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HV_X64_MSR_GUEST_IDLE_AVAILABLE appeared in kvm_vcpu_ioctl_get_hv_cpuid()
by mistake: it announces support for HV_X64_MSR_GUEST_IDLE (0x400000F0)
which we don't support in KVM (yet).
Fixes: 2bc39970e932 ("x86/kvm/hyper-v: Introduce KVM_GET_SUPPORTED_HV_CPUID")
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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ccount_timer_shutdown is called from the atomic context in the
secondary_start_kernel, resulting in the following BUG:
BUG: sleeping function called from invalid context
in_atomic(): 1, irqs_disabled(): 1, pid: 0, name: swapper/1
Preemption disabled at:
secondary_start_kernel+0xa1/0x130
Call Trace:
___might_sleep+0xe7/0xfc
__might_sleep+0x41/0x44
synchronize_irq+0x24/0x64
disable_irq+0x11/0x14
ccount_timer_shutdown+0x12/0x20
clockevents_switch_state+0x82/0xb4
clockevents_exchange_device+0x54/0x60
tick_check_new_device+0x46/0x70
clockevents_register_device+0x8c/0xc8
clockevents_config_and_register+0x1d/0x2c
local_timer_setup+0x75/0x7c
secondary_start_kernel+0xb4/0x130
should_never_return+0x32/0x35
Use disable_irq_nosync instead of disable_irq to avoid it.
This is safe because the ccount timer IRQ is per-CPU, and once IRQ is
masked the ISR will not be called.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
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max_low_pfn should be pfn_size not byte_size.
Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Signed-off-by: Mao Han <mao_han@c-sky.com>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
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This allows acceleration of cryptography inside QEMU.
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
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Enable generic PCIe by default in the RISC-V defconfig, this allows us
to use QEMU's PCIe support out of the box. CONFIG_RAS=y is
automatically selected by generic PCIe, so it has been dropped from
the defconfig.
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
[Palmer: Split out PCIE_XILINX and CRYPTO_DEV_VIRTIO]
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
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Xen-swiotlb hooks into the arm/arm64 arch code through a copy of the DMA
DMA mapping operations stored in the struct device arch data.
Switching arm64 to use the direct calls for the merged DMA direct /
swiotlb code broke this scheme. Replace the indirect calls with
direct-calls in xen-swiotlb as well to fix this problem.
Fixes: 356da6d0cde3 ("dma-mapping: bypass indirect calls for dma-direct")
Reported-by: Julien Grall <julien.grall@arm.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
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eb01d42a7778 ("PCI: consolidate PCI config entry in drivers/pci")
reorganized the PCI-related Kconfig entries and resulted in a diff in
our defconfig. This simply removes the diff.
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
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Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
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There is no CONFIG_64BITS Kconfig macro.
Please see arch/riscv/Kconfig for details, e.g.
linux$ git grep -HnA 1 "config 64BIT" arch/riscv/Kconfig
arch/riscv/Kconfig:6:config 64BIT
arch/riscv/Kconfig-7- bool
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
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of_find_node_by_type already calls of_node_put, don't call it again.
Fixes: 94f9bf118f ("RISC-V: Fix of_node_* refcount")
Signed-off-by: Andreas Schwab <schwab@suse.de>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
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The cond_resched() can be used to yield the CPU resource if
CONFIG_PREEMPT is not defined. Otherwise, cond_resched() is a dummy
function. In order to avoid kernel thread occupying entire CPU,
when CONFIG_PREEMPT=y, the kernel thread needs to follow the
rescheduling mechanism like a user thread.
Signed-off-by: Vincent Chen <vincentc@andestech.com>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 fixes from Martin Schwidefsky:
- Do not claim to run under z/VM if the hypervisor can not be
identified
- Fix crashes due to outdated ASCEs in CR1
- Avoid a deadlock in regard to CPU hotplug
- Really fix the vdso mapping issue for compat tasks
- Avoid crash on restart due to an incorrect stack address
* tag 's390-5.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390/smp: Fix calling smp_call_ipl_cpu() from ipl CPU
s390/vdso: correct vdso mapping for compat tasks
s390/smp: fix CPU hotplug deadlock with CPU rescan
s390/mm: always force a load of the primary ASCE on context switch
s390/early: improve machine detection
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After commit
5d32a66541c4 ("PCI/ACPI: Allow ACPI to be built without CONFIG_PCI set")
dependencies on CONFIG_PCI that previously were satisfied implicitly
through dependencies on CONFIG_ACPI have to be specified directly.
