| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <20230112195539.946630819@infradead.org>
Date: Thu, 12 Jan 2023 20:43:24 +0100
From: Peter Zijlstra <peterz@...radead.org>
To: peterz@...radead.org
Cc: richard.henderson@...aro.org, ink@...assic.park.msu.ru,
mattst88@...il.com, vgupta@...nel.org, linux@...linux.org.uk,
nsekhar@...com, brgl@...ev.pl, ulli.kroll@...glemail.com,
linus.walleij@...aro.org, shawnguo@...nel.org,
Sascha Hauer <s.hauer@...gutronix.de>, kernel@...gutronix.de,
festevam@...il.com, linux-imx@....com, tony@...mide.com,
khilman@...nel.org, krzysztof.kozlowski@...aro.org,
alim.akhtar@...sung.com, catalin.marinas@....com, will@...nel.org,
guoren@...nel.org, bcain@...cinc.com, chenhuacai@...nel.org,
kernel@...0n.name, geert@...ux-m68k.org, sammy@...my.net,
monstr@...str.eu, tsbogend@...ha.franken.de, dinguyen@...nel.org,
jonas@...thpole.se, stefan.kristiansson@...nalahti.fi,
shorne@...il.com, James.Bottomley@...senPartnership.com,
deller@....de, mpe@...erman.id.au, npiggin@...il.com,
christophe.leroy@...roup.eu, paul.walmsley@...ive.com,
palmer@...belt.com, aou@...s.berkeley.edu, hca@...ux.ibm.com,
gor@...ux.ibm.com, agordeev@...ux.ibm.com,
borntraeger@...ux.ibm.com, svens@...ux.ibm.com,
ysato@...rs.sourceforge.jp, dalias@...c.org, davem@...emloft.net,
richard@....at, anton.ivanov@...bridgegreys.com,
johannes@...solutions.net, tglx@...utronix.de, mingo@...hat.com,
bp@...en8.de, dave.hansen@...ux.intel.com, x86@...nel.org,
hpa@...or.com, acme@...nel.org, mark.rutland@....com,
alexander.shishkin@...ux.intel.com, jolsa@...nel.org,
namhyung@...nel.org, jgross@...e.com, srivatsa@...il.mit.edu,
amakhalov@...are.com, pv-drivers@...are.com,
boris.ostrovsky@...cle.com, chris@...kel.net, jcmvbkbc@...il.com,
rafael@...nel.org, lenb@...nel.org, pavel@....cz,
gregkh@...uxfoundation.org, mturquette@...libre.com,
sboyd@...nel.org, daniel.lezcano@...aro.org, lpieralisi@...nel.org,
sudeep.holla@....com, agross@...nel.org, andersson@...nel.org,
konrad.dybcio@...aro.org, anup@...infault.org,
thierry.reding@...il.com, jonathanh@...dia.com,
jacob.jun.pan@...ux.intel.com, atishp@...shpatra.org,
Arnd Bergmann <arnd@...db.de>, yury.norov@...il.com,
andriy.shevchenko@...ux.intel.com, linux@...musvillemoes.dk,
dennis@...nel.org, tj@...nel.org, cl@...ux.com,
rostedt@...dmis.org, mhiramat@...nel.org, frederic@...nel.org,
paulmck@...nel.org, pmladek@...e.com, senozhatsky@...omium.org,
john.ogness@...utronix.de, juri.lelli@...hat.com,
vincent.guittot@...aro.org, dietmar.eggemann@....com,
bsegall@...gle.com, mgorman@...e.de, bristot@...hat.com,
vschneid@...hat.com, ryabinin.a.a@...il.com, glider@...gle.com,
andreyknvl@...il.com, dvyukov@...gle.com,
vincenzo.frascino@....com,
Andrew Morton <akpm@...ux-foundation.org>, jpoimboe@...nel.org,
linux-alpha@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-snps-arc@...ts.infradead.org, linux-omap@...r.kernel.org,
linux-samsung-soc@...r.kernel.org, linux-csky@...r.kernel.org,
linux-hexagon@...r.kernel.org, linux-ia64@...r.kernel.org,
loongarch@...ts.linux.dev, linux-m68k@...ts.linux-m68k.org,
linux-mips@...r.kernel.org, openrisc@...ts.librecores.org,
linux-parisc@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
linux-riscv@...ts.infradead.org, linux-s390@...r.kernel.org,
linux-sh@...r.kernel.org, sparclinux@...r.kernel.org,
linux-um@...ts.infradead.org, linux-perf-users@...r.kernel.org,
virtualization@...ts.linux-foundation.org,
linux-xtensa@...ux-xtensa.org, linux-acpi@...r.kernel.org,
linux-pm@...r.kernel.org, linux-clk@...r.kernel.org,
linux-arm-msm@...r.kernel.org, linux-tegra@...r.kernel.org,
linux-arch@...r.kernel.org, linux-mm@...ck.org,
linux-trace-kernel@...r.kernel.org, kasan-dev@...glegroups.com,
"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
Ulf Hansson <ulf.hansson@...aro.org>
Subject: [PATCH v3 10/51] cpuidle,armada: Push RCU-idle into driver
Doing RCU-idle outside the driver, only to then temporarily enable it
again before going idle is daft.
Notably the cpu_pm_*() calls implicitly re-enable RCU for a bit.
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Reviewed-by: Frederic Weisbecker <frederic@...nel.org>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Tested-by: Tony Lindgren <tony@...mide.com>
Tested-by: Ulf Hansson <ulf.hansson@...aro.org>
---
drivers/cpuidle/cpuidle-mvebu-v7.c | 7 +++++++
1 file changed, 7 insertions(+)
--- a/drivers/cpuidle/cpuidle-mvebu-v7.c
+++ b/drivers/cpuidle/cpuidle-mvebu-v7.c
@@ -36,7 +36,10 @@ static int mvebu_v7_enter_idle(struct cp
if (drv->states[index].flags & MVEBU_V7_FLAG_DEEP_IDLE)
deepidle = true;
+ ct_idle_enter();
ret = mvebu_v7_cpu_suspend(deepidle);
+ ct_idle_exit();
+
cpu_pm_exit();
if (ret)
@@ -49,6 +52,7 @@ static struct cpuidle_driver armadaxp_id
.name = "armada_xp_idle",
.states[0] = ARM_CPUIDLE_WFI_STATE,
.states[1] = {
+ .flags = CPUIDLE_FLAG_RCU_IDLE,
.enter = mvebu_v7_enter_idle,
.exit_latency = 100,
.power_usage = 50,
@@ -57,6 +61,7 @@ static struct cpuidle_driver armadaxp_id
.desc = "CPU power down",
},
.states[2] = {
+ .flags = CPUIDLE_FLAG_RCU_IDLE,
.enter = mvebu_v7_enter_idle,
.exit_latency = 1000,
.power_usage = 5,
@@ -72,6 +77,7 @@ static struct cpuidle_driver armada370_i
.name = "armada_370_idle",
.states[0] = ARM_CPUIDLE_WFI_STATE,
.states[1] = {
+ .flags = CPUIDLE_FLAG_RCU_IDLE,
.enter = mvebu_v7_enter_idle,
.exit_latency = 100,
.power_usage = 5,
@@ -87,6 +93,7 @@ static struct cpuidle_driver armada38x_i
.name = "armada_38x_idle",
.states[0] = ARM_CPUIDLE_WFI_STATE,
.states[1] = {
+ .flags = CPUIDLE_FLAG_RCU_IDLE,
.enter = mvebu_v7_enter_idle,
.exit_latency = 10,
.power_usage = 5,
Powered by blists - more mailing lists