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authorMichael Ellerman <michael@ellerman.id.au>2013-06-28 18:15:18 +1000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2013-07-01 11:50:17 +1000
commit6e0b8bc965d25a8e0701eaca3fca5941b4f4b2b2 (patch)
treeb4daf46d3650fdc5a479d6fe5bc8486842551fc1 /arch/powerpc
parent4df489991182d3a9337c0a4b1563077c0004f1ba (diff)
downloadlinux-6e0b8bc965d25a8e0701eaca3fca5941b4f4b2b2.tar.bz2
powerpc/pseries: Inform the hypervisor we are using EBB regs
On LPAR systems we need to inform the hypervisor that we are using the EBB registers. We do this by setting a bit in the Virtual Processor Area (VPA) - formerly known as the lppaca. For now we do this always, ie. we do not dynamically enable/disable. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/include/asm/lppaca.h3
-rw-r--r--arch/powerpc/platforms/pseries/lpar.c3
2 files changed, 5 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/lppaca.h b/arch/powerpc/include/asm/lppaca.h
index b1e7f2af1016..9b12f88d4adb 100644
--- a/arch/powerpc/include/asm/lppaca.h
+++ b/arch/powerpc/include/asm/lppaca.h
@@ -66,7 +66,8 @@ struct lppaca {
u8 reserved6[48];
u8 cede_latency_hint;
- u8 reserved7[7];
+ u8 ebb_regs_in_use;
+ u8 reserved7[6];
u8 dtl_enable_mask; /* Dispatch Trace Log mask */
u8 donate_dedicated_cpu; /* Donate dedicated CPU cycles */
u8 fpregs_in_use;
diff --git a/arch/powerpc/platforms/pseries/lpar.c b/arch/powerpc/platforms/pseries/lpar.c
index fd0f2f2a9b90..02d6e21619bb 100644
--- a/arch/powerpc/platforms/pseries/lpar.c
+++ b/arch/powerpc/platforms/pseries/lpar.c
@@ -71,6 +71,9 @@ void vpa_init(int cpu)
if (cpu_has_feature(CPU_FTR_ALTIVEC))
lppaca_of(cpu).vmxregs_in_use = 1;
+ if (cpu_has_feature(CPU_FTR_ARCH_207S))
+ lppaca_of(cpu).ebb_regs_in_use = 1;
+
addr = __pa(&lppaca_of(cpu));
ret = register_vpa(hwcpu, addr);