PCI_LOCKLESS_CONFIG depends on PCI but this dependency has not been
mentioned in the Kconfig so add an explicit dependency here and fix
WARNING: unmet direct dependencies detected for PCI_LOCKLESS_CONFIG
Depends on [n]: PCI [=n]
Selected by [y]:
- X86 [=y]
Fixes: 5d32a66541c46 ("PCI/ACPI: Allow ACPI to be built without CONFIG_PCI set")
Signed-off-by: Sinan Kaya <okaya@kernel.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-acpi@vger.kernel.org
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/20190121231958.28255-2-okaya@kernel.org
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git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc
Pull ARC architecture updates from Vineet Gupta:
- Perf support for raw events
- boot log printing: return stack, action points
- fix memset to avoid prefetchw bleeding past end of buffer
- do_page_fault fix for mmap_sem held while returning to userspace
- other misc fixes
* tag 'arc-5.0-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
ARCv2: lib: memeset: fix doing prefetchw outside of buffer
ARC: mm: do_page_fault fixes #1: relinquish mmap_sem if signal arrives while handle_mm_fault
ARC: show_regs: lockdep: re-enable preemption
ARC: show_regs: lockdep: avoid page allocator...
ARC: perf: avoid kernel killing where it is possible
ARC: perf: move HW events mapping to separate function
ARC: perf: introduce Kernel PMU events support
ARC: perf: trivial code cleanup
ARC: perf: map generic branches to correct hardware condition
ARC: adjust memblock_reserve of kernel memory
arc: remove redundant kernel-space generic-y
ARC: fix __ffs return value to avoid build warnings
ARC: boot log: print Action point details
ARCv2: boot log: BPU return stack depth
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Commit 594cc251fdd0 ("make 'user_access_begin()' do 'access_ok()'")
makes the access_ok() check part of the user_access_begin() preceding a
series of 'unsafe' accesses. This has the desirable effect of ensuring
that all 'unsafe' accesses have been range-checked, without having to
pick through all of the callsites to verify whether the appropriate
checking has been made.
However, the consolidated range check does not inhibit speculation, so
it is still up to the caller to ensure that they are not susceptible to
any speculative side-channel attacks for user addresses that ultimately
fail the access_ok() check.
This is an oversight, so use __uaccess_begin_nospec() to ensure that
speculation is inhibited until the access_ok() check has passed.
Reported-by: Julien Thierry <julien.thierry@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Will Deacon:
"Three arm64 fixes for -rc3.
We've plugged a couple of nasty issues involving KASLR-enabled
kernels, and removed a redundant #define that was introduced as part
of the KHWASAN fixes from akpm at -rc2.
- Fix broken kpti page-table rewrite in bizarre KASLR configuration
- Fix module loading with KASLR
- Remove redundant definition of ARCH_SLAB_MINALIGN"
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
kasan, arm64: remove redundant ARCH_SLAB_MINALIGN define
arm64: kaslr: ensure randomized quantities are clean to the PoC
arm64: kpti: Update arm64_kernel_use_ng_mappings() when forced on
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git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux
Pull MIPS fixes from Paul Burton:
- Fix IPI handling for Lantiq SoCs, which was broken by changes made
back in v4.12.
- Enable OF/DT serial support in ath79_defconfig to give us working
serial by default.
- Fix 64b builds for the Jazz platform.
- Set up a struct device for the BCM47xx SoC to allow BCM47xx drivers
to perform DMA again following the major DMA mapping changes made in
v4.19.
- Disable MSI on Cavium Octeon systems when the pcie_disable command
line parameter introduced in v3.3 is used, in order to avoid
inadvetently accessing PCIe controller registers despite the command
line.
- Fix a build failure for Cavium Octeon kernels with kexec enabled,
introduced in v4.20.
- Fix a regression in the behaviour of semctl/shmctl/msgctl IPC
syscalls for kernels including n32 support but not o32 support caused
by some cleanup in v3.19.
