Adds support for modifying the LS_CFG MSR to enable SSBD on supporting
AMD CPUs. There needs to be locking logic for family 17h with SMT
enabled since both threads share the same MSR. Otherwise, a core just
needs to write to the LS_CFG MSR. For more information see:
https://developer.amd.com/wp
>>> On 20.07.18 at 16:57, wrote:
> --- a/xen/arch/x86/cpu/amd.c
> +++ b/xen/arch/x86/cpu/amd.c
> @@ -607,16 +607,10 @@ static void init_amd(struct cpuinfo_x86 *c)
> case 0x17: bit = 10; break;
> }
>
> - if (bit >= 0)
> - ssbd_amd_ls_cfg
On Tue, Jul 31, 2018 at 05:25:27AM -0600, Jan Beulich wrote:
> Code structure wise this looks to undo a fair part of what patch
> 1 has done. It would be nice to limit code churn.
Patch 1 stand alone just to improve reporting the capabilities of the
processor. Currently Xen doesn't mention anythi
>>> On 02.08.18 at 00:20, wrote:
> On Tue, Jul 31, 2018 at 05:25:27AM -0600, Jan Beulich wrote:
>> Code structure wise this looks to undo a fair part of what patch
>> 1 has done. It would be nice to limit code churn.
>
> Patch 1 stand alone just to improve reporting the capabilities of the
> proc
On Thu, Aug 02, 2018 at 01:09:06AM -0600, Jan Beulich wrote:
> >>> On 02.08.18 at 00:20, wrote:
> > On Tue, Jul 31, 2018 at 05:25:27AM -0600, Jan Beulich wrote:
> >> Code structure wise this looks to undo a fair part of what patch
> >> 1 has done. It would be nice to limit code churn.
> >
> > Pat
>>> On 06.08.18 at 21:07, wrote:
> On Thu, Aug 02, 2018 at 01:09:06AM -0600, Jan Beulich wrote:
>> >>> On 02.08.18 at 00:20, wrote:
>> > On Tue, Jul 31, 2018 at 05:25:27AM -0600, Jan Beulich wrote:
>> >> Code structure wise this looks to undo a fair part of what patch
>> >> 1 has done. It would b
On Tue, Aug 07, 2018 at 01:51:07AM -0600, Jan Beulich wrote:
> >>> On 06.08.18 at 21:07, wrote:
> > On Thu, Aug 02, 2018 at 01:09:06AM -0600, Jan Beulich wrote:
> >> >>> On 02.08.18 at 00:20, wrote:
> >> > On Tue, Jul 31, 2018 at 05:25:27AM -0600, Jan Beulich wrote:
> >> >> Code structure wise th
>>> On 08.08.18 at 18:43, wrote:
> On Tue, Aug 07, 2018 at 01:51:07AM -0600, Jan Beulich wrote:
>> >>> On 06.08.18 at 21:07, wrote:
>> > On Thu, Aug 02, 2018 at 01:09:06AM -0600, Jan Beulich wrote:
>> >> >>> On 02.08.18 at 00:20, wrote:
>> >> > current_cpu_data isn't available when ssbd_amd_ls_c
