oss-sec mailing list archives
Re: Intel hyper-threading security issues
From: Sven Schwedas <sven.schwedas () tao at>
Date: Thu, 21 Jun 2018 13:54:16 +0200
On 2018-06-21 12:28, Lukas Odzioba wrote:
2018-06-21 12:22 GMT+02:00 Lukas Odzioba <lukas.odzioba () gmail com>:If you feel like you really need that, on Linux you can dump SRAT ACPI table decompile it, remove APICID entries of "ht processors", compile it back and put into initrd. https://www.kernel.org/doc/Documentation/acpi/initrd_table_override.txtOr use cpu hotplug mechanism, which should be way more convenient: https://www.kernel.org/doc/html/v4.17/core-api/cpu_hotplug.html
Hotplug doesn't seem differentiate between HT threads and physical cores, will setting maxcpus=2 on a 2 cores+HT machine reliably disable HT, or can it disable one core and keep HT active on the other?
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Current thread:
- Intel hyper-threading security issues Loganaden Velvindron (Jun 19)
- Re: Intel hyper-threading security issues Georgi Guninski (Jun 20)
- Re: Intel hyper-threading security issues Stuart Henderson (Jun 21)
- Re: Intel hyper-threading security issues Lukas Odzioba (Jun 21)
- Re: Intel hyper-threading security issues Lukas Odzioba (Jun 21)
- Re: Intel hyper-threading security issues Sven Schwedas (Jun 21)
- Re: Intel hyper-threading security issues Solar Designer (Jun 21)
- Re: Intel hyper-threading security issues Michael Ellerman (Jun 22)
- Re: Intel hyper-threading security issues Solar Designer (Jun 22)
- Re: Intel hyper-threading security issues Seth Arnold (Jun 22)
- Re: Intel hyper-threading security issues Peter Kjellström (Jun 23)
- Re: Intel hyper-threading security issues Stuart Henderson (Jun 21)
- Re: Intel hyper-threading security issues Lukas Odzioba (Jun 21)
- Re: Intel hyper-threading security issues Georgi Guninski (Jun 20)
- Re: Intel hyper-threading security issues Gordon Tetlow (Jun 21)