From: Scott Wood <scottwood@freescale.com>
To: Zhao Chenhui <chenhui.zhao@freescale.com>
Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 12/15] powerpc/85xx: add time base sync support for e6500
Date: Tue, 23 Apr 2013 19:04:06 -0500 [thread overview]
Message-ID: <1366761846.5825.21@snotra> (raw)
In-Reply-To: <1366368468-29143-12-git-send-email-chenhui.zhao@freescale.com> (from chenhui.zhao@freescale.com on Fri Apr 19 05:47:45 2013)
On 04/19/2013 05:47:45 AM, Zhao Chenhui wrote:
> From: Chen-Hui Zhao <chenhui.zhao@freescale.com>
>=20
> For e6500, two threads in one core share one time base. Just need
> to do time base sync on first thread of one core, and skip it on
> the other thread.
>=20
> Signed-off-by: Zhao Chenhui <chenhui.zhao@freescale.com>
> Signed-off-by: Li Yang <leoli@freescale.com>
> Signed-off-by: Andy Fleming <afleming@freescale.com>
> ---
> arch/powerpc/platforms/85xx/smp.c | 52 =20
> +++++++++++++++++++++++++++++++-----
> 1 files changed, 44 insertions(+), 8 deletions(-)
>=20
> diff --git a/arch/powerpc/platforms/85xx/smp.c =20
> b/arch/powerpc/platforms/85xx/smp.c
> index 74d8cde..5f3eee3 100644
> --- a/arch/powerpc/platforms/85xx/smp.c
> +++ b/arch/powerpc/platforms/85xx/smp.c
> @@ -26,6 +26,7 @@
> #include <asm/cacheflush.h>
> #include <asm/dbell.h>
> #include <asm/fsl_guts.h>
> +#include <asm/cputhreads.h>
>=20
> #include <sysdev/fsl_soc.h>
> #include <sysdev/mpic.h>
> @@ -45,6 +46,7 @@ static u64 timebase;
> static int tb_req;
> static int tb_valid;
> static u32 cur_booting_core;
> +static bool rcpmv2;
>=20
> #ifdef CONFIG_PPC_E500MC
> /* get a physical mask of online cores and booting core */
> @@ -53,26 +55,40 @@ static inline u32 get_phy_cpu_mask(void)
> u32 mask;
> int cpu;
>=20
> - mask =3D 1 << cur_booting_core;
> - for_each_online_cpu(cpu)
> - mask |=3D 1 << get_hard_smp_processor_id(cpu);
> + if (smt_capable()) {
> + /* two threads in one core share one time base */
> + mask =3D 1 << cpu_core_index_of_thread(cur_booting_core);
> + for_each_online_cpu(cpu)
> + mask |=3D 1 << cpu_core_index_of_thread(
> + get_hard_smp_processor_id(cpu));
> + } else {
> + mask =3D 1 << cur_booting_core;
> + for_each_online_cpu(cpu)
> + mask |=3D 1 << get_hard_smp_processor_id(cpu);
> + }
Where is smt_capable defined()? I assume somewhere in the patchset but =20
it's a pain to search 12 patches...
Is this really about whether we're SMT-capable or whether we have rcpm =20
v2?
-Scott=
next prev parent reply other threads:[~2013-04-24 0:04 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-19 10:47 [PATCH v2 01/15] powerpc/85xx: cache operations for Freescale SoCs based on BOOK3E Zhao Chenhui
2013-04-19 10:47 ` [PATCH v2 02/15] powerpc/85xx: add sleep and deep sleep support Zhao Chenhui
2013-04-23 23:53 ` Scott Wood
2013-04-28 10:20 ` Zhao Chenhui
2013-04-19 10:47 ` [PATCH v2 03/15] fsl_pmc: Add API to enable device as wakeup event source Zhao Chenhui
2013-04-19 10:47 ` [PATCH v2 04/15] pm: add power node to dts Zhao Chenhui
2013-04-19 10:47 ` [PATCH v2 05/15] fsl_pmc: update device bindings Zhao Chenhui
2013-06-03 22:43 ` Scott Wood
2013-04-19 10:47 ` [PATCH v2 06/15] powerpc/85xx: add support to JOG feature using cpufreq interface Zhao Chenhui
2013-04-22 3:25 ` Viresh Kumar
2013-04-22 10:56 ` Zhao Chenhui
2013-04-19 10:47 ` [PATCH v2 07/15] powerpc/85xx: add time base sync for SoCs based on e500mc/e5500 Zhao Chenhui
2013-04-23 23:58 ` Scott Wood
2013-04-19 10:47 ` [PATCH v2 08/15] powerpc/85xx: add cpu hotplug support for e500mc/e5500 Zhao Chenhui
2013-04-19 10:47 ` [PATCH v2 09/15] powerpc/rcpm: add sleep feature for SoCs using RCPM Zhao Chenhui
2013-04-19 10:47 ` [PATCH v2 10/15] powerpc/85xx: fix 64-bit support for cpu hotplug Zhao Chenhui
2013-04-19 10:47 ` [PATCH v2 11/15] powerpc/rcpm: add struct ccsr_rcpm_v2 Zhao Chenhui
2013-04-19 10:47 ` [PATCH v2 12/15] powerpc/85xx: add time base sync support for e6500 Zhao Chenhui
2013-04-24 0:04 ` Scott Wood [this message]
2013-04-24 11:29 ` Zhao Chenhui
2013-04-24 22:38 ` Scott Wood
2013-04-25 0:28 ` Zhao Chenhui
2013-04-26 0:07 ` Scott Wood
2013-04-28 9:56 ` Zhao Chenhui
2013-04-29 20:18 ` Scott Wood
2013-04-19 10:47 ` [PATCH v2 13/15] powerpc/85xx: add support for e6500 L1 cache operation Zhao Chenhui
2013-04-24 0:00 ` Scott Wood
2013-04-24 11:14 ` Zhao Chenhui
2013-04-19 10:47 ` [PATCH v2 14/15] powerpc/smp: add cpu hotplug support for e6500 Zhao Chenhui
2013-04-19 10:47 ` [PATCH v2 15/15] powerpc/rcpm: add sleep support for T4/B4 chips Zhao Chenhui
2013-04-23 9:53 ` [linuxppc-release] [PATCH v2 01/15] powerpc/85xx: cache operations for Freescale SoCs based on BOOK3E Zhao Chenhui
2013-04-23 23:46 ` Scott Wood
2013-04-24 11:08 ` Zhao Chenhui
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