Switch vmapbuf() and vunmapbuf() over to km_alloc(9) and km_free(9) like

we did for arm64 and powerpc64 some time ago.

ok guenther@

diff --git a/sys/arch/amd64/amd64/vm_machdep.c b/sys/arch/amd64/amd64/vm_machdep.c
index 39bf02b..e8c7ac5 100644 (file)
--- a/sys/arch/amd64/amd64/vm_machdep.c
+++ b/sys/arch/amd64/amd64/vm_machdep.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: vm_machdep.c,v 1.44 2021/05/16 06:20:28 jsg Exp $     */
+/*     $OpenBSD: vm_machdep.c,v 1.45 2022/02/05 09:37:06 kettenis Exp $        */
 /*     $NetBSD: vm_machdep.c,v 1.1 2003/04/26 18:39:33 fvdl Exp $      */
 
 /*-
@@ -140,10 +140,15 @@ setguardpage(struct proc *p)
        pmap_update(pmap_kernel());
 }
 
+struct kmem_va_mode kv_physwait = {
+       .kv_map = &phys_map,
+       .kv_wait = 1,
+};
+
 /*
  * Map a user I/O request into kernel virtual address space.
  * Note: the pages are already locked by uvm_vslock(), so we
- * do not need to pass an access_type to pmap_enter().   
+ * do not need to pass an access_type to pmap_enter().
  */
 void
 vmapbuf(struct buf *bp, vsize_t len)
@@ -156,13 +161,13 @@ vmapbuf(struct buf *bp, vsize_t len)
        faddr = trunc_page((vaddr_t)(bp->b_saveaddr = bp->b_data));
        off = (vaddr_t)bp->b_data - faddr;
        len = round_page(off + len);
-       taddr= uvm_km_valloc_wait(phys_map, len);
+       taddr = (vaddr_t)km_alloc(len, &kv_physwait, &kp_none, &kd_waitok);
        bp->b_data = (caddr_t)(taddr + off);
        /*
         * The region is locked, so we expect that pmap_pte() will return
         * non-NULL.
         * XXX: unwise to expect this in a multithreaded environment.
-        * anything can happen to a pmap between the time we lock a 
+        * anything can happen to a pmap between the time we lock a
         * region, release the pmap lock, and then relock it for
         * the pmap_extract().
         *
@@ -178,6 +183,7 @@ vmapbuf(struct buf *bp, vsize_t len)
                taddr += PAGE_SIZE;
                len -= PAGE_SIZE;
        }
+       pmap_update(pmap_kernel());
 }
 
 /*
@@ -195,7 +201,7 @@ vunmapbuf(struct buf *bp, vsize_t len)
        len = round_page(off + len);
        pmap_kremove(addr, len);
        pmap_update(pmap_kernel());
-       uvm_km_free_wakeup(phys_map, addr, len);
+       km_free((void *)addr, len, &kv_physwait, &kp_none);
        bp->b_data = bp->b_saveaddr;
        bp->b_saveaddr = NULL;
 }