[PATCH 0/2] x86/boot: support to handle exception in early boot

[Pingfan Liu]

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@xxxxxxxxxxxxxxx/msg1992923.html
https://www.mail-archive.com/linux-kernel@xxxxxxxxxxxxxxx/msg1992919.html

Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Cao jin <caoj.fnst@xxxxxxxxxxxxxx>
Cc: Wei Huang <wei@xxxxxxxxxx>
Cc: Chao Fan <fanc.fnst@xxxxxxxxxxxxxx>
Cc: Nicolai Stange <nstange@xxxxxxx>
Cc: Dou Liyang <douly.fnst@xxxxxxxxxxxxxx>
Cc: linux-kernel@xxxxxxxxxxxxxxx

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