| Commit message (Collapse) | Author | Age | Files | Lines |
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Move for_each_set_bit from asm-x86/bitops.h to xen/bitops.h.
Replace #include <asm/bitops.h> with #include <xen/bitops.h> everywhere.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Keir Fraser <keir@xen.org>
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This fixes the wrong use of literal vector 0xF7 with an "int"
instruction (invalidated by 25113:14609be41f36) and the fact that doing
the injection via a software interrupt was never valid anyway (because
cmci_interrupt() acks the LAPIC, which does the wrong thing if the
interrupt didn't get delivered though it).
In order to do latter, the patch introduces send_IPI_self(), at once
removing two opend coded uses of "genapic" in the IRQ handling code.
Reported-by: Yongjie Ren <yongjie.ren@intel.com>
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Tested-by: Yongjie Ren <yongjie.ren@intel.com>
Acked-by: Keir Fraser <keir@xen.org>
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... as it in fact is only being used there. While moving it, also make
it a per-CPU variable rather than a NR_CPUS-sized array.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Keir Fraser <keir@xen.org>
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Signed-off-by: Keir Fraser <keir@xen.org>
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CONFIG_SMP is always enabled and !CONFIG_SMP is not supported. So
simplify the code a little by removing all #ifdefs.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Committed-by: Keir Fraser <keir@xen.org>
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... thus reducing the per-CPU data area size back to one page even when
building for large NR_CPUS.
At once eliminate the old __cpu{mask,list}_scnprintf() helpers.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Keir Fraser <keir@xen.org>
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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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Mainly this involves getting rid of a bunch of cpumasks and replacing
with a single 'cpu_state' enumeration to track progress and allow
master-slave handshaking.
Cleaning this stuff up is a prerequisite for safely handling slave
failure (e.g., out of memory, invalid slave CPU capabilities,
...). This will get fixed up in a future patch.
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
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This has two advantages:
(a) We can move the allocations to a context where we can handle
failure.
(b) We can implement matching deallocations on CPU offline.
Only the idle vcpu structure is now not freed on CPU offline. This
probably does not really matter.
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
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No semantic changes.
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
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The significant remaining culprits for x86 are credit2, hpet, and
percpu-area subsystems. To be dealt with in a separate patch.
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
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Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
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Also simplify the locking (reverting to use if spin_trylock, as
returning EBUSY/EAGAIN seems unavoidable after all). In particular
this should continue to ensure that stop_machine_run() does not have
cpu_online_map change under its feet.
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
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Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
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Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
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This patch add CPU hot-add in system.
a) It mark all CPU as possible when booting, if CONFIG_HOTPLUG_CPU is
set. BTW, this will increase per_cpu area.
b) When a CPU is added through hypercall, the CPU will be marked as
present and offline, and the numa information is setup if numa is
supported. The CPU will be brought to online by dom0 online explicitly.
Signed-off-by: Jiang, Yunhong <yunhong.jiang@intel.com>
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It also make some changes to current cpu online/offline logic:
1) Firstly, cpu online/offline will trigger a vIRQ to dom0 for status
changes notification.
2) It also add an interface to platform operation to online/offline
physical CPU. Currently the cpu online/offline interface is in sysctl,
which can't be triggered in kernel. With this change, it is possible
to trigger cpu online/offline in dom0 through sysfs interface.
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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1) Clear Interrupt Remapping(IR) unit's CFI (Compatibility Format
Interrupt) to enhance security;
2) Move the iommu_setup() ahead and put it before we begin to use
IOAPIC so we can make sure after we enable Interrupt Remapping, the
later IOAPIC (and MSI) initialization would setup IOAPIC RTEs (and
MSI) with remappable format;
3) Enable x2APIC only when all VT-d engines support IR with EIM
(Extended Interrupt Mode). EIM enables external devices to deliver
interrupts to logical processor with >8-bit APIC ID.
Signed-off-by: Dexuan Cui <dexuan.cui@intel.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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These cpu maps get read from all CPUs, so apart from addressing the
square(nr_cpus) growth of these objects, they also get moved into the
previously introduced read-mostly sub-section of the per-CPU section,
in order to not need to waste a full cacheline in order to align (and
properly pad) them, which would be undue overhead on systems with low
NR_CPUS.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
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Rather than passing cpumasks by value in all cases (which is
problematic for large NR_CPUS configurations), pass them 'by
reference' (i.e. through a pointer to a const cpumask).
On x86 this changes send_IPI_mask() to always only send IPIs to remote
CPUs (meaning any caller needing to handle the current CPU as well has
to do so on its own).
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
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While it is unlikely that a system has a different number of siblings
for different physical CPUs, make this parameter per-CPU for
consistency, and deal with the (so far theoretical) case that this is
different per CPU package.
Signed-off-by: Frank van der Linden <Frank.Vanderlinden@Sun.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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This is similar to stop_machine_run stub from Linux, to pull
selected cpus in rendezvous point and the do some batch work
under a safe environment. Current one usage is from S3 path,
where individual cpu is pulled down with related online
footprints being cleared. It's dangerous to have other cpus
checking clobbered data structure in the middle, such as
cpu_online_map, cpu_sibling_map, etc.
Signed-off-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
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Linux, under CONFIG_SECCOMP, has been capable of hiding the TSC from
processes for quite a while. This patch enables this to actually work
for pv kernels, by allowing them to control CR4.TSD (and, as a simple
thing to do at the same time, CR4.DE).
