#
638c335a |
| 14-Nov-2022 |
Arnaldo Carvalho de Melo <acme@redhat.com> |
Merge remote-tracking branch 'torvalds/master' into perf/core
To pick up fixes that went thru perf/urgent.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Revision tags: v6.1-rc5 |
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#
74bd160f |
| 11-Nov-2022 |
Linus Torvalds <torvalds@linux-foundation.org> |
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull kvm "This is a pretty large diffstat for this time of the release. The main culprit is a reorganization of the AMD assembly
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull kvm "This is a pretty large diffstat for this time of the release. The main culprit is a reorganization of the AMD assembly trampoline, allowing percpu variables to be accessed early.
This is needed for the return stack depth tracking retbleed mitigation that will be in 6.2, but it also makes it possible to tighten the IBRS restore on vmexit. The latter change is a long tail of the spectrev2/retbleed patches (the corresponding Intel change was simpler and went in already last June), which is why I am including it right now instead of sharing a topic branch with tip.
Being assembly and being rich in comments makes the line count balloon a bit, but I am pretty confident in the change (famous last words) because the reorganization actually makes everything simpler and more understandable than before. It has also had external review and has been tested on the aforementioned 6.2 changes, which explode quite brutally without the fix.
Apart from this, things are pretty normal.
s390:
- PCI fix
- PV clock fix
x86:
- Fix clash between PMU MSRs and other MSRs
- Prepare SVM assembly trampoline for 6.2 retbleed mitigation and for...
- ... tightening IBRS restore on vmexit, moving it before the first RET or indirect branch
- Fix log level for VMSA dump
- Block all page faults during kvm_zap_gfn_range()
Tools:
- kvm_stat: fix incorrect detection of debugfs
- kvm_stat: update vmexit definitions"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: x86/mmu: Block all page faults during kvm_zap_gfn_range() KVM: x86/pmu: Limit the maximum number of supported AMD GP counters KVM: x86/pmu: Limit the maximum number of supported Intel GP counters KVM: x86/pmu: Do not speculatively query Intel GP PMCs that don't exist yet KVM: SVM: Only dump VMSA to klog at KERN_DEBUG level tools/kvm_stat: update exit reasons for vmx/svm/aarch64/userspace tools/kvm_stat: fix incorrect detection of debugfs x86, KVM: remove unnecessary argument to x86_virt_spec_ctrl and callers KVM: SVM: move MSR_IA32_SPEC_CTRL save/restore to assembly KVM: SVM: restore host save area from assembly KVM: SVM: move guest vmsave/vmload back to assembly KVM: SVM: do not allocate struct svm_cpu_data dynamically KVM: SVM: remove dead field from struct svm_cpu_data KVM: SVM: remove unused field from struct vcpu_svm KVM: SVM: retrieve VMCB from assembly KVM: SVM: adjust register allocation for __svm_vcpu_run() KVM: SVM: replace regs argument of __svm_vcpu_run() with vcpu_svm KVM: x86: use a separate asm-offsets.c file KVM: s390: pci: Fix allocation size of aift kzdev elements KVM: s390: pv: don't allow userspace to set the clock under PV
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#
debc5a1e |
| 08-Nov-2022 |
Paolo Bonzini <pbonzini@redhat.com> |
KVM: x86: use a separate asm-offsets.c file
This already removes an ugly #include "" from asm-offsets.c, but especially it avoids a future error when trying to define asm-offsets for KVM's svm/svm.h
KVM: x86: use a separate asm-offsets.c file
This already removes an ugly #include "" from asm-offsets.c, but especially it avoids a future error when trying to define asm-offsets for KVM's svm/svm.h header.
This would not work for kernel/asm-offsets.c, because svm/svm.h includes kvm_cache_regs.h which is not in the include path when compiling asm-offsets.c. The problem is not there if the .c file is in arch/x86/kvm.
Suggested-by: Sean Christopherson <seanjc@google.com> Cc: stable@vger.kernel.org Fixes: a149180fbcf3 ("x86: Add magic AMD return-thunk") Reviewed-by: Sean Christopherson <seanjc@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Revision tags: v6.1-rc4, v6.1-rc3, v6.1-rc2 |
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#
14e77332 |
| 22-Oct-2022 |
Nick Terrell <terrelln@fb.com> |
Merge branch 'main' into zstd-next
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Revision tags: v6.1-rc1, v6.0, v6.0-rc7, v6.0-rc6 |
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#
5d821386 |
| 15-Sep-2022 |
Thomas Gleixner <tglx@linutronix.de> |
x86/retbleed: Add SKL return thunk
To address the Intel SKL RSB underflow issue in software it's required to do call depth tracking.
