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8 years agoarm64: KVM: Use static keys for selecting the GIC backend
Vladimir Murzin [Mon, 12 Sep 2016 14:49:15 +0000 (15:49 +0100)]
arm64: KVM: Use static keys for selecting the GIC backend

Currently GIC backend is selected via alternative framework and this
is fine. We are going to introduce vgic-v3 to 32-bit world and there
we don't have patching framework in hand, so we can either check
support for GICv3 every time we need to choose which backend to use or
try to optimise it by using static keys. The later looks quite
promising because we can share logic involved in selecting GIC backend
between architectures if both uses static keys.

This patch moves arm64 from alternative to static keys framework for
selecting GIC backend. For that we embed static key into vgic_global
and enable the key during vgic initialisation based on what has
already been exposed by the host GIC driver.

Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoKVM: ARM: cleanup kvm_timer_hyp_init
Paolo Bonzini [Thu, 8 Sep 2016 10:45:59 +0000 (12:45 +0200)]
KVM: ARM: cleanup kvm_timer_hyp_init

Remove two unnecessary labels now that kvm_timer_hyp_init is not
creating its own workqueue anymore.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoarm64: KVM: Inject a vSerror if detecting a bad GICV access at EL2
Marc Zyngier [Tue, 6 Sep 2016 13:02:17 +0000 (14:02 +0100)]
arm64: KVM: Inject a vSerror if detecting a bad GICV access at EL2

If, when proxying a GICV access at EL2, we detect that the guest is
doing something silly, report an EL1 SError instead ofgnoring the
access.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoarm/arm64: KVM: Remove external abort test from MMIO handling
Marc Zyngier [Tue, 6 Sep 2016 13:02:16 +0000 (14:02 +0100)]
arm/arm64: KVM: Remove external abort test from MMIO handling

As we know handle external aborts pretty early, we can get rid of
its handling in the MMIO code (which was a bit odd to begin with...).

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoarm/arm64: KVM: Inject virtual abort when guest exits on external abort
Marc Zyngier [Tue, 6 Sep 2016 13:02:15 +0000 (14:02 +0100)]
arm/arm64: KVM: Inject virtual abort when guest exits on external abort

If we spot a data abort bearing the ESR_EL2.EA bit set, we know that
this is an external abort, and that should be punished by the injection
of an abort.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoarm: KVM: Drop unreachable HYP abort handlers
Marc Zyngier [Tue, 6 Sep 2016 13:02:14 +0000 (14:02 +0100)]
arm: KVM: Drop unreachable HYP abort handlers

Both data and prefetch aborts occuring in HYP lead to a well
deserved panic. Let's get rid of these silly handlers.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoarm: KVM: Inject a Virtual Abort if it was pending
Marc Zyngier [Tue, 6 Sep 2016 13:02:13 +0000 (14:02 +0100)]
arm: KVM: Inject a Virtual Abort if it was pending

If we have caught an Abort whilst exiting, we've tagged the
exit code with the pending information. In that case, let's
re-inject the error into the guest, after having adjusted
the PC if required.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoarm: KVM: Handle async aborts delivered while at HYP
Marc Zyngier [Tue, 6 Sep 2016 13:02:12 +0000 (14:02 +0100)]
arm: KVM: Handle async aborts delivered while at HYP

Just like for arm64, we can handle asynchronous aborts being
delivered at HYP while being caused by the guest. We use
the exact same method to catch such an abort, and soldier on.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoarm: KVM: Allow an exit code to be tagged with a Virtual Abort
Marc Zyngier [Tue, 6 Sep 2016 13:02:11 +0000 (14:02 +0100)]
arm: KVM: Allow an exit code to be tagged with a Virtual Abort

An asynchronous abort can also be triggered whilst running at EL2.
But instead of making that a new error code, we need to communicate
it to the rest of KVM together with the exit reason.
So let's hijack a single bit that allows the exception code to be
tagged with a "pending Abort" information.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoarm: KVM: Add HYP async abort handler
Marc Zyngier [Tue, 6 Sep 2016 13:02:10 +0000 (14:02 +0100)]
arm: KVM: Add HYP async abort handler

If we've exited the guest because it has triggered an asynchronous
abort, a possible course of action is to let it know it screwed up
by giving it a Virtual Abort to chew on.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoarm: KVM: Add Virtual Abort injection helper
Marc Zyngier [Tue, 6 Sep 2016 13:02:09 +0000 (14:02 +0100)]
arm: KVM: Add Virtual Abort injection helper

Now that we're able to context switch the HCR.VA bit, let's
introduce a helper that injects an Abort into a vcpu.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoarm: KVM: Preserve pending Virtual Abort in world switch
Marc Zyngier [Tue, 6 Sep 2016 13:02:08 +0000 (14:02 +0100)]
arm: KVM: Preserve pending Virtual Abort in world switch

The HCR.VA bit is used to signal an Abort to a guest, and has
the peculiar feature of getting cleared when the guest has taken
the abort (this is the only bit that behaves as such in this register).

This means that if we signal such an abort, we must leave it in
the guest context until it disappears from HCR, and at which point
it must be cleared from the context.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoarm64: KVM: Handle async aborts delivered while at EL2
Marc Zyngier [Tue, 6 Sep 2016 13:02:07 +0000 (14:02 +0100)]
arm64: KVM: Handle async aborts delivered while at EL2

If EL1 generates an asynchronous abort and then traps into EL2
before the abort has been delivered, we may end-up with the
abort firing at the worse possible place: on the host.

In order to avoid this, it is necessary to take the abort at EL2,
by clearing the PSTATE.A bit. In order to survive this abort,
we do it at a point where we're in a known state with respect
to the world switch, and handle the resulting exception,
overloading the exit code in the process.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoarm64: KVM: Inject a Virtual SError if it was pending
Marc Zyngier [Tue, 6 Sep 2016 13:02:06 +0000 (14:02 +0100)]
arm64: KVM: Inject a Virtual SError if it was pending

If we have caught an SError whilst exiting, we've tagged the
exit code with the pending information. In that case, let's
re-inject the error into the guest, after having adjusted
the PC if required.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoarm64: KVM: Allow an exit code to be tagged with an SError
Marc Zyngier [Tue, 6 Sep 2016 13:02:05 +0000 (14:02 +0100)]
arm64: KVM: Allow an exit code to be tagged with an SError

Similarily to EL1, an asynchronous abort can be triggered whilst
running at EL2. But instead of making that a new error code,
we need to communicate it to the rest of KVM together with
the exit reason. So let's hijack a single bit that allows the
exception code to be tagged with a "pending SError" information.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoarm64: KVM: Route asynchronous aborts
Marc Zyngier [Tue, 6 Sep 2016 13:02:04 +0000 (14:02 +0100)]
arm64: KVM: Route asynchronous aborts

As we now have some basic handling to EL1-triggered aborts, we can
actually report them to KVM.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoarm64: KVM: Add EL1 async abort handler
Marc Zyngier [Tue, 6 Sep 2016 13:02:03 +0000 (14:02 +0100)]
arm64: KVM: Add EL1 async abort handler

If we've exited the guest because it has triggered an asynchronous
abort from EL1, a possible course of action is to let it know it
screwed up by giving it a Virtual Abort to chew on.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoarm64: KVM: Add exception code to report EL1 asynchronous aborts
Marc Zyngier [Tue, 6 Sep 2016 13:02:02 +0000 (14:02 +0100)]
arm64: KVM: Add exception code to report EL1 asynchronous aborts

So far, we don't have a code to indicate that we've taken an
asynchronous abort from EL1. Let's add one.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoarm64: KVM: Add Virtual Abort injection helper
Marc Zyngier [Tue, 6 Sep 2016 13:02:01 +0000 (14:02 +0100)]
arm64: KVM: Add Virtual Abort injection helper

Now that we're able to context switch the HCR_EL2.VA bit, let's
introduce a helper that injects an Abort into a vcpu.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoarm64: KVM: Preserve pending vSError in world switch
Marc Zyngier [Tue, 6 Sep 2016 13:02:00 +0000 (14:02 +0100)]
arm64: KVM: Preserve pending vSError in world switch

The HCR_EL2.VSE bit is used to signal an SError to a guest, and has
the peculiar feature of getting cleared when the guest has taken
the abort (this is the only bit that behaves as such in this register).

