On Fri, Mar 09, 2018 at 05:04:39PM -0800, Tim Chen wrote:
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 luto@kernel.org 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 luto@kernel.org Reviewed-by: Nadav Amit nadav.amit@gmail.com Reviewed-by: Thomas Gleixner tglx@linutronix.de Cc: Andrew Morton akpm@linux-foundation.org Cc: Arjan van de Ven arjan@linux.intel.com Cc: Borislav Petkov bp@alien8.de Cc: Dave Hansen dave.hansen@intel.com Cc: Linus Torvalds torvalds@linux-foundation.org Cc: Mel Gorman mgorman@suse.de Cc: Peter Zijlstra peterz@infradead.org Cc: Rik van Riel riel@redhat.com Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/413a91c24dab3ed0caa5f4e4d017d87b0857f920.1498751203... Signed-off-by: Ingo Molnar mingo@kernel.org Signed-off-by: Tim Chen tim.c.chen@linux.intel.com
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?
I don't, but I think someone from Amazon was looking into it, but I haven't heard from them in a few weeks. I'll gladly take patches if you have them, or at the worse case, a list like above of the git commits that are missing.
thanks,
greg k-h