* tag 'mips_fixes_5.0_2' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux:
MIPS: OCTEON: fix kexec support
mips: fix n32 compat_ipc_parse_version
Disable MSI also when pcie-octeon.pcie_disable on
MIPS: BCM47XX: Setup struct device for the SoC
MIPS: jazz: fix 64bit build
MIPS: ath79: Enable OF serial ports in the default config
MIPS: lantiq: Use CP0_LEGACY_COMPARE_IRQ
MIPS: lantiq: Fix IPI interrupt handling
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git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux
Pull Devicetree fix from Rob Herring:
"A single build fix for powerpc due to device_node.type removal"
* tag 'devicetree-fixes-for-5.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
powerpc: chrp: Use of_node_is_type to access device_type
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Commit 8ce5f8415753 ("of: Remove struct device_node.type pointer")
removed struct device_node.type pointer, but the conversion to use
of_node_is_type() accessor was missed in chrp_init_IRQ().
Fixes: 8ce5f8415753 ("of: Remove struct device_node.type pointer")
Reported-by: kbuild test robot <lkp@intel.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: linuxppc-dev@lists.ozlabs.org
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Rob Herring <robh@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
"A couple of weeks of fixes.
There's one fix for an oops on Power9 machines with Open CAPI
adapters.
And a fix for probable memory corruption in some of the new NPU code,
caught by smatch though and not seen in the wild.
Plus a few other minor fixes.
There's one non-fix which is the perf_regs change. That was sent
during the merge window but I accidentally only merged the first of
two patches in the series. It's been in linux-next so hopefully
doesn't conflict with anything in acme's tree.
Thanks to: Alexey Kardashevskiy, Andrew Donnellan, Breno Leitao,
Christian Lamparter, Christophe Leroy, Dan Carpenter, Frederic Barrat,
Greg Kurz, Jason A. Donenfeld, Madhavan Srinivasan"
* tag 'powerpc-5.0-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/syscalls: Fix syscall tracing
powerpc/pseries: Fix build break due to pnv_npu2_init()
powerpc/4xx/ocm: Fix fix for phys_addr_t printf warnings
powerpc/powernv/npu: Fix oops in pnv_try_setup_npu_table_group()
powerpc/tm: Limit TM code inside PPC_TRANSACTIONAL_MEM
powerpc/8xx: fix setting of pagetable for Abatron BDI debug tool.
powerpc/powernv/npu: Allocate enough memory in pnv_try_setup_npu_table_group()
powerpc/perf: Update perf_regs structure to include MMCRA
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git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen fixes from Juergen Gross:
- Several fixes for the Xen pvcalls drivers (1 fix for the backend and
8 for the frontend).
- A fix for a rather longstanding bug in the Xen sched_clock()
interface which led to weird time jumps when migrating the system.
- A fix for avoiding accesses to x2apic MSRs in Xen PV guests.
* tag 'for-linus-5.0-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
xen: Fix x86 sched_clock() interface for xen
pvcalls-front: fix potential null dereference
always clear the X2APIC_ENABLE bit for PV guest
pvcalls-front: Avoid get_free_pages(GFP_KERNEL) under spinlock
xen/pvcalls: remove set but not used variable 'intf'
pvcalls-back: set -ENOTCONN in pvcalls_conn_back_read
pvcalls-front: don't return error when the ring is full
pvcalls-front: properly allocate sk
pvcalls-front: don't try to free unallocated rings
pvcalls-front: read all data before closing the connection
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI fixes from Rafael Wysocki:
"These fix an ACPI initialization ordering issue introduced in the 4.17
time frame and causing functional problems to appear on multiple
systems and fix some fallout of the recent change to enable building
kernels with ACPI support and without PCI.
Specifics:
- Restore the ACPI initialization ordering changed implicitly by the
module-level AML handling rework during the 4.17 development cycle
that caused the EC address space handler based on information from
ECDT to be set up before loading AML definition blocks, making it
effectively not accessible by AML on some systems that don't work
as expected any more (Rafael Wysocki).
