This small patch output message of elf_sanity_check as x86.
Currently this panic is the only following message.
(XEN) *** LOADING DOMAIN 0 ***
(XEN)
(XEN) ****************************************
(XEN) Panic on CPU 0:
(XEN) Could not set up DOM0 guest OS
(XEN) ****************************************
(XEN)
(XEN) Reboot in five seconds...
(XEN) machine_restart called: spinning....
[IA64] translate_domain_pte must handle ED bit and ignre bit[63:53]
made translate_domain_pte() aware _PAGE_ED bits.
_PAGE_PPN_MASK doesn't mask ED bit.
ED bit must be handled explicitly.
This case can occur by vcpu_itc_d().
Add support to physdev ops, and thus give IOSAPIC RTEs
managed by Xen now. Dom0 now issues hypercall to r/w
RTE entry. Another change is the irq vector allocation
which is also owned by xen now.
After this change, the IOSAPIC is almost owned by xen
with only exception as IOSAPIC EOI which is still issued
by dom0 directly. But that's OK since currently dom0
owns all external physical devices. Later full event
channel mechanism will provide necessary support for
driver domain, and at that time, dom0 instead issues
physdev_op (PHYSDEVOP_IRQ_UNMASK_NOTIFY) naturally as
replace of IOSAPIC EOI.
Read the message type out of the message before sending it to xenstored, and
use that saved value when handling the reply. Xenstored will leave the
message type intact, _except_ when returning an error, in which case it will
change the type to XS_ERROR. This meant that we failed to remove a
transaction from our internal list if xenstored returned EAGAIN, as we did not
realise that the message was XS_TRANSACTION_END. This manifested itself as
the intended behaviour until the connection was closed, at which point all of
those failed transactions would erroneously be aborted.
Big fixes for the new IO-APIC acknowledging method. The problems
were:
1. Some critical Xen interrupts could get blocked behind
unacknowledged guest interrupts. This is avoided by making
all Xen-bound interrrupts strictly higher priority.
2. Interrupts must not only be EOIed on the CPU that received
them, but also in reverse order when interrupts are nested.
A whole load of logic has been added to ensure this.
There are two boot parameters relating to all this:
'ioapic_ack=old' -- use the old IO-APIC ACK method
'ioapic_ack=new' -- use the new IO-APIC ACK method (default)
'force_intack' -- periodically force acknowledgement of
interrupts (default is no; useful for debugging)
This patch adds a section to the documentation on the late binding
feature for PCI devices. It provides some examples (mostly stolen from
the e-mail which accompanied the late-binding patch) of how to use the
sysfs attributes for late binding.
This patch was revised from the last documentation patch that I
submitted which included this and some documentation on the permissive
flag. I've divided the two sections up and I'd like this one considered
for acceptance now while I revise the permissive flag code.
Currently, it is possible to set the mem-max value to value lower than
what has been currently allocated to the domain causing the kernel to
crash. This patch validates the value passed in and prevents setting the
value below the current allocation level.
This patch enables external devices, such as for example a mounted hard
drive image or a TPM, to be migrated to a remote machine. The patch
hooks into the checkpointing (XendCheckpoint.py) code and performs
migration in 4 different steps:
In a 1st step (step = 0 in the code) migration of all devices of a
domain is 'tested', that means their driver implementations (blkif.py,
netif.py, tpmif.py, usbif.py, pciif.py) are queried whether migration is
possible at all. Currently all device representations respond with a
'yes' (=0), although probably a VM mounting a hard drive partition
should respond with a 'no' (-1) already. This first step is a quick
check to see whether devices can be migrated.
The 2nd step is to do whatever can be done before the domain is
suspended. At this point migration of the device could be initiated, if
at all possible.
The 3rd step is to migrate a device after the domain has been suspended,
meaning that it is not scheduled anymore and the VM is 'settled'. All
devices are called again and a good implementation would initiate the
migration in a background process to achieve as much concurrency as
possible.
The 4th step is to synchronize with the 3rd step. At this point the
implementor has to make sure that anything that was initiated in step 3
has completed. Once all steps 4 have been processed, the VM will resume
on the remove machine.
I have implemented hooks for migration of a virtual TPM in
xen/xend/server/tpmif.py. These hooks call a configurable external
migration tool using the os.popen() call with a fixed command line
parameter set. The implementation refuses to migrate a VM attached to a
virtual TPM if no tool has been provided for migration.
All other devices do not currently overload the 'migrate' method defined
in the DevController.py and therefore will just let migration happen.
I have added hooks for error recovery such that whatever part of
migration has been initiated can be rolled back when any of the devices
fail to migrate in one of the steps. The interface (in tpmif.py) to the
external application now uses os.popen() to allow error handling by
reading the application's output.
Clean up grant_mapping_t. Increase its size from 4bytes to 8bytes and
removed tight encoding of flag and ref. This change is xen-internal
so this shouldn't affect domain api.
Since we don't reset the proto_csum_blank flag in the skb, the
checksum calculation gets done twice, which is not twice as good as
once.
With this patch, TCP/UDP checksum errors from dom0 are fixed, and
domUs can use TCP/UDP without turning off TX checksum offload. Normal
non-VLAN bridged configs still work fine, tested with xm-test.
This is a patch for XenMon which only applies to the userspace tools.
The primary purpose of this patch is to add support for non-polling
access to the xen trace buffers. The hypervisor changes have already
been accepted.
Also included are a few bug fixes and some minor new features:
1. If xenmon is run without first allocating trace buffers (via
'setsize') and enabling them (via 'tbctl'), then this is done
automatically using sensible defaults.
2. There was a bug that caused the first second's worth of data output
from xenmon to be erroneous; This has been fixed.
3. There was a bug that caused xenmon to sometimes not display data for
newly created domains; This has also been fixed.
4. The xenmon display has a 'heartbeat' which flickers once per second.
This is to show that xenmon is still alive, even though the display
isn't changing at all, a situation that can happen sometimes when there
is nothing at all happening on a particular cpu.
5. Added cpu utilization display to the top of the xenmon window.
6. Added a bunch of options in xenmon to control exactly which metrics
are displayed, so the screen doesn't get cluttered with stuff you're not
interested in. The new options are:
--allocated
--noallocated
--blocked
--noblocked
--waited
--nowaited
--excount
--noexcount
--iocount
--noiocount
7. Added an option ("--cpu=N") to xenmon to specify which physical cpu
you'd like data displayed for.
8. Updated the README with information about default trace buffer size, etc.
Trivial patch to fix x86_64 builds in which XEN_TARGET_ARCH
is specified on the make command line, e.g.:
make XEN_TARGET_ARCH=x86_64
This busted the vmxassist and hvmloader builds, which must
be done -m32. Using "override" in the vmxassist/hvmloader
Makefiles fixes the problem by not allowing this to be
overridden from the command line.
Signed-off-by: Dave Lively <dlively@virtualiron.com>
New IO-APIC ACK method seems to cause problems on some systems
(e.g., Dell 1850). Disable it by default for now, but allow the
new mwethod to be tested by passing boot parameter 'new_ack'
to Xen.
You can tell which ACK method you are using because Xen prints
out "Using old ACK method" or "Using new ACK method" during boot.
This workaround can be removed if/when the problems with the new
ACK method are flushed out.
Fix Xen's interrupt acknowledgement routines on certain
(apparently broken) IO-APIC hardware:
1. Do not mask/unmask the IO-APIC pin during normal ISR
processing. This seems to have really bizarre side effects
on some chipsets.
2. Since we instead tickle the local APIC in the ->end
irq hook function, it *must* run on the CPU that
received the interrupt. Therefore we track which CPUs
need to do final acknowledgement and IPI them if
necessary to do so.
add setup_xen_features() call to setup_arch() in xenLinux/ia64
Now features.c is compiled into xenLinux/ia64 for xen_feature(),
but it is not initialized.
xenLinux/x86 calls xetup_xen_features() from setup_arch().
In some cases, say for instance for some bizzare reason
the tree was checked out of CVS, which doens't neccessarily
store file permissions, mkbuildtree may not be executable.
So run them explicitly via bash.
This fixes the Xen Makefile to allow correct building of cscope, TAGS
and tags. Prior to this the asm directory was not constructed correctly
for the "find" command. "xen\cscope.*" has been added to ".hgignore".
This is the initial patch for SMP PAE guest on x86-64 Xen.
For vcpus=2, the SMP PAE guest can do kernel build successfully.
And it improves the stability of SMP guests.
Signed-off-by: Jun Nakajima <jun.nakajima@intel.com> Signed-off-by: Xiaohui Xin xiaohui.xin@intel.com
Use copy_from_user when accessing linear page table in shadow_fault().
This is safer, and direct access may crash hypervisor by some potential
bug. Also remove some tailing space.
This patch is a big cleanup to irq.c, with only real
necessary interfaces kept now. The irq subsystem of
xen is very simple since most external devices are
controlled by dom0. Also especially there's no need
to keep CONFIG_XEN everywhere, since this file is
already out of sync of linux version for a long time.
Actually xen defines irq related structures differently
and it's worthy of creating a xen specific version here.
Another change of this patch is to remove ugly check
upon timer/ipi within irq handler. Instead now we'll
check IRQ_GUEST flag of irq_desc to decide whether
to deliver irq to guest. Now all vectors un-registered
are set with IRQ_GUEST enabled, which is identical to
current assumption. Later this flag should be set only
per guest's request. Then Xen_do_irq is not reuqired
as the result of this change.
The maximum instruction length for both x86-32 and
x86-64 is 15 bytes (including all prefixes, opcode,
ModRM, SIB, displacement, and immediate bytes).
This patch adjusts the MAX_INST_LEN to the correct
value. This should reduce the size of some variables
in the hypervisor code. This patch also does some
minor code clean-up in the vm exit handler for VMX.
When running test 5 in Memtest86+ v1.65, I got a "this opcode is not
supported", so I decided to add it. It's a compare operation, and it's
just the opposite of the already supported one (opcode 0x39), so it's
nothing spectacular. Why there's a page-fault when this instruction gets
executed, I haven't got a clue, but I have a feeling that Memtest86 is
doing something wrong :-( However, this fix may help some other code to
run too...
With this, Test 5 passes all the way through without crashing. I did see
some occassional memory errors in some other tests, and I'm not 100%
sure whether those are caused by the system or they are "real" memory
errors. At some time in the future I may get round to memory testing my
target system...
Signed off by: Mats Petersson (mats.petersson@amd.com).=20
Make event_pending() architecture-specific.
PowerPC needs this because the domain can directly modify the hardware's
"interrupts enabled" bit, and we don't want to patch Linux to replace
all those accesses to use evtchn_upcall_mask instead.
As we know, the mechanism for hypervisor to pass parameter through pointer
is not complete. Hypervisor use copy_from/to_user functions to copy parameter
to hypervisor and copy result to user, if there is a tlb miss happening and
hypervisor can't handled this. This hypercall fails, there is no mechanism to
handle this failure, that may cause domain crash. Get_pfn_list hypercall copy
large data from hypervisor to user, it is easy to trigger this issue when
creating VTI-domain.
If fails, Get_pfn_list returns the number of pfn entries, and this patch will
Dummy access parameter memory block to cause this tlb mapping tracked by
Hypervisor, then continue to do get_pfn_list.
It's a workaround before we design a new mechanism of passing parameter thr
pointer.
Before injecting fault to guest, VMM need to setup
guest itir by using guest region register.
But the lowest two bits of itir are reserved. VMM need
to reset these two bits.
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