[PATCH] powerpc: Fix cell blade detection
The IBM Cell blade firmware might confuse the kernel to think it's a
pSeries machine. This fixes it for now. With a bit of luck, the firmware
will be updated to avoid that in the future but currently that patch is
needed.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index f393a38..f70bd09 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -1623,6 +1623,15 @@
if (strstr(p, RELOC("Power Macintosh")) ||
strstr(p, RELOC("MacRISC")))
return PLATFORM_POWERMAC;
+#ifdef CONFIG_PPC64
+ /* We must make sure we don't detect the IBM Cell
+ * blades as pSeries due to some firmware issues,
+ * so we do it here.
+ */
+ if (strstr(p, RELOC("IBM,CBEA")) ||
+ strstr(p, RELOC("IBM,CPBW-1.0")))
+ return PLATFORM_GENERIC;
+#endif /* CONFIG_PPC64 */
i += sl + 1;
}
}
diff --git a/arch/powerpc/platforms/cell/setup.c b/arch/powerpc/platforms/cell/setup.c
index 6574b22..fd3e560 100644
--- a/arch/powerpc/platforms/cell/setup.c
+++ b/arch/powerpc/platforms/cell/setup.c
@@ -125,14 +125,13 @@
static int __init cell_probe(void)
{
- /* XXX This is temporary, the Cell maintainer will come up with
- * more appropriate detection logic
- */
unsigned long root = of_get_flat_dt_root();
- if (!of_flat_dt_is_compatible(root, "IBM,CPBW-1.0"))
- return 0;
- return 1;
+ if (of_flat_dt_is_compatible(root, "IBM,CBEA") ||
+ of_flat_dt_is_compatible(root, "IBM,CPBW-1.0"))
+ return 1;
+
+ return 0;
}
/*
diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c
index 5f79f01..3ba8783 100644
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c
@@ -389,6 +389,7 @@
static int __init pSeries_probe(void)
{
+ unsigned long root = of_get_flat_dt_root();
char *dtype = of_get_flat_dt_prop(of_get_flat_dt_root(),
"device_type", NULL);
if (dtype == NULL)
@@ -396,6 +397,13 @@
if (strcmp(dtype, "chrp"))
return 0;
+ /* Cell blades firmware claims to be chrp while it's not. Until this
+ * is fixed, we need to avoid those here.
+ */
+ if (of_flat_dt_is_compatible(root, "IBM,CPBW-1.0") ||
+ of_flat_dt_is_compatible(root, "IBM,CBEA"))
+ return 0;
+
DBG("pSeries detected, looking for LPAR capability...\n");
/* Now try to figure out if we are running on LPAR */