Messages in this thread | | | From | Pingfan Liu <> | Subject | [PATCH 0/2] x86/boot: support to handle exception in early boot | Date | Tue, 7 May 2019 16:52:29 +0800 |
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The boot code becomes a little complicated, and hits some bugs, e.g. Commit 3a63f70bf4c3a ("x86/boot: Early parse RSDP and save it in boot_params") broke kexec boot on EFI systems.
There is few hint when bug happens. Catching the exception and printing message can give a immediate help, instead of adding more debug_putstr() to narraw down the problem.
Although no functional dependency, but in order to show message, the early console should be ready. I have sent a separate series: https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg1992923.html https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg1992919.html
Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Cao jin <caoj.fnst@cn.fujitsu.com> Cc: Wei Huang <wei@redhat.com> Cc: Chao Fan <fanc.fnst@cn.fujitsu.com> Cc: Nicolai Stange <nstange@suse.de> Cc: Dou Liyang <douly.fnst@cn.fujitsu.com> Cc: linux-kernel@vger.kernel.org
Pingfan Liu (2): x86/idt: split out idt routines x86/boot: set up idt for very early boot stage
arch/x86/boot/compressed/head_64.S | 11 +++++++ arch/x86/boot/compressed/misc.c | 61 ++++++++++++++++++++++++++++++++++++ arch/x86/include/asm/idt.h | 64 ++++++++++++++++++++++++++++++++++++++ arch/x86/kernel/idt.c | 58 +--------------------------------- 4 files changed, 137 insertions(+), 57 deletions(-) create mode 100644 arch/x86/include/asm/idt.h
-- 2.7.4
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