- Add direct dependencies on PCI to Kconfig in multiple places for
code that depends on both ACPI and PCI, but the PCI dependency was
implicitly satisfied by the ACPI dependency before, to prevent
invalid configurations from being created, for example by
randconfig (Sinan Kaya)"
* tag 'acpi-5.0-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI: EC: Look for ECDT EC after calling acpi_load_tables()
drivers: thermal: int340x_thermal: Make PCI dependency explicit
x86/intel/lpss: Make PCI dependency explicit
platform/x86: apple-gmux: Make PCI dependency explicit
platform/x86: intel_pmc: Make PCI dependency explicit
platform/x86: intel_ips: make PCI dependency explicit
vga-switcheroo: make PCI dependency explicit
ata: pata_acpi: Make PCI dependency explicit
ACPI / LPSS: Make PCI dependency explicit
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ARCv2 optimized memset uses PREFETCHW instruction for prefetching the
next cache line but doesn't ensure that the line is not past the end of
the buffer. PRETECHW changes the line ownership and marks it dirty,
which can cause issues in SMP config when next line was already owned by
other core. Fix the issue by avoiding the PREFETCHW
Some more details:
The current code has 3 logical loops (ignroing the unaligned part)
(a) Big loop for doing aligned 64 bytes per iteration with PREALLOC
(b) Loop for 32 x 2 bytes with PREFETCHW
(c) any left over bytes
loop (a) was already eliding the last 64 bytes, so PREALLOC was
safe. The fix was removing PREFETCW from (b).
Another potential issue (applicable to configs with 32 or 128 byte L1
cache line) is that PREALLOC assumes 64 byte cache line and may not do
the right thing specially for 32b. While it would be easy to adapt,
there are no known configs with those lie sizes, so for now, just
compile out PREALLOC in such cases.
Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Cc: stable@vger.kernel.org #4.4+
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
[vgupta: rewrote changelog, used asm .macro vs. "C" macro]
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handle_mm_fault
do_page_fault() forgot to relinquish mmap_sem if a signal came while
handling handle_mm_fault() - due to say a ctl+c or oom etc.
This would later cause a deadlock by acquiring it twice.
This came to light when running libc testsuite tst-tls3-malloc test but
is likely also the cause for prior seen LTP failures. Using lockdep
clearly showed what the issue was.
| # while true; do ./tst-tls3-malloc ; done
| Didn't expect signal from child: got `Segmentation fault'
| ^C
| ============================================
| WARNING: possible recursive locking detected
| 4.17.0+ #25 Not tainted
| --------------------------------------------
| tst-tls3-malloc/510 is trying to acquire lock:
| 606c7728 (&mm->mmap_sem){++++}, at: __might_fault+0x28/0x5c
|
|but task is already holding lock:
|606c7728 (&mm->mmap_sem){++++}, at: do_page_fault+0x9c/0x2a0
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| other info that might help us debug this:
| Possible unsafe locking scenario:
|
| CPU0
| ----
| lock(&mm->mmap_sem);
| lock(&mm->mmap_sem);
|
| *** DEADLOCK ***
|
------------------------------------------------------------
What the change does is not obvious (note to myself)
prior code was
| do_page_fault
|
| down_read() <-- lock taken
| handle_mm_fault <-- signal pending as this runs
| if fatal_signal_pending
| if VM_FAULT_ERROR
| up_read
| if user_mode
| return <-- lock still held, this was the BUG
New code
| do_page_fault
|
| down_read() <-- lock taken
| handle_mm_fault <-- signal pending as this runs
| if fatal_signal_pending
| if VM_FAULT_RETRY
| return <-- not same case as above, but still OK since
| core mm already relinq lock for FAULT_RETRY
| ...
|
| < Now falls through for bug case above >
|
| up_read() <-- lock relinquished
Cc: stable@vger.kernel.org
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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While in the native case entry into the kernel happens on the trampoline
stack, PV Xen kernels get entered with the current thread stack right
away. Hence source and destination stacks are identical in that case,
and special care is needed.
Other than in sync_regs() the copying done on the INT80 path isn't
NMI / #MC safe, as either of these events occurring in the middle of the
stack copying would clobber data on the (source) stack.
There is similar code in interrupt_entry() and nmi(), but there is no fixup
required because those code paths are unreachable in XEN PV guests.
