Presently SMMU registers are located in discontiguous 3 blocks. They
are interleaved by MC registers. Ideally SMMU register blocks should
be in an independent one block, but it is too late to change this H/W
design. In the future Tegra chips over some generations, it is
expected that some of register block "size" can be extended towards
the end and also more new register blocks will be added at most a few
blocks. The starting address of each existing block won't change. This
patch allocates multiple number of register blocks dynamically based
on the info passed from DT. Those ranges are verified in the
accessors{read,write}. This may sacrifice some performance because a
new accessors prevents compiler optimization of a fixed size register
offset calculation. Since SMMU register accesses are not so frequent,
this would be acceptable. This patch is necessary to unify
"tegra-smmu.ko" over some Tegra SoC generations.
Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
Current kernels print this on my Dell server:
------------[ cut here ]------------
WARNING: at drivers/iommu/intel_irq_remapping.c:542
intel_enable_irq_remapping+0x7b/0x27e()
Hardware name: PowerEdge R620
Your BIOS is broken and requested that x2apic be disabled
This will leave your machine vulnerable to irq-injection attacks
Use 'intremap=no_x2apic_optout' to override BIOS request
[...]
Enabled IRQ remapping in xapic mode
x2apic not enabled, IRQ remapping is in xapic mode
This is inconsistent with itself -- interrupt remapping is *on*.
Fix the mess by making the warnings say what they mean and my
making sure that compatibility format interrupts (the dangerous
ones) are disabled if x2apic is present regardless of BIOS
settings.
With this patch applied, the output is:
Your BIOS is broken and requested that x2apic be disabled.
This will slightly decrease performance.
Use 'intremap=no_x2apic_optout' to override BIOS request.
Enabled IRQ remapping in xapic mode
x2apic not enabled, IRQ remapping is in xapic mode
This should make us as or more secure than we are now and
replace a rather scary warning with a much less scary warning on
silly but functional systems.
Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Gleb Natapov <gleb@redhat.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Alex Williamson <alex.williamson@redhat.com>
Link: http://lkml.kernel.org/r/2011b943a886fd7c46079eb10bc24fc130587503.1359759303.git.luto@amacapital.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Pull drm fixes from Dave Airlie:
"Intel, radeon and exynos fixes. Nothing too major or wierd: one dmar
fix and a radeon cursor corruption, along with misc exynos fixes."
* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: (21 commits)
drm/exynos: add check for the device power status
drm/exynos: Make 'drm_hdmi_get_edid' static
drm/exynos: fimd and ipp are broken on multiplatform
drm/exynos: don't include plat/gpio-cfg.h
drm/exynos: Remove "internal" interrupt handling
drm/exynos: Add missing static specifiers in exynos_drm_rotator.c
drm/exynos: Replace mdelay with usleep_range
drm/exynos: Make ipp_handle_cmd_work static
drm/exynos: Make g2d_userptr_get_dma_addr static
drm/exynos: consider DMA_NONE flag to dmabuf import
drm/exynos: free sg object if dma_map_sg is failed
drm/exynos: added validation of edid for vidi connection
drm/exynos: let drm handle edid allocations
drm/radeon: Enable DMA_IB_SWAP_ENABLE on big endian hosts.
drm/radeon: fix a rare case of double kfree
radeon_display: Use pointer return error codes
drm/radeon: fix cursor corruption on DCE6 and newer
drm/i915: dump UTS_RELEASE into the error_state
iommu/intel: disable DMAR for g4x integrated gfx
drm/i915: GFX_MODE Flush TLB Invalidate Mode must be '1' for scanline waits
...
The IOMMU may stop processing page translations due to a perceived lack
of credits for writing upstream peripheral page service request (PPR)
or event logs. If the L2B miscellaneous clock gating feature is enabled
the IOMMU does not properly register credits after the log request has
completed, leading to a potential system hang.
BIOSes are supposed to disable L2B micellaneous clock gating by setting
L2_L2B_CK_GATE_CONTROL[CKGateL2BMiscDisable](D0F2xF4_x90[2]) = 1b. This
patch corrects that for those which do not enable this workaround.
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Acked-by: Borislav Petkov <bp@suse.de>
Cc: stable@vger.kernel.org
Signed-off-by: Joerg Roedel <joro@8bytes.org>
The pointer obj is dereferenced in line 146 and 149 respectively, so it is not
necessary to check null again in line 149 and 175. And I have checked that all
the callers of these two functions guarantee the parameter obj passed is not
null.
Signed-off-by: Cong Ding <dinggnu@gmail.com>
Acked-by: Ohad Ben-Cohen <ohad@wizery.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
The irq_remapped function is only used in IOMMU code after
the last patch. So move its definition there too.
Signed-off-by: Joerg Roedel <joro@8bytes.org>
Acked-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This callback replaces the old __eoi_ioapic_pin function
which needs a special path for interrupt remapping.
Signed-off-by: Joerg Roedel <joro@8bytes.org>
Acked-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This call-back points to the right function for initializing
the msi_msg structure. The old code for msi_msg generation
was split up into the irq-remapped and the default case.
The irq-remapped case just calls into the specific Intel or
AMD implementation when the device is behind an IOMMU.
Otherwise the default function is called.
Signed-off-by: Joerg Roedel <joro@8bytes.org>
Acked-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This function does irq-remapping specific interrupt setup
like modifying the chip defaults.
Signed-off-by: Joerg Roedel <joro@8bytes.org>
Acked-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
The function is called unconditionally now in IO-APIC code
removing another irq_remapped() check from x86 core code.
Signed-off-by: Joerg Roedel <joro@8bytes.org>
Acked-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Move all the code to either to the header file
asm/irq_remapping.h or to drivers/iommu/.
Signed-off-by: Joerg Roedel <joro@8bytes.org>
Acked-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Remove the last left-over from this flag from x86 code.
Signed-off-by: Joerg Roedel <joro@8bytes.org>
Acked-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Move these checks to IRQ remapping code by introducing the
panic_on_irq_remap() function.
Signed-off-by: Joerg Roedel <joro@8bytes.org>
Acked-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This pointer is changed to a different function when IRQ
remapping is enabled.
Signed-off-by: Joerg Roedel <joro@8bytes.org>
Acked-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
With interrupt remapping a special function is used to
change the affinity of an IO-APIC interrupt. Abstract this
with a function pointer.
Signed-off-by: Joerg Roedel <joro@8bytes.org>
Acked-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Use seperate routines to setup MSI IRQs for both
irq_remapping_enabled cases.
Signed-off-by: Joerg Roedel <joro@8bytes.org>
Acked-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This function pointer can be overwritten by the IRQ
remapping code. The irq_remapping_enabled check can be
removed from default_setup_hpet_msi.
Signed-off-by: Joerg Roedel <joro@8bytes.org>
Acked-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This call-back is used to dump IO-APIC entries for debugging
purposes into the kernel log. VT-d needs a special routine
for this and will overwrite the default.
Signed-off-by: Joerg Roedel <joro@8bytes.org>
Acked-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This function pointer is used to call a system-specific
function for disabling the IO-APIC. Currently this is used
for IRQ remapping which has its own disable routine.
Also introduce the necessary infrastructure in the interrupt
remapping code to overwrite this and other function pointers
as necessary by interrupt remapping.
Signed-off-by: Joerg Roedel <joro@8bytes.org>
Acked-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Move the three easy to move checks in the x86' apic.c file
into the IRQ-remapping code.
Signed-off-by: Joerg Roedel <joro@8bytes.org>
Acked-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Convert all uses of devm_request_and_ioremap() to the newly introduced
devm_ioremap_resource() which provides more consistent error handling.
devm_ioremap_resource() provides its own error messages so all explicit
error messages can be removed from the failure code paths.
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Cc: Joerg Roedel <joro@8bytes.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
DMAR support on g4x/gm45 integrated gpus seems to be totally busted.
