| Commit message (Collapse) | Author | Age | Files | Lines |
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This eliminates passing and returning by value of this type (making it
unnecessary for the compiler to create temporary variables for doing so
on the stack), thus dramatically reducing the stack frame sizes of a
couple of functions (was in one case over 12k for a 4095-CPU build).
In one case a local variable gets converted to a static one, possible
because the function gets called at most once (during early boot).
Some accessors get eliminated altogether as being unused or as being
equally well open coded at the place of use.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Keir Fraser <keir@xen.org>
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Remove unused and pointless bits from mpparse.c (and other files where
they are related to it). Of what remains, move whatever possible into
.init.*, and some data items into .data.read_mostly.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
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Instead of going with mpc_config_processor struct.
that field ony have 8 bits.
We should not change that struct, because it is shared with mptable.
Also need to increase MAX_APICS.
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Rather than using a fixed value of 512, make this scale with NR_CPUS
(which obviously still doesn't cover all theoretically possible
systems, but at least allows some build time control).
Signed-off-by: Jan Beulich <jbeulich@novell.com>
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From: Sheng Yang <sheng.yang@intel.com>
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
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...and fix up the ensuing fall-out of implicit dependencies
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
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All CPUs are now brought up in __cpu_up(), in the correct order for
cpu-bringup notifiers.
Notably ganged TSC calibration is removed. This was another
start-of-day-specific aspect of bringup. If we really need
calibration, I think we can come up with an efficient method for APs
to calibrate themselves against PIT during their bringup (even
asynchronously, if required for efficiency).
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
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Currently a CPU is marked as present only after it has been kicked off
successfully, i.e. before the CPU is brought up, it is not
present. This patch try to mark CPU as present when it is detected
(either through MPS table or ACPI). If it can't be brought up
successfully, it will be marked as non-present again. This change is
mainly for CPU hot-plug. As discussed, we'd take two step for physical
CPU hot-add. A CPU is firstly marked as present, and later will bring
as online.
Also, In smp_boot_cpus(), xen need only scan all present CPU, and no
need to loop from 0... NR_CPUS. With this change, the bios_cpu_apicid
is not needed anymore.
Signed-off-by: Jiang, Yunhong <yunhong.jiang@intel.com>
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- remove redundant declarations
- add/move prototypes to headers
- move things where they belong to
Signed-off-by: Christoph Egger <Christoph.Egger@amd.com>
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Since Xen and Linux has big differece in code base, it
is very hard to port Linux's patch and apply it to Xen
directly, so this patch only adopts core logic of Linux,
and make it work for Xen.
Key changes:
1. vector allocation algorithm
2. all IRQ chips' set_affinity logic
3. IRQ migration when cpu hot remove.
4. Break assumptions which depend on global vector policy.
Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com>
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Signed-off-by: Dexuan Cui <dexuan.cui@intel.com>
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Signed-off-by: Dexuan Cui <dexuan.cui@intel.com>
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legacy boxes with very non-standard APIC setup.
From: Raj Subrahmanian <raj.subrahmanian@unisys.com>
Signed-off-by: Keir Fraser <keir@xensource.com>
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Signed-off-by: Ryan Harper <ryanh@us.ibm.com>
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Signed-off-by: Steven Hand <steven@xensource.com>
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replaced with unconditional static 'sane' implementations.
Functions relating to interrupt/IPI delivery have been
grouped into two sets: physical delivery and logical-flat
delivery. All subarchitectures use physical delivery except
the basic default subarchitecture.
The main behavioural changes are:
1. Summit no longer uses logical-clustered delivery mode
2. Physical mode no longer makes any pretence to set the
LDR sanely. We never deliver interrupts in logical mode
so this really should not matter.
3. Sanity checking of phys_cpu_present_map is enabled
for all subarchitectures. Really we should have a sane
set of APIC IDs in the system, as we rely on them for
physical delivery mode.
4. We enable 'bigsmp' mode on any system with more than
eight CPUs. The previous xAPIC check was unnecessary,
since our bigsmp mode uses physical delivery, not
logical-clustered.
This all obviously needs testing on some big systems.
Signed-off-by: Keir Fraser <keir@xensource.com>
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subarch apicdef.h and ipi.h can be much simplified.
Signed-off-by: Keir Fraser <keir@xensource.com>
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shortcutting IPI functions. They're either unused or used so
frequently that we may as well simplify things and always use
send_IPI_mask.
Signed-off-by: Keir Fraser <keir@xensource.com>
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genapic structure that Xen does not require (mostly because we do
not support Visual Workstation nor IBM/Sequent NUMA-Q).
Signed-off-by: Keir Fraser <keir@xensource.com>
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in clustered mode with the apic=bigsmp kernel parameter. This patch does
the APIC mode selection automatically without needing to manually specify
the kernel paremeter.
(KAF note: I see the patch is also present in Linux 2.6.14.2)
Signed-off-by: Nitin Kamble <nitin.a.kamble@intel.com>
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
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Signed-off-by: Aravindh Puthiyaparambil <aravindh.puthiyaparambil@unisys.com>
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Ported genapic to Xen: support for bigsmp and numa platforms such as
es7000.
Signed-off-by: Keir Fraser <keir@xensource.com>
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