This means that if we signal such an abort, we must leave it
in the guest context until it disappears from HCR_EL2, and at which
point it must be cleared from the context. This is achieved by
reading back from HCR_EL2 until the guest takes the fault.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoarm64: KVM: Rename HCR_VA to HCR_VSE
Marc Zyngier [Tue, 6 Sep 2016 13:01:59 +0000 (14:01 +0100)]
arm64: KVM: Rename HCR_VA to HCR_VSE

HCR_VA is a leftover from ARMv7, On ARMv8, this is HCR_VSE
(which stands for Virtual System Error), and has better
defined semantics.

Let's rename the constant.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoarm64: KVM: vgic-v2: Enable GICV access from HYP if access from guest is unsafe
Marc Zyngier [Tue, 6 Sep 2016 08:28:47 +0000 (09:28 +0100)]
arm64: KVM: vgic-v2: Enable GICV access from HYP if access from guest is unsafe

So far, we've been disabling KVM on systems where the GICV region couldn't
be safely given to a guest. Now that we're able to handle this access
safely by emulating it in HYP, we can enable this feature when we detect
an unsafe configuration.

Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoarm64: KVM: vgic-v2: Add GICV access from HYP
Marc Zyngier [Tue, 6 Sep 2016 08:28:46 +0000 (09:28 +0100)]
arm64: KVM: vgic-v2: Add GICV access from HYP

Now that we have the necessary infrastructure to handle MMIO accesses
in HYP, perform the GICV access on behalf of the guest. This requires
checking that the access is strictly 32bit, properly aligned, and
falls within the expected range.

When all condition are satisfied, we perform the access and tell
the rest of the HYP code that the instruction has been correctly
emulated.

Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoarm64: KVM: vgic-v2: Add the GICV emulation infrastructure
Marc Zyngier [Tue, 6 Sep 2016 08:28:45 +0000 (09:28 +0100)]
arm64: KVM: vgic-v2: Add the GICV emulation infrastructure

In order to efficiently perform the GICV access on behalf of the
guest, we need to be able to avoid going back all the way to
the host kernel.

For this, we introduce a new hook in the world switch code,
conveniently placed just after populating the fault info.
At that point, we only have saved/restored the GP registers,
and we can quickly perform all the required checks (data abort,
translation fault, valid faulting syndrome, not an external
abort, not a PTW).

Coming back from the emulation code, we need to skip the emulated
instruction. This involves an additional bit of save/restore in
order to be able to access the guest's PC (and possibly CPSR if
this is a 32bit guest).

At this stage, no emulation code is provided.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoarm64: KVM: Make kvm_skip_instr32 available to HYP
Marc Zyngier [Tue, 6 Sep 2016 08:28:44 +0000 (09:28 +0100)]
arm64: KVM: Make kvm_skip_instr32 available to HYP

As we plan to do some emulation at HYP, let's make kvm_skip_instr32
as part of the hyp_text section. This doesn't preclude the kernel
from using it.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoarm: KVM: Use common AArch32 conditional execution code
Marc Zyngier [Tue, 6 Sep 2016 08:28:43 +0000 (09:28 +0100)]
arm: KVM: Use common AArch32 conditional execution code

Add the bit of glue and const-ification that is required to use
the code inherited from the arm64 port, and move over to it.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoarm64: KVM: Move the AArch32 conditional execution to common code
Marc Zyngier [Tue, 6 Sep 2016 08:28:42 +0000 (09:28 +0100)]
arm64: KVM: Move the AArch32 conditional execution to common code

It would make some sense to share the conditional execution code
between 32 and 64bit. In order to achieve this, let's move that
code to virt/kvm/arm/aarch32.c. While we're at it, drop a
superfluous BUG_ON() that wasn't that useful.

Following patches will migrate the 32bit port to that code base.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoarm64: KVM: Move kvm_vcpu_get_condition out of emulate.c
Marc Zyngier [Tue, 6 Sep 2016 08:28:41 +0000 (09:28 +0100)]
arm64: KVM: Move kvm_vcpu_get_condition out of emulate.c

In order to make emulate.c more generic, move the arch-specific
manupulation bits out of emulate.c.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoarm64: KVM: VHE: reset PSTATE.PAN on entry to EL2
Vladimir Murzin [Thu, 1 Sep 2016 14:29:03 +0000 (15:29 +0100)]
arm64: KVM: VHE: reset PSTATE.PAN on entry to EL2

SCTLR_EL2.SPAN bit controls what happens with the PSTATE.PAN bit on an
exception. However, this bit has no effect on the PSTATE.PAN when
HCR_EL2.E2H or HCR_EL2.TGE is unset. Thus when VHE is used and
exception taken from a guest PSTATE.PAN bit left unchanged and we
continue with a value guest has set.

To address that always reset PSTATE.PAN on entry from EL1.

Fixes: 1f364c8c48a0 ("arm64: VHE: Add support for running Linux in EL2 mode")
Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Reviewed-by: James Morse <james.morse@arm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: <stable@vger.kernel.org> # v4.6+
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoKVM: arm/arm64: Get rid of exported aliases to static functions
Christoffer Dall [Thu, 1 Sep 2016 11:16:03 +0000 (13:16 +0200)]
KVM: arm/arm64: Get rid of exported aliases to static functions

When rewriting the assembly code to C code, it was useful to have
exported aliases or static functions so that we could keep the existing
common C code unmodified and at the same time rewrite arm64 from
assembly to C code, and later do the arm part.

Now when both are done, we really don't need this level of indirection
anymore, and it's time to save a few lines and brain cells.

Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoarm64/kvm: remove unused stub functions
Mark Rutland [Tue, 30 Aug 2016 16:05:56 +0000 (17:05 +0100)]
arm64/kvm: remove unused stub functions

Now that 32-bit KVM no longer performs cache maintenance for page table
updates, we no longer need empty stubs for arm64. Remove them.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Christoffer Dall <christoffer.dall@linaro.org>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: kvmarm@lists.cs.columbia.edu
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoarm/kvm: excise redundant cache maintenance
Mark Rutland [Tue, 30 Aug 2016 16:05:55 +0000 (17:05 +0100)]
arm/kvm: excise redundant cache maintenance

When modifying Stage-2 page tables, we perform cache maintenance to
account for non-coherent page table walks. However, this is unnecessary,
as page table walks are guaranteed to be coherent in the presence of the
virtualization extensions.

Per ARM DDI 0406C.c, section B1.7 ("The Virtualization Extensions"), the
virtualization extensions mandate the multiprocessing extensions.

Per ARM DDI 0406C.c, section B3.10.1 ("General TLB maintenance
requirements"), as described in the sub-section titled "TLB maintenance
operations and the memory order model", this maintenance is not required
in the presence of the multiprocessing extensions.

Hence, we need not perform this cache maintenance when modifying Stage-2
entries.

This patch removes the logic for performing the redundant maintenance.
To ensure visibility and ordering of updates, a dsb(ishst) that was
otherwise implicit in the maintenance is folded into kvm_set_pmd() and
kvm_set_pte().

