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2017-12-18drm/tilcdc: make tilcdc_mode_hvtotal() staticXiongwei Song
The function tilcdc_mode_hvtotal is local to the source and does not need to be in global scope, so make it static. drivers/gpu/drm/tilcdc/tilcdc_crtc.c:297:6: warning: no previous prototype for 'tilcdc_mode_hvtotal' [-Wmissing-prototypes] uint tilcdc_mode_hvtotal(const struct drm_display_mode *mode) Signed-off-by: Xiongwei Song <sxwjean@gmail.com> Signed-off-by: Jyri Sarha <jsarha@ti.com>
2017-12-18Revert "drm/amd/amdgpu: set gtt size according to system memory size only"Andrey Grodzovsky
This reverts commit ba851eed895c76be0eb4260bdbeb7e26f9ccfaa2. With that change piglit max size tests (running with -t max.*size) are causing OOM and hard hang on my CZ with 1GB RAM. Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com> Acked-by: Alex Deucher <alexander.deucher@amd.com> Reviewed-by: Christian König <christian.koenig@amd.com> Reviewed-by: Roger He <Hongbo.He@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-12-18MAINTAINERS: add separate entry for DRM TTM v2Christian König
AMD is the major user of TTM, so it also makes sense that we maintain it. v2: mention Alex git tree as well Signed-off-by: Christian König <christian.koenig@amd.com> Acked-by: Alex Deucher <alexander.deucher@amd.com> Acked-by: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-12-18drm/amdgpu: implement 2+1 PD support for Raven v3Christian König
Instead of falling back to 2 level and very limited address space use 2+1 PD support and 128TB + 512GB of virtual address space. v2: cleanup defines, rebase on top of level enum v3: fix inverted check in hardware setup Signed-off-by: Christian König <christian.koenig@amd.com> Reviewed-and-Tested-by: Chunming Zhou <david1.zhou@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-12-18drm/ttm: cleanup some old definesChristian König
Use pr_debug instead of TTM_DEBUG, fix the lockdep assert and remove the unused constant. Signed-off-by: Christian König <christian.koenig@amd.com> Reviewed-by: Roger He <Hongbo.He@amd.com> Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-12-18drm/ttm: cleanup some more resv->lock usesChristian König
Use the reservation wrapper for this. Signed-off-by: Christian König <christian.koenig@amd.com> Reviewed-by: Roger He <Hongbo.He@amd.com> Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-12-18drm/ttm: use try_lock in ttm_bo_delayed_delete againChristian König
We only need to wait for the contended lock when the reservation object is shared or when we want to remove everything. A trylock should be sufficient in all other cases. Signed-off-by: Christian König <christian.koenig@amd.com> Reviewed-by: Roger He <Hongbo.He@amd.com> Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-12-18drm/amdgpu: restore uvd fence seq in uvd resumeJim Qu
otherwise, uvd block will be never powered up in ring begin_use() callback. uvd ring test will be fail in resume in rumtime pm. Signed-off-by: Jim Qu <Jim.Qu@amd.com> Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-12-18drm/amdgpu: always cancel uvd idle handler in uvd suspendJim Qu
Signed-off-by: Jim Qu <Jim.Qu@amd.com> Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-12-18drm/amdgpu: rename amdgpu_get_pcie_infoAlex Deucher
add device to the name for consistency. Acked-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-12-18drm/amdgpu: move amdgpu_need_backup to amdgpu_object.cAlex Deucher
It's the only place it's used. Acked-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-12-18drm/amdgpu: rename amdgpu_gpu_recoverAlex Deucher
add device to the name for consistency. Acked-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-12-18drm/amdgpu: move dummy page functions to amdgpu_gart.cAlex Deucher
It's the only place they are used. Acked-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-12-18drm/amdgpu: rename amdgpu_need_postAlex Deucher
add device to the name for consistency. Acked-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-12-18drm/amdgpu: rename ip block helper functionsAlex Deucher
