Index: sys/amd64/amd64/apic_vector.S
===================================================================
--- sys/amd64/amd64/apic_vector.S
+++ sys/amd64/amd64/apic_vector.S
@@ -185,8 +185,12 @@
 	jmp	invltlb_ret
 
 	INTR_HANDLER invltlb_invpcid
+	cmpb	$0,pti(%rip)
+	jne	1f
 	call	invltlb_invpcid_handler
 	jmp	invltlb_ret
+1:	call	invltlb_invpcid_pti_handler
+	jmp	invltlb_ret
 
 /*
  * Single page TLB shootdown
@@ -195,6 +199,14 @@
 	call	invlpg_handler
 	jmp	invltlb_ret
 
+	INTR_HANDLER invlpg_invpcid_pti
+	call	invlpg_invpcid_pti_handler
+	jmp	invltlb_ret
+
+	INTR_HANDLER invlpg_pcid_pti
+	call	invlpg_pcid_pti_handler
+	jmp	invltlb_ret
+
 /*
  * Page range TLB shootdown.
  */
@@ -202,6 +214,14 @@
 	call	invlrng_handler
 	jmp	invltlb_ret
 
+	INTR_HANDLER invlrng_invpcid_pti
+	call	invlrng_invpcid_pti_handler
+	jmp	invltlb_ret
+
+	INTR_HANDLER invlrng_pcid_pti
+	call	invlrng_pcid_pti_handler
+	jmp	invltlb_ret
+
 /*
  * Invalidate cache.
  */
Index: sys/amd64/amd64/mp_machdep.c
===================================================================
--- sys/amd64/amd64/mp_machdep.c
+++ sys/amd64/amd64/mp_machdep.c
@@ -135,18 +135,27 @@
 		if (invpcid_works) {
 			setidt(IPI_INVLTLB, pti ? IDTVEC(invltlb_invpcid_pti) :
 			    IDTVEC(invltlb_invpcid), SDT_SYSIGT, SEL_KPL, 0);
+			setidt(IPI_INVLPG, pti ? IDTVEC(invlpg_invpcid_pti_pti) :
+			    IDTVEC(invlpg), SDT_SYSIGT, SEL_KPL, 0);
+			setidt(IPI_INVLRNG, pti ?
+			    IDTVEC(invlrng_invpcid_pti_pti) : IDTVEC(invlrng),
+			    SDT_SYSIGT, SEL_KPL, 0);
 		} else {
 			setidt(IPI_INVLTLB, pti ? IDTVEC(invltlb_pcid_pti) :
 			    IDTVEC(invltlb_pcid), SDT_SYSIGT, SEL_KPL, 0);
+			setidt(IPI_INVLPG, pti ? IDTVEC(invlpg_pcid_pti_pti) :
+			    IDTVEC(invlpg), SDT_SYSIGT, SEL_KPL, 0);
+			setidt(IPI_INVLRNG, pti ? IDTVEC(invlrng_pcid_pti_pti) :
+			    IDTVEC(invlrng), SDT_SYSIGT, SEL_KPL, 0);
 		}
 	} else {
 		setidt(IPI_INVLTLB, pti ? IDTVEC(invltlb_pti) : IDTVEC(invltlb),
 		    SDT_SYSIGT, SEL_KPL, 0);
+		setidt(IPI_INVLPG, pti ? IDTVEC(invlpg_pti) : IDTVEC(invlpg),
+		    SDT_SYSIGT, SEL_KPL, 0);
+		setidt(IPI_INVLRNG, pti ? IDTVEC(invlrng_pti) : IDTVEC(invlrng),
+		    SDT_SYSIGT, SEL_KPL, 0);
 	}
-	setidt(IPI_INVLPG, pti ? IDTVEC(invlpg_pti) : IDTVEC(invlpg),
-	    SDT_SYSIGT, SEL_KPL, 0);
-	setidt(IPI_INVLRNG, pti ? IDTVEC(invlrng_pti) : IDTVEC(invlrng),
-	    SDT_SYSIGT, SEL_KPL, 0);
 
 	/* Install an inter-CPU IPI for cache invalidation. */
 	setidt(IPI_INVLCACHE, pti ? IDTVEC(invlcache_pti) : IDTVEC(invlcache),
@@ -439,10 +448,39 @@
 	PCPU_SET(smp_tlb_done, generation);
 }
 
