Re: [PATCH] [RFC][V3] bluegene: use MMU feature flag to conditionalize L1 writethrough code

On Thu, Jun 9, 2011 at 6:42 PM, Benjamin Herrenschmidt wrote: > On Thu, 2011-06-09 at 09:58 -0500, Eric Van Hensbergen wrote: >> On Tue, Jun 7, 2011 at 7:47 PM, Benjamin Herrenschmidt >> wrote: >> > BTW. Care to explain to me why you have U2 -both- in the arguments to

Re: [PATCH] [RFC][V3] bluegene: use MMU feature flag to conditionalize L1 writethrough code

On Tue, Jun 7, 2011 at 7:47 PM, Benjamin Herrenschmidt wrote: > On Tue, 2011-06-07 at 16:36 -0500, Eric Van Hensbergen wrote: > >> open to alternatives.  jimix also suggested changing NEED_L1_WRITETHROUGH >> to DCBZ_BROKEN, which I'm open to if you thin

Re: [PATCH] [RFC][V3] bluegene: add entry to cpu table

>> +#define PPC_FEATURE_HAS_FPU_FP2              0x0040 > > Any chance for a better name ? > That's the official external name, it sucks. I'm happy to PPC_FEATURE_DOUBLE_HUMMER if you'd prefer, otherwise I'm not feeling too creative, but am open to artistic suggestions. -eric ___

[PATCH] [RFC][V3] bluegene: use MMU feature flag to conditionalize L1 writethrough code

ing to stub code inside of the MMU_FTRs so I don't have so many no-ops. I'm open to alternatives. jimix also suggested changing NEED_L1_WRITETHROUGH to DCBZ_BROKEN, which I'm open to if you think appropriate, or maybe DCBZ_BROKEN_DAMNIT would be more apt. Thanks for any help.

[PATCH] [RFC][V3] bluegene: add entry to cpu table

ing other code as an example. Thanks for any feedback. Signed-off-by: Eric Van Hensbergen --- arch/powerpc/include/asm/cputable.h |1 + arch/powerpc/include/asm/mmu.h |9 + arch/powerpc/kernel/cpu_setup_44x.S |1 + arch/powerpc/kernel/cputable.c | 16

Re: [bg-linux] [PATCH 6/7] [RFC] enable early TLBs for BG/P

On Thu, May 19, 2011 at 10:52 PM, Benjamin Herrenschmidt wrote: >> Unfortunately, the firmware is also required: >> - to configure Blue Gene Interrupt Controller(BIC) >> - to configure Torus DMA unit. e.g. fifo >> - to configure global interrupt (even we don't use, we need to disable >> some chann

Re: [PATCH 6/7] [RFC] enable early TLBs for BG/P

On Thu, May 19, 2011 at 7:39 PM, Benjamin Herrenschmidt wrote: > On Wed, 2011-05-18 at 16:24 -0500, Eric Van Hensbergen wrote: >> BG/P maps firmware with an early TLB > > That's a bit gross. How often do you call that firmware in practice ? > Aren't you better off i

Re: [PATCH 2/7] [RFC] add bluegene entry to cputable

On Thu, May 19, 2011 at 7:35 PM, Benjamin Herrenschmidt wrote: > On Wed, 2011-05-18 at 16:24 -0500, Eric Van Hensbergen wrote: >> +             .dcache_bsize           = 32, >> +             .cpu_setup              = __

Re: [PATCH 5/7] [RFC] force 32-byte aligned kmallocs

On Thu, May 19, 2011 at 7:36 PM, Benjamin Herrenschmidt wrote: > On Wed, 2011-05-18 at 16:24 -0500, Eric Van Hensbergen wrote: >> >> -#ifdef CONFIG_NOT_COHERENT_CACHE >> +#if defined(CONFIG_NOT_COHERENT_CACHE) || defined(CONFIG_BGP) >>  #define ARCH_DMA_MINALIGN  

Re: [PATCH 3/7] [RFC] add support for BlueGene/P FPU

On Thu, May 19, 2011 at 6:16 PM, Michael Neuling wrote: > In message you wrote: >> On Thu, May 19, 2011 at 4:36 PM, Michael Neuling wrote: >> > In message you wrote= >> : >> >> On Thu, May 19, 2011 at 12:58 AM, Michael Neuling wr= >> ote=3D >> >> : >> >> > Eric, >> >> > >> >> >> This patch add

Re: [PATCH 3/7] [RFC] add support for BlueGene/P FPU

Damnit Mikey, just after I hit send on [V2]. On Thu, May 19, 2011 at 4:36 PM, Michael Neuling wrote: > In message you wrote: >> On Thu, May 19, 2011 at 12:58 AM, Michael Neuling wrote= >> : >> > Eric, >> > >> >> This patch adds save/restore register support for the BlueGene/P >> >> double h

