From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759875Ab3BZJYo (ORCPT ); Tue, 26 Feb 2013 04:24:44 -0500 Received: from mail1.windriver.com ([147.11.146.13]:60739 "EHLO mail1.windriver.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750981Ab3BZJT6 (ORCPT ); Tue, 26 Feb 2013 04:19:58 -0500 From: Tiejun Chen To: , CC: , Subject: [v1][PATCH 2/7] book3e/kexec/kdump: enable kexec for kernel Date: Tue, 26 Feb 2013 17:19:37 +0800 Message-ID: <1361870382-743-3-git-send-email-tiejun.chen@windriver.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1361870382-743-1-git-send-email-tiejun.chen@windriver.com> References: <1361870382-743-1-git-send-email-tiejun.chen@windriver.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org We need to active KEXEC for book3e and bypass or convert non-book3e stuff in kexec coverage. Signed-off-by: Tiejun Chen --- arch/powerpc/Kconfig | 2 +- arch/powerpc/kernel/machine_kexec_64.c | 6 ++++++ arch/powerpc/kernel/misc_64.S | 6 ++++++ 3 files changed, 13 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 85ff3a0..d6d1a02 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -370,7 +370,7 @@ config ARCH_ENABLE_MEMORY_HOTREMOVE config KEXEC bool "kexec system call (EXPERIMENTAL)" - depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) && EXPERIMENTAL + depends on (PPC_BOOK3S || FSL_BOOKE || PPC_BOOK3E || (44x && !SMP)) && EXPERIMENTAL help kexec is a system call that implements the ability to shutdown your current kernel, and to start another kernel. It is like a reboot diff --git a/arch/powerpc/kernel/machine_kexec_64.c b/arch/powerpc/kernel/machine_kexec_64.c index 466a290..a1222c8 100644 --- a/arch/powerpc/kernel/machine_kexec_64.c +++ b/arch/powerpc/kernel/machine_kexec_64.c @@ -32,6 +32,7 @@ int default_machine_kexec_prepare(struct kimage *image) { int i; +#ifndef CONFIG_PPC_BOOK3E unsigned long begin, end; /* limits of segment */ unsigned long low, high; /* limits of blocked memory range */ struct device_node *node; @@ -40,6 +41,7 @@ int default_machine_kexec_prepare(struct kimage *image) if (!ppc_md.hpte_clear_all) return -ENOENT; +#endif /* * Since we use the kernel fault handlers and paging code to @@ -50,6 +52,7 @@ int default_machine_kexec_prepare(struct kimage *image) if (image->segment[i].mem < __pa(_end)) return -ETXTBSY; +#ifndef CONFIG_PPC_BOOK3E /* * For non-LPAR, we absolutely can not overwrite the mmu hash * table, since we are still using the bolted entries in it to @@ -91,6 +94,7 @@ int default_machine_kexec_prepare(struct kimage *image) return -ETXTBSY; } } +#endif return 0; } @@ -363,6 +367,7 @@ void default_machine_kexec(struct kimage *image) /* NOTREACHED */ } +#ifndef CONFIG_PPC_BOOK3E /* Values we need to export to the second kernel via the device tree. */ static unsigned long htab_base; @@ -407,3 +412,4 @@ static int __init export_htab_values(void) return 0; } late_initcall(export_htab_values); +#endif diff --git a/arch/powerpc/kernel/misc_64.S b/arch/powerpc/kernel/misc_64.S index 5cfa800..c2acf8c 100644 --- a/arch/powerpc/kernel/misc_64.S +++ b/arch/powerpc/kernel/misc_64.S @@ -532,9 +532,13 @@ _GLOBAL(kexec_sequence) lhz r25,PACAHWCPUID(r13) /* get our phys cpu from paca */ /* disable interrupts, we are overwriting kernel data next */ +#ifndef CONFIG_PPC_BOOK3E mfmsr r3 rlwinm r3,r3,0,17,15 mtmsrd r3,1 +#else + wrteei 0 +#endif /* copy dest pages, flush whole dest image */ mr r3,r29 @@ -556,10 +560,12 @@ _GLOBAL(kexec_sequence) li r6,1 stw r6,kexec_flag-1b(5) +#ifndef CONFIG_PPC_BOOK3E /* clear out hardware hash page table and tlb */ ld r5,0(r27) /* deref function descriptor */ mtctr r5 bctrl /* ppc_md.hpte_clear_all(void); */ +#endif /* * kexec image calling is: -- 1.7.9.5