add device to the name for consistency. Acked-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-12-18drm/amdgpu: move fw_reserve functions to amdgpu_ttm.cAlex Deucher
It's the only place they are used. Acked-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-12-18drm/amdgpu: rename amdgpu_*_location functionsAlex Deucher
add device to the name for consistency. Acked-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-12-18drm/amdgpu: move amdgpu_doorbell_get_kfd_info to amdgpu_amdkfd.cAlex Deucher
It's the only place it's used. Acked-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-12-18drm/amdgpu: rename amdgpu_pci_config_resetAlex Deucher
add device for consistency with other functions in this file. Acked-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-12-18drm/amdgpu: rename amdgpu_program_register_sequenceAlex Deucher
add device for consistency with other functions in this file. Acked-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-12-18drm/amdgpu: rename amdgpu_wb_* functionsAlex Deucher
add device for consistency. Acked-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-12-18drm/amdgpu: move debugfs functions to their own fileAlex Deucher
amdgpu_device.c was getting pretty cluttered. Acked-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-12-18drm/amdgpu: rename amdgpu_suspend to amdgpu_device_ip_suspendAlex Deucher
for consistency with the other functions in that file. Acked-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-12-18drm/amdgpu: use consistent naming for static funcs in amdgpu_device.cAlex Deucher
Prefix the functions with device or device_ip for functions which deal with ip blocks for consistency. Acked-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-12-18drm/amdgpu: move atom functions from amdgpu_device.cAlex Deucher
and move them to amdgpu_atombios.c for consistency. Acked-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-12-18drm/tilcdc: Remove drm_framebuffer_get() and *_put() callsJyri Sarha
The drm_framebuffer_get() and drm_framebuffer_put() calls in the tilcdc driver are obsolete. The drm atomic modesetting core should take care of holding the references while the atomic state object is in use. The old state is deleted when a commit of a new one is completed after drm_atomic_helper_wait_for_vblanks(). This also fixes an occasional framebuffer leak the old drm_framebuffer_get() and drm_framebuffer_put() code had. Signed-off-by: Jyri Sarha <jsarha@ti.com>
2017-12-18drm/tilcdc: ensure nonatomic iowrite64 is not usedLogan Gunthorpe
Add a check to ensure iowrite64 is only used if it is atomic. It was decided in [1] that the tilcdc driver should not be using an atomic operation (so it was left out of this patchset). However, it turns out that through the drm code, a nonatomic header is actually included: include/linux/io-64-nonatomic-lo-hi.h is included from include/drm/drm_os_linux.h:9:0, from include/drm/drmP.h:74, from include/drm/drm_modeset_helper.h:26, from include/drm/drm_atomic_helper.h:33, from drivers/gpu/drm/tilcdc/tilcdc_crtc.c:19: And thus, without this change, this patchset would inadvertantly change the behaviour of the tilcdc driver. [1] lkml.kernel.org/r/CAK8P3a2HhO_zCnsTzq7hmWSz5La5Thu19FWZpun16iMnyyNreQ@mail.gmail.com Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Cc: Jyri Sarha <jsarha@ti.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Tomi Valkeinen <tomi.valkeinen@ti.com> Cc: David Airlie <airlied@linux.ie> Signed-off-by: Jyri Sarha <jsarha@ti.com>
2017-12-17Linux 4.15-rc4v4.15-rc4Linus Torvalds
2017-12-18Merge tag 'drm-misc-next-2017-12-14' of ↵Dave Airlie
git://anongit.freedesktop.org/drm/drm-misc into drm-next drm-misc-next for 4.16: Cross-subsystem Changes: - Documentation for amlogic dt dt-bindings Core Changes: - Update edid-derived drm_display_info fields at edid property set Driver Changes: - A bunch of clean up from Noralf, including the last patches to reduce fbdev emulation footprint. * tag 'drm-misc-next-2017-12-14' of git://anongit.freedesktop.org/drm/drm-misc: (30 commits) drm/atomic-helper: Make zpos property kerneldoc less misleading drm: Update edid-derived drm_display_info fields at edid property set [v2] MAINTAINERS: Remove Jani as drm-misc co-maintainer drm/tinydrm: Use drm_fb_cma_fbdev_init_with_funcs/fini() drm/arm/mali: Use drm_fb_cma_fbdev_init/fini() drm/zte: Use drm_fb_cma_fbdev_init/fini() drm/vc4: Use drm_fb_cma_fbdev_init/fini() drm/tve200: Use drm_fb_cma_fbdev_init/fini() drm/tilcdc: Use drm_fb_cma_fbdev_init/fini() drm/sun4i: Use drm_fb_cma_fbdev_init/fini() drm/stm: Use drm_fb_cma_fbdev_init/fini() drm/sti: Use drm_fb_cma_fbdev_init/fini() drm/pl111: Use drm_fb_cma_fbdev_init/fini() drm/imx: Use drm_fb_cma_fbdev_init/fini() drm/atmel-hlcdc: Use drm_fb_cma_fbdev_init/fini() drm/cma-helper: Add drm_fb_cma_fbdev_init/fini() drm/gem-fb-helper: drm_gem_fbdev_fb_create() make funcs optional drm/tegra: Use drm_fb_helper_lastclose() and _poll_changed() drm/rockchip: Use drm_fb_helper_lastclose() and _poll_changed() drm/omap: Use drm_fb_helper_lastclose() and _poll_changed() ...
2017-12-17Revert "exec: avoid RLIMIT_STACK races with prlimit()"Kees Cook
This reverts commit 04e35f4495dd560db30c25efca4eecae8ec8c375. SELinux runs with secureexec for all non-"noatsecure" domain transitions, which means lots of processes end up hitting the stack hard-limit change that was introduced in order to fix a race with prlimit(). That race fix will need to be redesigned. Reported-by: Laura Abbott <labbott@redhat.com> Reported-by: Tomáš Trnka <trnka@scm.com> Cc: stable@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-12-17Merge branch 'WIP.x86-pti.base-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull Page Table Isolation (PTI) v4.14 backporting base tree from Ingo Molnar: "This tree contains the v4.14 PTI backport preparatory tree, which consists of four merges of upstream trees and 7 cherry-picked commits, which the upcoming PTI work depends on" NOTE! The resulting tree is exactly the same as the original base tree (ie the diff between this commit and its immediate first parent is empty). The only reason for this merge is literally to have a common point for the actual PTI changes so that the commits can be shared in both the 4.15 and 4.14 trees. * 'WIP.x86-pti.base-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/mm/kasan: Don't use vmemmap_populate() to initialize shadow locking/barriers: Convert users of lockless_dereference() to READ_ONCE() locking/barriers: Add implicit smp_read_barrier_depends() to READ_ONCE() bpf: fix build issues on um due to mising bpf_perf_event.h perf/x86: Enable free running PEBS for REGS_USER/INTR x86: Make X86_BUG_FXSAVE_LEAK detectable in CPUID on AMD x86/cpufeature: Add User-Mode Instruction Prevention definitions
2017-12-17Merge branch 'WIP.x86-pti.base.prep-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull Page Table Isolation (PTI) preparatory tree from Ingo Molnar: "This does a rename to free up linux/pti.h to be used by the upcoming page table isolation feature" * 'WIP.x86-pti.base.prep-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: drivers/misc/intel/pti: Rename the header file to free up the namespace
2017-12-17Merge branch 'timers-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull timer fix from Thomas Gleixner: "A single bugfix which prevents arbitrary sigev_notify values in posix-timers" * 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: posix-timer: Properly check sigevent->sigev_notify
2017-12-17Merge tag 'dmaengine-fix-4.15-rc4' of ↵Linus Torvalds
git://git.infradead.org/users/vkoul/slave-dma Pull dmaengine fixes from Vinod Koul: "This time consisting of fixes in a bunch of drivers and the dmatest module: - Fix for disable clk on error path in fsl-edma driver - Disable clk fail fix in jz4740 driver - Fix long pending bug in dmatest driver for dangling pointer - Fix potential NULL pointer dereference in at_hdmac driver - Error handling path in ioat driver" * tag 'dmaengine-fix-4.15-rc4' of git://git.infradead.org/users/vkoul/slave-dma: dmaengine: fsl-edma: disable clks on all error paths dmaengine: jz4740: disable/unprepare clk if probe fails dmaengine: dmatest: move callback wait queue to thread context dmaengine: at_hdmac: fix potential NULL pointer dereference in atc_prep_dma_interleaved dmaengine: ioat: Fix error handling path
