Patch queue for ppc - 2014-08-01
Highlights in this release include:
- BookE: Rework instruction fetch, not racy anymore now
- BookE HV: Fix ONE_REG accessors for some in-hardware registers
- Book3S: Good number of LE host fixes, enable HV on LE
- Book3S: Some misc bug fixes
- Book3S HV: Add in-guest debug support
- Book3S HV: Preload cache lines on context switch
- Remove 440 support
Alexander Graf (31):
KVM: PPC: Book3s PR: Disable AIL mode with OPAL
KVM: PPC: Book3s HV: Fix tlbie compile error
KVM: PPC: Book3S PR: Handle hyp doorbell exits
KVM: PPC: Book3S PR: Fix ABIv2 on LE
KVM: PPC: Book3S PR: Fix sparse endian checks
PPC: Add asm helpers for BE 32bit load/store
KVM: PPC: Book3S HV: Make HTAB code LE host aware
KVM: PPC: Book3S HV: Access guest VPA in BE
KVM: PPC: Book3S HV: Access host lppaca and shadow slb in BE
KVM: PPC: Book3S HV: Access XICS in BE
KVM: PPC: Book3S HV: Fix ABIv2 on LE
KVM: PPC: Book3S HV: Enable for little endian hosts
KVM: PPC: Book3S: Move vcore definition to end of kvm_arch struct
KVM: PPC: Deflect page write faults properly in kvmppc_st
KVM: PPC: Book3S: Stop PTE lookup on write errors
KVM: PPC: Book3S: Add hack for split real mode
KVM: PPC: Book3S: Make magic page properly 4k mappable
KVM: PPC: Remove 440 support
KVM: Rename and add argument to check_extension
KVM: Allow KVM_CHECK_EXTENSION on the vm fd
KVM: PPC: Book3S: Provide different CAPs based on HV or PR mode
KVM: PPC: Implement kvmppc_xlate for all targets
KVM: PPC: Move kvmppc_ld/st to common code
KVM: PPC: Remove kvmppc_bad_hva()
KVM: PPC: Use kvm_read_guest in kvmppc_ld
KVM: PPC: Handle magic page in kvmppc_ld/st
KVM: PPC: Separate loadstore emulation from priv emulation
KVM: PPC: Expose helper functions for data/inst faults
KVM: PPC: Remove DCR handling
KVM: PPC: HV: Remove generic instruction emulation
KVM: PPC: PR: Handle FSCR feature deselects
Alexey Kardashevskiy (1):
KVM: PPC: Book3S: Fix LPCR one_reg interface
Aneesh Kumar K.V (4):
KVM: PPC: BOOK3S: PR: Fix PURR and SPURR emulation
KVM: PPC: BOOK3S: PR: Emulate virtual timebase register
KVM: PPC: BOOK3S: PR: Emulate instruction counter
KVM: PPC: BOOK3S: HV: Update compute_tlbie_rb to handle 16MB base page
Anton Blanchard (2):
KVM: PPC: Book3S HV: Fix ABIv2 indirect branch issue
KVM: PPC: Assembly functions exported to modules need _GLOBAL_TOC()
Bharat Bhushan (10):
kvm: ppc: bookehv: Added wrapper macros for shadow registers
kvm: ppc: booke: Use the shared struct helpers of SRR0 and SRR1
kvm: ppc: booke: Use the shared struct helpers of SPRN_DEAR
kvm: ppc: booke: Add shared struct helpers of SPRN_ESR
kvm: ppc: booke: Use the shared struct helpers for SPRN_SPRG0-7
kvm: ppc: Add SPRN_EPR get helper function
kvm: ppc: bookehv: Save restore SPRN_SPRG9 on guest entry exit
KVM: PPC: Booke-hv: Add one reg interface for SPRG9
KVM: PPC: Remove comment saying SPRG1 is used for vcpu pointer
KVM: PPC: BOOKEHV: rename e500hv_spr to bookehv_spr
Michael Neuling (1):
KVM: PPC: Book3S HV: Add H_SET_MODE hcall handling
Mihai Caraman (8):
KVM: PPC: e500mc: Enhance tlb invalidation condition on vcpu schedule
KVM: PPC: e500: Fix default tlb for victim hint
KVM: PPC: e500: Emulate power management control SPR
KVM: PPC: e500mc: Revert "add load inst fixup"
KVM: PPC: Book3e: Add TLBSEL/TSIZE defines for MAS0/1
KVM: PPC: Book3s: Remove kvmppc_read_inst() function
KVM: PPC: Allow kvmppc_get_last_inst() to fail
KVM: PPC: Bookehv: Get vcpu's last instruction for emulation
Paul Mackerras (4):
KVM: PPC: Book3S: Controls for in-kernel sPAPR hypercall handling
