Currently we allocate the stale_map for a cpu when it comes online,
this leaves open a small window where a process can be scheduled
on the cpu before the stale_map is allocated. Instead allocate
the stale_map at CPU_UP_PREPARE time, that way it will be always
available before tasks start running.
On Tue, 2011-04-05 at 08:47 +0200, Segher Boessenkool wrote:
> Hi Ben,
>
> > + case 'd':
> > + ++q;
> > + vs = va_arg(args, long);
>
> 'd' takes an int, not a long.
Oops :-) Indeed ... copy/lpaste bogon I think
> > + if (vs < 0) {
> Why? of_get_property() returns NULL if np is NULL, implemented in
> of_find_property(). It doesn't look like a fast path.
Fun... not sure, I though I had a problem but maybe I don't remember
properly :-)
Cheers,
Ben.
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On Tue, 2011-04-05 at 16:30 +1000, Michael Neuling wrote:
> In message <1301984051-18413-5-git-send-email-b...@kernel.crashing.org> you
> wrote:
> > This bit indicates that we are operating in hypervisor mode on a CPU
> > compliant to architecture 2.06 or later (currently server only).
> >
> > We
Hi Ben,
> + case 'd':
> + ++q;
> + vs = va_arg(args, long);
'd' takes an int, not a long.
> + if (vs < 0) {
> + prom_print("-");
RELOC()?
Segher
___
On Mon, Apr 4, 2011 at 11:24 PM, Michael Ellerman
wrote:
> In access_process_vm() we need to check that we have found the right
> vma, not the following vma, before we try to access it. Otherwise
> we might call the vma's access routine with an address which does
> not fall inside the vma.
>
> Sig
> > The benefit is that all archs now get the matching for free. There's one
> > hook the arch might want to provide to match a PHB bus to its device
> > node. A default weak implementation is provided that looks for the
> > parent device device node, but it's not entirely reliable on powerpc for
On Tue, 2011-04-05 at 16:13 +1000, Benjamin Herrenschmidt wrote:
> Signed-off-by: Benjamin Herrenschmidt
> ---
> arch/powerpc/kernel/rtas.c |2 ++
> 1 files changed, 2 insertions(+), 0 deletions(-)
>
> diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
> index 2097f2b..c2bf
In message <1301984051-18413-5-git-send-email-b...@kernel.crashing.org> you
wrote:
> This bit indicates that we are operating in hypervisor mode on a CPU
> compliant to architecture 2.06 or later (currently server only).
>
> We set it on POWER7 and have a boot-time CPU setup function that
> clear
Currently we allocate the stale_map for a cpu when it comes online,
this leaves open a small window where a process can be scheduled
on the cpu before the stale_map is allocated. Instead allocate
the stale_map at CPU_UP_PREPARE time, that way it will be always
available before tasks start running.
The calculation of the size for the exception save area of the TLB
miss handler is wrong, luckily it's too big not too small.
Rework it to make it a bit clearer, and also correct. We want 3 save
areas, each EX_TLB_SIZE _bytes_.
Signed-off-by: Michael Ellerman
---
arch/powerpc/include/asm/paca.h
In access_process_vm() we need to check that we have found the right
vma, not the following vma, before we try to access it. Otherwise
we might call the vma's access routine with an address which does
not fall inside the vma.
Signed-off-by: Michael Ellerman
---
mm/memory.c |2 +-
1 files cha
On Mar 31, 2011, at 2:01 AM, Prabhakar Kushwaha wrote:
> PCIe nodes with the property status="disabled" are not usable and so
> avoid adding "disabled" PCIe bridge with the system.
>
> Signed-off-by: Prabhakar Kushwaha
> Acked-by: Kumar Gala
> ---
> Based upon
> git://git.kernel.org/pub/scm/l
This bit indicates that we are operating in hypervisor mode on a CPU
compliant to architecture 2.06 or later (currently server only).
We set it on POWER7 and have a boot-time CPU setup function that
clears it if MSR:HV isn't set (booting under a hypervisor).
Signed-off-by: Benjamin Herrenschmidt
We need to do that to guarantee they see any code change done by
dynamic patching during boot.
