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powerpc/powernv: Define and set POWER9 HFSCR doorbell bit

Define and set the POWER9 HFSCR doorbell bit so that guests can use
msgsndp.

ISA 3.0 calls this MSGP, so name it accordingly in the code.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Michael Neuling 8 years ago
parent
1f0f2e7227
commit
02ed21aeda
2 changed files with 3 additions and 1 deletions
Unified View Show Diff Stats
  1. 2 0
      arch/powerpc/include/asm/reg.h
  2. 1 1
      arch/powerpc/kernel/cpu_setup_power.S

+ 2 - 0
arch/powerpc/include/asm/reg.h
View File 

@@ -309,6 +309,7 @@
 
 
 
 /* HFSCR and FSCR bit numbers are the same */
 
 /* HFSCR and FSCR bit numbers are the same */
 
 #define FSCR_LM_LG	11	/* Enable Load Monitor Registers */
 
 #define FSCR_LM_LG	11	/* Enable Load Monitor Registers */
 
+#define FSCR_MSGP_LG	10	/* Enable MSGP */
 
 #define FSCR_TAR_LG	8	/* Enable Target Address Register */
 
 #define FSCR_TAR_LG	8	/* Enable Target Address Register */
 
 #define FSCR_EBB_LG	7	/* Enable Event Based Branching */
 
 #define FSCR_EBB_LG	7	/* Enable Event Based Branching */
 
 #define FSCR_TM_LG	5	/* Enable Transactional Memory */
 
 #define FSCR_TM_LG	5	/* Enable Transactional Memory */
 
@@ -324,6 +325,7 @@
 
 #define   FSCR_DSCR	__MASK(FSCR_DSCR_LG)
 
 #define   FSCR_DSCR	__MASK(FSCR_DSCR_LG)
 
 #define SPRN_HFSCR	0xbe	/* HV=1 Facility Status & Control Register */
 
 #define SPRN_HFSCR	0xbe	/* HV=1 Facility Status & Control Register */
 
 #define   HFSCR_LM	__MASK(FSCR_LM_LG)
 
 #define   HFSCR_LM	__MASK(FSCR_LM_LG)
 
+#define   HFSCR_MSGP	__MASK(FSCR_MSGP_LG)
 
 #define   HFSCR_TAR	__MASK(FSCR_TAR_LG)
 
 #define   HFSCR_TAR	__MASK(FSCR_TAR_LG)
 
 #define   HFSCR_EBB	__MASK(FSCR_EBB_LG)
 
 #define   HFSCR_EBB	__MASK(FSCR_EBB_LG)
 
 #define   HFSCR_TM	__MASK(FSCR_TM_LG)
 
 #define   HFSCR_TM	__MASK(FSCR_TM_LG)

+ 1 - 1
arch/powerpc/kernel/cpu_setup_power.S
View File 

@@ -174,7 +174,7 @@ __init_FSCR:
 
 __init_HFSCR:
 
 __init_HFSCR:
 
 	mfspr	r3,SPRN_HFSCR
 
 	mfspr	r3,SPRN_HFSCR
 
 	ori	r3,r3,HFSCR_TAR|HFSCR_TM|HFSCR_BHRB|HFSCR_PM|\
 
 	ori	r3,r3,HFSCR_TAR|HFSCR_TM|HFSCR_BHRB|HFSCR_PM|\
 
-		      HFSCR_DSCR|HFSCR_VECVSX|HFSCR_FP|HFSCR_EBB
 
+		      HFSCR_DSCR|HFSCR_VECVSX|HFSCR_FP|HFSCR_EBB|HFSCR_MSGP
 
 	mtspr	SPRN_HFSCR,r3
 
 	mtspr	SPRN_HFSCR,r3
 
 	blr
 
 	blr