Add ALTERNATIVE_TERNARY support for replacing an initial instruction
with either of two instructions depending on a feature:
ALTERNATIVE_TERNARY "default_instr", FEATURE_NR,
"feature_on_instr", "feature_off_instr"
which will start with "default_instr" and at patch time will,
depending on FEATURE_NR being set or not, patch that with either
"feature_on_instr" or "feature_off_instr".
[ bp: Add comment ontop. ]
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20210311142319.4723-7-jgross@suse.com
Add support for alternative patching for the case a feature is not
present on the current CPU. For users of ALTERNATIVE() and friends, an
inverted feature is specified by applying the ALT_NOT() macro to it,
e.g.:
ALTERNATIVE(old, new, ALT_NOT(feature));
Committer note:
The decision to encode the NOT-bit in the feature bit itself is because
a future change which would make objtool generate such alternative
calls, would keep the code in objtool itself fairly simple.
Also, this allows for the alternative macros to support the NOT feature
without having to change them.
Finally, the u16 cpuid member encoding the X86_FEATURE_ flags is not an
ABI so if more bits are needed, cpuid itself can be enlarged or a flags
field can be added to struct alt_instr after having considered the size
growth in either cases.
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20210311142319.4723-6-jgross@suse.com
The time pvops functions are the only ones left which might be
used in 32-bit mode and which return a 64-bit value.
Switch them to use the static_call() mechanism instead of pvops, as
this allows quite some simplification of the pvops implementation.
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20210311142319.4723-5-jgross@suse.com
Merge arch/x86/include/asm/alternative-asm.h into
arch/x86/include/asm/alternative.h in order to make it easier to use
common definitions later.
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20210311142319.4723-2-jgross@suse.com
The macro ALTINSTR_REPLACEMENT() doesn't make use of the feature
parameter, so drop it.
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20210309134813.23912-4-jgross@suse.com
* selftests fixes
* Add runstate information to the new Xen support
* Allow compiling out the Xen interface
* 32-bit PAE without EPT bugfix
* NULL pointer dereference bugfix
-----BEGIN PGP SIGNATURE-----
iQFIBAABCAAyFiEE8TM4V0tmI4mGbHaCv/vSX3jHroMFAmA+lGcUHHBib256aW5p
QHJlZGhhdC5jb20ACgkQv/vSX3jHroMaMQf/Q8bQr5vVAeNk+1MyRmzNqFEbLqbe
h50f4Wd2N+svZ6XinQH1vvuQm1WYj/g616Q3nCeYwCJyY34g5tf60XcuAMnVRIzw
qc2IUvSAJ3faVElMrSA5thN3bkPzJpRrdIpQGBgOd+rT+eQkPSsJlTy34JJmvbmh
xFGjoVj49tYEkFfpxEbtytW6QiYtPz/ai8SARRXbEUWO/pVzdkgK5XWshRhE9vpB
GLCEXUngdPokJMblRMuK4YOSFQXXHobAJAgPwSzguDV41qezXaKOGYOLe7+V+0kH
z607RnQc1wGgsLanT13okYMQr09/XCjpvFkZ9CK2bIJPsyWP+ihA/37hVQ==
=1GNo
-----END PGP SIGNATURE-----
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM fixes from Paolo Bonzini:
- Doc fixes
- selftests fixes
- Add runstate information to the new Xen support
- Allow compiling out the Xen interface
- 32-bit PAE without EPT bugfix
- NULL pointer dereference bugfix
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: SVM: Clear the CR4 register on reset
KVM: x86/xen: Add support for vCPU runstate information
KVM: x86/xen: Fix return code when clearing vcpu_info and vcpu_time_info
selftests: kvm: Mmap the entire vcpu mmap area
KVM: Documentation: Fix index for KVM_CAP_PPC_DAWR1
KVM: x86: allow compiling out the Xen hypercall interface
KVM: xen: flush deferred static key before checking it
KVM: x86/mmu: Set SPTE_AD_WRPROT_ONLY_MASK if and only if PML is enabled
KVM: x86: hyper-v: Fix Hyper-V context null-ptr-deref
KVM: x86: remove misplaced comment on active_mmu_pages
KVM: Documentation: rectify rst markup in kvm_run->flags
Documentation: kvm: fix messy conversion from .txt to .rst
-----BEGIN PGP SIGNATURE-----
iHUEABYIAB0WIQRTLbB6QfY48x44uB6AXGG7T9hjvgUCYEC9gwAKCRCAXGG7T9hj
vswYAP0V7gIfsbKMONeHJtmIJlVT0igtFMRMKrHL4TqEnv3mgQEAglhC+fNMmqdP
WJOMxMZvkfQYhNMaodwpTlFMhnFW8As=
=NiJF
-----END PGP SIGNATURE-----
Merge tag 'for-linus-5.12b-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen fixes from Juergen Gross:
"Two security issues (XSA-367 and XSA-369)"
* tag 'for-linus-5.12b-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
xen: fix p2m size in dom0 for disabled memory hotplug case
xen-netback: respect gnttab_map_refs()'s return value
Xen/gnttab: handle p2m update errors on a per-slot basis
Since commit 9e2369c06c ("xen: add helpers to allocate unpopulated
memory") foreign mappings are using guest physical addresses allocated
via ZONE_DEVICE functionality.
This will result in problems for the case of no balloon memory hotplug
being configured, as the p2m list will only cover the initial memory
size of the domain. Any ZONE_DEVICE allocated address will be outside
the p2m range and thus a mapping can't be established with that memory
address.
Fix that by extending the p2m size for that case. At the same time add
a check for a to be created mapping to be within the p2m limits in
order to detect errors early.
While changing a comment, remove some 32-bit leftovers.
This is XSA-369.
Fixes: 9e2369c06c ("xen: add helpers to allocate unpopulated memory")
Cc: <stable@vger.kernel.org> # 5.9
Reported-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
This is how Xen guests do steal time accounting. The hypervisor records
the amount of time spent in each of running/runnable/blocked/offline
states.
In the Xen accounting, a vCPU is still in state RUNSTATE_running while
in Xen for a hypercall or I/O trap, etc. Only if Xen explicitly schedules
does the state become RUNSTATE_blocked. In KVM this means that even when
the vCPU exits the kvm_run loop, the state remains RUNSTATE_running.
The VMM can explicitly set the vCPU to RUNSTATE_blocked by using the
KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_CURRENT attribute, and can also use
KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_ADJUST to retrospectively add a given
amount of time to the blocked state and subtract it from the running
state.
The state_entry_time corresponds to get_kvmclock_ns() at the time the
vCPU entered the current state, and the total times of all four states
should always add up to state_entry_time.
