Re: amd64: pmap_kremove() hang

[Miod Vallat]

Could this diff help?

Index: pmap.c
===================================================================
RCS file: /OpenBSD/src/sys/arch/amd64/amd64/pmap.c,v
diff -u -p -r1.182 pmap.c
--- pmap.c      15 Aug 2025 13:40:43 -0000      1.182
+++ pmap.c      23 Dec 2025 20:04:38 -0000
@@ -3301,16 +3301,22 @@ pmap_tlb_shootrange(struct pmap *pm, vad
        }
 
        if (!pmap_use_pcid) {
+               if (is_kva)
+                       KASSERT(eva >= VM_MIN_KERNEL_ADDRESS);
+               else
+                       KASSERT(eva < VM_MIN_KERNEL_ADDRESS);
                if (shootself) {
                        for (va = sva; va < eva; va += PAGE_SIZE)
                                pmap_update_pg(va);
                }
        } else if (is_kva) {
+               KASSERT(eva >= VM_MIN_KERNEL_ADDRESS);
                for (va = sva; va < eva; va += PAGE_SIZE) {
                        invpcid(INVPCID_ADDR, PCID_PROC, va);
                        invpcid(INVPCID_ADDR, PCID_KERN, va);
                }
        } else if (shootself) {
+               KASSERT(eva < VM_MIN_KERNEL_ADDRESS);
                if (cpu_meltdown) {
                        for (va = sva; va < eva; va += PAGE_SIZE) {
                                invpcid(INVPCID_ADDR, PCID_PROC, va);