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2016-09-16aio: mark AIO pseudo-fs noexecJann Horn1-1/+6
This ensures that do_mmap() won't implicitly make AIO memory mappings executable if the READ_IMPLIES_EXEC personality flag is set. Such behavior is problematic because the security_mmap_file LSM hook doesn't catch this case, potentially permitting an attacker to bypass a W^X policy enforced by SELinux. I have tested the patch on my machine. To test the behavior, compile and run this: #define _GNU_SOURCE #include <unistd.h> #include <sys/personality.h> #include <linux/aio_abi.h> #include <err.h> #include <stdlib.h> #include <stdio.h> #include <sys/syscall.h> int main(void) { personality(READ_IMPLIES_EXEC); aio_context_t ctx = 0; if (syscall(__NR_io_setup, 1, &ctx)) err(1, "io_setup"); char cmd[1000]; sprintf(cmd, "cat /proc/%d/maps | grep -F '/[aio]'", (int)getpid()); system(cmd); return 0; } In the output, "rw-s" is good, "rwxs" is bad. Signed-off-by: Jann Horn <jann@thejh.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-09-16Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds1-3/+5
Pull kvm fix from Paolo Bonzini: "One fix for an x86 regression in VM migration, mostly visible with Windows because it uses RTC periodic interrupts" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: kvm: x86: correctly reset dest_map->vector when restoring LAPIC state
2016-09-16drm/msm: submit support for out-fencesRob Clark2-1/+28
Signed-off-by: Rob Clark <robdclark@gmail.com>
2016-09-16drm/msm: move fence allocation out of msm_gpu_submit()Rob Clark3-13/+11
Prep work for next patch. Signed-off-by: Rob Clark <robdclark@gmail.com>
2016-09-16drm/msm: submit support for in-fencesRob Clark3-5/+39
Signed-off-by: Rob Clark <robdclark@gmail.com>
2016-09-16drm/msm: extend the submit ioctl to pass in flagsRob Clark2-2/+18
We'll want to be able to pass in flags, such as asking for explicit fencing, and possibly other things down the road. Fortunately we don't need a full 32b for the pipe-id. So use the upper 16 bits for flags (which could be extended or reduced later if needed, so start adding flags from the high bits). Since anything with the upper bits set would not be a valid pipe-id, an old userspace would not set any of the upper bits, and an old kernel would reject it as an invalid pipe-id. Signed-off-by: Rob Clark <robdclark@gmail.com>
2016-09-16drm/msm/mdp5: Set rotation property initial value to DRM_ROTATE_0 insted of 0Ville Syrjälä1-2/+2
0 isn't a valid rotation property value, so let's set the initial value of the property to DRM_ROTATE_0 instead. In the same vein, we must always have at leat one angle as part of set of supported rotation bits, so let's include DRM_ROTATE_0 in there. Cc: Rob Clark <robdclark@gmail.com> Cc: Jilai Wang <jilaiw@codeaurora.org> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Rob Clark <robdclark@gmail.com>
2016-09-16drm/msm/hdmi: don't print error when adding i2c adapter failsWolfram Sang1-4/+1
The core will do this for us now. Signed-off-by: Wolfram Sang <wsa-dev@sang-engineering.com> Signed-off-by: Rob Clark <robdclark@gmail.com>
2016-09-16drm/msm/mdp4: mark symbols static where possibleBaoyou Xie2-2/+2
We get 2 warnings when building kernel with W=1: drivers/gpu/drm/msm/mdp/mdp4/mdp4_lcdc_encoder.c:96:23: warning: no previous prototype for 'get_connector' [-Wmissing-prototypes] drivers/gpu/drm/msm/mdp/mdp4/mdp4_plane.c:84:5: warning: no previous prototype for 'mdp4_plane_set_property' [-Wmissing-prototypes] In fact, these functions are only used in the file in which they are declared and don't need a declaration, but can be made static. So this patch marks these functions with 'static'. Signed-off-by: Baoyou Xie <baoyou.xie@linaro.org> Reviewed-by: Archit Taneja <architt@codeaurora.org> Signed-off-by: Rob Clark <robdclark@gmail.com>
2016-09-16drm/msm: Remove call to reservation_object_test_signaled_rcu before waitChris Wilson1-12/+10
Since fence_wait_timeout_reservation_object_wait_timeout_rcu() with a timeout of 0 becomes reservation_object_test_signaled_rcu(), we do not need to handle such conversion in the caller. The only challenge are those callers that wish to differentiate the error code between the nonblocking busy check and potentially blocking wait. v2: 9 is only 0 in German. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Rob Clark <robdclark@gmail.com> Signed-off-by: Rob Clark <robdclark@gmail.com>