Co-developed-by: Joao Martins <joao.m.martins@oracle.com>
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Message-Id: <20210301125309.874953-2-dwmw2@infradead.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
- take into account HVA before retrying on MMU notifier race
- fixes for nested AMD guests without NPT
- allow INVPCID in guest without PCID
- disable PML in hardware when not in use
- MMU code cleanups
-----BEGIN PGP SIGNATURE-----
iQFIBAABCAAyFiEE8TM4V0tmI4mGbHaCv/vSX3jHroMFAmA3eMQUHHBib256aW5p
QHJlZGhhdC5jb20ACgkQv/vSX3jHroP6TQf5ARpUyq3oo+13albwg+zNca6hzR8i
Vl7dpoR3bSJCN3sTYFnlL9eXw5TxgeUL2nqKqma6ddZDNDEBLT2Bq8rcFkbi4pUf
n7av76EEq74HW/jlUhKVug7Q5Dm5DiKC6BOH3RVuKHbr6iZseyF3jXZSX0Ppf0yF
gvoy6cGyMW60NVLN5tuGeOjVQ1fxziE0SqB90fXuiWgZ5rzIBfbqJV7EOOZsGO67
/LHSaEpvKutsc2a+Hx76yQNJjAbb2/O+4Bo5/RqfdqS5tRLGBzYggdJjLvAPvd6P
pTNtDCnErvBZQfMedEQyHYuBL2Ca59fOp6i/ekOM2I+m7816+kSkdTMt2g==
=iMHY
-----END PGP SIGNATURE-----
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull more KVM updates from Paolo Bonzini:
"x86:
- take into account HVA before retrying on MMU notifier race
- fixes for nested AMD guests without NPT
- allow INVPCID in guest without PCID
- disable PML in hardware when not in use
- MMU code cleanups:
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (28 commits)
KVM: SVM: Fix nested VM-Exit on #GP interception handling
KVM: vmx/pmu: Fix dummy check if lbr_desc->event is created
KVM: x86/mmu: Consider the hva in mmu_notifier retry
KVM: x86/mmu: Skip mmu_notifier check when handling MMIO page fault
KVM: Documentation: rectify rst markup in KVM_GET_SUPPORTED_HV_CPUID
KVM: nSVM: prepare guest save area while is_guest_mode is true
KVM: x86/mmu: Remove a variety of unnecessary exports
KVM: x86: Fold "write-protect large" use case into generic write-protect
KVM: x86/mmu: Don't set dirty bits when disabling dirty logging w/ PML
KVM: VMX: Dynamically enable/disable PML based on memslot dirty logging
KVM: x86: Further clarify the logic and comments for toggling log dirty
KVM: x86: Move MMU's PML logic to common code
KVM: x86/mmu: Make dirty log size hook (PML) a value, not a function
KVM: x86/mmu: Expand on the comment in kvm_vcpu_ad_need_write_protect()
KVM: nVMX: Disable PML in hardware when running L2
KVM: x86/mmu: Consult max mapping level when zapping collapsible SPTEs
KVM: x86/mmu: Pass the memslot to the rmap callbacks
KVM: x86/mmu: Split out max mapping level calculation to helper
KVM: x86/mmu: Expand collapsible SPTE zap for TDP MMU to ZONE_DEVICE and HugeTLB pages
KVM: nVMX: no need to undo inject_page_fault change on nested vmexit
...
Instead of removing the fault handling portion of the stack trace based on
the fault handler's name, just use struct pt_regs directly.
Change kfence_handle_page_fault() to take a struct pt_regs, and plumb it
through to kfence_report_error() for out-of-bounds, use-after-free, or
invalid access errors, where pt_regs is used to generate the stack trace.
If the kernel is a DEBUG_KERNEL, also show registers for more information.
Link: https://lkml.kernel.org/r/20201105092133.2075331-1-elver@google.com
Signed-off-by: Marco Elver <elver@google.com>
Suggested-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Jann Horn <jannh@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Add architecture specific implementation details for KFENCE and enable
KFENCE for the x86 architecture. In particular, this implements the
required interface in <asm/kfence.h> for setting up the pool and
providing helper functions for protecting and unprotecting pages.
For x86, we need to ensure that the pool uses 4K pages, which is done
using the set_memory_4k() helper function.
[elver@google.com: add missing copyright and description header]
Link: https://lkml.kernel.org/r/20210118092159.145934-2-elver@google.com
Link: https://lkml.kernel.org/r/20201103175841.3495947-3-elver@google.com
Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Alexander Potapenko <glider@google.com>
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
Co-developed-by: Marco Elver <elver@google.com>
Reviewed-by: Jann Horn <jannh@google.com>
Cc: Andrey Konovalov <andreyknvl@google.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christopher Lameter <cl@linux.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Hillf Danton <hdanton@sina.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Joern Engel <joern@purestorage.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Paul E. McKenney <paulmck@kernel.org>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: SeongJae Park <sjpark@amazon.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The 'mmu_page_hash' is used as hash table while 'active_mmu_pages' is a
list. Remove the misplaced comment as it's mostly stating the obvious
anyways.
Signed-off-by: Dongli Zhang <dongli.zhang@oracle.com>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210226061945.1222-1-dongli.zhang@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The irq stack switching was moved out of the ASM entry code in course of
the entry code consolidation. It ended up being suboptimal in various
ways.
- Make the stack switching inline so the stackpointer manipulation is not
longer at an easy to find place.
- Get rid of the unnecessary indirect call.
- Avoid the double stack switching in interrupt return and reuse the
interrupt stack for softirq handling.
- A objtool fix for CONFIG_FRAME_POINTER=y builds where it got confused
about the stack pointer manipulation.
-----BEGIN PGP SIGNATURE-----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=Sqr1
-----END PGP SIGNATURE-----
Merge tag 'x86-entry-2021-02-24' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 irq entry updates from Thomas Gleixner:
"The irq stack switching was moved out of the ASM entry code in course
of the entry code consolidation. It ended up being suboptimal in
various ways.
This reworks the X86 irq stack handling:
- Make the stack switching inline so the stackpointer manipulation is
not longer at an easy to find place.
- Get rid of the unnecessary indirect call.
- Avoid the double stack switching in interrupt return and reuse the
interrupt stack for softirq handling.
- A objtool fix for CONFIG_FRAME_POINTER=y builds where it got
confused about the stack pointer manipulation"
* tag 'x86-entry-2021-02-24' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
objtool: Fix stack-swizzle for FRAME_POINTER=y
um: Enforce the usage of asm-generic/softirq_stack.h
x86/softirq/64: Inline do_softirq_own_stack()
softirq: Move do_softirq_own_stack() to generic asm header
softirq: Move __ARCH_HAS_DO_SOFTIRQ to Kconfig
x86: Select CONFIG_HAVE_IRQ_EXIT_ON_IRQ_STACK
x86/softirq: Remove indirection in do_softirq_own_stack()
x86/entry: Use run_sysvec_on_irqstack_cond() for XEN upcall
x86/entry: Convert device interrupts to inline stack switching
x86/entry: Convert system vectors to irq stack macro
x86/irq: Provide macro for inlining irq stack switching
x86/apic: Split out spurious handling code
x86/irq/64: Adjust the per CPU irq stack pointer by 8
x86/irq: Sanitize irq stack tracking
x86/entry: Fix instrumentation annotation
Drop support for depercated platforms using SFI, drop the entire
support for SFI that has been long deprecated too and make some
janitorial changes on top of that (Andy Shevchenko).
