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2020-04-23net/mlx5: Update mr.c new cmd interfaceLeon Romanovsky1-11/+9
Do mass update of mr.c to reuse newly introduced mlx5_cmd_exec_in*() interfaces. Reviewed-by: Moshe Shemesh <moshe@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2020-04-23net/mlx5: Update mcg.c new cmd interfaceLeon Romanovsky1-6/+4
Do mass update of mcg.c to reuse newly introduced mlx5_cmd_exec_in*() interfaces. Reviewed-by: Moshe Shemesh <moshe@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2020-04-23net/mlx5: Update main.c new cmd interfaceLeon Romanovsky1-22/+13
Do mass update of main.c to reuse newly introduced mlx5_cmd_exec_in*() interfaces. Reviewed-by: Moshe Shemesh <moshe@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2020-04-23net/mlx5: Update vxlan.c new cmd interfaceLeon Romanovsky1-6/+4
Do mass update of vxlan.c to reuse newly introduced mlx5_cmd_exec_in*() interfaces. Reviewed-by: Moshe Shemesh <moshe@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2020-04-23net/mlx5: Update mpfs.c new cmd interfaceLeon Romanovsky1-6/+4
Do mass update of mpfs.c to reuse newly introduced mlx5_cmd_exec_in*() interfaces. Reviewed-by: Moshe Shemesh <moshe@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2020-04-23net/mlx5: Update gid.c new cmd interfaceLeon Romanovsky1-3/+2
Do mass update of gid.c to reuse newly introduced mlx5_cmd_exec_in*() interfaces. Reviewed-by: Moshe Shemesh <moshe@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2020-04-23net/mlx5: Update lag.c new cmd interfaceLeon Romanovsky1-35/+17
Do mass update of lag.c to reuse newly introduced mlx5_cmd_exec_in*() interfaces. Reviewed-by: Moshe Shemesh <moshe@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2020-04-23net/mlx5: Update fw.c new cmd interfaceLeon Romanovsky1-20/+13
Do mass update of fw.c to reuse newly introduced mlx5_cmd_exec_in*() interfaces. Reviewed-by: Moshe Shemesh <moshe@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2020-04-23net/mlx5: Update fs_core new cmd interfaceLeon Romanovsky1-49/+31
Do mass update of fs_core to reuse newly introduced mlx5_cmd_exec_in*() interfaces. Reviewed-by: Moshe Shemesh <moshe@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2020-04-23net/mlx5: Update FPGA to new cmd interfaceLeon Romanovsky1-15/+13
Do mass update of FPGA to reuse newly introduced mlx5_cmd_exec_in*() interfaces. Reviewed-by: Moshe Shemesh <moshe@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2020-04-23net/mlx5: Update eswitch to new cmd interfaceLeon Romanovsky3-42/+20
Do mass update of eswitch to reuse newly introduced mlx5_cmd_exec_in*() interfaces. Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2020-04-23net/mlx5: Update statistics to new cmd interfaceLeon Romanovsky2-44/+19
Do mass update of statistics to reuse newly introduced mlx5_cmd_exec_in*() interfaces. Reviewed-by: Moshe Shemesh <moshe@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2020-04-23net/mlx5: Update eq.c to new cmd interfaceLeon Romanovsky1-3/+2
Do mass update of eq.c to reuse newly introduced mlx5_cmd_exec_in*() interfaces. Reviewed-by: Moshe Shemesh <moshe@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2020-04-23net/mlx5: Update ecpf.c to new cmd interfaceLeon Romanovsky1-24/+6
Do mass update of ecpf.c to reuse newly introduced mlx5_cmd_exec_in*() interfaces. Reviewed-by: Moshe Shemesh <moshe@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2020-04-23net/mlx5: Update debugfs.c to new cmd interfaceLeon Romanovsky1-11/+4
Do mass update of debugfs.c to reuse newly introduced mlx5_cmd_exec_in*() interfaces. Reviewed-by: Moshe Shemesh <moshe@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2020-04-23net/mlx5: Update cq.c to new cmd interfaceLeon Romanovsky4-16/+12
Do mass update of cq.c to reuse newly introduced mlx5_cmd_exec_in*() interfaces. Reviewed-by: Moshe Shemesh <moshe@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2020-04-23net/mlx5: Update vport.c to new cmd interfaceLeon Romanovsky4-80/+71
Do mass update of vport.c to reuse newly introduced mlx5_cmd_exec_in*() interfaces. Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2020-04-19net/mlx5: Enable SW-defined RoCEv2 UDP source portMark Zhang2-1/+36
When this is enabled, UDP source port for RoCEv2 packets are defined by software instead of firmware. Signed-off-by: Mark Zhang <markz@mellanox.com> Reviewed-by: Maor Gottlieb <maorg@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2020-04-19net/mlx5: Refactor HCA capability set flowLeon Romanovsky1-52/+31
Reduce the amount of kzalloc/kfree cycles by allocating command structure in the parent function and leverage the knowledge that set_caps() is called for HCA capabilities only with specific HW structure as parameter to calculate mailbox size. Acked-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2020-04-19net/mlx5: Move QP logic to mlx5_ibLeon Romanovsky16-317/+180
