Intended for domain builder code to be able to set architecture
specific optimization features for a domain.
Signed-off-by: Alex Williamson <alex.williamson@hp.com>
Acked-by: Keir Fraser <keir.fraser@citrix.com>
This is an optional domain config entry that may be used by
architecture specific builder code to setup various optimizations
based on the guest OS intended to run in the domain. Based on
patch from Zhang Xin.
Signed-off-by: Alex Williamson <alex.williamson@hp.com>
Acked-by: Keir Fraser <keir.fraser@citrix.com>
cr_irr can be modified even when a vcpu is blocked (by itv handler).
Unconditionally setting cr_irr can trouble debugger as it may clear a bit
of cr_irr and thus miss an interrupt. This can be very annoying if the
interrupt is itv and the vcpu is inside PAL_HALT_LIGHT (the vcpu stays
blocked forever).
Signed-off-by: Tristan Gingold <tgingold@free.fr>
vmx realmode: Fix decode & emulate loop, add hooks for CPUID, HLT and
WBINVD. Also do not hook realmode entry off of vmentry failure any
more.
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
Also tweak debug tracing to be much less noisy. We can emulates tens
of thousands of instructions in rombios now.
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
Still plenty to do:
- i/o emulation
- more instructions
- interrupt/exception delivery
- vm86 fast path
At this stage we can get three instructions into the rombios.
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
This patch removes a wrong if condition judgement to setup rmrr
identify mapping for guests, and passes page count rather than address
size to iommu_flush_iotlb_psi().
Signed-off-by: Weidong Han <weidong.han@intel.com>
Signed-off-by: Anthony Xu <Anthony.xu@intel.com>
Since the pre_domain_create hook is called also for Dom-0, this
special case handling is not necessary any more.
Signed-off-by: Stefan Berger <stefanb@us.ibm.com>
Even when using __builtin_memcmp, gcc may emit external references to
memcmp (when not optimizing for instance), so this #define does not
always provide a completely suitable memcmp().
Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
A callback which wakes a thread may happen between the moment
schedule() gives hand to the idle thread and the latter blocks the
domain. Idle hence needs to atomically check that no thread is
running and block, else awoken threads may have to wait up to 10
seconds.
Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>
If a thread tries to sleep from a callback or with callbacks disabled,
Mini-OS will completely lock, so make sure this never happens.
Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>
Fix xmit overflow by making netfront_xmit sleep until
network_tx_buf_gc() frees an xmit request.
Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>
As it may compete with event handlers waking wait queues, wake_up
needs to be callback-safe.
Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>
One may want to use semaphores in event handlers to wake threads
waiting for a resource, so semaphores then need to be callback-safe.
Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>
hvmloader is modified to dynamically detect this, allowing possibility
of optional full vmxassist replacement in 3.2 stable branch in future.
Currently 'vmxassist=y' is not much use since no replacement is
implemented.
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
When assign multiple devices to guest which uses PIC, ISA IRQ alias
may occur. This patch splits ISA IRQ and GSI eoi function. In ISA IRQ
eoi function, searches all assigned mirqs and does eoi for the
corresponding mirqs which match the eoi ISA IRQ. Therefore fix ISA IRQ
alias issue.
Signed-off-by: Weidong Han <weidong.han@intel.com>
Make bind_virq() return the port bound to the irq, which is useful
e.g. for masking/unmasking it.
Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>
Fix x86 arch_switch_thread by making it pure assembly.
There were missing general register clobbers for x86_64, and BP should
theorically be clobbered too, but gcc does not believe that, so the
only simple safe solution is to use pure assembly.
Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>
So as to make backtracing tools happy, correctly close x86 stacks for
new threads as well as on callback in the x86_32 case since there is
no unwind marker.
Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>
This fixes the initial stack alignment for x86, which is required for
current to return a fine NULL instead of a random value or possibly
crash during initialization.
Signed-off-by: Grzegorz Milos <gm281@cam.ac.uk>
Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>
Emulate the trapping on I/O port accesses when emulating IN/OUT.
Also allow 8-byte breakpoints on x86-64 (and on i686 if the hardware
supports them), and tighten the condition for loading debug registers
during context switch.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Keir Fraser <keir.fraser@eu.citrix.com>
Inject single step trap after emulating instructions if guest's
EFLAGS.TF is set.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Keir Fraser <keir.fraser@eu.citrix.com>
Alex Williamson
Keir Fraser
Keir Fraser