powerpc: Add the DAWR support to the set_break()
This adds DAWR supoprt to the set_break().
It does both bare metal and PAPR versions of setting the DAWR.
There is still some work we can do to make full use of the watchpoint but that
will come later.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c
index 1890730..b1f60d1 100644
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c
@@ -65,6 +65,7 @@
#include <asm/smp.h>
#include <asm/firmware.h>
#include <asm/eeh.h>
+#include <asm/reg.h>
#include "plpar_wrappers.h"
#include "pseries.h"
@@ -500,6 +501,14 @@
return plpar_hcall_norets(H_SET_XDABR, dabr, dabrx);
}
+static int pseries_set_dawr(unsigned long dawr, unsigned long dawrx)
+{
+ /* PAPR says we can't set HYP */
+ dawrx &= ~DAWRX_HYP;
+
+ return plapr_set_watchpoint0(dawr, dawrx);
+}
+
#define CMO_CHARACTERISTICS_TOKEN 44
#define CMO_MAXLENGTH 1026
@@ -606,6 +615,9 @@
else if (firmware_has_feature(FW_FEATURE_DABR))
ppc_md.set_dabr = pseries_set_dabr;
+ if (firmware_has_feature(FW_FEATURE_SET_MODE))
+ ppc_md.set_dawr = pseries_set_dawr;
+
pSeries_cmo_feature_init();
iommu_init_early_pSeries();