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0a499fc5c3
19770 Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
Linus Torvalds
|
0a499fc5c3 |
Merge branch 'core-speculation-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull speculation mitigation update from Ingo Molnar: "This adds the "mitigations=" bootline option, which offers a cross-arch set of options that will work on x86, PowerPC and s390 that will map to the arch specific option internally" * 'core-speculation-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: s390/speculation: Support 'mitigations=' cmdline option powerpc/speculation: Support 'mitigations=' cmdline option x86/speculation: Support 'mitigations=' cmdline option cpu/speculation: Add 'mitigations=' cmdline option |
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Linus Torvalds
|
171c2bcbcb |
Merge branch 'core-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull unified TLB flushing from Ingo Molnar:
"This contains the generic mmu_gather feature from Peter Zijlstra,
which is an all-arch unification of TLB flushing APIs, via the
following (broad) steps:
- enhance the <asm-generic/tlb.h> APIs to cover more arch details
- convert most TLB flushing arch implementations to the generic
<asm-generic/tlb.h> APIs.
- remove leftovers of per arch implementations
After this series every single architecture makes use of the unified
TLB flushing APIs"
* 'core-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
mm/resource: Use resource_overlaps() to simplify region_intersects()
ia64/tlb: Eradicate tlb_migrate_finish() callback
asm-generic/tlb: Remove tlb_table_flush()
asm-generic/tlb: Remove tlb_flush_mmu_free()
asm-generic/tlb: Remove CONFIG_HAVE_GENERIC_MMU_GATHER
asm-generic/tlb: Remove arch_tlb*_mmu()
s390/tlb: Convert to generic mmu_gather
asm-generic/tlb: Introduce CONFIG_HAVE_MMU_GATHER_NO_GATHER=y
arch/tlb: Clean up simple architectures
um/tlb: Convert to generic mmu_gather
sh/tlb: Convert SH to generic mmu_gather
ia64/tlb: Convert to generic mmu_gather
arm/tlb: Convert to generic mmu_gather
asm-generic/tlb, arch: Invert CONFIG_HAVE_RCU_TABLE_INVALIDATE
asm-generic/tlb, ia64: Conditionally provide tlb_migrate_finish()
asm-generic/tlb: Provide generic tlb_flush() based on flush_tlb_mm()
asm-generic/tlb, arch: Provide generic tlb_flush() based on flush_tlb_range()
asm-generic/tlb, arch: Provide generic VIPT cache flush
asm-generic/tlb, arch: Provide CONFIG_HAVE_MMU_GATHER_PAGE_SIZE
asm-generic/tlb: Provide a comment
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Linus Torvalds
|
6203838dec |
powerpc fixes for 5.1 #7
One regression fix. Changes we merged to STRICT_KERNEL_RWX on 32-bit were causing crashes under load on some machines depending on memory layout. Thanks to: Christophe Leroy. -----BEGIN PGP SIGNATURE----- iQIcBAABAgAGBQJczY3sAAoJEFHr6jzI4aWA9UkP/3iM1wt/L3iYpmfPA0MJ4h4f oEB2WR4KFhBHcMbLKUNS0m9MfecAxHyrFXW46lnFbqVLbaJ3rBSRBitTySo1VnT3 wJKJi/rEf1uNmjxFTKRuE4eL1+4H2OVbwF+CLRB4jaILBmgDyvgYQDkeYQE689ut VjLA1C/8PRlKFO/82nGPaASdugqk4o+swxNxODhG+Bjv+9KGSinK4LN6zqyLoU/f aS4APLO59xd6vXosDZRiK6C5efoMu+8kAm8/pyA9E8+0TFTdrtZcPrbCme9Vj9xh i1Ruzxf9njZaSG37TQpgaFA/IKlSjBqAdaRmA6dy7fQ+GAOpt7YhtNIhk9prvOT6 uGarcHuusQ/Nhy0pb+Kt5H90RKzcZr/pgDEjhujJdCnVozQnX4fvkOjm8SvV6vc4 ucy2zzraMRo3OTvs38YAyGj/MPxOvMYZ1G+v/rAxpfvmdDl6KQ3uCvSczujP7qo6 49VfvfENGRTQhb+KSQtD4VtR9rFvMco5F8m1TFlYI1+RcoxHqqcR8aTK22wQvs45 2J97mkOvVeIp2pO7+yB5c2t3rPG9Qg9ARifnxXyF+9Cb1h1USy3vF2zUCj+wZSeP l+cYYcjrk/C6btDTVARMOXLKyeB4CWHaSCz8s3HIrXkuZsJbA3/qGi25mCWAEOVj 1qN6UpFNICtXOHBCAPYx =/m4Q -----END PGP SIGNATURE----- Merge tag 'powerpc-5.1-7' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc fix from Michael Ellerman: "One regression fix. Changes we merged to STRICT_KERNEL_RWX on 32-bit were causing crashes under load on some machines depending on memory layout. Thanks to Christophe Leroy" * tag 'powerpc-5.1-7' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc/32s: Fix BATs setting with CONFIG_STRICT_KERNEL_RWX |
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Linus Torvalds
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aa1be08f52 |
* PPC and ARM bugfixes from submaintainers
* Fix old Windows versions on AMD (recent regression) * Fix old Linux versions on processors without EPT * Fixes for LAPIC timer optimizations -----BEGIN PGP SIGNATURE----- iQFIBAABCAAyFiEE8TM4V0tmI4mGbHaCv/vSX3jHroMFAlzMc18UHHBib256aW5p QHJlZGhhdC5jb20ACgkQv/vSX3jHroNE0ggAj4c9FVC5aFeiBAj1YIcDijT3UtmG AjhoESE61rZI3PkZ5vcj2GC8eS7sKxExpCrQLsB5rLCF+7X90+tW155BHTHGU0ey ZgfGj23vlbZpvwZ4B5ujQ/Lmpry76pmy8EYekQogPP/eJxOB3oMk06tjh1mfSdIn D4Gj8jvYBB2ygAfmW91+YLLZos56id0N+Hyn/s95w4I1o6hKlkdpTOURAJKSGTb1 2t0+XADUt4ZwPM6+2X/eOBMGpeZP0/eR7H3kdyPy3ydm0sFjMiAAs0NbNp3eblB6 oqnytnGUPt8EEoq+wdZahLTbgJst2Ds++XAvVdBZED7zwGaBSETfg03eCg== =YP4M -----END PGP SIGNATURE----- Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm Pull KVM fixes from Paolo Bonzini: - PPC and ARM bugfixes from submaintainers - Fix old Windows versions on AMD (recent regression) - Fix old Linux versions on processors without EPT - Fixes for LAPIC timer optimizations * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (21 commits) KVM: nVMX: Fix size checks in vmx_set_nested_state KVM: selftests: make hyperv_cpuid test pass on AMD KVM: lapic: Check for in-kernel LAPIC before deferencing apic pointer KVM: fix KVM_CLEAR_DIRTY_LOG for memory slots of unaligned size x86/kvm/mmu: reset MMU context when 32-bit guest switches PAE KVM: x86: Whitelist port 0x7e for pre-incrementing %rip Documentation: kvm: fix dirty log ioctl arch lists KVM: VMX: Move RSB stuffing to before the first RET after VM-Exit KVM: arm/arm64: Don't emulate virtual timers on userspace ioctls kvm: arm: Skip stage2 huge mappings for unaligned ipa backed by THP KVM: arm/arm64: Ensure vcpu target is unset on reset failure KVM: lapic: Convert guest TSC to host time domain if necessary KVM: lapic: Allow user to disable adaptive tuning of timer advancement KVM: lapic: Track lapic timer advance per vCPU KVM: lapic: Disable timer advancement if adaptive tuning goes haywire x86: kvm: hyper-v: deal with buggy TLB flush requests from WS2012 KVM: x86: Consider LAPIC TSC-Deadline timer expired if deadline too short KVM: PPC: Book3S: Protect memslots while validating user address KVM: PPC: Book3S HV: Perserve PSSCR FAKE_SUSPEND bit on guest exit KVM: arm/arm64: vgic-v3: Retire pending interrupts on disabling LPIs ... |
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Christophe Leroy
|
12f363511d |
powerpc/32s: Fix BATs setting with CONFIG_STRICT_KERNEL_RWX
Serge reported some crashes with CONFIG_STRICT_KERNEL_RWX enabled
on a book3s32 machine.
Analysis shows two issues:
- BATs addresses and sizes are not properly aligned.
- There is a gap between the last address covered by BATs and the
first address covered by pages.