2017-12-17cramfs: fix MTD dependencyArnd Bergmann
With CONFIG_MTD=m and CONFIG_CRAMFS=y, we now get a link failure: fs/cramfs/inode.o: In function `cramfs_mount': inode.c:(.text+0x220): undefined reference to `mount_mtd' fs/cramfs/inode.o: In function `cramfs_mtd_fill_super': inode.c:(.text+0x6d8): undefined reference to `mtd_point' inode.c:(.text+0xae4): undefined reference to `mtd_unpoint' This adds a more specific Kconfig dependency to avoid the broken configuration. Alternatively we could make CRAMFS itself depend on "MTD || !MTD" with a similar result. Fixes: 99c18ce580c6 ("cramfs: direct memory access support") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-12-17Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull vfs fixes from Al Viro: "The alloc_super() one is a regression in this merge window, lazytime thing is older..." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: VFS: Handle lazytime in do_mount() alloc_super(): do ->s_umount initialization earlier
2017-12-17Merge tag 'ext4_for_stable' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 Pull ext4 fixes from Ted Ts'o: "Fix a regression which caused us to fail to interpret symlinks in very ancient ext3 file system images. Also fix two xfstests failures, one of which could cause an OOPS, plus an additional bug fix caught by fuzz testing" * tag 'ext4_for_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: ext4: fix crash when a directory's i_size is too small ext4: add missing error check in __ext4_new_inode() ext4: fix fdatasync(2) after fallocate(2) operation ext4: support fast symlinks from ext3 file systems
2017-12-17x86/mm/kasan: Don't use vmemmap_populate() to initialize shadowAndrey Ryabinin
[ Note, this is a Git cherry-pick of the following commit: d17a1d97dc20: ("x86/mm/kasan: don't use vmemmap_populate() to initialize shadow") ... for easier x86 PTI code testing and back-porting. ] The KASAN shadow is currently mapped using vmemmap_populate() since that provides a semi-convenient way to map pages into init_top_pgt. However, since that no longer zeroes the mapped pages, it is not suitable for KASAN, which requires zeroed shadow memory. Add kasan_populate_shadow() interface and use it instead of vmemmap_populate(). Besides, this allows us to take advantage of gigantic pages and use them to populate the shadow, which should save us some memory wasted on page tables and reduce TLB pressure. Link: http://lkml.kernel.org/r/20171103185147.2688-2-pasha.tatashin@oracle.com Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com> Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Steven Sistare <steven.sistare@oracle.com> Cc: Daniel Jordan <daniel.m.jordan@oracle.com> Cc: Bob Picco <bob.picco@oracle.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Alexander Potapenko <glider@google.com> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: David S. Miller <davem@davemloft.net> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Michal Hocko <mhocko@kernel.org> Cc: Sam Ravnborg <sam@ravnborg.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-12-17locking/barriers: Convert users of lockless_dereference() to READ_ONCE()Will Deacon
[ Note, this is a Git cherry-pick of the following commit: 506458efaf15 ("locking/barriers: Convert users of lockless_dereference() to READ_ONCE()") ... for easier x86 PTI code testing and back-porting. ] READ_ONCE() now has an implicit smp_read_barrier_depends() call, so it can be used instead of lockless_dereference() without any change in semantics. Signed-off-by: Will Deacon <will.deacon@arm.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1508840570-22169-4-git-send-email-will.deacon@arm.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-12-17locking/barriers: Add implicit smp_read_barrier_depends() to READ_ONCE()Will Deacon