-----BEGIN PGP SIGNATURE-----
iQJGBAABCAAwFiEE4fcc61cGeeHD/fCwgsRv/nhiVHEFAmA2ZukSHHJqd0Byand5
c29ja2kubmV0AAoJEILEb/54YlRxKcAP/RAkbRVFndhQIZYTCu74O64v86FjTBcS
3vvcKevVkBJiPJL1l10Yo3UMEYAbJIRZY00jkUjX7pq4eurELu6LwdMtJlHwh0p5
ZP5QeSdq1xN+9UGwBGXlnka2ypmD8fjbQyxHKErYgvmOl4ltFm40PyUC9GCVFLnW
/1o83t/dcmTtaOGPYWTW3HuCsbYqANG/x8PYAFeAk5dBxoSaNV69gAEuCYr1JC5N
Nie4x2m2I5v9egJFhy6rmRrpHPBvocCho+FipJFagSKWHPCI2rBSKESVOj23zWt2
eIWhK5T/ZR3OqQb9tZN6uAPJmBAerc3l7ZHZ1oFBP68MjUJJJhduQ+hNxljOyLLw
CVx0UhuancIWZdyJon5f7E9S9STZLIZ/3usx3K+7AZK+PSmH8d/UEIeXfkC0FcAr
eO3gwalB9KuhhXbVvihW79RkfkV5pTaMvVS7l1BffN4WE1dB9PKtJ8/MKFbGaTUF
4Rev6BdAEDqJrw6OIARvNcI6TAEhbKe5yIghzhQWn+fZ7oEm6f6fvFObBzD0KvQP
4RwYJhXU0gtK5yo/Ib1sUqjVQn8Jgqb7Xq46WZsP07Yc6O2Ws/86qCpX1GSCv5FU
1CZEJLGLGTbjDYOyMaUDfO/tI5kXG11e0Ss7Q+snWH4Iyhg0aNEYChKjOAFIxIxg
JJYOH8O5p2IP
=jlPz
-----END PGP SIGNATURE-----
Merge tag 'sfi-removal-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull Simple Firmware Interface (SFI) support removal from Rafael Wysocki:
"Drop support for depercated platforms using SFI, drop the entire
support for SFI that has been long deprecated too and make some
janitorial changes on top of that (Andy Shevchenko)"
* tag 'sfi-removal-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
x86/platform/intel-mid: Update Copyright year and drop file names
x86/platform/intel-mid: Remove unused header inclusion in intel-mid.h
x86/platform/intel-mid: Drop unused __intel_mid_cpu_chip and Co.
x86/platform/intel-mid: Get rid of intel_scu_ipc_legacy.h
x86/PCI: Describe @reg for type1_access_ok()
x86/PCI: Get rid of custom x86 model comparison
sfi: Remove framework for deprecated firmware
cpufreq: sfi-cpufreq: Remove driver for deprecated firmware
media: atomisp: Remove unused header
mfd: intel_msic: Remove driver for deprecated platform
x86/apb_timer: Remove driver for deprecated platform
x86/platform/intel-mid: Remove unused leftovers (vRTC)
x86/platform/intel-mid: Remove unused leftovers (msic)
x86/platform/intel-mid: Remove unused leftovers (msic_thermal)
x86/platform/intel-mid: Remove unused leftovers (msic_power_btn)
x86/platform/intel-mid: Remove unused leftovers (msic_gpio)
x86/platform/intel-mid: Remove unused leftovers (msic_battery)
x86/platform/intel-mid: Remove unused leftovers (msic_ocd)
x86/platform/intel-mid: Remove unused leftovers (msic_audio)
platform/x86: intel_scu_wdt: Drop mistakenly added const
Here is the large set of char/misc/whatever driver subsystem updates for
5.12-rc1. Over time it seems like this tree is collecting more and more
tiny driver subsystems in one place, making it easier for those
maintainers, which is why this is getting larger.
Included in here are:
- coresight driver updates
- habannalabs driver updates
- virtual acrn driver addition (proper acks from the x86
maintainers)
- broadcom misc driver addition
- speakup driver updates
- soundwire driver updates
- fpga driver updates
- amba driver updates
- mei driver updates
- vfio driver updates
- greybus driver updates
- nvmeem driver updates
- phy driver updates
- mhi driver updates
- interconnect driver udpates
- fsl-mc bus driver updates
- random driver fix
- some small misc driver updates (rtsx, pvpanic, etc.)
All of these have been in linux-next for a while, with the only reported
issue being a merge conflict in include/linux/mod_devicetable.h that you
will hit in your tree due to the dfl_device_id addition from the fpga
subsystem in here. The resolution should be simple.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-----BEGIN PGP SIGNATURE-----
iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCYDZf9w8cZ3JlZ0Brcm9h
aC5jb20ACgkQMUfUDdst+yk3xgCcCEN+pCJTum+uAzSNH3YKs/onaDgAnRSVwOUw
tNW6n1JhXLYl9f5JdhvS
=MOHs
-----END PGP SIGNATURE-----
Merge tag 'char-misc-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver updates from Greg KH:
"Here is the large set of char/misc/whatever driver subsystem updates
for 5.12-rc1. Over time it seems like this tree is collecting more and
more tiny driver subsystems in one place, making it easier for those
maintainers, which is why this is getting larger.
Included in here are:
- coresight driver updates
- habannalabs driver updates
- virtual acrn driver addition (proper acks from the x86 maintainers)
- broadcom misc driver addition
- speakup driver updates
- soundwire driver updates
- fpga driver updates
- amba driver updates
- mei driver updates
- vfio driver updates
- greybus driver updates
- nvmeem driver updates
- phy driver updates
- mhi driver updates
- interconnect driver udpates
- fsl-mc bus driver updates
- random driver fix
- some small misc driver updates (rtsx, pvpanic, etc.)
All of these have been in linux-next for a while, with the only
reported issue being a merge conflict due to the dfl_device_id
addition from the fpga subsystem in here"
* tag 'char-misc-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (311 commits)
spmi: spmi-pmic-arb: Fix hw_irq overflow
Documentation: coresight: Add PID tracing description
coresight: etm-perf: Support PID tracing for kernel at EL2
coresight: etm-perf: Clarify comment on perf options
ACRN: update MAINTAINERS: mailing list is subscribers-only
regmap: sdw-mbq: use MODULE_LICENSE("GPL")
regmap: sdw: use no_pm routines for SoundWire 1.2 MBQ
regmap: sdw: use _no_pm functions in regmap_read/write
soundwire: intel: fix possible crash when no device is detected
MAINTAINERS: replace my with email with replacements
mhi: Fix double dma free
uapi: map_to_7segment: Update example in documentation
uio: uio_pci_generic: don't fail probe if pdev->irq equals to IRQ_NOTCONNECTED
drivers/misc/vmw_vmci: restrict too big queue size in qp_host_alloc_queue
firewire: replace tricky statement by two simple ones
vme: make remove callback return void
firmware: google: make coreboot driver's remove callback return void
firmware: xilinx: Use explicit values for all enum values
sample/acrn: Introduce a sample of HSM ioctl interface usage
virt: acrn: Introduce an interface for Service VM to control vCPU
...
- Make objtool work for big-endian cross compiles
- Make stack tracking via stack pointer memory operations match push/pop
semantics to prepare for architectures w/o PUSH/POP instructions.
- Add support for analyzing alternatives
- Improve retpoline detection and handling
- Improve assembly code coverage on x86
- Provide support for inlined stack switching
-----BEGIN PGP SIGNATURE-----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=0AHf
-----END PGP SIGNATURE-----
Merge tag 'objtool-core-2021-02-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull objtool updates from Thomas Gleixner:
- Make objtool work for big-endian cross compiles
- Make stack tracking via stack pointer memory operations match
push/pop semantics to prepare for architectures w/o PUSH/POP
instructions.
- Add support for analyzing alternatives
- Improve retpoline detection and handling
- Improve assembly code coverage on x86
- Provide support for inlined stack switching
* tag 'objtool-core-2021-02-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (33 commits)
objtool: Support stack-swizzle
objtool,x86: Additionally decode: mov %rsp, (%reg)
x86/unwind/orc: Change REG_SP_INDIRECT
x86/power: Support objtool validation in hibernate_asm_64.S
x86/power: Move restore_registers() to top of the file
x86/power: Annotate indirect branches as safe
x86/acpi: Support objtool validation in wakeup_64.S
x86/acpi: Annotate indirect branch as safe
x86/ftrace: Support objtool vmlinux.o validation in ftrace_64.S
x86/xen/pvh: Annotate indirect branch as safe
x86/xen: Support objtool vmlinux.o validation in xen-head.S
x86/xen: Support objtool validation in xen-asm.S
objtool: Add xen_start_kernel() to noreturn list
objtool: Combine UNWIND_HINT_RET_OFFSET and UNWIND_HINT_FUNC
objtool: Add asm version of STACK_FRAME_NON_STANDARD
objtool: Assume only ELF functions do sibling calls
x86/ftrace: Add UNWIND_HINT_FUNC annotation for ftrace_stub
objtool: Support retpoline jump detection for vmlinux.o
objtool: Fix ".cold" section suffix check for newer versions of GCC
objtool: Fix retpoline detection in asm code
...