Memory mapped with DBATs:
0: 0xc0000000-0xc07fffff 0x00000000 Kernel RO coherent
1: 0xc0800000-0xc0bfffff 0x00800000 Kernel RO coherent
2: 0xc0c00000-0xc13fffff 0x00c00000 Kernel RW coherent
3: 0xc1400000-0xc23fffff 0x01400000 Kernel RW coherent
4: 0xc2400000-0xc43fffff 0x02400000 Kernel RW coherent
5: 0xc4400000-0xc83fffff 0x04400000 Kernel RW coherent
6: 0xc8400000-0xd03fffff 0x08400000 Kernel RW coherent
7: 0xd0400000-0xe03fffff 0x10400000 Kernel RW coherent
Memory mapped with pages:
0xe1000000-0xefffffff 0x21000000 240M rw present dirty accessed
This patch fixes both issues. With the patch, we get the following
which is as expected:
Memory mapped with DBATs:
0: 0xc0000000-0xc07fffff 0x00000000 Kernel RO coherent
1: 0xc0800000-0xc0bfffff 0x00800000 Kernel RO coherent
2: 0xc0c00000-0xc0ffffff 0x00c00000 Kernel RW coherent
3: 0xc1000000-0xc1ffffff 0x01000000 Kernel RW coherent
4: 0xc2000000-0xc3ffffff 0x02000000 Kernel RW coherent
5: 0xc4000000-0xc7ffffff 0x04000000 Kernel RW coherent
6: 0xc8000000-0xcfffffff 0x08000000 Kernel RW coherent
7: 0xd0000000-0xdfffffff 0x10000000 Kernel RW coherent
Memory mapped with pages:
0xe0000000-0xefffffff 0x20000000 256M rw present dirty accessed
Fixes:
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Linus Torvalds
|
0d82044e1b |
powerpc fixes for 5.1 #6
A one-liner to make our Radix MMU support depend on HUGETLB_PAGE. We use some of the hugetlb inlines (eg. pud_huge()) when operating on the linear mapping and if they're compiled into empty wrappers we can corrupt memory. Then two fixes to our VFIO IOMMU code. The first is not a regression but fixes the locking to avoid a user-triggerable deadlock. The second does fix a regression since rc1, and depends on the first fix. It makes it possible to run guests with large amounts of memory again (~256GB). Thanks to: Alexey Kardashevskiy. -----BEGIN PGP SIGNATURE----- iQIcBAABAgAGBQJcxUumAAoJEFHr6jzI4aWAEXwP/0x1hscWlJdpblLKc0Mh7kud MYUiEjxTsw2r8QeEJ5e3AtDh44DyuhrnL09w01vpsKMzVVC5vZDOQVXuAexeI8vO iv3pfpUhNyvNjpVDH1rHGJuQ4hJHIKr34GoNAhAfgW7yiZEvFOir2qd+bQm7KKgQ H2xvRiEXUJ3p1nVzOt2XYXEInTB2VWkwEfeNXLmh0AIySlAK1OLlrvZaZ4LzI7Bn Binbn+mIeftFWbXMOG8jhbiaTf6v9KQeWj5fTmaGEfBP3FBHjMQNf7krgCkq5Juh Ijxc20ardxBXeOq8E23q8+oAuGfpZjsKO3PPtl0r/Eyub65+FMP98//7iXvmwChL bkRwC+05LLMZPHYJ9UcWBKreEy1BDzb7nPWzvGkSyXnOVylavw+xZk22imAj/5pk auuuizTpTrW8c9WDYoWDkBVfbOOo44o4Eor51pYbC8Tq6cOkIYA6uO80JAD9yz6L FuKwrapMYKo779LAiX6u46iB6AVAaq/2TktwwnyZSqmj/oIiwNMKhrlENiO+CwgH PvDkrs0HA02F9nyHUreIQr5DQDgrgw4ZnMsatxvzBu/zBoe2RITfRms4c8WmKb+w y63ezFx4+FiFQGkniEY5/+o7ewpUFw6JyjKI+Q02tFKUKnq+iZQHtMxgJgxswxN/ k8EUzlyS2ZY8d7vHHQ4u =oJ9o -----END PGP SIGNATURE----- Merge tag 'powerpc-5.1-6' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc fixes from Michael Ellerman: "A one-liner to make our Radix MMU support depend on HUGETLB_PAGE. We use some of the hugetlb inlines (eg. pud_huge()) when operating on the linear mapping and if they're compiled into empty wrappers we can corrupt memory. Then two fixes to our VFIO IOMMU code. The first is not a regression but fixes the locking to avoid a user-triggerable deadlock. The second does fix a regression since rc1, and depends on the first fix. It makes it possible to run guests with large amounts of memory again (~256GB). Thanks to Alexey Kardashevskiy" * tag 'powerpc-5.1-6' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc/mm_iommu: Allow pinning large regions powerpc/mm_iommu: Fix potential deadlock powerpc/mm/radix: Make Radix require HUGETLB_PAGE |
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Linus Torvalds
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d286e13d53 |
arch: add pidfd and io_uring syscalls everywhere
This comes a bit late, but should be in 5.1 anyway: we want the newly added system calls to be synchronized across all architectures in the release. I hope that in the future, any newly added system calls can be added to all architectures at the same time, and tested there while they are in linux-next, avoiding dependencies between the architecture maintainer trees and the tree that contains the new system call. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAABCAAGBQJcv2aZAAoJEGCrR//JCVIncu4QALpTBqbjSu9u1/nXRGMLWo9J uToSBohDvsKW7wMkHcr1dU75ERIX9gqIY5pJWDrwzBdGDt02/oiy6WofXZDv4WkR Sp4YncdTeZENi0nNN+mrGDzNrcvBJd0FRc1MSLgPzfKXgf8P1oRzEsOaJVlGY5hS A8rNNUYE37m6rhTS59tNxzGvQcq3J7Q9ZRc0xjbSqIFngYVfQQiVbQCqd8RI6s9W +Hek+e5VF5HQnzhmTT9MQM4TsxMRMNfzrYpjhhayuLJ3CHROJPX7x9pZEGdyusQS 5rDZxKes9SKTFS9QqycSyJkoP0awxrVrjqD1zFkWOJht0c3UCQAmw6GD7rlJkGPB vofuzmPzMq5XaZ8vpTucWNL+0ymzRXhhQ6esV39vRwxztRc4/DCy5MHDnrPK5yXb olPbltMAlHMaY5KePI/3jwpkcmzZjz9SNOKQ9/9tFlB5+RVF2qQdUgRMPE+XYa4H pRrZChrEAf6ZjINGeLlIVtpTlBFPl1LRF7UkOy7TYBvtRqukduXYpOFPb1XspQUl flIdBLOY3iF33o0eQnz10BEMxlblFhTj0SQrt0684kili7TjsWDaT+hPZSd72hhi Wey9l39kaexV2Sh7XZ6oUe205ay3R8sTn0Ic2+CnZaboeOuYlLYc8/w2HkTeTYmu 9f3HAlX4Qu6RuX8bxLO0 =Y7Kd -----END PGP SIGNATURE----- Merge tag 'syscalls-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic Pull syscall numbering updates from Arnd Bergmann: "arch: add pidfd and io_uring syscalls everywhere This comes a bit late, but should be in 5.1 anyway: we want the newly added system calls to be synchronized across all architectures in the release. I hope that in the future, any newly added system calls can be added to all architectures at the same time, and tested there while they are in linux-next, avoiding dependencies between the architecture maintainer trees and the tree that contains the new system call" * tag 'syscalls-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: arch: add pidfd and io_uring syscalls everywhere |
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Paolo Bonzini
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78671ab4c9 |
KVM/PPC fixes for 5.1
- Fix host hang in the HTM assist code for POWER9 - Take srcu read lock around memslot lookup -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQEcBAABCAAGBQJcpup1AAoJEJ2a6ncsY3Gf9cUIAOdI0vtysd+jq2De+cxUe/8i qUm7ybYQQQQ+aOwapnw+BIvy3JbE2KFZ2AZQGldCBHYK/m1KrX7Gdt21kAcSouHL 74xTCqOooG1XCJlek2wj2JCKkWbrm9K1i6WfYKNN4lnzgc4qaJxPQL0ikiZPfCkR 7R+ulWmFDZ6ea5gjzGP93zzbq8RKaUnpwGcWVMvIOX2xwonAmZG1fxAu3d5NwUoy kXOXGdvmExsUsGWnwxJemqCdVj48pX34d+/263Y561/Bj7LotErdZQC+cTn/R8lL TSfmKfulMb1zAJCqcuQy4x6rY0q579yPbTF/PKSl+hOLG1t9y86fERsAVxAPiTo= =NzJU -----END PGP SIGNATURE----- Merge tag 'kvm-ppc-fixes-5.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc into HEAD KVM/PPC fixes for 5.1 - Fix host hang in the HTM assist code for POWER9 - Take srcu read lock around memslot lookup |
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Josh Poimboeuf
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782e69efb3 |
powerpc/speculation: Support 'mitigations=' cmdline option
Configure powerpc CPU runtime speculation bug mitigations in accordance with the 'mitigations=' cmdline option. This affects Meltdown, Spectre v1, Spectre v2, and Speculative Store Bypass. The default behavior is unchanged. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Jiri Kosina <jkosina@suse.cz> (on x86) Reviewed-by: Jiri Kosina <jkosina@suse.cz> Cc: Borislav Petkov <bp@alien8.de> Cc: "H . Peter Anvin" <hpa@zytor.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Jiri Kosina <jikos@kernel.org> Cc: Waiman Long <longman@redhat.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Jon Masters <jcm@redhat.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: linuxppc-dev@lists.ozlabs.org Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: linux-s390@vger.kernel.org Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: linux-arm-kernel@lists.infradead.org Cc: linux-arch@vger.kernel.org Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Tyler Hicks <tyhicks@canonical.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Steven Price <steven.price@arm.com> Cc: Phil Auld <pauld@redhat.com> Link: https://lkml.kernel.org/r/245a606e1a42a558a310220312d9b6adb9159df6.1555085500.git.jpoimboe@redhat.com |
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Alexey Kardashevskiy
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7a3a4d7638 |
powerpc/mm_iommu: Allow pinning large regions
When called with vmas_arg==NULL, get_user_pages_longterm() allocates
an array of nr_pages*8 which can easily get greater that the max order,
for example, registering memory for a 256GB guest does this and fails
in __alloc_pages_nodemask().
This adds a loop over chunks of entries to fit the max order limit.
Fixes:
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Alexey Kardashevskiy
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eb9d7a62c3 |
powerpc/mm_iommu: Fix potential deadlock
Currently mm_iommu_do_alloc() is called in 2 cases:
- VFIO_IOMMU_SPAPR_REGISTER_MEMORY ioctl() for normal memory:
this locks &mem_list_mutex and then locks mm::mmap_sem
several times when adjusting locked_vm or pinning pages;
- vfio_pci_nvgpu_regops::mmap() for GPU memory:
this is called with mm::mmap_sem held already and it locks
&mem_list_mutex.
So one can craft a userspace program to do special ioctl and mmap in
2 threads concurrently and cause a deadlock which lockdep warns about
(below).
We did not hit this yet because QEMU constructs the machine in a single
thread.
This moves the overlap check next to where the new entry is added and
reduces the amount of time spent with &mem_list_mutex held.
This moves locked_vm adjustment from under &mem_list_mutex.