[ Note, this is a Git cherry-pick of the following commit: 76ebbe78f739 ("locking/barriers: Add implicit smp_read_barrier_depends() to READ_ONCE()") ... for easier x86 PTI code testing and back-porting. ] In preparation for the removal of lockless_dereference(), which is the same as READ_ONCE() on all architectures other than Alpha, add an implicit smp_read_barrier_depends() to READ_ONCE() so that it can be used to head dependency chains on all architectures. Signed-off-by: Will Deacon <will.deacon@arm.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1508840570-22169-3-git-send-email-will.deacon@arm.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-12-17bpf: fix build issues on um due to mising bpf_perf_event.hDaniel Borkmann
[ Note, this is a Git cherry-pick of the following commit: a23f06f06dbe ("bpf: fix build issues on um due to mising bpf_perf_event.h") ... for easier x86 PTI code testing and back-porting. ] Since c895f6f703ad ("bpf: correct broken uapi for BPF_PROG_TYPE_PERF_EVENT program type") um (uml) won't build on i386 or x86_64: [...] CC init/main.o In file included from ../include/linux/perf_event.h:18:0, from ../include/linux/trace_events.h:10, from ../include/trace/syscall.h:7, from ../include/linux/syscalls.h:82, from ../init/main.c:20: ../include/uapi/linux/bpf_perf_event.h:11:32: fatal error: asm/bpf_perf_event.h: No such file or directory #include <asm/bpf_perf_event.h> [...] Lets add missing bpf_perf_event.h also to um arch. This seems to be the only one still missing. Fixes: c895f6f703ad ("bpf: correct broken uapi for BPF_PROG_TYPE_PERF_EVENT program type") Reported-by: Randy Dunlap <rdunlap@infradead.org> Suggested-by: Richard Weinberger <richard@sigma-star.at> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Tested-by: Randy Dunlap <rdunlap@infradead.org> Cc: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Cc: Richard Weinberger <richard@sigma-star.at> Acked-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Richard Weinberger <richard@nod.at> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-12-17perf/x86: Enable free running PEBS for REGS_USER/INTRAndi Kleen
[ Note, this is a Git cherry-pick of the following commit: a47ba4d77e12 ("perf/x86: Enable free running PEBS for REGS_USER/INTR") ... for easier x86 PTI code testing and back-porting. ] Currently free running PEBS is disabled when user or interrupt registers are requested. Most of the registers are actually available in the PEBS record and can be supported. So we just need to check for the supported registers and then allow it: it is all except for the segment register. For user registers this only works when the counter is limited to ring 3 only, so this also needs to be checked. Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20170831214630.21892-1-andi@firstfloor.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-12-17x86: Make X86_BUG_FXSAVE_LEAK detectable in CPUID on AMDRudolf Marek
[ Note, this is a Git cherry-pick of the following commit: 2b67799bdf25 ("x86: Make X86_BUG_FXSAVE_LEAK detectable in CPUID on AMD") ... for easier x86 PTI code testing and back-porting. ] The latest AMD AMD64 Architecture Programmer's Manual adds a CPUID feature XSaveErPtr (CPUID_Fn80000008_EBX[2]). If this feature is set, the FXSAVE, XSAVE, FXSAVEOPT, XSAVEC, XSAVES / FXRSTOR, XRSTOR, XRSTORS always save/restore error pointers, thus making the X86_BUG_FXSAVE_LEAK workaround obsolete on such CPUs. Signed-Off-By: Rudolf Marek <r.marek@assembler.cz> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Borislav Petkov <bp@suse.de> Tested-by: Borislav Petkov <bp@suse.de> Cc: Andy Lutomirski <luto@amacapital.net> Link: https://lkml.kernel.org/r/bdcebe90-62c5-1f05-083c-eba7f08b2540@assembler.cz Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-12-17x86/cpufeature: Add User-Mode Instruction Prevention definitionsRicardo Neri