So don't bother, but instead disable it by default to allow distros to
unconditionally enable DMAR support.
v2: Actually wire up the right quirk entry, spotted by Adam Jackson.
Note that according to intel marketing materials only g45 and gm45
support DMAR/VT-d. So we have reports for all relevant gen4 pci ids by
now. Still, keep all the other gen4 ids in the quirk table in case the
marketing stuff confused me again, which would not be the first time.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=51921
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=538163
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=538163
Cc: Adam Jackson <ajax@redhat.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: stable@vger.kernel.org
Acked-By: David Woodhouse <David.Woodhouse@intel.com>
Tested-by: stathis <stathis@npcglib.org>
Tested-by: Mihai Moldovan <ionic@ionic.de>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
The CONFIG_EXPERIMENTAL config item has not carried much meaning for a
while now and is almost always enabled by default. As agreed during the
Linux kernel summit, remove it from any "depends on" lines in Kconfigs.
CC: Joerg Roedel <joerg.roedel@amd.com>
CC: Hiroshi DOYU <hdoyu@nvidia.com>
CC: Jiri Kosina <jkosina@suse.cz>
CC: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The iommu_init() initializes IOMMU internal structures and data
required for the IOMMU API as iommu_group_alloc().
It is registered as a subsys_initcall now.
One of the IOMMU users is going to be a PCI subsystem on POWER.
It discovers new IOMMU tables during the PCI scan so the logical
place to call iommu_group_alloc() is the moment when a new group
is discovered. However PCI scan is done from subsys_initcall hook
as IOMMU does so PCI hook can be (and is) called before the IOMMU one.
The patch moves IOMMU subsystem initialization one step earlier
to make sure that IOMMU is initialized before PCI scan begins.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
CONFIG_HOTPLUG is going away as an option. As a result, the __dev*
markings need to be removed.
This change removes the use of __devinit, __devexit_p, __devinitdata,
and __devexit from these drivers.
Based on patches originally written by Bill Pemberton, but redone by me
in order to handle some of the coding style issues better, by hand.
Cc: Bill Pemberton <wfp5p@virginia.edu>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Ohad Ben-Cohen <ohad@wizery.com>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Omar Ramirez Luna <omar.luna@linaro.org>
Cc: Mauro Carvalho Chehab <mchehab@redhat.com>
Cc: Hiroshi Doyu <hdoyu@nvidia.com>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Cc: Bharat Nihalani <bnihalani@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
A few new features this merge-window. The most important one is
probably, that dma-debug now warns if a dma-handle is not checked with
dma_mapping_error by the device driver. This requires minor changes to
some architectures which make use of dma-debug. Most of these changes
have the respective Acks by the Arch-Maintainers.
Besides that there are updates to the AMD IOMMU driver for refactor the
IOMMU-Groups support and to make sure it does not trigger a hardware
erratum.
The OMAP changes (for which I pulled in a branch from Tony Lindgren's
tree) have a conflict in linux-next with the arm-soc tree. The conflict
is in the file arch/arm/mach-omap2/clock44xx_data.c which is deleted in
the arm-soc tree. It is safe to delete the file too so solve the
conflict. Similar changes are done in the arm-soc tree in the common
clock framework migration. A missing hunk from the patch in the IOMMU
tree will be submitted as a seperate patch when the merge-window is
closed.
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Merge tag 'iommu-updates-v3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull IOMMU updates from Joerg Roedel:
"A few new features this merge-window. The most important one is
probably, that dma-debug now warns if a dma-handle is not checked with
dma_mapping_error by the device driver. This requires minor changes
to some architectures which make use of dma-debug. Most of these
changes have the respective Acks by the Arch-Maintainers.
Besides that there are updates to the AMD IOMMU driver for refactor
the IOMMU-Groups support and to make sure it does not trigger a
hardware erratum.
The OMAP changes (for which I pulled in a branch from Tony Lindgren's
tree) have a conflict in linux-next with the arm-soc tree. The
conflict is in the file arch/arm/mach-omap2/clock44xx_data.c which is
deleted in the arm-soc tree. It is safe to delete the file too so
solve the conflict. Similar changes are done in the arm-soc tree in
the common clock framework migration. A missing hunk from the patch
in the IOMMU tree will be submitted as a seperate patch when the
merge-window is closed."
* tag 'iommu-updates-v3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (29 commits)
ARM: dma-mapping: support debug_dma_mapping_error
ARM: OMAP4: hwmod data: ipu and dsp to use parent clocks instead of leaf clocks
iommu/omap: Adapt to runtime pm
iommu/omap: Migrate to hwmod framework
iommu/omap: Keep mmu enabled when requested
iommu/omap: Remove redundant clock handling on ISR
iommu/amd: Remove obsolete comment
iommu/amd: Don't use 512GB pages
iommu/tegra: smmu: Move bus_set_iommu after probe for multi arch
iommu/tegra: gart: Move bus_set_iommu after probe for multi arch
iommu/tegra: smmu: Remove unnecessary PTC/TLB flush all
tile: dma_debug: add debug_dma_mapping_error support
sh: dma_debug: add debug_dma_mapping_error support
powerpc: dma_debug: add debug_dma_mapping_error support
mips: dma_debug: add debug_dma_mapping_error support
microblaze: dma-mapping: support debug_dma_mapping_error
ia64: dma_debug: add debug_dma_mapping_error support
c6x: dma_debug: add debug_dma_mapping_error support
ARM64: dma_debug: add debug_dma_mapping_error support
intel-iommu: Prevent devices with RMRRs from being placed into SI Domain
...
The dma_pte_free_pagetable() function will only free a page table page
if it is asked to free the *entire* 2MiB range that it covers. So if a
page table page was used for one or more small mappings, it's likely to
end up still present in the page tables... but with no valid PTEs.
This was fine when we'd only be repopulating it with 4KiB PTEs anyway
but the same virtual address range can end up being reused for a
*large-page* mapping. And in that case were were trying to insert the
large page into the second-level page table, and getting a complaint
from the sanity check in __domain_mapping() because there was already a
corresponding entry. This was *relatively* harmless; it led to a memory
leak of the old page table page, but no other ill-effects.
Fix it by calling dma_pte_clear_range (hopefully redundant) and
dma_pte_free_pagetable() before setting up the new large page.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Tested-by: Ravi Murty <Ravi.Murty@intel.com>
Tested-by: Sudeep Dutt <sudeep.dutt@intel.com>
Cc: stable@kernel.org [3.0+]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Use runtime PM functionality interfaced with hwmod enable/idle
functions, to replace direct clock operations and sysconfig
handling.
Due to reset sequence, pm_runtime_[get|put]_sync must be used, to
avoid possible operations with the module under reset. Because of
this and given that the driver uses spin_locks to protect their
critical sections, we must use pm_runtime_irq_safe in order for the
runtime ops to be happy, otherwise might_sleep_if checks in runtime
framework will complain.
The remaining pm_runtime out of iommu_enable and iommu_disable
corresponds to paths that can be accessed through debugfs, some of
them doesn't work if the module is not enabled first, but in future
if the mmu is idled withouth freeing, these are needed to debug.
Signed-off-by: Omar Ramirez Luna <omar.luna@linaro.org>
Tested-by: Ohad Ben-Cohen <ohad@wizery.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
Use hwmod data and device attributes to build and register an
omap device for iommu driver.
- Update the naming convention in isp module.
- Remove unneeded check for number of resources, as this is now
handled by omap_device and prevents driver from loading.
- Now unused, remove platform device and resource data, handling
of sysconfig register for softreset purposes, use default
latency structure.
- Use hwmod API for reset handling.
Signed-off-by: Omar Ramirez Luna <omar.luna@linaro.org>
Tested-by: Ohad Ben-Cohen <ohad@wizery.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
The purpose of the mmu is to handle the memory accesses requested by
its users. Typically, the mmu is bundled with the processing unit in
a single IP block, which makes them to share the same clock to be
functional.
Currently, iommu code assumes that its user will be indirectly
clocking it, but being a separate mmu driver, it should handle
its own clocks, so as long as the mmu is requested it will be
powered ON and once detached it will be powered OFF.
The remaining clock handling out of iommu_enable and iommu_disable
corresponds to paths that can be accessed through debugfs, some of
them doesn't work if the module is not enabled first, but in future
if the mmu is idled withouth freeing, these are needed to debug.
Signed-off-by: Omar Ramirez Luna <omar.luna@linaro.org>
Tested-by: Ohad Ben-Cohen <ohad@wizery.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
For the interrupt to be generated, the mmu clock should be already
enabled while translating a virtual address, so, this call to clock
handling is just increasing/decreasing the counter.
This works now, because its users need the same clock and they
indirectly power the mmu, in this interrupt context the handling of
clocks inside the ISR doesn't seem to be needed nor helping.
Next patch should also correct the dependency on clients to handle
iommu clocks.
Signed-off-by: Omar Ramirez Luna <omar.luna@linaro.org>
Tested-by: Ohad Ben-Cohen <ohad@wizery.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
The AMD IOMMU driver only uses the page-sizes it gets from
IOMMU core and uses the appropriate page-size. So this
comment is not necessary.
Signed-off-by: Joerg Roedel <joro@8bytes.org>
There is a bug in the hardware that will be triggered when
this page size is used. Make sure this does not happen.
Signed-off-by: Joerg Roedel <joro@8bytes.org>
This is needed for the multiplatform kernels as the plat
and mach headers cannot be included.
These changes were agreed to be merged via the arm-soc
tree by Joerg and Ohad as these will cause some merge
conflicts with the other related clean-up branches.
So omap-for-v3.8/cleanup-headers-iommu should be added
as one of the depends branches for arm-soc.
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Merge tag 'omap-for-v3.8/cleanup-headers-iommu-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into next/cleanup
From Tony Lindgren:
Move most of remaining omap iommu code to drivers/iommu.
This is needed for the multiplatform kernels as the plat
and mach headers cannot be included.
These changes were agreed to be merged via the arm-soc
tree by Joerg and Ohad as these will cause some merge
conflicts with the other related clean-up branches.
So omap-for-v3.8/cleanup-headers-iommu should be added
as one of the depends branches for arm-soc.
* tag 'omap-for-v3.8/cleanup-headers-iommu-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
ARM: OMAP2+: Move iommu/iovmm headers to platform_data
ARM: OMAP2+: Make some definitions local
ARM: OMAP2+: Move iommu2 to drivers/iommu/omap-iommu2.c
ARM: OMAP2+: Move plat/iovmm.h to include/linux/omap-iommu.h
ARM: OMAP2+: Move iopgtable header to drivers/iommu/
ARM: OMAP: Merge iommu2.h into iommu.h
Conflicts due to surrounding changes fixed up in:
arch/arm/mach-omap2/omap_hwmod_44xx_data.c
drivers/media/platform/omap3isp/ispvideo.c
Signed-off-by: Olof Johansson <olof@lixom.net>
For a single image to support multiple SoCs(GART/SMMU).
Reported-by: Arto Merilainen <amerilainen@nvidia.com>
Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
For a single image to support multiple SoCs(GART/SMMU).
Reported-by: Arto Merilainen <amerilainen@nvidia.com>
Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
smmu_flush_regs() does TLB/PTC flush all when freeing a second level
page table. This isn't necessay at all since each pte entry has been
already maintained by address in the above flush_ptc_and_tlb().
Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
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Merge tag 'v3.7-rc7' into next/cleanup
Merging in mainline back to next/cleanup since it has collected a few
conflicts between fixes going upstream and some of the cleanup patches.
Git doesn't auto-resolve some of them, and they're mostly noise so let's
take care of it locally.
Conflicts are in:
arch/arm/mach-omap2/omap_hwmod_44xx_data.c
arch/arm/plat-omap/i2c.c
drivers/video/omap2/dss/dss.c
Signed-off-by: Olof Johansson <olof@lixom.net>
This patch is to prevent non-USB devices that have RMRRs associated with them from
being placed into the SI Domain during init. This fixes the issue where the RMRR info
for devices being placed in and out of the SI Domain gets lost.
Signed-off-by: Thomas Mingarelli <thomas.mingarelli@hp.com>
Tested-by: Shuah Khan <shuah.khan@hp.com>
Reviewed-by: Donald Dutile <ddutile@redhat.com>
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
Move iommu/iovmm headers from plat/ to platform_data/ as part of the
single zImage work.
Partially based on an earlier version by Ido Yariv <ido@wizery.com>.
Cc: Ido Yariv <ido@wizery.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Omar Ramirez Luna <omar.luna@linaro.org>
Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Acked-by: Ohad Ben-Cohen <ohad@wizery.com>
Acked-by: Joerg Roedel <joro@8bytes.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Move some of the definitions in omap-iommu.h that can be made local to
either drivers/iommu.
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
Cc: Omar Ramirez Luna <omar.luna@linaro.org>
Signed-off-by: Ido Yariv <ido@wizery.com>
Acked-by: Ohad Ben-Cohen <ohad@wizery.com>
Acked-by: Joerg Roedel <joro@8bytes.org>
[tony@atomide.com: updated for header changes in the series]
Signed-off-by: Tony Lindgren <tony@atomide.com>
This file should not be in arch/arm. Move it to drivers/iommu
to allow making most of the header local to drivers/iommu.
This is needed as we are removing plat and mach includes
from drivers for ARM common zImage support.
Cc: Ido Yariv <ido@wizery.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
Cc: Omar Ramirez Luna <omar.luna@linaro.org>
Cc: linux-media@vger.kernel.org
Acked-by: Ohad Ben-Cohen <ohad@wizery.com>
Acked-by: Joerg Roedel <joro@8bytes.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Looks like the iommu framework does not have generic functions
exported for all the needs yet. The hardware specific functions
are defined in files like intel-iommu.h and amd-iommu.h. Follow
the same standard for omap-iommu.h.
This is needed because we are removing plat and mach includes
for ARM common zImage support. Further work should continue
in the iommu framework context as only pure platform data will
be communicated from arch/arm/*omap*/* code to the iommu
framework.
Cc: Ido Yariv <ido@wizery.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Omar Ramirez Luna <omar.luna@linaro.org>
Cc: linux-media@vger.kernel.org
Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Acked-by: Ohad Ben-Cohen <ohad@wizery.com>
Acked-by: Joerg Roedel <joro@8bytes.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
The iopgtable header file is only used by the iommu & iovmm drivers, so
move it to drivers/iommu/, as part of the single zImage effort.
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
Cc: Omar Ramirez Luna <omar.luna@linaro.org>
Signed-off-by: Ido Yariv <ido@wizery.com>
Acked-by: Ohad Ben-Cohen <ohad@wizery.com>
Acked-by: Joerg Roedel <joro@8bytes.org>
[tony@atomide.com: updated to be earlier in the series]
Signed-off-by: Tony Lindgren <tony@atomide.com>
We can't assume this device exists, fall back to the bridge itself.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Tested-by: Matthew Thode <prometheanfire@gentoo.org>
Cc: stable@vger.kernel.org
Signed-off-by: Joerg Roedel <joro@8bytes.org>
We wish to empty arch/arm/mach-tegra/include/mach/ as much as possible
to enable single zImage. Move tegra-ahb.h to a more central location
(suggested by Arnd, OK'd by Greg KH), and actually make tegra-ahb.c
include the header to ensure client and provider agree on the prototype.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Nothing from this file is used, and the file will hopefully be deleted
soon.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Joerg Roedel <joerg.roedel@amd.com>
An alias doesn't always point to a physical device. When this
happens we must first verify that the IOMMU group isn't rooted in
a device above the alias. In this case the alias is effectively
just another quirk for the devices aliased to it. Alternatively,
the virtual alias itself may be the root of the IOMMU group. To
support this, allow a group to be hosted on the alias dev_data
for use by anything that might have the same alias.
Signed-off-by: Alex williamson <alex.williamson@redhat.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Add a WARN_ON to make it clear why we don't add dma_pdev->dev to the
group we're allocating.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This needs to be broken apart, start with pulling all the IOMMU
group init code into a new function.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
On some systems the BIOS puts the wrong device-id for the
IO-APIC into the IVRS table. The result is that interrupt
remapping is not working for the IO-APIC irqs. This usually
means a kernel panic at boot because the timer is not
working.
Fix this kernel panic by disabling interrupt remapping if
this problem is discovered in the IVRS table.
Reported-by: Andrew Oakley <andrew@ado.is-a-geek.net>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This time the IOMMU updates contain a bunch of fixes and cleanups to
various IOMMU drivers and the DMA debug code. New features are the
code for IRQ remapping support with the AMD IOMMU (preperation for that
was already merged in the last release) and a debugfs interface to
export some statistics in the NVidia Tegra IOMMU driver.
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Merge tag 'iommu-updates-v3.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull IOMMU updates from Joerg Roedel:
"This time the IOMMU updates contain a bunch of fixes and cleanups to
various IOMMU drivers and the DMA debug code. New features are the
code for IRQ remapping support with the AMD IOMMU (preperation for
that was already merged in the last release) and a debugfs interface
to export some statistics in the NVidia Tegra IOMMU driver."
* tag 'iommu-updates-v3.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (27 commits)
iommu/amd: Remove obsolete comment line
dma-debug: Remove local BUS_NOTIFY_UNBOUND_DRIVER define
iommu/amd: Fix possible use after free in get_irq_table()
iommu/amd: Report irq remapping through IOMMU-API
iommu/amd: Print message to system log when irq remapping is enabled
iommu/irq: Use amd_iommu_irq_ops if supported
iommu/amd: Make sure irq remapping still works on dma init failure
iommu/amd: Add initialization routines for AMD interrupt remapping
iommu/amd: Add call-back routine for HPET MSI
iommu/amd: Implement MSI routines for interrupt remapping
iommu/amd: Add IOAPIC remapping routines
iommu/amd: Add routines to manage irq remapping tables
iommu/amd: Add IRTE invalidation routine
iommu/amd: Make sure IOMMU is not considered to translate itself
iommu/amd: Split device table initialization into irq and dma part
iommu/amd: Check if IOAPIC information is correct
iommu/amd: Allocate data structures to keep track of irq remapping tables
iommu/amd: Add slab-cache for irq remapping tables
iommu/amd: Keep track of HPET and IOAPIC device ids
iommu/amd: Fix features reporting
...
We should return NULL on error instead of the freed pointer.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Host bridge hotplug
- Protect acpi_pci_drivers and acpi_pci_roots (Taku Izumi)
- Clear host bridge resource info to avoid issue when releasing (Yinghai Lu)
- Notify acpi_pci_drivers when hot-plugging host bridges (Jiang Liu)
- Use standard list ops for acpi_pci_drivers (Jiang Liu)
Device hotplug
- Use pci_get_domain_bus_and_slot() to close hotplug races (Jiang Liu)
- Remove fakephp driver (Bjorn Helgaas)
- Fix VGA ref count in hotplug remove path (Yinghai Lu)
- Allow acpiphp to handle PCIe ports without native hotplug (Jiang Liu)
- Implement resume regardless of pciehp_force param (Oliver Neukum)
- Make pci_fixup_irqs() work after init (Thierry Reding)
Miscellaneous
- Add pci_pcie_type(dev) and remove pci_dev.pcie_type (Yijing Wang)
- Factor out PCI Express Capability accessors (Jiang Liu)
- Add pcibios_window_alignment() so powerpc EEH can use generic resource assignment (Gavin Shan)
- Make pci_error_handlers const (Stephen Hemminger)
- Cleanup drivers/pci/remove.c (Bjorn Helgaas)
- Improve Vendor-Specific Extended Capability support (Bjorn Helgaas)
- Use standard list ops for bus->devices (Bjorn Helgaas)
- Avoid kmalloc in pci_get_subsys() and pci_get_class() (Feng Tang)
- Reassign invalid bus number ranges (Intel DP43BF workaround) (Yinghai Lu)
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Merge tag 'for-3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull PCI changes from Bjorn Helgaas:
"Host bridge hotplug
- Protect acpi_pci_drivers and acpi_pci_roots (Taku Izumi)
- Clear host bridge resource info to avoid issue when releasing
(Yinghai Lu)
- Notify acpi_pci_drivers when hot-plugging host bridges (Jiang Liu)
- Use standard list ops for acpi_pci_drivers (Jiang Liu)
Device hotplug
- Use pci_get_domain_bus_and_slot() to close hotplug races (Jiang
Liu)
- Remove fakephp driver (Bjorn Helgaas)
- Fix VGA ref count in hotplug remove path (Yinghai Lu)
- Allow acpiphp to handle PCIe ports without native hotplug (Jiang
Liu)
- Implement resume regardless of pciehp_force param (Oliver Neukum)
- Make pci_fixup_irqs() work after init (Thierry Reding)
Miscellaneous
- Add pci_pcie_type(dev) and remove pci_dev.pcie_type (Yijing Wang)
- Factor out PCI Express Capability accessors (Jiang Liu)
- Add pcibios_window_alignment() so powerpc EEH can use generic
resource assignment (Gavin Shan)
- Make pci_error_handlers const (Stephen Hemminger)
- Cleanup drivers/pci/remove.c (Bjorn Helgaas)
- Improve Vendor-Specific Extended Capability support (Bjorn
Helgaas)
- Use standard list ops for bus->devices (Bjorn Helgaas)
- Avoid kmalloc in pci_get_subsys() and pci_get_class() (Feng Tang)
- Reassign invalid bus number ranges (Intel DP43BF workaround)
(Yinghai Lu)"
* tag 'for-3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (102 commits)
PCI: acpiphp: Handle PCIe ports without native hotplug capability
PCI/ACPI: Use acpi_driver_data() rather than searching acpi_pci_roots
PCI/ACPI: Protect acpi_pci_roots list with mutex
PCI/ACPI: Use acpi_pci_root info rather than looking it up again
PCI/ACPI: Pass acpi_pci_root to acpi_pci_drivers' add/remove interface
PCI/ACPI: Protect acpi_pci_drivers list with mutex
PCI/ACPI: Notify acpi_pci_drivers when hot-plugging PCI root bridges
PCI/ACPI: Use normal list for struct acpi_pci_driver
PCI/ACPI: Use DEVICE_ACPI_HANDLE rather than searching acpi_pci_roots
PCI: Fix default vga ref_count
ia64/PCI: Clear host bridge aperture struct resource
x86/PCI: Clear host bridge aperture struct resource
PCI: Stop all children first, before removing all children
Revert "PCI: Use hotplug-safe pci_get_domain_bus_and_slot()"
PCI: Provide a default pcibios_update_irq()
PCI: Discard __init annotations for pci_fixup_irqs() and related functions
PCI: Use correct type when freeing bus resource list
PCI: Check P2P bridge for invalid secondary/subordinate range
PCI: Convert "new_id"/"remove_id" into generic pci_bus driver attributes
xen-pcifront: Use hotplug-safe pci_get_domain_bus_and_slot()
...
Report the availability of irq remapping through the
IOMMU-API to allow KVM device passthrough again without
additional module parameter overrides.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Do not deinitialize the AMD IOMMU driver completly when
interrupt remapping is already in use but the initialization
of the DMA layer fails for some reason. Make sure the IOMMU
can still be used to remap interrupts.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Add the six routines required to setup interrupt remapping
with the AMD IOMMU. Also put it all together into the AMD
specific irq_remap_ops.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Add the routine to setup interrupt remapping for ioapic
interrupts. Also add a routine to change the affinity of an
irq and to free an irq allocation for interrupt remapping.