[ tglx: Sanitized subject, changelog, Fixes tag and stable mail address. Sigh ]
Fixes: 7f2590a110b8 ("x86/entry/64: Use a per-CPU trampoline stack for IDT entries")
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Juergen Gross <jgross@suse.com>
Acked-by: Andy Lutomirski <luto@kernel.org>
Cc: Peter Anvin <hpa@zytor.com>
Cc: xen-devel@lists.xenproject.org>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/5C3E1128020000780020DFAD@prv1-mh.provo.novell.com
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signal handling core calls show_regs() with preemption disabled which
on ARC takes mmap_sem for mm/vma access, causing lockdep splat.
| [ARCLinux]# ./segv-null-ptr
| potentially unexpected fatal signal 11.
| BUG: sleeping function called from invalid context at kernel/fork.c:1011
| in_atomic(): 1, irqs_disabled(): 0, pid: 70, name: segv-null-ptr
| no locks held by segv-null-ptr/70.
| CPU: 0 PID: 70 Comm: segv-null-ptr Not tainted 4.18.0+ #69
|
| Stack Trace:
| arc_unwind_core+0xcc/0x100
| ___might_sleep+0x17a/0x190
| mmput+0x16/0xb8
| show_regs+0x52/0x310
| get_signal+0x5ee/0x610
| do_signal+0x2c/0x218
| resume_user_mode_begin+0x90/0xd8
Workaround by re-enabling preemption temporarily.
Note that the preemption disabling in core code around show_regs()
was introduced by commit 3a9f84d354ce ("signals, debug: fix BUG: using
smp_processor_id() in preemptible code in print_fatal_signal()")
to silence a differnt lockdep seen on x86 bakc in 2009.
Cc: <stable@vger.kernel.org>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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and use smaller/on-stack buffer instead
The motivation for this change was lockdep splat like below.
| potentially unexpected fatal signal 11.
| BUG: sleeping function called from invalid context at ../mm/page_alloc.c:4317
| in_atomic(): 1, irqs_disabled(): 0, pid: 57, name: segv
| no locks held by segv/57.
| Preemption disabled at:
| [<8182f17e>] get_signal+0x4a6/0x7c4
| CPU: 0 PID: 57 Comm: segv Not tainted 4.17.0+ #23
|
| Stack Trace:
| arc_unwind_core.constprop.1+0xd0/0xf4
| __might_sleep+0x1f6/0x234
| __get_free_pages+0x174/0xca0
| show_regs+0x22/0x330
| get_signal+0x4ac/0x7c4 # print_fatal_signals() -> preempt_disable()
| do_signal+0x30/0x224
| resume_user_mode_begin+0x90/0xd8
So signal handling core calls show_regs() with preemption disabled but
an ensuing GFP_KERNEL page allocator call is flagged by lockdep.
We could have switched to GFP_NOWAIT, but turns out that is not enough
anways and eliding page allocator call leads to less code and
instruction traces to sift thru when debugging pesky crashes.
FWIW, this patch doesn't cure the lockdep splat (which next patch does).
Reviewed-by: William Kucharski <william.kucharski@oracle.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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No, not gonna die tonight.
Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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Move HW events mapping to separate function to make code more readable.
Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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Export all available ARC architected hardware events as
kernel PMU events to make non-generic events accessible.
ARC PMU HW allow us to read the list of all available
events names. So we generate kernel PMU event list
dynamically in arc_pmu_device_probe() using
human-readable events names we got from HW instead of
using pre-defined events list.
-------------------------->8--------------------------
$ perf list
[snip]
arc_pmu/bdata64/ [Kernel PMU event]
arc_pmu/bdcstall/ [Kernel PMU event]
arc_pmu/bdslot/ [Kernel PMU event]
arc_pmu/bfbmp/ [Kernel PMU event]
arc_pmu/bfirqex/ [Kernel PMU event]
arc_pmu/bflgstal/ [Kernel PMU event]
arc_pmu/bflush/ [Kernel PMU event]
-------------------------->8--------------------------
Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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* Use BIT(), lower_32_bits(), upper_32_bits() macroses,
fix code style violations.
* Use u32, u64, s64 instead of uint32_t, uint64_t, int64_t
* Fix description comment as this code doesn't belong only to
ARC700 anymore.
