cpuidle: remove unused latency_ticks member

... and code used only for initializing it.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Keir Fraser <keir@xen.org>
x86: introduce MWAIT-based, ACPI-less CPU idle driver

This is a port of Linux'es intel-idle driver serving the same purpose.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Keir Fraser <keir@xen.org>
printk: prefer %#x et at over 0x%x

Performance is not an issue with printk(), so let the function do
minimally more work and instead save a byte per affected format
specifier.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Keir Fraser <keir@xen.org>
x86: eliminate code affecting only 64-bit-incapable CPUs

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Keir Fraser <keir@xen.org>
x86: enable VIA CPU support

Newer VIA CPUs have both 64-bit and VMX support. Enable them to be
recognized for these purposes, at once stripping off any 32-bit CPU
only bits from the respective CPU support file, and adding 64-bit ones
found in recent Linux.

This particularly implies untying the VMX == Intel assumption in a few
places.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Keir Fraser <keir@xen.org>
x86: fix MWAIT-based idle driver for CPUs without ARAT

lapic_timer_{on,off} need to get initialized in this case. This in turn
requires getting HPET broadcast setup to be carried out earlier (and
hence preventing double initialization there).

Signed-off-by: Jan Beulich <jbeulich@suse.com>
x86/S3: add cache flush on secondary CPUs before going to sleep

Secondary CPUs, between doing their final memory writes (particularly
updating cpu_initialized) and getting a subsequent INIT, may not write
back all modified data. The INIT itself then causes those modifications
to be lost, so in the cpu_initialized case the CPU would find itself
already initialized, (intentionally) entering an infinite loop instead
of actually coming online.

Signed-off-by: Ben Guthro <ben@guthro.net>

Make acpi_dead_idle() call default_dead_idle() rather than duplicating
the logic there.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Keir Fraser <keir@xen.org>
Committed-by: Jan Beulich <jbeulich@suse.com>
pygrub: always append --args

If a bootloader entry in menu.lst has no additional kernel command line
options listed and the domU.cfg has 'bootargs="--args=something"' the
additional arguments from the config file are not passed to the kernel.
The reason for that incorrect behaviour is that run_grub appends arg
only if the parsed config file has arguments listed.

Fix this by appending args from image section and the config file separatly.
To avoid adding to a NoneType initialize grubcfg['args'] to an empty string.
This does not change behaviour but simplifies the code which appends the
string.

Signed-off-by: Olaf Hering <olaf@aepfle.de>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Committed-by: Ian Campbell <ian.campbell@citrix.com>
xl: resume the domain on suspend failure

The MUST macro calls exit(3) on failure but we need to cleanup and
resume.

Signed-off-by: Bastian Blank <waldi@debian.org>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Committed-by: Ian Campbell <ian.campbell@citrix.com>
tools: bump SONAMEs for changes during 4.2 development cycle.

We mostly did this as we went along, only a couple of minor number
bumps were missed http://marc.info/?l=xen-devel&m=134366054929255&w=2:
 - Bumped libxl from 1.0.0 -> 1.0.1
 - Bumped libxenstore from 3.0.1 -> 3.0.2

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Campbell <ian.campbell@citrix.com>
docs: network diagrams for the wiki

We provide two new diagrams
  docs/figs/network-{bridge,basic}.fig
which are converted to pngs by the Makefiles and intended for
consumption by http://wiki.xen.org/wiki/Xen_Networking.

This is perhaps not the ideal location for this source code but we
don't have a better one.

Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
docs: network network diagrams for the wiki (Makefile)

Add the Makefile in hg as well as git.  Sorry.

Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
docs: network network diagrams for the wiki (figs)

Add the figs in hg as well as git.  Sorry (again)!

Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
x86: enhance rsp-relative calculations

The use of "or" in GET_CPUINFO_FIELD so far wasn't ideal, as it doesn't
lend itself to folding this operation with a possibly subsequent one
(e.g. the well known mov+add=lea conversion). Split out the sub-
operations, and shorten assembly code slightly with this.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Keir Fraser <keir@xen.org>
x86: use compiler visible "add" instead of inline assembly "or" in get_cpu_info()

This follows the same idea as the previous patch, just that the effect
is much more visible here: With a half-way [dr]ecent gcc this reduced
.text size by over 12k for me.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Keir Fraser <keir@xen.org>
x86: slightly streamline __prepare_to_wait() inline assembly

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Keir Fraser <keir@xen.org>
x86: clean up interrupt stub generation

Apart from moving some code that is only used here from the header file
to the actual source one, this also
- moves interrupt[] into .init.data,
- prevents generating (unused) stubs for vectors below
  FIRST_DYNAMIC_VECTOR, and
- shortens and sanitizes the names of the stubs.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Keir Fraser <keir@xen.org>
x86: slightly improve stack trace on debug builds

As was rather obvious from crashes recently happening in stage testing,
the debug hypervisor, in that special case, has a drawback compared to
the non-debug one: When a call through a bad pointer happens, there's
no frame, and the top level (and frequently most important for
analysis) stack entry would get skipped:

(XEN) ----[ Xen-4.3-unstable  x86_64  debug=y  Not tainted ]----
(XEN) CPU:    1
(XEN) RIP:    e008:[<0000000000000000>] ???
(XEN) RFLAGS: 0000000000010046   CONTEXT: hypervisor
(XEN) rax: 0000000000000008   rbx: 0000000000000001   rcx: 0000000000000003
(XEN) rdx: 0000003db54eb700   rsi: 7fffffffffffffff   rdi: 0000000000000001
(XEN) rbp: ffff8302357e7ee0   rsp: ffff8302357e7e58   r8:  0000000000000000
(XEN) r9:  000000000000003e   r10: ffff8302357e7f18   r11: ffff8302357e7f18
(XEN) r12: ffff8302357ee340   r13: ffff82c480263980   r14: ffff8302357ee3d0
(XEN) r15: 0000000000000001   cr0: 000000008005003b   cr4: 00000000000026f0
(XEN) cr3: 00000000bf473000   cr2: 0000000000000000
(XEN) ds: 0000   es: 0000   fs: 0000   gs: 0000   ss: 0000   cs: e008
(XEN) Xen stack trace from rsp=ffff8302357e7e58:
(XEN)    ffff82c4801a3d05 ffff8302357eca70 0000000800000020 ffff82c4802ead60
(XEN)    0000000000000001 ffff8302357e7ea0 ffff82c48016bf07 0000000000000000
(XEN)    0000000000000000 ffff8302357e7ee0 fffff830fffff830 0000000000000046
(XEN)    ffff8302357e7f18 ffff82c480263980 ffff8302357e7f18 0000000000000000
(XEN)    0000000000000000 ffff8302357e7f10 ffff82c48015c2be 8302357dc0000fff
...
(XEN) Xen call trace:
(XEN)    [<0000000000000000>] ???
(XEN)    [<ffff82c48015c2be>] idle_loop+0x6c/0x7a
(XEN)
(XEN) Pagetable walk from 0000000000000000:

Since the bad pointer is being printed anyway (as part of the register
state), replace it with the top of stack value in such a case.

With the introduction of is_active_kernel_text(), use it also at the
(few) other suitable places (I intentionally didn't replace the use in
xen/arch/arm/mm.c - while it would be functionally correct, the
dependency on system_state wouldn't be from an abstract perspective).

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Keir Fraser <keir@xen.org>
x86: check remote MMIO remap permissions

When a domain is mapping pages from a different pg_owner domain, the
iomem_access checks are currently only applied to the pg_owner domain,
potentially allowing a domain with a more restrictive iomem_access
policy to have the pages mapped into its page tables. To catch this,
also check the owner of the page tables. The current domain does not
need to be checked because the ability to manipulate a domain's page
tables implies full access to the target domain, so checking that
domain's permission is sufficient.

Signed-off-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>
Committed-by: Jan Beulich <jbeulich@suse.com>
x86: vMCE emulation

This patch provides virtual MCE support to guest. It emulates a simple
and clean MCE MSRs interface to guest by faking caps to guest if needed
and masking caps if unnecessary:
1. Providing a well-defined MCG_CAP to guest, filter out un-necessary
   caps and provide only guest needed caps;
2. Disabling MCG_CTL to avoid model specific;
3. Sticking all 1's to MCi_CTL to guest to avoid model specific;
4. Enabling CMCI cap but never really inject to guest to prevent
   polling periodically;
5. Masking MSCOD field of MCi_STATUS to avoid model specific;
6. Keeping natural semantics by per-vcpu instead of per-domain
   variables;
7. Using bank1 and reserving bank0 to work around 'bank0 quirk' of some
   very old processors;
8. Cleaning some vMCE# injection logic which shared by Intel and AMD
   but useless under new vMCE implement;
9. Keeping compatilbe w/ old xen version which has been backported to
   SLES11 SP2, so that old vMCE would not blocked when migrate to new
   vMCE;

Signed-off-by: Liu, Jinsong <jinsong.liu@intel.com>

- make printing consistent (and non-exploitable)
- fix return values of intel_mce_{rd,wr}msr() for out of range banks
- miscellaneous cleanup

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Committed-by: Jan Beulich <jbeulich@suse.com>