Commit Graph
25250 Commits
Author SHA1 Message Date
Ian Campbell dd9f31cc4e docs: use "a4" not "a4wide" paper type for doxygen and latex
a4wide is no longer shipped in texlive.

Reported by Bastian Blank
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Committed-by: Keir Fraser <keir@xen.org>
2012-04-25 13:55:26 +01:00
Jan Beulich a6c6766868 vvmx: fix instruction decode segment limit check
- no limit check for 64-bit mode (and GS: is not special in any way)
- limit check is needed in compatibility mode
- canonical address check should instead be performed for 64-bit mode
- the last accessed byte must be within limits, not the first byte
- past the accessed range
- segment base address should be ignored for 64-bit mode unless FS: or
  GS: is in use

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Tim Deegan <tim@xen.org>
Committed-by: Keir Fraser <keir@xen.org>
2012-04-25 13:54:36 +01:00
Boris Ostrovsky 4aab59a3c5 svm: Do not intercept RDTSC(P) when TSC scaling is supported by hardware
When running in TSC_MODE_ALWAYS_EMULATE mode on processors that
support TSC scaling we don't need to intercept RDTSC/RDTSCP
instructions.

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@amd.com>
Acked-by: Wei Huang <wei.huang2@amd.com>
Tested-by: Wei Huang <wei.huang2@amd.com>
Committed-by: Keir Fraser <keir@xen.org>
2012-04-25 13:53:14 +01:00
Ian Jackson 6e1a7d28c9 Merge 2012-04-25 12:00:08 +01:00
Roger Pau Monne 5fce16c040 libxl, configure: print a warning if flex/bison are needed
This patch adds better support for both Flex and Bison, which might
be needed to compile libxl. Now configure script sets BISON and FLEX
Makefile vars if bison and flex are found, but doesn't complain if
they are not found.

Also, added some Makefile soccery to print a warning message if
Bison or Flex are needed but not found.

[ Improved the warning message slightly. -iwj ]

Signed-off-by: Roger Pau Monne <roger.pau@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2012-04-25 11:44:09 +01:00
Dieter Bloms d9abcb8495 libxl: set domain scheduling parameters while creating the domU
the domain specific scheduling parameters like cpu_weight, cap, slice, ...
will be set during creating the domain, so this parameters can be defined
in the domain config file

[ Improved the documentation wording slightly. -iwj ]

Signed-off-by: Dieter Bloms <dieter@bloms.de>
Acked-by: Ian Campbell <Ian.Campbell@citrix.com>
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2012-04-25 11:38:26 +01:00
Malcolm Crossley f1434c2e8e x86-64: Fix memory hotplug epfn upper limit test for updating the compat M2P table
The epfn is being compared to (RDWR_COMPAT_MPT_VIRT_END -
RDWR_COMPAT_MPT_VIRT_START) without a 2 bit shift, resulting in the
epfn being compared to the size of the RDWR_COMPAT_MPT table in bytes
instead of the maximum page frame number that the RDWR_COMPAT_MPT
table can map.

Signed-off-by: Malcolm Crossley <malcolm.crossley@citrix.com>
Committed-by: Jan Beulich <jbeulich@suse.com>
2012-04-25 12:35:56 +02:00
Ian Campbell 8396671c93 libxl: use libxl_domain_config_init and not memset 0
I missed a couple of memsets in 25237:31489be80c51, we need to use
libxl_domain_config_init everywhere and not memset since not all fields are
initialised to zero now (the type field in particular). This fixes an abort
with "xl list <dom>" for a specific domain due to assert(type == -1) in
libxl_domain_build_info_init_type().

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2012-04-25 11:35:42 +01:00
Christoph Egger 57c15d9691 tools/firmware: pass PYTHON as an env var to sub-makes in this subtree
This fixes the Seabios build on platforms where just "python" is not
correct, which includes NetBSD.

Signed-off-by: Christoph Egger <Christoph.Egger@amd.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2012-04-25 11:21:25 +01:00
Xudong Hao a7c6b15049 libxl: passthrough: avoid passing through devices not owned by pciback
This patch makes sure the passthrough device belongs to pciback before
allow them passthrough to the guest.  There are still many other
checks missing.

xm terminates the guest startup process when this type of condition is
found.  This patch just allows the guest to continue to boot but with
no device passthrough.

Signed-off-by: Allen Kay <allen.m.kay@intel.com>
Signed-off-by: Xudong Hao <xudong.hao@intel.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2012-04-25 11:18:45 +01:00
Andres Lagar-Cavilla 6c7b878e3c libxc: Document the sharing interface
(also make note about AMD support's experimental status)

Signed-off-by: Andres Lagar-Cavilla <andres@lagarcavilla>
Acked-by: Tim Deegan <tim@xen.org>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2012-04-24 19:06:42 +01:00
Andres Lagar-Cavilla ba2c156712 x86/mem_sharing: Clean up debugging calls
- Remove debug_mfn from the user-space interface
- Clean up errno codes

Signed-off-by: Andres Lagar-Cavilla <andres@lagarcavilla.org>
Acked-by: Tim Deegan <tim@xen.org>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2012-04-24 19:05:08 +01:00
Ian Campbell 8052d59667 libxl: provide libxl_domain_config_init.
Currently this struct is too complicated for the IDL to represent (arrays) so
for now implement by hand.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
2012-04-04 10:51:11 +01:00
George Dunlap 4d9dfa2abb [v2] xl: Don't require a config file for cpupools
Since the key information can be fairly simply put on the command-line,
there's no need to require an actual config file.

Also improve the help to cross-reference the xlcpupool.cfg manpage.

Signed-off-by: George Dunlap <george.dunlap@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
2012-04-24 18:51:56 +01:00
George Dunlap f7e9df6a86 xl, cpupools: Create empty pool if no cpus are specified
Currently, if "xl cpupool-create" is called with no cpus configured,
xl will choose a cpu at random from the list of unassigned cpus, and
if no unassigned cpus are available, it will fail.

This seems to me to be a poor interface.  For one, it makes it impossible
to create an empty cpupool using the xl command-line, except by creating
a pool and then removing the cpus from it.  For two, I don't think assigning
a random cpu is a feature; it's not unreasonable for the user to specify
which cpus to add to which pools.

This patch changes the behavior of "xl cpupool-create" to create an empty
pool if no cpus are specified.  I believe this interface to be more expected
and more script-friendly.

Signed-off-by: George Dunlap <george.dunlap@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
2012-04-24 18:51:56 +01:00
Ian Campbell b010719a06 libxl: make most libxl_FOO_path() functions internal.
Only libxl_xen_config_dir_path and libxl_lock_dir_path are used outside the
library. Also bindir, sbindir, sharedir and xenpagingdir appeared to be
completely unused so nuke them.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
2012-04-12 09:12:58 +01:00
Roger Pau Monne b67510ccbc autoconf: use python-config when present, if not switch to distuti
Use python-config utility when possible, and if it is not present switch to
distutils.

Should fix the bug reported by Olaf Hering on SuSE.

Signed-off-by: Roger Pau Monne <roger.pau@citrix.com>
Tested-by: Olaf Hering <olaf@aepfle.de>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2012-04-24 18:42:24 +01:00
Ian Campbell 2403a1d707 libxl: mark internal functions hidden
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2012-04-24 18:40:15 +01:00
Tim Deegan 87b3ab022c tools: Fix FPU save area definition in xen-hvmctx
Reported-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: Tim Deegan <tim@xen.org>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2012-04-24 18:39:18 +01:00
Roger Pau Monne 42488368c4 tools/build: fix distclean
distclean removed config/Tools.mk which was needed by tools/Rules.mk, thus
preventing distclean from running properly in the tools directory. This patch
only enforces config/Tools.mk presence when not performing a clean/distclean
target

Signed-off-by: Roger Pau Monne <roger.pau@citrix.com>
Cc: George Dunlap <george.dunlap@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2012-04-24 18:20:07 +01:00
Aravindh Puthiyaparambil 17c220657a tools: xen-access: Check return values and clean up on errors during init
Check the return values of the libxc mem_access calls.  Free allocated
structures (platform_info, domain_info) on errors during
initialization and exit.  Unbind VIRQ, close event channel and
connection to Xen on errors during initialization

Signed-off-by: Aravindh Puthiyaparambil <aravindh@virtuata.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2012-04-24 18:17:51 +01:00
Christoph Egger 1b06fa4b19 tools/blktap: fix build error w/o MEMSHR
Do not include memshr.h when MEMSHR is not defined.
Fixes build error when MEMSHR is disabled.

Signed-off-by: Christoph Egger <Christoph.Egger@amd.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2012-04-24 18:16:30 +01:00
Lin Ming abddd66b10 libxl: fix rtc_timeoffset setting
libxl__domain_build_info_setdefault may be called several times,
so rtc_timeoffset can't be setted in it.

Move rtc_timeoffset setting logic to libxl__build_pre.

Reported-by: Teck Choon Giam <giamteckchoon@gmail.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Lin Ming <mlin@ss.pku.edu.cn>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
---
 tools/libxl/libxl_create.c |    9 ---------
 tools/libxl/libxl_dom.c    |   17 +++++++++++++++--
 2 files changed, 15 insertions(+), 11 deletions(-)
2012-04-24 17:45:45 +01:00
Ian Campbell e601453ce6 libxl: Remove libxl_tmem_destroy and associated xl command
Dan Magenheimer explains in <4c2f7fca-dda2-4598-aaab-3a6a3fe532cd@default>:

	I think the tmem_destroy functionality pre-dates the
	existence of tmem "freeable" memory* and was a way for
	a toolset to force the hypervisor to free up the hypervisor
	memory used by some or all ephemeral tmem pools.  Once the
	tmem allocation/free process was directly linked into
	alloc_heap_pages() in the hypervisor (see call to
	tmem_relinquish_pages()), this forcing function was
	no longer needed.

	So, bottom line, I *think* it can be ripped out, or at least
	for now removed from the definition of the stable xl API/UI.
	The libxl.c routine libxl_tmem_destroy() could also be
	removed if you like, but I guess I'd prefer to leave the
	lower level droppings in xc.c and in the hypervisor in case
	I am misremembering.

Accordingly remove this interface from libxl and xl but don't touch libxc or
the hypervisor.

This is the only libxl_tmem_* function which might potentially have required
conversion to be asynchronous and which therefore might have been a potential
API stability concern.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
Acked-by: Dan Magenheimer <dan.magenheimer@oracle.com>
2012-04-16 16:00:47 +01:00
Roger Pau Monne 663448101e autoconf: add ovmf, rombios and seabios and configure options
Move this hardcoded options from Config.mk to config/Tools.mk and add the
appropiate configure options.

Signed-off-by: Roger Pau Monne <roger.pau@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2012-04-24 17:28:37 +01:00
Mathieu Gagne 5a60c9c012 xl: add "check-xl-vif-parse" test script
This test script runs "xl -N network-attach 0 <foobar>" against various
rate syntax and checks that the output is as expected.

[ Added entries to .hgignore and .gitignore for tools/libxl/tmp.* -iwj ]

Signed-off-by: Mathieu Gagne <mgagne@iweb.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2012-04-24 17:12:22 +01:00
Mathieu Gagne deaed905da xl: add support for vif rate limiting
The `rate` keyword specifies the rate at which the outgoing traffic
will be limited to. The default if this keyword is not specified
is unlimited.

The `rate` keyword supports an optional replenishment interval
parameter for specifying the granularity of credit replenishment.
It determines the frequency at which the vif transmission credit
is replenished. The default interval is 50ms.

For example:

        'rate=10Mb/s'
        'rate=250KB/s'
        'rate=1MB/s@20ms'

Signed-off-by: Mathieu Gagne <mgagne@iweb.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2012-04-24 17:09:22 +01:00
Stefano Stabellini 9684ac597a libxl: use qemu-xen with PV guests by default
qemu-xen offers better disk performances than qemu-xen-traditional
because it supports Linux native AIO: use it for PV guests if it is
available.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2012-04-24 15:48:50 +01:00
Aravindh Puthiyaparambil 8a2a58e21e libxc: Replace alloca() with mmap() for large array sizes
Replace alloca() with mmap() for array sizes greater than a page in
xc_linux_osdep.c.

When mapping in large amounts of pages (in the GB range) from a guest
in to Dom0 using xc_map_foreign_bulk(), a segfault occurs in the libxc
client application. This is because the pfn array in
linux_privcmd_map_foreign_bulk() is being allocated using alloca() and
the subsequent memcpy causes the stack to blow. This patch replaces
the alloca() with mmap() for pfn array sizes greater than a page.

Fix an error print with the correct function name.

Do the same for the map array in linux_gnttab_grant_map()

Signed-off-by: Aravindh Puthiyaparambil <aravindh@virtuata.com>
Acked-by: Andres Lagar-Cavilla <andres@lagarcavilla.org>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2012-04-24 14:31:36 +01:00
Fabio Fantoni c9cca66b8d Makefile: Some updates to uninstall
Signed-off-by: Fabio Fantoni <fabio.fantoni@heliman.it>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
2012-04-23 10:26:55 +02:00
Tim Deegan abbcefcd9f x86: restore vcpu_destroy_pagetables() call on HVM domain teardown.
HVM vcpus that are using shadow pagetables have valid guest_table fields,
which need to be tidied up on domain teardown.

Signed-off-by: Tim Deegan <tim@xen.org>
Acked-by: Jan Beulich <jbeulich@suse.com>
Committed-by: Tim Deegan <tim@xen.org>
2012-04-20 09:49:06 +01:00
Aravindh Puthiyaparambil f5a7804a18 vmx: Allow software (user defined) interrupts to be injected in to the guest
If xc_hvm_inject_trap() is called on a software (user defined)
interrupt, it causes the guest to crash with a vmentry failure. The
following patch fixes this issue.

Signed-off-by: Aravindh Puthiyaparambil <aravindh@virtuata.com>
Committed-by: Keir Fraser <keir@xen.org>
2012-04-20 09:43:46 +01:00
Keir Fraser 0a1e25103a Clean up convoluted hvm_inject_exception() logic.
Signed-off-by: Keir Fraser <keir@xen.org>
2012-04-20 09:33:35 +01:00
Tim Deegan b8adc35579 x86/mm: fix parens in mm lock level check
Signed-off-by: Tim Deegan <tim@xen.org>
Acked-by: Andres Lagar-Cavilla <andres@lagarcavilla.org>
Committed-by: Tim Deegan <tim@xen.org>
2012-04-19 15:30:44 +01:00
Tim Deegan 4784ab249a x86/mm: BUG() rather than panic() on mm lock order violations
That gives us a backtrace showing where the bad lock happens.

Reported-by: Andres Lagar-Cavilla <andres@lagarcavilla.org
Signed-off-by: Tim Deegan <tim@xen.org>
Acked-by: Andres Lagar-Cavilla <andres@lagarcavilla.org>
Committed-by: Tim Deegan <tim@xen.org>
2012-04-18 16:43:13 +01:00
Andres Lagar-Cavilla 2e38194c86 x86/mm/shadow: enclose an OOS function in the proper conditional ifdef
Otherwise compilation fails if the feature is disabled.

Signed-off-by: Andres Lagar-Cavilla <andres@lagarcavilla.org>
Acked-By: Gianluca Guida <gianluca.guida@citrix.com>
Committed-by: Tim Deegan <tim@xen.org>
2012-04-18 16:49:55 +01:00
Andres Lagar-Cavilla 11d33c39eb x86/mm/sharing: Clean ups for relinquishing shared pages on destroy
When a domain is destroyed, its pages are freed in relinquish_resources in a
preemptible mode, in the context of a synchronous domctl.

P2m entries pointing to shared pages are, however, released during p2m cleanup
in an RCU callback, and in non-preemptible mode.

This is an O(n) operation for a very large n, which may include actually
freeing shared pages for which the domain is the last holder.

To improve responsiveness, move this operation to the preemtible portion of
domain destruction, during the synchronous domain_kill hypercall. And remove
the bulk of the work from the RCU callback.

Signed-off-by: Andres Lagar-Cavilla <andres@lagarcavilla.org>
Acked-by: Tim Deegan <tim@xen.org>
Committed-by: Tim Deegan <tim@xen.org>
2012-04-18 13:38:47 +01:00
Aravindh Puthiyaparambil 07e4376ae0 mem_access: fix setting default mem_access type
When xc_hvm_set_mem_access(xch, domain_id, default_access, ~0ull, 0)
is called, first_pfn=~0ull is a hint to HVMOP_set_mem_access as to
what the default mem_access type is for the domain. This call was
failing because it was gated by the memory range check in the
HVMOP_set_mem_access case statement in do_hvm_op(). The following
patch fixes this issue.

Signed-off-by: Aravindh Puthiyaparambil <aravindh@virtuata.com>
Acked-by: Tim Deegan <tim@xen.org>
Committed-by: Tim Deegan <tim@xen.org>

---
 xen/arch/x86/hvm/hvm.c |  5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)
2012-04-18 13:38:47 +01:00
Andres Lagar-Cavilla 274075f331 x86/mm: Fix locking on hap enable failure
If enabling hap fails due to out of memory, the locking on the clean up path is
broken.

Signed-off-by: Andres Lagar-Cavilla <andres@lagarcavilla.org>
Acked-by: Tim Deegan <tim@xen.org>
Committed-by: Tim Deegan <tim@xen.org>
2012-04-18 13:38:47 +01:00
Andres Lagar-Cavilla 282ea217a7 x86/mem_event: Fix foreign domain flag in grab_slot
Signed-off-by: Andres Lagar-Cavilla <andres@lagarcavilla.org>
Acked-by: Tim Deegan <tim@xen.org>
Committed-by: Tim Deegan <tim@xen.org>
2012-04-18 13:38:47 +01:00
Mathieu Gagne 0fc13df6b8 xl: xl network-attach -N (dry run) option
Add dryrun for testing and debugging purposes.

Signed-off-by: Mathieu Gagne <mgagne@iweb.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
2012-04-17 19:13:52 +01:00
Mathieu Gagne fd7ac19749 xl: cleanup indentation
Signed-off-by: Mathieu Gagne <mgagne@iweb.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
2012-04-17 19:13:19 +01:00
Anthony PERARD 8584897de2 libxl: Query VNC listening port through QMP
Currently `xl vncviewer $dom` does not work because the VNC port is not
registered in xenstore when using qemu-upstream. This patch attempted to fix
this.

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2012-04-17 18:22:49 +01:00
Ian Jackson 39f6fa22f4 Merge 2012-04-17 18:19:12 +01:00
Olaf Hering 75f1b60ed0 tools/libvchan: Remove unwanted debugging code
-O2 -Wall -Werror triggers these warnings:

io.c: In function 'do_send':
io.c:196: warning: ignoring return value of 'writev', declared with attribute warn_unused_result
io.c: In function 'do_recv':
io.c:287: warning: ignoring return value of 'writev', declared with attribute warn_unused_result

writev to -1 will always fail, silence the warning by removing the offending
(disabled) debug code.

Signed-off-by: Olaf Hering <olaf@aepfle.de>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2012-04-17 18:18:49 +01:00
Jan Beulich 236b2f5b9b x86-64: fix updating of UREGS_rip when converting sysenter to #GP
(I spotted this copy-and-paste mistake only when backporting c/s
25200:80f4113be500 to 4.1 and 4.0.)

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Keir Fraser <keir@xen.org>
2012-04-17 17:17:05 +02:00
Jan Beulich 5768aa97b5 x86: suppress warning messages on IO-APIC-less systems
Each call to mp_register_gsi() so far produced two warnings (about not
being able to find the corresponding IO-APIC pin).

However, we should use the provided information for setting the ELCR
correctly (we might want to even do this when there is an IO-APIC, if
was absolutely certain that all machines really have this register
[and specifically not some other device at the two I/O ports in
question]). It is in any case questionable that we allow Dom0 to set
this register - it could particularly be the interrupt of a plug-in
serial port card that might not work due to this. The problem is that
all Dom0 kernels to date do so, hence we can't simply #GP on such an
access (which would be the result if we disallowed access to the port
as we should have done from the beginning).

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Keir Fraser <keir@xen.org>
2012-04-17 15:37:05 +02:00
Jan Beulich 98729f42a0 x86/IO-APIC: adjust an otherwise pretty useless message
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Keir Fraser <keir@xen.org>
2012-04-17 15:36:34 +02:00
Suresh Siddha 9facd54a45 x86/ioapic: Add register level checks to detect bogus io-apic entries
With the recent changes to clear_IO_APIC_pin() which tries to
clear remoteIRR bit explicitly, some of the users started to see
"Unable to reset IRR for apic .." messages.

Close look shows that these are related to bogus IO-APIC entries
which returns all 1s for their io-apic registers. And the
above mentioned error messages are benign. But kernel should
have ignored such io-apic's in the first place.

Check if register 0, 1, 2 of the listed io-apic are all 1s and
ignore such io-apic.

[original Linux patch:]
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Keir Fraser <keir@xen.org>
Committed-by: Jan Beulich <jbeulich@suse.com>
2012-04-17 15:35:39 +02:00
Jan Beulich 63a9a8edb9 x86-64: fix #GP generation in assembly code
When guest use of sysenter (64-bit PV guest) or syscall (32-bit PV
guest) gets converted into a GP fault (due to no callback having got
registered), we must
- honor the GP fault handler's request the keep enabled or mask event
  delivery
- not allow TBF_EXCEPTION to remain set past the generation of the
  (guest) exception in the vCPU's trap_bounce.flags, as that would
  otherwise allow for the next exception occurring in guest mode,
  should it happen to get handled in Xen itself, to nevertheless get
  bounced to the guest kernel.

Also, just like compat mode syscall handling already did, native mode
sysenter handling should, when converting to #GP, subtract 2 from the
RIP present in the frame so that the guest's GP fault handler would
see the fault pointing to the offending instruction instead of past it.

Finally, since those exception generating code blocks needed to be
modified anyway, convert them to make use of UNLIKELY_{START,END}().

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Keir Fraser <keir@xen.org>
2012-04-17 15:33:53 +02:00