* Use SPDX License Identifier.
* Remove useless ifdefs. ifdef around 'arc_pmu_match' structure
declaration is useless as we refer to 'arc_pmu_match' in
several places which aren't guarded with ifdef. Nevertheless
'ARC' option selects 'OF' unconditionally so we can simply
get rid of this ifdef.
Acked-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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So far we've mapped branches to "ijmp" which also counts conditional
branches NOT taken. This makes us different from other architectures
such as ARM which seem to be counting only taken branches.
So use "ijmptak" hardware condition which only counts (all jump
instructions that are taken)
'ijmptak' event is available on both ARCompact and ARCv2 ISA based
cores.
Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Cc: stable@vger.kernel.org
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
[vgupta: reworked changelog]
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In setup_arch_memory we reserve the memory area wherein the kernel
is located. Current implementation may reserve more memory than
it actually required in case of CONFIG_LINUX_LINK_BASE is not
equal to CONFIG_LINUX_RAM_BASE. This happens because we calculate
start of the reserved region relatively to the CONFIG_LINUX_RAM_BASE
and end of the region relatively to the CONFIG_LINUX_RAM_BASE.
For example in case of HSDK board we wasted 256MiB of physical memory:
------------------->8------------------------------
Memory: 770416K/1048576K available (5496K kernel code,
240K rwdata, 1064K rodata, 2200K init, 275K bss,
278160K reserved, 0K cma-reserved)
------------------->8------------------------------
Fix that.
Fixes: 9ed68785f7f2b ("ARC: mm: Decouple RAM base address from kernel link addr")
Cc: stable@vger.kernel.org #4.14+
Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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This commit removes redundant generic-y defines in
arch/arc/include/asm/Kbuild.
It is redundant to define generic-y when arch-specific implementation
exists in arch/$(ARCH)/include/asm/*.h
Remove the following generic-y:
dma-mapping.h
fb.h
kmap_types.h
pci.h
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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| CC mm/nobootmem.o
|In file included from ./include/asm-generic/bug.h:18:0,
| from ./arch/arc/include/asm/bug.h:32,
| from ./include/linux/bug.h:5,
| from ./include/linux/mmdebug.h:5,
| from ./include/linux/gfp.h:5,
| from ./include/linux/slab.h:15,
| from mm/nobootmem.c:14:
|mm/nobootmem.c: In function '__free_pages_memory':
|./include/linux/kernel.h:845:29: warning: comparison of distinct pointer types lacks a cast
| (!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
| ^
|./include/linux/kernel.h:859:4: note: in expansion of macro '__typecheck'
| (__typecheck(x, y) && __no_side_effects(x, y))
| ^~~~~~~~~~~
|./include/linux/kernel.h:869:24: note: in expansion of macro '__safe_cmp'
| __builtin_choose_expr(__safe_cmp(x, y), \
| ^~~~~~~~~~
|./include/linux/kernel.h:878:19: note: in expansion of macro '__careful_cmp'
| #define min(x, y) __careful_cmp(x, y, <)
| ^~~~~~~~~~~~~
|mm/nobootmem.c:104:11: note: in expansion of macro 'min'
| order = min(MAX_ORDER - 1UL, __ffs(start));
Change __ffs return value from 'int' to 'unsigned long' as it
is done in other implementations (like asm-generic, x86, etc...)
to avoid build-time warnings in places where type is strictly
checked.
As __ffs may return values in [0-31] interval changing return
type to unsigned is valid.
Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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This now prints the number of action points {2,4,8} and {min,full}
targets supported.
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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- LDFLAGS_vmlinux is cleared by the top Makefile
- 'all: vmlinux' is specified by the top Makefile
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
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- scripts/Kbuild.include already defined 'comma'
- The top Makefile has 'PHONY += FORCE'
- include/asm-*/ was moved to arch/*/include/asm/ a decade ago
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
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Commit f94c8d11699759 ("sched/clock, x86/tsc: Rework the x86 'unstable'
sched_clock() interface") broke Xen guest time handling across
migration:
[ 187.249951] Freezing user space processes ... (elapsed 0.001 seconds) done.
[ 187.251137] OOM killer disabled.
[ 187.251137] Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done.
[ 187.252299] suspending xenstore...
