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This patch updates the kernel non-linear virtual map to 512TB when
we're built with 64K page size and are using the hash MMU. We allocate
one context for the vmalloc region and hence the max virtual area size
is limited by the context map size (512TB for 64K and 64TB for 4K page
size).
This patch fixes boot failures with large amounts of system RAM where
we need large vmalloc space to handle per cpu allocations.
Signed-off-by: Michael Ellerman <[email protected]>
Signed-off-by: Aneesh Kumar K.V <[email protected]>
Tested-by: Aneesh Kumar K.V <[email protected]>
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GCC 8 warns about the logic in vr_get/set(), which with -Werror breaks
the build:
In function ‘user_regset_copyin’,
inlined from ‘vr_set’ at arch/powerpc/kernel/ptrace.c:628:9:
include/linux/regset.h:295:4: error: ‘memcpy’ offset [-527, -529] is
out of the bounds [0, 16] of object ‘vrsave’ with type ‘union
<anonymous>’ [-Werror=array-bounds]
arch/powerpc/kernel/ptrace.c: In function ‘vr_set’:
arch/powerpc/kernel/ptrace.c:623:5: note: ‘vrsave’ declared here
} vrsave;
This has been identified as a regression in GCC, see GCC bug 88273.
However we can avoid the warning and also simplify the logic and make
it more robust.
Currently we pass -1 as end_pos to user_regset_copyout(). This says
"copy up to the end of the regset".
The definition of the regset is:
[REGSET_VMX] = {
.core_note_type = NT_PPC_VMX, .n = 34,
.size = sizeof(vector128), .align = sizeof(vector128),
.active = vr_active, .get = vr_get, .set = vr_set
},
The end is calculated as (n * size), ie. 34 * sizeof(vector128).
In vr_get/set() we pass start_pos as 33 * sizeof(vector128), meaning
we can copy up to sizeof(vector128) into/out-of vrsave.
The on-stack vrsave is defined as:
union {
elf_vrreg_t reg;
u32 word;
} vrsave;
And elf_vrreg_t is:
typedef __vector128 elf_vrreg_t;
So there is no bug, but we rely on all those sizes lining up,
otherwise we would have a kernel stack exposure/overwrite on our
hands.
Rather than relying on that we can pass an explict end_pos based on
the sizeof(vrsave). The result should be exactly the same but it's
more obviously not over-reading/writing the stack and it avoids the
compiler warning.
Reported-by: Meelis Roos <[email protected]>
Reported-by: Mathieu Malaterre <[email protected]>
Cc: [email protected]
Tested-by: Mathieu Malaterre <[email protected]>
Tested-by: Meelis Roos <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
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The change_pte() notifier was designed to use as a quick path to
update secondary MMU PTEs on write permission changes or PFN changes.
For KVM, it could reduce the vm-exits when vcpu faults on the pages
that was touched up by KSM. It's not used to do cache invalidations,
for example, if we see the notifier will be called before the real PTE
update after all (please see set_pte_at_notify that set_pte_at was
called later).
All the necessary cache invalidation should all be done in
invalidate_range() already.
Signed-off-by: Peter Xu <[email protected]>
Reviewed-by: Andrea Arcangeli <[email protected]>
Reviewed-by: Alistair Popple <[email protected]>
Reviewed-by: Balbir Singh <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
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Merge commits we're sharing with kvm-ppc tree.
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This adds an "in_guest" parameter to machine_check_print_event_info()
so that we can avoid trying to translate guest NIP values into
symbolic form using the host kernel's symbol table.
Reviewed-by: Aravinda Prasad <[email protected]>
Reviewed-by: Mahesh Salgaonkar <[email protected]>
Signed-off-by: Paul Mackerras <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
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This makes the handling of machine check interrupts that occur inside
a guest simpler and more robust, with less done in assembler code and
in real mode.