[ Note, this is a Git cherry-pick of the following commit: (limited to the cpufeatures.h file) 3522c2a6a4f3 ("x86/cpufeature: Add User-Mode Instruction Prevention definitions") ... for easier x86 PTI code testing and back-porting. ] User-Mode Instruction Prevention is a security feature present in new Intel processors that, when set, prevents the execution of a subset of instructions if such instructions are executed in user mode (CPL > 0). Attempting to execute such instructions causes a general protection exception. The subset of instructions comprises: * SGDT - Store Global Descriptor Table * SIDT - Store Interrupt Descriptor Table * SLDT - Store Local Descriptor Table * SMSW - Store Machine Status Word * STR - Store Task Register This feature is also added to the list of disabled-features to allow a cleaner handling of build-time configuration. Signed-off-by: Ricardo Neri <ricardo.neri-calderon@linux.intel.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Borislav Petkov <bp@suse.de> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Chen Yucong <slaoub@gmail.com> Cc: Chris Metcalf <cmetcalf@mellanox.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang Rui <ray.huang@amd.com> Cc: Jiri Slaby <jslaby@suse.cz> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi V. Shankar <ravi.v.shankar@intel.com> Cc: Shuah Khan <shuah@kernel.org> Cc: Tony Luck <tony.luck@intel.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: ricardo.neri@intel.com Link: http://lkml.kernel.org/r/1509935277-22138-7-git-send-email-ricardo.neri-calderon@linux.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-12-17Merge commit 'upstream-x86-virt' into WIP.x86/mmIngo Molnar
Merge a minimal set of virt cleanups, for a base for the MM isolation patches. Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-12-17Merge branch 'upstream-acpi-fixes' into WIP.x86/pti.baseIngo Molnar
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-12-17Merge branch 'upstream-x86-selftests' into WIP.x86/pti.baseIngo Molnar
Conflicts: arch/x86/kernel/cpu/Makefile Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-12-17Merge commit 'upstream-x86-entry' into WIP.x86/mmIngo Molnar
Pull in a minimal set of v4.15 entry code changes, for a base for the MM isolation patches. Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-12-17drivers/misc/intel/pti: Rename the header file to free up the namespaceIngo Molnar
We'd like to use the 'PTI' acronym for 'Page Table Isolation' - free up the namespace by renaming the <linux/pti.h> driver header to <linux/intel-pti.h>. (Also standardize the header guard name while at it.) Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: J Freyensee <james_p_freyensee@linux.intel.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-12-16Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdmaLinus Torvalds
Pull rdma fixes from Jason Gunthorpe: "More fixes from testing done on the rc kernel, including more SELinux testing. Looking forward, lockdep found regression today in ipoib which is still being fixed. Summary: - Fix for SELinux on the umad SMI path. Some old hardware does not fill the PKey properly exposing another bug in the newer SELinux code. - Check the input port as we can exceed array bounds from this user supplied value - Users are unable to use the hash field support as they want due to incorrect checks on the field restrictions, correct that so the feature works as intended - User triggerable oops in the NETLINK_RDMA handler - cxgb4 driver fix for a bad interaction with CQ flushing in iser caused by patches in this merge window, and bad CQ flushing during normal close. - Unbalanced memalloc_noio in ipoib in an error path" * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma: IB/ipoib: Restore MM behavior in case of tx_ring allocation failure iw_cxgb4: only insert drain cqes if wq is flushed iw_cxgb4: only clear the ARMED bit if a notification is needed RDMA/netlink: Fix general protection fault IB/mlx4: Fix RSS hash fields restrictions IB/core: Don't enforce PKey security on SMI MADs IB/core: Bound check alternate path port number
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