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Christoffer Dall <christoffer.dall@linaro.org>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: kvmarm@lists.cs.columbia.edu
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoKVM: arm: vgic: Drop build compatibility hack for older kernel versions
Marc Zyngier [Tue, 30 Aug 2016 17:54:19 +0000 (18:54 +0100)]
KVM: arm: vgic: Drop build compatibility hack for older kernel versions

As kvm_set_routing_entry() was changing prototype between 4.7 and 4.8,
an ugly hack was put in place in order to survive both building in
-next and the merge window.

Now that everything has been merged, let's dump the compatibility
hack for good.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoarm64: KVM: Optimize __guest_enter/exit() to save a few instructions
Shanker Donthineni [Wed, 31 Aug 2016 02:08:32 +0000 (21:08 -0500)]
arm64: KVM: Optimize __guest_enter/exit() to save a few instructions

We are doing an unnecessary stack push/pop operation when restoring
the guest registers x0-x18 in __guest_enter(). This patch saves the
two instructions by using x18 as a base register. No need to store
the vcpu context pointer in stack because it is redundant, the same
information is available in tpidr_el2. The function __guest_exit()
calling convention is slightly modified, caller only pushes the regs
x0-x1 to stack instead of regs x0-x3.

Signed-off-by: Shanker Donthineni <shankerd@codeaurora.org>
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoKVM: arm/arm64: Rename vgic_attr_regs_access to vgic_attr_regs_access_v2
Christoffer Dall [Tue, 16 Aug 2016 14:52:14 +0000 (16:52 +0200)]
KVM: arm/arm64: Rename vgic_attr_regs_access to vgic_attr_regs_access_v2

Just a rename so we can implement a v3-specific function later.

We take the chance to get rid of the V2/V3 ops comments as well.

No functional change.

Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
8 years agoKVM: arm/arm64: Factor out vgic_attr_regs_access functionality
Christoffer Dall [Tue, 16 Aug 2016 14:48:20 +0000 (16:48 +0200)]
KVM: arm/arm64: Factor out vgic_attr_regs_access functionality

As we are about to deal with multiple data types and situations where
the vgic should not be initialized when doing userspace accesses on the
register attributes, factor out the functionality of
vgic_attr_regs_access into smaller bits which can be reused by a new
function later.

Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
8 years agoKVM: arm/arm64: Add VGICv3 save/restore API documentation
Christoffer Dall [Fri, 13 May 2016 14:41:41 +0000 (16:41 +0200)]
KVM: arm/arm64: Add VGICv3 save/restore API documentation

Factor out the GICv3 and ITS-specific documentation into a separate
documentation file.  Add description for how to access distributor,
redistributor, and CPU interface registers for GICv3 in this new file,
and add a group for accessing level triggered IRQ information for GICv3
as well.

Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoKVM: nVMX: expose INS/OUTS information support
Jan Dakinevich [Sun, 4 Sep 2016 18:23:15 +0000 (21:23 +0300)]
KVM: nVMX: expose INS/OUTS information support

Expose the feature to L1 hypervisor if host CPU supports it, since
certain hypervisors requires it for own purposes.

According to Intel SDM A.1, if CPU supports the feature,
VMX_INSTRUCTION_INFO field of VMCS will contain detailed information
about INS/OUTS instructions handling. This field is already copied to
VMCS12 for L1 hypervisor (see prepare_vmcs12 routine) independently
feature presence.

Signed-off-by: Jan Dakinevich <jan.dakinevich@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
8 years agoKVM: VMX: not use vmcs_config in setup_vmcs_config
Paolo Bonzini [Mon, 5 Sep 2016 13:57:00 +0000 (15:57 +0200)]
KVM: VMX: not use vmcs_config in setup_vmcs_config

setup_vmcs_config takes a pointer to the vmcs_config global.  The
indirection is somewhat pointless, but just keep things consistent
for now.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
8 years agoKVM: x86: remove stale comments
Paolo Bonzini [Fri, 19 Aug 2016 15:51:29 +0000 (17:51 +0200)]
KVM: x86: remove stale comments

handle_external_intr does not enable interrupts anymore, vcpu_enter_guest
does it after calling guest_exit_irqoff.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
8 years agoKVM: x86: ratelimit and decrease severity for guest-triggered printk
Paolo Bonzini [Fri, 19 Aug 2016 15:51:20 +0000 (17:51 +0200)]
KVM: x86: ratelimit and decrease severity for guest-triggered printk

These are mostly related to nested VMX.  They needn't have
a loglevel as high as KERN_WARN, and mustn't be allowed to
pollute the host logs.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
8 years agoKVM: nVMX: pass valid guest linear-address to the L1
Jan Dakinevich [Sun, 4 Sep 2016 18:22:47 +0000 (21:22 +0300)]
KVM: nVMX: pass valid guest linear-address to the L1

If EPT support is exposed to L1 hypervisor, guest linear-address field
of VMCS should contain GVA of L2, the access to which caused EPT violation.

Signed-off-by: Jan Dakinevich <jan.dakinevich@gmail.com>
Reviewed-by: Wanpeng Li <wanpeng.li@hotmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
8 years agoKVM: Remove deprecated create_singlethread_workqueue
Bhaktipriya Shridhar [Tue, 30 Aug 2016 17:59:51 +0000 (23:29 +0530)]
KVM: Remove deprecated create_singlethread_workqueue

The workqueue "irqfd_cleanup_wq" queues a single work item
&irqfd->shutdown and hence doesn't require ordering. It is a host-wide
workqueue for issuing deferred shutdown requests aggregated from all
vm* instances. It is not being used on a memory reclaim path.
Hence, it has been converted to use system_wq.
The work item has been flushed in kvm_irqfd_release().

The workqueue "wqueue" queues a single work item &timer->expired
and hence doesn't require ordering. Also, it is not being used on
a memory reclaim path. Hence, it has been converted to use system_wq.

System workqueues have been able to handle high level of concurrency
for a long time now and hence it's not required to have a singlethreaded
workqueue just to gain concurrency. Unlike a dedicated per-cpu workqueue
created with create_singlethread_workqueue(), system_wq allows multiple
work items to overlap executions even on the same CPU; however, a
per-cpu workqueue doesn't have any CPU locality or global ordering
guarantee unless the target CPU is explicitly specified and thus the
increase of local concurrency shouldn't make any difference.

Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
8 years agoKVM: nVMX: make emulated nested preemption timer pinned
Wanpeng Li [Tue, 30 Aug 2016 08:14:01 +0000 (16:14 +0800)]
KVM: nVMX: make emulated nested preemption timer pinned

Commit 61abdbe0bc ("kvm: x86: make lapic hrtimer pinned") pins the emulated
lapic timer. This patch does the same for the emulated nested preemption
timer to avoid vmexit an unrelated vCPU and the latency of kicking IPI to
another vCPU.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Yunhong Jiang <yunhong.jiang@intel.com>
Signed-off-by: Wanpeng Li <wanpeng.li@hotmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
8 years agovmx: refine validity check for guest linear address
Liang Li [Thu, 18 Aug 2016 07:49:19 +0000 (15:49 +0800)]
vmx: refine validity check for guest linear address

The validity check for the guest line address is inefficient,
check the invalid value instead of enumerating the valid ones.

Signed-off-by: Liang Li <liang.z.li@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
8 years agoMerge branch 'x86/amd-avic' of git://git.kernel.org/pub/scm/linux/kernel/git/joro...
Paolo Bonzini [Mon, 5 Sep 2016 14:00:24 +0000 (16:00 +0200)]
Merge branch 'x86/amd-avic' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu into HEAD

Merge IOMMU bits for virtualization of interrupt injection into
virtual machines.