The mlx5_core doesn't need any functionality coded in qp.c, so move that file to drivers/infiniband/ be under mlx5_ib responsibility. Reviewed-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2020-04-19RDMA/mlx5: Alphabetically sort build artifactsLeon Romanovsky1-7/+20
Sort .o objects in makefile to make addition of new object less cumbersome. Reviewed-by: Maor Gottlieb <maorg@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2020-04-19net/mlx5: Delete not-used cmd headerLeon Romanovsky15-15/+0
The structures defined in the cmd header are not used and can be safely removed from the driver. This patch removes that file and deletes all relevant includes. Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2020-04-19RDMA/mlx5: Delete Q counter allocations commandLeon Romanovsky4-31/+20
Remove mlx5_ib implementation of Q counter allocation logic together with cleaning boolean which controlled validity of the counter. It is not needed, because counter_id == 0 means that counter is not valid. Reviewed-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2020-04-19net/mlx5: Remove Q counter low level helper APIsLeon Romanovsky5-92/+80
mlx5 core users are encouraged to use low level API (mlx5_cmd_exec) without the need of helper functions, do this for q counters, remove helper functions and call mlx5_cmd_exec directly from users. This will help reduce the total amount of code and reduction of the mlx5_core symbol table. Reviewed-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2020-04-19net/mlx5: Replace hand written QP context struct with automatic gettersLeon Romanovsky1-31/+20
By changing debugfs to not use any QP related API, convert the debugfs code to use MLX5_GET() directly to access QP context instead of hand written struct. Reviewed-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2020-04-19net/mlx5: Remove extra indirection while storing QPNLeon Romanovsky7-67/+64
The FPGA, SW steering and IPoIB need to have only QPN from the mlx5_core_qp struct, so reduce memory footprint by storing QPN directly. Reviewed-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2020-04-19net/mlx5: Open-code modify QP in the IPoIB moduleLeon Romanovsky1-34/+42
Remove dependency on qp.c from the IPoIB by open coding modify QP interface. Reviewed-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2020-04-19net/mlx5: Open-code modify QP in the FPGA moduleLeon Romanovsky1-56/+28
Remove dependency on qp.c from the FPGA by open coding modify QP interface. Reviewed-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2020-04-19net/mlx5: Open-code modify QP in steering moduleLeon Romanovsky1-7/+12
Remove dependency on qp.c from SW steering by open coding modify QP interface. Reviewed-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2020-04-19net/mlx5: Remove empty QP and CQ events handlersLeon Romanovsky2-33/+0
The QP and CQ events functions do nothing except printing some debug messages. There is nothing to do with this knowledge and such events, so remove them. Reviewed-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2020-04-19net/mlx5: Open-code create and destroy QP callsLeon Romanovsky3-33/+39
FPGA, IPoIB and SW steering don't need anything from the mlx5_core_create_qp() and mlx5_core_destroy_qp() except calls to mlx5_cmd_exec(). Let's open-code it, so we will be able to move qp.c to mlx5_ib. Reviewed-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2020-04-19net/mlx5: Provide simplified command interfacesLeon Romanovsky1-0/+13
Many mlx5_cmd_exec() callers are not interested in the output from that command or have standard in/out structures. Those callers simply allocate those structure on the stack and use sizeof() to provide in/out arguments. In this naive approach provide simplified versions of mlx5_cmd_exec(). Reviewed-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2020-04-12Linux 5.7-rc1v5.7-rc1Linus Torvalds1-2/+2
2020-04-12MAINTAINERS: sort field names for all entriesLinus Torvalds1-1974/+1974
This sorts the actual field names too, potentially causing even more chaos and confusion at merge time if you have edited the MAINTAINERS file. But the end result is a more consistent layout, and hopefully it's a one-time pain minimized by doing this just before the -rc1 release. This was entirely scripted: ./scripts/parse-maintainers.pl --input=MAINTAINERS --output=MAINTAINERS --order Requested-by: Joe Perches <joe@perches.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-04-12MAINTAINERS: sort entries by entry nameLinus Torvalds1-820/+820
