From: Wei Jiangang <weijg.fnst@cn.fujitsu.com> To: <linux-kernel@vger.kernel.org> Cc: <x86@kernel.org>, <kexec@lists.infradead.org>, <tglx@linutronix.de>, <mingo@redhat.com>, <hpa@zytor.com>, <ebiederm@xmission.com>, <kernel@kyup.com>, <bhe@redhat.com>, <xpang@redhat.com>, <joro@8bytes.org>, Wei Jiangang <weijg.fnst@cn.fujitsu.com>, Cao jin <caoj.fnst@cn.fujitsu.com> Subject: [PATCH v2 1/3] x86/apic: Remove "focus disabled" for 64bit case Date: Tue, 26 Jul 2016 10:59:53 +0800 [thread overview] Message-ID: <1469501995-2991-2-git-send-email-weijg.fnst@cn.fujitsu.com> (raw) In-Reply-To: <1469501995-2991-1-git-send-email-weijg.fnst@cn.fujitsu.com> Disable processor focus for 64bit causes a crash, Call Trace as following: [<ffffffff8133499f>] dump_stack+0x63/0x84 [<ffffffff810800f1>] __warn+0xd1/0xf0 [<ffffffff8108016f>] warn_slowpath_fmt+0x5f/0x80 [<ffffffff81068ab2>] ex_handler_wrmsr_unsafe+0x62/0x70 [<ffffffff81068b29>] fixup_exception+0x39/0x50 [<ffffffff8102e030>] do_general_protection+0x80/0x160 [<ffffffff816a89a8>] general_protection+0x28/0x30 [<ffffffff81062554>] ? native_write_msr+0x4/0x30 [<ffffffff81059c52>] ? native_apic_msr_write+0x32/0x40 [<ffffffff81d92964>] init_bsp_APIC+0x5f/0x118 [<ffffffff81d87489>] init_ISA_irqs+0x19/0x4c [<ffffffff81d87512>] native_init_IRQ+0xd/0x377 [<ffffffff81d874fe>] init_IRQ+0x42/0x49 [<ffffffff81d7afc6>] start_kernel+0x2ce/0x4c8 [<ffffffff81d7aae6>] ? set_init_arg+0x55/0x55 [<ffffffff81d7a120>] ? early_idt_handler_array+0x120/0x120 [<ffffffff81d7a5db>] x86_64_start_reservations+0x2f/0x31 [<ffffffff81d7a729>] x86_64_start_kernel+0x14c/0x16f Keep a consistent implementation with the setup_local_APIC(), always use processor focus for 64bit. more details refer to commit 89c38c2867eb ("x86: apic - unify setup_local_APIC") Signed-off-by: Cao jin <caoj.fnst@cn.fujitsu.com> Signed-off-by: Wei Jiangang <weijg.fnst@cn.fujitsu.com> --- arch/x86/kernel/apic/apic.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c index 60078a67d7e3..0273b652c689 100644 --- a/arch/x86/kernel/apic/apic.c +++ b/arch/x86/kernel/apic/apic.c @@ -1154,9 +1154,7 @@ void __init init_bsp_APIC(void) if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) && (boot_cpu_data.x86 == 15)) value &= ~APIC_SPIV_FOCUS_DISABLED; - else #endif - value |= APIC_SPIV_FOCUS_DISABLED; value |= SPURIOUS_APIC_VECTOR; apic_write(APIC_SPIV, value); -- 1.9.3
WARNING: multiple messages have this Message-ID (diff)
From: Wei Jiangang <weijg.fnst@cn.fujitsu.com> To: linux-kernel@vger.kernel.org Cc: bhe@redhat.com, xpang@redhat.com, joro@8bytes.org, x86@kernel.org, kexec@lists.infradead.org, Cao jin <caoj.fnst@cn.fujitsu.com>, mingo@redhat.com, kernel@kyup.com, ebiederm@xmission.com, hpa@zytor.com, tglx@linutronix.de, Wei Jiangang <weijg.fnst@cn.fujitsu.com> Subject: [PATCH v2 1/3] x86/apic: Remove "focus disabled" for 64bit case Date: Tue, 26 Jul 2016 10:59:53 +0800 [thread overview] Message-ID: <1469501995-2991-2-git-send-email-weijg.fnst@cn.fujitsu.com> (raw) In-Reply-To: <1469501995-2991-1-git-send-email-weijg.fnst@cn.fujitsu.com> Disable processor focus for 64bit