8 years agoiommu/amd: Enable vAPIC interrupt remapping mode by default
Suravee Suthikulpanit [Tue, 23 Aug 2016 18:52:40 +0000 (13:52 -0500)]
iommu/amd: Enable vAPIC interrupt remapping mode by default

Introduce struct iommu_dev_data.use_vapic flag, which IOMMU driver
uses to determine if it should enable vAPIC support, by setting
the ga_mode bit in the device's interrupt remapping table entry.

Currently, it is enabled for all pass-through device if vAPIC mode
is enabled.

Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
8 years agoiommu/amd: Implements irq_set_vcpu_affinity() hook to setup vapic mode for pass-throu...
Suravee Suthikulpanit [Tue, 23 Aug 2016 18:52:39 +0000 (13:52 -0500)]
iommu/amd: Implements irq_set_vcpu_affinity() hook to setup vapic mode for pass-through devices

This patch implements irq_set_vcpu_affinity() function to set up interrupt
remapping table entry with vapic mode for pass-through devices.

In case requirements for vapic mode are not met, it falls back to set up
the IRTE in legacy mode.

Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
8 years agoiommu/amd: Introduce amd_iommu_update_ga()
Suravee Suthikulpanit [Tue, 23 Aug 2016 18:52:38 +0000 (13:52 -0500)]
iommu/amd: Introduce amd_iommu_update_ga()

Introduces a new IOMMU API, amd_iommu_update_ga(), which allows
KVM (SVM) to update existing posted interrupt IOMMU IRTE when
load/unload vcpu.

Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
8 years agoiommu/amd: Adding GALOG interrupt handler
Suravee Suthikulpanit [Tue, 23 Aug 2016 18:52:37 +0000 (13:52 -0500)]
iommu/amd: Adding GALOG interrupt handler

This patch adds AMD IOMMU guest virtual APIC log (GALOG) handler.
When IOMMU hardware receives an interrupt targeting a blocking vcpu,
it creates an entry in the GALOG, and generates an interrupt to notify
the AMD IOMMU driver.

At this point, the driver processes the log entry, and notify the SVM
driver via the registered iommu_ga_log_notifier function.

Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
8 years agoiommu/amd: Detect and initialize guest vAPIC log
Suravee Suthikulpanit [Tue, 23 Aug 2016 18:52:36 +0000 (13:52 -0500)]
iommu/amd: Detect and initialize guest vAPIC log

This patch adds support to detect and initialize IOMMU Guest vAPIC log
(GALOG). By default, it also enable GALog interrupt to notify IOMMU driver
when GA Log entry is created.

Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
8 years agoiommu/amd: Add support for multiple IRTE formats
Suravee Suthikulpanit [Tue, 23 Aug 2016 18:52:35 +0000 (13:52 -0500)]
iommu/amd: Add support for multiple IRTE formats

This patch enables support for the new 128-bit IOMMU IRTE format,
which can be used for both legacy and vapic interrupt remapping modes.
It replaces the existing operations on IRTE, which can only support
the older 32-bit IRTE format, with calls to the new struct amd_irt_ops.

It also provides helper functions for setting up, accessing, and
updating interrupt remapping table entries in different mode.

Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
8 years agoiommu/amd: Introduce interrupt remapping ops structure
Suravee Suthikulpanit [Tue, 23 Aug 2016 18:52:34 +0000 (13:52 -0500)]
iommu/amd: Introduce interrupt remapping ops structure

Currently, IOMMU support two interrupt remapping table entry formats,
32-bit (legacy) and 128-bit (GA). The spec also implies that it might
support additional modes/formats in the future.

So, this patch introduces the new struct amd_irte_ops, which allows
the same code to work with different irte formats by providing hooks
for various operations on an interrupt remapping table entry.

Suggested-by: Joerg Roedel <joro@8bytes.org>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
8 years agoiommu/amd: Move and introduce new IRTE-related unions and structures
Suravee Suthikulpanit [Tue, 23 Aug 2016 18:52:33 +0000 (13:52 -0500)]
iommu/amd: Move and introduce new IRTE-related unions and structures

Move existing unions and structs for accessing/managing IRTE to a proper
header file. This is mainly to simplify variable declarations in subsequent
patches.

Besides, this patch also introduces new struct irte_ga for the new
128-bit IRTE format.

Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
8 years agoiommu/amd: Detect and enable guest vAPIC support
Suravee Suthikulpanit [Tue, 23 Aug 2016 18:52:32 +0000 (13:52 -0500)]
iommu/amd: Detect and enable guest vAPIC support

This patch introduces a new IOMMU driver parameter, amd_iommu_guest_ir,
which can be used to specify different interrupt remapping mode for
passthrough devices to VM guest:
    * legacy: Legacy interrupt remapping (w/ 32-bit IRTE)
    * vapic : Guest vAPIC interrupt remapping (w/ GA mode 128-bit IRTE)

Note that in vapic mode, it can also supports legacy interrupt remapping
for non-passthrough devices with the 128-bit IRTE.

Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
8 years agoKVM: x86: Expose more Intel AVX512 feature to guest
Luwei Kang [Tue, 2 Aug 2016 08:01:18 +0000 (16:01 +0800)]
KVM: x86: Expose more Intel AVX512 feature to guest

Expose AVX512DQ, AVX512BW, AVX512VL feature to guest.
Its spec can be found at:
https://software.intel.com/sites/default/files/managed/b4/3a/319433-024.pdf

Signed-off-by: Luwei Kang <luwei.kang@intel.com>
[Resolved a trivial conflict with removed F(PCOMMIT).]
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
8 years agommu: don't pass *kvm to spte_write_protect and spte_*_dirty
Bandan Das [Tue, 2 Aug 2016 20:32:37 +0000 (16:32 -0400)]
mmu: don't pass *kvm to spte_write_protect and spte_*_dirty

That parameter isn't used in these functions,
it's probably a historical artifact.

Signed-off-by: Bandan Das <bsd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
8 years agoKVM: lapic: don't recalculate apic map table twice when enabling LAPIC
Wanpeng Li [Wed, 3 Aug 2016 04:04:13 +0000 (12:04 +0800)]
KVM: lapic: don't recalculate apic map table twice when enabling LAPIC

APIC map table is recalculated during reset APIC ID to the initial value
when enabling LAPIC. This patch move the recalculate_apic_map() to the
next branch since we don't need to recalculate apic map twice in current
codes.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Wanpeng Li <wanpeng.li@hotmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
8 years agoMIPS: KVM: Check for pfn noslot case
James Hogan [Fri, 19 Aug 2016 13:30:29 +0000 (14:30 +0100)]
MIPS: KVM: Check for pfn noslot case

When mapping a page into the guest we error check using is_error_pfn(),
however this doesn't detect a value of KVM_PFN_NOSLOT, indicating an
error HVA for the page. This can only happen on MIPS right now due to
unusual memslot management (e.g. being moved / removed / resized), or
with an Enhanced Virtual Memory (EVA) configuration where the default
KVM_HVA_ERR_* and kvm_is_error_hva() definitions are unsuitable (fixed
in a later patch). This case will be treated as a pfn of zero, mapping
the first page of physical memory into the guest.

It would appear the MIPS KVM port wasn't updated prior to being merged
(in v3.10) to take commit 81c52c56e2b4 ("KVM: do not treat noslot pfn as
a error pfn") into account (merged v3.8), which converted a bunch of
is_error_pfn() calls to is_error_noslot_pfn(). Switch to using
is_error_noslot_pfn() instead to catch this case properly.