KVM: PPC: Book3S: Allow only implemented hcalls to be enabled or disabled
KVM: PPC: Book3S PR: Take SRCU read lock around RTAS kvm_read_guest() call
KVM: PPC: Book3S: Make kvmppc_ld return a more accurate error indication
Stewart Smith (2):
Split out struct kvmppc_vcore creation to separate function
Use the POWER8 Micro Partition Prefetch Engine in KVM HV on POWER8
Conflicts:
Documentation/virtual/kvm/api.txt
The 440 target hasn't been properly functioning for a few releases and
before I was the only one who fixes a very serious bug that indicates to
me that nobody used it before either.
Furthermore KVM on 440 is slow to the extent of unusable.
We don't have to carry along completely unused code. Remove 440 and give
us one less thing to worry about.
Signed-off-by: Alexander Graf <agraf@suse.de>
In commit 27f4488872 "Add OPAL takeover from PowerVM" we added support
for "takeover" on OPAL v1 machines.
This was a mode of operation where we would boot under pHyp, and query
for the presence of OPAL. If detected we would then do a special
sequence to take over the machine, and the kernel would end up running
in hypervisor mode.
OPAL v1 was never a supported product, and was never shipped outside
IBM. As far as we know no one is still using it.
Newer versions of OPAL do not use the takeover mechanism. Although the
query for OPAL should be harmless on machines with newer OPAL, we have
seen a machine where it causes a crash in Open Firmware.
The code in early_init_devtree() to copy boot_command_line into cmd_line
was added in commit 817c21ad9a "Get kernel command line accross OPAL
takeover", and AFAIK is only used by takeover, so should also be
removed.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
__attribute__ ((unused))
WSP is the last user of CONFIG_PPC_A2, so we remove that as well.
Although CONFIG_PPC_ICSWX still exists, it's no longer selectable for
any Book3E platform, so we can remove the code in mmu-book3e.h that
depended on it.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Merge Kconfig menu diet patches from Dave Hansen:
"I think the "Kernel Hacking" menu has gotten a bit out of hand. It is
over 120 lines long on my system with everything enabled and options
are scattered around it haphazardly.
http://sr71.net/~dave/linux/kconfig-horror.png
Let's try to introduce some sanity. This set takes that 120 lines
down to 55 and makes it vastly easier to find some things. It's a
start.
This set stands on its own, but there is plenty of room for follow-up
patches. The arch-specific debug options still end up getting stuck
in the top-level "kernel hacking" menu. OPTIMIZE_INLINING, for
instance, could obviously go in to the "compiler options" menu, but
the fact that it is defined in arch/ in a separate Kconfig file keeps
it on its own for the moment.
The Signed-off-by's in here look funky. I changed employers while
working on this set, so I have signoffs from both email addresses"
* emailed patches from Dave Hansen <dave@sr71.net>:
hang and lockup detection menu
kconfig: consolidate printk options
group locking debugging options
consolidate compilation option configs
consolidate runtime testing configs
order memory debugging Kconfig options
consolidate per-arch stack overflow debugging options
This patch adds a new udbg early debug console which utilises
statically defined input and output buffers stored within the kernel
BSS. It is primarily designed to assist with bring up of new hardware
which may not have a working console but which has a method of
reading/writing kernel memory.