- Support for userspace to emulate Xen hypercalls
- Raise the maximum number of user memslots
- Scalability improvements for the new MMU. Instead of the complex
"fast page fault" logic that is used in mmu.c, tdp_mmu.c uses an
rwlock so that page faults are concurrent, but the code that can run
against page faults is limited. Right now only page faults take the
lock for reading; in the future this will be extended to some
cases of page table destruction. I hope to switch the default MMU
around 5.12-rc3 (some testing was delayed due to Chinese New Year).
- Cleanups for MAXPHYADDR checks
- Use static calls for vendor-specific callbacks
- On AMD, use VMLOAD/VMSAVE to save and restore host state
- Stop using deprecated jump label APIs
- Workaround for AMD erratum that made nested virtualization unreliable
- Support for LBR emulation in the guest
- Support for communicating bus lock vmexits to userspace
- Add support for SEV attestation command
- Miscellaneous cleanups
PPC:
- Support for second data watchpoint on POWER10
- Remove some complex workarounds for buggy early versions of POWER9
- Guest entry/exit fixes
ARM64
- Make the nVHE EL2 object relocatable
- Cleanups for concurrent translation faults hitting the same page
- Support for the standard TRNG hypervisor call
- A bunch of small PMU/Debug fixes
- Simplification of the early init hypercall handling
Non-KVM changes (with acks):
- Detection of contended rwlocks (implemented only for qrwlocks,
because KVM only needs it for x86)
- Allow __DISABLE_EXPORTS from assembly code
- Provide a saner follow_pfn replacements for modules
-----BEGIN PGP SIGNATURE-----
iQFIBAABCAAyFiEE8TM4V0tmI4mGbHaCv/vSX3jHroMFAmApSRgUHHBib256aW5p
QHJlZGhhdC5jb20ACgkQv/vSX3jHroOc7wf9FnlinKoTFaSk7oeuuhF/CoCVwSFs
Z9+A2sNI99tWHQxFR6dyDkEFeQoXnqSxfLHtUVIdH/JnTg0FkEvFz3NK+0PzY1PF
PnGNbSoyhP58mSBG4gbBAxdF3ZJZMB8GBgYPeR62PvMX2dYbcHqVBNhlf6W4MQK4
5mAUuAnbf19O5N267sND+sIg3wwJYwOZpRZB7PlwvfKAGKf18gdBz5dQ/6Ej+apf
P7GODZITjqM5Iho7SDm/sYJlZprFZT81KqffwJQHWFMEcxFgwzrnYPx7J3gFwRTR
eeh9E61eCBDyCTPpHROLuNTVBqrAioCqXLdKOtO5gKvZI3zmomvAsZ8uXQ==
=uFZU
-----END PGP SIGNATURE-----
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM updates from Paolo Bonzini:
"x86:
- Support for userspace to emulate Xen hypercalls
- Raise the maximum number of user memslots
- Scalability improvements for the new MMU.
Instead of the complex "fast page fault" logic that is used in
mmu.c, tdp_mmu.c uses an rwlock so that page faults are concurrent,
but the code that can run against page faults is limited. Right now
only page faults take the lock for reading; in the future this will
be extended to some cases of page table destruction. I hope to
switch the default MMU around 5.12-rc3 (some testing was delayed
due to Chinese New Year).
- Cleanups for MAXPHYADDR checks
- Use static calls for vendor-specific callbacks
- On AMD, use VMLOAD/VMSAVE to save and restore host state
- Stop using deprecated jump label APIs
- Workaround for AMD erratum that made nested virtualization
unreliable
- Support for LBR emulation in the guest
- Support for communicating bus lock vmexits to userspace
- Add support for SEV attestation command
- Miscellaneous cleanups
PPC:
- Support for second data watchpoint on POWER10
- Remove some complex workarounds for buggy early versions of POWER9
- Guest entry/exit fixes
ARM64:
- Make the nVHE EL2 object relocatable
- Cleanups for concurrent translation faults hitting the same page
- Support for the standard TRNG hypervisor call
- A bunch of small PMU/Debug fixes
- Simplification of the early init hypercall handling
Non-KVM changes (with acks):
- Detection of contended rwlocks (implemented only for qrwlocks,
because KVM only needs it for x86)
- Allow __DISABLE_EXPORTS from assembly code
- Provide a saner follow_pfn replacements for modules"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (192 commits)
KVM: x86/xen: Explicitly pad struct compat_vcpu_info to 64 bytes
KVM: selftests: Don't bother mapping GVA for Xen shinfo test
KVM: selftests: Fix hex vs. decimal snafu in Xen test
KVM: selftests: Fix size of memslots created by Xen tests
KVM: selftests: Ignore recently added Xen tests' build output
KVM: selftests: Add missing header file needed by xAPIC IPI tests
KVM: selftests: Add operand to vmsave/vmload/vmrun in svm.c
KVM: SVM: Make symbol 'svm_gp_erratum_intercept' static
locking/arch: Move qrwlock.h include after qspinlock.h
KVM: PPC: Book3S HV: Fix host radix SLB optimisation with hash guests
KVM: PPC: Book3S HV: Ensure radix guest has no SLB entries
KVM: PPC: Don't always report hash MMU capability for P9 < DD2.2
KVM: PPC: Book3S HV: Save and restore FSCR in the P9 path
KVM: PPC: remove unneeded semicolon
KVM: PPC: Book3S HV: Use POWER9 SLBIA IH=6 variant to clear SLB
KVM: PPC: Book3S HV: No need to clear radix host SLB before loading HPT guest
KVM: PPC: Book3S HV: Fix radix guest SLB side channel
KVM: PPC: Book3S HV: Remove support for running HPT guest on RPT host without mixed mode support
KVM: PPC: Book3S HV: Introduce new capability for 2nd DAWR
KVM: PPC: Book3S HV: Add infrastructure to support 2nd DAWR
...
-----BEGIN PGP SIGNATURE-----
iQFHBAABCAAxFiEEIbPD0id6easf0xsudhRwX5BBoF4FAmArly8THHdlaS5saXVA
a2VybmVsLm9yZwAKCRB2FHBfkEGgXkRfCADB0PA4xlfVF0Na/iZoBFdNFr3EMU4K
NddGJYyk0o+gipUIj2xu7TksVw8c1/cWilXOUBe7oZRKw2/fC/0hpDwvLpPtD/wP
+Tc2DcIgwquMvsSksyqpMOb0YjNNhWCx9A9xPWawpUdg20IfbK/ekRHlFI5MsEww
7tFS+MHY4QbsPv0WggoK61PGnhGCBt/85Lv4I08ZGohA6uirwC4fNIKp83SgFNtf
1hHbvpapAFEXwZiKFbzwpue20jWJg+tlTiEFpen3exjBICoagrLLaz3F0SZJvbxl
2YY32zbBsQe4Izre5PVuOlMoNFRom9NSzEzdZT10g7HNtVrwKVNLcohS
=MyO4
-----END PGP SIGNATURE-----
Merge tag 'hyperv-next-signed-20210216' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux
Pull Hyper-V updates from Wei Liu:
- VMBus hardening patches from Andrea Parri and Andres Beltran.