Applies cleanly only on top of the previously submitted debug register
handling patch.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Also clean up CR4 and EFER handling, and hack-n-slash header file
inclusion madness to get the tree building again.
Signed-off-by: Keir Fraser <keir@xensource.com>
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Add SMP sleep support to Xen. One new utility is created
to allow vcpu continue previous running after migration
to new processor.
Signed-off-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Keir Fraser <keir@xensource.com>
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support is specific to PM, instead of for a run-time
single CPU hotplug which can be a separate task. See
embedded comment:
/*
* XXX: One important thing missed here is to migrate vcpus
* from dead cpu to other online ones and then put whole
* system into a stop state. It assures a safe environment
* for a cpu hotplug/remove at normal running state.
*
* However for xen PM case, at this point:
* -> All other domains should be notified with PM event,
* and then in following states:
* * Suspend state, or
* * Paused state, which is a force step to all
* domains if they do nothing to suspend
* -> All vcpus of dom0 (except vcpu0) have already beem
* hot removed
* with the net effect that all other cpus only have idle vcpu
* running. In this special case, we can avoid vcpu migration
* then and system can be considered in a stop state.
*
* So current cpu hotplug is a special version for PM specific
* usage, and need more effort later for full cpu hotplug.
* (ktian1)
*/
Signed-off-by: Kevin Tian <kevin.tian@intel.com>
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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Signed-off-by: Keir Fraser <keir@xensource.com>
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This patch adds dual-core support to xen, and improves HT detection.
Adapted from linux 2.6.12.
Signed-off-by: Nguyen Anh Quynh <aquynh@gmail.com>
Signed-off-by: Keir Fraser <keir@xensource.com>
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Many files:
More include cleanups towards "include where it's used".
Signed-off-by: Christian Limpach <Christian.Limpach@cl.cam.ac.uk>
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Subject: PAE support
This patch adds initial support for PAE paging to xen.
This patch does:
* boot Xen itself with PAE paging enabled.
* add PAE support to the dom0 domain builder.
Some notes on the design and the changes:
* There are two new config options: CONFIG_X86_PAE (boolean,
same name Linux uses to simply things) and
CONFIG_PAGING_LEVELS (int, possible values are 2,3,4). I've
used #if CONFIG_PAGING_LEVELS for stuff which simply depends
on the number of paging levels in the code common for
x86-32/64, and CONFIG_X86_PAE for special PAE quirks or
i386-only stuff. I've tried to avoid ifdefs if possible
though, often I rearranged code to make it work in both
PAE and non-PAE case instead.
* idle_pg_table: 3rd level is statically initialized, 2nd
level is contignous in physical and virtual memory, so it can
be addressed linear (the dom0 builder uses the same trick to
simplify things a bit btw.). There are two new symbols:
idle_pg_table_l3 and idle_pg_table_l2 for the two tables.
idle_pg_table is aliased to the toplevel page table, i.e.
idle_pg_table_l3 in PAE mode and idle_pg_table_l2 in non-pae
mode. The idle l3 table is actually never ever touched after
boot, the l2 table is accessed via idle_pg_table_l2 and
addressed linear in both PAE and non-PAE mode.
* I've added a "intpte_t" type and a PRIpte define, modeled
after the C99 inttypes.h header, for page table entries.
Signed-off-by: Gerd Knorr <kraxel@bytesex.org>
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Re-factor current.h. It now requires no sub-architecture portions, and
stack offset calculations are cleaned up by introduction of a
cpu_info structure.
Signed-off-by: Keir Fraser <keir@xensource.com>
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Phase 1 of upgrading platform code to be derived from Linux 2.6.11
rather than 2.4.x.
Signed-off-by: Keir Fraser <keir@xensource.com>
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More x86/64. Now boot secondary CPUs, but I seem to have problems
executing IRET, so interrupts are fatal.
Signed-off-by: keir.fraser@cl.cam.ac.uk
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More grant-table code, and some related sundry improvements.
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Fix common files when compiled without CONFIG_SMP (some x86-specific
files still don't work).
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Many files:
More x86_64 stuff.
pda.h:
Rename: xen/include/asm-x86/x86_64/pda.h -> xen/include/asm-x86/pda.h
.del-config.h~ab742eeb14ad808f:
Delete: xen/include/asm-x86/x86_64/config.h
arch-x86_32.h:
Rename: xen/include/hypervisor-ifs/arch_x86_32.h -> xen/include/hypervisor-ifs/arch-x86_32.h
arch-x86_64.h:
Rename: xen/include/hypervisor-ifs/arch_x86_64.h -> xen/include/hypervisor-ifs/arch-x86_64.h
arch_x86_32.h:
Rename: xen/include/hypervisor-ifs/arch-x86/hypervisor-if.h -> xen/include/hypervisor-ifs/arch_x86_32.h
arch_x86_64.h:
Rename: xen/include/hypervisor-ifs/arch-x86_64/hypervisor-if.h -> xen/include/hypervisor-ifs/arch_x86_64.h
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Towards x86_64 support. Merged a bunch of the existing x86_64 stuff
back into a generic 'x86' architecture. Aim is to share as much
as possible between 32- and 64-bit worlds.
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