The last two functions will also be used for MSI interrupts.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Add routines to:
* Alloc remapping tables and single entries from these
tables
* Change entries in the tables
* Free entries in the table
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Add routine to invalidate the IOMMU cache for interupt
translations. Also include the IRTE caches when flushing all
IOMMU caches.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
The IVRS table usually includes the IOMMU device. But the
IOMMU does never translate itself, so make sure the IOMMU
driver knows this.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
When the IOMMU is enabled very early (as with irq-remapping)
some devices are still in BIOS hand. When dma is blocked
early this can cause lots of IO_PAGE_FAULTs. So delay the
DMA initialization and do it right before the dma_ops are
initialized.
To be secure, block all interrupts by default when irq-remapping is
enabled in the system. They will be reenabled on demand
later. Without blocking interrupts by default devices can
issue arbitrary interrupts by sending special DMA packets to
the CPU that look like MSI messages. This is especially
dangerous when a device is assigned to a KVM guest because
the guest can then DoS the host.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
When the IOAPIC information provided in the IVRS table is
not correct or not complete the system may not boot at all
when interrupt remapping is enabled. So check if this
information is correct and print out a firmware bug message
when it is not.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
The irq remapping tables for the AMD IOMMU need to be
aligned on a 128 byte boundary. Create a seperate slab-cache
to guarantee this alignment.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
The IVRS ACPI table provides information about the IOAPICs
and the HPETs available in the system and which PCI device
ID they use in transactions. Save that information for later
usage in interrupt remapping.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
When the AMD IOMMU doesn't have extended features, an empty line
gets issued in dmesg like so:
[ 3.061417] AMD-Vi: Found IOMMU at 0000:00:00.2 cap 0x40
[ 3.066757] <---
[ 3.068294] pci 0000:00:00.2: irq 72 for MSI/MSI-X
[ 3.081213] AMD-Vi: Lazy IO/TLB flushing enabled
Fix it.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
The new IOMMU groups code in the AMD IOMMU driver makes the
assumption that there is a pci_dev struct available for all
device-ids listed in the IVRS ACPI table. Unfortunatly this
assumption is not true and so this code causes a NULL
pointer dereference at boot on some systems.
Fix it by making sure the given pointer is never NULL when
passed to the group specific code. The real fix is larger
and will be queued for v3.7.
Reported-by: Florian Dazinger <florian@dazinger.net>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
domain_update_iommu_coherency() currently defaults to setting domains
as coherent when the domain is not attached to any iommus. This
allows for a window in domain_context_mapping_one() where such a
domain can update context entries non-coherently, and only after
update the domain capability to clear iommu_coherency.
This can be seen using KVM device assignment on VT-d systems that
do not support coherency in the ecap register. When a device is
added to a guest, a domain is created (iommu_coherency = 0), the
device is attached, and ranges are mapped. If we then hot unplug
the device, the coherency is updated and set to the default (1)
since no iommus are attached to the domain. A subsequent attach
of a device makes use of the same dmar domain (now marked coherent)
updates context entries with coherency enabled, and only disables
coherency as the last step in the process.
To fix this, switch domain_update_iommu_coherency() to use the
safer, non-coherent default for domains not attached to iommus.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Tested-by: Donald Dutile <ddutile@redhat.com>
Acked-by: Donald Dutile <ddutile@redhat.com>
Acked-by: Chris Wright <chrisw@sous-sol.org>
Cc: stable@vger.kernel.org
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Using list_del_init() instead of list_del() + INIT_LIST_HEAD().
spatch with a semantic match is used to found this problem.
(http://coccinelle.lip6.fr/)
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
There's no need to place these defines into arch/arm/mach-tegra/include/.
Move them into the SMMU driver to clean up mach-tegra, as a pre-requisite
for single-zImage.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Cc: Hiroshi Doyu <hdoyu@nvidia.com>
Acked-by: Hiroshi Doyu <hdoyu@nvidia.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
The commit c3b1a35 "debugfs: make sure that debugfs_create_file() gets
used only for regulars" doesn't allow to use debugfs_create_file() for
dir. Keep debugfs data in smmu_device instead of directory's i_private.
Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Fix some typos in comments and user-visible messages. No
functional changes.
Signed-off-by: Frank Arnold <frank.arnold@amd.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
* commit 'v3.6-rc5': (1098 commits)
Linux 3.6-rc5
HID: tpkbd: work even if the new Lenovo Keyboard driver is not configured
Remove user-triggerable BUG from mpol_to_str
xen/pciback: Fix proper FLR steps.
uml: fix compile error in deliver_alarm()
dj: memory scribble in logi_dj
Fix order of arguments to compat_put_time[spec|val]
xen: Use correct masking in xen_swiotlb_alloc_coherent.
xen: fix logical error in tlb flushing
xen/p2m: Fix one-off error in checking the P2M tree directory.
powerpc: Don't use __put_user() in patch_instruction
powerpc: Make sure IPI handlers see data written by IPI senders
powerpc: Restore correct DSCR in context switch
powerpc: Fix DSCR inheritance in copy_thread()
powerpc: Keep thread.dscr and thread.dscr_inherit in sync
powerpc: Update DSCR on all CPUs when writing sysfs dscr_default
powerpc/powernv: Always go into nap mode when CPU is offline
powerpc: Give hypervisor decrementer interrupts their own handler
powerpc/vphn: Fix arch_update_cpu_topology() return value
ARM: gemini: fix the gemini build
...
Conflicts:
drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
drivers/rapidio/devices/tsi721.c
Introduce an inline function pci_pcie_type(dev) to extract PCIe
device type from pci_dev->pcie_flags_reg field, and prepare for
removing pci_dev->pcie_type.
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
The ACPI tables in the Macbook Air 5,1 define a single IOAPIC with id 2,
but the only remapping unit described in the DMAR table matches id 0.
Interrupt remapping fails as a result, and the kernel panics with the
message "timer doesn't work through Interrupt-remapped IO-APIC."
To fix this, check each IOAPIC for a corresponding IOMMU. If an IOMMU is
not found, do not allow IRQ remapping to be enabled.
v2: Move check to parse_ioapics_under_ir(), raise log level to KERN_ERR,
and add FW_BUG to the log message
v3: Skip check if IOMMU doesn't support interrupt remapping and remove
existing check that the IOMMU count equals the IOAPIC count
Acked-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
SR-IOV can create buses without a bridge. There may be other cases
where this happens as well. In these cases skip to the parent bus
and continue testing devices there.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
SR-IOV can create buses without a bridge. There may be other cases
where this happens as well. In these cases skip to the parent bus
and continue testing devices there.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Tested-by: David Ahern <dsahern@gmail.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
The pci_request_acs() function needs to be called before PCI
probing to be effective. So move it to another call-place to
ensure that.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Fixes the following build error introduced by commit 3177bb76a8
("iommu/exynos: Implement DOMAIN_ATTR_GEOMETRY attribute"):
drivers/iommu/exynos-iommu.c: In function ‘exynos_iommu_domain_init’:
drivers/iommu/exynos-iommu.c:735:2: error: ‘dom’ undeclared
(first use in this function)
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
err initial value should be -EAGAIN. Otherwise 2nd iteration always
fails in the case as[0] is occupied.
Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Add missing free_domain_mem on failure path after alloc_domain.
A simplified version of the semantic match that finds this
problem is as follows: (http://coccinelle.lip6.fr/)
// <smpl>
@km exists@
local idexpression e;
expression e1,e2,e3;
type T,T1;
identifier f;
@@
* e = alloc_domain(...)
