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yaml --- r: 298399 b: refs/heads/master c: 3b588c7 h: refs/heads/master i: 298397: 0997058 298395: 954993b 298391: 19b1716 298383: 9392da1 298367: 82e8cc8 v: v3
git-mirror · Mar 29, 2012 · f714ff3 · f714ff3
1 parent 471e11b
commit f714ff3
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Showing 2 changed files with 7 additions and 2 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 2a78aeb1078994f6dab0173c2ecf5d9803ef0e8e
+refs/heads/master: 3b588c7efc84f15548afdda6a0d2f892fe83babc
diff --git a/trunk/arch/powerpc/include/asm/epapr_hcalls.h b/trunk/arch/powerpc/include/asm/epapr_hcalls.h
@@ -134,10 +134,15 @@
  * whether they will be clobbered.
  *
  * Note that r11 can be used as an output parameter.
+ *
+ * The "memory" clobber is only necessary for hcalls where the Hypervisor
+ * will read or write guest memory. However, we add it to all hcalls because
+ * the impact is minimal, and we want to ensure that it's present for the
+ * hcalls that need it.
 */
 
 /* List of common clobbered registers.  Do not use this macro. */
-#define EV_HCALL_CLOBBERS "r0", "r12", "xer", "ctr", "lr", "cc"
+#define EV_HCALL_CLOBBERS "r0", "r12", "xer", "ctr", "lr", "cc", "memory"
 
 #define EV_HCALL_CLOBBERS8 EV_HCALL_CLOBBERS
 #define EV_HCALL_CLOBBERS7 EV_HCALL_CLOBBERS8, "r10"