Provide a return thunk for call depth tracking on Intel SKL CPUs
x86/retbleed: Add SKL return thunk
To address the Intel SKL RSB underflow issue in software it's required to do call depth tracking.
Provide a return thunk for call depth tracking on Intel SKL CPUs.
The tracking does not use a counter. It uses uses arithmetic shift right on call entry and logical shift left on return.
The depth tracking variable is initialized to 0x8000.... when the call depth is zero. The arithmetic shift right sign extends the MSB and saturates after the 12th call. The shift count is 5 so the tracking covers 12 nested calls. On return the variable is shifted left logically so it becomes zero again.
CALL RET 0: 0x8000000000000000 0x0000000000000000 1: 0xfc00000000000000 0xf000000000000000 ... 11: 0xfffffffffffffff8 0xfffffffffffffc00 12: 0xffffffffffffffff 0xffffffffffffffe0
After a return buffer fill the depth is credited 12 calls before the next stuffing has to take place.
There is a inaccuracy for situations like this:
10 calls 5 returns 3 calls 4 returns 3 calls ....
The shift count might cause this to be off by one in either direction, but there is still a cushion vs. the RSB depth. The algorithm does not claim to be perfect, but it should obfuscate the problem enough to make exploitation extremly difficult.
The theory behind this is:
RSB is a stack with depth 16 which is filled on every call. On the return path speculation "pops" entries to speculate down the call chain. Once the speculative RSB is empty it switches to other predictors, e.g. the Branch History Buffer, which can be mistrained by user space and misguide the speculation path to a gadget.
Call depth tracking is designed to break this speculation path by stuffing speculation trap calls into the RSB which are never getting a corresponding return executed. This stalls the prediction path until it gets resteered,
The assumption is that stuffing at the 12th return is sufficient to break the speculation before it hits the underflow and the fallback to the other predictors. Testing confirms that it works. Johannes, one of the retbleed researchers. tried to attack this approach but failed.
There is obviously no scientific proof that this will withstand future research progress, but all we can do right now is to speculate about it.
The SAR/SHL usage was suggested by Andi Kleen.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/r/20220915111147.890071690@infradead.org
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#
c063a217 |
| 15-Sep-2022 |
Thomas Gleixner <tglx@linutronix.de> |
x86/percpu: Move current_top_of_stack next to current_task
Extend the struct pcpu_hot cacheline with current_top_of_stack; another very frequently used value.
Signed-off-by: Thomas Gleixner <tglx@l
x86/percpu: Move current_top_of_stack next to current_task
Extend the struct pcpu_hot cacheline with current_top_of_stack; another very frequently used value.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/r/20220915111145.493038635@infradead.org
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#
5f8f8574 |
| 10-Oct-2022 |
Dmitry Torokhov <dmitry.torokhov@gmail.com> |
Merge branch 'next' into for-linus
Prepare input updates for 6.1 merge window.
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#
97acb6a8 |
| 03-Oct-2022 |
Tvrtko Ursulin <tvrtko.ursulin@intel.com> |
Merge drm/drm-next into drm-intel-gt-next
Daniele needs 84d4333c1e28 ("misc/mei: Add NULL check to component match callback functions") in order to merge the DG2 HuC patches.
Signed-off-by: Tvrtko
Merge drm/drm-next into drm-intel-gt-next
Daniele needs 84d4333c1e28 ("misc/mei: Add NULL check to component match callback functions") in order to merge the DG2 HuC patches.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
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#
305a72ef |
| 02-Oct-2022 |
Dan Williams <dan.j.williams@intel.com> |
Merge branch 'for-6.1/nvdimm' into libnvdimm-for-next
Add v6.1 content on top of some straggling updates that missed v6.0.
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#
70d1b1a7 |
| 27-Sep-2022 |
Leon Romanovsky <leonro@nvidia.com> |
Merge branch 'mlx5-vfio' into mlx5-next
Merge net/mlx5 dependencies for device DMA logging.