2016-09-15vfs: cap dedupe request structure size at PAGE_SIZEDarrick J. Wong1-0/+4
Kirill A Shutemov reports that the kernel doesn't try to cap dest_count in any way, and uses the number to allocate kernel memory. This causes high order allocation warnings in the kernel log if someone passes in a big enough value. We should clamp the allocation at PAGE_SIZE to avoid stressing the VM. The two existing users of the dedupe ioctl never send more than 120 requests, so we can safely clamp dest_range at PAGE_SIZE, because with 4k pages we can handle up to 127 dedupe candidates. Given the max extent length of 16MB, we can end up doing 2GB of IO which is plenty. [ Note: the "offsetof()" can't overflow, because 'count' is just a 16-bit integer. That's not obvious in the limited context of the patch, so I'm noting it here because it made me go look. - Linus ] Reported-by: "Kirill A. Shutemov" <kirill@shutemov.name> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-09-15vfs: fix return type of ioctl_file_dedupe_rangeDarrick J. Wong1-1/+1
All the VFS functions in the dedupe ioctl path return int status, so the ioctl handler ought to as well. Found by Coverity, CID 1350952. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-09-15Merge branch 'for-linus' of git://git.kernel.dk/linux-blockLinus Torvalds5-75/+90
Pull block fixes from Jens Axboe: "A set of fixes for the current series in the realm of block. Like the previous pull request, the meat of it are fixes for the nvme fabrics/target code. Outside of that, just one fix from Gabriel for not doing a queue suspend if we didn't get the admin queue setup in the first place" * 'for-linus' of git://git.kernel.dk/linux-block: nvme-rdma: add back dependency on CONFIG_BLOCK nvme-rdma: fix null pointer dereference on req->mr nvme-rdma: use ib_client API to detect device removal nvme-rdma: add DELETING queue flag nvme/quirk: Add a delay before checking device ready for memblaze device nvme: Don't suspend admin queue that wasn't created nvme-rdma: destroy nvme queue rdma resources on connect failure nvme_rdma: keep a ref on the ctrl during delete/flush iw_cxgb4: block module unload until all ep resources are released iw_cxgb4: call dev_put() on l2t allocation failure
2016-09-15fix minor infoleak in get_user_ex()Al Viro1-1/+5
get_user_ex(x, ptr) should zero x on failure. It's not a lot of a leak (at most we are leaking uninitialized 64bit value off the kernel stack, and in a fairly constrained situation, at that), but the fix is trivial, so... Cc: stable@vger.kernel.org Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> [ This sat in different branch from the uaccess fixes since mid-August ] Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-09-15drm/msm/hdmi: Clean up HDMI gpio DT bindingsArchit Taneja2-7/+23
Make the following changes in the HDMI gpio bindings: - Use "-gpios" as the suffix for all the gpio names - Move all the gpios to optional, since there are platforms that use none of them. - The HPD gpio is a standard one, remove the "qcom,hdmi-tx-" prefix from it. - Remove the HDMI DDC clk/data gpios. They are just leftovers of an old way to configure pinctrl properties. - Add a missing lpm gpio used on some platforms. Make the necessary changes in the driver to incorporate these changes. There hasn't been any upstream DT that uses the HDMI bindings, so it's okay to change and move around these properties. Cc: Rob Herring <robh@kernel.org> Cc: devicetree@vger.kernel.org Signed-off-by: Archit Taneja <architt@codeaurora.org> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Rob Clark <robdclark@gmail.com>
2016-09-15drm/msm/mdp4: Fix issue with LCDC/LVDS port parsingArchit Taneja1-11/+12
The LVDS port is the first in the list of the output ports in MDP4. The driver assumed that if the port and its corresponding endpoint is defined, then there should be a panel node too. This isn't necessary since boards may not really use a LVDS panel. Don't fail if there isn't a panel node available. While we're at it, use of_graph_get_endpoint_by_regs instead of of_graph_get_next_endpoint to make it more explicit that the LVDS output is at port 0. Tested-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Archit Taneja <architt@codeaurora.org> Signed-off-by: Rob Clark <robdclark@gmail.com>
2016-09-15kvm: x86: correctly reset dest_map->vector when restoring LAPIC statePaolo Bonzini1-3/+5
