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(parent: 8797d20) | patch
x86: command line option to avoid use of secondary hyper-threads
authorJan Beulich <JBeulich@suse.com>
Thu, 19 Jul 2018 10:32:43 +0000 (04:32 -0600)
committerAndrew Cooper <andrew.cooper3@citrix.com>
Thu, 19 Jul 2018 12:43:33 +0000 (13:43 +0100)
commitd8f974f1a646c0200b97ebcabb808324b288fadb
tree98e43efaca6c0533bc8ca4e1fba42ed44004d2a2tree | snapshot
parent8797d20a6ec2dd75195585a107ce345c51c0a59acommit | diff
x86: command line option to avoid use of secondary hyper-threads

Shared resources (L1 cache and TLB in particular) present a risk of
information leak via side channels. Provide a means to avoid use of
hyperthreads in such cases.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Roger Pau Monné <roger.pau@citrix.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
docs/misc/xen-command-line.markdown diff | blob | history
xen/arch/x86/setup.c diff | blob | history
xen/arch/x86/sysctl.c diff | blob | history
xen/include/asm-x86/setup.h diff | blob | history
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