From: AKASHI Takahiro <takahiro.akashi@linaro.org>
To: catalin.marinas@arm.com, will.deacon@arm.com, vgoyal@redhat.com,
hbabus@us.ibm.com
Cc: geoff@infradead.org, broonie@kernel.org, david.griego@linaro.org,
kexec@lists.infradead.org, linux-arm-kernel@lists.infradead.org,
linaro-kernel@lists.linaro.org, linux-kernel@vger.kernel.org,
AKASHI Takahiro <takahiro.akashi@linaro.org>
Subject: [PATCH 3/5] arm64: kdump: do not go into EL2 before starting a crash dump kernel
Date: Thu, 26 Mar 2015 17:28:51 +0900 [thread overview]
Message-ID: <1427358533-3754-4-git-send-email-takahiro.akashi@linaro.org> (raw)
In-Reply-To: <1427358533-3754-1-git-send-email-takahiro.akashi@linaro.org>
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
next prev parent reply other threads:[~2015-03-26 8:31 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-26 8:28 [PATCH 0/5] arm64: add kdump support AKASHI Takahiro
2015-03-26 8:28 ` [PATCH 1/5] arm64: kdump: reserve memory for crash dump kernel AKASHI Takahiro
2015-03-26 18:30 ` Geoff Levand
2015-03-27 4:43 ` Geoff Levand
2015-03-30 2:35 ` AKASHI Takahiro
2015-04-09 13:09 ` Pratyush Anand
2015-04-10 5:57 ` AKASHI Takahiro
2015-04-10 6:35 ` Pratyush Anand
2015-03-26 8:28 ` [PATCH 2/5] arm64: kdump: implement machine_crash_shutdown() AKASHI Takahiro
2015-03-26 8:28 ` AKASHI Takahiro [this message]
2015-03-26 22:29 ` [PATCH 3/5] arm64: kdump: do not go into EL2 before starting a crash dump kernel Geoff Levand
2015-03-30 3:21 ` AKASHI Takahiro
2015-03-26 8:28 ` [PATCH 4/5] arm64: add kdump support AKASHI Takahiro
2015-03-26 8:28 ` [PATCH 5/5] arm64: enable kdump in the arm64 defconfig AKASHI Takahiro
2015-04-01 15:56 ` [PATCH 0/5] arm64: add kdump support Pratyush Anand
2015-04-01 23:27 ` AKASHI Takahiro
2015-04-02 4:58 ` Pratyush Anand
2015-04-02 5:37 ` AKASHI Takahiro
2015-04-02 6:01 ` Pratyush Anand
2015-04-02 7:48 ` AKASHI Takahiro
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