| Commit message (Collapse) | Author | Age | Files | Lines |
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Impact: adds a new protection domain flag
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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Impact: add a generic function to lockup addresses in protection domains
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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Impact: add a generic function to unmap pages into protection domains
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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Impact: add a generic function to map pages into protection domains
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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Impact: add a generic function to attach devices to protection domains
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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Impact: add a generic function to detach devices from protection domains
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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Impact: add a generic function for releasing protection domains
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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Impact: add a generic function for allocation protection domains
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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Impact: add a function to remove all devices from a domain
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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Impact: inform IOMMU about state change of a device in the driver core
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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Impact: add helper functions to detach a device from a domain
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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Impact: rename set_device_domain() to attach_device()
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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Impact: know how many devices are assigned to a domain
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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Impact: detect when a driver uses a device assigned otherwise
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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Imapct: add a new struct member to 'struct protection_domain'
When using protection domains for dma_ops and KVM its better to know for
which subsystem it was allocated. Add a flags member to struct
protection domain for that purpose.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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Impact: add a function to flush a domain id on every IOMMU
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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Impact: save unneeded logic to add and remove domains to the list
The removal of a protection domain from the iommu_pd_list is not
necessary. Another benefit is that we save complexity because we don't
have to readd it later when the device no longer uses the domain.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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Impact: refactoring of iommu_queue_inv_iommu_pages
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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Impact: split one function into three
The separate functions are required synchronize commands across all
hardware IOMMUs in the system.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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Impact: add code to release a domain id
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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Impact: change code to free pagetables from protection domains
The dma_ops_free_pagetable function can only free pagetables from
dma_ops domains. Change that to free pagetables of pure protection
domains.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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Impact: function rename
The iommu_map function maps only one page. Make this clear in the
function name.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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These two IOMMUs can implement the current version of this API. So
select the API if one or both of these IOMMU drivers is selected.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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Impact: file renamed
The code in the vtd.c file can be reused for other IOMMUs as well. So
rename it to make it clear that it handle more than VT-d.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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* 'cputime' of git://git390.osdl.marist.edu/pub/scm/linux-2.6:
[PATCH] fast vdso implementation for CLOCK_THREAD_CPUTIME_ID
[PATCH] improve idle cputime accounting
[PATCH] improve precision of idle time detection.
[PATCH] improve precision of process accounting.
[PATCH] idle cputime accounting
[PATCH] fix scaled & unscaled cputime accounting
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The cpu time spent by the idle process actually doing something is
currently accounted as idle time. This is plain wrong, the architectures
that support VIRT_CPU_ACCOUNTING=y can do better: distinguish between the
time spent doing nothing and the time spent by idle doing work. The first
is accounted with account_idle_time and the second with account_system_time.
The architectures that use the account_xxx_time interface directly and not
the account_xxx_ticks interface now need to do the check for the idle
process in their arch code. In particular to improve the system vs true
idle time accounting the arch code needs to measure the true idle time
instead of just testing for the idle process.
To improve the tick based accounting as well we would need an architecture
primitive that can tell us if the pt_regs of the interrupted context
points to the magic instruction that halts the cpu.
In addition idle time is no more added to the stime of the idle process.
This field now contains the system time of the idle process as it should
be. On systems without VIRT_CPU_ACCOUNTING this will always be zero as
every tick that occurs while idle is running will be accounted as idle
time.
This patch contains the necessary common code changes to be able to
distinguish idle system time and true idle time. The architectures with
support for VIRT_CPU_ACCOUNTING need some changes to exploit this.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Impact: fix crash on x86/UV
UV is the SGI "UltraViolet" machine, which is x86_64 based.
BAU is the "Broadcast Assist Unit", used for TLB shootdown in UV.
This patch removes the allocation and initialization of an unused table.
This table is left over from a development test mode. It is unused in
the present code.
And it was incorrectly initialized: 8 entries allocated but 17 initialized,
causing slab corruption.
This patch should go into 2.6.27 and 2.6.28 as well as the current tree.
Diffed against 2.6.28 (linux-next, 12/30/08)
Signed-off-by: Cliff Wickman <cpw@sgi.com>
Cc: <stable@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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The pda rework (commit 3461b0af025251bbc6b3d56c821c6ac2de6f7209)
to remove static boot cpu pdas introduced a performance bug.
_boot_cpu_pda is the actual pda used by the boot cpu and is definitely
not "__read_mostly" and ended up polluting the read mostly section with
writes. This bug caused regression of about 8-10% on certain syscall
intensive workloads.
Signed-off-by: Ravikiran Thirumalai <kiran@scalex86.org>
Acked-by: Mike Travis <travis@sgi.com>
Cc: <stable@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Conflicts:
arch/x86/kernel/reboot.c
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'cpus4096-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (66 commits)
x86: export vector_used_by_percpu_irq
x86: use logical apicid in x2apic_cluster's x2apic_cpu_mask_to_apicid_and()
sched: nominate preferred wakeup cpu, fix
x86: fix lguest used_vectors breakage, -v2
x86: fix warning in arch/x86/kernel/io_apic.c
sched: fix warning in kernel/sched.c
sched: move test_sd_parent() to an SMP section of sched.h
sched: add SD_BALANCE_NEWIDLE at MC and CPU level for sched_mc>0
sched: activate active load balancing in new idle cpus
sched: bias task wakeups to preferred semi-idle packages
sched: nominate preferred wakeup cpu
sched: favour lower logical cpu number for sched_mc balance
sched: framework for sched_mc/smt_power_savings=N
sched: convert BALANCE_FOR_xx_POWER to inline functions
x86: use possible_cpus=NUM to extend the possible cpus allowed
x86: fix cpu_mask_to_apicid_and to include cpu_online_mask
x86: update io_apic.c to the new cpumask code
x86: Introduce topology_core_cpumask()/topology_thread_cpumask()
x86: xen: use smp_call_function_many()
x86: use work_on_cpu in x86/kernel/cpu/mcheck/mce_amd_64.c
...
