svn commit: r347427 - head/sys/riscv/riscv

[Ruslan Bukin]

Author: br
Date: Fri May 10 11:21:57 2019
New Revision: 347427
URL: https://svnweb.freebsd.org/changeset/base/347427

Log:
  RISC-V ISA does not specify how to manage physical memory attributes (PMA).
  So do nothing in pmap_page_set_memattr() and don't panic.
  
  Reviewed by:	markj
  Sponsored by:	DARPA, AFRL
  Differential Revision:	https://reviews.freebsd.org/D20209

Modified:
  head/sys/riscv/riscv/pmap.c

Modified: head/sys/riscv/riscv/pmap.c
==============================================================================
--- head/sys/riscv/riscv/pmap.c	Fri May 10 08:16:29 2019	(r347426)
+++ head/sys/riscv/riscv/pmap.c	Fri May 10 11:21:57 2019	(r347427)
@@ -4200,16 +4200,6 @@ pmap_page_set_memattr(vm_page_t m, vm_memattr_t ma)
 {
 
 	m->md.pv_memattr = ma;
-
-	/*
-	 * RISCVTODO: Implement the below (from the amd64 pmap)
-	 * If "m" is a normal page, update its direct mapping.  This update
-	 * can be relied upon to perform any cache operations that are
-	 * required for data coherence.
-	 */
-	if ((m->flags & PG_FICTITIOUS) == 0 &&
-	    PHYS_IN_DMAP(VM_PAGE_TO_PHYS(m)))
-		panic("RISCVTODO: pmap_page_set_memattr");
 }
 
 /*