Merge branch 'x86-hyperv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 hyperv update from Ingo Molnar:
 "Enable PCID support on Hyper-V guests"

* 'x86-hyperv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/hyperv: Stop suppressing X86_FEATURE_PCID

1 files changed, 10 insertions, 2 deletions

diff --git a/arch/x86/hyperv/mmu.c b/arch/x86/hyperv/mmu.c
index 9cc9e1c1e2db..56c9ebac946f 100644
--- a/arch/x86/hyperv/mmu.c
+++ b/arch/x86/hyperv/mmu.c
@@ -137,7 +137,12 @@ static void hyperv_flush_tlb_others(const struct cpumask *cpus,
         }
 
         if (info->mm) {
+                /*
+                 * AddressSpace argument must match the CR3 with PCID bits
+                 * stripped out.
+                 */
                 flush->address_space = virt_to_phys(info->mm->pgd);
+                flush->address_space &= CR3_ADDR_MASK;
                 flush->flags = 0;
         } else {
                 flush->address_space = 0;
@@ -219,7 +224,12 @@ static void hyperv_flush_tlb_others_ex(const struct cpumask *cpus,
         }
 
         if (info->mm) {
+                /*
+                 * AddressSpace argument must match the CR3 with PCID bits
+                 * stripped out.
+                 */
                 flush->address_space = virt_to_phys(info->mm->pgd);
+                flush->address_space &= CR3_ADDR_MASK;
                 flush->flags = 0;
         } else {
                 flush->address_space = 0;
@@ -278,8 +288,6 @@ void hyperv_setup_mmu_ops(void)
         if (!(ms_hyperv.hints & HV_X64_REMOTE_TLB_FLUSH_RECOMMENDED))
                 return;
 
-        setup_clear_cpu_cap(X86_FEATURE_PCID);
-
         if (!(ms_hyperv.hints & HV_X64_EX_PROCESSOR_MASKS_RECOMMENDED)) {
                 pr_info("Using hypercall for remote TLB flush\n");
                 pv_mmu_ops.flush_tlb_others = hyperv_flush_tlb_others;