Now, when a machine check occurs inside a guest, we always get the
machine check event struct and put a copy in the vcpu struct for the
vcpu where the machine check occurred. We no longer call
machine_check_queue_event() from kvmppc_realmode_mc_power7(), because
on POWER8, when a vcpu is running on an offline secondary thread and
we call machine_check_queue_event(), that calls irq_work_queue(),
which doesn't work because the CPU is offline, but instead triggers
the WARN_ON(lazy_irq_pending()) in pnv_smp_cpu_kill_self() (which
fires again and again because nothing clears the condition).
All that machine_check_queue_event() actually does is to cause the
event to be printed to the console. For a machine check occurring in
the guest, we now print the event in kvmppc_handle_exit_hv()
instead.
The assembly code at label machine_check_realmode now just calls C
code and then continues exiting the guest. We no longer either
synthesize a machine check for the guest in assembly code or return
to the guest without a machine check.
The code in kvmppc_handle_exit_hv() is extended to handle the case
where the guest is not FWNMI-capable. In that case we now always
synthesize a machine check interrupt for the guest. Previously, if
the host thinks it has recovered the machine check fully, it would
return to the guest without any notification that the machine check
had occurred. If the machine check was caused by some action of the
guest (such as creating duplicate SLB entries), it is much better to
tell the guest that it has caused a problem. Therefore we now always
generate a machine check interrupt for guests that are not
FWNMI-capable.
Reviewed-by: Aravinda Prasad <[email protected]>
Reviewed-by: Mahesh Salgaonkar <[email protected]>
Signed-off-by: Paul Mackerras <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
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Merge hch's big DMA rework series. This is in a topic branch in case he
wants to merge it to minimise conflicts.
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kvmhv_p9_guest_entry() implements a fast-path guest entry for Power9
when guest and host are both running with the Radix MMU.
Currently in that path we don't save the host AMR (Authority Mask
Register) value, and we always restore 0 on return to the host. That
is OK at the moment because the AMR is not used for storage keys with
the Radix MMU.
However we plan to start using the AMR on Radix to prevent the kernel
from reading/writing to userspace outside of copy_to/from_user(). In
order to make that work we need to save/restore the AMR value.
We only restore the value if it is different from the guest value,
which is already in the register when we exit to the host. This should
mean we rarely need to actually restore the value when running a
modern Linux as a guest, because it will be using the same value as
us.
Signed-off-by: Michael Ellerman <[email protected]>
Tested-by: Russell Currey <[email protected]>
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grow_halt_poll_ns() have a strange behaviour in case
(vcpu->halt_poll_ns != 0) &&
(vcpu->halt_poll_ns < halt_poll_ns_grow_start).
In this case, vcpu->halt_poll_ns will be multiplied by grow factor
(halt_poll_ns_grow) which will require several grow iteration in order
to reach a value bigger than halt_poll_ns_grow_start.
This means that growing vcpu->halt_poll_ns from value of 0 is slower
than growing it from a positive value less than halt_poll_ns_grow_start.
Which is misleading and inaccurate.
Fix issue by changing grow_halt_poll_ns() to set vcpu->halt_poll_ns
to halt_poll_ns_grow_start in any case that
(vcpu->halt_poll_ns < halt_poll_ns_grow_start).
Regardless if vcpu->halt_poll_ns is 0.
use READ_ONCE to get a consistent number for all cases.
Reviewed-by: Boris Ostrovsky <[email protected]>
Reviewed-by: Liran Alon <[email protected]>
Signed-off-by: Nir Weiner <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>
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The hard-coded value 10000 in grow_halt_poll_ns() stands for the initial
start value when raising up vcpu->halt_poll_ns.
It actually sets the first timeout to the first polling session.
This value has significant effect on how tolerant we are to outliers.
On the standard case, higher value is better - we will spend more time
in the polling busyloop, handle events/interrupts faster and result
in better performance.
But on outliers it puts us in a busy loop that does nothing.
Even if the shrink factor is zero, we will still waste time on the first
iteration.
The optimal value changes between different workloads. It depends on
outliers rate and polling sessions length.
As this value has significant effect on the dynamic halt-polling
algorithm, it should be configurable and exposed.