Fixed up trivial conflict in kernel/time/tick-sched.c manually
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Impact: build fix
lguest can be built as a module and makes use of this new symbol:
ERROR: "vector_used_by_percpu_irq" [drivers/lguest/lg.ko] undefined!
export it.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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These commits:
commit 95d313cf1c1ecedc8bec5727b09bdacbf67dfc45
Author: Mike Travis <travis@sgi.com>
Date: Tue Dec 16 17:33:54 2008 -0800
x86: Add cpu_mask_to_apicid_and
and
commit 6eeb7c5a99434596c5953a95baa17d2f085664e3
Author: Mike Travis <travis@sgi.com>
Date: Tue Dec 16 17:33:55 2008 -0800
x86: update add-cpu_mask_to_apicid_and to use struct cpumask*
broke interrupt delivery on x2apic platforms. As x2apic cluster mode uses
logical delivery mode, we need to use logical apicid instead of physical apicid
in x2apic_cpu_mask_to_apicid_and()
Impact: fixes the broken interrupt delivery issue on generic x2apic platforms.
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Acked-by: Mike Travis <travis@sgi.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Impact: fix lguest, clean up
32-bit lguest used used_vectors to record vectors, but that model of
allocating vectors changed and got broken, after we changed vector
allocation to a per_cpu array.
Try enable that for 64bit, and the array is used for all vectors that
are not managed by vector_irq per_cpu array.
Also kill system_vectors[], that is now a duplication of the
used_vectors bitmap.
[ merged in cpus4096 due to io_apic.c cpumask changes. ]
[ -v2, fix build failure ]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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this warning:
arch/x86/kernel/io_apic.c: In function ‘ir_set_msi_irq_affinity’:
arch/x86/kernel/io_apic.c:3373: warning: ‘cfg’ may be used uninitialized in this function
triggers because the variable was truly uninitialized. We'd crash on
entering this code.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Impact: add new boot parameter
Use possible_cpus=NUM kernel parameter to extend the number of possible
cpus.
The ability to HOTPLUG ON cpus that are "possible" but not "present" is
dealt with in a later patch.
Signed-off-by: Mike Travis <travis@sgi.com>
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Impact: fix potential APIC crash
In determining the destination apicid, there are usually three cpumasks
that are considered: the incoming cpumask arg, cfg->domain and the
cpu_online_mask. Since we are just introducing the cpu_mask_to_apicid_and
function, make sure it includes the cpu_online_mask in it's evaluation.
[Added with this patch.]
There are two io_apic.c functions that did not previously use the
cpu_online_mask: setup_IO_APIC_irq and msi_compose_msg. Both of these
simply used cpu_mask_to_apicid(cfg->domain & TARGET_CPUS), and all but
one arch (NUMAQ[*]) returns only online cpus in the TARGET_CPUS mask,
so the behavior is identical for all cases.
[*: NUMAQ bug?]
Note that alloc_cpumask_var is only used for the 32-bit cases where
it's highly likely that the cpumask set size will be small and therefore
CPUMASK_OFFSTACK=n. But if that's not the case, failing the allocate
will cause the same return value as the default.
Signed-off-by: Mike Travis <travis@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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This done for conflict prevention: we merge it into the cpus4096 tree
because upcoming cpumask changes will touch apic.c that would collide
with x86/apic otherwise.
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Impact: build fix
The sparseirq tree crossed with the cpumask changes, fix the fallout.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Conflicts:
arch/x86/kernel/crash.c
Merged for semantic conflict:
arch/x86/kernel/reboot.c
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Conflicts:
arch/x86/kernel/io_apic.c
Merge irq/sparseirq here, to resolve conflicts.
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git://git.kernel.org/pub/scm/linux/kernel/git/travis/linux-2.6-cpus4096-for-ingo into cpus4096
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Impact: new API
The old topology_core_siblings() and topology_thread_siblings() return
a cpumask_t; these new ones return a (const) struct cpumask *.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Mike Travis <travis@sgi.com>
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Impact: use new API, remove cpumask from stack.
Change smp_call_function_mask() callers to smp_call_function_many().
This removes a cpumask from the stack, and falls back should allocating
the cpumask var fail (only possible with CONFIG_CPUMASKS_OFFSTACK).
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Mike Travis <travis@sgi.com>
Cc: jeremy@xensource.com
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Impact: Remove cpumask_t's from stack.
Simple transition to work_on_cpu(), rather than cpumask games.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Mike Travis <travis@sgi.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Robert Richter <robert.richter@amd.com>
Cc: jacob.shin@amd.com
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Impact: remove cpumask_t from stack.
We should not try to save and restore cpus_allowed on current.
We can't use work_on_cpu() here, since it's in the hotplug cpu path
(if anyone else tries to get the hotplug lock from a workqueue we
could deadlock against them).
Fortunately, we can just use smp_call_function_single() since the
function can run from an interrupt.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Mike Travis <travis@sgi.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
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Impact: use new API
Use the accessors rather than frobbing bits directly. Most of this is
in arch code I haven't even compiled, but is straightforward.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Mike Travis <travis@sgi.com>
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Impact: cleanup, futureproof
In fact, all cpumask ops will only be valid (in general) for bit
numbers < nr_cpu_ids. So use that instead of NR_CPUS in various
places.
This is always safe: no cpu number can be >= nr_cpu_ids, and
nr_cpu_ids is initialized to NR_CPUS at boot.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Mike Travis <travis@sgi.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
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