[PATCH 4/7] [RFC][V2] enable BGP_L1_WRITETHROUGH mode for BG/P

BG/P nodes need to be configured for writethrough to work in SMP configurations. This patch adds the right hooks in the MMU code to make sure BGP_L1_WRITETHROUGH configurations are setup for BG/P. Signed-off-by: Eric Van Hensbergen --- arch/powerpc/include/asm/mmu-44x.h |2 ++ arch

[PATCH 3/7] [RFC][V2] add support for BlueGene/P Double FPU

This patch adds save/restore register support for the BlueGene/P double FPU. Since there are two FPUs, we need to save and restore twice the registers. Fortunately BG/P gives us some opcodes to assist with that task. Signed-off-by: Eric Van Hensbergen --- arch/powerpc/include/asm/ppc-opcode.h

Re: [PATCH 3/7] [RFC] add support for BlueGene/P FPU

On Thu, May 19, 2011 at 12:58 AM, Michael Neuling wrote: > Eric, > >> This patch adds save/restore register support for the BlueGene/P >> double hummer FPU. > > What does this mean?  Needs more details here. > Hi Mikey, any specific details you are looking for here? AFAIK these patches are requ

Re: [PATCH 4/7] [RFC] enable L1_WRITETHROUGH mode for BG/P

On Thu, May 19, 2011 at 5:43 AM, Josh Boyer wrote: > On Wed, May 18, 2011 at 04:24:52PM -0500, Eric Van Hensbergen wrote: >> >>+config L1_WRITETHROUGH >>+      bool "Blue Gene/P enabled writethrough mode" >>+      depends on BGP >>+      default y

Re: [PATCH 1/7] [RFC] Mainline BG/P platform support

On Thu, May 19, 2011 at 6:01 AM, Josh Boyer wrote: > On Wed, May 18, 2011 at 04:24:49PM -0500, Eric Van Hensbergen wrote: >> >>I'll be maintaining the patchset in my kernel.org repository >>(/pub/scm/linux/kernel/git/ericvh/bluegene.git) under the bluegene >>bra

[PATCH 7/7] [RFC] SMP support code

This patch adds the necessary core code to enable SMP support on BlueGene/P Signed-off-by: Eric Van Hensbergen --- arch/powerpc/kernel/head_44x.S | 72 + arch/powerpc/mm/fault.c| 77 arch/powerpc/platforms

[PATCH 5/7] [RFC] force 32-byte aligned kmallocs

For BGP, it is convenient for 'kmalloc' to come back with 32-byte aligned units for torus DMA Signed-off-by: Eric Van Hensbergen --- arch/powerpc/include/asm/page_32.h |2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/arch/powerpc/include/asm/page_32.h b/ar

[PATCH 6/7] [RFC] enable early TLBs for BG/P

BG/P maps firmware with an early TLB Signed-off-by: Eric Van Hensbergen --- arch/powerpc/include/asm/mmu-44x.h |6 +- 1 files changed, 5 insertions(+), 1 deletions(-) diff --git a/arch/powerpc/include/asm/mmu-44x.h b/arch/powerpc/include/asm/mmu-44x.h index ca1b90c..2807d6e 100644

[PATCH 3/7] [RFC] add support for BlueGene/P FPU

This patch adds save/restore register support for the BlueGene/P double hummer FPU. Signed-off-by: Eric Van Hensbergen --- arch/powerpc/include/asm/ppc_asm.h | 39 --- arch/powerpc/kernel/fpu.S |8 +++--- arch/powerpc/platforms/44x/Kconfig |9

[PATCH 4/7] [RFC] enable L1_WRITETHROUGH mode for BG/P

BG/P nodes need to be configured for writethrough to work in SMP configurations. This patch adds the right hooks in the MMU code to make sure L1_WRITETHROUGH configurations are setup for BG/P. Signed-off-by: Eric Van Hensbergen --- arch/powerpc/include/asm/mmu-44x.h |2 ++ arch/powerpc

[PATCH 2/7] [RFC] add bluegene entry to cputable

Signed-off-by: Eric Van Hensbergen --- arch/powerpc/kernel/cputable.c | 14 ++ 1 files changed, 14 insertions(+), 0 deletions(-) diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c index b9602ee..0eb245e 100644 --- a/arch/powerpc/kernel/cputable.c +++ b

[PATCH 1/7] [RFC] Mainline BG/P platform support

ention reviewing these patches. Signed-off-by: Eric Van Hensbergen --- MAINTAINERS |8 1 files changed, 8 insertions(+), 0 deletions(-) diff --git a/MAINTAINERS b/MAINTAINERS index 69f19f1..3ffca88 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -3863,6 +3863,14 @@ S: Maintained F: