linux-kernel - [PATCH 0/4] sparc64: Jump to boot prom from console on panic

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Date:   Fri, 11 Nov 2016 04:38:52 -0800
From:   Vijay Kumar <vijay.ac.kumar@...cle.com>
To:     davem@...emloft.net, sparclinux@...r.kernel.org
Cc:     karl.volz@...cle.com, rob.gardner@...cle.com,
        linux-kernel@...r.kernel.org
Subject: [PATCH 0/4] sparc64: Jump to boot prom from console on panic

Here is the cover posting for  the patches. I did not send cover patch initially
as I thought that patch descriptions were self explanatory. But I agree, this would
help  in overall understanding of the patch.

Currently Stop-A (L1A) does not make the kernel switch to OBP on panic. This
patchset addresses this issue. Also, now we can cause a jump to OBP by sending
'break' twice from sunhv console. On bare metal, one can send a break by
typing Esc + 'B' + Sysrq (or whatever). On LDOM, press Ctrl + ] in telnet,
and then "send break" at the telnet prompt.

      sparc64: Set cpu state to offline when stopped
      sparc64: Migrate hvcons irq to panicked cpu
      sparc64: Send break twice from console to return to boot prom
      Documentation/sparc: Steps for sending break on sunhv console

 Documentation/sparc/console.txt |    9 +++++++++
 arch/sparc/include/asm/setup.h  |    1 +
 arch/sparc/kernel/smp_64.c      |    9 ++++++++-
 drivers/tty/serial/sunhv.c      |   12 +++++++++++-
 kernel/panic.c                  |    3 ++-
 5 files changed, 31 insertions(+), 3 deletions(-)
 create mode 100644 Documentation/sparc/console.txt

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1.7.1