+void
+invltlb_invpcid_pti_handler(void)
+{
+	struct invpcid_descr d;
+	uint32_t generation;
+
+#ifdef COUNT_XINVLTLB_HITS
+	xhits_gbl[PCPU_GET(cpuid)]++;
+#endif /* COUNT_XINVLTLB_HITS */
+#ifdef COUNT_IPIS
+	(*ipi_invltlb_counts[PCPU_GET(cpuid)])++;
+#endif /* COUNT_IPIS */
+
+	generation = smp_tlb_generation;
+	d.pcid = smp_tlb_pmap->pm_pcids[PCPU_GET(cpuid)].pm_pcid;
+	d.pad = 0;
+	d.addr = 0;
+	if (smp_tlb_pmap == kernel_pmap) {
+		invpcid(&d, INVPCID_CTXGLOB);
+	} else {
+		invpcid(&d, INVPCID_CTX);
+		d.pcid |= PMAP_PCID_USER_PT;
+		invpcid(&d, INVPCID_CTX);
+	}
+	PCPU_SET(smp_tlb_done, generation);
+}
+
 void
 invltlb_pcid_handler(void)
 {
+	uint64_t kcr3, ucr3;
 	uint32_t generation;
+	u_int cpuid;
   
 #ifdef COUNT_XINVLTLB_HITS
 	xhits_gbl[PCPU_GET(cpuid)]++;
@@ -463,9 +501,137 @@
 		 * CPU.
 		 */
 		if (PCPU_GET(curpmap) == smp_tlb_pmap) {
-			load_cr3(smp_tlb_pmap->pm_cr3 |
-			    smp_tlb_pmap->pm_pcids[PCPU_GET(cpuid)].pm_pcid);
+			cpuid = PCPU_GET(cpuid);
+			kcr3 = smp_tlb_pmap->pm_cr3 | smp_tlb_pmap->pm_pcids[
+			    cpuid].pm_pcid;
+			if (pti) {
+				ucr3 = smp_tlb_pmap->pm_ucr3 |
+				    PMAP_PCID_USER_PT |
+				    smp_tlb_pmap->pm_pcids[cpuid].pm_pcid;
+				pmap_pti_pcid_invalidate(ucr3, kcr3);
+			} else
+				load_cr3(kcr3);
 		}
 	}
 	PCPU_SET(smp_tlb_done, generation);
 }
+
+void
+invlpg_invpcid_pti_handler(void)
+{
+	struct invpcid_descr d;
+	uint32_t generation;
+
+#ifdef COUNT_XINVLTLB_HITS
+	xhits_pg[PCPU_GET(cpuid)]++;
+#endif /* COUNT_XINVLTLB_HITS */
+#ifdef COUNT_IPIS
+	(*ipi_invlpg_counts[PCPU_GET(cpuid)])++;
+#endif /* COUNT_IPIS */
+
+	generation = smp_tlb_generation;	/* Overlap with serialization */
+	invlpg(smp_tlb_addr1);
+	if (smp_tlb_pmap != kernel_pmap) {
+		d.pcid = smp_tlb_pmap->pm_pcids[PCPU_GET(cpuid)].pm_pcid |
+		    PMAP_PCID_USER_PT;
+		d.pad = 0;
+		d.addr = smp_tlb_addr1;
+		invpcid(&d, INVPCID_ADDR);
+	}
+	PCPU_SET(smp_tlb_done, generation);
+}
+
+void
+invlpg_pcid_pti_handler(void)
+{
+	uint64_t kcr3, ucr3;
+	uint32_t generation;
+	u_int cpuid;
+
+#ifdef COUNT_XINVLTLB_HITS
+	xhits_pg[PCPU_GET(cpuid)]++;
+#endif /* COUNT_XINVLTLB_HITS */
+#ifdef COUNT_IPIS
+	(*ipi_invlpg_counts[PCPU_GET(cpuid)])++;
+#endif /* COUNT_IPIS */
+
+	generation = smp_tlb_generation;	/* Overlap with serialization */
+	invlpg(smp_tlb_addr1);
+	if (smp_tlb_pmap != kernel_pmap) {
+		cpuid = PCPU_GET(cpuid);
+		kcr3 = smp_tlb_pmap->pm_cr3 | smp_tlb_pmap->pm_pcids[cpuid].