- Patches to make Linux boot as the root partition on Microsoft
Hypervisor from Wei Liu.
- One patch to add a new sysfs interface to support hibernation on
Hyper-V from Dexuan Cui.
- Two miscellaneous clean-up patches from Colin and Gustavo.
* tag 'hyperv-next-signed-20210216' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux: (31 commits)
Revert "Drivers: hv: vmbus: Copy packets sent by Hyper-V out of the ring buffer"
iommu/hyperv: setup an IO-APIC IRQ remapping domain for root partition
x86/hyperv: implement an MSI domain for root partition
asm-generic/hyperv: import data structures for mapping device interrupts
asm-generic/hyperv: introduce hv_device_id and auxiliary structures
asm-generic/hyperv: update hv_interrupt_entry
asm-generic/hyperv: update hv_msi_entry
x86/hyperv: implement and use hv_smp_prepare_cpus
x86/hyperv: provide a bunch of helper functions
ACPI / NUMA: add a stub function for node_to_pxm()
x86/hyperv: handling hypercall page setup for root
x86/hyperv: extract partition ID from Microsoft Hypervisor if necessary
x86/hyperv: allocate output arg pages if required
clocksource/hyperv: use MSR-based access if running as root
Drivers: hv: vmbus: skip VMBus initialization if Linux is root
x86/hyperv: detect if Linux is the root partition
asm-generic/hyperv: change HV_CPU_POWER_MANAGEMENT to HV_CPU_MANAGEMENT
hv: hyperv.h: Replace one-element array with flexible-array in struct icmsg_negotiate
hv_netvsc: Restrict configurations on isolated guests
Drivers: hv: vmbus: Enforce 'VMBus version >= 5.2' on isolated guests
...
- Add CPU-PMU support for Intel Sapphire Rapids CPUs
- Extend the perf ABI with PERF_SAMPLE_WEIGHT_STRUCT, to offer two-parameter
sampling event feedback. Not used yet, but is intended for Golden Cove
CPU-PMU, which can provide both the instruction latency and the cache
latency information for memory profiling events.
- Remove experimental, default-disabled perfmon-v4 counter_freezing support
that could only be enabled via a boot option. The hardware is hopelessly
broken, we'd like to make sure nobody starts relying on this, as it would
only end in tears.
- Fix energy/power events on Intel SPR platforms
- Simplify the uprobes resume_execution() logic
- Misc smaller fixes.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
-----BEGIN PGP SIGNATURE-----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=BCcg
-----END PGP SIGNATURE-----
Merge tag 'perf-core-2021-02-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull performance event updates from Ingo Molnar:
- Add CPU-PMU support for Intel Sapphire Rapids CPUs
- Extend the perf ABI with PERF_SAMPLE_WEIGHT_STRUCT, to offer
two-parameter sampling event feedback. Not used yet, but is intended
for Golden Cove CPU-PMU, which can provide both the instruction
latency and the cache latency information for memory profiling
events.
- Remove experimental, default-disabled perfmon-v4 counter_freezing
support that could only be enabled via a boot option. The hardware is
hopelessly broken, we'd like to make sure nobody starts relying on
this, as it would only end in tears.
- Fix energy/power events on Intel SPR platforms
- Simplify the uprobes resume_execution() logic
- Misc smaller fixes.
* tag 'perf-core-2021-02-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/x86/rapl: Fix psys-energy event on Intel SPR platform
perf/x86/rapl: Only check lower 32bits for RAPL energy counters
perf/x86/rapl: Add msr mask support
perf/x86/kvm: Add Cascade Lake Xeon steppings to isolation_ucodes[]
perf/x86/intel: Support CPUID 10.ECX to disable fixed counters
perf/x86/intel: Add perf core PMU support for Sapphire Rapids
perf/x86/intel: Filter unsupported Topdown metrics event
perf/x86/intel: Factor out intel_update_topdown_event()
perf/core: Add PERF_SAMPLE_WEIGHT_STRUCT
perf/intel: Remove Perfmon-v4 counter_freezing support
x86/perf: Use static_call for x86_pmu.guest_get_msrs
perf/x86/intel/uncore: With > 8 nodes, get pci bus die id from NUMA info
perf/x86/intel/uncore: Store the logical die id instead of the physical die id.
x86/kprobes: Do not decode opcode in resume_execution()
[ NOTE: unfortunately this tree had to be freshly rebased today,
it's a same-content tree of 82891be90f3c (-next published)
merged with v5.11.
The main reason for the rebase was an authorship misattribution
problem with a new commit, which we noticed in the last minute,
and which we didn't want to be merged upstream. The offending
commit was deep in the tree, and dependent commits had to be
rebased as well. ]
- Core scheduler updates:
- Add CONFIG_PREEMPT_DYNAMIC: this in its current form adds the
preempt=none/voluntary/full boot options (default: full),
to allow distros to build a PREEMPT kernel but fall back to
close to PREEMPT_VOLUNTARY (or PREEMPT_NONE) runtime scheduling
behavior via a boot time selection.
There's also the /debug/sched_debug switch to do this runtime.
This feature is implemented via runtime patching (a new variant of static calls).
The scope of the runtime patching can be best reviewed by looking
at the sched_dynamic_update() function in kernel/sched/core.c.
( Note that the dynamic none/voluntary mode isn't 100% identical,
for example preempt-RCU is available in all cases, plus the
preempt count is maintained in all models, which has runtime
overhead even with the code patching. )
The PREEMPT_VOLUNTARY/PREEMPT_NONE models, used by the vast majority
of distributions, are supposed to be unaffected.
- Fix ignored rescheduling after rcu_eqs_enter(). This is a bug that
was found via rcutorture triggering a hang. The bug is that
rcu_idle_enter() may wake up a NOCB kthread, but this happens after
the last generic need_resched() check. Some cpuidle drivers fix it
by chance but many others don't.
In true 2020 fashion the original bug fix has grown into a 5-patch
scheduler/RCU fix series plus another 16 RCU patches to address
the underlying issue of missed preemption events. These are the
initial fixes that should fix current incarnations of the bug.
- Clean up rbtree usage in the scheduler, by providing & using the following
consistent set of rbtree APIs:
partial-order; less() based:
- rb_add(): add a new entry to the rbtree
- rb_add_cached(): like rb_add(), but for a rb_root_cached
total-order; cmp() based:
- rb_find(): find an entry in an rbtree
- rb_find_add(): find an entry, and add if not found
- rb_find_first(): find the first (leftmost) matching entry
- rb_next_match(): continue from rb_find_first()
- rb_for_each(): iterate a sub-tree using the previous two
- Improve the SMP/NUMA load-balancer: scan for an idle sibling in a single pass.
This is a 4-commit series where each commit improves one aspect of the idle
sibling scan logic.
- Improve the cpufreq cooling driver by getting the effective CPU utilization
metrics from the scheduler
- Improve the fair scheduler's active load-balancing logic by reducing the number
of active LB attempts & lengthen the load-balancing interval. This improves
stress-ng mmapfork performance.
