On Mon, 15 Apr 2019, Sasha Levin wrote:

[This is an automated email]

This commit has been processed because it contains a "Fixes:" tag, fixing commit: 1f50ddb4f418 x86/speculation: Handle HT correctly on AMD.

The bot has tested the following trees: v5.0.7, v4.19.34, v4.14.111, v4.9.168, v4.4.178.

v5.0.7: Build OK! v4.19.34: Build OK! v4.14.111: Build failed! Errors: arch/x86/kernel/process.c:417:2: error: implicit declaration of function ???lockdep_assert_irqs_disabled???; did you mean ???lockdep_assert_cpus_held???? [-Werror=implicit-function-declaration]

Simply zap that line.

v4.9.168: Failed to apply! Possible dependencies: 01daf56875ee ("x86/speculation: Reorganize speculation control MSRs update") 26c4d75b2340 ("x86/speculation: Rename SSBD update functions") 5bfbe3ad5840 ("x86/speculation: Prepare for per task indirect branch speculation control")

So this lacks all the IBPB goodies.

v4.4.178: Failed to apply! Possible dependencies: 01daf56875ee ("x86/speculation: Reorganize speculation control MSRs update") 26c4d75b2340 ("x86/speculation: Rename SSBD update functions") 5bfbe3ad5840 ("x86/speculation: Prepare for per task indirect branch speculation control") cc69b3498921 ("x86/bugs: Unify x86_spec_ctrl_{set_guest,restore_host}")

Ditto.

How should we proceed with this patch?

4.14. is easy. For the dead kernels you need to talk to the kernel necrophilia cult members. :)

Thanks,

tglx