+		    pm_pcid | CR3_PCID_SAVE;
+		ucr3 = smp_tlb_pmap->pm_ucr3 | smp_tlb_pmap->pm_pcids[cpuid].
+		    pm_pcid | PMAP_PCID_USER_PT | CR3_PCID_SAVE;
+		pmap_pti_pcid_invlpg(ucr3, kcr3, smp_tlb_addr1);
+	}
+	PCPU_SET(smp_tlb_done, generation);
+}
+
+void
+invlrng_invpcid_pti_handler(void)
+{
+	struct invpcid_descr d;
+	vm_offset_t addr, addr2;
+	uint32_t generation;
+
+#ifdef COUNT_XINVLTLB_HITS
+	xhits_rng[PCPU_GET(cpuid)]++;
+#endif /* COUNT_XINVLTLB_HITS */
+#ifdef COUNT_IPIS
+	(*ipi_invlrng_counts[PCPU_GET(cpuid)])++;
+#endif /* COUNT_IPIS */
+
+	addr = smp_tlb_addr1;
+	addr2 = smp_tlb_addr2;
+	generation = smp_tlb_generation;	/* Overlap with serialization */
+	do {
+		invlpg(addr);
+		addr += PAGE_SIZE;
+	} while (addr < addr2);
+	if (smp_tlb_pmap != kernel_pmap) {
+		d.pcid = smp_tlb_pmap->pm_pcids[PCPU_GET(cpuid)].pm_pcid |
+		    PMAP_PCID_USER_PT;
+		d.pad = 0;
+		d.addr = smp_tlb_addr1;
+		do {
+			invpcid(&d, INVPCID_ADDR);
+			d.addr += PAGE_SIZE;
+		} while (d.addr < addr2);
+	}
+	PCPU_SET(smp_tlb_done, generation);
+}
+
+void
+invlrng_pcid_pti_handler(void)
+{
+	vm_offset_t addr, addr2;
+	uint64_t kcr3, ucr3;
+	uint32_t generation;
+	u_int cpuid;
+
+#ifdef COUNT_XINVLTLB_HITS
+	xhits_rng[PCPU_GET(cpuid)]++;
+#endif /* COUNT_XINVLTLB_HITS */
+#ifdef COUNT_IPIS
+	(*ipi_invlrng_counts[PCPU_GET(cpuid)])++;
+#endif /* COUNT_IPIS */
+
+	addr = smp_tlb_addr1;
+	addr2 = smp_tlb_addr2;
+	generation = smp_tlb_generation;	/* Overlap with serialization */
+	do {
+		invlpg(addr);
+		addr += PAGE_SIZE;
+	} while (addr < addr2);
+	if (smp_tlb_pmap != kernel_pmap) {
+		cpuid = PCPU_GET(cpuid);
+		kcr3 = smp_tlb_pmap->pm_cr3 | smp_tlb_pmap->pm_pcids[cpuid].
+		    pm_pcid | CR3_PCID_SAVE;
+		ucr3 = smp_tlb_pmap->pm_ucr3 | smp_tlb_pmap->pm_pcids[cpuid].
+		    pm_pcid | CR3_PCID_SAVE;
+		pmap_pti_pcid_invlrng(ucr3, kcr3, smp_tlb_addr1, addr2);
+	}
+
+	PCPU_SET(smp_tlb_done, generation);
+}
Index: sys/amd64/amd64/pmap.c
===================================================================
--- sys/amd64/amd64/pmap.c
+++ sys/amd64/amd64/pmap.c
@@ -1060,6 +1060,7 @@
 	PMAP_LOCK_INIT(kernel_pmap);
 	kernel_pmap->pm_pml4 = (pdp_entry_t *)PHYS_TO_DMAP(KPML4phys);
 	kernel_pmap->pm_cr3 = KPML4phys;
+	kernel_pmap->pm_ucr3 = PMAP_NO_CR3;
 	CPU_FILL(&kernel_pmap->pm_active);	/* don't allow deactivation */
 	TAILQ_INIT(&kernel_pmap->pm_pvchunk);
 	kernel_pmap->pm_flags = pmap_flags;
@@ -1097,8 +1098,6 @@
 	pmap_init_pat();
 
 	/* Initialize TLB Context Id. */
-	if (pti)
-		pmap_pcid_enabled = 0;
 	TUNABLE_INT_FETCH("vm.pmap.pcid_enabled", &pmap_pcid_enabled);
 	if ((cpu_feature2 & CPUID2_PCID) != 0 && pmap_pcid_enabled) {
 		/* Check for INVPCID support */
@@ -1576,6 +1575,8 @@
 pmap_invalidate_page(pmap_t pmap, vm_offset_t va)
 {
 	cpuset_t *mask;
+	struct invpcid_descr d;
+	uint64_t kcr3, ucr3;
 	u_int cpuid, i;
 
 	if (pmap_type_guest(pmap)) {
@@ -1592,9 +1593,27 @@
 		mask = &all_cpus;
 	} else {
 		cpuid = PCPU_GET(cpuid);
-		if (pmap == PCPU_GET(curpmap))
+		if (pmap == PCPU_GET(curpmap)) {
 			invlpg(va);
-		else if (pmap_pcid_enabled)
+			if (pmap_pcid_enabled && pti) {
+				critical_enter();
+				if (invpcid_works) {
+					d.pcid = pmap->pm_pcids[cpuid].pm_pcid |
+					    PMAP_PCID_USER_PT;
+					d.pad = 0;
+					d.addr = va;
+					invpcid(&d, INVPCID_ADDR);
+				} else {
+					kcr3 = pmap->pm_cr3 | pmap->pm_pcids[
+					    cpuid].pm_pcid | CR3_PCID_SAVE;
+					ucr3 = pmap->pm_ucr3 | pmap->pm_pcids[
+					    cpuid].pm_pcid | PMAP_PCID_USER_PT |
+					    CR3_PCID_SAVE;
+					pmap_pti_pcid_invlpg(ucr3, kcr3, va);
+				}
+				critical_exit();
+			}
+		} else if (pmap_pcid_enabled)
 			pmap->pm_pcids[cpuid].pm_gen = 0;
 		if (pmap_pcid_enabled) {
 			CPU_FOREACH(i) {
@@ -1604,7 +1623,7 @@
 		}
 		mask = &pmap->pm_active;
 	}
-	smp_masked_invlpg(*mask, va);
+	smp_masked_invlpg(*mask, va, pmap);
 	sched_unpin();
 }
 
@@ -1615,7 +1634,9 @@
 pmap_invalidate_range(pmap_t pmap, vm_offset_t sva, vm_offset_t eva)
 {
 	cpuset_t *mask;
+	struct invpcid_descr d;
 	vm_offset_t addr;
+	uint64_t kcr3, ucr3;
 	u_int cpuid, i;
 
 	if (eva - sva >= PMAP_INVLPG_THRESHOLD) {
@@ -1641,6 +1662,28 @@
 		if (pmap == PCPU_GET(curpmap)) {
 			for (addr = sva; addr < eva; addr += PAGE_SIZE)
 				invlpg(addr);
+			if (pmap_pcid_enabled && pti) {
+				critical_enter();
+				if (invpcid_works) {
+					d.pcid = pmap->pm_pcids[cpuid].
+					    pm_pcid | PMAP_PCID_USER_PT;
+					d.pad = 0;
+					d.addr = sva;
+					for (; d.addr < eva; d.addr +=
+					    PAGE_SIZE)
+						invpcid(&d, INVPCID_ADDR);
+				} else {
+					kcr3 = pmap->pm_cr3 | pmap->pm_pcids[
+					    cpuid].pm_pcid | CR3_PCID_SAVE;
+					ucr3 = pmap->pm_ucr3 | pmap->pm_pcids[
+					    cpuid].pm_pcid | PMAP_PCID_USER_PT |
+					    CR3_PCID_SAVE;
+					pmap_pti_pcid_invlrng(ucr3, kcr3, sva,
+					    eva);
+				}
+				critical_exit();
+			}
+
 		} else if (pmap_pcid_enabled) {
 			pmap->pm_pcids[cpuid].pm_gen = 0;
 		}
@@ -1652,7 +1695,7 @@
 		}
 		mask = &pmap->pm_active;
 	}
-	smp_masked_invlpg_range(*mask, sva, eva);
+	smp_masked_invlpg_range(*mask, sva, eva, pmap);
 	sched_unpin();
 }
 
@@ -1661,6 +1704,7 @@
 {
 	cpuset_t *mask;
 	struct invpcid_descr d;
+	uint64_t kcr3, ucr3;
 	u_int cpuid, i;
 
 	if (pmap_type_guest(pmap)) {
@@ -1684,15 +1728,30 @@
 		cpuid = PCPU_GET(cpuid);
 		if (pmap == PCPU_GET(curpmap)) {
 			if (pmap_pcid_enabled) {
+				critical_enter();
 				if (invpcid_works) {
 					d.pcid = pmap->pm_pcids[cpuid].pm_pcid;
 					d.pad = 0;
 					d.addr = 0;
 					invpcid(&d, INVPCID_CTX);
+					if (pti) {
+						d.pcid |= PMAP_PCID_USER_PT;
+						invpcid(&d, INVPCID_CTX);
+					}
 				} else {
-					load_cr3(pmap->pm_cr3 | pmap->pm_pcids
-					    [PCPU_GET(cpuid)].pm_pcid);
+					kcr3 = pmap->pm_cr3 | pmap->pm_pcids[
+					    cpuid].pm_pcid;
+					if (pti) {
+						ucr3 = pmap->pm_ucr3 |
+						    pmap->pm_pcids[cpuid].
+						    pm_pcid | PMAP_PCID_USER_PT;
+						pmap_pti_pcid_invalidate(ucr3,
+						    kcr3);
+					} else
+						load_cr3(kcr3);
+
 				}
+				critical_exit();
 			} else {
 				invltlb();
 			}
@@ -1797,6 +1856,8 @@
 void
 pmap_invalidate_page(pmap_t pmap, vm_offset_t va)
 {
+	struct invpcid_descr d;
+	uint64_t kcr3, ucr3;
 