Signed-off-by: Benjamin Herrenschmidt
---
arch/powerpc/kernel/head_64.S |2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/hea
From: Paul Mackerras
This uses feature sections to arrange that we always use HSPRG1
as the scratch register in the interrupt entry code rather than
SPRG2 when we're running in hypervisor mode on POWER7. This will
ensure that we don't trash the guest's SPRG2 when we are running
KVM guests. To s
Adds the ability to print decimal numbers and adds some more
format string variants
Signed-off-by: Benjamin Herrenschmidt
---
arch/powerpc/kernel/prom_init.c | 26 +-
1 files changed, 25 insertions(+), 1 deletions(-)
diff --git a/arch/powerpc/kernel/prom_init.c b/arch/
Wakeup comes from the system reset handler with a potential loss of
the non-hypervisor CPU state. We save the non-volatile state on the
stack and a pointer to it in the PACA, which the system reset handler
uses to restore things
Signed-off-by: Benjamin Herrenschmidt
---
arch/powerpc/include/asm/
We do it before we loop on the PACA start flag. This way, we get a
chance to set critical SPRs on all CPUs before Linux tries to start
them up, which avoids problems when changing some bits such as LPCR
bits that need to be identical on all threads of a core or similar
things like that. Ideally, so
In case entry from the bootloader isn't "clean"
Signed-off-by: Benjamin Herrenschmidt
---
arch/powerpc/kernel/cpu_setup_power7.S | 18 ++
1 files changed, 18 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/kernel/cpu_setup_power7.S
b/arch/powerpc/kernel/cpu_setup_powe
Pass the register type to the prolog, also provides alternate "HV"
version of hardware interrupt (0x500) and adjust LPES accordingly
We tag those interrupts by setting bit 0x2 in the trap number
Signed-off-by: Benjamin Herrenschmidt
---
arch/powerpc/include/asm/exception-64s.h | 65
We need to wait a bit for them to have done their CPU setup
or we might end up with translation and EE on with different
LPCR values between threads
Signed-off-by: Benjamin Herrenschmidt
---
arch/powerpc/include/asm/smp.h |1 +
arch/powerpc/kernel/head_64.S | 18 +-
arch/p
This sets the default data stream prefetch size for operating
systems that don't set their own value in DSCR. We use 4 which
is "medium".
Signed-off-by: Benjamin Herrenschmidt
---
arch/powerpc/kernel/cpu_setup_power7.S |7 +++
1 files changed, 7 insertions(+), 0 deletions(-)
diff --git
Even when nothing is specified in the device tree, and despite the
fact that we don't setup links properly yet, we still need a reasonable
value in there or some interrupts won't be setup properly to point to
an existing processor.
Signed-off-by: Benjamin Herrenschmidt
---
arch/powerpc/sysdev/xi
Rework exception macros a bit to split offset from vector and add
some basic support for HDEC, HDSI, HISI and a few more.
Signed-off-by: Benjamin Herrenschmidt
---
arch/powerpc/include/asm/exception-64s.h | 37
arch/powerpc/include/asm/feature-fixups.h |2 +-
arch/powerpc/ker
When running in Hypervisor mode (arch 2.06 or later), we store the PACA
in HSPRG0 instead of SPRG1. The architecture specifies that SPRGs may be
lost during a "nap" power management operation (though they aren't
currently on POWER7) and this enables use of SPRG1 by KVM guests.
Signed-off-by: Benja
Signed-off-by: Benjamin Herrenschmidt
---
arch/powerpc/kernel/rtas.c |2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
index 2097f2b..c2bfc4d 100644
--- a/arch/powerpc/kernel/rtas.c
+++ b/arch/powerpc/kernel/rtas.c
@@
This adds more SPR definitions used on newer processors when running
in hypervisor mode. Along with some other P7 specific bits and pieces
Signed-off-by: Benjamin Herrenschmidt
---
arch/powerpc/include/asm/ppc_asm.h |1 +
arch/powerpc/include/asm/reg.h | 46
Here's a patch series which adds bits and pieces (and in some case
not directly related cleanups that will be useful for the upcoming
platform that uses that stuff) to allow running a recent CPU in
hypervisor mode.
It applies on top of the few cleanups and the XICS rewrite I've
already posted and
The following changes since commit c0bb9e45f3a7f67fc358946727bc3d5f23d0f55d:
kdump: Allow shrinking of kdump region to be overridden (2011-04-01 16:14:30
+1100)
are available in the git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/galak/powerpc.git merge
Kumar Gala (1):
On Mon, Apr 04, 2011 at 05:37:44PM +1000, Benjamin Herrenschmidt wrote:
>
> > Nice, looks like I forgot to add the new drivers/pci/of.c file :-)
> > Here's a new patch. Also added linux-pci to the CC list.
>
> And this one removes a lot more cruft from the powermac code while at
> it, and moves t
On Mon, 2011-04-04 at 09:25 -0600, Bjorn Helgaas wrote:
> Some of this is reminiscent of the ACPI/PCI binding we do on x86/ia64,
> e.g., acpi_get_pci_dev() and the stuff in drivers/acpi/glue.c. Have
> you looked at that to see if there's any hope of covering both OF and
> ACPI with something more
Hi,
I've had the following funny crashes on PPC machines, with
cataleptic X server as a consequence:
kernel: [drm] Setting GART location based on new memory map
kernel: Oops: Exception in kernel mode, sig: 4 [#1]
kernel: CHRP
kernel: last sysfs file: /sys/devices/pci0001:01/0001:01:08.0/r
Gabriel Paubert writes:
>
> Ok, I got fed up about it. The patch referred above is obviously wrong since
> it leaves interrupts at 0 when a device_type or name of 8042 is found,
> so what about the following?
Looks like the workaround I was using for a while.
In the original report I said I was
On Tue, Apr 05, 2011 at 08:28:50AM +1000, Benjamin Herrenschmidt wrote:
>
> > Ok, I got fed up about it. The patch referred above is obviously wrong since
> > it leaves interrupts at 0 when a device_type or name of 8042 is found,
> > so what about the following?