When userspace sends KVM_SET_LAPIC, KVM schedules a check between the vCPU's IRR and ISR and the IOAPIC redirection table, in order to re-establish the IOAPIC's dest_map (the list of CPUs servicing the real-time clock interrupt with the corresponding vectors). However, __rtc_irq_eoi_tracking_restore_one was forgetting to set dest_map->vectors. Because of this, the IOAPIC did not process the real-time clock interrupt EOI, ioapic->rtc_status.pending_eoi got stuck at a non-zero value, and further RTC interrupts were reported to userspace as coalesced. Fixes: 9e4aabe2bb3454c83dac8139cf9974503ee044db Fixes: 4d99ba898dd0c521ca6cdfdde55c9b58aea3cb3d Cc: stable@vger.kernel.org Cc: Joerg Roedel <jroedel@suse.de> Cc: David Gilbert <dgilbert@redhat.com> Reviewed-by: Radim Krčmář <rkrcmar@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-09-15iwlwifi: mvm: update TX queue before making a copy of the skbBeni Lev1-10/+9
Off-channel action frames (such as ANQP frames) must be sent either on the AUX queue or on the offchannel queue, otherwise the firmware will cause a SYSASSERT. In the current implementation, the queue to be used is correctly set in the original skb, but this is done after it is copied. Thus the copy remains with the original, incorrect queue. Fix this by setting the queue in the original skb before copying it. Fixes: commit 5c08b0f5026f ("iwlwifi: mvm: don't override the rate with the AMSDU len") Cc: stable@vger.kernel.org # v4.6+ Signed-off-by: Beni Lev <beni.lev@intel.com> Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2016-09-15drm: Only use compat ioctl for addfb2 on X86/IA64Kristian H. Kristensen1-0/+4
Similar to struct drm_update_draw, struct drm_mode_fb_cmd2 has an unaligned 64 bit field (modifier). This get packed differently between 32 bit and 64 bit modes on architectures that can handle unaligned 64 bit access (X86 and IA64). Other architectures pack the structs the same and don't need the compat wrapper. Use the same condition for drm_mode_fb_cmd2 as we use for drm_update_draw. Note that only the modifier will be packed differently between compat and non-compat versions. Reviewed-by: Rob Clark <robdclark@gmail.com> Signed-off-by: Kristian H. Kristensen <hoegsberg@chromium.org> [seanpaul added not at bottom of commit msg re: modifier] Signed-off-by: Sean Paul <seanpaul@chromium.org> Link: http://patchwork.freedesktop.org/patch/msgid/1473801645-116011-1-git-send-email-hoegsberg@chromium.org
2016-09-15drm/qxl: squash lines for simple wrapper functionsMasahiro Yamada2-10/+4
Remove unneeded variables and assignments. Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Sean Paul <seanpaul@chromium.org> Link: http://patchwork.freedesktop.org/patch/msgid/1473863952-7658-5-git-send-email-yamada.masahiro@socionext.com
2016-09-15drm/bridge: analogix_dp: squash lines for simple wrapper functionsMasahiro Yamada1-16/+4
Remove unneeded variables and assignments. Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> [seanpaul added analogix prefix to subject] Signed-off-by: Sean Paul <seanpaul@chromium.org> Link: http://patchwork.freedesktop.org/patch/msgid/1473863952-7658-4-git-send-email-yamada.masahiro@socionext.com
2016-09-15drm/radeon: squash lines for simple wrapper functionsMasahiro Yamada3-15/+3
Remove unneeded variables and assignments. Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Sean Paul <seanpaul@chromium.org> Link: http://patchwork.freedesktop.org/patch/msgid/1473863952-7658-3-git-send-email-yamada.masahiro@socionext.com
2016-09-15drm/amdgpu: squash lines for simple wrapper functionsMasahiro Yamada3-15/+3
Remove unneeded variables and assignments. Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Sean Paul <seanpaul@chromium.org> Link: http://patchwork.freedesktop.org/patch/msgid/1473863952-7658-2-git-send-email-yamada.masahiro@socionext.com
2016-09-15drm/etnaviv: mark whole context as lost in recover workerLucas Stach1-1/+1
If we reset the GPU to get it back into a usable state we lose all context, not just the MMU one. Mark the whole context as lost to trigger a restore of the exec and MMU state. Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
2016-09-15drm/etnaviv: record correct cmdbuf IOVA in dumpLucas Stach1-2/+4
For cmdbufs the CPU IOVA was recorded instead of the GPU one. Fix this to make it consistent with other BOs and to make reading the dumps easier. Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
2016-09-15drm/etnaviv: space out IOVA layout for cmdbufs on MMUv2Lucas Stach1-1/+6