 	if (pmap->pm_type == PT_RVI || pmap->pm_type == PT_EPT) {
 		pmap->pm_eptgen++;
@@ -1805,16 +1866,36 @@
 	KASSERT(pmap->pm_type == PT_X86,
 	    ("pmap_invalidate_range: unknown type %d", pmap->pm_type));
 
-	if (pmap == kernel_pmap || pmap == PCPU_GET(curpmap))
+	if (pmap == kernel_pmap || pmap == PCPU_GET(curpmap)) {
 		invlpg(va);
-	else if (pmap_pcid_enabled)
+		if (pmap == PCPU_GET(curpmap) && pmap_pcid_enabled && pti) {
+			critical_enter();
+			if (invpcid_works) {
+				d.pcid = pmap->pm_pcids[0].pm_pcid |
+				    PMAP_PCID_USER_PT;
+				d.pad = 0;
+				d.addr = va;
+				invpcid(&d, INVPCID_ADDR);
+			} else {
+				kcr3 = pmap->pm_cr3 | pmap->pm_pcids[0].
+				    pm_pcid | CR3_PCID_SAVE;
+				ucr3 = pmap->pm_ucr3 | pmap->pm_pcids[0].
+				    pm_pcid | PMAP_PCID_USER_PT |
+				    CR3_PCID_SAVE;
+				pmap_pti_pcid_invlpg(ucr3, kcr3, va);
+			}
+			critical_exit();
+		}
+	} else if (pmap_pcid_enabled)
 		pmap->pm_pcids[0].pm_gen = 0;
 }
 
 void
 pmap_invalidate_range(pmap_t pmap, vm_offset_t sva, vm_offset_t eva)
 {
+	struct invpcid_descr d;
 	vm_offset_t addr;
+	uint64_t kcr3, ucr3;
 
 	if (pmap->pm_type == PT_RVI || pmap->pm_type == PT_EPT) {
 		pmap->pm_eptgen++;
@@ -1826,6 +1907,24 @@
 	if (pmap == kernel_pmap || pmap == PCPU_GET(curpmap)) {
 		for (addr = sva; addr < eva; addr += PAGE_SIZE)
 			invlpg(addr);
+		if (pmap == PCPU_GET(curpmap) && pmap_pcid_enabled && pti) {
+			critical_enter();
+			if (invpcid_works) {
+				d.pcid = pmap->pm_pcids[0].pm_pcid |
+				    PMAP_PCID_USER_PT;
+				d.pad = 0;
+				d.addr = sva;
+				for (; d.addr < eva; d.addr += PAGE_SIZE)
+					invpcid(&d, INVPCID_ADDR);
+			} else {
+				kcr3 = pmap->pm_cr3 | pmap->pm_pcids[0].
+				    pm_pcid | CR3_PCID_SAVE;
+				ucr3 = pmap->pm_ucr3 | pmap->pm_pcids[0].
+				    pm_pcid | PMAP_PCID_USER_PT | CR3_PCID_SAVE;
+				pmap_pti_pcid_invlrng(ucr3, kcr3, sva, eva);
+			}
+			critical_exit();
+		}
 	} else if (pmap_pcid_enabled) {
 		pmap->pm_pcids[0].pm_gen = 0;
 	}
@@ -1835,6 +1934,7 @@
 pmap_invalidate_all(pmap_t pmap)
 {
 	struct invpcid_descr d;
+	uint64_t kcr3, ucr3;
 