This version incorporates comments made by Ben H (thanks!).
Changes from v1:
- Add memory barriers.
- Ensure updating of read/write positions is atomic.
Signed-off-by: Alistair Popple <alistair@popple.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Add the ability to inject IOMMU faults. We enable this per device
via a fail_iommu sysfs property, similar to fault injection on other
subsystems.
An example:
...
0003:01:00.1 Ethernet controller: Emulex Corporation OneConnect 10Gb NIC (be3) (rev 02)
To inject one error to this device:
echo 1 > /sys/bus/pci/devices/0003:01:00.1/fail_iommu
echo 1 > /sys/kernel/debug/fail_iommu/probability
echo 1 > /sys/kernel/debug/fail_iommu/times
As feared, the first failure injected on the be3 results in an
unrecoverable error, taking down both functions of the card
permanently:
be2net 0003:01:00.1: Unrecoverable error in the card
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
The debugfs code is really generic for all platforms. This patch removes the
powerpc-specific directory reference and makes it available to all
architectures.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
After this, we can remove the legacy iSeries code more easily.
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
As described in the help text in the patch, this token restricts general
access to /dev/mem as a way of increasing the security. Specifically, access
to exclusive IOMEM and kernel RAM is denied unless CONFIG_STRICT_DEVMEM is
set to 'n'.
Implement the 'devmem_is_allowed()' interface for Powerpc. It will be
called from range_is_allowed() when userpsace attempts to access /dev/mem.
This patch is based on an earlier patch from Steve Best and with input from
Paul Mackerras and Scott Wood.
[BenH] Fixed a typo or two and removed the generic change which should
be submitted as a separate patch
Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This adds a udbg and an hvc console backend for supporting a console
using the OPAL console interfaces.
On OPAL v1 we have hvc0 mapped to whatever console the system was
configured for (network or hvsi serial port) via the service
processor.
On OPAL v2 we have hvcN mapped to the Nth console provided by OPAL
which generally corresponds to:
hvc0 : network console (raw protocol)
hvc1 : serial port S1 (hvsi)
hvc2 : serial port S2 (hvsi)
Note: At this point, early debug console only works with OPAL v1
and shouldn't be enabled in a normal kernel.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
It was preventing the global early debug selection whenever KVM was enabled
instead of only preventing the 440 specific one.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Add a new udbg driver for the PS3 gelic Ehthernet device.
This driver shares only a few stucture and constant definitions with the
gelic Ethernet device driver, so is implemented as a stand-alone driver
with no dependencies on the gelic Ethernet device driver.
Signed-off-by: Hector Martin <hector@marcansoft.com>
Signed-off-by: Andre Heider <a.heider@gmail.com>
Signed-off-by: Geoff Levand <geoff@infradead.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
On pseries machines, consoles are provided by the hypervisor using
a low level get_chars/put_chars type interface. However, this is
really just a transport to the service processor which implements
them either as "raw" console (networked consoles, HMC, ...) or as
"hvsi" serial ports.
The later is a simple packet protocol on top of the raw character
interface that is supposed to convey additional "serial port" style
semantics. In practice however, all it does is provide a way to
read the CD line and set/clear our DTR line, that's it.
We currently implement the "raw" protocol as an hvc console backend
(/dev/hvcN) and the "hvsi" protocol using a separate tty driver
(/dev/hvsi0).
However this is quite impractical. The arbitrary difference between
the two type of devices has been a major source of user (and distro)
confusion. Additionally, there's an additional mini -hvsi implementation
in the pseries platform code for our low level debug console and early
boot kernel messages, which means code duplication, though that low
level variant is impractical as it's incapable of doing the initial
protocol negociation to establish the link to the FSP.