Fixes: 858dd5d45733 ("KVM/MIPS32: MMU/TLB operations for the Guest.")
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Cc: <stable@vger.kernel.org> # 3.10.y-
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
8 years agoMerge tag 'kvm-arm-for-v4.8-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git...
Paolo Bonzini [Thu, 18 Aug 2016 10:19:19 +0000 (12:19 +0200)]
Merge tag 'kvm-arm-for-v4.8-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

KVM/ARM Fixes for v4.8-rc3

This tag contains the following fixes on top of v4.8-rc1:
 - ITS init issues
 - ITS error handling issues
 - ITS IRQ leakage fix
 - Plug a couple of ITS race conditions
 - An erratum workaround for timers
 - Some removal of misleading use of errors and comments
 - A fix for GICv3 on 32-bit guests

8 years agokvm: nVMX: fix nested tsc scaling
Peter Feiner [Wed, 17 Aug 2016 16:36:47 +0000 (09:36 -0700)]
kvm: nVMX: fix nested tsc scaling

When the host supported TSC scaling, L2 would use a TSC multiplier of
0, which causes a VM entry failure. Now L2's TSC uses the same
multiplier as L1.

Signed-off-by: Peter Feiner <pfeiner@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
8 years agoKVM: nVMX: postpone VMCS changes on MSR_IA32_APICBASE write
Radim Krčmář [Mon, 8 Aug 2016 18:16:23 +0000 (20:16 +0200)]
KVM: nVMX: postpone VMCS changes on MSR_IA32_APICBASE write

If vmcs12 does not intercept APIC_BASE writes, then KVM will handle the
write with vmcs02 as the current VMCS.
This will incorrectly apply modifications intended for vmcs01 to vmcs02
and L2 can use it to gain access to L0's x2APIC registers by disabling
virtualized x2APIC while using msr bitmap that assumes enabled.

Postpone execution of vmx_set_virtual_x2apic_mode until vmcs01 is the
current VMCS.  An alternative solution would temporarily make vmcs01 the
current VMCS, but it requires more care.

Fixes: 8d14695f9542 ("x86, apicv: add virtual x2apic support")
Reported-by: Jim Mattson <jmattson@google.com>
Reviewed-by: Wanpeng Li <wanpeng.li@hotmail.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
8 years agoKVM: nVMX: fix msr bitmaps to prevent L2 from accessing L0 x2APIC
Radim Krčmář [Mon, 8 Aug 2016 18:16:22 +0000 (20:16 +0200)]
KVM: nVMX: fix msr bitmaps to prevent L2 from accessing L0 x2APIC

msr bitmap can be used to avoid a VM exit (interception) on guest MSR
accesses.  In some configurations of VMX controls, the guest can even
directly access host's x2APIC MSRs.  See SDM 29.5 VIRTUALIZING MSR-BASED
APIC ACCESSES.

L2 could read all L0's x2APIC MSRs and write TPR, EOI, and SELF_IPI.
To do so, L1 would first trick KVM to disable all possible interceptions
by enabling APICv features and then would turn those features off;
nested_vmx_merge_msr_bitmap() only disabled interceptions, so VMX would
not intercept previously enabled MSRs even though they were not safe
with the new configuration.

Correctly re-enabling interceptions is not enough as a second bug would
still allow L1+L2 to access host's MSRs: msr bitmap was shared for all
VMCSs, so L1 could trigger a race to get the desired combination of msr
bitmap and VMX controls.

This fix allocates a msr bitmap for every L1 VCPU, allows only safe
x2APIC MSRs from L1's msr bitmap, and disables msr bitmaps if they would
have to intercept everything anyway.

Fixes: 3af18d9c5fe9 ("KVM: nVMX: Prepare for using hardware MSR bitmap")
Reported-by: Jim Mattson <jmattson@google.com>
Suggested-by: Wincy Van <fanwenyi0529@gmail.com>
Reviewed-by: Wanpeng Li <wanpeng.li@hotmail.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
8 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Linus Torvalds [Thu, 18 Aug 2016 00:26:58 +0000 (17:26 -0700)]
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

Pull networking fixes from David Miller:

 1) Buffers powersave frame test is reversed in cfg80211, fix from Felix
    Fietkau.

 2) Remove bogus WARN_ON in openvswitch, from Jarno Rajahalme.

 3) Fix some tg3 ethtool logic bugs, and one that would cause no
    interrupts to be generated when rx-coalescing is set to 0.  From
    Satish Baddipadige and Siva Reddy Kallam.

 4) QLCNIC mailbox corruption and napi budget handling fix from Manish
    Chopra.

 5) Fix fib_trie logic when walking the trie during /proc/net/route
    output than can access a stale node pointer.  From David Forster.

 6) Several sctp_diag fixes from Phil Sutter.

 7) PAUSE frame handling fixes in mlxsw driver from Ido Schimmel.

 8) Checksum fixup fixes in bpf from Daniel Borkmann.

 9) Memork leaks in nfnetlink, from Liping Zhang.

10) Use after free in rxrpc, from David Howells.

11) Use after free in new skb_array code of macvtap driver, from Jason
    Wang.

12) Calipso resource leak, from Colin Ian King.

13) mediatek bug fixes (missing stats sync init, etc.) from Sean Wang.

14) Fix bpf non-linear packet write helpers, from Daniel Borkmann.

15) Fix lockdep splats in macsec, from Sabrina Dubroca.

16) hv_netvsc bug fixes from Vitaly Kuznetsov, mostly to do with VF
    handling.

17) Various tc-action bug fixes, from CONG Wang.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (116 commits)
  net_sched: allow flushing tc police actions
  net_sched: unify the init logic for act_police
  net_sched: convert tcf_exts from list to pointer array
  net_sched: move tc offload macros to pkt_cls.h
  net_sched: fix a typo in tc_for_each_action()
  net_sched: remove an unnecessary list_del()
  net_sched: remove the leftover cleanup_a()
  mlxsw: spectrum: Allow packets to be trapped from any PG
  mlxsw: spectrum: Unmap 802.1Q FID before destroying it
  mlxsw: spectrum: Add missing rollbacks in error path
  mlxsw: reg: Fix missing op field fill-up
  mlxsw: spectrum: Trap loop-backed packets
  mlxsw: spectrum: Add missing packet traps
  mlxsw: spectrum: Mark port as active before registering it
  mlxsw: spectrum: Create PVID vPort before registering netdevice
  mlxsw: spectrum: Remove redundant errors from the code
  mlxsw: spectrum: Don't return upon error in removal path
  i40e: check for and deal with non-contiguous TCs
  ixgbe: Re-enable ability to toggle VLAN filtering
  ixgbe: Force VLNCTRL.VFE to be set in all VMDq paths
  ...

8 years agoMerge branch 'tc_action-fixes'
David S. Miller [Wed, 17 Aug 2016 23:27:58 +0000 (19:27 -0400)]
Merge branch 'tc_action-fixes'

Cong Wang says:

====================
net_sched: tc action fixes and updates

This patchset fixes a few regressions caused by the previous
code refactor and more. Thanks to Jamal for catching them!

Note, patch 3/7 and 4/7 are not strictly necessary for this patchset,
I just want to carry them together.

---
v4: adjust an indention for Jamal
    add two more patches

v3: avoid list for fast path, suggested by Jamal

v2: replace flex_array with regular dynamic array
    keep tcf_action_stats_update() in act_api.h
    fix macro typos found by Amir
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet_sched: allow flushing tc police actions
Roman Mashak [Sun, 14 Aug 2016 05:35:02 +0000 (22:35 -0700)]
net_sched: allow flushing tc police actions

The act_police uses its own code to walk the
action hashtable, which leads to that we could
not flush standalone tc police actions, so just
switch to tcf_generic_walker() like other actions.

(Joint work from Roman and Cong.)

Signed-off-by: Roman Mashak <mrv@mojatatu.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet_sched: unify the init logic for act_police
WANG Cong [Sun, 14 Aug 2016 05:35:01 +0000 (22:35 -0700)]
net_sched: unify the init logic for act_police

Jamal reported a crash when we create a police action
with a specific index, this is because the init logic
is not correct, we should always create one for this
case. Just unify the logic with other tc actions.

Fixes: a03e6fe56971 ("act_police: fix a crash during removal")
Reported-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet_sched: convert tcf_exts from list to pointer array
WANG Cong [Sun, 14 Aug 2016 05:35:00 +0000 (22:35 -0700)]
net_sched: convert tcf_exts from list to pointer array

As pointed out by Jamal, an action could be shared by
multiple filters, so we can't use list to chain them
any more after we get rid of the original tc_action.
Instead, we could just save pointers to these actions
in tcf_exts, since they are refcount'ed, so convert
the list to an array of pointers.

The "ugly" part is the action API still accepts list
as a parameter, I just introduce a helper function to
convert the array of pointers to a list, instead of
relying on the C99 feature to iterate the array.

Fixes: a85a970af265 ("net_sched: move tc_action into tcf_common")
Reported-by: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet_sched: move tc offload macros to pkt_cls.h
WANG Cong [Sun, 14 Aug 2016 05:34:59 +0000 (22:34 -0700)]
net_sched: move tc offload macros to pkt_cls.h

struct tcf_exts belongs to filters, should not be visible
to plain tc actions.

Cc: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet_sched: fix a typo in tc_for_each_action()
WANG Cong [Sun, 14 Aug 2016 05:34:58 +0000 (22:34 -0700)]
net_sched: fix a typo in tc_for_each_action()

It is harmless because all users pass 'a' to this macro.

Fixes: 00175aec941e ("net/sched: Macro instead of CONFIG_NET_CLS_ACT ifdef")
Cc: Amir Vadai <amir@vadai.me>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet_sched: remove an unnecessary list_del()
WANG Cong [Sun, 14 Aug 2016 05:34:57 +0000 (22:34 -0700)]
net_sched: remove an unnecessary list_del()

This list_del() for tc action is not needed actually,
because we only use this list to chain bulk operations,
therefore should not be carried for latter operations.

Fixes: ec0595cc4495 ("net_sched: get rid of struct tcf_common")
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet_sched: remove the leftover cleanup_a()
WANG Cong [Sun, 14 Aug 2016 05:34:56 +0000 (22:34 -0700)]
net_sched: remove the leftover cleanup_a()

After refactoring tc_action into tcf_common, we no
longer need to cleanup temporary "actions" in list,
they are permanently stored in the hashtable.

Fixes: a85a970af265 ("net_sched: move tc_action into tcf_common")
Reported-by: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch '1GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/net...
David S. Miller [Wed, 17 Aug 2016 23:20:24 +0000 (19:20 -0400)]
Merge branch '1GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/net-queue

Jeff Kirsher says:

====================
Intel Wired LAN Driver Updates 2016-08-16

This series contains fixes to e1000e, igb, ixgbe and i40e.

Kshitiz Gupta provides a fix for igb to resolve the PHY delay compensation
math in several functions.

Jarod Wilson provides a fix for e1000e which had to broken up into 2
patches, first is prepares the driver for expanding the list of NICs
that have occasional ~10 hour clock jumps when being used for PTP.
Second patch actually fixes i218 silicon which has been experiencing
the clock jumps while using PTP.

Alex provides 2 patches for ixgbe now that he is back at Intel.  First
fixes setting VLNCTRL.VFE bit, which was left unchanged in earlier patches
which resulted in disabling VLAN filtering for all the VFs.  Second
corrects the support for disabling the VLAN tag filtering via the
feature bit.

Lastly, David fixes i40e which was causing a kernel panic when
non-contiguous traffic classes or traffic classes not starting with TC0,
were configured on a link partner switch.  To fix this, changed the
logic when determining the total number of TCs enabled.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'mlxsw-fixes'
David S. Miller [Wed, 17 Aug 2016 23:18:34 +0000 (19:18 -0400)]
Merge branch 'mlxsw-fixes'

Jiri Pirko says:

====================
mlxsw: IPv4 UC router fixes

Ido says:
Patches 1-3 fix a long standing problem in the driver's init sequence,
which manifests itself quite often when routing daemons try to configure
an IP address on registered netdevs that don't yet have an associated
vPort.

Patches 4-9 add missing packet traps for the router to work properly and
also fix ordering issue following the recent changes to the driver's init
sequence.

The last patch isn't related to the router, but fixes a general problem
in which under certain conditions packets aren't trapped to CPU.

v1->v2:
- Change order of patch 7
- Add patch 6 following Ilan's comment
- Add patchset name and cover letter
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agomlxsw: spectrum: Allow packets to be trapped from any PG
Ido Schimmel [Wed, 17 Aug 2016 14:39:37 +0000 (16:39 +0200)]
mlxsw: spectrum: Allow packets to be trapped from any PG

When packets enter the device they are classified to a priority group
(PG) buffer based on their PCP value. After their egress port and
traffic class are determined they are moved to the switch's shared
buffer and await transmission, if:

(Ingress{Port}.Usage < Thres && Ingress{Port,PG}.Usage < Thres &&
 Egress{Port}.Usage < Thres && Egress{Port,TC}.Usage < Thres)
||
(Ingress{Port}.Usage < Min || Ingress{Port,PG} < Min ||
 Egress{Port}.Usage < Min || Egress{Port,TC}.Usage < Min)

Packets scheduled to transmission through CPU port (trapped to CPU) use
traffic class 7, which has a zero maximum and minimum quotas. However,
when such packets arrive from PG 0 they are admitted to the shared
buffer as PG 0 has a non-zero minimum quota.

Allow all packets to be trapped to the CPU - regardless of the PG they
were classified to - by assigning a 10KB minimum quota for CPU port and
TC7.

Fixes: 8e8dfe9fdf06 ("mlxsw: spectrum: Add IEEE 802.1Qaz ETS support")
Reported-by: Tamir Winetroub <tamirw@mellanox.com>
Tested-by: Tamir Winetroub <tamirw@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agomlxsw: spectrum: Unmap 802.1Q FID before destroying it
Ido Schimmel [Wed, 17 Aug 2016 14:39:36 +0000 (16:39 +0200)]
mlxsw: spectrum: Unmap 802.1Q FID before destroying it

Before destroying the 802.1Q FID we should first remove the VID-to-FID
mapping. This makes mlxsw_sp_fid_destroy() symmetric with regards to
mlxsw_sp_fid_create().

Fixes: 14d39461b3f4 ("mlxsw: spectrum: Use per-FID struct for the VLAN-aware bridge")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agomlxsw: spectrum: Add missing rollbacks in error path
Ido Schimmel [Wed, 17 Aug 2016 14:39:35 +0000 (16:39 +0200)]
mlxsw: spectrum: Add missing rollbacks in error path

While going over the code I noticed we are missing two rollbacks in the
port's creation error path. Add them and adjust the place of one of them
in the port's removal sequence so that both are symmetric.

Fixes: 56ade8fe3fe1 ("mlxsw: spectrum: Add initial support for Spectrum ASIC")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agomlxsw: reg: Fix missing op field fill-up
Jiri Pirko [Wed, 17 Aug 2016 14:39:34 +0000 (16:39 +0200)]
mlxsw: reg: Fix missing op field fill-up

Ralue pack function needs to set op, otherwise it is 0 for add always.