This relies on mm_iommu_adjust_locked_vm() doing nothing when entries==0.
This is one of the lockdep warnings:
======================================================
WARNING: possible circular locking dependency detected
5.1.0-rc2-le_nv2_aikATfstn1-p1 #363 Not tainted
------------------------------------------------------
qemu-system-ppc/8038 is trying to acquire lock:
000000002ec6c453 (mem_list_mutex){+.+.}, at: mm_iommu_do_alloc+0x70/0x490
but task is already holding lock:
00000000fd7da97f (&mm->mmap_sem){++++}, at: vm_mmap_pgoff+0xf0/0x160
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (&mm->mmap_sem){++++}:
lock_acquire+0xf8/0x260
down_write+0x44/0xa0
mm_iommu_adjust_locked_vm.part.1+0x4c/0x190
mm_iommu_do_alloc+0x310/0x490
tce_iommu_ioctl.part.9+0xb84/0x1150 [vfio_iommu_spapr_tce]
vfio_fops_unl_ioctl+0x94/0x430 [vfio]
do_vfs_ioctl+0xe4/0x930
ksys_ioctl+0xc4/0x110
sys_ioctl+0x28/0x80
system_call+0x5c/0x70
-> #0 (mem_list_mutex){+.+.}:
__lock_acquire+0x1484/0x1900
lock_acquire+0xf8/0x260
__mutex_lock+0x88/0xa70
mm_iommu_do_alloc+0x70/0x490
vfio_pci_nvgpu_mmap+0xc0/0x130 [vfio_pci]
vfio_pci_mmap+0x198/0x2a0 [vfio_pci]
vfio_device_fops_mmap+0x44/0x70 [vfio]
mmap_region+0x5d4/0x770
do_mmap+0x42c/0x650
vm_mmap_pgoff+0x124/0x160
ksys_mmap_pgoff+0xdc/0x2f0
sys_mmap+0x40/0x80
system_call+0x5c/0x70
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&mm->mmap_sem);
lock(mem_list_mutex);
lock(&mm->mmap_sem);
lock(mem_list_mutex);
*** DEADLOCK ***
1 lock held by qemu-system-ppc/8038:
#0: 00000000fd7da97f (&mm->mmap_sem){++++}, at: vm_mmap_pgoff+0xf0/0x160
Fixes:
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Michael Ellerman
|
8adddf349f |
powerpc/mm/radix: Make Radix require HUGETLB_PAGE
Joel reported weird crashes using skiroot_defconfig, in his case we
jumped into an NX page:
kernel tried to execute exec-protected page (c000000002bff4f0) - exploit attempt? (uid: 0)
BUG: Unable to handle kernel instruction fetch
Faulting instruction address: 0xc000000002bff4f0
Looking at the disassembly, we had simply branched to that address:
c000000000c001bc 49fff335 bl c000000002bff4f0
But that didn't match the original kernel image:
c000000000c001bc 4bfff335 bl c000000000bff4f0 <kobject_get+0x8>
When STRICT_KERNEL_RWX is enabled, and we're using the radix MMU, we
call radix__change_memory_range() late in boot to change page
protections. We do that both to mark rodata read only and also to mark
init text no-execute. That involves walking the kernel page tables,
and clearing _PAGE_WRITE or _PAGE_EXEC respectively.
With radix we may use hugepages for the linear mapping, so the code in
radix__change_memory_range() uses eg. pmd_huge() to test if it has
found a huge mapping, and if so it stops the page table walk and
changes the PMD permissions.
However if the kernel is built without HUGETLBFS support, pmd_huge()
is just a #define that always returns 0. That causes the code in
radix__change_memory_range() to incorrectly interpret the PMD value as
a pointer to a PTE page rather than as a PTE at the PMD level.
We can see this using `dv` in xmon which also uses pmd_huge():
0:mon> dv c000000000000000
pgd @ 0xc000000001740000
pgdp @ 0xc000000001740000 = 0x80000000ffffb009
pudp @ 0xc0000000ffffb000 = 0x80000000ffffa009
pmdp @ 0xc0000000ffffa000 = 0xc00000000000018f <- this is a PTE
ptep @ 0xc000000000000100 = 0xa64bb17da64ab07d <- kernel text
The end result is we treat the value at 0xc000000000000100 as a PTE
and clear _PAGE_WRITE or _PAGE_EXEC, potentially corrupting the code
at that address.
In Joel's specific case we cleared the sign bit in the offset of the
branch, causing a backward branch to turn into a forward branch which
caused us to branch into a non-executable page. However the exact
nature of the crash depends on kernel version, compiler version, and
other factors.
We need to fix radix__change_memory_range() to not use accessors that
depend on HUGETLBFS, but we also have radix memory hotplug code that
uses pmd_huge() etc that will also need fixing. So for now just
disallow the broken combination of Radix with HUGETLBFS disabled.
The only defconfig we have that is affected is skiroot_defconfig, so
turn on HUGETLBFS there so that it still gets Radix.
Fixes:
|
||
Arnd Bergmann
|
39036cd272 |
arch: add pidfd and io_uring syscalls everywhere
Add the io_uring and pidfd_send_signal system calls to all architectures. These system calls are designed to handle both native and compat tasks, so all entries are the same across architectures, only arm-compat and the generic tale still use an old format. Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> (s390) Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de> |
||
|
Linus Torvalds
|
cf60528f8a |
powerpc fixes for 5.1 #5
A minor build fix for 64-bit FLATMEM configs. A fix for a boot failure on 32-bit powermacs. My commit to fix CLOCK_MONOTONIC across Y2038 broke the 32-bit VDSO on 64-bit kernels, ie. compat mode, which is only used on big endian. The rewrite of the SLB code we merged in 4.20 missed the fact that the 0x380 exception is also used with the Radix MMU to report out of range accesses. This could lead to an oops if userspace tried to read from addresses outside the user or kernel range. Thanks to: Aneesh Kumar K.V, Christophe Leroy, Larry Finger, Nicholas Piggin. -----BEGIN PGP SIGNATURE----- iQIcBAABAgAGBQJcsVzhAAoJEFHr6jzI4aWAJuAP/2oLukNIIiF2UW/18xIXfvxR ZA9JljVqcKUHEUR4W+Y673xL4ZKtGGF79P+bzSvh8fUTMJ9cIN9mLO7eGGoDNqTn XhZX/jxJOh34tbHPYYbi9kYqWpZQKN4WuCjMQSPBCHOHMdx/0yn0wKgriOW1cuzG AQqDRHcRX4h1QT9o/hnsCAsdcnLEntdBBCTTHL1dZ8BucuUopjL+7cV0wf4qFIui e9SXOEl7yV03JGurmWcipE4mj9SrUioZJyHg6rJs70tlCUHFM24LQEFNIM4WczuF GoPfzXi5nNPrOzC3aF/v77hT5t4zD2sPRV2DuKABGsS+gfPoK8sIZC3mo7Vk5y+j gsbmkQSZt8/wVhRuAA0m0N6Aqg1J8NjhxoDfyM8kj0FzPe75D662VIgGSx15oMkl 3olt/9uDyPetxuZ7tmmnFC8wkcmyaGpVurVz9xnqpt6c2r0KI+16R6Mk4OiT/e2p KNVBFkqRTp23ETpI8J9HUk9OtFIHqE9Zwzk2YOrX5yuLHByEwMq1T4qn2RuQsJqx RWPJagSalGLmM6dqDGe08gQl9rovkYKleGxNIAJuJB9rIxZQke86d2+S0eSUQbAW WWhP8SU0LJ5gmhEeZi5MntcuG+gcENwkz2UBK5nVDBVLFxGuBTPQATavW+w1bSi+ SSEMXx8dNAOvsrqrZ97I =pfZc -----END PGP SIGNATURE----- Merge tag 'powerpc-5.1-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc fixes from Michael Ellerman: "A minor build fix for 64-bit FLATMEM configs. A fix for a boot failure on 32-bit powermacs. My commit to fix CLOCK_MONOTONIC across Y2038 broke the 32-bit VDSO on 64-bit kernels, ie. compat mode, which is only used on big endian. The rewrite of the SLB code we merged in 4.20 missed the fact that the 0x380 exception is also used with the Radix MMU to report out of range accesses. This could lead to an oops if userspace tried to read from addresses outside the user or kernel range. Thanks to: Aneesh Kumar K.V, Christophe Leroy, Larry Finger, Nicholas Piggin" * tag 'powerpc-5.1-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc/mm: Define MAX_PHYSMEM_BITS for all 64-bit configs powerpc/64s/radix: Fix radix segment exception handling powerpc/vdso32: fix CLOCK_MONOTONIC on PPC64 powerpc/32: Fix early boot failure with RTAS built-in |
||
|
Michael Ellerman
|
cf7cf6977f |
powerpc/mm: Define MAX_PHYSMEM_BITS for all 64-bit configs
The recent commit |
||
Nicholas Piggin
|
7100e8704b |
powerpc/64s/radix: Fix radix segment exception handling
Commit |
||
|
Christophe Leroy
|
dd9a994fc6 |
powerpc/vdso32: fix CLOCK_MONOTONIC on PPC64
Commit |
||
|
Linus Torvalds
|
f654f0fc0b |
Merge branch 'akpm' (patches from Andrew)
