Andrew Cooper 744807bdb0 x86/splitlock: CPUID and MSR details ...

A splitlock is an atomic operation which crosses a cache line boundary.  It
serialises operations in the cache coherency fabric and comes with a
multi-thousand cycle stall.

Intel Tremont CPUs introduce MSR_CORE_CAPS to enumerate various core-specific
features, and MSR_TEST_CTRL to adjust the behaviour in the case of a
splitlock.

Virtualising this for guests is distinctly tricky owing to the fact that
MSR_TEST_CTRL has core rather than thread scope.  In the meantime however,
prevent the MSR values leaking into guests.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Wei Liu <wl@xen.org>

2020-02-21 13:50:00 +00:00

..

.gitignore

tools/xen-ucode: Upload a microcode blob to the hypervisor

2019-08-01 18:45:13 +01:00

Makefile

tools/xen-ucode: Upload a microcode blob to the hypervisor

2019-08-01 18:45:13 +01:00

mkdeb

mkdeb: use compression level 0

2018-09-07 15:06:00 +01:00

mkhex

mkhex: Move it to tools/misc

2017-10-05 09:27:32 -04:00

mkrpm

tools/mkrpm: switch payload to gzip to reduce turnaround time

2018-09-07 15:02:06 +01:00

mktarball

mktarball: For qemu upstream, use their scripts/archive-source.sh

2018-04-17 18:21:30 +01:00

xen-cpuid.c

x86/splitlock: CPUID and MSR details

2020-02-21 13:50:00 +00:00

xen-detect.c

xen-detect: handle asprintf error

2017-06-23 16:08:40 +01:00

xen-diag.c

tools: Move ARRAY_SIZE() into xen-tools/libs.h

2018-07-04 17:25:37 +01:00

xen-hptool.c

x86/smt: Support for enabling/disabling SMT at runtime

2019-04-09 19:34:41 +01:00

xen-hvmcrash.c

tools/misc: xen-hvmcrash: New tool to attempt to crash HVM guests

2010-07-29 18:58:19 +01:00

xen-hvmctx.c

viridian: introduce struct viridian_page

2018-11-09 11:40:12 +01:00

xen-livepatch.c

livepatch: Add metadata runtime retrieval mechanism

2019-12-13 14:45:32 +00:00

xen-lowmemd.c

tools/misc: fix hypothetical buffer overflow in xen-lowmemd

2018-04-06 09:05:51 +01:00

xen-mfndump.c

tools: Move ARRAY_SIZE() into xen-tools/libs.h

2018-07-04 17:25:37 +01:00

xen-ucode.c

tools/xen-ucode: Upload a microcode blob to the hypervisor

2019-08-01 18:45:13 +01:00

xencons

bitkeeper revision 1.1159.187.78 (41c9d4768ZT219TwwhKCb8dfwHcdkA)

2004-12-22 20:09:26 +00:00

xencov_split

gcov: userspace tools to extract and split gcov data

2016-12-03 15:55:34 +00:00

xencov.c

gcov: rename sysctl and functions

2018-01-25 12:27:44 +01:00

xenlockprof.c

Various: Fix typo `reseting'

2018-10-08 15:20:18 +01:00

xenperf.c

Various: Fix typo `reseting'

2018-10-08 15:20:18 +01:00

xenpm.c

tools/libxc: allow controlling the max C-state sub-state

2019-07-22 11:35:19 +02:00

xenpvnetboot

Replace FSF street address with canonical URL

2015-07-29 11:14:07 +01:00

xensymoops

bitkeeper revision 1.1159.137.1 (41811b328SwfN4BTxZsoMM-iGa8evQ)

2004-10-28 16:15:46 +00:00

xenwatchdogd.c

xenwatchdogd: Fix build errors

2010-06-07 07:16:43 +01:00