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/[email protected]/msg1992923.html https://www.mail-archive.com/[email protected]/msg1992919.html Cc: Thomas Gleixner <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: "H. Peter Anvin" <[email protected]> Cc: "Kirill A. Shutemov" <[email protected]> Cc: Cao jin <[email protected]> Cc: Wei Huang <[email protected]> Cc: Chao Fan <[email protected]> Cc: Nicolai Stange <[email protected]> Cc: Dou Liyang <[email protected]> Cc: [email protected] 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