Merge misc fixes from Andrew Morton: "14 fixes" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: kernel/sysctl.c: fix out-of-bounds access when setting file-max mm/util.c: fix strndup_user() comment sh: fix multiple function definition build errors MAINTAINERS: add maintainer and replacing reviewer ARM/NUVOTON NPCM MAINTAINERS: fix bad pattern in ARM/NUVOTON NPCM mm: writeback: use exact memcg dirty counts psi: clarify the units used in pressure files mm/huge_memory.c: fix modifying of page protection by insert_pfn_pmd() hugetlbfs: fix memory leak for resv_map mm: fix vm_fault_t cast in VM_FAULT_GET_HINDEX() lib/lzo: fix bugs for very short or empty input include/linux/bitrev.h: fix constant bitrev kmemleak: powerpc: skip scanning holes in the .bss section lib/string.c: implement a basic bcmp |
||
Catalin Marinas
|
298a32b132 |
kmemleak: powerpc: skip scanning holes in the .bss section
Commit
|
||
Steven Rostedt (VMware)
|
32d9258662 |
syscalls: Remove start and number from syscall_set_arguments() args
After removing the start and count arguments of syscall_get_arguments() it seems reasonable to remove them from syscall_set_arguments(). Note, as of today, there are no users of syscall_set_arguments(). But we are told that there will be soon. But for now, at least make it consistent with syscall_get_arguments(). Link: http://lkml.kernel.org/r/20190327222014.GA32540@altlinux.org Cc: Oleg Nesterov <oleg@redhat.com> Cc: Kees Cook <keescook@chromium.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Cc: Dave Martin <dave.martin@arm.com> Cc: "Dmitry V. Levin" <ldv@altlinux.org> Cc: x86@kernel.org Cc: linux-snps-arc@lists.infradead.org Cc: linux-kernel@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-c6x-dev@linux-c6x.org Cc: uclinux-h8-devel@lists.sourceforge.jp Cc: linux-hexagon@vger.kernel.org Cc: linux-ia64@vger.kernel.org Cc: linux-mips@vger.kernel.org Cc: nios2-dev@lists.rocketboards.org Cc: openrisc@lists.librecores.org Cc: linux-parisc@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-riscv@lists.infradead.org Cc: linux-s390@vger.kernel.org Cc: linux-sh@vger.kernel.org Cc: sparclinux@vger.kernel.org Cc: linux-um@lists.infradead.org Cc: linux-xtensa@linux-xtensa.org Cc: linux-arch@vger.kernel.org Acked-by: Max Filippov <jcmvbkbc@gmail.com> # For xtensa changes Acked-by: Will Deacon <will.deacon@arm.com> # For the arm64 bits Reviewed-by: Thomas Gleixner <tglx@linutronix.de> # for x86 Reviewed-by: Dmitry V. Levin <ldv@altlinux.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> |
||
|
Steven Rostedt (Red Hat)
|
b35f549df1 |
syscalls: Remove start and number from syscall_get_arguments() args
At Linux Plumbers, Andy Lutomirski approached me and pointed out that the function call syscall_get_arguments() implemented in x86 was horribly written and not optimized for the standard case of passing in 0 and 6 for the starting index and the number of system calls to get. When looking at all the users of this function, I discovered that all instances pass in only 0 and 6 for these arguments. Instead of having this function handle different cases that are never used, simply rewrite it to return the first 6 arguments of a system call. This should help out the performance of tracing system calls by ptrace, ftrace and perf. Link: http://lkml.kernel.org/r/20161107213233.754809394@goodmis.org Cc: Oleg Nesterov <oleg@redhat.com> Cc: Kees Cook <keescook@chromium.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Cc: Dave Martin <dave.martin@arm.com> Cc: "Dmitry V. Levin" <ldv@altlinux.org> Cc: x86@kernel.org Cc: linux-snps-arc@lists.infradead.org Cc: linux-kernel@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-c6x-dev@linux-c6x.org Cc: uclinux-h8-devel@lists.sourceforge.jp Cc: linux-hexagon@vger.kernel.org Cc: linux-ia64@vger.kernel.org Cc: linux-mips@vger.kernel.org Cc: nios2-dev@lists.rocketboards.org Cc: openrisc@lists.librecores.org Cc: linux-parisc@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-riscv@lists.infradead.org Cc: linux-s390@vger.kernel.org Cc: linux-sh@vger.kernel.org Cc: sparclinux@vger.kernel.org Cc: linux-um@lists.infradead.org Cc: linux-xtensa@linux-xtensa.org Cc: linux-arch@vger.kernel.org Acked-by: Paul Burton <paul.burton@mips.com> # MIPS parts Acked-by: Max Filippov <jcmvbkbc@gmail.com> # For xtensa changes Acked-by: Will Deacon <will.deacon@arm.com> # For the arm64 bits Reviewed-by: Thomas Gleixner <tglx@linutronix.de> # for x86 Reviewed-by: Dmitry V. Levin <ldv@altlinux.org> Reported-by: Andy Lutomirski <luto@amacapital.net> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> |
||
|
Alexey Kardashevskiy
|
345077c8e1 |
KVM: PPC: Book3S: Protect memslots while validating user address
Guest physical to user address translation uses KVM memslots and reading
these requires holding the kvm->srcu lock. However recently introduced
kvmppc_tce_validate() broke the rule (see the lockdep warning below).
This moves srcu_read_lock(&vcpu->kvm->srcu) earlier to protect
kvmppc_tce_validate() as well.
=============================
WARNING: suspicious RCU usage
5.1.0-rc2-le_nv2_aikATfstn1-p1 #380 Not tainted
-----------------------------
include/linux/kvm_host.h:605 suspicious rcu_dereference_check() usage!
other info that might help us debug this:
rcu_scheduler_active = 2, debug_locks = 1
1 lock held by qemu-system-ppc/8020:
#0: 0000000094972fe9 (&vcpu->mutex){+.+.}, at: kvm_vcpu_ioctl+0xdc/0x850 [kvm]
stack backtrace:
CPU: 44 PID: 8020 Comm: qemu-system-ppc Not tainted 5.1.0-rc2-le_nv2_aikATfstn1-p1 #380
Call Trace:
[c000003fece8f740] [c000000000bcc134] dump_stack+0xe8/0x164 (unreliable)
[c000003fece8f790] [c000000000181be0] lockdep_rcu_suspicious+0x130/0x170
[c000003fece8f810] [c0000000000d5f50] kvmppc_tce_to_ua+0x280/0x290
[c000003fece8f870] [c00800001a7e2c78] kvmppc_tce_validate+0x80/0x1b0 [kvm]
[c000003fece8f8e0] [c00800001a7e3fac] kvmppc_h_put_tce+0x94/0x3e4 [kvm]
[c000003fece8f9a0] [c00800001a8baac4] kvmppc_pseries_do_hcall+0x30c/0xce0 [kvm_hv]
[c000003fece8fa10] [c00800001a8bd89c] kvmppc_vcpu_run_hv+0x694/0xec0 [kvm_hv]
[c000003fece8fae0] [c00800001a7d95dc] kvmppc_vcpu_run+0x34/0x48 [kvm]
[c000003fece8fb00] [c00800001a7d56bc] kvm_arch_vcpu_ioctl_run+0x2f4/0x400 [kvm]
[c000003fece8fb90] [c00800001a7c3618] kvm_vcpu_ioctl+0x460/0x850 [kvm]
[c000003fece8fd00] [c00000000041c4f4] do_vfs_ioctl+0xe4/0x930
[c000003fece8fdb0] [c00000000041ce04] ksys_ioctl+0xc4/0x110
[c000003fece8fe00] [c00000000041ce78] sys_ioctl+0x28/0x80
[c000003fece8fe20] [c00000000000b5a4] system_call+0x5c/0x70
Fixes:
|
||
Suraj Jitindar Singh
|
7cb9eb106d |
KVM: PPC: Book3S HV: Perserve PSSCR FAKE_SUSPEND bit on guest exit
There is a hardware bug in some POWER9 processors where a treclaim in
fake suspend mode can cause an inconsistency in the XER[SO] bit across
the threads of a core, the workaround being to force the core into SMT4
when doing the treclaim.
The FAKE_SUSPEND bit (bit 10) in the PSSCR is used to control whether a
thread is in fake suspend or real suspend. The important difference here
being that thread reconfiguration is blocked in real suspend but not
fake suspend mode.
When we exit a guest which was in fake suspend mode, we force the core
into SMT4 while we do the treclaim in kvmppc_save_tm_hv().
However on the new exit path introduced with the function
kvmhv_run_single_vcpu() we restore the host PSSCR before calling
kvmppc_save_tm_hv() which means that if we were in fake suspend mode we
put the thread into real suspend mode when we clear the
PSSCR[FAKE_SUSPEND] bit. This means that we block thread reconfiguration
and the thread which is trying to get the core into SMT4 before it can
do the treclaim spins forever since it itself is blocking thread
reconfiguration. The result is that that core is essentially lost.