Fixes: d5a1c749d22 ("mlxsw: reg: Add Router Algorithmic LPM Unicast Entry Register definition")
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agomlxsw: spectrum: Trap loop-backed packets
Ido Schimmel [Wed, 17 Aug 2016 14:39:33 +0000 (16:39 +0200)]
mlxsw: spectrum: Trap loop-backed packets

One of the conditions to generate an ICMP Redirect Message is that "the
packet is being forwarded out the same physical interface that it was
received from" (RFC 1812).

Therefore, we need to be able to trap such packets and let the kernel
decide what to do with them.

For each RIF, enable the loop-back filter, which will raise the LBERROR
trap whenever the ingress RIF equals the egress RIF.

Fixes: 99724c18fc66 ("mlxsw: spectrum: Introduce support for router interfaces")
Reported-by: Ilan Tayari <ilant@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agomlxsw: spectrum: Add missing packet traps
Elad Raz [Wed, 17 Aug 2016 14:39:32 +0000 (16:39 +0200)]
mlxsw: spectrum: Add missing packet traps

Add the following traps:

1) MTU Error: Trap packets whose size is bigger than the egress RIF's
MTU. If DF bit isn't set, traffic will continue to be routed in slow
path.

2) TTL Error: Trap packets whose TTL expired. This allows traceroute to
work properly.

3) OSPF packets.

Fixes: 7b27ce7bb9cd ("mlxsw: spectrum: Add traps needed for router implementation")
Signed-off-by: Elad Raz <eladr@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agomlxsw: spectrum: Mark port as active before registering it
Ido Schimmel [Wed, 17 Aug 2016 14:39:31 +0000 (16:39 +0200)]
mlxsw: spectrum: Mark port as active before registering it

Commit bbf2a4757b30 ("mlxsw: spectrum: Initialize ports at the end of
init sequence") moved ports initialization to the end of the init
sequence, which means ports are the first to be removed during fini.

Since the FDB delayed work is still active when ports are removed it's
possible for it to process FDB notifications of inactive ports,
resulting in a warning message.

Fix that by marking ports as inactive only after unregistering them. The
NETDEV_UNREGISTER event will invoke bridge's driver port removal
sequence that will cause the FDB (and FDB notifications) to be flushed.

Fixes: bbf2a4757b30 ("mlxsw: spectrum: Initialize ports at the end of init sequence")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agomlxsw: spectrum: Create PVID vPort before registering netdevice
Ido Schimmel [Wed, 17 Aug 2016 14:39:30 +0000 (16:39 +0200)]
mlxsw: spectrum: Create PVID vPort before registering netdevice

After registering a netdevice it's possible for user space applications
to configure an IP address on it. From the driver's perspective, this
means a router interface (RIF) should be created for the PVID vPort.

Therefore, we must create the PVID vPort before registering the
netdevice.

Fixes: 99724c18fc66 ("mlxsw: spectrum: Introduce support for router interfaces")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agomlxsw: spectrum: Remove redundant errors from the code
Ido Schimmel [Wed, 17 Aug 2016 14:39:29 +0000 (16:39 +0200)]
mlxsw: spectrum: Remove redundant errors from the code

Currently, when device configuration fails we emit errors to the kernel
log despite the fact we already get these from the EMAD transaction
layer, so remove them.

In addition to being unnecessary, removing these error messages will
allow us to reuse mlxsw_sp_port_add_vid() to create the PVID vPort
before registering the netdevice.

Fixes: 99724c18fc66 ("mlxsw: spectrum: Introduce support for router interfaces")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agomlxsw: spectrum: Don't return upon error in removal path
Ido Schimmel [Wed, 17 Aug 2016 14:39:28 +0000 (16:39 +0200)]
mlxsw: spectrum: Don't return upon error in removal path

When removing a VLAN filter from the device we shouldn't return upon the
first error we encounter, as otherwise we'll have resources that will
never be freed nor used.

Instead, we should keep trying to free as much resources as possible in
a best effort mode.

Remove the error message as well, since we already get these from the
EMAD transaction code.

Fixes: 99724c18fc66 ("mlxsw: spectrum: Introduce support for router interfaces")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge tag 'for-v4.8-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux...
Linus Torvalds [Wed, 17 Aug 2016 19:10:22 +0000 (12:10 -0700)]
Merge tag 'for-v4.8-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply

Pull power supply fixes from Sebastian Reichel.

* tag 'for-v4.8-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply:
  power_supply: tps65217-charger: fix missing platform_set_drvdata()
  power: reset: hisi-reboot: Unmap region obtained by of_iomap
  power: reset: reboot-mode: fix build error of missing ioremap/iounmap on UM
  power: supply: max17042_battery: fix model download bug.

8 years agoarm64: KVM: report configured SRE value to 32-bit world
Vladimir Murzin [Wed, 10 Aug 2016 09:49:43 +0000 (10:49 +0100)]
arm64: KVM: report configured SRE value to 32-bit world

After commit b34f2bc ("arm64: KVM: Make ICC_SRE_EL1 access return the
configured SRE value") we report SRE value to 64-bit guest, but 32-bit
one still handled as RAZ/WI what leads to funny promise we do not keep:

"GICv3: GIC: unable to set SRE (disabled at EL2), panic ahead"

Instead, return the actual value of the ICC_SRE_EL1 register that the
guest should see.

 [ Tweaked commit message - Christoffer ]

Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoarm64: KVM: remove misleading comment on pmu status
Vladimir Murzin [Wed, 10 Aug 2016 09:49:42 +0000 (10:49 +0100)]
arm64: KVM: remove misleading comment on pmu status

Comment about how PMU access is handled is not relavant since v4.6
where proper PMU support was added in.

Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoKVM: arm/arm64: timer: Workaround misconfigured timer interrupt
Marc Zyngier [Tue, 16 Aug 2016 14:03:02 +0000 (15:03 +0100)]
KVM: arm/arm64: timer: Workaround misconfigured timer interrupt

Similarily to f005bd7e3b84 ("clocksource/arm_arch_timer: Force
per-CPU interrupt to be level-triggered"), make sure we can
survive an interrupt that has been misconfigured as edge-triggered
by forcing it to be level-triggered (active low is assumed, but
the GIC doesn't really care whether this is high or low).

Hopefully, the amount of shouting in the kernel log will convince
the user to do something about their firmware.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoarm64: Document workaround for Cortex-A72 erratum #853709
Marc Zyngier [Tue, 16 Aug 2016 14:03:01 +0000 (15:03 +0100)]
arm64: Document workaround for Cortex-A72 erratum #853709

We already have a workaround for Cortex-A57 erratum #852523,
but Cortex-A72 r0p0 to r0p2 do suffer from the same issue
(known as erratum #853709).

Let's document the fact that we already handle this.

Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoKVM: arm/arm64: Change misleading use of is_error_pfn
Christoffer Dall [Wed, 17 Aug 2016 08:46:10 +0000 (10:46 +0200)]
KVM: arm/arm64: Change misleading use of is_error_pfn

When converting a gfn to a pfn, we call gfn_to_pfn_prot, which returns
various kinds of error values.  It turns out that is_error_pfn() only
returns true when the gfn was found in a memory slot and could somehow
not be used, but it does not return true if the gfn does not belong to
any memory slot.

Change use to is_error_noslot_pfn() which covers both cases.

Note: Since we already check for kvm_is_error_hva(hva) explicitly in the
caller of this function while holding the kvm->srcu lock protecting the
memory slots, this should never be a problem, but nevertheless this
change is warranted as it shows the intention of the code.

