Some VMA struct fields need to be initialized once the VMA structure is
allocated.
Currently this only concerns anon_vma_chain field but some other will be
added to support the speculative page fault.
Instead of spreading the initialization calls all over the code, let's
introduce a dedicated inline function.
Change-Id: I9f6b29dc74055354318b548e2b6b22c37d4c61bb
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Patch-mainline: linux-mm @ Tue, 17 Apr 2018 16:33:13
[vinmenon@codeaurora.org: trivial merge conflict fixes]
Signed-off-by: Vinayak Menon <vinmenon@codeaurora.org>
[charante@codeaurora.org: merge conflict fixes]
Signed-off-by: Charan Teja Reddy <charante@codeaurora.org>
pte_unmap_same() is making the assumption that the page table are still
around because the mmap_sem is held.
This is no more the case when running a speculative page fault and
additional check must be made to ensure that the final page table are still
there.
This is now done by calling pte_spinlock() to check for the VMA's
consistency while locking for the page tables.
This is requiring passing a vm_fault structure to pte_unmap_same() which is
containing all the needed parameters.
As pte_spinlock() may fail in the case of a speculative page fault, if the
VMA has been touched in our back, pte_unmap_same() should now return 3
cases :
1. pte are the same (0)
2. pte are different (VM_FAULT_PTNOTSAME)
3. a VMA's changes has been detected (VM_FAULT_RETRY)
The case 2 is handled by the introduction of a new VM_FAULT flag named
VM_FAULT_PTNOTSAME which is then trapped in cow_user_page().
If VM_FAULT_RETRY is returned, it is passed up to the callers to retry the
page fault while holding the mmap_sem.
Change-Id: Iaccfa0d877334f4343f8b0ec3400af5070ff5864
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Patch-mainline: linux-mm @ Tue, 17 Apr 2018 16:33:12
[vinmenon@codeaurora.org: trivial merge conflicts]
[vinmenon@codeaurora.org: 5.4: moved PTNOTSAME to mm_types.h]
Signed-off-by: Vinayak Menon <vinmenon@codeaurora.org>
Signed-off-by: Charan Teja Reddy <charante@codeaurora.org>
When handling page fault without holding the mmap_sem the fetch of the
pte lock pointer and the locking will have to be done while ensuring
that the VMA is not touched in our back.
So move the fetch and locking operations in a dedicated function.
Change-Id: If93ab95b1d22b7195e1c15b57315021f6be7c394
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Patch-mainline: linux-mm @ Tue, 17 Apr 2018 16:33:11
Signed-off-by: Vinayak Menon <vinmenon@codeaurora.org>
When speculating faults (without holding mmap_sem) we need to validate
that the vma against which we loaded pages is still valid when we're
ready to install the new PTE.
Therefore, replace the pte_offset_map_lock() calls that (re)take the
PTL with pte_map_lock() which can fail in case we find the VMA changed
since we started the fault.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
[Port to 4.12 kernel]
[Remove the comment about the fault_env structure which has been
implemented as the vm_fault structure in the kernel]
[move pte_map_lock()'s definition upper in the file]
[move the define of FAULT_FLAG_SPECULATIVE later in the series]
[review error path in do_swap_page(), do_anonymous_page() and
wp_page_copy()]
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Change-Id: Id6dfae130fbfdd4bb92aa6415d6f1db7ef833266
[vinmenon@codeaurora.org: fix trivial merge conflicts]
Patch-mainline: linux-mm @ Tue, 17 Apr 2018 16:33:10
Signed-off-by: Vinayak Menon <vinmenon@codeaurora.org>
Signed-off-by: Charan Teja Reddy <charante@codeaurora.org>
This configuration variable will be used to build the code needed to
handle speculative page fault.
By default it is turned off, and activated depending on architecture
support, SMP and MMU.
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Suggested-by: David Rientjes <rientjes@google.com>
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Change-Id: I17123124ec0667a0f0af741a740e5219d278620c
Patch-mainline: linux-mm @ Tue, 17 Apr 2018 16:33:07
[vinmenon@codeaurora.org: disable the feature by default]
Signed-off-by: Vinayak Menon <vinmenon@codeaurora.org>
We need to relocate selinux_state to a separate 4k page
to enable EL2 Hypervisor to monitor changes to this
variable using ARM stage 2 MMU. We will avoid getting
page faults from un-related data as the MMU granularity
is configured to 4k.
Change-Id: I7d0e5c9eae0a2a65ca9db73e85283e164e20c11c
Signed-off-by: Preeti Nagar <pnagar@codeaurora.org>
Add snapshot of qpnp-smb5 charger driver from msm-4.19
as of commit 1bb7bbeb1d09("sched: Fix compilation errors
with !WALT").
Change-Id: Ie7c99bea8887dcb97244e43e7984e2a82d1e5526
Signed-off-by: Jishnu Prakash <jprakash@codeaurora.org>
Check whether size of fd is greater than or equal to
length passed by client. If its not checked here, client
might access unmapped address on dsp.