This results in a trace such as:
[ 93.512904] CPU: 7 PID: 13352 Comm: qemu-system-ppc Not tainted 5.0.0 #4
[ 93.512905] NIP: c000000000098a04 LR: c0000000000cc59c CTR: 0000000000000000
[ 93.512908] REGS: c000003fffd2bd70 TRAP: 0100 Not tainted (5.0.0)
[ 93.512908] MSR: 9000000302883033 <SF,HV,VEC,VSX,FP,ME,IR,DR,RI,LE,TM[SE]> CR: 22222444 XER: 00000000
[ 93.512914] CFAR: c000000000098a5c IRQMASK: 3
[ 93.512915] PACATMSCRATCH: 0000000000000001
[ 93.512916] GPR00: 0000000000000001 c000003f6cc1b830 c000000001033100 0000000000000004
[ 93.512928] GPR04: 0000000000000004 0000000000000002 0000000000000004 0000000000000007
[ 93.512930] GPR08: 0000000000000000 0000000000000004 0000000000000000 0000000000000004
[ 93.512932] GPR12: c000203fff7fc000 c000003fffff9500 0000000000000000 0000000000000000
[ 93.512935] GPR16: 2000000000300375 000000000000059f 0000000000000000 0000000000000000
[ 93.512951] GPR20: 0000000000000000 0000000000080053 004000000256f41f c000003f6aa88ef0
[ 93.512953] GPR24: c000003f6aa89100 0000000000000010 0000000000000000 0000000000000000
[ 93.512956] GPR28: c000003f9e9a0800 0000000000000000 0000000000000001 c000203fff7fc000
[ 93.512959] NIP [c000000000098a04] pnv_power9_force_smt4_catch+0x1b4/0x2c0
[ 93.512960] LR [c0000000000cc59c] kvmppc_save_tm_hv+0x40/0x88
[ 93.512960] Call Trace:
[ 93.512961] [c000003f6cc1b830] [0000000000080053] 0x80053 (unreliable)
[ 93.512965] [c000003f6cc1b8a0] [c00800001e9cb030] kvmhv_p9_guest_entry+0x508/0x6b0 [kvm_hv]
[ 93.512967] [c000003f6cc1b940] [c00800001e9cba44] kvmhv_run_single_vcpu+0x2dc/0xb90 [kvm_hv]
[ 93.512968] [c000003f6cc1ba10] [c00800001e9cc948] kvmppc_vcpu_run_hv+0x650/0xb90 [kvm_hv]
[ 93.512969] [c000003f6cc1bae0] [c00800001e8f620c] kvmppc_vcpu_run+0x34/0x48 [kvm]
[ 93.512971] [c000003f6cc1bb00] [c00800001e8f2d4c] kvm_arch_vcpu_ioctl_run+0x2f4/0x400 [kvm]
[ 93.512972] [c000003f6cc1bb90] [c00800001e8e3918] kvm_vcpu_ioctl+0x460/0x7d0 [kvm]
[ 93.512974] [c000003f6cc1bd00] [c0000000003ae2c0] do_vfs_ioctl+0xe0/0x8e0
[ 93.512975] [c000003f6cc1bdb0] [c0000000003aeb24] ksys_ioctl+0x64/0xe0
[ 93.512978] [c000003f6cc1be00] [c0000000003aebc8] sys_ioctl+0x28/0x80
[ 93.512981] [c000003f6cc1be20] [c00000000000b3a4] system_call+0x5c/0x70
[ 93.512983] Instruction dump:
[ 93.512986] 419dffbc e98c0000 2e8b0000 38000001 60000000 60000000 60000000 40950068
[ 93.512993] 392bffff 39400000 79290020 39290001 <7d2903a6> 60000000 60000000 7d235214
To fix this we preserve the PSSCR[FAKE_SUSPEND] bit until we call
kvmppc_save_tm_hv() which will mean the core can get into SMT4 and
perform the treclaim. Note kvmppc_save_tm_hv() clears the
PSSCR[FAKE_SUSPEND] bit again so there is no need to explicitly do that.
Fixes:
|
||
Peter Zijlstra
|
96bc9567cb |
asm-generic/tlb, arch: Invert CONFIG_HAVE_RCU_TABLE_INVALIDATE
Make issuing a TLB invalidate for page-table pages the normal case. The reason is twofold: - too many invalidates is safer than too few, - most architectures use the linux page-tables natively and would thus require this. Make it an opt-out, instead of an opt-in. No change in behavior intended. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Will Deacon <will.deacon@arm.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rik van Riel <riel@surriel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@kernel.org> |
||
|
Peter Zijlstra
|
5f307be18b |
asm-generic/tlb, arch: Provide generic tlb_flush() based on flush_tlb_range()
Provide a generic tlb_flush() implementation that relies on flush_tlb_range(). This is a little awkward because flush_tlb_range() assumes a VMA for range invalidation, but we no longer have one. Audit of all flush_tlb_range() implementations shows only vma->vm_mm and vma->vm_flags are used, and of the latter only VM_EXEC (I-TLB invalidates) and VM_HUGETLB (large TLB invalidate) are used. Therefore, track VM_EXEC and VM_HUGETLB in two more bits, and create a 'fake' VMA. This allows architectures that have a reasonably efficient flush_tlb_range() to not require any additional effort. No change in behavior intended. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Will Deacon <will.deacon@arm.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@kernel.org> Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Nick Piggin <npiggin@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rik van Riel <riel@surriel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@kernel.org> |
||
|
Peter Zijlstra
|
ed6a79352c |
asm-generic/tlb, arch: Provide CONFIG_HAVE_MMU_GATHER_PAGE_SIZE
Move the mmu_gather::page_size things into the generic code instead of PowerPC specific bits. No change in behavior intended. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Will Deacon <will.deacon@arm.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@kernel.org> Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Nick Piggin <npiggin@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rik van Riel <riel@surriel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@kernel.org> |
||
|
Christophe Leroy
|
fd427103e8 |
powerpc/32: Fix early boot failure with RTAS built-in
Commit |
||
|
Linus Torvalds
|
6536c5f2c8 |
powerpc fixes for 5.1 #4
Three non-regression fixes.
Our optimised memcmp could read past the end of one of the buffers and
potentially trigger a page fault leading to an oops.
Some of our code to read energy management data on PowerVM had an endian bug
leading to bogus results.
When reporting a machine check exception we incorrectly reported TLB multihits
as D-Cache multhits due to a missing entry in the array of causes.
Thanks to:
Chandan Rajendra, Gautham R. Shenoy, Mahesh Salgaonkar, Segher Boessenkool,
Vaidyanathan Srinivasan.
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Merge tag 'powerpc-5.1-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
"Three non-regression fixes.
- Our optimised memcmp could read past the end of one of the buffers
and potentially trigger a page fault leading to an oops.
- Some of our code to read energy management data on PowerVM had an
endian bug leading to bogus results.
- When reporting a machine check exception we incorrectly reported
TLB multihits as D-Cache multhits due to a missing entry in the
array of causes.
Thanks to: Chandan Rajendra, Gautham R. Shenoy, Mahesh Salgaonkar,
Segher Boessenkool, Vaidyanathan Srinivasan"
* tag 'powerpc-5.1-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/pseries/mce: Fix misleading print for TLB mutlihit
powerpc/pseries/energy: Use OF accessor functions to read ibm,drc-indexes
powerpc/64: Fix memcmp reading past the end of src/dest
|
||
Mahesh Salgaonkar
|
6f845ebec2 |
powerpc/pseries/mce: Fix misleading print for TLB mutlihit
On pseries, TLB multihit are reported as D-Cache Multihit. This is because
the wrongly populated mc_err_types[] array. Per PAPR, TLB error type is 0x04
and mc_err_types[4] points to "D-Cache" instead of "TLB" string. Fixup the
mc_err_types[] array.
Machine check error type per PAPR:
0x00 = Uncorrectable Memory Error (UE)
0x01 = SLB error
0x02 = ERAT Error
0x04 = TLB error
0x05 = D-Cache error
0x07 = I-Cache error
Fixes:
|
||
|
Linus Torvalds
|
1a9df9e29c |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull networking fixes from David Miller:
"Fixes here and there, a couple new device IDs, as usual:
1) Fix BQL race in dpaa2-eth driver, from Ioana Ciornei.
2) Fix 64-bit division in iwlwifi, from Arnd Bergmann.
3) Fix documentation for some eBPF helpers, from Quentin Monnet.
4) Some UAPI bpf header sync with tools, also from Quentin Monnet.
5) Set descriptor ownership bit at the right time for jumbo frames in
stmmac driver, from Aaro Koskinen.
6) Set IFF_UP properly in tun driver, from Eric Dumazet.
7) Fix load/store doubleword instruction generation in powerpc eBPF
JIT, from Naveen N. Rao.
8) nla_nest_start() return value checks all over, from Kangjie Lu.
9) Fix asoc_id handling in SCTP after the SCTP_*_ASSOC changes this
merge window. From Marcelo Ricardo Leitner and Xin Long.
10) Fix memory corruption with large MTUs in stmmac, from Aaro
Koskinen.
11) Do not use ipv4 header for ipv6 flows in TCP and DCCP, from Eric
Dumazet.
12) Fix topology subscription cancellation in tipc, from Erik Hugne.
13) Memory leak in genetlink error path, from Yue Haibing.
14) Valid control actions properly in packet scheduler, from Davide
Caratti.
15) Even if we get EEXIST, we still need to rehash if a shrink was
delayed. From Herbert Xu.
16) Fix interrupt mask handling in interrupt handler of r8169, from
Heiner Kallweit.
17) Fix leak in ehea driver, from Wen Yang"
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (168 commits)
dpaa2-eth: fix race condition with bql frame accounting
chelsio: use BUG() instead of BUG_ON(1)
net: devlink: skip info_get op call if it is not defined in dumpit
net: phy: bcm54xx: Encode link speed and activity into LEDs
tipc: change to check tipc_own_id to return in tipc_net_stop
net: usb: aqc111: Extend HWID table by QNAP device
net: sched: Kconfig: update reference link for PIE
net: dsa: qca8k: extend slave-bus implementations
net: dsa: qca8k: remove leftover phy accessors
dt-bindings: net: dsa: qca8k: support internal mdio-bus
dt-bindings: net: dsa: qca8k: fix example
net: phy: don't clear BMCR in genphy_soft_reset
bpf, libbpf: clarify bump in libbpf version info
bpf, libbpf: fix version info and add it to shared object
rxrpc: avoid clang -Wuninitialized warning
tipc: tipc clang warning
net: sched: fix cleanup NULL pointer exception in act_mirr
r8169: fix cable re-plugging issue
net: ethernet: ti: fix possible object reference leak
net: ibm: fix possible object reference leak
...
|
||
Gautham R. Shenoy
|
ce9afe08e7 |
powerpc/pseries/energy: Use OF accessor functions to read ibm,drc-indexes
In cpu_to_drc_index() in the case when FW_FEATURE_DRC_INFO is absent,
we currently use of_read_property() to obtain the pointer to the array
corresponding to the property "ibm,drc-indexes". The elements of this
array are of type __be32, but are accessed without any conversion to
the OS-endianness, which is buggy on a Little Endian OS.
Fix this by using of_property_read_u32_index() accessor function to
safely read the elements of the array.
