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acrn-kernel/arch/csky/include/asm/perf_event.h

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csky: Add perf support for C-SKY This adds basic perf support for all C-SKY CPUs. Hardware events are only supported by 807/810/860. Signed-off-by: Guo Ren <ren_guo@c-sky.com>
2019-01-02 22:09:25 +08:00
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_CSKY_PERF_EVENT_H
#define __ASM_CSKY_PERF_EVENT_H
csky: Add perf_arch_fetch_caller_regs support In trace events as tracepoints context are not able to be retrieve with task_pt_regs. Without arch caller regs support the pt_regs context will be all zero, perf can not parsing the callchain and resolving the symbols correctly, some time will even get into deadlock while handling the page fault, eg: perf kmem —page record ls Changelog - Add test case cmd in comment - Use regs_fp(regs) which is defined in abi/regdef.h Signed-off-by: Mao Han <han_mao@c-sky.com> Signed-off-by: Guo Ren <guoren@kernel.org>
2019-04-10 10:27:10 +08:00
#include <abi/regdef.h>
#define perf_arch_fetch_caller_regs(regs, __ip) { \
(regs)->pc = (__ip); \
regs_fp(regs) = (unsigned long) __builtin_frame_address(0); \
asm volatile("mov %0, sp\n":"=r"((regs)->usp)); \
}
csky: Add perf support for C-SKY This adds basic perf support for all C-SKY CPUs. Hardware events are only supported by 807/810/860. Signed-off-by: Guo Ren <ren_guo@c-sky.com>
2019-01-02 22:09:25 +08:00
#endif /* __ASM_PERF_EVENT_ELF_H */