At least on the GC3000 the FE MMU is not properly flushing stale TLB entries. Make sure to map the cmdbufs with a big enough spacing in the IOVAs to not hit old/prefetched TLB entries when jumping to a newly mapped cmdbuf. Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
2016-09-15drm/etnaviv: fix up model and revision for GC2000+Lucas Stach1-0/+12
GC2000+ on the i.MX6QP is just a re-branded GC3000, lets call it by its real name to avoid confusion in other parts of the driver. Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
2016-09-15drm/etnaviv: implement IOMMUv2 translationLucas Stach3-4/+260
All other parts are now in place, so implement the actual translation step and hook it up, so the driver claims support for cores with the new MMU. Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
2016-09-15drm/etnaviv: handle MMU exception in IRQ handlerLucas Stach2-4/+20
Bit 30 of the interrupt status signals an MMU exception. Handle this condition properly and dump some useful registers. Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
2016-09-15drm/etnaviv: add flushing logic for MMUv2Lucas Stach1-8/+23
Flushing works differently on MMUv2, in that it's only necessary to set a single bit in the control register to flush all translation units. A semaphore stall then makes sure that the flush has propagated properly. Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
2016-09-15drm/etnaviv: add function to construct MMUv2 init bufferLucas Stach2-0/+35
Both the safe/scratch address and the master TLB address are per pipe with the CPU mapped registers not properly propagating to the different translation units. The only way to correctly configure all translation units is to have a command stream snipped executed by the FE, before any other execution can start. Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
2016-09-15drm/etnaviv: map cmdbuf through MMU on version 2Lucas Stach4-1/+49
With MMUv2 all buffers need to be mapped through the MMU once it is enabled. Align the buffer size to 4K, as the MMU is only able to map page aligned buffers. Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
2016-09-15drm/etnaviv: split out iova search and MMU reaping logicLucas Stach1-25/+37
With MMUv2 the command buffers need to be mapped through the MMU. Split out the iova search and MMU reaping logic so it can be reused for the cmdbuf mapping, where no GEM object is involved. Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
2016-09-15drm/etnaviv: split out FE startLucas Stach2-5/+11
Split out into a new externally visible function, as the IOMMUv2 code needs this functionality, too. Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
2016-09-15drm/etnaviv: split out wait for gpu idleLucas Stach2-18/+23
Split out into a new externally visible function, as the IOMMUv2 code needs this functionality, too. Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
2016-09-15drm/etnaviv: move gpu_va() to etnaviv mmuLucas Stach4-11/+16
The GPU virtual address for the command buffers differs depending on the IOMMU version. Move the calculation of the iova into etnaviv mmu, to enable proper dispatch. Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
2016-09-15drm/etnaviv: remove unused iommu_v2 headerLucas Stach1-25/+0
This has been there from the original merge, but has never been used. Get rid of it. Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
2016-09-15drm/etnaviv: move IOMMU domain allocation into etnaviv MMULucas Stach6-43/+29
The GPU code doesn't need to deal with the IOMMU directly, instead it can all be hidden behind the etnaviv mmu interface. Move the last remaining part into etnaviv mmu. Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
2016-09-15drm/etnaviv: indirect IOMMU restore through etnaviv MMULucas Stach3-1/+11
So we can call the v2 restore code once it is there. Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
2016-09-15drm/etnaviv: move linear window setup into etnaviv_iommuv1_restoreLucas Stach2-8/+8
It is only relevant for the V1 MMU, so we should not do this in the common code. Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
2016-09-15drm/etnaviv: rename etnaviv_iommu_domain_restore to etnaviv_iommuv1_restoreLucas Stach3-6/+5
This function has external visibility and only handles the Vivant IOMMU version 1. Rename to make this more clear and allow a clear separation of the different IOMMU versions. Also drop the domain parameter, as we can infer it from the GPU we are dealing with. Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