Fixes:
|
||
|
Michael Ellerman
|
d947075739 |
powerpc/64: Fix memcmp reading past the end of src/dest
Chandan reported that fstests' generic/026 test hit a crash:
BUG: Unable to handle kernel data access at 0xc00000062ac40000
Faulting instruction address: 0xc000000000092240
Oops: Kernel access of bad area, sig: 11 [#1]
LE SMP NR_CPUS=2048 DEBUG_PAGEALLOC NUMA pSeries
CPU: 0 PID: 27828 Comm: chacl Not tainted 5.0.0-rc2-next-20190115-00001-g6de6dba64dda #1
NIP: c000000000092240 LR: c00000000066a55c CTR: 0000000000000000
REGS: c00000062c0c3430 TRAP: 0300 Not tainted (5.0.0-rc2-next-20190115-00001-g6de6dba64dda)
MSR: 8000000002009033 <SF,VEC,EE,ME,IR,DR,RI,LE> CR: 44000842 XER: 20000000
CFAR: 00007fff7f3108ac DAR: c00000062ac40000 DSISR: 40000000 IRQMASK: 0
GPR00: 0000000000000000 c00000062c0c36c0 c0000000017f4c00 c00000000121a660
GPR04: c00000062ac3fff9 0000000000000004 0000000000000020 00000000275b19c4
GPR08: 000000000000000c 46494c4500000000 5347495f41434c5f c0000000026073a0
GPR12: 0000000000000000 c0000000027a0000 0000000000000000 0000000000000000
GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
GPR20: c00000062ea70020 c00000062c0c38d0 0000000000000002 0000000000000002
GPR24: c00000062ac3ffe8 00000000275b19c4 0000000000000001 c00000062ac30000
GPR28: c00000062c0c38d0 c00000062ac30050 c00000062ac30058 0000000000000000
NIP memcmp+0x120/0x690
LR xfs_attr3_leaf_lookup_int+0x53c/0x5b0
Call Trace:
xfs_attr3_leaf_lookup_int+0x78/0x5b0 (unreliable)
xfs_da3_node_lookup_int+0x32c/0x5a0
xfs_attr_node_addname+0x170/0x6b0
xfs_attr_set+0x2ac/0x340
__xfs_set_acl+0xf0/0x230
xfs_set_acl+0xd0/0x160
set_posix_acl+0xc0/0x130
posix_acl_xattr_set+0x68/0x110
__vfs_setxattr+0xa4/0x110
__vfs_setxattr_noperm+0xac/0x240
vfs_setxattr+0x128/0x130
setxattr+0x248/0x600
path_setxattr+0x108/0x120
sys_setxattr+0x28/0x40
system_call+0x5c/0x70
Instruction dump:
7d201c28 7d402428 7c295040 38630008 38840008 408201f0 4200ffe8 2c050000
4182ff6c 20c50008 54c61838 7d201c28 <7d402428> 7d293436 7d4a3436 7c295040
The instruction dump decodes as:
subfic r6,r5,8
rlwinm r6,r6,3,0,28
ldbrx r9,0,r3
ldbrx r10,0,r4 <-
Which shows us doing an 8 byte load from c00000062ac3fff9, which
crosses the page boundary at c00000062ac40000 and faults.
It's not OK for memcmp to read past the end of the source or
destination buffers if that would cross a page boundary, because we
don't know that the next page is mapped.
As pointed out by Segher, we can read past the end of the source or
destination as long as we don't cross a 4K boundary, because that's
our minimum page size on all platforms.
The bug is in the code at the .Lcmp_rest_lt8bytes label. When we get
there we know that s1 is 8-byte aligned and we have at least 1 byte to
read, so a single 8-byte load won't read past the end of s1 and cross
a page boundary.
But we have to be more careful with s2. So check if it's within 8
bytes of a 4K boundary and if so go to the byte-by-byte loop.
Fixes:
|
||
|
Michael Ellerman
|
92edf8df0f |
powerpc/security: Fix spectre_v2 reporting
When I updated the spectre_v2 reporting to handle software count cache
flush I got the logic wrong when there's no software count cache
enabled at all.
The result is that on systems with the software count cache flush
disabled we print:
Mitigation: Indirect branch cache disabled, Software count cache flush
Which correctly indicates that the count cache is disabled, but
incorrectly says the software count cache flush is enabled.
The root of the problem is that we are trying to handle all
combinations of options. But we know now that we only expect to see
the software count cache flush enabled if the other options are false.
So split the two cases, which simplifies the logic and fixes the bug.
We were also missing a space before "(hardware accelerated)".
The result is we see one of:
Mitigation: Indirect branch serialisation (kernel only)
Mitigation: Indirect branch cache disabled
Mitigation: Software count cache flush
Mitigation: Software count cache flush (hardware accelerated)
Fixes:
|
||
Ben Hutchings
|
8bc0868998 |
powerpc/mm: Only define MAX_PHYSMEM_BITS in SPARSEMEM configurations
MAX_PHYSMEM_BITS only needs to be defined if CONFIG_SPARSEMEM is enabled, and that was the case before commit |
||
|
Christophe Leroy
|
4622a2d431 |
powerpc/6xx: fix setup and use of SPRN_SPRG_PGDIR for hash32
Not only the 603 but all 6xx need SPRN_SPRG_PGDIR to be initialised at
startup. This patch move it from __setup_cpu_603() to start_here()
and __secondary_start(), close to the initialisation of SPRN_THREAD.
Previously, virt addr of PGDIR was retrieved from thread struct.
Now that it is the phys addr which is stored in SPRN_SPRG_PGDIR,
hash_page() shall not convert it to phys anymore.
This patch removes the conversion.
Fixes:
|
||
|
Michael Ellerman
|
b5b4453e79 |
powerpc/vdso64: Fix CLOCK_MONOTONIC inconsistencies across Y2038
Jakub Drnec reported:
Setting the realtime clock can sometimes make the monotonic clock go
back by over a hundred years. Decreasing the realtime clock across
the y2k38 threshold is one reliable way to reproduce. Allegedly this
can also happen just by running ntpd, I have not managed to
reproduce that other than booting with rtc at >2038 and then running
ntp. When this happens, anything with timers (e.g. openjdk) breaks
rather badly.
And included a test case (slightly edited for brevity):
#define _POSIX_C_SOURCE 199309L
#include <stdio.h>
#include <time.h>
#include <stdlib.h>
#include <unistd.h>
long get_time(void) {
struct timespec tp;
clock_gettime(CLOCK_MONOTONIC, &tp);
return tp.tv_sec + tp.tv_nsec / 1000000000;
}
int main(void) {
long last = get_time();
while(1) {
long now = get_time();
if (now < last) {
printf("clock went backwards by %ld seconds!\n", last - now);
}
last = now;
sleep(1);
}
return 0;
}
Which when run concurrently with:
# date -s 2040-1-1
# date -s 2037-1-1
Will detect the clock going backward.
The root cause is that wtom_clock_sec in struct vdso_data is only a
32-bit signed value, even though we set its value to be equal to
tk->wall_to_monotonic.tv_sec which is 64-bits.
Because the monotonic clock starts at zero when the system boots the
wall_to_montonic.tv_sec offset is negative for current and future
dates. Currently on a freshly booted system the offset will be in the
vicinity of negative 1.5 billion seconds.
However if the wall clock is set past the Y2038 boundary, the offset
from wall to monotonic becomes less than negative 2^31, and no longer
fits in 32-bits. When that value is assigned to wtom_clock_sec it is
truncated and becomes positive, causing the VDSO assembly code to
calculate CLOCK_MONOTONIC incorrectly.
That causes CLOCK_MONOTONIC to jump ahead by ~4 billion seconds which
it is not meant to do. Worse, if the time is then set back before the
Y2038 boundary CLOCK_MONOTONIC will jump backward.
We can fix it simply by storing the full 64-bit offset in the
vdso_data, and using that in the VDSO assembly code. We also shuffle
some of the fields in vdso_data to avoid creating a hole.
The original commit that added the CLOCK_MONOTONIC support to the VDSO
did actually use a 64-bit value for wtom_clock_sec, see commit
|
||
|
Linus Torvalds
|
28d747f266 |
Kbuild updates for v5.1 (2nd)
- add more Build-Depends to Debian source package
- prefix header search paths with $(srctree)/
- make modpost show verbose section mismatch warnings
- avoid hard-coded CROSS_COMPILE for h8300
- fix regression for Debian make-kpkg command
- add semantic patch to detect missing put_device()
- fix some warnings of 'make deb-pkg'
- optimize NOSTDINC_FLAGS evaluation
- add warnings about redundant generic-y
- clean up Makefiles and scripts
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Merge tag 'kbuild-v5.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull more Kbuild updates from Masahiro Yamada:
- add more Build-Depends to Debian source package
- prefix header search paths with $(srctree)/
- make modpost show verbose section mismatch warnings
- avoid hard-coded CROSS_COMPILE for h8300
- fix regression for Debian make-kpkg command
- add semantic patch to detect missing put_device()
- fix some warnings of 'make deb-pkg'
- optimize NOSTDINC_FLAGS evaluation
- add warnings about redundant generic-y
- clean up Makefiles and scripts
* tag 'kbuild-v5.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
kconfig: remove stale lxdialog/.gitignore
kbuild: force all architectures except um to include mandatory-y
kbuild: warn redundant generic-y
Revert "modsign: Abort modules_install when signing fails"
kbuild: Make NOSTDINC_FLAGS a simply expanded variable
kbuild: deb-pkg: avoid implicit effects
coccinelle: semantic code search for missing put_device()
kbuild: pkg: grep include/config/auto.conf instead of $KCONFIG_CONFIG
kbuild: deb-pkg: introduce is_enabled and if_enabled_echo to builddeb
kbuild: deb-pkg: add CONFIG_ prefix to kernel config options
kbuild: add workaround for Debian make-kpkg
kbuild: source include/config/auto.conf instead of ${KCONFIG_CONFIG}
unicore32: simplify linker script generation for decompressor
h8300: use cc-cross-prefix instead of hardcoding h8300-unknown-linux-
kbuild: move archive command to scripts/Makefile.lib
modpost: always show verbose warning for section mismatch
ia64: prefix header search path with $(srctree)/
libfdt: prefix header search paths with $(srctree)/
deb-pkg: generate correct build dependencies
|
||
Masahiro Yamada
|
037fc3368b |
kbuild: force all architectures except um to include mandatory-y
Currently, every arch/*/include/uapi/asm/Kbuild explicitly includes the common Kbuild.asm file. Factor out the duplicated include directives to scripts/Makefile.asm-generic so that no architecture would opt out of the mandatory-y mechanism. um is not forced to include mandatory-y since it is a very exceptional case which does not support UAPI. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> |
||
|
Masahiro Yamada
|
7cbbbb8bc2 |
kbuild: warn redundant generic-y
The generic-y is redundant under the following condition: - arch has its own implementation - the same header is added to generated-y - the same header is added to mandatory-y If a redundant generic-y is found, the warning like follows is displayed: scripts/Makefile.asm-generic:20: redundant generic-y found in arch/arm/include/asm/Kbuild: timex.h I fixed up arch Kbuild files found by this. Suggested-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> |
||
|
Linus Torvalds
|
f67e3fb489 |
device-dax for 5.1
* Replace the /sys/class/dax device model with /sys/bus/dax, and include
a compat driver so distributions can opt-in to the new ABI.
