Gentoo Archives: gentoo-user

From:	Adam Carter <adamcarter3@×××××.com>
To:	gentoo-user@l.g.o
Subject:	Re: [gentoo-user] Where are the AMD microcode updates for spectre?
Date:	Tue, 22 May 2018 08:41:51
Message-Id:	`CAC=wYCHSpb4roukND6YugAn_nAGkSyMpidJQymcjWYOtLPTdUw@mail.gmail.com`
In Reply to:	Re: [gentoo-user] Where are the AMD microcode updates for spectre? by "Taiidan@gmx.com"

1	On Tue, May 22, 2018 at 2:47 PM, Taiidan@×××.com <Taiidan@×××.com> wrote:
2
3	> The fam15h microcode update adds IBPB
4	>
5	> * Indirect Branch Prediction Barrier (IBPB)
6	> * PRED_CMD MSR is available: YES
7	> * CPU indicates IBPB capability: YES (IBPB_SUPPORT feature bit)
8	>
9
10	My fam15 with kernel 4.16.10 and linux-firmware-20180518 confirms IBPB has
11	been added;
12
13	$ grep . /sys/devices/system/cpu/vulnerabilities/*
14	/sys/devices/system/cpu/vulnerabilities/meltdown:Not affected
15	/sys/devices/system/cpu/vulnerabilities/spectre_v1:Mitigation: __user
16	pointer sanitization
17	/sys/devices/system/cpu/vulnerabilities/spectre_v2:Mitigation: Full AMD
18	retpoline, IBPB
19
20	FWIW i saw a bunch of spectre fixes in 4.16.9
21	https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.16.9

Subject	Author
Re: [gentoo-user] Where are the AMD microcode updates for spectre?	Corbin Bird <corbinbird@×××××××.net>