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* sgx: Migrate to use macro LINUX_IOCTL_SET to register linux ioctl handlerZhenlei Huang2025-10-201-10/+1
| | | | | | Reviewed by: markj MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D53158
* vm_page: make iter_insert() publicDoug Moore2025-05-091-32/+30
| | | | | | | | | In places where vm_page_insert() is used after lookups, or for consecutive pages, use vm_page_iter_insert instead, to exploit locality. Reviewed by: kib, markj Differential Revision: https://reviews.freebsd.org/D50248
* sgx: replace tailq pointers with iteratorsDoug Moore2025-04-191-10/+17
| | | | | | | | In sgx code, use iterators to replace tailq pointers for page manipulation. Reviewed by: kib Differential Revision: https://reviews.freebsd.org/D49919
* sgx: Add a simple cdev_pg_path methodJohn Baldwin2025-03-271-0/+7
| | | | | | | This uses the constant string of "sgx" as the pathname Reviewed by: br, kib Differential Revision: https://reviews.freebsd.org/D49336
* Remove stray whitespaces from sys/amd64/Joshua Rogers2024-09-211-1/+1
| | | | | | Signed-off-by: Joshua Rogers <Joshua@Joshua.Hu> Reviewed by: imp Pull Request: https://github.com/freebsd/freebsd-src/pull/1418
* Reduce reliance on sys/sysproto.h pollutionBrooks Davis2024-04-151-0/+1
| | | | | | | | | | | Add sys/errno.h, sys/malloc.h, sys/queue.h, and vm/uma.h as needed. sys/sysproto.h currently includes sys/acl.h which currently includes sys/param.h, sys/queue.h, and vm/uma.h which in turn bring in sys/errno.h sys/malloc.h. Reviewed by: kib Differential Revision: https://reviews.freebsd.org/D44465
* sys: Automated cleanup of cdefs and other formattingWarner Losh2023-11-272-2/+0
| | | | | | | | | | | | | | | | Apply the following automated changes to try to eliminate no-longer-needed sys/cdefs.h includes as well as now-empty blank lines in a row. Remove /^#if.*\n#endif.*\n#include\s+<sys/cdefs.h>.*\n/ Remove /\n+#include\s+<sys/cdefs.h>.*\n+#if.*\n#endif.*\n+/ Remove /\n+#if.*\n#endif.*\n+/ Remove /^#if.*\n#endif.*\n/ Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/types.h>/ Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/param.h>/ Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/capsicum.h>/ Sponsored by: Netflix
* sys: Remove $FreeBSD$: one-line .c patternWarner Losh2023-08-162-4/+0
| | | | Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/
* sys: Remove $FreeBSD$: two-line .h patternWarner Losh2023-08-162-4/+0
| | | | Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/
* sgx: Remove unused variable.John Baldwin2022-04-081-2/+0
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* Convert remaining cap_rights_init users to cap_rights_init_oneMateusz Guzik2021-01-121-1/+2
| | | | | | | | | | | | | semantic patch: @@ expression rights, r; @@ - cap_rights_init(&rights, r) + cap_rights_init_one(&rights, r)
* amd64: clean up empty lines in .c and .h filesMateusz Guzik2020-09-011-1/+0
| | | | Notes: svn path=/head/; revision=365067
* Fix a few places that free a page from an object without busy held. This isJeff Roberson2019-12-021-8/+12
| | | | | | | | | | | tightening constraints on busy as a precursor to lockless page lookup and should largely be a NOP for these cases. Reviewed by: alc, kib, markj Differential Revision: https://reviews.freebsd.org/D22611 Notes: svn path=/head/; revision=355314
* (4/6) Protect page valid with the busy lock.Jeff Roberson2019-10-151-2/+2
| | | | | | | | | | | | | | Atomics are used for page busy and valid state when the shared busy is held. The details of the locking protocol and valid and dirty synchronization are in the updated vm_page.h comments. Reviewed by: kib, markj Tested by: pho Sponsored by: Netflix, Intel Differential Revision: https://reviews.freebsd.org/D21594 Notes: svn path=/head/; revision=353539
* Change synchonization rules for vm_page reference counting.Mark Johnston2019-09-091-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There are several mechanisms by which a vm_page reference is held, preventing the page from being freed back to the page allocator. In particular, holding the page's object lock is sufficient to prevent the page from being freed; holding the busy lock or a wiring is sufficent as well. These references are protected by the page lock, which must therefore be acquired for many per-page operations. This results in false sharing since the page locks are external to the vm_page structures themselves and each lock protects multiple structures. Transition to using an atomically updated per-page reference counter. The object's reference is counted using a flag bit in the counter. A second flag bit is used to atomically block new references via pmap_extract_and_hold() while removing managed mappings of a page. Thus, the reference count of a page is guaranteed not to increase if the page is unbusied, unmapped, and the object's write lock is held. As a consequence of this, the page lock no longer protects a page's identity; operations which move pages between objects are now synchronized solely by the objects' locks. The vm_page_wire() and vm_page_unwire() KPIs are changed. The former requires that either the object lock or the busy lock is held. The latter no longer has a return value and may free the page if it releases the last reference to that page. vm_page_unwire_noq() behaves the same as before; the caller is responsible for checking its return value and freeing or enqueuing the page as appropriate. vm_page_wire_mapped() is introduced for use in pmap_extract_and_hold(). It fails if the page is concurrently being unmapped, typically triggering a fallback to the fault handler. vm_page_wire() no longer requires the page lock and vm_page_unwire() now internally acquires the page lock when releasing the last wiring of a page (since the page lock still protects a page's queue state). In particular, synchronization details are no longer leaked into the caller. The change excises the page lock from several frequently executed code paths. In particular, vm_object_terminate() no longer bounces between page locks as it releases an object's pages, and direct I/O and sendfile(SF_NOCACHE) completions no longer require the page lock. In these latter cases we now get linear scalability in the common scenario where different threads are operating on different files. __FreeBSD_version is bumped. The DRM ports have been updated to accomodate the KPI changes. Reviewed by: jeff (earlier version) Tested by: gallatin (earlier version), pho Sponsored by: Netflix Differential Revision: https://reviews.freebsd.org/D20486 Notes: svn path=/head/; revision=352110
* Add a return value to vm_page_remove().Mark Johnston2019-06-261-1/+1
| | | | | | | | | | | | | | | | | | Use it to indicate whether the page may be safely freed following its removal from the object. Also change vm_page_remove() to assume that the page's object pointer is non-NULL, and have callers perform this check instead. This is a step towards an implementation of an atomic reference counter for each physical page structure. Reviewed by: alc, dougm, kib MFC after: 1 week Sponsored by: Netflix Differential Revision: https://reviews.freebsd.org/D20758 Notes: svn path=/head/; revision=349432
* Prevent loading SGX with incorrect EPC dataMarcin Wojtas2019-03-191-0/+6
| | | | | | | | | | | | | | | | | It may happen on some machines, that even if SGX is disabled in firmware, the driver would still attach despite EPC base and size equal zero. Such behaviour causes a kernel panic when the module is unloaded. Add a simple check to make sure we only attach when these values are correctly set. Submitted by: Kornel Duleba <mindal@semihalf.com> Reviewed by: br Obtained from: Semihalf Sponsored by: Stormshield Differential Revision: https://reviews.freebsd.org/D19595 Notes: svn path=/head/; revision=345288
* Fix refcount leaks in the SGX Linux compat ioctl handler.Mark Johnston2019-02-171-13/+9
| | | | | | | | | | | | | | | Some argument validation error paths would return without releasing the file reference obtained at the beginning of the function. While here, fix some style bugs and remove trivial debug prints. Reviewed by: kib MFC after: 1 week Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D19214 Notes: svn path=/head/; revision=344232
* Rename assym.s to assym.incEd Maste2018-03-201-1/+1
| | | | | | | | | | | | assym is only to be included by other .s files, and should never actually be assembled by itself. Reviewed by: imp, bdrewery (earlier) Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D14180 Notes: svn path=/head/; revision=331254
* Fix module unload when SGX support is not present in CPU.Ruslan Bukin2017-08-181-3/+6
| | | | | | | Sponsored by: DARPA, AFRL Notes: svn path=/head/; revision=322660
* Rename macro DEBUG to SGX_DEBUG.Ruslan Bukin2017-08-161-3/+3
| | | | | | | | | | This fixes LINT kernel build. Reported by: lwhsu Sponsored by: DARPA, AFRL Notes: svn path=/head/; revision=322578
* Add support for Intel Software Guard Extensions (Intel SGX).Ruslan Bukin2017-08-164-0/+1491
Intel SGX allows to manage isolated compartments "Enclaves" in user VA space. Enclaves memory is part of processor reserved memory (PRM) and always encrypted. This allows to protect user application code and data from upper privilege levels including OS kernel. This includes SGX driver and optional linux ioctl compatibility layer. Intel SGX SDK for FreeBSD is also available. Note this requires support from hardware (available since late Intel Skylake CPUs). Many thanks to Robert Watson for support and Konstantin Belousov for code review. Project wiki: https://wiki.freebsd.org/Intel_SGX. Reviewed by: kib Relnotes: yes Sponsored by: DARPA, AFRL Differential Revision: https://reviews.freebsd.org/D11113 Notes: svn path=/head/; revision=322574
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