Remove all unused bitfields and macros. Convert the remaining
bitfields to use __BITFIELD_FIELD instead of #ifdef.
[ralf@linux-mips.org: Add inclusions of <uapi/asm/bitfield.h> as necessary.]
Signed-off-by: Steven J. Hill <steven.hill@cavium.com>
Acked-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/15405/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Remove all unused bitfields and macros. Convert the remaining
bitfields to use __BITFIELD_FIELD instead of #ifdef.
[ralf@linux-mips.org: Add inclusions of <uapi/asm/bitfield.h> as necessary.]
Signed-off-by: Steven J. Hill <steven.hill@cavium.com>
Acked-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/15403/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Some users must have 4K pages while needing a 48-bit VA space size.
The cleanest way do do this is to go to a 4-level page table for this
case. Each page table level using order-0 pages adds 9 bits to the
VA size (at 4K pages, so for four levels we get 9 * 4 + 12 == 48-bits.
For the 4K page size case only we add support functions for the PUD
level of the page table tree, also the TLB exception handlers get an
extra level of tree walk.
[david.daney@cavium.com: Forward port to v4.10.]
[david.daney@cavium.com: Forward port to v4.11.]
Signed-off-by: Alex Belits <alex.belits@cavium.com>
Signed-off-by: David Daney <david.daney@cavium.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Alex Belits <alex.belits@cavium.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/15312/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Add missing macros and methods that are required by
CONFIG_GENERIC_CPU_AUTOPROBE: MAX_CPU_FEATURES, cpu_have_feature(),
cpu_feature().
Also set a default elf platform as currently it is not set for most MIPS
platforms resulting in incorrectly specified modalias values in cpu
autoprobe ("cpu:type:(null):feature:...").
Export 'elf_hwcap' symbol so that it can be accessed from modules that
use module_cpu_feature_match()
Signed-off-by: Marcin Nowakowski <marcin.nowakowski@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/15395/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Pull MIPS fixes from Ralf Baechle:
"Lantiq:
- Fix adding xbar resoures causing a panic
Loongson3:
- Some Loongson 3A don't identify themselves as having an FTLB so
hardwire that knowledge into CPU probing.
- Handle Loongson 3 TLB peculiarities in the fast path of the RDHWR
emulation.
- Fix invalid FTLB entries with huge page on VTLB+FTLB platforms
- Add missing calculation of S-cache and V-cache cache-way size
Ralink:
- Fix typos in rt3883 pinctrl data
Generic:
- Force o32 fp64 support on 32bit MIPS64r6 kernels
- Yet another build fix after the linux/sched.h changes
- Wire up statx system call
- Fix stack unwinding after introduction of IRQ stack
- Fix spinlock code to build even for microMIPS with recent binutils
SMP-CPS:
- Fix retrieval of VPE mask on big endian CPUs"
* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
MIPS: IRQ Stack: Unwind IRQ stack onto task stack
MIPS: c-r4k: Fix Loongson-3's vcache/scache waysize calculation
MIPS: Flush wrong invalid FTLB entry for huge page
MIPS: Check TLB before handle_ri_rdhwr() for Loongson-3
MIPS: Add MIPS_CPU_FTLB for Loongson-3A R2
MIPS: Lantiq: fix missing xbar kernel panic
MIPS: smp-cps: Fix retrieval of VPE mask on big endian CPUs
MIPS: Wire up statx system call
MIPS: Include asm/ptrace.h now linux/sched.h doesn't
MIPS: ralink: Fix typos in rt3883 pinctrl
MIPS: End spinlocks with .insn
MIPS: Force o32 fp64 support on 32bit MIPS64r6 kernels
When the separate IRQ stack was introduced, stack unwinding only
proceeded as far as the top of the IRQ stack, leading to kernel
backtraces being less useful, lacking the trace of what was interrupted.
Fix this by providing a means for the kernel to unwind the IRQ stack
onto the interrupted task stack. The processor state is saved to the
kernel task stack on interrupt. The IRQ_STACK_START macro reserves an
unsigned long at the top of the IRQ stack where the interrupted task
stack pointer can be saved. After the active stack is switched to the
IRQ stack, save the interrupted tasks stack pointer to the reserved
location.
Fix the stack unwinding code to look for the frame being the top of the
IRQ stack and if so get the next frame from the saved location. The
existing test does not work with the separate stack since the ra is no
longer pointed at ret_from_{irq,exception}.
The test to stop unwinding the stack 32 bytes from the top of a stack
must be modified to allow unwinding to continue up to the location of
the saved task stack pointer when on the IRQ stack. The low / high marks
of the stack are set depending on whether the sp is on an irq stack or
not.
Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Marcin Nowakowski <marcin.nowakowski@imgtec.com>
Cc: Masanari Iida <standby24x7@gmail.com>
Cc: Chris Metcalf <cmetcalf@mellanox.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jason A. Donenfeld <jason@zx2c4.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/15788/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
If an architecture uses 4level-fixup.h we don't need to do anything as
it includes 5level-fixup.h.
If an architecture uses pgtable-nop*d.h, define __ARCH_USE_5LEVEL_HACK
before inclusion of the header. It makes asm-generic code to use
5level-fixup.h.
If an architecture has 4-level paging or folds levels on its own,
include 5level-fixup.h directly.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Use of the task_pt_regs() based macros in MIPS' asm/processor.h for
accessing the user context on the kernel stack need the definition of
struct pt_regs from asm/ptrace.h. __own_fpu() in asm/fpu.h uses these
macros but implicitly depended on linux/sched.h to include asm/ptrace.h.
Since commit f780d89a0e ("sched/headers: Remove <asm/ptrace.h> from
<linux/sched.h>") however linux/sched.h no longer includes asm/ptrace.h,
so include it explicitly from asm/fpu.h where it is needed instead.
This fixes build errors such as:
./arch/mips/include/asm/fpu.h: In function '__own_fpu':
./arch/mips/include/asm/processor.h:385:31: error: invalid application of 'sizeof' to incomplete type 'struct pt_regs'
THREAD_SIZE - 32 - sizeof(struct pt_regs))
^
Fixes: f780d89a0e ("sched/headers: Remove <asm/ptrace.h> from <linux/sched.h>")
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/15386/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
When building for microMIPS we need to ensure that the assembler always
knows that there is code at the target of a branch or jump. Recent
toolchains will fail to link a microMIPS kernel when this isn't the case
due to what it thinks is a branch to non-microMIPS code.
mips-mti-linux-gnu-ld kernel/built-in.o: .spinlock.text+0x2fc: Unsupported branch between ISA modes.
mips-mti-linux-gnu-ld final link failed: Bad value
This is due to inline assembly labels in spinlock.h not being followed
by an instruction mnemonic, either due to a .subsection pseudo-op or the
end of the inline asm block.
Fix this with a .insn direction after such labels.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Reviewed-by: Maciej W. Rozycki <macro@imgtec.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: <stable@vger.kernel.org>
Patchwork: https://patchwork.linux-mips.org/patch/15325/
Signed-off-by: James Hogan <james.hogan@imgtec.com>
After the split of linux/sched.h, several platforms in arch/mips stopped building.
Add the respective additional #include statements to fix the problem I first
tried adding these into asm/processor.h, but ran into circular header
dependencies with that which I could not figure out.
The commit I listed as causing the problem is the branch merge, as there is
likely a combination of multiple patches in that branch.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-mips@linux-mips.org
Cc: ralf@linux-mips.org
Fixes: 1827adb11a ("Merge branch 'WIP.sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip")
Link: http://lkml.kernel.org/r/20170308072931.3836696-1-arnd@arndb.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
We are going to split <linux/sched/task_stack.h> out of <linux/sched.h>, which
will have to be picked up from other headers and a couple of .c files.
Create a trivial placeholder <linux/sched/task_stack.h> file that just
maps to <linux/sched.h> to make this patch obviously correct and
bisectable.
Include the new header in the files that are going to need it.
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Often all is needed is these small helpers, instead of compiler.h or a
full kprobes.h. This is important for asm helpers, in fact even some
asm/kprobes.h make use of these helpers... instead just keep a generic
asm file with helpers useful for asm code with the least amount of
clutter as possible.
Likewise we need now to also address what to do about this file for both
when architectures have CONFIG_HAVE_KPROBES, and when they do not. Then
for when architectures have CONFIG_HAVE_KPROBES but have disabled
CONFIG_KPROBES.
Right now most asm/kprobes.h do not have guards against CONFIG_KPROBES,
this means most architecture code cannot include asm/kprobes.h safely.
Correct this and add guards for architectures missing them.
Additionally provide architectures that not have kprobes support with
the default asm-generic solution. This lets us force asm/kprobes.h on
the header include/linux/kprobes.h always, but most importantly we can
now safely include just asm/kprobes.h on architecture code without
bringing the full kitchen sink of header files.
Two architectures already provided a guard against CONFIG_KPROBES on its
kprobes.h: sh, arch. The rest of the architectures needed gaurds added.
We avoid including any not-needed headers on asm/kprobes.h unless
kprobes have been enabled.
In a subsequent atomic change we can try now to remove compiler.h from
include/linux/kprobes.h.
During this sweep I've also identified a few architectures defining a
common macro needed for both kprobes and ftrace, that of the definition
of the breakput instruction up. Some refer to this as
BREAKPOINT_INSTRUCTION. This must be kept outside of the #ifdef
CONFIG_KPROBES guard.
[mcgrof@kernel.org: fix arm64 build]
Link: http://lkml.kernel.org/r/CAB=NE6X1WMByuARS4mZ1g9+W=LuVBnMDnh_5zyN0CLADaVh=Jw@mail.gmail.com
[sfr@canb.auug.org.au: fixup for kprobes declarations moving]
Link: http://lkml.kernel.org/r/20170214165933.13ebd4f4@canb.auug.org.au
Link: http://lkml.kernel.org/r/20170203233139.32682-1-mcgrof@kernel.org
Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com>
Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Pull rdma DMA mapping updates from Doug Ledford:
"Drop IB DMA mapping code and use core DMA code instead.
Bart Van Assche noted that the ib DMA mapping code was significantly
similar enough to the core DMA mapping code that with a few changes it
was possible to remove the IB DMA mapping code entirely and switch the
RDMA stack to use the core DMA mapping code.
This resulted in a nice set of cleanups, but touched the entire tree
and has been kept separate for that reason."
* tag 'for-next-dma_ops' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: (37 commits)
IB/rxe, IB/rdmavt: Use dma_virt_ops instead of duplicating it
IB/core: Remove ib_device.dma_device
nvme-rdma: Switch from dma_device to dev.parent
RDS: net: Switch from dma_device to dev.parent
IB/srpt: Modify a debug statement
IB/srp: Switch from dma_device to dev.parent
IB/iser: Switch from dma_device to dev.parent
IB/IPoIB: Switch from dma_device to dev.parent
IB/rxe: Switch from dma_device to dev.parent
IB/vmw_pvrdma: Switch from dma_device to dev.parent
IB/usnic: Switch from dma_device to dev.parent
IB/qib: Switch from dma_device to dev.parent
IB/qedr: Switch from dma_device to dev.parent
IB/ocrdma: Switch from dma_device to dev.parent
IB/nes: Remove a superfluous assignment statement
IB/mthca: Switch from dma_device to dev.parent
IB/mlx5: Switch from dma_device to dev.parent
IB/mlx4: Switch from dma_device to dev.parent
IB/i40iw: Remove a superfluous assignment statement
IB/hns: Switch from dma_device to dev.parent
...
Pull KVM updates from Paolo Bonzini:
"4.11 is going to be a relatively large release for KVM, with a little
over 200 commits and noteworthy changes for most architectures.
ARM:
- GICv3 save/restore
- cache flushing fixes
- working MSI injection for GICv3 ITS
- physical timer emulation
MIPS:
- various improvements under the hood
- support for SMP guests
- a large rewrite of MMU emulation. KVM MIPS can now use MMU
notifiers to support copy-on-write, KSM, idle page tracking,
swapping, ballooning and everything else. KVM_CAP_READONLY_MEM is
also supported, so that writes to some memory regions can be
treated as MMIO. The new MMU also paves the way for hardware
virtualization support.
PPC:
- support for POWER9 using the radix-tree MMU for host and guest
- resizable hashed page table
- bugfixes.
s390:
- expose more features to the guest
- more SIMD extensions
- instruction execution protection
- ESOP2
x86:
- improved hashing in the MMU
- faster PageLRU tracking for Intel CPUs without EPT A/D bits
- some refactoring of nested VMX entry/exit code, preparing for live
migration support of nested hypervisors
- expose yet another AVX512 CPUID bit
- host-to-guest PTP support
- refactoring of interrupt injection, with some optimizations thrown
in and some duct tape removed.
- remove lazy FPU handling
- optimizations of user-mode exits
- optimizations of vcpu_is_preempted() for KVM guests
generic:
- alternative signaling mechanism that doesn't pound on
tsk->sighand->siglock"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (195 commits)
x86/kvm: Provide optimized version of vcpu_is_preempted() for x86-64
x86/paravirt: Change vcp_is_preempted() arg type to long
KVM: VMX: use correct vmcs_read/write for guest segment selector/base
x86/kvm/vmx: Defer TR reload after VM exit
x86/asm/64: Drop __cacheline_aligned from struct x86_hw_tss
x86/kvm/vmx: Simplify segment_base()
x86/kvm/vmx: Get rid of segment_base() on 64-bit kernels
x86/kvm/vmx: Don't fetch the TSS base from the GDT
x86/asm: Define the kernel TSS limit in a macro
kvm: fix page struct leak in handle_vmon
KVM: PPC: Book3S HV: Disable HPT resizing on POWER9 for now
KVM: Return an error code only as a constant in kvm_get_dirty_log()
KVM: Return an error code only as a constant in kvm_get_dirty_log_protect()
KVM: Return directly after a failed copy_from_user() in kvm_vm_compat_ioctl()
KVM: x86: remove code for lazy FPU handling
KVM: race-free exit from KVM_RUN without POSIX signals
KVM: PPC: Book3S HV: Turn "KVM guest htab" message into a debug message
KVM: PPC: Book3S PR: Ratelimit copy data failure error messages
KVM: Support vCPU-based gfn->hva cache
KVM: use separate generations for each address space
...
Pull MIPS updates from James Hogan:
"Here's the main MIPS pull request for 4.11.
It contains a few new features such as IRQ stacks, cacheinfo support,
and KASLR for Octeon CPUs, and a variety of smaller improvements and
fixes including devicetree additions, kexec cleanups, microMIPS stack
unwinding fixes, and a bunch of build fixes to clean up continuous
integration builds.
Its all been in linux-next for at least a couple of days, most of it
far longer.
Miscellaneous:
- Add IRQ stacks
- Add cacheinfo support
- Add "uzImage.bin" zboot target
- Unify performance counter definitions
- Export various (mainly assembly) symbols alongside their
definitions
- Audit and remove unnecessary uses of module.h
kexec & kdump:
- Lots of improvements and fixes
- Add correct copy_regs implementations
- Add debug logging of new kernel information
Security:
- Use Makefile.postlink to insert relocations into vmlinux
- Provide plat_post_relocation hook (used for Octeon KASLR)
- Add support for tuning mmap randomisation
- Relocate DTB
microMIPS:
- A load of unwind fixes
- Add some missing .insn to fix link errors
MIPSr6:
- Fix MULTU/MADDU/MSUBU sign extension in r2 emulation
- Remove r2_emul_return and use ERETNC unconditionally on MIPSr6
- Allow pre-r6 emulation on SMP MIPSr6 kernels
Cache management:
- Treat physically indexed dcache as non-aliasing
- Add return errors to protected cache ops for KVM
- CM3: Ensure L1 & L2 cache ECC checking matches
- CM3: Indicate inclusive caches
- I6400: Treat dcache as physically indexed
Memory management:
- Ensure bootmem doesn't corrupt reserved memory
- Export some TLB exception generation functions for KVM
OF:
- NULL check initial_boot_params before use in of_scan_flat_dt()
- Fix unaligned access in of_alias_scan()
SMP:
- CPS: Don't BUG if a CPU fails to start
Other fixes:
- Fix longstanding 64-bit IP checksum carry bug
- Fix KERN_CONT fallout in cpu-bugs64.c and sync-r4k.c
- Update defconfigs for NF_CT_PROTO_DCCP, DPLITE,
CPU_FREQ_STAT,SCSI_DH changes
- Disable certain builtin compiler options, stack-check (whole
kernel), asynchronous-unwind-tables (VDSO).
- A bunch of build fixes from kernelci.org testing
- Various other minor cleanups & corrections
BMIPS:
- Migrate interrupts during bmips_cpu_disable
- BCM47xx: Add Luxul devices
- BCM47xx: Fix Asus WL-500W button inversion
- BCM7xxx: Add SPI device nodes
Generic (multiplatform):
- Add kexec DTB passing
- Fix big endian
- Add cpp_its_S in ksym_dep_filter to silence build warning
IP22:
- Reformat inline assembler code to modern standards
- Fix binutils 2.25 build error
IP27:
- Fix duplicate CAC_BASE definition build error
- Disable qlge driver to workaround broken compiler
Lantiq:
- Refresh defconfig and activate more drivers
- Lock DMA register access
- Fix cascading IRQ setup
- Fix build of VPE loader
- xway: Fix ethernet packet header corruption over reboot
Loongson1
- Add watchdog support
- 1B: Reduce DEFAULT_MEMSIZE to 64MB
- 1B: Change OSC clock name to match rest of kernel
- 1C: Remove ARCH_WANT_OPTIONAL_GPIOLIB
Octeon:
- Add KASLR support
- Support Octeon III USB controller
- Fix large copy_from_user corner case
- Enable devtmpfs in defconfig
Netlogic:
- Fix non-default XLR build error due to netlogic,xlp-pic code
- Fix assembler warning from smpboot.S
pic32mzda:
- Fix linker error when early printk is disabled
Pistachio:
- Add base device tree
- Add Ci40 "Marduk" device tree
Ralink:
- Support raw appended DTB
- Add missing I2C & I2S clocks
- Add missing pinmux and fix pinmux function name typo
- Add missing clk_round_rate()
- Clean up prom_init()
- MT7621: Set SoC type
- MT7621: Support highmem
TXx9:
- Modernize printing of kernel messages and resolve KERN_CONT fallout
- 7segled: use permission-specific DEVICE_ATTR variants
XilFPGA:
- Add IRQ controller and UART IRQ
- Add AXI I2C and emaclite to DT & defconfig"
* tag 'mips_4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/mips: (148 commits)
MIPS: VDSO: Explicitly use -fno-asynchronous-unwind-tables
MIPS: BCM47XX: Fix button inversion for Asus WL-500W
MIPS: DTS: Add img directory to Makefile
MIPS: ip27: Disable qlge driver in defconfig
MIPS: pic32mzda: Fix linker error for pic32_get_pbclk()
MIPS: Lantiq: Keep ethernet enabled during boot
MIPS: OCTEON: Fix copy_from_user fault handling for large buffers
MIPS: Fix special case in 64 bit IP checksumming.
MIPS: OCTEON: Enable DEVTMPFS
MIPS: lantiq: Set physical_memsize
MIPS: sysmips: Remove duplicated include from syscall.c
Kbuild: Add cpp_its_S in ksym_dep_filter
MIPS: Audit and remove any unnecessary uses of module.h
MIPS: Unify perf counter register definitions
MIPS: Disable stack checks on MIPS kernels
MIPS: OCTEON: Platform support for OCTEON III USB controller
MIPS: Lantiq: Fix cascaded IRQ setup
MIPS: sync-r4k: Fix KERN_CONT fallout
MIPS: IRQ Stack: Fix erroneous jal to plat_irq_dispatch
MIPS: Fix distclean with Makefile.postlink
...
For certain arguments such as saddr = 0xc0a8fd60, daddr = 0xc0a8fda1,
len = 80, proto = 17, sum = 0x7eae049d there will be a carry when
folding the intermediate 64 bit checksum to 32 bit but the code doesn't
add the carry back to the one's complement sum, thus an incorrect result
will be generated.
Reported-by: Mark Zhang <bomb.zhang@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Cc: stable@vger.kernel.org
Signed-off-by: James Hogan <james.hogan@imgtec.com>
When building for microMIPS we need to ensure that the assembler always
knows that there is code at the target of a branch or jump. Commit
7170bdc777 ("MIPS: Add return errors to protected cache ops")
introduced a fixup path to protected_cache(e)_op() which does not meet
this requirement. The fixup path jumps to the "2" label but the .section
pseudo-op immediately following it causes the label to be marked as
data. Linking then fails with:
mips-img-linux-gnu-ld: arch/mips/mm/c-r4k.o: .fixup+0x0: Unsupported
jump between ISA modes; consider recompiling with interlinking
enabled.
Fix this by declaring that "2" labels code using the .insn directive.
Fixes: 7170bdc777 ("MIPS: Add return errors to protected cache ops")
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Reviewed-by: Maciej W. Rozycki <macro@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: Ralf Baechle <ralf@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/15274/
Signed-off-by: James Hogan <james.hogan@imgtec.com>
MIPS dependencies for KVM
Miscellaneous MIPS architecture changes depended on by the MIPS KVM
changes in the KVM tree.
- Move pgd_alloc() out of header.
- Exports so KVM can access page table management and TLBEX functions.
- Add return errors to protected cache ops.
Increase the maximum number of MIPS KVM VCPUs to 8, and implement the
KVM_CAP_NR_VCPUS and KVM_CAP_MAX_CPUS capabilities which expose the
recommended and maximum number of VCPUs to userland. The previous
maximum of 1 didn't allow for any form of SMP guests.
We calculate the values similarly to ARM, recommending as many VCPUs as
there are CPUs online in the system. This will allow userland to know
how many VCPUs it is possible to create.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Steven J. Hill
Alex Belits
David Daney
Marcin Nowakowski
Linus Torvalds
Matt Redfearn
Kirill A. Shutemov
James Hogan
Paul Burton
Arnd Bergmann
Ingo Molnar
Luis R. Rodriguez
Ralf Baechle