- Fix CFS's estimated utilization (util_est) calculation bug that can result in
too high utilization values
- Misc updates & fixes:
- Fix the HRTICK reprogramming & optimization feature
- Fix SCHED_SOFTIRQ raising race & warning in the CPU offlining code
- Reduce dl_add_task_root_domain() overhead
- Fix uprobes refcount bug
- Process pending softirqs in flush_smp_call_function_from_idle()
- Clean up task priority related defines, remove *USER_*PRIO and
USER_PRIO()
- Simplify the sched_init_numa() deduplication sort
- Documentation updates
- Fix EAS bug in update_misfit_status(), which degraded the quality
of energy-balancing
- Smaller cleanups
Signed-off-by: Ingo Molnar <mingo@kernel.org>
-----BEGIN PGP SIGNATURE-----
iQJFBAABCgAvFiEEBpT5eoXrXCwVQwEKEnMQ0APhK1gFAmAtHBsRHG1pbmdvQGtl
cm5lbC5vcmcACgkQEnMQ0APhK1itgg/+NGed12pgPjYBzesdou60Lvx7LZLGjfOt
M1F1EnmQGn/hEH2fCY6ZoqIZQTVltm7GIcBNabzYTzlaHZsdtyuDUJBZyj19vTlk
zekcj7WVt+qvfjChaNwEJhQ9nnOM/eohMgEOHMAAJd9zlnQvve7NOLQ56UDM+kn/
9taFJ5ZPvb4avP6C5p3KivvKex6Bjof/Tl0m3utpNyPpI/qK3FyGxwdgCxU0yepT
ABWQX5ZQCufFvo1bgnBPfqyzab4MqhoM3bNKBsLQfuAlssG1xRv4KQOev4dRwrt9
pXJikV5C9yez5d2lGe5p0ltH5IZS/l9x2yI/ZQj3OUDTFyV1ic6WfFAqJgDzVF8E
i/vvA4NPQiI241Bkps+ErcCw4aVOgiY6TWli74cHjLUIX0+As6aHrFWXGSxUmiHB
WR+B8KmdfzRTTlhOxMA+cvlpZcKCfxWkJJmXzr/lDZzIuKPqM3QCE2wD9sixkfVo
JNICT0IvZghWOdbMEfZba8Psh/e2LVI9RzdpEiuYJz1ZrVlt1hO0M6jBxY0hMz9n
k54z81xODw0a8P2FHMtpmB1vhAeqCmvwA6DO8z0Oxs0DFi+KM2bLf2efHsCKafI+
Bm5v9YFaOk/55R76hJVh+aYLlyFgFkKd+P/niJTPDnxOk3SqJuXvTrql1HeGHkNr
kYgQa23dsZk=
=pyaG
-----END PGP SIGNATURE-----
Merge tag 'sched-core-2021-02-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler updates from Ingo Molnar:
"Core scheduler updates:
- Add CONFIG_PREEMPT_DYNAMIC: this in its current form adds the
preempt=none/voluntary/full boot options (default: full), to allow
distros to build a PREEMPT kernel but fall back to close to
PREEMPT_VOLUNTARY (or PREEMPT_NONE) runtime scheduling behavior via
a boot time selection.
There's also the /debug/sched_debug switch to do this runtime.
This feature is implemented via runtime patching (a new variant of
static calls).
The scope of the runtime patching can be best reviewed by looking
at the sched_dynamic_update() function in kernel/sched/core.c.
( Note that the dynamic none/voluntary mode isn't 100% identical,
for example preempt-RCU is available in all cases, plus the
preempt count is maintained in all models, which has runtime
overhead even with the code patching. )
The PREEMPT_VOLUNTARY/PREEMPT_NONE models, used by the vast
majority of distributions, are supposed to be unaffected.
- Fix ignored rescheduling after rcu_eqs_enter(). This is a bug that
was found via rcutorture triggering a hang. The bug is that
rcu_idle_enter() may wake up a NOCB kthread, but this happens after
the last generic need_resched() check. Some cpuidle drivers fix it
by chance but many others don't.
In true 2020 fashion the original bug fix has grown into a 5-patch
scheduler/RCU fix series plus another 16 RCU patches to address the
underlying issue of missed preemption events. These are the initial
fixes that should fix current incarnations of the bug.
- Clean up rbtree usage in the scheduler, by providing & using the
following consistent set of rbtree APIs:
partial-order; less() based:
- rb_add(): add a new entry to the rbtree
- rb_add_cached(): like rb_add(), but for a rb_root_cached
total-order; cmp() based:
- rb_find(): find an entry in an rbtree
- rb_find_add(): find an entry, and add if not found
- rb_find_first(): find the first (leftmost) matching entry
- rb_next_match(): continue from rb_find_first()
- rb_for_each(): iterate a sub-tree using the previous two
- Improve the SMP/NUMA load-balancer: scan for an idle sibling in a
single pass. This is a 4-commit series where each commit improves
one aspect of the idle sibling scan logic.
- Improve the cpufreq cooling driver by getting the effective CPU
utilization metrics from the scheduler
- Improve the fair scheduler's active load-balancing logic by
reducing the number of active LB attempts & lengthen the
load-balancing interval. This improves stress-ng mmapfork
performance.
- Fix CFS's estimated utilization (util_est) calculation bug that can
result in too high utilization values
Misc updates & fixes:
- Fix the HRTICK reprogramming & optimization feature
- Fix SCHED_SOFTIRQ raising race & warning in the CPU offlining code
- Reduce dl_add_task_root_domain() overhead
- Fix uprobes refcount bug
- Process pending softirqs in flush_smp_call_function_from_idle()
- Clean up task priority related defines, remove *USER_*PRIO and
USER_PRIO()
- Simplify the sched_init_numa() deduplication sort
- Documentation updates
- Fix EAS bug in update_misfit_status(), which degraded the quality
of energy-balancing
- Smaller cleanups"
* tag 'sched-core-2021-02-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (51 commits)
sched,x86: Allow !PREEMPT_DYNAMIC
entry/kvm: Explicitly flush pending rcuog wakeup before last rescheduling point
entry: Explicitly flush pending rcuog wakeup before last rescheduling point
rcu/nocb: Trigger self-IPI on late deferred wake up before user resume
rcu/nocb: Perform deferred wake up before last idle's need_resched() check
rcu: Pull deferred rcuog wake up to rcu_eqs_enter() callers
sched/features: Distinguish between NORMAL and DEADLINE hrtick
sched/features: Fix hrtick reprogramming
sched/deadline: Reduce rq lock contention in dl_add_task_root_domain()
uprobes: (Re)add missing get_uprobe() in __find_uprobe()
smp: Process pending softirqs in flush_smp_call_function_from_idle()
sched: Harden PREEMPT_DYNAMIC
static_call: Allow module use without exposing static_call_key
sched: Add /debug/sched_preempt
preempt/dynamic: Support dynamic preempt with preempt= boot option
preempt/dynamic: Provide irqentry_exit_cond_resched() static call
preempt/dynamic: Provide preempt_schedule[_notrace]() static calls
preempt/dynamic: Provide cond_resched() and might_resched() static calls
preempt: Introduce CONFIG_PREEMPT_DYNAMIC
static_call: Provide DEFINE_STATIC_CALL_RET0()
...
The "oprofile" user-space tools don't use the kernel OPROFILE support any more,
and haven't in a long time. User-space has been converted to the perf
interfaces.
The dcookies stuff is only used by the oprofile code. Now that oprofile's
support is getting removed from the kernel, there is no need for dcookies as
well.
Remove kernel's old oprofile and dcookies support.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=I2Ac
-----END PGP SIGNATURE-----
Merge tag 'oprofile-removal-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/linux
Pull oprofile and dcookies removal from Viresh Kumar:
"Remove oprofile and dcookies support
The 'oprofile' user-space tools don't use the kernel OPROFILE support
any more, and haven't in a long time. User-space has been converted to
the perf interfaces.