They are all supposed to be sorted, but people who add new entries don't always know the alphabet. Plus sometimes the entry names get edited, and people don't then re-order the entry. Let's see how painful this will be for merging purposes (the MAINTAINERS file is often edited in various different trees), but Joe claims there's relatively few patches in -next that touch this, and doing it just before -rc1 is likely the best time. Fingers crossed. This was scripted with /scripts/parse-maintainers.pl --input=MAINTAINERS --output=MAINTAINERS but then I also ended up manually upper-casing a few entry names that stood out when looking at the end result. Requested-by: Joe Perches <joe@perches.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-04-12Merge tag 'x86-urgent-2020-04-12' of ↵Linus Torvalds4-9/+79
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 fixes from Thomas Gleixner: "A set of three patches to fix the fallout of the newly added split lock detection feature. It addressed the case where a KVM guest triggers a split lock #AC and KVM reinjects it into the guest which is not prepared to handle it. Add proper sanity checks which prevent the unconditional injection into the guest and handles the #AC on the host side in the same way as user space detections are handled. Depending on the detection mode it either warns and disables detection for the task or kills the task if the mode is set to fatal" * tag 'x86-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: KVM: VMX: Extend VMXs #AC interceptor to handle split lock #AC in guest KVM: x86: Emulate split-lock access as a write in emulator x86/split_lock: Provide handle_guest_split_lock()
2020-04-12Merge tag 'timers-urgent-2020-04-12' of ↵Linus Torvalds3-0/+10
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull time(keeping) updates from Thomas Gleixner: - Fix the time_for_children symlink in /proc/$PID/ so it properly reflects that it part of the 'time' namespace - Add the missing userns limit for the allowed number of time namespaces, which was half defined but the actual array member was not added. This went unnoticed as the array has an exessive empty member at the end but introduced a user visible regression as the output was corrupted. - Prevent further silent ucount corruption by adding a BUILD_BUG_ON() to catch half updated data. * tag 'timers-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: ucount: Make sure ucounts in /proc/sys/user don't regress again time/namespace: Add max_time_namespaces ucount time/namespace: Fix time_for_children symlink
2020-04-12Merge tag 'sched-urgent-2020-04-12' of ↵Linus Torvalds5-62/+51
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull scheduler fixes/updates from Thomas Gleixner: - Deduplicate the average computations in the scheduler core and the fair class code. - Fix a raise between runtime distribution and assignement which can cause exceeding the quota by up to 70%. - Prevent negative results in the imbalanace calculation - Remove a stale warning in the workqueue code which can be triggered since the call site was moved out of preempt disabled code. It's a false positive. - Deduplicate the print macros for procfs - Add the ucmap values to the SCHED_DEBUG procfs output for completness * tag 'sched-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: sched/debug: Add task uclamp values to SCHED_DEBUG procfs sched/debug: Factor out printing formats into common macros sched/debug: Remove redundant macro define sched/core: Remove unused rq::last_load_update_tick workqueue: Remove the warning in wq_worker_sleeping() sched/fair: Fix negative imbalance in imbalance calculation sched/fair: Fix race between runtime distribution and assignment sched/fair: Align rq->avg_idle and rq->avg_scan_cost
2020-04-12Merge tag 'perf-urgent-2020-04-12' of ↵Linus Torvalds4-31/+573
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf fixes from Thomas Gleixner: "Three fixes/updates for perf: - Fix the perf event cgroup tracking which tries to track the cgroup even for disabled events. - Add Ice Lake server support for uncore events - Disable pagefaults when retrieving the physical address in the sampling code" * tag 'perf-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf/core: Disable page faults when getting phys address perf/x86/intel/uncore: Add Ice Lake server uncore support perf/cgroup: Correct indirection in perf_less_group_idx() perf/core: Fix event cgroup tracking
2020-04-12Merge tag 'locking-urgent-2020-04-12' of ↵Linus Torvalds3-26/+51
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull locking fixes from Thomas Gleixner: "Three small fixes/updates for the locking core code: - Plug a task struct reference leak in the percpu rswem implementation. - Document the refcount interaction with PID_MAX_LIMIT - Improve the 'invalid wait context' data dump in lockdep so it contains all information which is required to decode the problem" * tag 'locking-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: locking/lockdep: Improve 'invalid wait context' splat locking/refcount: Document interaction with PID_MAX_LIMIT locking/percpu-rwsem: Fix a task_struct refcount