 	if (pmap->pm_type == PT_RVI || pmap->pm_type == PT_EPT) {
 		pmap->pm_eptgen++;
@@ -1852,15 +1952,26 @@
 		}
 	} else if (pmap == PCPU_GET(curpmap)) {
 		if (pmap_pcid_enabled) {
+			critical_enter();
 			if (invpcid_works) {
 				d.pcid = pmap->pm_pcids[0].pm_pcid;
 				d.pad = 0;
 				d.addr = 0;
 				invpcid(&d, INVPCID_CTX);
+				if (pti) {
+					d.pcid |= PMAP_PCID_USER_PT;
+					invpcid(&d, INVPCID_CTX);
+				}
 			} else {
-				load_cr3(pmap->pm_cr3 | pmap->pm_pcids[0].
-				    pm_pcid);
+				kcr3 = pmap->pm_cr3 | pmap->pm_pcids[0].pm_pcid;
+				if (pti) {
+					ucr3 = pmap->pm_ucr3 | pmap->pm_pcids[
+					    0].pm_pcid | PMAP_PCID_USER_PT;
+					pmap_pti_pcid_invalidate(ucr3, kcr3);
+				} else
+					load_cr3(kcr3);
 			}
+			critical_exit();
 		} else {
 			invltlb();
 		}
@@ -2398,7 +2509,8 @@
 	pmap->pm_pml4 = (pml4_entry_t *)PHYS_TO_DMAP(KPML4phys);
 	pmap->pm_pml4u = NULL;
 	pmap->pm_cr3 = KPML4phys;
-	pmap->pm_ucr3 = ~0UL;
+	/* hack to keep pmap_pti_pcid_invalidate() alive */
+	pmap->pm_ucr3 = PMAP_NO_CR3;
 	pmap->pm_root.rt_root = 0;
 	CPU_ZERO(&pmap->pm_active);
 	TAILQ_INIT(&pmap->pm_pvchunk);
@@ -2408,7 +2520,7 @@
 		pmap->pm_pcids[i].pm_pcid = PMAP_PCID_NONE;
 		pmap->pm_pcids[i].pm_gen = 0;
 		if (!pti)
-			__pcpu[i].pc_kcr3 = ~0ul;
+			__pcpu[i].pc_kcr3 = PMAP_NO_CR3;
 	}
 	PCPU_SET(curpmap, kernel_pmap);
 	pmap_activate(curthread);
@@ -7134,13 +7246,15 @@
 
 	CRITICAL_ASSERT(curthread);
 	gen = PCPU_GET(pcid_gen);
-	if (pmap->pm_pcids[cpuid].pm_pcid == PMAP_PCID_KERN ||
-	    pmap->pm_pcids[cpuid].pm_gen == gen)
+	if (!pti && (pmap->pm_pcids[cpuid].pm_pcid == PMAP_PCID_KERN ||
+	    pmap->pm_pcids[cpuid].pm_gen == gen))
 		return (CR3_PCID_SAVE);
 	pcid_next = PCPU_GET(pcid_next);
-	KASSERT(pcid_next <= PMAP_PCID_OVERMAX, ("cpu %d pcid_next %#x",
-	    cpuid, pcid_next));
-	if (pcid_next == PMAP_PCID_OVERMAX) {
+	KASSERT((!pti && pcid_next <= PMAP_PCID_OVERMAX) ||
+	    (pti && pcid_next <= PMAP_PCID_OVERMAX_KERN),
+	    ("cpu %d pcid_next %#x", cpuid, pcid_next));
+	if ((!pti && pcid_next == PMAP_PCID_OVERMAX) ||
+	    (pti && pcid_next == PMAP_PCID_OVERMAX_KERN)) {
 		new_gen = gen + 1;
 		if (new_gen == 0)
 			new_gen = 1;
@@ -7159,6 +7273,7 @@
 pmap_activate_sw(struct thread *td)
 {
 	pmap_t oldpmap, pmap;
+	struct invpcid_descr d;
 	uint64_t cached, cr3;
 	register_t rflags;
 	u_int cpuid;
@@ -7215,6 +7330,25 @@
 				PCPU_INC(pm_save_cnt);
 		}
 		PCPU_SET(curpmap, pmap);
+		if (pti) {
+			PCPU_SET(kcr3, pmap->pm_cr3 |
+			    pmap->pm_pcids[cpuid].pm_pcid | CR3_PCID_SAVE);
+			PCPU_SET(ucr3, pmap->pm_ucr3 | PMAP_PCID_USER_PT |
+			    pmap->pm_pcids[cpuid].pm_pcid | CR3_PCID_SAVE);
+			if (pmap ->pm_ucr3 != PMAP_NO_CR3) {
+				if (invpcid_works) {
+					d.pcid = PMAP_PCID_USER_PT |
+					    pmap->pm_pcids[cpuid].pm_pcid;
+					d.pad = 0;
+					d.addr = 0;
+					invpcid(&d, INVPCID_CTX);
+				} else {
+					pmap_pti_pcid_invalidate(
+					    PCPU_GET(ucr3) & ~CR3_PCID_SAVE,
+					    PCPU_GET(kcr3) & ~CR3_PCID_SAVE);
+				}
+			}
+		}
 		if (!invpcid_works)
 			intr_restore(rflags);
 	} else if (cr3 != pmap->pm_cr3) {
Index: sys/amd64/amd64/support.S
===================================================================
--- sys/amd64/amd64/support.S
+++ sys/amd64/amd64/support.S
@@ -802,3 +802,51 @@
 	movl	$EFAULT,%eax
 	POP_FRAME_POINTER
 	ret
+
+/*
+ * void pmap_pti_pcid_invalidate(uint64_t ucr3, uint64_t kcr3);
+ * Invalidates address space addressed by ucr3, then returns to kcr3.
+ * Done in assembler to ensure no other memory accesses happen while
+ * on ucr3.
+ */
+	ALIGN_TEXT
+ENTRY(pmap_pti_pcid_invalidate)
+	pushfq
+	cli
+	movq	%rdi,%cr3	/* to user page table */
+	movq	%rsi,%cr3	/* back to kernel */
+	popfq
+	retq
+
+/*
+ * void pmap_pti_pcid_invlpg(uint64_t ucr3, uint64_t kcr3, vm_offset_t va);
+ * Invalidates virtual address va in address space ucr3, then returns to kcr3.
+ */
+	ALIGN_TEXT
+ENTRY(pmap_pti_pcid_invlpg)
+	pushfq
+	cli
+	movq	%rdi,%cr3	/* to user page table */
+	invlpg	(%rdx)
+	movq	%rsi,%cr3	/* back to kernel */
+	popfq
+	retq
+
+/*
+ * void pmap_pti_pcid_invlrng(uint64_t ucr3, uint64_t kcr3, vm_offset_t sva,
+ *     vm_offset_t eva);
+ * Invalidates virtual addresses between sva and eva in address space ucr3,
+ * then returns to kcr3.
+ */
+	ALIGN_TEXT
+ENTRY(pmap_pti_pcid_invlrng)
+	pushfq
+	cli
+	movq	%rdi,%cr3	/* to user page table */
+1:	invlpg	(%rdx)
+	addq	$PAGE_SIZE,%rdx
+	cmpq	%rdx,%rcx
+	ja	1b
+	movq	%rsi,%cr3	/* back to kernel */
+	popfq
+	retq
Index: sys/amd64/include/pmap.h
===================================================================
--- sys/amd64/include/pmap.h
+++ sys/amd64/include/pmap.h
@@ -225,6 +225,10 @@
 #define	PMAP_PCID_NONE		0xffffffff
 #define	PMAP_PCID_KERN		0
 #define	PMAP_PCID_OVERMAX	0x1000
+#define	PMAP_PCID_OVERMAX_KERN	0x800
+#define	PMAP_PCID_USER_PT	0x800
+
+#define	PMAP_NO_CR3		(~0UL)
 
