| 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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As we expect all source files to include the header as the first thing
anyway, stop doing this by repeating the inclusion in each and every
source file (and in many headers), but rather enforce this uniformly
through the compiler command line.
As a first cleanup step, remove the explicit inclusion from all common
headers. Further cleanup can be done incrementally.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Keir Fraser <keir@xen.org>
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This is particularly relevant as the number of CPUs to be supported
increases (as recently happened for the default thereof).
Signed-off-by: Jan Beulich <jbeulich@suse.com>
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Where this is safe, it can reduce latency and cpu overhead compared
with scheduling the idle vcpu to perform the same tasklet work.
Signed-off-by: Keir Fraser <keir@xen.org>
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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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...rather than in softirq context. This is expected to avoid a lot of
subtle deadlocks relating to the fact that softirqs can interrupt a
scheduled vcpu.
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
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This is preparation for implementing tasklets in vcpu context rather
than softirq context. There is no change to the implementation of
tasklets in this patch.
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
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Signed-off-by: Juergen Gross <juergen.gross@ts.fujitsu.com>
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
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This ensures that any critical softirqs are handled in a timely manner
(e.g., TIME_CALIBRATE_SOFTIRQ) while still avoiding being preempted by
the scheduler (by SCHEDULE_SOFTIRQ), which is the reason for avoiding
use of do_softirq() directly.
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
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This patch enables delivery of interrupts even if the VCPU#0 is
halted.
Note: the changes to softirq.{ch} are needed for ia64 build.
Signed-off-by: Kouya Shimura <kouya@jp.fujitsu.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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Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
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busy-wait for softirq work to start. This reduces the possibility of
deadlocks, but the implementation is now less efficient. For the
current few users of tasklets this does not matter.
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
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TRACE_SOFTIRQ does not appear to be necessary at all.
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 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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Signed-off-by: Jose Renato Santos <jsantos@hpl.hp.com>
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Signed-off-by: Alex Williamson <alex.williamson@hp.com>
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This avoids a possible deadlock on the per-domain 'big lock'.
No control tools depend on synchronous halting of execution (e.g.,
save/restore already expect that secondary CPUs were halted
synchronously under the control of the guest itself). This makes the
code rather less complex.
Signed-off-by: Keir Fraser <keir@xensource.com>
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Signed-off-by: Emmanuel Ackaouy <ack@xensource.com>
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Signed-off-by: Rob Gardner <rob.gardner@hp.com>
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meaningless and unnecessary.
Rename rem_timer -> stop_timer.
Signed-off-by: Keir Fraser <keir@xensource.com>
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This patch adds core and generic x86 support code to enable Xen to
pass NMI's to a dedicated NMI callback in DOM0 instead of raising a
VIRQ.
Introduces the nmi_op hypercall to allow DOM0 to (un)register the NMI
handler.
Signed-off-by: Ian Campbell <Ian.Campbell@XenSource.com>
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VIRQ_NMI. Also simplify x86_32 NMI handling -- there's
no need to greedily consume IO/parity errors in
assembly code as they can be deferred without causing
an interrupt storm (the NMI pin is always edge-triggered
even though the sources are level-asserted).
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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Fix domain shutdown so that the new status, and notification to domain0,
occur *after* the domain is fully descheduled and its execution state
synchronised.
Signed-off-by: Keir Fraser <keir@xensource.com>
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Schedule page scrubbing for dead domains off the per-cpu periodic
ticker. We take 10% of busy cpus and all of idle cpu time.
Signed-off-by: Keir Fraser <keir@xensource.com>
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Clean up softirq handling. All debug keypresses are now deferred to
a softirq handler.
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keyhandler to perform a debug audit of domain memory, checking the page type and
counts are consistent with the pagetable state. Its quite verbose and
prints out details of all interesting pages.
(e.g. pages shared between domains or used for LDT/GDTs).
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More NMI-handling cleanups. Users now have an option of what to do
with an error NMI by specifying 'nmi=xxx' on Xen's cmdline.
'nmi=dom0' -> Tell DOM0 about it (DOM0 currently ignores it).
'nmi=ignore' -> ignore it
'nmi=fatal' -> print a diagnostic and then hang.
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Fix pdb.
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More cleanups.
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