Reported-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
8 years agoMerge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
Linus Torvalds [Tue, 16 Aug 2016 22:51:57 +0000 (15:51 -0700)]
Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

Pull virtio/vhost fixes from Michael Tsirkin:
 - test fixes
 - a vsock fix

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  tools/virtio: add dma stubs
  vhost/test: fix after swiotlb changes
  vhost/vsock: drop space available check for TX vq
  ringtest: test build fix

8 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Linus Torvalds [Tue, 16 Aug 2016 22:50:22 +0000 (15:50 -0700)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 fixes from Martin Schwidefsky:
 "A couple of bug fixes, minor cleanup and a change to the default
  config"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/dasd: fix failing CUIR assignment under LPAR
  s390/pageattr: handle numpages parameter correctly
  s390/dasd: fix hanging device after clear subchannel
  s390/qdio: avoid reschedule of outbound tasklet once killed
  s390/qdio: remove checks for ccw device internal state
  s390/qdio: fix double return code evaluation
  s390/qdio: get rid of spin_lock_irqsave usage
  s390/cio: remove subchannel_id from ccw_device_private
  s390/qdio: obtain subchannel_id via ccw_device_get_schid()
  s390/cio: stop using subchannel_id from ccw_device_private
  s390/config: make the vector optimized crc function builtin
  s390/lib: fix memcmp and strstr
  s390/crc32-vx: Fix checksum calculation for small sizes
  s390: clarify compressed image code path

8 years agoMerge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Linus Torvalds [Tue, 16 Aug 2016 20:37:26 +0000 (13:37 -0700)]
Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

Pull crypto fixes from Herbert Xu:
 "This fixes the following issues:

   - Missing ULL suffixes for 64-bit constants in sha3.
   - Two caam AEAD regressions.
   - Bogus setkey hooks in non-hmac caam hashes.
   - Missing kbuild dependency for powerpc crc32c"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: caam - fix non-hmac hashes
  crypto: powerpc - CRYPT_CRC32C_VPMSUM should depend on ALTIVEC
  crypto: caam - defer aead_set_sh_desc in case of zero authsize
  crypto: caam - fix echainiv(authenc) encrypt shared descriptor
  crypto: sha3 - Add missing ULL suffixes for 64-bit constants

8 years agoi40e: check for and deal with non-contiguous TCs
Dave Ertman [Fri, 12 Aug 2016 16:56:32 +0000 (09:56 -0700)]
i40e: check for and deal with non-contiguous TCs

The i40e driver was causing a kernel panic when
non-contiguous Traffic Classes, or Traffic Classes not
starting with TC0, were configured on a link partner switch.
i40e does not support non-contiguous TCs.

To fix this, the patch changes the logic when determining
the total number of TCs enabled.  Before, this would use the
highest TC number enabled and assume that all TCs below it were
also enabled.  Now, we create a bitmask of enabled TCs and scan
it to determine not only the number of TCs, but also if the set
of enabled TCs starts at zero and is contiguous.  If not, then
DCB is disabled by only returning one TC.

Signed-off-by: Dave Ertman <david.m.ertman@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
8 years agoixgbe: Re-enable ability to toggle VLAN filtering
Alexander Duyck [Fri, 12 Aug 2016 16:53:39 +0000 (09:53 -0700)]
ixgbe: Re-enable ability to toggle VLAN filtering

Back when I submitted the GSO code I messed up and dropped the support for
disabling the VLAN tag filtering via the feature bit.  This patch
re-enables the use of the NETIF_F_HW_VLAN_CTAG_FILTER to enable/disable the
VLAN filtering independent of toggling promiscuous mode.

Fixes: b83e30104b ("ixgbe/ixgbevf: Add support for GSO partial")
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
8 years agoixgbe: Force VLNCTRL.VFE to be set in all VMDq paths
Alexander Duyck [Thu, 11 Aug 2016 21:51:56 +0000 (14:51 -0700)]
ixgbe: Force VLNCTRL.VFE to be set in all VMDq paths

When I was adding the code for enabling VLAN promiscuous mode with SR-IOV
enabled I had inadvertently left the VLNCTRL.VFE bit unchanged as I has
assumed there was code in another path that was setting it when we enabled
SR-IOV.  This wasn't the case and as a result we were just disabling VLAN
filtering for all the VFs apparently.

Also the previous patches were always clearing CFIEN which was always set
to 0 by the hardware anyway so I am dropping the redundant bit clearing.

Fixes: 16369564915a ("ixgbe: Add support for VLAN promiscuous with SR-IOV")
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
8 years agoMerge tag 'pinctrl-v4.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw...
Linus Torvalds [Tue, 16 Aug 2016 18:49:02 +0000 (11:49 -0700)]
Merge tag 'pinctrl-v4.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl

Pull pin control fixes from Linus Walleij:
 "Here are a few pin control fixes for the v4.8 series, nothing special
  about them:

   - Add the missing <linux/io.h> header to the Intel Merrifield driver
     to get rid of build mess.

   - Drop two instances of pinctrl_unregister() called for drivers using
     devm_* resource management.

   - Remove the default debounce time for the AMD driver"

* tag 'pinctrl-v4.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
  pinctrl: intel: merrifield: Add missed header
  pinctrl/amd: Remove the default de-bounce time
  pinctrl: pistachio: Drop pinctrl_unregister for devm_ registered device
  pinctrl: meson: Drop pinctrl_unregister for devm_ registered device

8 years agoe1000e: fix PTP on e1000_pch_lpt variants
Jarod Wilson [Tue, 26 Jul 2016 18:25:35 +0000 (14:25 -0400)]
e1000e: fix PTP on e1000_pch_lpt variants

I've got reports that the Intel I-218V NIC in Intel NUC5i5RYH systems used
as a PTP slave experiences random ~10 hour clock jumps, which are resolved
if the same workaround for the 82574 and 82583 is employed, so set the
appropriate flag2 in e1000_pch_lpt_info too.

Reported-by: Rupesh Patel <rupatel@redhat.com>
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
8 years agoe1000e: factor out systim sanitization
Jarod Wilson [Tue, 26 Jul 2016 18:25:34 +0000 (14:25 -0400)]
e1000e: factor out systim sanitization

This is prepatory work for an expanding list of adapter families that have
occasional ~10 hour clock jumps when being used for PTP. Factor out the
sanitization function and convert to using a feature (bug) flag, per
suggestion from Jesse Brandeburg.

Littering functional code with device-specific checks is much messier than
simply checking a flag, and having device-specific init set flags as needed.
There are probably a number of other cases in the e1000e code that
could/should be converted similarly.

Suggested-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
8 years agoigb: fix adjusting PTP timestamps for Tx/Rx latency
Kshitiz Gupta [Sat, 16 Jul 2016 07:23:45 +0000 (02:23 -0500)]
igb: fix adjusting PTP timestamps for Tx/Rx latency

Fix PHY delay compensation math in igb_ptp_tx_hwtstamp() and
igb_ptp_rx_rgtstamp. Add PHY delay compensation in
igb_ptp_rx_pktstamp().

In the IGB driver, there are two functions that retrieve timestamps
received by the PHY - igb_ptp_rx_rgtstamp() and igb_ptp_rx_pktstamp().
The previous commit only changed igb_ptp_rx_rgtstamp(), and the change
was incorrect.

There are two instances in which PHY delay compensations should be
made:

- Before the packet transmission over the PHY, the latency between
  when the packet is timestamped and transmission of the packets,
  should be an add operation, but it is currently a subtract.

- After the packets are received from the PHY, the latency between
  the receiving and timestamping of the packets should be a subtract
  operation, but it is currently an add.

Signed-off-by: Kshitiz Gupta <kshitiz.gupta@ni.com>
Fixes: 3f544d2 (igb: adjust ptp timestamps for tx/rx latency)
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>