... when any
when != e = e1
when != e1 = (T)e
when != e1(...,(T)e,...)
when != &e->f
if(...) { ... when != e2(...,(T1)e,...)
when != e3 = e
when forall
(
return <+...e...+>;
|
* return ...;
) }
// </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
If list_for_each_entry, etc complete a traversal of the
list, the iterator variable ends up pointing to an address
at an offset from the list head, and not a meaningful
structure. Thus this value should not be used after the end
of the iterator. Replace c->dev by dev, which is the value
that c->dev has been compared to.
This problem was found using Coccinelle (http://coccinelle.lip6.fr/).
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Acked-by: Hiroshi DOYU <hdoyu@nvidia.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
The most important part of these updates is the IOMMU groups code
enhancement written by Alex Williamson. It abstracts the problem that a
given hardware IOMMU can't isolate any given device from any other
device (e.g. 32 bit PCI devices can't usually be isolated). Devices that
can't be isolated are grouped together. This code is required for the
upcoming VFIO framework.
Another IOMMU-API change written by be is the introduction of domain
attributes. This makes it easier to handle GART-like IOMMUs with the
IOMMU-API because now the start-address and the size of the domain
address space can be queried.
Besides that there are a few cleanups and fixes for the NVidia Tegra
IOMMU drivers and the reworked init-code for the AMD IOMMU. The later is
from my patch-set to support interrupt remapping. The rest of this
patch-set requires x86 changes which are not mergabe yet. So full
support for interrupt remapping with AMD IOMMUs will come in a future
merge window.
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Merge tag 'iommu-updates-v3.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull IOMMU updates from Joerg Roedel:
"The most important part of these updates is the IOMMU groups code
enhancement written by Alex Williamson. It abstracts the problem that
a given hardware IOMMU can't isolate any given device from any other
device (e.g. 32 bit PCI devices can't usually be isolated). Devices
that can't be isolated are grouped together. This code is required
for the upcoming VFIO framework.
Another IOMMU-API change written by me is the introduction of domain
attributes. This makes it easier to handle GART-like IOMMUs with the
IOMMU-API because now the start-address and the size of the domain
address space can be queried.
Besides that there are a few cleanups and fixes for the NVidia Tegra
IOMMU drivers and the reworked init-code for the AMD IOMMU. The
latter is from my patch-set to support interrupt remapping. The rest
of this patch-set requires x86 changes which are not mergabe yet. So
full support for interrupt remapping with AMD IOMMUs will come in a
future merge window."
* tag 'iommu-updates-v3.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (33 commits)
iommu/amd: Fix hotplug with iommu=pt
iommu/amd: Add missing spin_lock initialization
iommu/amd: Convert iommu initialization to state machine
iommu/amd: Introduce amd_iommu_init_dma routine
iommu/amd: Move unmap_flush message to amd_iommu_init_dma_ops()
iommu/amd: Split enable_iommus() routine
iommu/amd: Introduce early_amd_iommu_init routine
iommu/amd: Move informational prinks out of iommu_enable
iommu/amd: Split out PCI related parts of IOMMU initialization
iommu/amd: Use acpi_get_table instead of acpi_table_parse
iommu/amd: Fix sparse warnings
iommu/tegra: Don't call alloc_pdir with as->lock
iommu/tegra: smmu: Fix unsleepable memory allocation at alloc_pdir()
iommu/tegra: smmu: Remove unnecessary sanity check at alloc_pdir()
iommu/exynos: Implement DOMAIN_ATTR_GEOMETRY attribute
iommu/tegra: Implement DOMAIN_ATTR_GEOMETRY attribute
iommu/msm: Implement DOMAIN_ATTR_GEOMETRY attribute
iommu/omap: Implement DOMAIN_ATTR_GEOMETRY attribute
iommu/vt-d: Implement DOMAIN_ATTR_GEOMETRY attribute
iommu/amd: Implement DOMAIN_ATTR_GEOMETRY attribute
...
Host bridge hotplug
- Add MMCONFIG support for hot-added host bridges (Jiang Liu)
Device hotplug
- Move fixups from __init to __devinit (Sebastian Andrzej Siewior)
- Call FINAL fixups for hot-added devices, too (Myron Stowe)
- Factor out generic code for P2P bridge hot-add (Yinghai Lu)
- Remove all functions in a slot, not just those with _EJx (Amos Kong)
Dynamic resource management
- Track bus number allocation (struct resource tree per domain) (Yinghai Lu)
- Make P2P bridge 1K I/O windows work with resource reassignment (Bjorn Helgaas, Yinghai Lu)
- Disable decoding while updating 64-bit BARs (Bjorn Helgaas)
Power management
- Add PCIe runtime D3cold support (Huang Ying)
Virtualization
- Add VFIO infrastructure (ACS, DMA source ID quirks) (Alex Williamson)
- Add quirks for devices with broken INTx masking (Jan Kiszka)
Miscellaneous
- Fix some PCI Express capability version issues (Myron Stowe)
- Factor out some arch code with a weak, generic, pcibios_setup() (Myron Stowe)
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Merge tag 'for-3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull PCI changes from Bjorn Helgaas:
"Host bridge hotplug:
- Add MMCONFIG support for hot-added host bridges (Jiang Liu)
Device hotplug:
- Move fixups from __init to __devinit (Sebastian Andrzej Siewior)
- Call FINAL fixups for hot-added devices, too (Myron Stowe)
- Factor out generic code for P2P bridge hot-add (Yinghai Lu)
- Remove all functions in a slot, not just those with _EJx (Amos
Kong)
Dynamic resource management:
- Track bus number allocation (struct resource tree per domain)
(Yinghai Lu)
- Make P2P bridge 1K I/O windows work with resource reassignment
(Bjorn Helgaas, Yinghai Lu)
- Disable decoding while updating 64-bit BARs (Bjorn Helgaas)
Power management:
- Add PCIe runtime D3cold support (Huang Ying)
Virtualization:
- Add VFIO infrastructure (ACS, DMA source ID quirks) (Alex
Williamson)
- Add quirks for devices with broken INTx masking (Jan Kiszka)
Miscellaneous:
- Fix some PCI Express capability version issues (Myron Stowe)
- Factor out some arch code with a weak, generic, pcibios_setup()
(Myron Stowe)"
* tag 'for-3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (122 commits)
PCI: hotplug: ensure a consistent return value in error case
PCI: fix undefined reference to 'pci_fixup_final_inited'
PCI: build resource code for M68K architecture
PCI: pciehp: remove unused pciehp_get_max_lnk_width(), pciehp_get_cur_lnk_width()
PCI: reorder __pci_assign_resource() (no change)
PCI: fix truncation of resource size to 32 bits
PCI: acpiphp: merge acpiphp_debug and debug
PCI: acpiphp: remove unused res_lock
sparc/PCI: replace pci_cfg_fake_ranges() with pci_read_bridge_bases()
PCI: call final fixups hot-added devices
PCI: move final fixups from __init to __devinit
x86/PCI: move final fixups from __init to __devinit
MIPS/PCI: move final fixups from __init to __devinit
PCI: support sizing P2P bridge I/O windows with 1K granularity
PCI: reimplement P2P bridge 1K I/O windows (Intel P64H2)
PCI: disable MEM decoding while updating 64-bit MEM BARs
PCI: leave MEM and IO decoding disabled during 64-bit BAR sizing, too
PCI: never discard enable/suspend/resume_early/resume fixups
PCI: release temporary reference in __nv_msi_ht_cap_quirk()
PCI: restructure 'pci_do_fixups()'
...
Pull trivial tree from Jiri Kosina:
"Trivial updates all over the place as usual."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (29 commits)
Fix typo in include/linux/clk.h .
pci: hotplug: Fix typo in pci
iommu: Fix typo in iommu
video: Fix typo in drivers/video
Documentation: Add newline at end-of-file to files lacking one
arm,unicore32: Remove obsolete "select MISC_DEVICES"
module.c: spelling s/postition/position/g
cpufreq: Fix typo in cpufreq driver
trivial: typo in comment in mksysmap
mach-omap2: Fix typo in debug message and comment
scsi: aha152x: Fix sparse warning and make printing pointer address more portable.
