powerpc: Make set_dabr() a ppc_md function

Move pSeries specific code in set_dabr() into a ppc_md function, this will
allow us to keep plpar_wrappers.h private to platforms/pseries.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>

1 files changed, 12 insertions, 0 deletions

diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c
index c0a3d918148..ee468f07f37 100644
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c
@@ -350,6 +350,16 @@ static void pSeries_mach_cpu_die(void)
 	for(;;);
 }
 
+static int pseries_set_dabr(unsigned long dabr)
+{
+	if (firmware_has_feature(FW_FEATURE_XDABR)) {
+		/* We want to catch accesses from kernel and userspace */
+		return plpar_set_xdabr(dabr, H_DABRX_KERNEL | H_DABRX_USER);
+	}
+
+	return plpar_set_dabr(dabr);
+}
+
 
 /*
  * Early initialization.  Relocation is on but do not reference unbolted pages
@@ -385,6 +395,8 @@ static void __init pSeries_init_early(void)
 		DBG("Hello World !\n");
 	}
 
+	if (firmware_has_feature(FW_FEATURE_XDABR | FW_FEATURE_DABR))
+		ppc_md.set_dabr = pseries_set_dabr;
 
 	iommu_init_early_pSeries();