From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Michael Ellerman To: Subject: [PATCH 9/9] powerpc/pseries: Inform the hypervisor we are using EBB regs Date: Fri, 28 Jun 2013 18:15:18 +1000 Message-Id: <1372407319-718-9-git-send-email-michael@ellerman.id.au> In-Reply-To: <1372407319-718-1-git-send-email-michael@ellerman.id.au> References: <1372407319-718-1-git-send-email-michael@ellerman.id.au> Cc: sukadev@linux.vnet.ibm.com, Paul Mackerras , khandual@linux.vnet.ibm.com List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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 --- arch/powerpc/include/asm/lppaca.h | 3 ++- arch/powerpc/platforms/pseries/lpar.c | 3 +++ 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/include/asm/lppaca.h b/arch/powerpc/include/asm/lppaca.h index b1e7f2a..9b12f88 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 fd0f2f2..02d6e21 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); -- 1.7.10.4