This essentially replaces the dedicated hvsi driver and the platform
udbg code completely by extending the existing hvc_vio backend used
in "raw" mode so that:
- It now supports HVSI as well
- We add support for hvc backend providing tiocm{get,set}
- It also provides a udbg interface for early debug and boot console
This is overall less code, though this will only be obvious once we
remove the old "hvsi" driver, which is still available for now. When
the old driver is enabled, the new code still kicks in for the low
level udbg console, replacing the old mini implementation in the platform
code, it just doesn't provide the higher level "hvc" interface.
In addition to producing generally simler code, this has several benefits
over our current situation:
- The user/distro only has to deal with /dev/hvcN for the hypervisor
console, avoiding all sort of confusion that has plagued us in the past
- The tty, kernel and low level debug console all use the same code
base which supports the full protocol establishment process, thus the
console is now available much earlier than it used to be with the
old HVSI driver. The kernel console works much earlier and udbg is
available much earlier too. Hackers can enable a hard coded very-early
debug console as well that works with HVSI (previously that was only
supported for the "raw" mode).
I've tried to keep the same semantics as hvsi relative to how I react
to things like CD changes, with some subtle differences though:
- I clear DTR on close if HUPCL is set
- Current hvsi triggers a hangup if it detects a up->down transition
on CD (you can still open a console with CD down). My new implementation
triggers a hangup if the link to the FSP is severed, and severs it upon
detecting a up->down transition on CD.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Irq stacks provide an essential protection from stack overflows through
external interrupts, at the cost of two additionals stacks per CPU.
Enable them unconditionally to simplify the kernel build and prevent
people from accidentally disabling them.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Enable the DEBUG_PER_CPU_MAPS option so we can look for problems with
cpumasks .
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* 'next' of git://git.secretlab.ca/git/linux-2.6: (23 commits)
powerpc: fix up for mmu_mapin_ram api change
powerpc: wii: allow ioremap within the memory hole
powerpc: allow ioremap within reserved memory regions
wii: use both mem1 and mem2 as ram
wii: bootwrapper: add fixup to calc useable mem2
powerpc: gamecube/wii: early debugging using usbgecko
powerpc: reserve fixmap entries for early debug
powerpc: wii: default config
powerpc: wii: platform support
powerpc: wii: hollywood interrupt controller support
powerpc: broadway processor support
powerpc: wii: bootwrapper bits
powerpc: wii: device tree
powerpc: gamecube: default config
powerpc: gamecube: platform support
powerpc: gamecube/wii: flipper interrupt controller support
powerpc: gamecube/wii: udbg support for usbgecko
powerpc: gamecube/wii: do not include PCI support
powerpc: gamecube/wii: declare as non-coherent platforms
powerpc: gamecube/wii: introduce GAMECUBE_COMMON
...
Fix up conflicts in arch/powerpc/mm/fsl_booke_mmu.c.
Hopefully even close to correctly.
Add support for using the USB Gecko adapter as an early debugging
console on the Nintendo GameCube and Wii video game consoles.
The USB Gecko is a 3rd party memory card interface adapter that provides
a EXI (External Interface) to USB serial converter.
Signed-off-by: Albert Herranz <albert_herranz@yahoo.es>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Add hcall_entry and hcall_exit tracepoints. This replaces the inline
assembly HCALL_STATS code and converts it to use the new tracepoints.
To keep the disabled case as quick as possible, we embed a status word
in the TOC so we can get at it with a single load. By doing so we
keep the overhead at a minimum. Time taken for a null hcall:
No tracepoint code: 135.79 cycles
Disabled tracepoints: 137.95 cycles
For reference, before this patch enabling HCALL_STATS resulted in a null
hcall of 201.44 cycles!
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Add the option to build the code under arch/powerpc with -Werror.
The intention is to make it harder for people to inadvertantly introduce
warnings in the arch/powerpc code. It needs to be configurable so that
if a warning is introduced, people can easily work around it while it's
being fixed.
The option is a negative, ie. don't enable -Werror, so that it will be
turned on for allyes and allmodconfig builds.
The default is n, in the hope that developers will build with -Werror,
that will probably lead to some build breaks, I am prepared to be flamed.
It's not enabled for math-emu, which is a steaming pile of warnings.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
