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Subject[v2 3/5] arm64: kdump: do not go into EL2 before starting a crash dump kernel
Date
Unlike normal kexec case, we don't have a chance to reset EL2 context in
a generic way because bad exceptions may directly invoke crash_kexec().
(See die().)
Kvm is not useful on crash dump kernel anyway, and so we let it
un-initialized across rebooting.

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
---
arch/arm64/kernel/process.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c
index d894d3e..9859f5c 100644
--- a/arch/arm64/kernel/process.c
+++ b/arch/arm64/kernel/process.c
@@ -48,6 +48,7 @@
#include <asm/compat.h>
#include <asm/cacheflush.h>
#include <asm/fpsimd.h>
+#include <asm/kexec.h>
#include <asm/mmu_context.h>
#include <asm/processor.h>
#include <asm/stacktrace.h>
@@ -64,7 +65,11 @@ void soft_restart(unsigned long addr)
setup_mm_for_reboot();

cpu_soft_restart(virt_to_phys(cpu_reset),
- is_hyp_mode_available(), addr);
+#ifdef CONFIG_KEXEC
+ !in_crash_kexec &&
+#endif
+ is_hyp_mode_available(),
+ addr);

/* Should never get here */
BUG();
--
1.7.9.5


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