2016-09-15drm/etnaviv: only check if the cmdbuf is inside the linear window on MMUv1Lucas Stach1-1/+3
There is no linear window on MMUv2 and the FE can access the full 4GB address space either directly (as long as the MMU isn't configured) or through the MMU, once it is up. Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
2016-09-15drm/etnaviv: only try to use the linear window on MMUv1Lucas Stach1-1/+2
As the comment above the code states, the linear window is only available on MMUv1. Don't try to use it on MMUv2. Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
2016-09-15drm/etnaviv: fold various clock enable/disable functions into top onesLucas Stach1-73/+30
The driver doesn't ever enable individual clocks alone, so there is no need to scatter the clock enable/disable sequences through multiple functions. Fold them into the top one. Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
2016-09-15drm/etnaviv: remove unneeded variable initializationFabio Estevam1-1/+1
There is no need to initialize variable 'err' with 0 because it will be properly assigned later on. Signed-off-by: Fabio Estevam <festevam@gmail.com>
2016-09-15drm/etnaviv: remove unneeded 'fail' labelFabio Estevam1-8/+4
In the etnaviv_gpu_platform_probe() error path the 'fail' label is used to just return the error code. This can be simplified by returning the error code immediately, so get rid of the unneeded 'fail' label. Signed-off-by: Fabio Estevam <festevam@gmail.com>
2016-09-15drm/etnaviv: check for errors when enabling clocksFabio Estevam1-6/+24
clk_prepare_enable() may fail, so we should better check for its return value and propagate it in the case of failure. Signed-off-by: Fabio Estevam <festevam@gmail.com>
2016-09-15[media] rcar-fcp: Make sure rcar_fcp_enable() returns 0 on successGeert Uytterhoeven1-1/+7
When resuming from suspend-to-RAM on r8a7795/salvator-x: dpm_run_callback(): pm_genpd_resume_noirq+0x0/0x90 returns 1 PM: Device fe940000.fdp1 failed to resume noirq: error 1 dpm_run_callback(): pm_genpd_resume_noirq+0x0/0x90 returns 1 PM: Device fe944000.fdp1 failed to resume noirq: error 1 dpm_run_callback(): pm_genpd_resume_noirq+0x0/0x90 returns 1 PM: Device fe948000.fdp1 failed to resume noirq: error 1 According to its documentation, rcar_fcp_enable() returns 0 on success or a negative error code if an error occurs. Hence fdp1_pm_runtime_resume() and vsp1_pm_runtime_resume() forward its return value to their callers. However, rcar_fcp_enable() forwards the return value of pm_runtime_get_sync(), which can actually be 1 on success, leading to the resume failure above. To fix this, consider only negative values returned by pm_runtime_get_sync() to be failures. Fixes: 7b49235e83b2347c ("[media] v4l: Add Renesas R-Car FCP driver") Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2016-09-15drm: Add DP branch device info on debugfsMika Kahola3-0/+90
Read DisplayPort branch device info from through debugfs interface. v2: use drm_dp_helper routines to collect data v3: cleanup to match the drm_dp_helper.c patches introduced earlier in this series v4: move DP branch device info to function 'intel_dp_branch_device_info()' v5: initial step to move debugging info from intel_dp. to drm_dp_helper.c (Daniel) v6: read hw and sw revision without using specific drm_dp_helper routines v7: indentation fixes (Jim Bride) Signed-off-by: Mika Kahola <mika.kahola@intel.com> Reviewed-by: Jim Bride <jim.bride@linux.intel.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1473419458-17080-12-git-send-email-mika.kahola@intel.com
2016-09-15drm/i915: Update bits per component for display infoMika Kahola1-1/+15
DisplayPort branch device may define max supported bits per component. Update display info based on this value if bpc is defined. v2: cleanup to match the drm_dp_helper.c patches introduced earlier in this series v3: Fill bpc for connector's display info in separate drm_dp_helper function (Daniel) v4: remove updating bpc for display info as it may be overridden when parsing EDID. Instead, check bpc for DP branch device during compute_config v5: Indentation fixes (Jim Bride) Signed-off-by: Mika Kahola <mika.kahola@intel.com> Reviewed-by: Jim Bride <jim.bride@linux.intel.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1473419458-17080-11-git-send-email-mika.kahola@intel.com