The dcookies stuff is only used by the oprofile code. Now that
oprofile's support is getting removed from the kernel, there is no
need for dcookies as well.
Remove kernel's old oprofile and dcookies support"
* tag 'oprofile-removal-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/linux:
fs: Remove dcookies support
drivers: Remove CONFIG_OPROFILE support
arch: xtensa: Remove CONFIG_OPROFILE support
arch: x86: Remove CONFIG_OPROFILE support
arch: sparc: Remove CONFIG_OPROFILE support
arch: sh: Remove CONFIG_OPROFILE support
arch: s390: Remove CONFIG_OPROFILE support
arch: powerpc: Remove oprofile
arch: powerpc: Stop building and using oprofile
arch: parisc: Remove CONFIG_OPROFILE support
arch: mips: Remove CONFIG_OPROFILE support
arch: microblaze: Remove CONFIG_OPROFILE support
arch: ia64: Remove rest of perfmon support
arch: ia64: Remove CONFIG_OPROFILE support
arch: hexagon: Don't select HAVE_OPROFILE
arch: arc: Remove CONFIG_OPROFILE support
arch: arm: Remove CONFIG_OPROFILE support
arch: alpha: Remove CONFIG_OPROFILE support
Pull ELF compat updates from Al Viro:
"Sanitizing ELF compat support, especially for triarch architectures:
- X32 handling cleaned up
- MIPS64 uses compat_binfmt_elf.c both for O32 and N32 now
- Kconfig side of things regularized
Eventually I hope to have compat_binfmt_elf.c killed, with both native
and compat built from fs/binfmt_elf.c, with -DELF_BITS={64,32} passed
by kbuild, but that's a separate story - not included here"
* 'work.elf-compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
get rid of COMPAT_ELF_EXEC_PAGESIZE
compat_binfmt_elf: don't bother with undef of ELF_ARCH
Kconfig: regularize selection of CONFIG_BINFMT_ELF
mips compat: switch to compat_binfmt_elf.c
mips: don't bother with ELF_CORE_EFLAGS
mips compat: don't bother with ELF_ET_DYN_BASE
mips: KVM_GUEST makes no sense for 64bit builds...
mips: kill unused definitions in binfmt_elf[on]32.c
mips binfmt_elf*32.c: use elfcore-compat.h
x32: make X32, !IA32_EMULATION setups able to execute x32 binaries
[amd64] clean PRSTATUS_SIZE/SET_PR_FPVALID up properly
elf_prstatus: collect the common part (everything before pr_reg) into a struct
binfmt_elf: partially sanitize PRSTATUS_SIZE and SET_PR_FPVALID
when accessing a task's resctrl fields concurrently.
-----BEGIN PGP SIGNATURE-----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=hY6T
-----END PGP SIGNATURE-----
Merge tag 'x86_cache_for_v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 resource control updates from Borislav Petkov:
"Avoid IPI-ing a task in certain cases and prevent load/store tearing
when accessing a task's resctrl fields concurrently"
* tag 'x86_cache_for_v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/resctrl: Apply READ_ONCE/WRITE_ONCE to task_struct.{rmid,closid}
x86/resctrl: Use task_curr() instead of task_struct->on_cpu to prevent unnecessary IPI
x86/resctrl: Add printf attribute to log function
-----BEGIN PGP SIGNATURE-----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=XADP
-----END PGP SIGNATURE-----
Merge tag 'x86_cpu_for_v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 CPUID cleanup from Borislav Petkov:
"Assign a dedicated feature word to a CPUID leaf which is widely used"
* tag 'x86_cpu_for_v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/cpufeatures: Assign dedicated feature word for CPUID_0x8000001F[EAX]
(FNINIT) explicitly when using the FPU + cleanups.
-----BEGIN PGP SIGNATURE-----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=fJU1
-----END PGP SIGNATURE-----
Merge tag 'x86_fpu_for_v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 FPU updates from Borislav Petkov:
"x86 fpu usage optimization and cleanups:
- make 64-bit kernel code which uses 387 insns request a x87 init
(FNINIT) explicitly when using the FPU
- misc cleanups"
* tag 'x86_fpu_for_v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/fpu/xstate: Use sizeof() instead of a constant
x86/fpu/64: Don't FNINIT in kernel_fpu_begin()
x86/fpu: Make the EFI FPU calling convention explicit
- Another initial cleanup - more to follow - to the fault handling code.
- Other minor cleanups and corrections.
-----BEGIN PGP SIGNATURE-----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=uVEk
-----END PGP SIGNATURE-----
Merge tag 'x86_mm_for_v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 mm cleanups from Borislav Petkov:
- PTRACE_GETREGS/PTRACE_PUTREGS regset selection cleanup
- Another initial cleanup - more to follow - to the fault handling
code.
- Other minor cleanups and corrections.
* tag 'x86_mm_for_v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (23 commits)
x86/{fault,efi}: Fix and rename efi_recover_from_page_fault()
x86/fault: Don't run fixups for SMAP violations
x86/fault: Don't look for extable entries for SMEP violations
x86/fault: Rename no_context() to kernelmode_fixup_or_oops()
x86/fault: Bypass no_context() for implicit kernel faults from usermode
x86/fault: Split the OOPS code out from no_context()
x86/fault: Improve kernel-executing-user-memory handling
x86/fault: Correct a few user vs kernel checks wrt WRUSS
x86/fault: Document the locking in the fault_signal_pending() path
x86/fault/32: Move is_f00f_bug() to do_kern_addr_fault()
x86/fault: Fold mm_fault_error() into do_user_addr_fault()
x86/fault: Skip the AMD erratum #91 workaround on unaffected CPUs
x86/fault: Fix AMD erratum #91 errata fixup for user code
x86/Kconfig: Remove HPET_EMULATE_RTC depends on RTC
x86/asm: Fixup TASK_SIZE_MAX comment
x86/ptrace: Clean up PTRACE_GETREGS/PTRACE_PUTREGS regset selection
x86/vm86/32: Remove VM86_SCREEN_BITMAP support
x86: Remove definition of DEBUG
x86/entry: Remove now unused do_IRQ() declaration
x86/mm: Remove duplicate definition of _PAGE_PAT_LARGE
...
kernel patching facilities and getting rid of the custom-grown ones.
-----BEGIN PGP SIGNATURE-----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=BvOi
-----END PGP SIGNATURE-----
Merge tag 'x86_paravirt_for_v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 paravirt updates from Borislav Petkov:
"Part one of a major conversion of the paravirt infrastructure to our
kernel patching facilities and getting rid of the custom-grown ones"
* tag 'x86_paravirt_for_v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/pv: Rework arch_local_irq_restore() to not use popf
x86/xen: Drop USERGS_SYSRET64 paravirt call
x86/pv: Switch SWAPGS to ALTERNATIVE
x86/xen: Use specific Xen pv interrupt entry for DF
x86/xen: Use specific Xen pv interrupt entry for MCE
A few cleanups left and right, some of which were part of a initrd
measured boot series that needs some more work, and so only the cleanup
patches have been included for this release.
