[XenPPC] [xenppc-unstable] [XEN][POWERPC] U4 DART workaround for functionality

[Xen patchbot-xenppc-unstable <patchbot-xenppc-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Jimi Xenidis <jimix@xxxxxxxxxxxxxx>
# Node ID 2aa9a65408bc10594cd2488f6640574f5ea67549
# Parent  2e303eacce32e5fd3f7b16c92ff034b7117e1d5f
[XEN][POWERPC] U4 DART workaround for functionality

This patch invalidates the whole DART cache rather than the single
entry.  Until we get single entry invalidating we'll have an obvious
performance issue.

Signed-off-by: Jimi Xenidis <jimix@xxxxxxxxxxxxxx>
---
 xen/arch/powerpc/dart_u4.c |    7 +++++++
 1 files changed, 7 insertions(+)

diff -r 2e303eacce32 -r 2aa9a65408bc xen/arch/powerpc/dart_u4.c
--- a/xen/arch/powerpc/dart_u4.c        Tue Sep 26 12:44:20 2006 -0400
+++ b/xen/arch/powerpc/dart_u4.c        Tue Sep 26 14:01:11 2006 -0400
@@ -19,6 +19,7 @@
  */
 
 #undef DEBUG
+#define INVALIDATE_ALL
 
 #include <xen/config.h>
 #include <xen/types.h>
@@ -123,8 +124,13 @@ static void u4_inv_all(void)
 
 static void u4_inv_entry(ulong pgn)
 {
+#ifdef INVALIDATE_ALL
+    return u4_inv_all();
+#else
     union dart_ctl dc;
     ulong retries = 0;
+
+    return u4_inv_all();
 
     dc.dc_word = in_32(&dart->d_dartcntl.dc_word);
     dc.dc_bits.dc_ilpn = pgn;
@@ -139,6 +145,7 @@ static void u4_inv_entry(ulong pgn)
         if (retries > 1000000)
             panic("WAY! too long\n");
     } while (dc.dc_bits.dc_ione != 0);
+#endif
 }
 
 static struct dart_ops u4_ops = {

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