[PATCH] powerpc/powernv: Define and set POWER9 HFSCR doorbell bit
From: Michael Neuling <hidden>
Date: 2016-11-22 23:44:20
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
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 <redacted> --- arch/powerpc/include/asm/reg.h | 2 ++ arch/powerpc/kernel/cpu_setup_power.S | 2 +- 2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h
index f67afe451f..5f59cce600 100644
--- a/arch/powerpc/include/asm/reg.h
+++ b/arch/powerpc/include/asm/reg.h@@ -308,6 +308,7 @@ #define SPRN_PMCR 0x374 /* Power Management Control Register */ /* HFSCR and FSCR bit numbers are the same */ +#define FSCR_MSGP_LG 10 /* Enable MSGP */ #define FSCR_TAR_LG 8 /* Enable Target Address Register */ #define FSCR_EBB_LG 7 /* Enable Event Based Branching */ #define FSCR_TM_LG 5 /* Enable Transactional Memory */
@@ -321,6 +322,7 @@ #define FSCR_EBB __MASK(FSCR_EBB_LG) #define FSCR_DSCR __MASK(FSCR_DSCR_LG) #define SPRN_HFSCR 0xbe /* HV=1 Facility Status & Control Register */ +#define HFSCR_MSGP __MASK(FSCR_MSGP_LG) #define HFSCR_TAR __MASK(FSCR_TAR_LG) #define HFSCR_EBB __MASK(FSCR_EBB_LG) #define HFSCR_TM __MASK(FSCR_TM_LG)
diff --git a/arch/powerpc/kernel/cpu_setup_power.S b/arch/powerpc/kernel/cpu_setup_power.S
index 37c027ca83..f3e1f5d29d 100644
--- a/arch/powerpc/kernel/cpu_setup_power.S
+++ b/arch/powerpc/kernel/cpu_setup_power.S@@ -174,7 +174,7 @@ __init_FSCR: __init_HFSCR: mfspr r3,SPRN_HFSCR 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 blr
--
2.9.3