FROMLIST: x86/paravirt: Dont patch flush_tlb_single
native_flush_tlb_single() is not just INLVPG anymore. With
X86_FEATURE_INVPCID_SINGLE and KAISER enabled it flushes also the shadow
mapping. But even with KAISER disabled flushing the particular ASID is
the right thing to do.
Remove the paravirt patching for it.
Fixes: 1fde25dc8ef4 ("x86/mm/kaiser: Use PCID feature to make user and
kernel switches faster")
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
(am from https://patchwork.kernel.org/patch/10078031/)
BUG=b:70026651
TEST=tryjob
Change-Id: Ieb9f9c4a449038ef43eb220228f4160478cd554f
Reviewed-on: https://chromium-review.googlesource.com/804015
Reviewed-by: Guenter Roeck <groeck@chromium.org>
Commit-Queue: Ke Wu <mikewu@google.com>
Tested-by: Ke Wu <mikewu@google.com>
diff --git a/arch/x86/kernel/paravirt_patch_64.c b/arch/x86/kernel/paravirt_patch_64.c
index 8aa0558..0677bf8 100644
--- a/arch/x86/kernel/paravirt_patch_64.c
+++ b/arch/x86/kernel/paravirt_patch_64.c
@@ -9,7 +9,6 @@
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");
@@ -62,7 +61,6 @@
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);
#if defined(CONFIG_PARAVIRT_SPINLOCKS) && defined(CONFIG_QUEUED_SPINLOCKS)
case PARAVIRT_PATCH(pv_lock_ops.queued_spin_unlock):
