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
| ||
|
Date: Fri, 5 Jun 2015 12:47:56 +0800 From: Caesar Wang <wxt@...k-chips.com> To: Heiko Stuebner <heiko@...ech.de> Cc: dianders@...omium.org, Dmitry Torokhov <dmitry.torokhov@...il.com>, linux-rockchip@...ts.infradead.org, Caesar Wang <wxt@...k-chips.com>, Russell King <linux@....linux.org.uk>, linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org Subject: [PATCH 2/3] ARM: rockchip: ensure CPU to enter WIF state In idle mode, core1/2/3 of Cortex-A17 should be either power off or in WFI/WFE state. we can delay 1ms to ensure the CPU enter WFI state. Signed-off-by: Caesar Wang <wxt@...k-chips.com> --- arch/arm/mach-rockchip/platsmp.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/arm/mach-rockchip/platsmp.c b/arch/arm/mach-rockchip/platsmp.c index 1230d3d..978c357 100644 --- a/arch/arm/mach-rockchip/platsmp.c +++ b/arch/arm/mach-rockchip/platsmp.c @@ -316,6 +316,9 @@ static void __init rockchip_smp_prepare_cpus(unsigned int max_cpus) #ifdef CONFIG_HOTPLUG_CPU static int rockchip_cpu_kill(unsigned int cpu) { + /* ensure CPU can enter the WFI/WFE state */ + mdelay(1); + pmu_set_power_domain(0 + cpu, false); return 1; } -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists