The M64 resource should be removed if we don't have hook to
initialize it, or (not and) fail to do that.
Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
The patch checks PHB type a bit early to save a bit cycles
for P7 because we don't support M64 for P7IOC no matter what
OPAL firmware we have.
Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This patch switch the ppc arch to use the generic RCU based
gup implementation.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Update generic gup implementation with powerpc specific details.
On powerpc at pmd level we can have hugepte, normal pmd pointer
or a pointer to the hugepage directory.
Tested-by: Steve Capper <steve.capper@linaro.org>
Acked-by: Steve Capper <steve.capper@linaro.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Firmware is allowed to communicate to us via the "ibm,pa-features" property
that TM (Transactional Memory) support is disabled.
Currently this doesn't happen on any platform we're aware of, but we should
honor it anyway.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
dump_tlb_44x() is only defined when 44x=y, but the ifdef in xmon.c
checks for 4xx, leading to a build failure:
arch/powerpc/xmon/xmon.c:912:4: error: implicit declaration of function 'dump_tlb_44x'
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
In arch/powerpc/include/asm/bitops.h, the comments about bit numbers in
large (> 1 word) bitmaps have two typos:
- On ppc64 system, the LSB of the 4th word should be bit 192 rather than
196, because if it's bit 196, bit 192-195 will be missing in the
bitmap.
- On ppc32 system, the LSB of the second word should be bit 32 rather
than 31, because bit 31 is already in the first word.
This patch fixes these typos.
Signed-off-by: Boqun Feng <boqun.feng@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Recent OPAL firmare adds a couple of functions to send and receive IPMI
messages:
https://github.com/open-power/skiboot/commit/b2a374da
This change updates the token list and wrappers to suit, and adds the
platform devices for any IPMI interfaces.
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Commit be96f63375 ("powerpc: Split out instruction analysis
part of emulate_step()") added some calls to do_fp_load()
and do_fp_store(), which fail to compile on configs with
CONFIG_PPC_FPU=n and CONFIG_PPC_EMULATE_SSTEP=y. This fixes
the compile by adding #ifdef CONFIG_PPC_FPU around the code
that calls these functions.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
The system call FLIH (first-level interrupt handler) at 0xc00
unconditionally sets hardware priority to medium. For hypercalls, this
means we lose guest OS priority. The front end (do_kvm_0x**) to the
KVM interrupt handler always assumes that PPR priority is saved in
PACA exception save area, so it copies this to the kvm_hstate
structure. For hypercalls, this would be the saved priority from any
previous exception. Eventually, the guest gets resumed with an
incorrect priority.
The fix is to save the PPR priority in PACA exception save area before
switching HMT priorities in the FLIH so that existing code described above
in the KVM interrupt handler can copy it from there into the VCPU's saved
context.
Signed-off-by: Suresh Warrier <warrier@linux.vnet.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
[mpe: Dropped HMT_MEDIUM_PPR_DISCARD and reworded comment]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
PAGE_FACTOR was defined to reflect the difference between configured
page size and fixed 4KB page size. Replace (PAGE_SHIFT - HW_PAGE_SHIFT)
with PAGE_FACTOR.
Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
We have some code in udbg_uart_getc_poll() that tries to protect
against a NULL udbg_uart_in, but gets it all wrong.
Found with the LLVM static analyzer (scan-build).
Fixes: 309257484c ("powerpc: Cleanup udbg_16550 and add support for LPC PIO-only UARTs")
Signed-off-by: Anton Blanchard <anton@samba.org>
[mpe: Add some newlines for readability while we're here]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Simplify the error path to avoid calling of_node_put when it is not needed.
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Of_node_put supports NULL as its argument, so the initial test is not
necessary.
Suggested by Uwe Kleine-König.
The semantic patch that fixes this problem is as follows:
(http://coccinelle.lip6.fr/)
// <smpl>
@@
expression e;
@@
-if (e)
of_node_put(e);
// </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Of_node_put supports NULL as its argument, so the initial test is not
necessary.
Suggested by Uwe Kleine-König.
The semantic patch that fixes this problem is as follows:
(http://coccinelle.lip6.fr/)
// <smpl>
@@
expression e;
@@
-if (e)
of_node_put(e);
// </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Of_node_put supports NULL as its argument, so the initial test is not
necessary.
Suggested by Uwe Kleine-König.
The semantic patch that fixes this problem is as follows:
(http://coccinelle.lip6.fr/)
// <smpl>
@@
expression e;
@@
-if (e)
of_node_put(e);
// </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Simplify the error path to avoid calling of_node_put when it is not needed.
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
The H_SET_MODE hcall returns H_P2 if a function is not implemented
and all callers should handle this case.
The call to enable relocation on exceptions currently prints an error
message if the feature is not implemented. While H_SET_MODE was
first introduced on POWER8 (which has relocation on exceptions), it
has been now added on some POWER7 configurations (which does not).
Check for H_P2 and print an informational message instead.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
The ibm,pcie-link-speed-stats isn't mandatory, so we shouldn't print
a high priority error message when missing. One example where we see
this is QEMU.
Reduce it to pr_debug.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Looks like I introduced this when adding LE support.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
LLVM doesn't support local named register variables and is unlikely
to. current_thread_info is using one, fix it by moving it out and
calling it __current_r1().
I gave it a bit of an obscure name because we don't want anyone else
using it - they should use current_stack_pointer(). This specific
case is performance critical and we can't afford to call a function
to get it. Furthermore it isn't important to know exactly where in
the stack we are since we mask the lower bits.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
The build is broken with CONFIG_PPC32=y, CONFIG_FB_VGA16=y and
CONFIG_VGA_CONSOLE=n.
The problem is that vgacon_remap_base is not defined. It's used in:
#define VGA_MAP_MEM(x,s) (x + vgacon_remap_base)
Which is used in the vga16fb.c code.
Digging down it seems vgacon_remap_base is never initialised. It used to
be, back in arch/ppc (pplus.c and prep_setup.c), but none of that code
ever made it to arch/powerpc.
So given it's been unused for >6 years, remove it.
Whether vga16fb.c works on 32-bit is another question, but this patch
shouldn't affect it.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Commit d4fe0965e2 ("powerpc/jump_label: use HAVE_JUMP_LABEL?")
missed a few conversions. Change the remaining uses of
CONFIG_JUMP_LABEL to HAVE_JUMP_LABEL.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
On some platforms a 5 second timeout during boot might be quite long, so
make it configurable. Run the loop at least once to let the user stop
the boot by holding a key pressed. If the timeout is set to 0, don't
wait for input, which can be used as a workaround if the boot hangs on
random data coming in on the serial port.
Signed-off-by: Simon Kagstrom <simon.kagstrom@netinsight.net>
[mpe: Changelog wording & whitespace]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
In commit fb5a515704 "Remove platforms/wsp and associated pieces" we
removed the last user of CPU_FTRS_A2, so we should remove it too.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
We potentially clear CPU_FTR_HVMODE at runtime in __init_hvmode_206(),
so we must make sure it's not set in CPU_FTRS_ALWAYS.
This doesn't hurt us in practice at the moment, because we don't support
compiling only for CPUs that support CPU_FTR_HVMODE.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
CONFIG_MCOUNT is not defined anymore, the corresponding #ifdef there
is CONFIG_FUNCTION_TRACER.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Added in 2008, but has never had any in-tree users, and no other
architectures provide it.
Signed-off-by: Kyle McMartin <kyle@redhat.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Instead of passing in the stack address of the link register
to be modified, just pass in the old value and return the
new value and rely on ftrace_graph_caller to do the
modification.
This removes the exception handling around the stack update -
it isn't needed and we weren't consistent about it. Later on
we would do an unprotected modification:
if (!ftrace_graph_entry(&trace)) {
*parent = old;
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
mod_return_to_handler is the same as return_to_handler, except
it handles the change of the TOC (r2). Add this into
return_to_handler and remove mod_return_to_handler.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
I'm seeing a build warning in mm/nobootmem.c after removing
bootmem:
mm/nobootmem.c: In function '__free_pages_memory':
include/linux/kernel.h:713:17: warning: comparison of distinct pointer types lacks a cast [enabled by default]
(void) (&_min1 == &_min2); \
^
mm/nobootmem.c:90:11: note: in expansion of macro 'min'
order = min(MAX_ORDER - 1UL, __ffs(start));
^
The rest of the worlds seems to define __ffs as returning unsigned long,
so lets do that.
Signed-off-by: Anton Blanchard <anton@samba.org>
Tested-by: Emil Medve <Emilian.Medve@Freescale.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
We did part of sparse initialisation in setup_arch and part in
initmem_init. Put them together.
Signed-off-by: Anton Blanchard <anton@samba.org>
Tested-by: Emil Medve <Emilian.Medve@Freescale.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Lots of places included bootmem.h even when not using bootmem.
Signed-off-by: Anton Blanchard <anton@samba.org>
Tested-by: Emil Medve <Emilian.Medve@Freescale.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Now bootmem is gone from powerpc we can remove comments mentioning it.
Signed-off-by: Anton Blanchard <anton@samba.org>
Tested-by: Emil Medve <Emilian.Medve@Freescale.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
At the moment we transition from the memblock alloctor to the bootmem
allocator. Gitting rid of the bootmem allocator removes a bunch of
complicated code (most of which I owe the dubious honour of being
responsible for writing).
Signed-off-by: Anton Blanchard <anton@samba.org>
Tested-by: Emil Medve <Emilian.Medve@Freescale.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
We have an extra level of indirection on memory hot remove which is not
matched on memory hot add. Memory hotplug is book3s only, so there is
no need for it.
This also enables means remove_memory() (ie memory hot unplug) works
on powernv.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
ppc64_boot_msg is meant to be a boot debug aid, but
is only used in one spot. Get rid of it, and save
ourseleves a couple of lines in the kernel log
buffer.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Newer POWER designs do not implement PCI I/O space, so we
expect to see a number of these.
Reduce the severity of the warning so it doesn't mask other
real issues.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
We really don't want to take a pagefault in show_instructions,
so use probe_kernel_address instead of __get_user.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Pull powerpc fixes from Michael Ellerman:
"Some more powerpc fixes if you please"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux:
powerpc: use device_online/offline() instead of cpu_up/down()
powerpc/powernv: Properly fix LPC debugfs endianness
powerpc: do_notify_resume can be called with bad thread_info flags argument
powerpc/fadump: Fix endianess issues in firmware assisted dump handling
powerpc: Fix section mismatch warning
Pull m68k update from Geert Uytterhoeven.
Just wiring up the bpf system call.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k:
m68k: Wire up bpf
A surprisingly small batch of fixes for -rc3. Suspiciously small, I'd say.
Anyway, most of this are a few defconfig updates. Some for omap to deal
with kernel binary size (moving ipv6 to module, etc). A larger one for
socfpga that refreshes with some churn, but also turns on a few options
that makes the newly-added board in my bootfarm usable for testing.
OMAP3 will also now warn when booted with legacy (non-DT) boot protocols,
hopefully encouraging those who still care about some of those platforms
to submit DT support and report bugs where needed. Nothing stops working
though, this is just to warn for future deprecation.
Beyond this, very few actual bugfixes. A PXA fix for DEBUG_LL boot hangs,
a missing terminting entry in a dt_match array on RealView a MTD fix on
OMAP with NAND.
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Merge tag 'armsoc-for-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Olof Johansson:
"A surprisingly small batch of fixes for -rc3. Suspiciously small, I'd
say.
Anyway, most of this are a few defconfig updates. Some for omap to
deal with kernel binary size (moving ipv6 to module, etc). A larger
one for socfpga that refreshes with some churn, but also turns on a
few options that makes the newly-added board in my bootfarm usable for
testing.
OMAP3 will also now warn when booted with legacy (non-DT) boot
protocols, hopefully encouraging those who still care about some of
those platforms to submit DT support and report bugs where needed.
Nothing stops working though, this is just to warn for future
deprecation.
Beyond this, very few actual bugfixes. A PXA fix for DEBUG_LL boot
hangs, a missing terminting entry in a dt_match array on RealView a
MTD fix on OMAP with NAND"
[ Obviously missed rc3, will make rc4 instead ;) ]
* tag 'armsoc-for-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
MAINTAINERS: drop list entry for davinci
ARM: OMAP2+: Warn about deprecated legacy booting mode
ARM: omap2plus_defconfig: Fix errors with NAND BCH
ARM: multi_v7_defconfig: fix support for APQ8084
soc: versatile: Add terminating entry for realview_soc_of_match
ARM: ixp4xx: remove compilation warnings in io.h
MAINTAINERS: Add Soren as reviewer for Zynq
ARM: omap2plus_defconfig: Fix bloat caused by having ipv6 built-in
ARM: socfpga_defconfig: Update defconfig for SoCFPGA
ARM: pxa: fix hang on startup with DEBUG_LL
The generic Linux framework to power off the machine is a function pointer
called pm_power_off. The trick about this pointer is that device drivers can
potentially implement it rather than board files.
Today on powerpc we set pm_power_off to invoke our generic full machine power
off logic which then calls ppc_md.power_off to invoke machine specific power
off.
However, when we want to add a power off GPIO via the "gpio-poweroff" driver,
this card house falls apart. That driver only registers itself if pm_power_off
is NULL to ensure it doesn't override board specific logic. However, since we
always set pm_power_off to the generic power off logic (which will just not
power off the machine if no ppc_md.power_off call is implemented), we can't
implement power off via the generic GPIO power off driver.
To fix this up, let's get rid of the ppc_md.power_off logic and just always use
pm_power_off as was intended. Then individual drivers such as the GPIO power off
driver can implement power off logic via that function pointer.
With this patch set applied and a few patches on top of QEMU that implement a
power off GPIO on the virt e500 machine, I can successfully turn off my virtual
machine after halt.
Signed-off-by: Alexander Graf <agraf@suse.de>
[mpe: Squash into one patch and update changelog based on cover letter]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This still has not been merged and now powerpc is the only arch that does
not have this change. Sorry about missing linuxppc-dev before.
V2->V2
- Fix up to work against 3.18-rc1
__get_cpu_var() is used for multiple purposes in the kernel source. One of
them is address calculation via the form &__get_cpu_var(x). This calculates
the address for the instance of the percpu variable of the current processor
based on an offset.
Other use cases are for storing and retrieving data from the current
processors percpu area. __get_cpu_var() can be used as an lvalue when
writing data or on the right side of an assignment.
__get_cpu_var() is defined as :
__get_cpu_var() always only does an address determination. However, store
and retrieve operations could use a segment prefix (or global register on
other platforms) to avoid the address calculation.
this_cpu_write() and this_cpu_read() can directly take an offset into a
percpu area and use optimized assembly code to read and write per cpu
variables.
This patch converts __get_cpu_var into either an explicit address
calculation using this_cpu_ptr() or into a use of this_cpu operations that
use the offset. Thereby address calculations are avoided and less registers
are used when code is generated.
At the end of the patch set all uses of __get_cpu_var have been removed so
the macro is removed too.
The patch set includes passes over all arches as well. Once these operations
are used throughout then specialized macros can be defined in non -x86
arches as well in order to optimize per cpu access by f.e. using a global
register that may be set to the per cpu base.
Transformations done to __get_cpu_var()
1. Determine the address of the percpu instance of the current processor.
DEFINE_PER_CPU(int, y);
int *x = &__get_cpu_var(y);
Converts to
int *x = this_cpu_ptr(&y);
2. Same as #1 but this time an array structure is involved.
DEFINE_PER_CPU(int, y[20]);
int *x = __get_cpu_var(y);
Converts to
int *x = this_cpu_ptr(y);
3. Retrieve the content of the current processors instance of a per cpu
variable.
DEFINE_PER_CPU(int, y);
int x = __get_cpu_var(y)
Converts to
int x = __this_cpu_read(y);
4. Retrieve the content of a percpu struct
DEFINE_PER_CPU(struct mystruct, y);
struct mystruct x = __get_cpu_var(y);
Converts to
memcpy(&x, this_cpu_ptr(&y), sizeof(x));
5. Assignment to a per cpu variable
DEFINE_PER_CPU(int, y)
__get_cpu_var(y) = x;
Converts to
__this_cpu_write(y, x);
6. Increment/Decrement etc of a per cpu variable
DEFINE_PER_CPU(int, y);
__get_cpu_var(y)++
Converts to
__this_cpu_inc(y)
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: Paul Mackerras <paulus@samba.org>
Signed-off-by: Christoph Lameter <cl@linux.com>
[mpe: Fix build errors caused by set/or_softirq_pending(), and rework
assignment in __set_breakpoint() to use memcpy().]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
produce errors when booted with omap2plus_defconfig, and
reduce bloat by making IPV6 a loadable module.
Also let's add a warning about legacy boot being deprecated
for omap3.
We now have things working with device tree, and only omap3 is
still booting in legacy mode. So hopefully this warning will
help move the remaining legacy mode users to boot with device
tree.
As the total reduction of code and static data is somewhere
around 20000 lines of code once we remove omap3 legacy mode
booting, we really do want to make omap3 to boot also in
device tree mode only over the next few merge cycles.
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Merge tag 'fixes-against-v3.18-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into fixes
Merge "omap fixes against v3.18-rc2" from Tony Lindgren:
Few fixes for omaps to enable NAND BCH so devices won't
produce errors when booted with omap2plus_defconfig, and
reduce bloat by making IPV6 a loadable module.
Also let's add a warning about legacy boot being deprecated
for omap3.
We now have things working with device tree, and only omap3 is
still booting in legacy mode. So hopefully this warning will
help move the remaining legacy mode users to boot with device
tree.
As the total reduction of code and static data is somewhere
around 20000 lines of code once we remove omap3 legacy mode
booting, we really do want to make omap3 to boot also in
device tree mode only over the next few merge cycles.
* tag 'fixes-against-v3.18-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap: (407 commits)
ARM: OMAP2+: Warn about deprecated legacy booting mode
ARM: omap2plus_defconfig: Fix errors with NAND BCH
ARM: omap2plus_defconfig: Fix bloat caused by having ipv6 built-in
+ Linux 3.18-rc2
Signed-off-by: Olof Johansson <olof@lixom.net>
Gavin Shan