Reviewed-by: Boris Ostrovsky <[email protected]>
Reviewed-by: Liran Alon <[email protected]>
Signed-off-by: Nir Weiner <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>
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grow_halt_poll_ns() have a strange behavior in case
(halt_poll_ns_grow == 0) && (vcpu->halt_poll_ns != 0).
In this case, vcpu->halt_pol_ns will be set to zero.
That results in shrinking instead of growing.
Fix issue by changing grow_halt_poll_ns() to not modify
vcpu->halt_poll_ns in case halt_poll_ns_grow is zero
Reviewed-by: Boris Ostrovsky <[email protected]>
Reviewed-by: Liran Alon <[email protected]>
Signed-off-by: Nir Weiner <[email protected]>
Suggested-by: Liran Alon <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>
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kvm_arch_memslots_updated() is at this point in time an x86-specific
hook for handling MMIO generation wraparound. x86 stashes 19 bits of
the memslots generation number in its MMIO sptes in order to avoid
full page fault walks for repeat faults on emulated MMIO addresses.
Because only 19 bits are used, wrapping the MMIO generation number is
possible, if unlikely. kvm_arch_memslots_updated() alerts x86 that
the generation has changed so that it can invalidate all MMIO sptes in
case the effective MMIO generation has wrapped so as to avoid using a
stale spte, e.g. a (very) old spte that was created with generation==0.
Given that the purpose of kvm_arch_memslots_updated() is to prevent
consuming stale entries, it needs to be called before the new generation
is propagated to memslots. Invalidating the MMIO sptes after updating
memslots means that there is a window where a vCPU could dereference
the new memslots generation, e.g. 0, and incorrectly reuse an old MMIO
spte that was created with (pre-wrap) generation==0.
Fixes: e59dbe09f8e6 ("KVM: Introduce kvm_arch_memslots_updated()")
Cc: <[email protected]>
Signed-off-by: Sean Christopherson <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>
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Two easily resolvable overlapping change conflicts, one in
TCP and one in the eBPF verifier.
Signed-off-by: David S. Miller <[email protected]>
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All new 32-bit architectures should have 64-bit userspace off_t type, but
existing architectures has 32-bit ones.
To enforce the rule, new config option is added to arch/Kconfig that defaults
ARCH_32BIT_OFF_T to be disabled for new 32-bit architectures. All existing
32-bit architectures enable it explicitly.
New option affects force_o_largefile() behaviour. Namely, if userspace
off_t is 64-bits long, we have no reason to reject user to open big files.
Note that even if architectures has only 64-bit off_t in the kernel
(arc, c6x, h8300, hexagon, nios2, openrisc, and unicore32),
a libc may use 32-bit off_t, and therefore want to limit the file size
to 4GB unless specified differently in the open flags.
Signed-off-by: Yury Norov <[email protected]>
Acked-by: Arnd Bergmann <[email protected]>
Signed-off-by: Yury Norov <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>
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There's a few important fixes in our fixes branch, in particular the
pgd/pud_present() one, so merge it now.
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This adds an entry to the kvm_stats_debugfs directory which provides the
number of large (2M or 1G) pages which have been used to setup the guest
mappings, for radix guests.
Signed-off-by: Suraj Jitindar Singh <[email protected]>
Signed-off-by: Paul Mackerras <[email protected]>
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The SPAPR TCE KVM device references all hardware IOMMU tables assigned to
some IOMMU group to ensure that in-kernel KVM acceleration of H_PUT_TCE
can work. The tables are references when an IOMMU group gets registered
with the VFIO KVM device by the KVM_DEV_VFIO_GROUP_ADD ioctl;
KVM_DEV_VFIO_GROUP_DEL calls into the dereferencing code
in kvm_spapr_tce_release_iommu_group() which walks through the list of
LIOBNs, finds a matching IOMMU table and calls kref_put() when found.
However that code stops after the very first successful derefencing
leaving other tables referenced till the SPAPR TCE KVM device is destroyed
which normally happens on guest reboot or termination so if we do hotplug
and unplug in a loop, we are leaking IOMMU tables here.
This removes a premature return to let kvm_spapr_tce_release_iommu_group()
find and dereference all attached tables.
Fixes: 121f80ba68f ("KVM: PPC: VFIO: Add in-kernel acceleration for VFIO")
Signed-off-by: Alexey Kardashevskiy <[email protected]>
Signed-off-by: Paul Mackerras <[email protected]>
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Devices on the KVM_FAST_MMIO_BUS by definition have length zero and are
thus used for notification purposes rather than data transfer. For
example eventfd for virtio devices.
This means that when emulating mmio instructions which target devices on
this bus we can immediately handle them and return without needing to load
the instruction from guest memory.
For now we restrict this to stores as this is the only use case at
present.
For a normal guest the effect is negligible, however for a nested guest
we save on the order of 5us per access.
Signed-off-by: Suraj Jitindar Singh <[email protected]>
Signed-off-by: Paul Mackerras <[email protected]>
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Currently, the KVM code assumes that if the host kernel is using the
XIVE interrupt controller (the new interrupt controller that first
appeared in POWER9 systems), then the in-kernel XICS emulation will
use the XIVE hardware to deliver interrupts to the guest. However,
this only works when the host is running in hypervisor mode and has
full access to all of the XIVE functionality. It doesn't work in any
nested virtualization scenario, either with PR KVM or nested-HV KVM,
because the XICS-on-XIVE code calls directly into the native-XIVE
routines, which are not initialized and cannot function correctly
because they use OPAL calls, and OPAL is not available in a guest.
This means that using the in-kernel XICS emulation in a nested
hypervisor that is using XIVE as its interrupt controller will cause a
(nested) host kernel crash. To fix this, we change most of the places
where the current code calls xive_enabled() to select between the
XICS-on-XIVE emulation and the plain XICS emulation to call a new
function, xics_on_xive(), which returns false in a guest.
However, there is a further twist. The plain XICS emulation has some
functions which are used in real mode and access the underlying XICS
controller (the interrupt controller of the host) directly. In the
case of a nested hypervisor, this means doing XICS hypercalls
directly. When the nested host is using XIVE as its interrupt
controller, these hypercalls will fail. Therefore this also adds
checks in the places where the XICS emulation wants to access the
underlying interrupt controller directly, and if that is XIVE, makes
the code use the virtual mode fallback paths, which call generic
kernel infrastructure rather than doing direct XICS access.
Signed-off-by: Paul Mackerras <[email protected]>
Reviewed-by: Cédric Le Goater <[email protected]>
Signed-off-by: Paul Mackerras <[email protected]>
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The header search path -I. in kernel Makefiles is very suspicious;
it allows the compiler to search for headers in the top of $(srctree),
where obviously no header file exists.
Commit 46f43c6ee022 ("KVM: powerpc: convert marker probes to event
trace") first added these options, but they are completely useless.
Signed-off-by: Masahiro Yamada <[email protected]>
Signed-off-by: Paul Mackerras <[email protected]>
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Replace kmalloc_node and memset with kzalloc_node
Signed-off-by: wangbo <[email protected]>
Signed-off-by: Paul Mackerras <[email protected]>
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Recent kernels, since commit e15a4fea4dee ("powerpc/64s/hash: Add
some SLB debugging tests", 2018-10-03) use the slbfee. instruction,
which PR KVM currently does not have code to emulate. Consequently
recent kernels fail to boot under PR KVM. This adds emulation of
slbfee., enabling these kernels to boot successfully.
Signed-off-by: Paul Mackerras <[email protected]>
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The compound IOMMU group rework moved iommu_register_group() together
in pnv_pci_ioda_setup_iommu_api() (which is a part of
ppc_md.pcibios_fixup). As the result, pnv_ioda_setup_bus_iommu_group()
does not create groups any more, it only adds devices to groups.
This works fine for boot time devices. However IOMMU groups for
SRIOV's VFs were added by pnv_ioda_setup_bus_iommu_group() so this got
broken: pnv_tce_iommu_bus_notifier() expects a group to be registered
for VF and it is not.
This adds missing group registration and adds a NULL pointer check
into the bus notifier so we won't crash if there is no group, although
it is not expected to happen now because of the change above.
Example oops seen prior to this patch:
$ echo 1 > /sys/bus/pci/devices/0000\:01\:00.0/sriov_numvfs
Unable to handle kernel paging request for data at address 0x00000030
Faulting instruction address: 0xc0000000004a6018
Oops: Kernel access of bad area, sig: 11 [#1]
LE SMP NR_CPUS=2048 NUMA PowerNV
CPU: 46 PID: 7006 Comm: bash Not tainted 4.15-ish
NIP: c0000000004a6018 LR: c0000000004a6014 CTR: 0000000000000000
REGS: c000008fc876b400 TRAP: 0300 Not tainted (4.15-ish)
MSR: 900000000280b033 <SF,HV,VEC,VSX,EE,FP,ME,IR,DR,RI,LE>
CFAR: c000000000d0be20 DAR: 0000000000000030 DSISR: 40000000 SOFTE: 1
...
NIP sysfs_do_create_link_sd.isra.0+0x68/0x150
LR sysfs_do_create_link_sd.isra.0+0x64/0x150
Call Trace:
pci_dev_type+0x0/0x30 (unreliable)
iommu_group_add_device+0x8c/0x600
iommu_add_device+0xe8/0x180
pnv_tce_iommu_bus_notifier+0xb0/0xf0
notifier_call_chain+0x9c/0x110
blocking_notifier_call_chain+0x64/0xa0
device_add+0x524/0x7d0
pci_device_add+0x248/0x450
pci_iov_add_virtfn+0x294/0x3e0
pci_enable_sriov+0x43c/0x580
mlx5_core_sriov_configure+0x15c/0x2f0 [mlx5_core]
sriov_numvfs_store+0x180/0x240
dev_attr_store+0x3c/0x60
sysfs_kf_write+0x64/0x90
kernfs_fop_write+0x1ac/0x240
__vfs_write+0x3c/0x70
vfs_write+0xd8/0x220
SyS_write+0x6c/0x110
system_call+0x58/0x6c
Fixes: 0bd971676e68 ("powerpc/powernv/npu: Add compound IOMMU groups")
Signed-off-by: Alexey Kardashevskiy <[email protected]>
Reported-by: Santwana Samantray <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
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There is no need to provide anything but get_arch_dma_ops to
<linux/dma-mapping.h>. More the remaining declarations to <asm/iommu.h>
and drop all the includes.
Signed-off-by: Christoph Hellwig <[email protected]>
Tested-by: Christian Zigotzky <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
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There is no good reason for this helper, just opencode it.
Signed-off-by: Christoph Hellwig <[email protected]>
Tested-by: Christian Zigotzky <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
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Just fold the calculation into __phys_to_dma/__dma_to_phys as those are
the only places that should know about it.
Signed-off-by: Christoph Hellwig <[email protected]>
Acked-by: Benjamin Herrenschmidt <[email protected]>
Tested-by: Christian Zigotzky <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
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Now that we've switched all the powerpc nommu and swiotlb methods to
use the generic dma_direct_* calls we can remove these ops vectors
entirely and rely on the common direct mapping bypass that avoids
indirect function calls entirely. This also allows to remove a whole
lot of boilerplate code related to setting up these operations.
Signed-off-by: Christoph Hellwig <[email protected]>
Tested-by: Christian Zigotzky <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
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Switch the streaming DMA mapping and ownership transfer methods to the
functionally identical dma_direct_ versions. Factor the cache
maintainance helpers into the form expected by the common code for that.
Signed-off-by: Christoph Hellwig <[email protected]>
Tested-by: Christian Zigotzky <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
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The generic code allows a few nice things such as node local allocations
and dipping into the CMA area. The lookup of the right zone for a given
dma mask works a little different, but the results should be the same.
Signed-off-by: Christoph Hellwig <[email protected]>
Tested-by: Christian Zigotzky <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
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The only user left is powerpc, but even there the generic dma-direct
version works just as well, given that we guarantee that the swiotlb
buffer must always be addressable.