* Allow for an alternative driver for the device-dax address-range
* Introduce the 'kmem' driver to hotplug / assign a device-dax
address-range to the core-mm.
* Arrange for the device-dax target-node to be onlined so that the newly
added memory range can be uniquely referenced by numa apis.
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Merge tag 'devdax-for-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull device-dax updates from Dan Williams:
"New device-dax infrastructure to allow persistent memory and other
"reserved" / performance differentiated memories, to be assigned to
the core-mm as "System RAM".
Some users want to use persistent memory as additional volatile
memory. They are willing to cope with potential performance
differences, for example between DRAM and 3D Xpoint, and want to use
typical Linux memory management apis rather than a userspace memory
allocator layered over an mmap() of a dax file. The administration
model is to decide how much Persistent Memory (pmem) to use as System
RAM, create a device-dax-mode namespace of that size, and then assign
it to the core-mm. The rationale for device-dax is that it is a
generic memory-mapping driver that can be layered over any "special
purpose" memory, not just pmem. On subsequent boots udev rules can be
used to restore the memory assignment.
One implication of using pmem as RAM is that mlock() no longer keeps
data off persistent media. For this reason it is recommended to enable
NVDIMM Security (previously merged for 5.0) to encrypt pmem contents
at rest. We considered making this recommendation an actively enforced
requirement, but in the end decided to leave it as a distribution /
administrator policy to allow for emulation and test environments that
lack security capable NVDIMMs.
Summary:
- Replace the /sys/class/dax device model with /sys/bus/dax, and
include a compat driver so distributions can opt-in to the new ABI.
- Allow for an alternative driver for the device-dax address-range
- Introduce the 'kmem' driver to hotplug / assign a device-dax
address-range to the core-mm.
- Arrange for the device-dax target-node to be onlined so that the
newly added memory range can be uniquely referenced by numa apis"
NOTE! I'm not entirely happy with the whole "PMEM as RAM" model because
we currently have special - and very annoying rules in the kernel about
accessing PMEM only with the "MC safe" accessors, because machine checks
inside the regular repeat string copy functions can be fatal in some
(not described) circumstances.
And apparently the PMEM modules can cause that a lot more than regular
RAM. The argument is that this happens because PMEM doesn't necessarily
get scrubbed at boot like RAM does, but that is planned to be added for
the user space tooling.
Quoting Dan from another email:
"The exposure can be reduced in the volatile-RAM case by scanning for
and clearing errors before it is onlined as RAM. The userspace tooling
for that can be in place before v5.1-final. There's also runtime
notifications of errors via acpi_nfit_uc_error_notify() from
background scrubbers on the DIMM devices. With that mechanism the
kernel could proactively clear newly discovered poison in the volatile
case, but that would be additional development more suitable for v5.2.
I understand the concern, and the need to highlight this issue by
tapping the brakes on feature development, but I don't see PMEM as RAM
making the situation worse when the exposure is also there via DAX in
the PMEM case. Volatile-RAM is arguably a safer use case since it's
possible to repair pages where the persistent case needs active
application coordination"
* tag 'devdax-for-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
device-dax: "Hotplug" persistent memory for use like normal RAM
mm/resource: Let walk_system_ram_range() search child resources
mm/memory-hotplug: Allow memory resources to be children
mm/resource: Move HMM pr_debug() deeper into resource code
mm/resource: Return real error codes from walk failures
device-dax: Add a 'modalias' attribute to DAX 'bus' devices
device-dax: Add a 'target_node' attribute
device-dax: Auto-bind device after successful new_id
acpi/nfit, device-dax: Identify differentiated memory with a unique numa-node
device-dax: Add /sys/class/dax backwards compatibility
device-dax: Add support for a dax override driver
device-dax: Move resource pinning+mapping into the common driver
device-dax: Introduce bus + driver model
device-dax: Start defining a dax bus model
device-dax: Remove multi-resource infrastructure
device-dax: Kill dax_region base
device-dax: Kill dax_region ida
|
||
David S. Miller
|
0aedadcf6b |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf
Daniel Borkmann says: ==================== pull-request: bpf 2019-03-16 The following pull-request contains BPF updates for your *net* tree. The main changes are: 1) Fix a umem memory leak on cleanup in AF_XDP, from Björn. 2) Fix BTF to properly resolve forward-declared enums into their corresponding full enum definition types during deduplication, from Andrii. 3) Fix libbpf to reject invalid flags in xsk_socket__create(), from Magnus. 4) Fix accessing invalid pointer returned from bpf_tcp_sock() and bpf_sk_fullsock() after bpf_sk_release() was called, from Martin. 5) Fix generation of load/store DW instructions in PPC JIT, from Naveen. 6) Various fixes in BPF helper function documentation in bpf.h UAPI header used to bpf-helpers(7) man page, from Quentin. 7) Fix segfault in BPF test_progs when prog loading failed, from Yonghong. ==================== Signed-off-by: David S. Miller <davem@davemloft.net> |
||
|
Linus Torvalds
|
a9c55d58bc |
powerpc fixes for 5.1 #2
One fix to prevent runtime allocation of 16GB pages when running in a VM (as opposed to bare metal), because it doesn't work. A small fix to our recently added KCOV support to exempt some more code from being instrumented. Plus a few minor build fixes, a small dead code removal and a defconfig update. Thanks to: Alexey Kardashevskiy, Aneesh Kumar K.V, Christophe Leroy, Jason Yan, Joel Stanley, Mahesh Salgaonkar, Mathieu Malaterre. -----BEGIN PGP SIGNATURE----- iQIcBAABAgAGBQJcjNHCAAoJEFHr6jzI4aWAJVAP/21RUgDvqAAW55jTwihH6Eit q6l1mJ30zwARz+UYWssqMe7qIYmnjWDeapgpZncZE3P6f3VMmepJrr75zca0LJhC ixWqNJOcQgUu9civDwwpaqKQvyY0CYCdF5mu1rA1RNZ2kTeuCMw7zYPPpM84UGkq IPFe3EgWAOURFeaQUGpH16klJVbPISq/1RCtsAkR4QifD4auM+EDYq+ML69LInc4 m7mi2CpPQDGZyCepFL0zdfOI43zrtWerG0UwCxPbGPYzvT+T3mvxU2unV1NcYn6/ obNYB5V0OCz4gUiu7aLoHnYZx2zK8fi1lTjSrB7XhWdi4ftEfRP3TrUntHWo420n FC3+ibbjS3Cr8y7eubXgEAAKh74M1xzBF2bdAEHQ/QmqHZLcG+mnUihOq/g8mCp1 LsTKvkzXilov752wKSwdjvSNbU29a2KRaXSXAEgWJvsAQbZAidGRzX7CA9XeHQPp kRCWHTwzXM0E31oi5rGAk2F1l4EK12QLdk1m0DF96ZanX7xG/UK6MpDNut2y51Wr KsWPYhUhI6pc9xt+Fts0zehDWAtfttn7RTvE+34dkaZURGl3rQkjsKt1lQ+scRYX fuSAnpTinE46e6APezwjCELtHDAzOCZvOnh9RVPe+F//KEF8LcNQv6TLhQoukRAe ldJEhSReJfo3/agqGJ6v =6cp4 -----END PGP SIGNATURE----- Merge tag 'powerpc-5.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc fixes from Michael Ellerman: "One fix to prevent runtime allocation of 16GB pages when running in a VM (as opposed to bare metal), because it doesn't work. A small fix to our recently added KCOV support to exempt some more code from being instrumented. Plus a few minor build fixes, a small dead code removal and a defconfig update. Thanks to: Alexey Kardashevskiy, Aneesh Kumar K.V, Christophe Leroy, Jason Yan, Joel Stanley, Mahesh Salgaonkar, Mathieu Malaterre" * tag 'powerpc-5.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc/64s: Include <asm/nmi.h> header file to fix a warning powerpc/powernv: Fix compile without CONFIG_TRACEPOINTS powerpc/mm: Disable kcov for SLB routines powerpc: remove dead code in head_fsl_booke.S powerpc/configs: Sync skiroot defconfig powerpc/hugetlb: Don't do runtime allocation of 16G pages in LPAR configuration |
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Naveen N. Rao
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86be36f650 |
powerpc: bpf: Fix generation of load/store DW instructions
Yauheni Kaliuta pointed out that PTR_TO_STACK store/load verifier test
was failing on powerpc64 BE, and rightfully indicated that the PPC_LD()
macro is not masking away the last two bits of the offset per the ISA,
resulting in the generation of 'lwa' instruction instead of the intended
'ld' instruction.
Segher also pointed out that we can't simply mask away the last two bits
as that will result in loading/storing from/to a memory location that
was not intended.
