Linux Kernel https://git.etezian.org/cgit.cgi/linux.git/atom?h=vm-bind 2022-05-24T01:01:31+00:00 2022-05-24T01:01:31+00:00 Linus Torvalds torvalds@linux-foundation.org 2022-05-24T01:01:31+00:00 urn:sha1:c5a3d3c01e90e74166f95eec9db6fcc3ba72a9d6 Pull x86 CPU feature updates from Borislav Petkov: - Remove a bunch of chicken bit options to turn off CPU features which are not really needed anymore - Misc fixes and cleanups * tag 'x86_cpu_for_v5.19_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/speculation: Add missing prototype for unpriv_ebpf_notify() x86/pm: Fix false positive kmemleak report in msr_build_context() x86/speculation/srbds: Do not try to turn mitigation off when not supported x86/cpu: Remove "noclflush" x86/cpu: Remove "noexec" x86/cpu: Remove "nosmep" x86/cpu: Remove CONFIG_X86_SMAP and "nosmap" x86/cpu: Remove "nosep" x86/cpu: Allow feature bit names from /proc/cpuinfo in clearcpuid= 2022-04-07T14:47:12+00:00 Michael Roth michael.roth@amd.com 2022-03-07T21:33:50+00:00 urn:sha1:ba37a1438aeb540cc48722d629f4b2e7e4398466 For debugging purposes it is very useful to have a way to see the full contents of the SNP CPUID table provided to a guest. Add an sev=debug kernel command-line option to do so. Also introduce some infrastructure so that additional options can be specified via sev=option1[,option2] over time in a consistent manner. [ bp: Massage, simplify string parsing. ] Suggested-by: Borislav Petkov <bp@alien8.de> Signed-off-by: Michael Roth <michael.roth@amd.com> Signed-off-by: Borislav Petkov <bp@suse.de> Link: https://lore.kernel.org/r/20220307213356.2797205-41-brijesh.singh@amd.com 2022-04-04T08:17:03+00:00 Borislav Petkov bp@suse.de 2022-01-27T11:56:25+00:00 urn:sha1:76ea0025a214cdf0d2c204f4c21cbffa9fb57c32 It doesn't make any sense to disable non-executable mappings - security-wise or else. So rip out that switch and move the remaining code into setup.c and delete setup_nx.c Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Lai Jiangshan <jiangshanlai@gmail.com> Reviewed-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20220127115626.14179-6-bp@alien8.de 2022-02-23T10:09:25+00:00 Borislav Petkov bp@suse.de 2021-12-20T20:43:28+00:00 urn:sha1:7f1b8e0d6360178e3527d4f14e6921c254a86035 This is pretty much unused and not really useful. What is more, all relevant MCA hardware has recoverable machine checks support so there's no real need to tweak MCA tolerance levels in order to *maybe* extend machine lifetime. So rip it out. Signed-off-by: Borislav Petkov <bp@suse.de> Link: https://lore.kernel.org/r/YcDq8PxvKtTENl/e@zn.tnic 2021-10-05T14:24:15+00:00 Mauro Carvalho Chehab mchehab+huawei@kernel.org 2021-09-30T09:44:51+00:00 urn:sha1:edfc8730ba45eac3cca20dba3799d6ae6c584b56 Reduce the gap of missing ABIs for Intel servers with MCE by adding a new ABI file. The contents of this file comes from: Documentation/x86/x86_64/machinecheck.rst Reviewed-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Link: https://lore.kernel.org/r/801a26985e32589eb78ba4b728d3e19fdea18f04.1632994837.git.mchehab+huawei@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 2021-09-08T23:28:14+00:00 Linus Torvalds torvalds@linux-foundation.org 2021-09-08T23:28:14+00:00 urn:sha1:0f4b9289bad354b606190a4cd54d5222b4e41d98 Pull more documentation updates from Jonathan Corbet: "Another collection of documentation patches, mostly fixes but also includes another set of traditional Chinese translations" * tag 'docs-5.15-2' of git://git.lwn.net/linux: docs: pdfdocs: Fix typo in CJK-language specific font settings docs: kernel-hacking: Remove inappropriate text docs/zh_TW: add translations for zh_TW/filesystems docs/zh_TW: add translations for zh_TW/cpu-freq docs/zh_TW: add translations for zh_TW/arm64 docs/zh_CN: Modify the translator tag and fix the wrong word Documentation/features/vm: correct huge-vmap APIs Documentation: block: blk-mq: Fix small typo in multi-queue docs Documentation: in_irq() cleanup Documentation: arm: marvell: Add 88F6825 model into list Documentation/process/maintainer-pgp-guide: Replace broken link to PGP path finder Documentation: locking: fix references Documentation: Update details of The Linux Kernel Module Programming Guide docs: x86: Remove obsolete information about x86_64 vmalloc() faulting Documentation/process/applying-patches: Activate linux-next man hyperlink 2021-08-20T17:14:11+00:00 Peilin Ye peilin.ye@bytedance.com 2021-08-18T22:01:23+00:00 urn:sha1:251a7b3edc197a3947b8cb56fffe61d811aba0a5 x86_64 vmalloc() mappings are no longer "synchronized" among page tables via faulting since commit 6eb82f994026 ("x86/mm: Pre-allocate P4D/PUD pages for vmalloc area"), since the corresponding P4D or PUD pages are now preallocated at boot, by preallocate_vmalloc_pages(). Drop the "lazily synchronized" description for less confusion. While this file is x86_64-specific, it is worth noting that things are different for x86_32, where vmalloc()-related changes to `init_mm.pgd` are synchronized to all page tables in the system during runtime, via arch_sync_kernel_mappings(). Unfortunately, this synchronization is subject to race condition, which is further handled via faulting, see vmalloc_fault(). See commit 4819e15f740e ("x86/mm/32: Bring back vmalloc faulting on x86_32") for more details. Reviewed-by: Muchun Song <songmuchun@bytedance.com> Signed-off-by: Peilin Ye <peilin.ye@bytedance.com> Reviewed-by: Joerg Roedel <jroedel@suse.de> Link: https://lore.kernel.org/r/20210818220123.2623-1-yepeilin.cs@gmail.com Signed-off-by: Jonathan Corbet <corbet@lwn.net> 2021-08-12T10:06:58+00:00 Paul Gortmaker paul.gortmaker@windriver.com 2021-05-30T16:24:46+00:00 urn:sha1:12febc181886f0658ce3413f554203c255d338dd commit 5955633e91bf ("x86/reboot: Skip DMI checks if reboot set by user") made it so that it's not required to recompile the kernel in order to bypass broken reboot quirks compiled into an image: * This variable is used privately to keep track of whether or not * reboot_type is still set to its default value (i.e., reboot= hasn't * been set on the command line). This is needed so that we can * suppress DMI scanning for reboot quirks. Without it, it's * impossible to override a faulty reboot quirk without recompiling. However, at the time it was not eally documented outside the source code, and so this information isn't really available to the average user out there. The change is a little white lie and invented "reboot=default" since it is easy to remember, and documents well. The truth is that any random string that is *not* a currently accepted string will work. Since that doesn't document well for non-coders, and since it's unknown what the future additions might be, lay claim on "default" since that is exactly what it achieves. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/r/20210530162447.996461-3-paul.gortmaker@windriver.com 2021-08-12T10:06:58+00:00 Paul Gortmaker paul.gortmaker@windriver.com 2021-05-30T16:24:45+00:00 urn:sha1:162a5284faf41b2441b8f686f9ac4771c7a8f669 It is mentioned in the top level non-arch specific file but it was overlooked here for x86. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/r/20210530162447.996461-2-paul.gortmaker@windriver.com 2021-06-10T16:19:36+00:00 Hubert Jasudowicz hubert.jasudowicz@gmail.com 2021-06-09T21:51:12+00:00 urn:sha1:0e5a89dbb49920cea22193044bbbfd76a9b0f458 The Calgary IOMMU driver has been removed in 90dc392fc445 ("x86: Remove the calgary IOMMU driver") Clean up stale docs that refer to it. Signed-off-by: Hubert Jasudowicz <hubert.jasudowicz@gmail.com> Signed-off-by: Borislav Petkov <bp@suse.de> Link: https://lkml.kernel.org/r/1bd2b57dd1db53df09e520b8170ff61418805de4.1623274832.git.hubert.jasudowicz@gmail.com