 #ifndef LOCORE
 
@@ -433,6 +437,10 @@
 void	pmap_unmap_io_transient(vm_page_t *, vm_offset_t *, int, boolean_t);
 void	pmap_pti_add_kva(vm_offset_t sva, vm_offset_t eva, bool exec);
 void	pmap_pti_remove_kva(vm_offset_t sva, vm_offset_t eva);
+void	pmap_pti_pcid_invalidate(uint64_t ucr3, uint64_t kcr3);
+void	pmap_pti_pcid_invlpg(uint64_t ucr3, uint64_t kcr3, vm_offset_t va);
+void	pmap_pti_pcid_invlrng(uint64_t ucr3, uint64_t kcr3, vm_offset_t sva,
+	    vm_offset_t eva);
 #endif /* _KERNEL */
 
 /* Return various clipped indexes for a given VA */
Index: sys/amd64/include/smp.h
===================================================================
--- sys/amd64/include/smp.h
+++ sys/amd64/include/smp.h
@@ -36,7 +36,11 @@
 	IDTVEC(justreturn1_pti),
 	IDTVEC(invltlb_pti),
 	IDTVEC(invlpg_pti),
+	IDTVEC(invlpg_invpcid_pti_pti),
+	IDTVEC(invlpg_pcid_pti_pti),
 	IDTVEC(invlrng_pti),
+	IDTVEC(invlrng_invpcid_pti_pti),
+	IDTVEC(invlrng_pcid_pti_pti),
 	IDTVEC(invlcache_pti),
 	IDTVEC(ipi_intr_bitmap_handler_pti),
 	IDTVEC(cpustop_pti),
@@ -45,6 +49,11 @@
 
 void	invltlb_pcid_handler(void);
 void	invltlb_invpcid_handler(void);
+void	invltlb_invpcid_pti_handler(void);
+void	invlpg_invpcid_pti_handler(void);
+void	invlpg_pcid_pti_handler(void);
+void	invlrng_invpcid_pti_handler(void);
+void	invlrng_pcid_pti_handler(void);
 int	native_start_all_aps(void);
 
