[PATCH] Add hypervisor busy return codes

From: Dave Boutcher <boutcher@us.ibm.com>

Add hypervisor busy return codes

diff --git a/include/asm-ppc64/hvcall.h b/include/asm-ppc64/hvcall.h
index 482ca2220b31a4b8435030e686a57bf84ac93792..f47cc032919c84335eb77d7d333b7002f78d33bc 100644 (file)
--- a/include/asm-ppc64/hvcall.h
+++ b/include/asm-ppc64/hvcall.h
@@ -4,6 +4,14 @@
 #define H_Success      0
 #define H_Busy         1       /* Hardware busy -- retry later */
 #define H_Constrained  4       /* Resource request constrained to max allowed */
+#define H_LongBusyStartRange   9900  /* Start of long busy range */
+#define H_LongBusyOrder1msec   9900  /* Long busy, hint that 1msec is a good time to retry */
+#define H_LongBusyOrder10msec  9901  /* Long busy, hint that 10msec is a good time to retry */
+#define H_LongBusyOrder100msec 9902  /* Long busy, hint that 100msec is a good time to retry */
+#define H_LongBusyOrder1sec    9903  /* Long busy, hint that 1sec is a good time to retry */
+#define H_LongBusyOrder10sec   9904  /* Long busy, hint that 10sec is a good time to retry */
+#define H_LongBusyOrder100sec  9905  /* Long busy, hint that 100sec is a good time to retry */
+#define H_LongBusyEndRange     9905  /* End of long busy range */
 #define H_Hardware     -1      /* Hardware error */
 #define H_Function     -2      /* Function not supported */
 #define H_Privilege    -3      /* Caller not privileged */
@@ -21,6 +29,16 @@
 #define H_RemoteParm           -15
 #define H_Resource             -16
 
+/* Long Busy is a condition that can be returned by the firmware
+ * when a call cannot be completed now, but the identical call
+ * should be retried later.  This prevents calls blocking in the
+ * firmware for long periods of time. Annoyingly the firmware can return
+ * a range of return codes, hinting at how long we should wait before
+ * retrying.  If you don't care for the hint, the macro below is a good
+ * way to check for the long_busy return codes
+ */
+#define H_isLongBusy(x)  ((x >= H_LongBusyStartRange) && (x <= H_LongBusyEndRange))
+
 /* Flags */
 #define H_LARGE_PAGE           (1UL<<(63-16))
 #define H_EXACT                    (1UL<<(63-24))      /* Use exact PTE or return H_PTEG_FULL */
@@ -76,7 +94,7 @@
 #define H_PROD                 0xE8
 #define H_GET_PPP              0xEC
 #define H_SET_PPP              0xF0
-#define H_SET_PURR             0xF4
+#define H_PURR                 0xF4
 #define H_PIC                  0xF8
 #define H_REG_CRQ              0xFC
 #define H_FREE_CRQ             0x100
@@ -84,6 +102,9 @@
 #define H_SEND_CRQ             0x108
 #define H_COPY_RDMA             0x110
 #define H_POLL_PENDING         0x1D8
+#define H_VTERM_PARTNER_INFO   0x150
+#define H_REGISTER_VTERM               0x154
+#define H_FREE_VTERM                   0x158
 
 /* plpar_hcall() -- Generic call interface using above opcodes
  *