[MODERATED] Re: The Annoying Affair - Bulletin #1

On Tue, Oct 29, 2019 at 09:14:27AM -0700, speck for mark gross wrote:
> On Mon, Oct 28, 2019 at 09:31:40AM +0100, speck for Thomas Gleixner wrote:
> > Folks,
> > 
> > I've merged the V2 of Boris' cleaned up variant of the TAA series. Thanks
> > Boris for handling that!
> > 
> > The master branch is based on v5.4-rc5 and the commits are considered
> > stable from now on. Any further tweaks need to go on top.
> > 
> > The stable branches linux-5.3.y, linux-4.19.y and linix-4.14.y have the
> > backports. These need some careful inspection and testing.
> Neelima, our testing lead, is getting her spec-list access enabled so I'm
> sending this quick note on the testing so far:
> 5.3.y backport checked out.
> 4.19.y backport is showing some issues with disabling TSX.  We are
> investigating and will report out more detail / patch update ASAP.

4.14 and 4.19 needs this change as well, 5.3 is fine.

---
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 97f79547782e..a05637f6d95b 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1497,6 +1497,7 @@ void __init identify_boot_cpu(void)
        enable_sep_cpu();
 #endif
        cpu_detect_tlb(&boot_cpu_data);
+       tsx_init();
 }
 
 void identify_secondary_cpu(struct cpuinfo_x86 *c)