Change-Id: I4e176f32b0f263e2f7bf648e03b4ca904479527b
Acked-by: Deepika Singh <dsi@qti.qualcomm.com>
Signed-off-by: Mohammed Nayeem Ur Rahman <mohara@codeaurora.org>
Two new fields in the struct vm_fault can't easily be excluded using
CONFIG_SPECULATIVE_PAGE_FAULTS. Add them as padding to reduce the
ABI diff between vendors which use SPECULATIVE_PAGE_FAULTS and ACK. This
allows vendors to pick the SPECULATIVE_PAGE_FAULTS feature and still be
ABI compatible with ACK.
Bug: 153715905
Test: build
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Signed-off-by: Vinayak Menon <vinmenon@codeaurora.org>
Signed-off-by: Charan Teja Reddy <charante@codeaurora.org>
(cherry picked from commit 47e3eb155848872a13ab6ef73a4d0eecac36ce66)
[surenb: kept only struct vm_fault changes and dropped the rest]
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Change-Id: I08dbe38f37fa3e8a0f96f71cb6b2dd8737221da5
Git-commit: a1db93d3a956eae02646e3269f5bb6f3c6fdc7c9
Git-Repo: https://android.googlesource.com/kernel/common/
Signed-off-by: Vinayak Menon <vinmenon@codeaurora.org>
Signed-off-by: Mukesh Ojha <mojha@codeaurora.org>
Add the clock resource ids required to vote from the smd rpm clock
driver.
Change-Id: Ic224d83ea2aacabd26450498b626ebfc687aad04
Signed-off-by: Taniya Das <tdas@codeaurora.org>
Add missing base reference for GPUs to make them consistent
across the list.
Change-Id: Iaaf9ce83fc21d18f5aea573cabe4c99b1454fc76
Signed-off-by: Rajesh Kemisetti <rajeshk@codeaurora.org>
Signed-off-by: Deepak Kumar <dkumar@codeaurora.org>
Update the QCOM whitelist file with additional symbols and
regenerate the snapshot accordingly.
Change-Id: I09c9c91d9d0d1c5bafcb54bd4893f7554c4b8e49
Signed-off-by: Raghavendra Rao Ananta <rananta@codeaurora.org>
As of commit <a5f1397e4b> ("Revert "BACKPORT: tracing: Remove
unnecessary DEBUG_FS dependency""), DEBUG_FS was selected by TRACING.
Remove DEBUG_FS dependency in Tracing kconfig. CONFIG_DEBUG_FS will now
be enabled in QGKI config. Also update the whitelist and abi snapshot.
Change-Id: I8c9e9fb6b97173d6e62f6090712642f18d842888
Signed-off-by: Prakruthi Deepak Heragu <pheragu@codeaurora.org>
Prevent unclocked access if this debugfs parameter is
attempted to be read when USB controller is powered off.
Change-Id: I5a563ea75807d95f0d6d6c5b037db48681d89625
Signed-off-by: Jack Pham <jackp@codeaurora.org>
Ensure that valid memory is allocated for the array of all votables
before an attempt is made to populate it.
Change-Id: I9a0c3e35e345a88560e39d47484348b6c476628d
Signed-off-by: Guru Das Srinagesh <gurus@codeaurora.org>
The allocation code hot-adds the memory from another VM through
the memory hotplug code to create the S1 CPU MMU mappings. The memory
hotplug code can only add memory at a subsection granule, meaning
that all memory requests must be subsection size aligned. Thus,
enforce all allocation requests to be subsection size aligned.
Change-Id: Ia4d3294e36265f0bd956fa42670f2ac8d6974908
Signed-off-by: Isaac J. Manjarres <isaacm@codeaurora.org>
AMOLED ECM (Embedded Current Measurement) driver helps measure
the display current for OLED panels. Enable it.
Change-Id: I94d729dbfa8b46792afd424333a0bf9c106ffef1
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>
Client drivers may lend IRQs with knowledge of only their GPIO interrupt
number, which would not directly have an underlying GIC hwirq. Thus,
tweak RM's understanding of IRQs to be aware of IRQ domains. Now, the
irq backed by GPIO will be translated to GIC domain.
Change-Id: I191d9e072b14f4501f5bbeb5d5263f50e0eef8c1
Signed-off-by: Elliot Berman <eberman@codeaurora.org>
If a biased cpu entered shallowest LPM state and
there are no wakeups for it, can stay in the shallowest
state for long.
Program wakeup for the biased CPU to wakeup after the
expected bias window is completed, so that the cpu can
enter a deeper state.
Change-Id: Ic92c779f0f8b1fa85aa8b3afa68d075f8d5d7dd6
Signed-off-by: Srinivas Rao L <lsrao@codeaurora.org>
Enable TOS and DSCP target support for Holi target
Change-Id: Ib7fbe8442007160f8158f41ba29613fdf1b7fcd1
Signed-off-by: Sharath Chandra Vurukala <sharathv@codeaurora.org>