> >
> > I can ship it with a sign
On Sun, Oct 10, 2010 at 06:35:47PM +1100, Benjamin Herrenschmidt wrote:
> On Sat, 2010-10-09 at 20:37 -0500, pac...@kosh.dhis.org wrote:
> > Pegasos has no keyboard again. I blame commit
> > 540c6c392f01887dcc96bef0a41e63e6c1334f01, which tries to find i8042 IRQs in
> > the device-tree but doesn't
> Ok, I got fed up about it. The patch referred above is obviously wrong since
> it leaves interrupts at 0 when a device_type or name of 8042 is found,
> so what about the following?
>
> I can ship it with a signed-off-by and proper comments a bit later if people
> agree.
>
> Compiled and test
On Mon, 2011-04-04 at 09:25 -0600, Bjorn Helgaas wrote:
>
> Some of this is reminiscent of the ACPI/PCI binding we do on x86/ia64,
> e.g., acpi_get_pci_dev() and the stuff in drivers/acpi/glue.c. Have
> you looked at that to see if there's any hope of covering both OF and
> ACPI with something mo
From: Benjamin Herrenschmidt
Date: Tue, 05 Apr 2011 07:03:17 +1000
> On Mon, 2011-04-04 at 00:48 -0700, David Miller wrote:
>> From: Benjamin Herrenschmidt
>> Date: Mon, 04 Apr 2011 13:27:10 +1000
>>
>> > +struct device_node * __weak pcibios_get_phb_of_node(struct pci_bus *bus)
>> > +{
>> > +
On Mon, 2011-04-04 at 00:48 -0700, David Miller wrote:
> From: Benjamin Herrenschmidt
> Date: Mon, 04 Apr 2011 13:27:10 +1000
>
> > +struct device_node * __weak pcibios_get_phb_of_node(struct pci_bus *bus)
> > +{
> > + /* This should only be called for PHBs */
> > + if (WARN_ON(bus->self || b
On Sun, Apr 03, 2011 at 06:22:13PM -0500, Ayman El-Khashab wrote:
>
> On Sun, Apr 03, 2011 at 04:09:26PM -0600, Grant Likely wrote:
> > On Sun, Apr 3, 2011 at 3:52 PM, Benjamin Herrenschmidt
> > wrote:
> > >
> > >> Ok, I've narrowed the scope of the problem some. ?I moved forward
> > >> to a more
On Mon, Apr 4, 2011 at 1:37 AM, Benjamin Herrenschmidt
wrote:
> powerpc has two different ways of matching PCI devices to their
> corresponding OF node (if any) for historical reasons. The ppc64 one
> does a scan looking for matching bus/dev/fn, while the ppc32 one does a
> scan looking only for
On Sun, Apr 03, 2011 at 04:17:13PM -0700, tma...@apm.com wrote:
> +void start_next_request(struct pcd_ep *ep)
this will probably cause namespace clashes at some point. prepent with
dwc_ or make it static.
--
balbi
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On Sun, Apr 03, 2011 at 04:17:24PM -0700, tma...@apm.com wrote:
> From: Tirumala Marri
>
> Add Synopsys DesignWare HS USB OTG driver kernel configuration.
> Synopsys OTG driver may operate in host only, device only, or OTG mode.
> The driver also allows user configure the core to use its interna
Hi,
On Sun, Apr 03, 2011 at 04:17:10PM -0700, tma...@apm.com wrote:
> +static const struct usb_gadget_ops dwc_otg_pcd_ops = {
> + .get_frame = dwc_otg_pcd_get_frame,
> + .wakeup = dwc_otg_pcd_wakeup,
> + /* not selfpowered */
will you really have a board running this top operating sys
Hi,
On Sun, Apr 03, 2011 at 04:16:53PM -0700, tma...@apm.com wrote:
> +const char *op_state_str(enum usb_otg_state state)
please don't introduce yet another version of this. Make the ones
available generic. Place a static inline const char
*otg_state_string(struct otg_transceiver *x) on include/l
On Sun, Apr 03, 2011 at 04:16:50PM -0700, tma...@apm.com wrote:
> From: Tirumala Marri
>
> Platform probing is in dwc_otg_apmppc.c.
> Driver parameter and parameter checking are in dwc_otg_param.c.
>
> Signed-off-by: Tirumala R Marri
> Signed-off-by: Fushen Chen
> Signed-off-by: Mark Miesfeld
From: Benjamin Herrenschmidt
Date: Mon, 04 Apr 2011 13:27:10 +1000
> +struct device_node * __weak pcibios_get_phb_of_node(struct pci_bus *bus)
> +{
> + /* This should only be called for PHBs */
> + if (WARN_ON(bus->self || bus->parent))
> + return NULL;
This WARN_ON() will al
> Nice, looks like I forgot to add the new drivers/pci/of.c file :-)
> Here's a new patch. Also added linux-pci to the CC list.
And this one removes a lot more cruft from the powermac code while at
it, and moves the core matching logic to drivers/of/of_pci.c...
>From 917ea61d6afcf443ca467d0a6ffa
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