powerpc: Add the DAWR support to the set_break()

[firefly-linux-kernel-4.4.55.git] / arch / powerpc / platforms / pseries / setup.c

diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c
index 1890730354bb23070452d3b9a111719e7cab5792..b1f60d162bb617618d56654855b63598380d7f8c 100644 (file)
--- 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 @@ static int pseries_set_xdabr(unsigned long dabr, unsigned long dabrx)
        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 @@ static void __init pSeries_init_early(void)
        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();