| From: Thomas Gleixner <tglx@linutronix.de> |
| Date: Mon, 4 Dec 2017 15:07:30 +0100 |
| Subject: x86/paravirt: Dont patch flush_tlb_single |
| |
| commit a035795499ca1c2bd1928808d1a156eda1420383 upstream. |
| |
| native_flush_tlb_single() will be changed with the upcoming |
| PAGE_TABLE_ISOLATION feature. This requires to have more code in |
| there than INVLPG. |
| |
| Remove the paravirt patching for it. |
| |
| Signed-off-by: Thomas Gleixner <tglx@linutronix.de> |
| Reviewed-by: Josh Poimboeuf <jpoimboe@redhat.com> |
| Reviewed-by: Juergen Gross <jgross@suse.com> |
| Acked-by: Peter Zijlstra <peterz@infradead.org> |
| Cc: Andy Lutomirski <luto@kernel.org> |
| Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> |
| Cc: Borislav Petkov <bp@alien8.de> |
| Cc: Borislav Petkov <bpetkov@suse.de> |
| Cc: Brian Gerst <brgerst@gmail.com> |
| Cc: Dave Hansen <dave.hansen@intel.com> |
| Cc: Dave Hansen <dave.hansen@linux.intel.com> |
| Cc: David Laight <David.Laight@aculab.com> |
| Cc: Denys Vlasenko <dvlasenk@redhat.com> |
| Cc: Eduardo Valentin <eduval@amazon.com> |
| Cc: Greg KH <gregkh@linuxfoundation.org> |
| Cc: H. Peter Anvin <hpa@zytor.com> |
| Cc: Linus Torvalds <torvalds@linux-foundation.org> |
| Cc: Rik van Riel <riel@redhat.com> |
| Cc: Will Deacon <will.deacon@arm.com> |
| Cc: aliguori@amazon.com |
| Cc: daniel.gruss@iaik.tugraz.at |
| Cc: hughd@google.com |
| Cc: keescook@google.com |
| Cc: linux-mm@kvack.org |
| Cc: michael.schwarz@iaik.tugraz.at |
| Cc: moritz.lipp@iaik.tugraz.at |
| Cc: richard.fellner@student.tugraz.at |
| Link: https://lkml.kernel.org/r/20171204150606.828111617@linutronix.de |
| Signed-off-by: Ingo Molnar <mingo@kernel.org> |
| [bwh: Backported to 3.2: adjust context] |
| Signed-off-by: Ben Hutchings <ben@decadent.org.uk> |
| --- |
| arch/x86/kernel/paravirt_patch_64.c | 2 -- |
| 1 file changed, 2 deletions(-) |
| |
| diff --git a/arch/x86/kernel/paravirt_patch_64.c b/arch/x86/kernel/paravirt_patch_64.c |
| index a1da6737ba5b..a91d9b9b4bde 100644 |
| --- a/arch/x86/kernel/paravirt_patch_64.c |
| +++ b/arch/x86/kernel/paravirt_patch_64.c |
| @@ -9,7 +9,6 @@ DEF_NATIVE(pv_irq_ops, save_fl, "pushfq; popq %rax"); |
| DEF_NATIVE(pv_mmu_ops, read_cr2, "movq %cr2, %rax"); |
| DEF_NATIVE(pv_mmu_ops, read_cr3, "movq %cr3, %rax"); |
| DEF_NATIVE(pv_mmu_ops, write_cr3, "movq %rdi, %cr3"); |
| -DEF_NATIVE(pv_mmu_ops, flush_tlb_single, "invlpg (%rdi)"); |
| DEF_NATIVE(pv_cpu_ops, clts, "clts"); |
| DEF_NATIVE(pv_cpu_ops, wbinvd, "wbinvd"); |
| |
| @@ -57,7 +56,6 @@ unsigned native_patch(u8 type, u16 clobbers, void *ibuf, |
| PATCH_SITE(pv_mmu_ops, read_cr3); |
| PATCH_SITE(pv_mmu_ops, write_cr3); |
| PATCH_SITE(pv_cpu_ops, clts); |
| - PATCH_SITE(pv_mmu_ops, flush_tlb_single); |
| PATCH_SITE(pv_cpu_ops, wbinvd); |
| |
| patch_site: |
| |