Change email address for Steve Glendinning
Btrfs: fix typo in convert_extent_bit
via: Remove bogus if check
netprio_cgroup.c: fix comment typo
backlight: fix memory leak on obscure error path
Documentation: asus-laptop.txt references an obsolete Kconfig item
Documentation: ManagementStyle: fixed typo
mm/vmscan: cleanup comment error in balance_pgdat
mm: cleanup on the comments of zone_reclaim_stat
...
Pull x86 platform changes from Ingo Molnar:
"This tree mostly involves various APIC driver cleanups/robustization,
and vSMP motivated platform callback improvements/cleanups"
Fix up trivial conflict due to printk cleanup right next to return value
change.
* 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (29 commits)
Revert "x86/early_printk: Replace obsolete simple_strtoul() usage with kstrtoint()"
x86/apic/x2apic: Use multiple cluster members for the irq destination only with the explicit affinity
x86/apic/x2apic: Limit the vector reservation to the user specified mask
x86/apic: Optimize cpu traversal in __assign_irq_vector() using domain membership
x86/vsmp: Fix vector_allocation_domain's return value
irq/apic: Use config_enabled(CONFIG_SMP) checks to clean up irq_set_affinity() for UP
x86/vsmp: Fix linker error when CONFIG_PROC_FS is not set
x86/apic/es7000: Make apicid of a cluster (not CPU) from a cpumask
x86/apic/es7000+summit: Always make valid apicid from a cpumask
x86/apic/es7000+summit: Fix compile warning in cpu_mask_to_apicid()
x86/apic: Fix ugly casting and branching in cpu_mask_to_apicid_and()
x86/apic: Eliminate cpu_mask_to_apicid() operation
x86/x2apic/cluster: Vector_allocation_domain() should return a value
x86/apic/irq_remap: Silence a bogus pr_err()
x86/vsmp: Ignore IOAPIC IRQ affinity if possible
x86/apic: Make cpu_mask_to_apicid() operations check cpu_online_mask
x86/apic: Make cpu_mask_to_apicid() operations return error code
x86/apic: Avoid useless scanning thru a cpumask in assign_irq_vector()
x86/apic: Try to spread IRQ vectors to different priority levels
x86/apic: Factor out default vector_allocation_domain() operation
...
Pull core/iommu changes from Ingo Molnar.
* 'core-iommu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
iommu/dmar: Use pr_format() instead of PREFIX to tidy up pr_*() calls
iommu/dmar: Reserve mmio space used by the IOMMU, if the BIOS forgets to
iommu/dmar: Replace printks with appropriate pr_*()
This did not work because devices are not put into the
pt_domain. Fix this.
Cc: stable@vger.kernel.org
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This step makes it very easy to keep track about the current
intialization state of the iommu driver. With this change we
can initialize the IOMMU hardware to a point where it can
remap interrupts and later resume the initializion to enable
dma remapping.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This function will initialize everthing necessary so that
devices can do DMA. This includes dma_ops and iommu_ops.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This function will be called before the PCI subsystem is
initialized. Therefore dev_name doen't work and IOMMU
information can't be printed to the klog as before. Move the
code to print that information to a later point where PCI
initializtion has already happened.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
For interrupt remapping the relevant IOMMU initialization
needs to run earlier at boot when the PCI subsystem is not
yet initialized. To support that this patch splits the parts
of IOMMU initialization which need PCI accesses out of the
initial setup path so that this can be done later.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This makes it easier to propagate errors while parsing the
IVRS table and makes the amd_iommu_init_err hack obsolete.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
A few sparse warnings fire in drivers/iommu/amd_iommu_init.c.
Fix most of them with this patch. Also fix the sparse
warnings in drivers/iommu/irq_remapping.c while at it.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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Merge tag 'v3.5-rc7' into arm/tegra
This solves the merge conflicts while creating the next
branch.
Linux 3.5-rc7
Conflicts:
drivers/iommu/tegra-smmu.c
Instead of taking as->lock before calling alloc_pdir() and
releasing it in that function to allocate memory, just take
the lock only in the alloc_pdir function and run the loop
without any lock held. This simplifies the complicated
lock->unlock->alloc->lock->unlock sequence into
alloc->lock->unlock.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
alloc_pdir() is called from smmu_iommu_domain_init() with spin_lock
held. memory allocations in alloc_pdir() had to be atomic. Instead of
converting into atomic allocation, this patch once releases a lock,
does the allocation, holds the lock again and then sees if it's raced
or not in order to avoid introducing mutex and preallocation.
Signed-off-by: Hiroshi DOYU <hdoyu@nvidia.com>
Reported-by: Chris Wright <chrisw@sous-sol.org>
Cc: Chris Wright <chrisw@sous-sol.org>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
alloc_pdir() is called with smmu->as[?].pdir_page == NULL. No need to
check pdir_page again inside alloc_pdir().
Signed-off-by: Hiroshi DOYU <hdoyu@nvidia.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This patch introduces an extension to the iommu-api to get
and set attributes for an iommu_domain. Two functions are
introduced for this:
* iommu_domain_get_attr()
* iommu_domain_set_attr()
These functions will be used to make the iommu-api suitable
for GART-like IOMMUs and to implement hardware-specifc
api-extensions.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
write_file_bool() modifies 32 bits of data, so "amd_iommu_unmap_flush"
needs to be 32 bits as well or we'll corrupt memory. Fortunately it
looks like the data is aligned with a gap after the declaration so this
is harmless in production.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
allo_pdir() is called in smmu_iommu_domain_init() with spin_lock
held. memory allocations in it have to be atomic/unsleepable.
Signed-off-by: Hiroshi DOYU <hdoyu@nvidia.com>
Reported-by: Chris Wright <chrisw@sous-sol.org>
Acked-by: Chris Wright <chrisw@sous-sol.org>
Cc: stable@vger.kernel.org
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
For the compiler warning, uninitizlized var when getting value by a
pointer.
Signed-off-by: Hiroshi DOYU <hdoyu@nvidia.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
To simplify the code, alloc necessary data at once.
Signed-off-by: Hiroshi DOYU <hdoyu@nvidia.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
The necessary info is expected to pass from DT.
For more precise resource reservation, there shouldn't be any
overlapping of register range between SMMU and MC. SMMU register
offset needs to be calculated correctly, based on its register bank.
Signed-off-by: Hiroshi DOYU <hdoyu@nvidia.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This code was based on:
"arch/microblaze/kernel/prom_parse.c"
"arch/powerpc/kernel/prom_parse.c"
Can replace "of_parse_dma_window()" in the above. This supports
different formats flexibly. "prefix" can be configured if any. "busno"
and "index" are optionally specified. Set NULL and 0 if not used.
Signed-off-by: Hiroshi DOYU <hdoyu@nvidia.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Work around broken devices and adhere to ACS support when determining
IOMMU grouping.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Work around broken devices and adhere to ACS support when determining
IOMMU grouping.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Add IOMMU group support to Intel VT-d code. This driver sets up
devices ondemand, so make use of the add_device/remove_device
callbacks in IOMMU API to manage setting up the groups.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Add IOMMU group support to AMD-Vi device init and uninit code.
Existing notifiers make sure this gets called for each device.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
IOMMU device groups are currently a rather vague associative notion
with assembly required by the user or user level driver provider to
do anything useful. This patch intends to grow the IOMMU group concept
into something a bit more consumable.
To do this, we first create an object representing the group, struct
iommu_group. This structure is allocated (iommu_group_alloc) and
filled (iommu_group_add_device) by the iommu driver. The iommu driver
is free to add devices to the group using it's own set of policies.
This allows inclusion of devices based on physical hardware or topology
limitations of the platform, as well as soft requirements, such as
multi-function trust levels or peer-to-peer protection of the
interconnects. Each device may only belong to a single iommu group,
which is linked from struct device.iommu_group. IOMMU groups are
maintained using kobject reference counting, allowing for automatic
removal of empty, unreferenced groups. It is the responsibility of
the iommu driver to remove devices from the group
(iommu_group_remove_device).