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
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#
b3bbcc5d |
| 25-Sep-2022 |
Dan Williams <dan.j.williams@intel.com> |
Merge branch 'for-6.0/dax' into libnvdimm-fixes
Pick up another "Soft Reservation" fix for v6.0-final on top of some straggling nvdimm fixes that missed v5.19.
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#
a108772d |
| 14-Sep-2022 |
Maxime Ripard <maxime@cerno.tech> |
Merge drm/drm-next into drm-misc-next
We need 6.0-rc1 to merge the backlight rework PR.
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
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Revision tags: v6.0-rc5 |
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#
2a906db2 |
| 06-Sep-2022 |
Tony Lindgren <tony@atomide.com> |
Merge branch 'am5748-fix' into fixes
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Revision tags: v6.0-rc4 |
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#
917bda9a |
| 29-Aug-2022 |
Jani Nikula <jani.nikula@intel.com> |
Merge drm/drm-next into drm-intel-next
Sync drm-intel-next with v6.0-rc as well as recent drm-intel-gt-next.
Since drm-next does not have commit f0c70d41e4e8 ("drm/i915/guc: remove runtime info pri
Merge drm/drm-next into drm-intel-next
Sync drm-intel-next with v6.0-rc as well as recent drm-intel-gt-next.
Since drm-next does not have commit f0c70d41e4e8 ("drm/i915/guc: remove runtime info printing from time stamp logging") yet, only drm-intel-gt-next, will need to do that as part of the merge here to build.
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
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Revision tags: v6.0-rc3, v6.0-rc2 |
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#
93fbff11 |
| 17-Aug-2022 |
Dmitry Torokhov <dmitry.torokhov@gmail.com> |
Merge branch 'i2c/make_remove_callback_void-immutable' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux into next
Sync up with the latest I2C code base to get updated prototype of I2C bus
Merge branch 'i2c/make_remove_callback_void-immutable' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux into next
Sync up with the latest I2C code base to get updated prototype of I2C bus remove() method.
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#
cf36ae3e |
| 17-Aug-2022 |
Thomas Zimmermann <tzimmermann@suse.de> |
Merge drm/drm-fixes into drm-misc-fixes
Backmerging for v6.0-rc1.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
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Revision tags: v6.0-rc1 |
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#
fc30eea1 |
| 04-Aug-2022 |
Rodrigo Vivi <rodrigo.vivi@intel.com> |
Merge drm/drm-next into drm-intel-next
Sync up. In special to get the drm-intel-gt-next stuff.
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
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#
8bb5e7f4 |
| 02-Aug-2022 |
Dmitry Torokhov <dmitry.torokhov@gmail.com> |
Merge branch 'next' into for-linus
Prepare input updates for 5.20 (or 6.0) merge window.
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Revision tags: v5.19 |
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#
82b6c2e7 |
| 29-Jul-2022 |
Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
Merge branches 'pm-cpufreq' and 'pm-cpuidle'
Merge processor power management changes for v5.20-rc1:
- Make cpufreq_show_cpus() more straightforward (Viresh Kumar).
- Drop unnecessary CPU hotplu
Merge branches 'pm-cpufreq' and 'pm-cpuidle'
Merge processor power management changes for v5.20-rc1:
- Make cpufreq_show_cpus() more straightforward (Viresh Kumar).
- Drop unnecessary CPU hotplug locking from store() used by cpufreq sysfs attributes (Viresh Kumar).
- Make the ACPI cpufreq driver support the boost control interface on Zhaoxin/Centaur processors (Tony W Wang-oc).
- Print a warning message on attempts to free an active cpufreq policy which should never happen (Viresh Kumar).
- Fix grammar in the Kconfig help text for the loongson2 cpufreq driver (Randy Dunlap).
- Use cpumask_var_t for an on-stack CPU mask in the ondemand cpufreq governor (Zhao Liu).
- Add trace points for guest_halt_poll_ns grow/shrink to the haltpoll cpuidle driver (Eiichi Tsukata).
- Modify intel_idle to treat C1 and C1E as independent idle states on Sapphire Rapids (Artem Bityutskiy).