causes a crash, Call Trace as following: [<ffffffff8133499f>] dump_stack+0x63/0x84 [<ffffffff810800f1>] __warn+0xd1/0xf0 [<ffffffff8108016f>] warn_slowpath_fmt+0x5f/0x80 [<ffffffff81068ab2>] ex_handler_wrmsr_unsafe+0x62/0x70 [<ffffffff81068b29>] fixup_exception+0x39/0x50 [<ffffffff8102e030>] do_general_protection+0x80/0x160 [<ffffffff816a89a8>] general_protection+0x28/0x30 [<ffffffff81062554>] ? native_write_msr+0x4/0x30 [<ffffffff81059c52>] ? native_apic_msr_write+0x32/0x40 [<ffffffff81d92964>] init_bsp_APIC+0x5f/0x118 [<ffffffff81d87489>] init_ISA_irqs+0x19/0x4c [<ffffffff81d87512>] native_init_IRQ+0xd/0x377 [<ffffffff81d874fe>] init_IRQ+0x42/0x49 [<ffffffff81d7afc6>] start_kernel+0x2ce/0x4c8 [<ffffffff81d7aae6>] ? set_init_arg+0x55/0x55 [<ffffffff81d7a120>] ? early_idt_handler_array+0x120/0x120 [<ffffffff81d7a5db>] x86_64_start_reservations+0x2f/0x31 [<ffffffff81d7a729>] x86_64_start_kernel+0x14c/0x16f Keep a consistent implementation with the setup_local_APIC(), always use processor focus for 64bit. more details refer to commit 89c38c2867eb ("x86: apic - unify setup_local_APIC") Signed-off-by: Cao jin <caoj.fnst@cn.fujitsu.com> Signed-off-by: Wei Jiangang <weijg.fnst@cn.fujitsu.com> --- arch/x86/kernel/apic/apic.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c index 60078a67d7e3..0273b652c689 100644 --- a/arch/x86/kernel/apic/apic.c +++ b/arch/x86/kernel/apic/apic.c @@ -1154,9 +1154,7 @@ void __init init_bsp_APIC(void) if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) && (boot_cpu_data.x86 == 15)) value &= ~APIC_SPIV_FOCUS_DISABLED; - else #endif - value |= APIC_SPIV_FOCUS_DISABLED; value |= SPURIOUS_APIC_VECTOR; apic_write(APIC_SPIV, value); -- 1.9.3 _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec
next prev parent reply other threads:[~2016-07-26 3:04 UTC|newest] Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top 2016-07-26 2:59 [PATCH v2 0/3] Fix dump-capture kernel hangs with notsc Wei Jiangang 2016-07-26 2:59 ` Wei Jiangang 2016-07-26 2:59 ` Wei Jiangang [this message] 2016-07-26 2:59 ` [PATCH v2 1/3] x86/apic: Remove "focus disabled" for 64bit case Wei Jiangang 2016-07-26 2:59 ` [PATCH v2 2/3] x86/apic: Update comment about disabling processor focus Wei Jiangang 2016-07-26 2:59 ` Wei Jiangang 2016-07-26 2:59 ` [PATCH v2 3/3] x86/apic: Improved the setting of interrupt mode for bsp Wei Jiangang 2016-07-26 2:59 ` Wei Jiangang 2016-07-26 3:53 ` Eric W. Biederman 2016-07-26 3:53 ` Eric W. Biederman 2016-07-26 8:05 ` Wei, Jiangang 2016-07-26 8:05 ` Wei, Jiangang 2016-08-02 14:26 ` Eric W. Biederman 2016-08-02 14:26 ` Eric W. Biederman 2016-08-04 10:17 ` Wei, Jiangang 2016-08-04 10:17 ` Wei, Jiangang 2016-08-04 13:52 ` Eric W. Biederman 2016-08-04 13:52 ` Eric W. Biederman 2016-08-01 6:44 ` [PATCH v2 0/3] Fix dump-capture kernel hangs with notsc Wei, Jiangang 2016-08-01 6:44 ` Wei, Jiangang 2016-08-01 17:09 ` Eric W. Biederman 2016-08-01 17:09 ` Eric W. Biederman 2016-08-02 7:45 ` Wei, Jiangang 2016-08-02 7:45 ` Wei, Jiangang 2016-08-02 14:21 ` bhe 2016-08-02 14:21 ` bhe
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