Bug#1017425: [PATCH] x86/speculation: Avoid LFENCE in FILL_RETURN_BUFFER on CPUs that lack it

From: Ben Hutchings The mitigation for PBRSB includes adding LFENCE instructions to the RSB filling sequence. However, RSB filling is done on some older CPUs that don't support the LFENCE instruction. Define and use a BARRIER_NOSPEC macro which makes the LFENCE conditional on

Bug#1017425: [PATCH] x86/speculation: Avoid LFENCE in FILL_RETURN_BUFFER on CPUs that lack it

The mitigation for PBRSB includes adding LFENCE instructions to the RSB filling sequence. However, RSB filling is done on some older CPUs that don't support the LFENCE instruction. Define and use a BARRIER_NOSPEC macro which makes the LFENCE conditional on X86_FEATURE_LFENCE_RDTSC, like the

Re: linux migration to testing

Hi Ben, On 18-08-2022 23:09, Ben Hutchings wrote: For your info, s390x still fails: https://ci.debian.net/data/autopkgtest/testing/s390x/l/linux/24628411/log.gz Also for ppc64el. I noticed right after sending. These two are fixed by:

Bug#1017425: 5.10.0-17-686-pae: repeatedly crashes during initrd loading [PIII]

On Thu, 2022-08-18 at 23:11 +0300, Martin-Éric Racine wrote: > On Thu, Aug 18, 2022 at 10:59 PM Ben Hutchings wrote: > > > > Control: retitle -1 [i386] Unconditional LFENCE instructions in > > FILL_RETURN_BUFFER > > Control: tag -1 confirmed upstream > > Control: found -1 5.18.14-1 > > > > On

Re: linux migration to testing

On Mon, 2022-08-15 at 22:15 +0200, Paul Gevers wrote: > Hi Ben, > > On 01-08-2022 23:09, Ben Hutchings wrote: > > On Mon, 2022-08-01 at 22:53 +0200, Paul Gevers wrote: > > > On 01-08-2022 22:46, Ben Hutchings wrote: > > > > Could you please allow this version to enter testing despite the test > >

Bug#1017425: 5.10.0-17-686-pae: repeatedly crashes during initrd loading [PIII]

On Thu, 2022-08-18 at 21:59 +0200, Ben Hutchings wrote: > Control: retitle -1 [i386] Unconditional LFENCE instructions in > FILL_RETURN_BUFFER > Control: tag -1 confirmed upstream > Control: found -1 5.18.14-1 > > On Wed, 2022-08-17 at 11:42 +0200, Etienne Vogt wrote: > > I can confirm that this

Bug#1017425: 5.10.0-17-686-pae: repeatedly crashes during initrd loading [PIII]

On Thu, Aug 18, 2022 at 10:59 PM Ben Hutchings wrote: > > Control: retitle -1 [i386] Unconditional LFENCE instructions in > FILL_RETURN_BUFFER > Control: tag -1 confirmed upstream > Control: found -1 5.18.14-1 > > On Wed, 2022-08-17 at 11:42 +0200, Etienne Vogt wrote: > > I can confirm that this

Processed: Re: Bug#1017425: 5.10.0-17-686-pae: repeatedly crashes during initrd loading [PIII]

Processing control commands: > retitle -1 [i386] Unconditional LFENCE instructions in FILL_RETURN_BUFFER Bug #1017425 [src:linux] 5.10.0-17-686-pae: repeatedly crashes during initrd loading [PIII] Bug #1017494 [src:linux] linux-image-5.10.0-17-686-pae always attempts to kill idle task on Mobile

Bug#1017425: 5.10.0-17-686-pae: repeatedly crashes during initrd loading [PIII]

Control: retitle -1 [i386] Unconditional LFENCE instructions in FILL_RETURN_BUFFER Control: tag -1 confirmed upstream Control: found -1 5.18.14-1 On Wed, 2022-08-17 at 11:42 +0200, Etienne Vogt wrote: > I can confirm that this bug also occurs on Athlon XP systems (Generic VIA > KT333

linux_5.18.16-1~bpo11+1_source.changes is NEW

binary:affs-modules-5.18.0-0.deb11.4-4kc-malta-di is NEW. binary:affs-modules-5.18.0-0.deb11.4-5kc-malta-di is NEW. binary:affs-modules-5.18.0-0.deb11.4-loongson-3-di is NEW. binary:affs-modules-5.18.0-0.deb11.4-mips32r2el-di is NEW. binary:affs-modules-5.18.0-0.deb11.4-mips64r2el-di is NEW.

Processing of linux_5.18.16-1~bpo11+1_source.changes

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