* pm-cpufreq: cpufreq: ondemand: Use cpumask_var_t for on-stack cpu mask cpufreq: loongson2: fix Kconfig "its" grammar cpufreq: Warn users while freeing active policy cpufreq: ACPI: Add Zhaoxin/Centaur turbo boost control interface support cpufreq: Drop unnecessary cpus locking from store() cpufreq: Optimize cpufreq_show_cpus()
* pm-cpuidle: intel_idle: make SPR C1 and C1E be independent cpuidle: haltpoll: Add trace points for guest_halt_poll_ns grow/shrink
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#
3c69a99b |
| 25-Jul-2022 |
Michael Ellerman <mpe@ellerman.id.au> |
Merge tag 'v5.19-rc7' into fixes
Merge v5.19-rc7 into fixes to bring in: d11219ad53dc ("amdgpu: disable powerpc support for the newer display engine")
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#
4effe18f |
| 25-Jul-2022 |
Jens Axboe <axboe@kernel.dk> |
Merge branch 'for-5.20/io_uring' into for-5.20/io_uring-zerocopy-send
* for-5.20/io_uring: (716 commits) io_uring: ensure REQ_F_ISREG is set async offload net: fix compat pointer in get_compat_m
Merge branch 'for-5.20/io_uring' into for-5.20/io_uring-zerocopy-send
* for-5.20/io_uring: (716 commits) io_uring: ensure REQ_F_ISREG is set async offload net: fix compat pointer in get_compat_msghdr() io_uring: Don't require reinitable percpu_ref io_uring: fix types in io_recvmsg_multishot_overflow io_uring: Use atomic_long_try_cmpxchg in __io_account_mem io_uring: support multishot in recvmsg net: copy from user before calling __get_compat_msghdr net: copy from user before calling __copy_msghdr io_uring: support 0 length iov in buffer select in compat io_uring: fix multishot ending when not polled io_uring: add netmsg cache io_uring: impose max limit on apoll cache io_uring: add abstraction around apoll cache io_uring: move apoll cache to poll.c io_uring: consolidate hash_locked io-wq handling io_uring: clear REQ_F_HASH_LOCKED on hash removal io_uring: don't race double poll setting REQ_F_ASYNC_DATA io_uring: don't miss setting REQ_F_DOUBLE_POLL io_uring: disable multishot recvmsg io_uring: only trace one of complete or overflow ...
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Revision tags: v5.19-rc8 |
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#
dc14036f |
| 18-Jul-2022 |
Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
Merge 5.19-rc7 into usb-next
We need the USB fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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#
0698461a |
| 18-Jul-2022 |
Arnaldo Carvalho de Melo <acme@redhat.com> |
Merge remote-tracking branch 'torvalds/master' into perf/core
To update the perf/core codebase.
Fix conflict by moving arch__post_evsel_config(evsel, attr) to the end of evsel__config(), after what
Merge remote-tracking branch 'torvalds/master' into perf/core
To update the perf/core codebase.
Fix conflict by moving arch__post_evsel_config(evsel, attr) to the end of evsel__config(), after what was added in:
49c692b7dfc9b6c0 ("perf offcpu: Accept allowed sample types only")
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Revision tags: v5.19-rc7 |
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#
816cd168 |
| 14-Jul-2022 |
Jakub Kicinski <kuba@kernel.org> |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
include/net/sock.h 310731e2f161 ("net: Fix data-races around sysctl_mem.") e70f3c701276 ("Revert "net: set SK_MEM_QUANTUM to 4096""
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
include/net/sock.h 310731e2f161 ("net: Fix data-races around sysctl_mem.") e70f3c701276 ("Revert "net: set SK_MEM_QUANTUM to 4096"") https://lore.kernel.org/all/20220711120211.7c8b7cba@canb.auug.org.au/
net/ipv4/fib_semantics.c 747c14307214 ("ip: fix dflt addr selection for connected nexthop") d62607c3fe45 ("net: rename reference+tracking helpers")
net/tls/tls.h include/net/tls.h 3d8c51b25a23 ("net/tls: Check for errors in tls_device_init") 587903142308 ("tls: create an internal header")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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#
f83d9396 |
| 14-Jul-2022 |
Thomas Zimmermann <tzimmermann@suse.de> |
Merge drm/drm-next into drm-misc-next-fixes
Backmerging from drm/drm-next for the final fixes that will go into v5.20.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
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