214af5d355
commit d715e433b7ad19c02fc4becf0d5e9a59f97925de upstream. kdump fails because we try to execute an HV only instruction. Feature fixups are being applied after we copy the exception vectors down to 0 so they miss out on any updates. We have always had this issue but it only became critical in v3.0 when we added CFAR support (breaks POWER5) and v3.1 when we added POWERNV (breaks everyone). Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
54 lines
1.3 KiB
C
54 lines
1.3 KiB
C
#ifndef _ASM_POWERPC_SYNCH_H
|
|
#define _ASM_POWERPC_SYNCH_H
|
|
#ifdef __KERNEL__
|
|
|
|
#include <linux/stringify.h>
|
|
#include <asm/feature-fixups.h>
|
|
|
|
#if defined(__powerpc64__) || defined(CONFIG_PPC_E500MC)
|
|
#define __SUBARCH_HAS_LWSYNC
|
|
#endif
|
|
|
|
#ifndef __ASSEMBLY__
|
|
extern unsigned int __start___lwsync_fixup, __stop___lwsync_fixup;
|
|
extern void do_lwsync_fixups(unsigned long value, void *fixup_start,
|
|
void *fixup_end);
|
|
extern void do_final_fixups(void);
|
|
|
|
static inline void eieio(void)
|
|
{
|
|
__asm__ __volatile__ ("eieio" : : : "memory");
|
|
}
|
|
|
|
static inline void isync(void)
|
|
{
|
|
__asm__ __volatile__ ("isync" : : : "memory");
|
|
}
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#if defined(__powerpc64__)
|
|
# define LWSYNC lwsync
|
|
#elif defined(CONFIG_E500)
|
|
# define LWSYNC \
|
|
START_LWSYNC_SECTION(96); \
|
|
sync; \
|
|
MAKE_LWSYNC_SECTION_ENTRY(96, __lwsync_fixup);
|
|
#else
|
|
# define LWSYNC sync
|
|
#endif
|
|
|
|
#ifdef CONFIG_SMP
|
|
#define __PPC_ACQUIRE_BARRIER \
|
|
START_LWSYNC_SECTION(97); \
|
|
isync; \
|
|
MAKE_LWSYNC_SECTION_ENTRY(97, __lwsync_fixup);
|
|
#define PPC_ACQUIRE_BARRIER "\n" stringify_in_c(__PPC_ACQUIRE_BARRIER)
|
|
#define PPC_RELEASE_BARRIER stringify_in_c(LWSYNC) "\n"
|
|
#else
|
|
#define PPC_ACQUIRE_BARRIER
|
|
#define PPC_RELEASE_BARRIER
|
|
#endif
|
|
|
|
#endif /* __KERNEL__ */
|
|
#endif /* _ASM_POWERPC_SYNCH_H */
|