_lpi_stat state->target_residency = lpi->min_residency; if (lpi->arch_flags) state->flags |= CPUIDLE_FLAG_TIMER_STOP; + if (i != 0 && lpi->entry_method == ACPI_CSTATE_FFH) + state->flags |= CPUIDLE_FLAG_RCU_IDLE; state->enter = acpi_idle_lpi_enter; drv->safe_state_index = i; } --- a/drivers/cpuidle/cpuidle-big_little.c +++ b/drivers/cpuidle/cpuidle-big_little.c @@ -64,7 +64,8 @@ static struct cpuidle_driver bl_idle_lit .enter = bl_enter_powerdown, .exit_latency = 700, .target_residency = 2500, - .flags = CPUIDLE_FLAG_TIMER_STOP, + .flags = CPUIDLE_FLAG_TIMER_STOP | + CPUIDLE_FLAG_RCU_IDLE, .name = "C1", .desc = "ARM little-cluster power down", }, @@ -85,7 +86,8 @@ static struct cpuidle_driver bl_idle_big .enter = bl_enter_powerdown, .exit_latency = 500, .target_residency = 2000, - .flags = CPUIDLE_FLAG_TIMER_STOP, + .flags = CPUIDLE_FLAG_TIMER_STOP | + CPUIDLE_FLAG_RCU_IDLE, .name = "C1", .desc = "ARM big-cluster power down", }, @@ -124,11 +126,13 @@ static int bl_enter_powerdown(struct cpu struct cpuidle_driver *drv, int idx) { cpu_pm_enter(); + ct_idle_enter(); cpu_suspend(0, bl_powerdown_finisher); /* signals the MCPM core that CPU is out of low power state */ mcpm_cpu_powered_up(); + ct_idle_exit(); cpu_pm_exit(); --- a/drivers/cpuidle/dt_idle_states.c +++ b/drivers/cpuidle/dt_idle_states.c @@ -77,7 +77,7 @@ static int init_state_node(struct cpuidl if (err) desc = state_node->name; - idle_state->flags = 0; + idle_state->flags = CPUIDLE_FLAG_RCU_IDLE; if (of_property_read_bool(state_node, "local-timer-stop")) idle_state->flags |= CPUIDLE_FLAG_TIMER_STOP; /* --- a/include/linux/cpuidle.h +++ b/include/linux/cpuidle.h @@ -289,7 +289,9 @@ extern s64 cpuidle_governor_latency_req( if (!is_retention) \ __ret = cpu_pm_enter(); \ if (!__ret) { \ + ct_idle_enter(); \ __ret = low_level_idle_enter(state); \ + ct_idle_exit(); \ if (!is_retention) \ cpu_pm_exit(); \ } \