On 04.09.2014 18:34, Benjamin Herrenschmidt wrote:
On Thu, 2014-09-04 at 16:52 +0900, Michel Dänzer wrote:
#endif
+#if defined(__powerpc__) && !defined(CONFIG_NOT_COHERENT_CACHE)
+ /*
+ * Using a non-cachable mapping of system memory on
+ * cache coherent powerpc's can be fatal, let's make
+ * sure this doesn't happen and warn if it does. The
+ * only exception is powermac with AGP which has to
+ * take the risk.
+ */
+ if (!machine_is(powermac) &&
+ ((caching_flags & TTM_PL_FLAG_SYSTEM) ||
+ (caching_flags & TTM_PL_FLAG_TT))) {
+ pr_err_once("TTM: Attempt to use a non-cached"
+ " mapping on RAM unsupported !\n");
+ return tmp;
NAK, this breaks AGP on PowerMacs.
No it doesn't :-)
Yeah sorry, I was blind.
--
Earthling Michel Dänzer | http://www.amd.com
Libre software enthusiast | Mesa and X developer
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