Commit 6e710f43 authored by Mao Minkai's avatar Mao Minkai Committed by guzitao
Browse files

libbpf: add sw64 support 

Sunway inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/IB73UR



--------------------------------

Add __NR_bpf, bpf_target_sw64, PT_REGS_xxx and libbpf_smp barriers for
sw64.

Signed-off-by: default avatarMao Minkai <maominkai@wxiat.com>
Reviewed-by: default avatarHe Sheng <hesheng@wxiat.com>
Signed-off-by: default avatarGu Zitao <guzitao@wxiat.com>
parent 66f8ca23

tools/lib/bpf/bpf.c

+2 −0
Original line number Diff line number Diff line
@@ -59,6 +59,8 @@ 
#  define __NR_bpf 6319

# elif defined(__mips__) && defined(_ABI64)

#  define __NR_bpf 5315

# elif defined(__sw_64__)

#  define __NR_bpf 170

# else

#  error __NR_bpf not defined. libbpf does not support your arch.

# endif

tools/lib/bpf/bpf_tracing.h

+34 −0
Original line number Diff line number Diff line
@@ -35,6 +35,9 @@ 
#elif defined(__TARGET_ARCH_loongarch)

	#define bpf_target_loongarch

	#define bpf_target_defined

#elif defined(__TARGET_ARCH_sw_64)

	#define bpf_target_sw64

	#define bpf_target_defined

#else



/* Fall back to what the compiler says */
@@ -68,6 +71,9 @@ 
#elif defined(__loongarch__)

	#define bpf_target_loongarch

	#define bpf_target_defined

#elif defined(__sw_64__)

	#define bpf_target_sw64

	#define bpf_target_defined

#endif /* no compiler target */



#endif
@@ -441,6 +447,34 @@ struct pt_regs___arm64 { 
#define __PT_SP_REG regs[3]

#define __PT_IP_REG csr_era



#elif defined(bpf_target_sw64)



/* sw64 provides struct user_pt_regs instead of struct pt_regs to userspace */

struct pt_regs;

#define PT_REGS_SW64 const volatile struct user_pt_regs

#define PT_REGS_PARM1(x) (((PT_REGS_SW64 *)(x))->regs[16])

#define PT_REGS_PARM2(x) (((PT_REGS_SW64 *)(x))->regs[17])

#define PT_REGS_PARM3(x) (((PT_REGS_SW64 *)(x))->regs[18])

#define PT_REGS_PARM4(x) (((PT_REGS_SW64 *)(x))->regs[19])

#define PT_REGS_PARM5(x) (((PT_REGS_SW64 *)(x))->regs[20])

#define PT_REGS_RET(x) (((PT_REGS_SW64 *)(x))->regs[26])

/* Works only with CONFIG_FRAME_POINTER */

#define PT_REGS_FP(x) (((PT_REGS_SW64 *)(x))->regs[15])

#define PT_REGS_RC(x) (((PT_REGS_SW64 *)(x))->regs[0])

#define PT_REGS_SP(x) (((PT_REGS_SW64 *)(x))->regs[30])

#define PT_REGS_IP(x) (((PT_REGS_SW64 *)(x))->pc)



#define PT_REGS_PARM1_CORE(x) BPF_CORE_READ((PT_REGS_SW64 *)(x), regs[16])

#define PT_REGS_PARM2_CORE(x) BPF_CORE_READ((PT_REGS_SW64 *)(x), regs[17])

#define PT_REGS_PARM3_CORE(x) BPF_CORE_READ((PT_REGS_SW64 *)(x), regs[18])

#define PT_REGS_PARM4_CORE(x) BPF_CORE_READ((PT_REGS_SW64 *)(x), regs[19])

#define PT_REGS_PARM5_CORE(x) BPF_CORE_READ((PT_REGS_SW64 *)(x), regs[20])

#define PT_REGS_RET_CORE(x) BPF_CORE_READ((PT_REGS_SW64 *)(x), regs[26])

#define PT_REGS_FP_CORE(x) BPF_CORE_READ((PT_REGS_SW64 *)(x), regs[15])

#define PT_REGS_RC_CORE(x) BPF_CORE_READ((PT_REGS_SW64 *)(x), regs[0])

#define PT_REGS_SP_CORE(x) BPF_CORE_READ((PT_REGS_SW64 *)(x), regs[30])

#define PT_REGS_IP_CORE(x) BPF_CORE_READ((PT_REGS_SW64 *)(x), pc)



#endif



#if defined(bpf_target_defined)