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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2013-05-10 16:59:18 +1000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2013-05-10 16:59:18 +1000
commit73ed148aea9dc0508be7e30e7a447f55c1b2f378 (patch)
tree2571b5d1851a9f2bef62e92def3608f738748251 /arch/powerpc/include/asm
parent1de1455f33709a8afd8d41d26d09739a1148105b (diff)
downloadop-kernel-dev-73ed148aea9dc0508be7e30e7a447f55c1b2f378.zip
op-kernel-dev-73ed148aea9dc0508be7e30e7a447f55c1b2f378.tar.gz
powerpc/powernv: Improve kexec reliability
We add a machine_shutdown hook that frees the OPAL interrupts (so they get masked at the source and don't fire while kexec'ing) and which triggers an IODA reset on all the PCIe host bridges which will have the effect of blocking all DMAs and subsequent PCIs interrupts. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/include/asm')
-rw-r--r--arch/powerpc/include/asm/opal.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/opal.h b/arch/powerpc/include/asm/opal.h
index b6c8b58..b2906ad 100644
--- a/arch/powerpc/include/asm/opal.h
+++ b/arch/powerpc/include/asm/opal.h
@@ -563,6 +563,8 @@ extern void opal_nvram_init(void);
extern int opal_machine_check(struct pt_regs *regs);
+extern void opal_shutdown(void);
+
#endif /* __ASSEMBLY__ */
#endif /* __OPAL_H */
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