diff mbox series

[3/7] powerpc/watchpoint: Set CPU_FTR_DAWR1 based on pa-features bit

Message ID 20200602040106.127693-4-ravi.bangoria@linux.ibm.com (mailing list archive)
State Superseded
Headers show
Series powerpc/watchpoint: Enable 2nd DAWR on baremetal and powervm | expand

Checks

Context Check Description
snowpatch_ozlabs/apply_patch warning Failed to apply on branch powerpc/merge (00ec79b0b767994422c43792d73ff1327714a73f)
snowpatch_ozlabs/apply_patch warning Failed to apply on branch powerpc/next (30df74d67d48949da87e3a5b57c381763e8fd526)
snowpatch_ozlabs/apply_patch warning Failed to apply on branch linus/master (f359287765c04711ff54fbd11645271d8e5ff763)
snowpatch_ozlabs/apply_patch warning Failed to apply on branch powerpc/fixes (2f26ed1764b42a8c40d9c48441c73a70d805decf)
snowpatch_ozlabs/apply_patch warning Failed to apply on branch linux-next (e7b08814b16b80a0bf76eeca16317f8c2ed23b8c)
snowpatch_ozlabs/apply_patch fail Failed to apply to any branch

Commit Message

Ravi Bangoria June 2, 2020, 4:01 a.m. UTC 
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 1dcf0e214a22..6de59de579f7 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,