From 68e0aa8ec5cedec48dd5b11df84afc956c8f85be Mon Sep 17 00:00:00 2001 From: Claudio Carvalho Date: Wed, 28 Aug 2019 23:05:21 +1000 Subject: powerpc/powernv: Add ultravisor message log interface The ultravisor (UV) provides an in-memory console which follows the OPAL in-memory console structure. This patch extends the OPAL msglog code to initialize the UV memory console and provide the "/sys/firmware/ultravisor/msglog" interface for userspace to view the UV message log. Signed-off-by: Claudio Carvalho Signed-off-by: Michael Ellerman Tested-by: Claudio Carvalho Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20190828130521.26764-2-mpe@ellerman.id.au --- arch/powerpc/platforms/powernv/powernv.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'arch/powerpc/platforms/powernv/powernv.h') diff --git a/arch/powerpc/platforms/powernv/powernv.h b/arch/powerpc/platforms/powernv/powernv.h index fd4a1c5a6369..1aa51c4fa904 100644 --- a/arch/powerpc/platforms/powernv/powernv.h +++ b/arch/powerpc/platforms/powernv/powernv.h @@ -30,4 +30,9 @@ extern void opal_event_shutdown(void); bool cpu_core_split_required(void); +struct memcons; +ssize_t memcons_copy(struct memcons *mc, char *to, loff_t pos, size_t count); +u32 memcons_get_size(struct memcons *mc); +struct memcons *memcons_init(struct device_node *node, const char *mc_prop_name); + #endif /* _POWERNV_H */ -- cgit v1.2.3