This patch addresses this by using ldx/stdx if the offset is not
word-aligned. We load the offset into a temporary register (TMP_REG_2)
and use that as the index register in a subsequent ldx/stdx. We fix
PPC_LD() macro to mask off the last two bits, but enhance PPC_BPF_LL()
and PPC_BPF_STL() to factor in the offset value and generate the proper
instruction sequence. We also convert all existing users of PPC_LD() and
PPC_STD() to use these macros. All existing uses of these macros have
been audited to ensure that TMP_REG_2 can be clobbered.
Fixes:
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Linus Torvalds
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636deed6c0 |
ARM: some cleanups, direct physical timer assignment, cache sanitization
for 32-bit guests
s390: interrupt cleanup, introduction of the Guest Information Block,
preparation for processor subfunctions in cpu models
PPC: bug fixes and improvements, especially related to machine checks
and protection keys
x86: many, many cleanups, including removing a bunch of MMU code for
unnecessary optimizations; plus AVIC fixes.
Generic: memcg accounting
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM updates from Paolo Bonzini:
"ARM:
- some cleanups
- direct physical timer assignment
- cache sanitization for 32-bit guests
s390:
- interrupt cleanup
- introduction of the Guest Information Block
- preparation for processor subfunctions in cpu models
PPC:
- bug fixes and improvements, especially related to machine checks
and protection keys
x86:
- many, many cleanups, including removing a bunch of MMU code for
unnecessary optimizations
- AVIC fixes
Generic:
- memcg accounting"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (147 commits)
kvm: vmx: fix formatting of a comment
KVM: doc: Document the life cycle of a VM and its resources
MAINTAINERS: Add KVM selftests to existing KVM entry
Revert "KVM/MMU: Flush tlb directly in the kvm_zap_gfn_range()"
KVM: PPC: Book3S: Add count cache flush parameters to kvmppc_get_cpu_char()
KVM: PPC: Fix compilation when KVM is not enabled
KVM: Minor cleanups for kvm_main.c
KVM: s390: add debug logging for cpu model subfunctions
KVM: s390: implement subfunction processor calls
arm64: KVM: Fix architecturally invalid reset value for FPEXC32_EL2
KVM: arm/arm64: Remove unused timer variable
KVM: PPC: Book3S: Improve KVM reference counting
KVM: PPC: Book3S HV: Fix build failure without IOMMU support
Revert "KVM: Eliminate extra function calls in kvm_get_dirty_log_protect()"
x86: kvmguest: use TSC clocksource if invariant TSC is exposed
KVM: Never start grow vCPU halt_poll_ns from value below halt_poll_ns_grow_start
KVM: Expose the initial start value in grow_halt_poll_ns() as a module parameter
KVM: grow_halt_poll_ns() should never shrink vCPU halt_poll_ns
KVM: x86/mmu: Consolidate kvm_mmu_zap_all() and kvm_mmu_zap_mmio_sptes()
KVM: x86/mmu: WARN if zapping a MMIO spte results in zapping children
...
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Mathieu Malaterre
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de3c83c2fd |
powerpc/64s: Include <asm/nmi.h> header file to fix a warning
Make sure to include <asm/nmi.h> to provide the following prototype:
hv_nmi_check_nonrecoverable.
Remove the following warning treated as error (W=1):
arch/powerpc/kernel/traps.c:393:6: error: no previous prototype for 'hv_nmi_check_nonrecoverable'
Fixes:
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Alexey Kardashevskiy
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1702877621 |
powerpc/powernv: Fix compile without CONFIG_TRACEPOINTS
The functions returns s64 but the return statement is missing.
This adds the missing return statement.
Fixes:
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Mike Rapoport
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8a7f97b902 |
treewide: add checks for the return value of memblock_alloc*()
Add check for the return value of memblock_alloc*() functions and call
panic() in case of error. The panic message repeats the one used by
panicing memblock allocators with adjustment of parameters to include
only relevant ones.
The replacement was mostly automated with semantic patches like the one
below with manual massaging of format strings.
@@
expression ptr, size, align;
@@
ptr = memblock_alloc(size, align);
+ if (!ptr)
+ panic("%s: Failed to allocate %lu bytes align=0x%lx\n", __func__, size, align);
[anders.roxell@linaro.org: use '%pa' with 'phys_addr_t' type]
Link: http://lkml.kernel.org/r/20190131161046.21886-1-anders.roxell@linaro.org
[rppt@linux.ibm.com: fix format strings for panics after memblock_alloc]
Link: http://lkml.kernel.org/r/1548950940-15145-1-git-send-email-rppt@linux.ibm.com
[rppt@linux.ibm.com: don't panic if the allocation in sparse_buffer_init fails]
Link: http://lkml.kernel.org/r/20190131074018.GD28876@rapoport-lnx
[akpm@linux-foundation.org: fix xtensa printk warning]
Link: http://lkml.kernel.org/r/1548057848-15136-20-git-send-email-rppt@linux.ibm.com
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
Reviewed-by: Guo Ren <ren_guo@c-sky.com> [c-sky]
Acked-by: Paul Burton <paul.burton@mips.com> [MIPS]
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> [s390]
Reviewed-by: Juergen Gross <jgross@suse.com> [Xen]
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org> [m68k]
Acked-by: Max Filippov <jcmvbkbc@gmail.com> [xtensa]
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christophe Leroy <christophe.leroy@c-s.fr>
Cc: Christoph Hellwig <hch@lst.de>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Dennis Zhou <dennis@kernel.org>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: Guo Ren <guoren@kernel.org>
Cc: Mark Salter <msalter@redhat.com>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Rich Felker <dalias@libc.org>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Rob Herring <robh@kernel.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Mike Rapoport
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0ba9e6edd4 |
memblock: drop memblock_alloc_base()
The memblock_alloc_base() function tries to allocate a memory up to the limit specified by its max_addr parameter and panics if the allocation fails. Replace its usage with memblock_phys_alloc_range() and make the callers check the return value and panic in case of error. Link: http://lkml.kernel.org/r/1548057848-15136-10-git-send-email-rppt@linux.ibm.com Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Acked-by: Michael Ellerman <mpe@ellerman.id.au> [powerpc] Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Christophe Leroy <christophe.leroy@c-s.fr> Cc: Christoph Hellwig <hch@lst.de> Cc: "David S. Miller" <davem@davemloft.net> Cc: Dennis Zhou <dennis@kernel.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Greentime Hu <green.hu@gmail.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Guan Xuetao <gxt@pku.edu.cn> Cc: Guo Ren <guoren@kernel.org> Cc: Guo Ren <ren_guo@c-sky.com> [c-sky] Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Juergen Gross <jgross@suse.com> [Xen] Cc: Mark Salter <msalter@redhat.com> Cc: Matt Turner <mattst88@gmail.com> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Simek <monstr@monstr.eu> Cc: Paul Burton <paul.burton@mips.com> Cc: Petr Mladek <pmladek@suse.com> Cc: Richard Weinberger <richard@nod.at> Cc: Rich Felker <dalias@libc.org> Cc: Rob Herring <robh+dt@kernel.org> Cc: Rob Herring <robh@kernel.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Stafford Horne <shorne@gmail.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Mike Rapoport
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ecc3e771f4 |
memblock: memblock_phys_alloc(): don't panic
Make the memblock_phys_alloc() function an inline wrapper for memblock_phys_alloc_range() and update the memblock_phys_alloc() callers to check the returned value and panic in case of error. Link: http://lkml.kernel.org/r/1548057848-15136-8-git-send-email-rppt@linux.ibm.com Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Christophe Leroy <christophe.leroy@c-s.fr> Cc: Christoph Hellwig <hch@lst.de> Cc: "David S. Miller" <davem@davemloft.net> Cc: Dennis Zhou <dennis@kernel.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Greentime Hu <green.hu@gmail.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Guan Xuetao <gxt@pku.edu.cn> Cc: Guo Ren <guoren@kernel.org> Cc: Guo Ren <ren_guo@c-sky.com> [c-sky] Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Juergen Gross <jgross@suse.com> [Xen] Cc: Mark Salter <msalter@redhat.com> Cc: Matt Turner <mattst88@gmail.com> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Simek <monstr@monstr.eu> Cc: Paul Burton <paul.burton@mips.com> Cc: Petr Mladek <pmladek@suse.com> Cc: Richard Weinberger <richard@nod.at> Cc: Rich Felker <dalias@libc.org> Cc: Rob Herring <robh+dt@kernel.org> Cc: Rob Herring <robh@kernel.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Stafford Horne <shorne@gmail.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Mike Rapoport
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337555744e |
memblock: memblock_phys_alloc_try_nid(): don't panic
The memblock_phys_alloc_try_nid() function tries to allocate memory from the requested node and then falls back to allocation from any node in the system. The memblock_alloc_base() fallback used by this function panics if the allocation fails. Replace the memblock_alloc_base() fallback with the direct call to memblock_alloc_range_nid() and update the memblock_phys_alloc_try_nid() callers to check the returned value and panic in case of error. Link: http://lkml.kernel.org/r/1548057848-15136-7-git-send-email-rppt@linux.ibm.com Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Acked-by: Michael Ellerman <mpe@ellerman.id.au> [powerpc] Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Christophe Leroy <christophe.leroy@c-s.fr> Cc: Christoph Hellwig <hch@lst.de> Cc: "David S. Miller" <davem@davemloft.net> Cc: Dennis Zhou <dennis@kernel.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Greentime Hu <green.hu@gmail.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Guan Xuetao <gxt@pku.edu.cn> Cc: Guo Ren <guoren@kernel.org> Cc: Guo Ren <ren_guo@c-sky.com> [c-sky] Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Juergen Gross <jgross@suse.com> [Xen] Cc: Mark Salter <msalter@redhat.com> Cc: Matt Turner <mattst88@gmail.com> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Paul Burton <paul.burton@mips.com> Cc: Petr Mladek <pmladek@suse.com> Cc: Richard Weinberger <richard@nod.at> Cc: Rich Felker <dalias@libc.org> Cc: Rob Herring <robh+dt@kernel.org> Cc: Rob Herring <robh@kernel.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Stafford Horne <shorne@gmail.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |