Andrew Cooper f938c08494 x86/spec-ctrl: Support Intel's new PB-OPT ...

In IPU 2025.2 (May 2025), Intel have released an alternative mitigation for a
prior security issue (SA-00982) on Sapphire and Emerald Rapids CPUs.

Intel suggest that certain workloads will benefit from using the alternative
mode.  This can be selected by booting with `spec-ctrl=ibpb-alt`.

https://www.intel.com/content/www/us/en/developer/articles/technical/software-security-guidance/technical-documentation/cpuid-enumeration-and-architectural-msrs.html
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
master commit: 5873740e41
master date: 2025-05-13 14:49:12 +0100

2025-05-15 09:04:16 +02:00

..

arm

xen/arm: add support for cache coloring configuration via device-tree

2024-12-19 19:24:31 +01:00

riscv

xen/riscv: introduce extension support check by compiler

2024-04-04 12:00:17 +02:00

xen-makefiles

docs/misc: fix document typo

2023-07-20 10:03:53 +02:00

9pfs.pandoc

xen/public: move xenstore related doc into 9pfs.h

2023-02-06 08:52:15 +01:00

amd-ucode-container.txt

docs, amd_ucode: condense amd_ucode notes

2014-10-16 10:07:56 +02:00

block-scripts.txt

hotplug/FreeBSD: document disk hotplug interface

2016-04-06 15:50:45 +01:00

cache-coloring.rst

xen/arm: add Xen cache colors command line parameter

2024-12-19 19:24:31 +01:00

console.txt

xen/arm: vpl011: Update documentation for vuart console support

2017-10-03 15:23:38 -07:00

crashdb.txt

build: convert crash_debug to Kconfig

2016-06-08 14:09:16 +02:00

distro_mapping.txt

Config.mk: Remove unused setvar_dir macro

2019-12-13 16:30:34 +00:00

dump-core-format.txt

dump-core: update the documentation

2009-01-15 12:40:48 +00:00

efi.pandoc

EFI: strip xen.efi when putting it on the EFI partition

2022-07-18 17:48:40 +02:00

grant-tables.txt

gnttab: split maptrack lock to make it fulfill its purpose again

2017-08-15 15:07:25 +02:00

hvm-emulated-unplug.pandoc

docs/markdown: Switch to using pandoc, and fix underscore escaping

2019-01-02 17:50:36 +00:00

hypfs-paths.pandoc

xen/cpupool: make per-cpupool sched-gran hypfs node writable

2021-01-22 12:15:21 +01:00

kexec_and_kdump.txt

kexec: provide user friendly option for memory limit

2017-06-09 14:11:37 +02:00

libxl_memory.txt

docs: initial documentation for xenstore paths

2012-10-01 17:54:11 +01:00

livepatch.pandoc

docs/misc: Fix a few typos

2025-01-16 11:22:11 +00:00

netif-staging-grants.pandoc

docs/misc: Fix a few typos

2025-01-16 11:22:11 +00:00

printk-formats.txt

docs/misc: Fix a few typos

2025-01-16 11:22:11 +00:00

pv-drivers-lifecycle.pandoc

docs/markdown: Switch to using pandoc, and fix underscore escaping

2019-01-02 17:50:36 +00:00

pvcalls.pandoc

pvcalls: Document correctly and explicitely the padding for all arches

2020-07-10 09:52:24 -07:00

pvh.pandoc

x86/pvh: drop v2 suffix from pvh.pandoc

2020-02-25 17:21:45 +00:00

qemu-backends.txt

docs: add misc/qemu-backends.txt

2016-04-20 18:59:11 +01:00

status-override-table-spec.fodt

docs: convert STAO from odt to fodt

2017-02-15 11:40:16 -08:00

stubdom.txt

libxl: Enable stubdom cdrom changing

2024-07-30 17:51:06 +01:00

support-matrix-head.html

docs: Provide support-matrix-generate, to generate a support matrix in HTML

2018-04-12 16:13:49 +01:00

vtd-pi.txt

VT-d Posted-intterrupt (PI) design

2015-12-10 13:11:25 +01:00

vtd.txt

docs etc.: https: Fix references to wiki.xen[project].org

2020-03-30 15:27:06 +01:00

vtpm-platforms.txt

vtpmmgr: use XSM label as vTPM kernel hash

2014-04-23 11:58:26 +01:00

x86-xenpv-bootloader.pandoc

docs/markdown: Switch to using pandoc, and fix underscore escaping

2019-01-02 17:50:36 +00:00

xen_config.html

tools: vnet: Remove

2011-03-25 21:59:20 +00:00

xen-command-line.pandoc

x86/spec-ctrl: Support Intel's new PB-OPT

2025-05-15 09:04:16 +02:00

xen-env-table-spec.fodt

docs: convert XENV from odt to fodt

2017-02-15 11:40:37 -08:00

xen-error-handling.txt

docs: Add description of BUILD_BUG_ON().

2008-12-04 16:36:43 +00:00

xenmon.txt

docs: Move misc README's into docs/misc/

2015-08-27 19:14:17 +01:00

xenpaging.txt

docs: update xenpaging.txt

2012-08-30 17:57:31 +01:00

xenstore-paths.pandoc

docs: fix complex-and-wrong xenstore-path wording

2023-05-26 09:15:39 +02:00

xenstore-ring.txt

tools/xenstore: add documentation for extended watch command

2022-09-08 09:28:30 +02:00

xenstore.txt

tools/xenstore: remember global and per domain max accounting values

2023-06-07 12:10:31 +01:00

xl-psr.pandoc

docs/markdown: Switch to using pandoc, and fix underscore escaping

2019-01-02 17:50:36 +00:00

xsm-flask.txt

flask/label-pci: Allow specifying optional irq label

2023-03-14 10:46:00 +01:00