powerpc: Turn on the EBB H/FSCR bits

This turns Event Based Branching (EBB) on in the Hypervisor Facility Status and
Control Register (HFSCR) and Facility Status and Control Register (FSCR).

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h
index 178a858..93be5fb 100644 (file)
--- a/arch/powerpc/include/asm/reg.h
+++ b/arch/powerpc/include/asm/reg.h
@@ -267,9 +267,11 @@
 #define SPRN_HSRR1     0x13B   /* Hypervisor Save/Restore 1 */
 #define SPRN_FSCR      0x099   /* Facility Status & Control Register */
 #define   FSCR_TAR     (1 << (63-55)) /* Enable Target Address Register */
+#define   FSCR_EBB     (1 << (63-56)) /* Enable Event Based Branching */
 #define   FSCR_DSCR    (1 << (63-61)) /* Enable Data Stream Control Register */
 #define SPRN_HFSCR     0xbe    /* HV=1 Facility Status & Control Register */
 #define   HFSCR_TAR    (1 << (63-55)) /* Enable Target Address Register */
+#define   HFSCR_EBB    (1 << (63-56)) /* Enable Event Based Branching */
 #define   HFSCR_TM     (1 << (63-58)) /* Enable Transactional Memory */
 #define   HFSCR_PM     (1 << (63-60)) /* Enable prob/priv access to PMU SPRs */
 #define   HFSCR_BHRB   (1 << (63-59)) /* Enable Branch History Rolling Buffer*/

diff --git a/arch/powerpc/kernel/cpu_setup_power.S b/arch/powerpc/kernel/cpu_setup_power.S
index 7b4db96..a283b64 100644 (file)
--- a/arch/powerpc/kernel/cpu_setup_power.S
+++ b/arch/powerpc/kernel/cpu_setup_power.S
@@ -123,14 +123,14 @@ __init_LPCR:
 
 __init_FSCR:
        mfspr   r3,SPRN_FSCR
-       ori     r3,r3,FSCR_TAR|FSCR_DSCR
+       ori     r3,r3,FSCR_TAR|FSCR_DSCR|FSCR_EBB
        mtspr   SPRN_FSCR,r3
        blr
 
 __init_HFSCR:
        mfspr   r3,SPRN_HFSCR
        ori     r3,r3,HFSCR_TAR|HFSCR_TM|HFSCR_BHRB|HFSCR_PM|\
-                               HFSCR_DSCR|HFSCR_VECVSX|HFSCR_FP
+                     HFSCR_DSCR|HFSCR_VECVSX|HFSCR_FP|HFSCR_EBB
        mtspr   SPRN_HFSCR,r3
        blr