2020-04-12Merge tag '5.7-rc-smb3-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6Linus Torvalds12-238/+272
Pull cifs fixes from Steve French: "Ten cifs/smb fixes: - five RDMA (smbdirect) related fixes - add experimental support for swap over SMB3 mounts - also a fix which improves performance of signed connections" * tag '5.7-rc-smb3-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6: smb3: enable swap on SMB3 mounts smb3: change noisy error message to FYI smb3: smbdirect support can be configured by default cifs: smbd: Do not schedule work to send immediate packet on every receive cifs: smbd: Properly process errors on ib_post_send cifs: Allocate crypto structures on the fly for calculating signatures of incoming packets cifs: smbd: Update receive credits before sending and deal with credits roll back on failure before sending cifs: smbd: Check send queue size before posting a send cifs: smbd: Merge code to track pending packets cifs: ignore cached share root handle closing errors
2020-04-12Merge tag 'nfs-for-5.7-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfsLinus Torvalds1-0/+1
Pull NFS client bugfix from Trond Myklebust: "Fix an RCU read lock leakage in pnfs_alloc_ds_commits_list()" * tag 'nfs-for-5.7-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: pNFS: Fix RCU lock leakage
2020-04-11Merge tag 'nios2-v5.7-rc1' of ↵Linus Torvalds5-11/+13
git://git.kernel.org/pub/scm/linux/kernel/git/lftan/nios2 Pull nios2 updates from Ley Foon Tan: - Remove nios2-dev@lists.rocketboards.org from MAINTAINERS - remove 'resetvalue' property - rename 'altr,gpio-bank-width' -> 'altr,ngpio' - enable the common clk subsystem on Nios2 * tag 'nios2-v5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/lftan/nios2: MAINTAINERS: Remove nios2-dev@lists.rocketboards.org arch: nios2: remove 'resetvalue' property arch: nios2: rename 'altr,gpio-bank-width' -> 'altr,ngpio' arch: nios2: Enable the common clk subsystem on Nios2
2020-04-11Merge tag 'dma-mapping-5.7-1' of git://git.infradead.org/users/hch/dma-mappingLinus Torvalds2-4/+8
Pull dma-mapping fixes from Christoph Hellwig: - fix an integer truncation in dma_direct_get_required_mask (Kishon Vijay Abraham) - fix the display of dma mapping types (Grygorii Strashko) * tag 'dma-mapping-5.7-1' of git://git.infradead.org/users/hch/dma-mapping: dma-debug: fix displaying of dma allocation type dma-direct: fix data truncation in dma_direct_get_required_mask()
2020-04-11Merge tag 'kbuild-v5.7-2' of ↵Linus Torvalds61-519/+384
git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull more Kbuild updates from Masahiro Yamada: - raise minimum supported binutils version to 2.23 - remove old CONFIG_AS_* macros that we know binutils >= 2.23 supports - move remaining CONFIG_AS_* tests to Kconfig from Makefile - enable -Wtautological-compare warnings to catch more issues - do not support GCC plugins for GCC <= 4.7 - fix various breakages of 'make xconfig' - include the linker version used for linking the kernel into LINUX_COMPILER, which is used for the banner, and also exposed to /proc/version - link lib-y objects to vmlinux forcibly when CONFIG_MODULES=y, which allows us to remove the lib-ksyms.o workaround, and to solve the last known issue of the LLVM linker - add dummy tools in scripts/dummy-tools/ to enable all compiler tests in Kconfig, which will be useful for distro maintainers - support the single switch, LLVM=1 to use Clang and all LLVM utilities instead of GCC and Binutils. - support LLVM_IAS=1 to enable the integrated assembler, which is still experimental * tag 'kbuild-v5.7-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (36 commits) kbuild: fix comment about missing include guard detection kbuild: support LLVM=1 to switch the default tools to Clang/LLVM kbuild: replace AS=clang with LLVM_IAS=1 kbuild: add dummy toolchains to enable all cc-option etc. in Kconfig kbuild: link lib-y objects to vmlinux forcibly when CONFIG_MODULES=y MIPS: fw: arc: add __weak to prom_meminit and prom_free_prom_memory kbuild: remove -I$(srctree)/tools/include from scripts/Makefile kbuild: do not pass $(KBUILD_CFLAGS) to scripts/mkcompile_h Documentation/llvm: fix the name of llvm-size kbuild: mkcompile_h: Include $LD version in /proc/version kconfig: qconf: Fix a few alignment issues kconfig: qconf: remove some old bogus TODOs kconfig: qconf: fix support for the split view mode kconfig: qconf: fix the content of the main widget kconfig: qconf: Change title for the item window kconfig: qconf: clean deprecated warnings gcc-plugins: drop support for GCC <= 4.7 kbuild: Enable -Wtautological-compare x86: update AS_* macros to binutils >=2.23, supporting ADX and AVX2 crypto: x86 - clean up poly1305-x86_64-cryptogams.S by 'make clean' ...
2020-04-11mailmap: Add Sedat Dilek (replacement for expired email address)Sedat Dilek1-0/+1
I do not longer work for credativ Germany. Please, use my private email address instead. This is for the case when people want to CC me on patches sent from my old business email address. Signed-off-by: Sedat Dilek <sedat.dilek@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-04-11pNFS: Fix RCU lock leakageTrond Myklebust1-0/+1
Another brown paper bag moment. pnfs_alloc_ds_commits_list() is leaking the RCU lock. Fixes: a9901899b649 ("pNFS: Add infrastructure for cleaning up per-layout commit structures") Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2020-04-11KVM: VMX: Extend VMXs #AC interceptor to handle split lock #AC in guestXiaoyao Li1-3/+34
Two types of #AC can be generated in Intel CPUs: 1. legacy alignment check #AC 2. split lock #AC Reflect #AC back into the guest if the guest has legacy alignment checks enabled or if split lock detection is disabled. If the #AC is not a legacy one and split lock detection is enabled, then invoke handle_guest_split_lock() which will either warn and disable split lock detection for this task or force SIGBUS on it. [ tglx: Switch it to handle_guest_split_lock() and rename the misnamed helper function. ] Suggested-by: Sean Christopherson <sean.j.christopherson@intel.com> Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com> Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Borislav Petkov <bp@suse.de> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Link: https://lkml.kernel.org/r/20200410115517.176308876@linutronix.de
2020-04-11KVM: x86: Emulate split-lock access as a write in emulatorXiaoyao Li1-1/+11
Emulate split-lock accesses as writes if split lock detection is on to avoid #AC during emulation, which will result in a panic(). This should never occur for a well-behaved guest, but a malicious guest can manipulate the TLB to trigger emulation of a locked instruction[1]. More discussion can be found at [2][3]. [1] https://lkml.kernel.org/r/8c5b11c9-58df-38e7-a514-dc12d687b198@redhat.com [2] https://lkml.kernel.org/r/20200131200134.GD18946@linux.intel.com [3] https://lkml.kernel.org/r/20200227001117.GX9940@linux.intel.com Suggested-by: Sean Christopherson <sean.j.christopherson@intel.com> Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com> Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Borislav Petkov <bp@suse.de> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Link: https://lkml.kernel.org/r/20200410115517.084300242@linutronix.de
2020-04-11x86/split_lock: Provide handle_guest_split_lock()Thomas Gleixner2-5/+34
Without at least minimal handling for split lock detection induced #AC, VMX will just run into the same problem as the VMWare hypervisor, which was reported by Kenneth. It will inject the #AC blindly into the guest whether the guest is prepared or not. Provide a function for guest mode which acts depending on the host SLD mode. If mode == sld_warn, treat it like user space, i.e. emit a warning, disable SLD and mark the task accordingly. Otherwise force SIGBUS. [ bp: Add a !CPU_SUP_INTEL stub for handle_guest_split_lock(). ] Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Borislav Petkov <bp@suse.de> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Link: https://lkml.kernel.org/r/20200410115516.978037132@linutronix.de Link: https://lkml.kernel.org/r/20200402123258.895628824@linutronix.de
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