 #endif /* !LOCORE */
Index: sys/i386/i386/pmap.c
===================================================================
--- sys/i386/i386/pmap.c
+++ sys/i386/i386/pmap.c
@@ -1045,7 +1045,7 @@
 		CPU_AND(&other_cpus, &pmap->pm_active);
 		mask = &other_cpus;
 	}
-	smp_masked_invlpg(*mask, va);
+	smp_masked_invlpg(*mask, va, pmap);
 	sched_unpin();
 }
 
@@ -1079,7 +1079,7 @@
 		CPU_AND(&other_cpus, &pmap->pm_active);
 		mask = &other_cpus;
 	}
-	smp_masked_invlpg_range(*mask, sva, eva);
+	smp_masked_invlpg_range(*mask, sva, eva, pmap);
 	sched_unpin();
 }
 
Index: sys/i386/i386/vm_machdep.c
===================================================================
--- sys/i386/i386/vm_machdep.c
+++ sys/i386/i386/vm_machdep.c
@@ -768,7 +768,7 @@
 		CPU_NAND(&other_cpus, &sf->cpumask);
 		if (!CPU_EMPTY(&other_cpus)) {
 			CPU_OR(&sf->cpumask, &other_cpus);
-			smp_masked_invlpg(other_cpus, sf->kva);
+			smp_masked_invlpg(other_cpus, sf->kva, kernel_pmap);
 		}
 	}
 	sched_unpin();
Index: sys/x86/include/x86_smp.h
===================================================================
--- sys/x86/include/x86_smp.h
+++ sys/x86/include/x86_smp.h
@@ -39,6 +39,7 @@
 extern int cpu_cores;
 extern volatile uint32_t smp_tlb_generation;
 extern struct pmap *smp_tlb_pmap;
+extern vm_offset_t smp_tlb_addr1, smp_tlb_addr2;
 extern u_int xhits_gbl[];
 extern u_int xhits_pg[];
 extern u_int xhits_rng[];
@@ -97,9 +98,9 @@
 u_int	mp_bootaddress(u_int);
 void	set_interrupt_apic_ids(void);
 void	smp_cache_flush(void);
-void	smp_masked_invlpg(cpuset_t mask, vm_offset_t addr);
+void	smp_masked_invlpg(cpuset_t mask, vm_offset_t addr, struct pmap *pmap);
 void	smp_masked_invlpg_range(cpuset_t mask, vm_offset_t startva,
-	    vm_offset_t endva);
+	    vm_offset_t endva, struct pmap *pmap);
 void	smp_masked_invltlb(cpuset_t mask, struct pmap *pmap);
 void	mem_range_AP_init(void);
 void	topo_probe(void);
Index: sys/x86/x86/mp_x86.c
===================================================================
--- sys/x86/x86/mp_x86.c
+++ sys/x86/x86/mp_x86.c
@@ -1506,7 +1506,7 @@
  */
 
 /* Variables needed for SMP tlb shootdown. */
-static vm_offset_t smp_tlb_addr1, smp_tlb_addr2;
+vm_offset_t smp_tlb_addr1, smp_tlb_addr2;
 pmap_t smp_tlb_pmap;
 volatile uint32_t smp_tlb_generation;
 
@@ -1583,11 +1583,11 @@
 }
 
 void
-smp_masked_invlpg(cpuset_t mask, vm_offset_t addr)
+smp_masked_invlpg(cpuset_t mask, vm_offset_t addr, pmap_t pmap)
 {
 
 	if (smp_started) {
-		smp_targeted_tlb_shootdown(mask, IPI_INVLPG, NULL, addr, 0);
+		smp_targeted_tlb_shootdown(mask, IPI_INVLPG, pmap, addr, 0);
 #ifdef COUNT_XINVLTLB_HITS
 		ipi_page++;
 #endif
@@ -1595,11 +1595,12 @@
 }
 
 void
-smp_masked_invlpg_range(cpuset_t mask, vm_offset_t addr1, vm_offset_t addr2)
+smp_masked_invlpg_range(cpuset_t mask, vm_offset_t addr1, vm_offset_t addr2,
+    pmap_t pmap)
 {
 
 	if (smp_started) {
-		smp_targeted_tlb_shootdown(mask, IPI_INVLRNG, NULL,
+		smp_targeted_tlb_shootdown(mask, IPI_INVLRNG, pmap,
 		    addr1, addr2);
 #ifdef COUNT_XINVLTLB_HITS
 		ipi_range++;