[ 187.266987] xen:grant_table: Grant tables using version 1 layout
[18446743811.706476] OOM killer enabled.
[18446743811.706478] Restarting tasks ... done.
[18446743811.720505] Setting capacity to 16777216
Fix that by setting xen_sched_clock_offset at resume time to ensure a
monotonic clock value.
[boris: replaced pr_info() with pr_info_once() in xen_callback_vector()
to avoid printing with incorrect timestamp during resume (as we
haven't re-adjusted the clock yet)]
Fixes: f94c8d11699759 ("sched/clock, x86/tsc: Rework the x86 'unstable' sched_clock() interface")
Cc: <stable@vger.kernel.org> # 4.11
Reported-by: Hans van Kranenburg <hans.van.kranenburg@mendix.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Tested-by: Hans van Kranenburg <hans.van.kranenburg@mendix.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
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This is exported by the top Makefile.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
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No one uses archmrproper.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
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Defining ARCH_SLAB_MINALIGN in arch/arm64/include/asm/cache.h when KASAN
is off is not needed, as it is defined in defined in include/linux/slab.h
as ifndef.
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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kaslr_early_init() is called with the kernel mapped at its
link time offset, and if it returns with a non-zero offset,
the kernel is unmapped and remapped again at the randomized
offset.
During its execution, kaslr_early_init() also randomizes the
base of the module region and of the linear mapping of DRAM,
and sets two variables accordingly. However, since these
variables are assigned with the caches on, they may get lost
during the cache maintenance that occurs when unmapping and
remapping the kernel, so ensure that these values are cleaned
to the PoC.
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Fixes: f80fb3a3d508 ("arm64: add support for kernel ASLR")
Cc: <stable@vger.kernel.org> # v4.6+
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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Since commit b89d82ef01b3 ("arm64: kpti: Avoid rewriting early page
tables when KASLR is enabled"), a kernel built with CONFIG_RANDOMIZE_BASE
can decide early whether to use non-global mappings by checking the
kaslr_offset().
A kernel built without CONFIG_RANDOMIZE_BASE, instead checks the
cpufeature static-key.
This leaves a gap where CONFIG_RANDOMIZE_BASE was enabled, no
kaslr seed was provided, but kpti was forced on using the cmdline
option.
When the decision is made late, kpti_install_ng_mappings() will re-write
the page tables, but arm64_kernel_use_ng_mappings()'s value does not
change as it only tests the cpufeature static-key if
CONFIG_RANDOMIZE_BASE is disabled.
This function influences PROT_DEFAULT via PTE_MAYBE_NG, and causes
pgattr_change_is_safe() to catch nG->G transitions when the unchanged
PROT_DEFAULT is used as part of PAGE_KERNEL_RO:
[ 1.942255] alternatives: patching kernel code
[ 1.998288] ------------[ cut here ]------------
[ 2.000693] kernel BUG at arch/arm64/mm/mmu.c:165!
[ 2.019215] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP
[ 2.020257] Modules linked in:
[ 2.020807] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.0.0-rc2 #51
[ 2.021917] Hardware name: linux,dummy-virt (DT)
[ 2.022790] pstate: 40000005 (nZcv daif -PAN -UAO)
[ 2.023742] pc : __create_pgd_mapping+0x508/0x6d0
[ 2.024671] lr : __create_pgd_mapping+0x500/0x6d0
[ 2.058059] Process swapper/0 (pid: 1, stack limit = 0x(____ptrval____))
[ 2.059369] Call trace:
[ 2.059845] __create_pgd_mapping+0x508/0x6d0
[ 2.060684] update_mapping_prot+0x48/0xd0
[ 2.061477] mark_linear_text_alias_ro+0xdc/0xe4
[ 2.070502] smp_cpus_done+0x90/0x98
[ 2.071216] smp_init+0x100/0x114
[ 2.071878] kernel_init_freeable+0xd4/0x220
[ 2.072750] kernel_init+0x10/0x100
[ 2.073455] ret_from_fork+0x10/0x18
[ 2.075414] ---[ end trace 3572f3a7782292de ]---
[ 2.076389] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
If arm64_kernel_unmapped_at_el0() is true, arm64_kernel_use_ng_mappings()
should also be true.
Signed-off-by: James Morse <james.morse@arm.com>
CC: Ard Biesheuvel <ard.biesheuvel@linaro.org>
CC: John Garry <john.garry@huawei.com>
CC: Will Deacon <will.deacon@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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After commit 5d32a66541c4 (PCI/ACPI: Allow ACPI to be built without
CONFIG_PCI set) dependencies on CONFIG_PCI that previously were
satisfied implicitly through dependencies on CONFIG_ACPI have to be
specified directly.
LPSS code relies on PCI infrastructure but this dependency has not
been called out explicitly yet.
Fixes: 5d32a66541c46 ("PCI/ACPI: Allow ACPI to be built without CONFIG_PCI set")
Signed-off-by: Sinan Kaya <okaya@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Commit
b6664ba42f14 ("s390, kexec_file: drop arch_kexec_mem_walk()")
changed the behavior of kexec_locate_mem_hole(): it will try to allocate
free memory only when kbuf.mem is initialized to zero.
However, x86's kexec_file_load() implementation reuses a struct
kexec_buf allocated on the stack and its kbuf.mem member gets set by
each kexec_add_buffer() invocation.
The second kexec_add_buffer() will reuse the same kbuf but not
reinitialize kbuf.mem.
Therefore, explictily reset kbuf.mem each time in order for
kexec_locate_mem_hole() to locate a free memory region each time.
[ bp: massage commit message. ]
Fixes: b6664ba42f14 ("s390, kexec_file: drop arch_kexec_mem_walk()")
Signed-off-by: Dave Young <dyoung@redhat.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Baoquan He <bhe@redhat.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: AKASHI Takahiro <takahiro.akashi@linaro.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Philipp Rudo <prudo@linux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Yannik Sembritzki <yannik@sembritzki.me>
Cc: Yi Wang <wang.yi59@zte.com.cn>
Cc: kexec@lists.infradead.org
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/20181228011247.GA9999@dhcp-128-65.nay.redhat.com
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Using sizeof(pointer) for determining the size of a memset() only works
when the size of the pointer and the size of type to which it points are
the same. For pte_t this is only true for 64bit and 32bit-NONPAE. On 32bit
PAE systems this is wrong as the pointer size is 4 byte but the PTE entry
is 8 bytes. It's actually not a real world issue as this code depends on
64bit, but it's wrong nevertheless.
Use sizeof(*p) for correctness sake.
Fixes: aad983913d77 ("x86/mm/encrypt: Simplify sme_populate_pgd() and sme_populate_pgd_large()")
Signed-off-by: Peng Hao <peng.hao2@zte.com.cn>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: dave.hansen@linux.intel.com
Cc: peterz@infradead.org
Cc: luto@kernel.org
Link: https://lkml.kernel.org/r/1546065252-97996-1-git-send-email-peng.hao2@zte.com.cn
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Recently in commit fbf508da7440 ("powerpc: split compat syscall table
out from native table") we changed the layout of the system call
table. Instead of having two entries for each syscall number, one for
the regular entry point and one for the compat entry point, we now
have separate tables for regular and compat entry points.
This inadvertently broke syscall tracing (CONFIG_FTRACE_SYSCALLS),
because our implementation of arch_syscall_addr() knew about the
layout of the table (it did nr * 2).
We can fix it just by dropping our version of arch_syscall_addr() and
using the generic version which does:
return (unsigned long)sys_call_table[nr];
Fixes: fbf508da7440 ("powerpc: split compat syscall table out from native table")
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Commit 3be2df00e299 ("powerpc/pseries/npu: Enable platform support")
added a call to pnv_npu2_init() in pseries code. This causes a build
break if we build with CONFIG_PPC_PSERIES && !CONFIG_PPC_POWERNV:
powerpc64le-pc-linux-gnu-ld: arch/powerpc/platforms/pseries/pci.o: in function `pSeries_final_fixup':
pci.c:(.init.text+0x1b0): undefined reference to `pnv_npu2_init'
This commit therefore wraps that line in an ifdef, so that pseries
builds without powernv.
Fixes: 3be2df00e299 ("powerpc/pseries/npu: Enable platform support")
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru>
[mpe: Frob change log a bit to blame a different commit]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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