Signed-off-by: Christoph Hellwig <[email protected]>
Tested-by: Christian Zigotzky <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
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This function is largely identical to the generic version used
everywhere else. Replace it with the generic version.
Signed-off-by: Christoph Hellwig <[email protected]>
Tested-by: Christian Zigotzky <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
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This function is identical to the generic dma_direct_get_required_mask,
except that the generic version also takes the bus_dma_mask account,
which could lead to incorrect results in the powerpc version.
Signed-off-by: Christoph Hellwig <[email protected]>
Tested-by: Christian Zigotzky <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
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The coherent cache version of this function already is functionally
identicall to the default version, and by defining the
arch_dma_coherent_to_pfn hook the same is ture for the noncoherent
version as well.
Signed-off-by: Christoph Hellwig <[email protected]>
Tested-by: Christian Zigotzky <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
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Use the standard portable helper instead of the powerpc specific one,
which is about to go away.
Signed-off-by: Christoph Hellwig <[email protected]>
Acked-by: Benjamin Herrenschmidt <[email protected]>
Tested-by: Christian Zigotzky <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
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Instead of letting the architecture supply all of dma_set_mask just
give it an additional hook selected by Kconfig.
Signed-off-by: Christoph Hellwig <[email protected]>
Tested-by: Christian Zigotzky <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
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We need to compare the last byte in the dma range and not the one after it
for the bus_dma_mask, just like we do for the regular dma_mask. Fix this
cleanly by merging the two comparisms into one.
Signed-off-by: Christoph Hellwig <[email protected]>
Tested-by: Christian Zigotzky <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
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The max_direct_dma_addr duplicates the bus_dma_mask field in struct
device. Use the generic field instead.
Signed-off-by: Christoph Hellwig <[email protected]>
Tested-by: Christian Zigotzky <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
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pci_dma_dev_setup_swiotlb is only used by the fsl_pci code, and closely
related to it, so fsl_pci.c seems like a better place for it.
Signed-off-by: Christoph Hellwig <[email protected]>
Tested-by: Christian Zigotzky <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
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This function is only used by the Cell iommu code, which can keep track
if it is using the iommu internally just as good.
Signed-off-by: Christoph Hellwig <[email protected]>
Tested-by: Christian Zigotzky <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
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All iommu capable platforms now always use the iommu code with the
internal bypass, so there is not need for this magic anymore.
Signed-off-by: Christoph Hellwig <[email protected]>
Tested-by: Christian Zigotzky <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
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Unused now.
Signed-off-by: Christoph Hellwig <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
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The ppc_md and pci_controller_ops methods are unused now and can be
removed. The dma_nommu implementation is generic to the generic one
except for using max_pfn instead of calling into the memblock API,
and all other dma_map_ops instances implement a method of their own.
Signed-off-by: Christoph Hellwig <[email protected]>
Tested-by: Christian Zigotzky <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
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Use the generic iommu bypass code instead of overriding set_dma_mask.
Signed-off-by: Christoph Hellwig <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
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These devices are not PCIe devices and do not have associated dma map
ops, so this is just dead code.
Signed-off-by: Christoph Hellwig <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
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This function is completely bogus - the fact that two PCIe devices come
from the same vendor has absolutely nothing to say about the DMA
capabilities and characteristics.
Signed-off-by: Christoph Hellwig <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
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Use the generic iommu bypass code instead of overriding set_dma_mask.
Signed-off-by: Christoph Hellwig <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
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If dart_init failed we didn't have a chance to setup dma or controller
ops yet, so there is no point in resetting them.
Signed-off-by: Christoph Hellwig <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
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This gets rid of a lot of clumsy code and finally allows us to mark
dma_iommu_ops const.
Includes fixes from Michael Ellerman.
Signed-off-by: Christoph Hellwig <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
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Configure the dma settings at device setup time, and stop playing games
with get_pci_dma_ops. This prepares for using the common dma_configure
code later on.
Includes fixes from Michael Ellerman.
Signed-off-by: Christoph Hellwig <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
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Use the generic iommu bypass code instead of overriding set_dma_mask.
Signed-off-by: Christoph Hellwig <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
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