-----BEGIN PGP SIGNATURE-----
iQGzBAABCgAdFiEE+9lifEBpyUIVN1cpw08iOZLZjyQFAmAQUrwACgkQw08iOZLZ
jySQqwv+J29DtGV3QSYBLQcgCWJLBndO8kcpz2voEhFeQRkTdg9oTRnD0OMOEOY5
xnfr9nvsc4miskOi1I6wDT+j22MouNGxhJrI0755a+ce+/MN2JpMsgMvSzu94upp
N5lgtSTC3F5W8uzkXZ268N3p0zepJhHYVjjpzGwhaRsaE8w51952VaocTxmL6/su
vl797lVfVhF/gQ/HrEnN/45Ti8drTQ65hZ5Jv5RyTPpwQW0n3BV2Vhi3U6SG7zwY
ZBtdXGNWMV1mEvYf44UoaQoSo2fwcWjpY/bcrDvUt8HVeNU6yAkuOs5Sv4gkACbG
tC/M0SeCnSOc1CmKfUTc5o+50ROnT+CZZwwXJ1YQHfdqN4ZuLTswN5eH3PFSMBfl
1gxK5zX/iq0ntaF/e1frSZpp+67/mSSxFLgEi3OLl5FdKZXXTjQkydXx9rifLl1B
iUEW9DbCXoFiE0P1F8U//oPCJynw7IjG1LhueaXYmarwHIGStxkh05Es8oFlz6JZ
EZhqiuEr
=6iND
-----END PGP SIGNATURE-----
Merge tag 'efi-next-for-v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull EFI updates from Ard Biesheuvel via Borislav Petkov:
"A few cleanups left and right, some of which were part of a initrd
measured boot series that needs some more work, and so only the
cleanup patches have been included for this release"
* tag 'efi-next-for-v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
efi/arm64: Update debug prints to reflect other entropy sources
efi: x86: clean up previous struct mm switching
efi: x86: move mixed mode stack PA variable out of 'efi_scratch'
efi/libstub: move TPM related prototypes into efistub.h
efi/libstub: fix prototype of efi_tcg2_protocol::get_event_log()
efi/libstub: whitespace cleanup
efi: ia64: move IA64-only declarations to new asm/efi.h header
- Identify CPUs which miss to enter the broadcast handler, as an
additional debugging aid.
-----BEGIN PGP SIGNATURE-----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=EOJc
-----END PGP SIGNATURE-----
Merge tag 'ras_updates_for_v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull RAS updates from Borislav Petkov:
- move therm_throt.c to the thermal framework, where it belongs.
- identify CPUs which miss to enter the broadcast handler, as an
additional debugging aid.
* tag 'ras_updates_for_v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
thermal: Move therm_throt there from x86/mce
x86/mce: Get rid of mcheck_intel_therm_init()
x86/mce: Make mce_timed_out() identify holdout CPUs
Remove several exports from the MMU that are no longer necessary.
No functional change intended.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210213005015.1651772-15-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Stop setting dirty bits for MMU pages when dirty logging is disabled for
a memslot, as PML is now completely disabled when there are no memslots
with dirty logging enabled.
This means that spurious PML entries will be created for memslots with
dirty logging disabled if at least one other memslot has dirty logging
enabled. However, spurious PML entries are already possible since
dirty bits are set only when a dirty logging is turned off, i.e. memslots
that are never dirty logged will have dirty bits cleared.
In the end, it's faster overall to eat a few spurious PML entries in the
window where dirty logging is being disabled across all memslots.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210213005015.1651772-13-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Currently, if enable_pml=1 PML remains enabled for the entire lifetime
of the VM irrespective of whether dirty logging is enable or disabled.
When dirty logging is disabled, all the pages of the VM are manually
marked dirty, so that PML is effectively non-operational. Setting
the dirty bits is an expensive operation which can cause severe MMU
lock contention in a performance sensitive path when dirty logging is
disabled after a failed or canceled live migration.
Manually setting dirty bits also fails to prevent PML activity if some
code path clears dirty bits, which can incur unnecessary VM-Exits.
In order to avoid this extra overhead, dynamically enable/disable PML
when dirty logging gets turned on/off for the first/last memslot.
Signed-off-by: Makarand Sonare <makarandsonare@google.com>
Co-developed-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210213005015.1651772-12-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Drop the facade of KVM's PML logic being vendor specific and move the
bits that aren't truly VMX specific into common x86 code. The MMU logic
for dealing with PML is tightly coupled to the feature and to VMX's
implementation, bouncing through kvm_x86_ops obfuscates the code without
providing any meaningful separation of concerns or encapsulation.
No functional change intended.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210213005015.1651772-10-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Store the vendor-specific dirty log size in a variable, there's no need
to wrap it in a function since the value is constant after
hardware_setup() runs.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210213005015.1651772-9-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Allow building x86 with PREEMPT_DYNAMIC=n, this is needed for
PREEMPT_RT as it makes no sense to not have full preemption on
PREEMPT_RT.
Fixes: 8c98e8cf723c ("preempt/dynamic: Provide preempt_schedule[_notrace]() static calls")
Reported-by: Mike Galbraith <efault@gmx.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Mike Galbraith <efault@gmx.de>
Link: https://lkml.kernel.org/r/YCK1+JyFNxQnWeXK@hirez.programming.kicks-ass.net
Use the new EXPORT_STATIC_CALL_TRAMP() / static_call_mod() to unexport
the static_call_key for the PREEMPT_DYNAMIC calls such that modules
can no longer update these calls.
Having modules change/hi-jack the preemption calls would be horrible.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
When exporting static_call_key; with EXPORT_STATIC_CALL*(), the module
can use static_call_update() to change the function called. This is
not desirable in general.
Not exporting static_call_key however also disallows usage of
static_call(), since objtool needs the key to construct the
static_call_site.
Solve this by allowing objtool to create the static_call_site using
the trampoline address when it builds a module and cannot find the
static_call_key symbol. The module loader will then try and map the
trampole back to a key before it constructs the normal sites list.
Doing this requires a trampoline -> key associsation, so add another
magic section that keeps those.
Originally-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lkml.kernel.org/r/20210127231837.ifddpn7rhwdaepiu@treble
Provide static calls to control preempt_schedule[_notrace]()
(called in CONFIG_PREEMPT) so that we can override their behaviour when
preempt= is overriden.
Since the default behaviour is full preemption, both their calls are
initialized to the arch provided wrapper, if any.
[fweisbec: only define static calls when PREEMPT_DYNAMIC, make it less
dependent on x86 with __preempt_schedule_func]
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lkml.kernel.org/r/20210118141223.123667-7-frederic@kernel.org
Update Copyright year and drop file names from files themselves.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
After the commit f1be6cdaf5 ("x86/platform/intel-mid: Make
intel_scu_device_register() static") the platform_device.h is not being
used anymore by intel-mid.h. Remove it.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Since there is no more user of this global variable and associated custom API,
we may safely drop this legacy reinvented a wheel from the kernel sources.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
The header is used by a single user. Move header content to that user.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
SFI-based platforms are gone. So does this framework.
This removes mention of SFI through the drivers and other code as well.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
- Make the nVHE EL2 object relocatable, resulting in much more
maintainable code
- Handle concurrent translation faults hitting the same page
in a more elegant way
- Support for the standard TRNG hypervisor call
- A bunch of small PMU/Debug fixes
- Allow the disabling of symbol export from assembly code
- Simplification of the early init hypercall handling
-----BEGIN PGP SIGNATURE-----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=6EwV
-----END PGP SIGNATURE-----
Merge tag 'kvmarm-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD
KVM/arm64 updates for Linux 5.12
- Make the nVHE EL2 object relocatable, resulting in much more
maintainable code
- Handle concurrent translation faults hitting the same page
in a more elegant way
- Support for the standard TRNG hypervisor call
- A bunch of small PMU/Debug fixes
- Allow the disabling of symbol export from assembly code
- Simplification of the early init hypercall handling
