On 03/08/2018 10:23 AM, Tim Chen wrote:
> On 03/07/2018 09:30 AM, Greg Kroah-Hartman wrote:
>> On Fri, Mar 02, 2018 at 01:32:09PM -0800, Tim Chen wrote:
>>> From: Andy Lutomirski <[email protected]>
>>> commit: f39681ed0f48498b80455095376f11535feea332
>>>
>>> This adds a new variable to mmu_context_t: ctx_id.
>>> ctx_id uniquely identifies the mm_struct and will never be reused.
>>>
>>> Signed-off-by: Andy Lutomirski <[email protected]>
>>> Reviewed-by: Nadav Amit <[email protected]>
>>> Reviewed-by: Thomas Gleixner <[email protected]>
>>> Cc: Andrew Morton <[email protected]>
>>> Cc: Arjan van de Ven <[email protected]>
>>> Cc: Borislav Petkov <[email protected]>
>>> Cc: Dave Hansen <[email protected]>
>>> Cc: Linus Torvalds <[email protected]>
>>> Cc: Mel Gorman <[email protected]>
>>> Cc: Peter Zijlstra <[email protected]>
>>> Cc: Rik van Riel <[email protected]>
>>> Cc: [email protected]
>>> Link:
>>> http://lkml.kernel.org/r/413a91c24dab3ed0caa5f4e4d017d87b0857f920.1498751203.git.l...@kernel.org
>>> Signed-off-by: Ingo Molnar <[email protected]>
>>> Signed-off-by: Tim Chen <[email protected]>
>>> ---
>>> arch/x86/include/asm/mmu.h | 15 +++++++++++++--
>>> arch/x86/include/asm/mmu_context.h | 5 +++++
>>> arch/x86/mm/tlb.c | 2 ++
>>> 3 files changed, 20 insertions(+), 2 deletions(-)
>>>
>>
>> Does not apply to 4.4.y :(
>>
>> Can you provide a working backport for that tree?
>>
>
> Okay. Will do. Thanks.
>
Greg,
I actually found that there are a number of dependent IBPB related patches that
haven't been
backported yet to 4.4:
x86/cpufeatures: Add AMD feature bits for Speculation Control
(cherry picked from commit 5d10cbc91d9eb5537998b65608441b592eec65e7)
x86/msr: Add definitions for new speculation control MSRs
(cherry picked from commit 1e340c60d0dd3ae07b5bedc16a0469c14b9f3410)
x86/speculation: Add basic IBPB (Indirect Branch Prediction Barrier) support
(cherry picked from commit 20ffa1caecca4db8f79fe665acdeaa5af815a24d)
x86/cpufeatures: Clean up Spectre v2 related CPUID flags
(cherry picked from commit 2961298efe1ea1b6fc0d7ee8b76018fa6c0bcef2)
And probably and a few more.
You have plans to backport these patches?
Tim