IOMMU groups also include a userspace representation in sysfs under
/sys/kernel/iommu_groups. When allocated, each group is given a
dynamically assign ID (int). The ID is managed by the core IOMMU group
code to support multiple heterogeneous iommu drivers, which could
potentially collide in group naming/numbering. This also keeps group
IDs to small, easily managed values. A directory is created under
/sys/kernel/iommu_groups for each group. A further subdirectory named
"devices" contains links to each device within the group. The iommu_group
file in the device's sysfs directory, which formerly contained a group
number when read, is now a link to the iommu group. Example:
$ ls -l /sys/kernel/iommu_groups/26/devices/
total 0
lrwxrwxrwx. 1 root root 0 Apr 17 12:57 0000:00:1e.0 ->
../../../../devices/pci0000:00/0000:00:1e.0
lrwxrwxrwx. 1 root root 0 Apr 17 12:57 0000:06:0d.0 ->
../../../../devices/pci0000:00/0000:00:1e.0/0000:06:0d.0
lrwxrwxrwx. 1 root root 0 Apr 17 12:57 0000:06:0d.1 ->
../../../../devices/pci0000:00/0000:00:1e.0/0000:06:0d.1
$ ls -l /sys/kernel/iommu_groups/26/devices/*/iommu_group
[truncating perms/owner/timestamp]
/sys/kernel/iommu_groups/26/devices/0000:00:1e.0/iommu_group ->
../../../kernel/iommu_groups/26
/sys/kernel/iommu_groups/26/devices/0000:06:0d.0/iommu_group ->
../../../../kernel/iommu_groups/26
/sys/kernel/iommu_groups/26/devices/0000:06:0d.1/iommu_group ->
../../../../kernel/iommu_groups/26
Groups also include several exported functions for use by user level
driver providers, for example VFIO. These include:
iommu_group_get(): Acquires a reference to a group from a device
iommu_group_put(): Releases reference
iommu_group_for_each_dev(): Iterates over group devices using callback
iommu_group_[un]register_notifier(): Allows notification of device add
and remove operations relevant to the group
iommu_group_id(): Return the group number
This patch also extends the IOMMU API to allow attaching groups to
domains. This is currently a simple wrapper for iterating through
devices within a group, but it's expected that the IOMMU API may
eventually make groups a more integral part of domains.
Groups intentionally do not try to manage group ownership. A user
level driver provider must independently acquire ownership for each
device within a group before making use of the group as a whole.
This may change in the future if group usage becomes more pervasive
across both DMA and IOMMU ops.
Groups intentionally do not provide a mechanism for driver locking
or otherwise manipulating driver matching/probing of devices within
the group. Such interfaces are generic to devices and beyond the
scope of IOMMU groups. If implemented, user level providers have
ready access via iommu_group_for_each_dev and group notifiers.
iommu_device_group() is removed here as it has no users. The
replacement is:
group = iommu_group_get(dev);
id = iommu_group_id(group);
iommu_group_put(group);
AMD-Vi & Intel VT-d support re-added in following patches.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
When a device is added to the system at runtime the AMD
IOMMU driver initializes the necessary data structures to
handle translation for it. But it forgets to change the
per-device dma_ops to point to the AMD IOMMU driver. So
mapping actually never happens and all DMA accesses end in
an IO_PAGE_FAULT. Fix this.
Reported-by: Stefan Assmann <sassmann@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Move the ->irq_set_affinity() routines out of the #ifdef CONFIG_SMP
sections and use config_enabled(CONFIG_SMP) checks inside those
routines. Thus making those routines simple null stubs for
!CONFIG_SMP and retaining those routines with no additional
runtime overhead for CONFIG_SMP kernels.
Cleans up the ifdef CONFIG_SMP in and around routines related to
irq_set_affinity in io_apic and irq_remapping subsystems.
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: torvalds@linux-foundation.org
Cc: joerg.roedel@amd.com
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Link: http://lkml.kernel.org/r/1339723729.3475.63.camel@sbsiddha-desk.sc.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Replace the struct pci_bus secondary/subordinate members with the
struct resource busn_res. Later we'll build a resource tree of these
bus numbers.
[bhelgaas: changelog]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
There is an extra semicolon here so the pr_err() message is
printed when it is not intended.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
Cc: Alexander Gordeev <agordeev@redhat.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Joerg Roedel <joerg.roedel@amd.com>
Link: http://lkml.kernel.org/r/20120612162633.GA11077@elgon.mountain
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Joe Perches recommended getting rid of the redundant
formatting of adding "PREFIX" to all the uses of pr_*() calls.
The recommendation helps to reduce source and improve
readibility.
While cleaning up the PREFIX's, I saw that one of
the pr_warn() was redundant in dmar_parse_one_dev_scope(),
since the same message was printed after breaking out of the
while loop for the same condition, !pdev.
So, to avoid a duplicate message, I removed the one in the while
loop.
Reported-by: Joe Perches <joe@perches.com>
Signed-off-by: Donald Dutile <ddutile@redhat.com>
Cc: iommu@lists.linux-foundation.org
Cc: chrisw@redhat.com
Cc: suresh.b.siddha@intel.com
Cc: dwmw2@infradead.org
Link: http://lkml.kernel.org/r/1339189991-13129-1-git-send-email-ddutile@redhat.com
[ Small whitespace fixes. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Intel-iommu initialization doesn't currently reserve the memory
used for the IOMMU registers. This can allow the pci resource
allocator to assign a device BAR to the same address as the
IOMMU registers. This can cause some not so nice side affects
when the driver ioremap's that region.
Introduced two helper functions to map & unmap the IOMMU
registers as well as simplify the init and exit paths.
Signed-off-by: Donald Dutile <ddutile@redhat.com>
Acked-by: Chris Wright <chrisw@redhat.com>
Cc: iommu@lists.linux-foundation.org
Cc: suresh.b.siddha@intel.com
Cc: dwmw2@infradead.org
Link: http://lkml.kernel.org/r/1338845342-12464-3-git-send-email-ddutile@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Current cpu_mask_to_apicid() and cpu_mask_to_apicid_and()
implementations have few shortcomings:
1. A value returned by cpu_mask_to_apicid() is written to
hardware registers unconditionally. Should BAD_APICID get ever
returned it will be written to a hardware too. But the value of
BAD_APICID is not universal across all hardware in all modes and
might cause unexpected results, i.e. interrupts might get routed
to CPUs that are not configured to receive it.
2. Because the value of BAD_APICID is not universal it is
counter- intuitive to return it for a hardware where it does not
make sense (i.e. x2apic).
3. cpu_mask_to_apicid_and() operation is thought as an
complement to cpu_mask_to_apicid() that only applies a AND mask
on top of a cpumask being passed. Yet, as consequence of 18374d8
commit the two operations are inconsistent in that of:
cpu_mask_to_apicid() should not get a offline CPU with the cpumask
cpu_mask_to_apicid_and() should not fail and return BAD_APICID
These limitations are impossible to realize just from looking at
the operations prototypes.
Most of these shortcomings are resolved by returning a error
code instead of BAD_APICID. As the result, faults are reported
back early rather than possibilities to cause a unexpected
behaviour exist (in case of [1]).
The only exception is setup_timer_IRQ0_pin() routine. Although
obviously controversial to this fix, its existing behaviour is
preserved to not break the fragile check_timer() and would
better addressed in a separate fix.
Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
Acked-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/20120607131559.GF4759@dhcp-26-207.brq.redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
The iommu_shutdown callback is not initialized when the AMD
IOMMU driver runs in passthrough mode. Fix that by moving
the callback initialization before the check for
passthrough mode.
Signed-off-by: Shuah Khan <shuah.khan@hp.com>
Cc: stable@vger.kernel.org
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
