diff mbox series

[v3,5/9] powerpc/watchpoint: Set CPU_FTR_DAWR1 based on pa-features bit

Message ID 20200708045046.135702-6-ravi.bangoria@linux.ibm.com (mailing list archive)
State Superseded
Headers show
Series powerpc/watchpoint: Enable 2nd DAWR on baremetal and powervm | expand

Commit Message

Ravi Bangoria July 8, 2020, 4:50 a.m. UTC 
As per the PAPR, bit 0 of byte 64 in pa-features property indicates
availability of 2nd DAWR registers. i.e. If this bit is set, 2nd
DAWR is present, otherwise not. Host generally uses "cpu-features",
which masks "pa-features". But "cpu-features" are still not used for
guests and thus this change is mostly applicable for guests only.

Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
---
 arch/powerpc/kernel/prom.c | 2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index 9cc49f265c86..c76c09b97bc8 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -175,6 +175,8 @@  static struct ibm_pa_feature {
 	 */
 	{ .pabyte = 22, .pabit = 0, .cpu_features = CPU_FTR_TM_COMP,
 	  .cpu_user_ftrs2 = PPC_FEATURE2_HTM_COMP | PPC_FEATURE2_HTM_NOSC_COMP },
+
+	{ .pabyte = 64, .pabit = 0, .cpu_features = CPU_FTR_DAWR1 },
 };
 
 static void __init scan_features(unsigned long node, const unsigned char *ftrs,