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Date: Thu, 16 Feb 2023 10:31:06 -0800
From: Stanislav Fomichev <sdf@...gle.com>
To: Tiezhu Yang <yangtiezhu@...ngson.cn>
Cc: Alexei Starovoitov <ast@...nel.org>,
Daniel Borkmann <daniel@...earbox.net>,
Andrii Nakryiko <andrii@...nel.org>, bpf@...r.kernel.org,
acme@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH bpf-next] selftests/bpf: Remove not used headers
On 02/16, Tiezhu Yang wrote:
> The following three uapi headers:
> tools/arch/arm64/include/uapi/asm/bpf_perf_event.h
> tools/arch/s390/include/uapi/asm/bpf_perf_event.h
> tools/arch/s390/include/uapi/asm/ptrace.h
> were introduced in commit 618e165b2a8e ("selftests/bpf: sync kernel
> headers
> and introduce arch support in Makefile"), they are not used any more after
> commit 720f228e8d31 ("bpf: fix broken BPF selftest build"), so remove
> them.
Let's maybe CC Arnaldo to make sure it doesn't affect perf? BPF build
bots are happy it seems.
> Signed-off-by: Tiezhu Yang <yangtiezhu@...ngson.cn>
> ---
> tools/arch/arm64/include/uapi/asm/bpf_perf_event.h | 9 -
> tools/arch/s390/include/uapi/asm/bpf_perf_event.h | 9 -
> tools/arch/s390/include/uapi/asm/ptrace.h | 458
> ---------------------
> 3 files changed, 476 deletions(-)
> delete mode 100644 tools/arch/arm64/include/uapi/asm/bpf_perf_event.h
> delete mode 100644 tools/arch/s390/include/uapi/asm/bpf_perf_event.h
> delete mode 100644 tools/arch/s390/include/uapi/asm/ptrace.h
> diff --git a/tools/arch/arm64/include/uapi/asm/bpf_perf_event.h
> b/tools/arch/arm64/include/uapi/asm/bpf_perf_event.h
> deleted file mode 100644
> index b551b74..0000000
> --- a/tools/arch/arm64/include/uapi/asm/bpf_perf_event.h
> +++ /dev/null
> @@ -1,9 +0,0 @@
> -/* SPDX-License-Identifier: GPL-2.0 */
> -#ifndef _UAPI__ASM_BPF_PERF_EVENT_H__
> -#define _UAPI__ASM_BPF_PERF_EVENT_H__
> -
> -#include <asm/ptrace.h>
> -
> -typedef struct user_pt_regs bpf_user_pt_regs_t;
> -
> -#endif /* _UAPI__ASM_BPF_PERF_EVENT_H__ */
> diff --git a/tools/arch/s390/include/uapi/asm/bpf_perf_event.h
> b/tools/arch/s390/include/uapi/asm/bpf_perf_event.h
> deleted file mode 100644
> index 0a8e37a..0000000
> --- a/tools/arch/s390/include/uapi/asm/bpf_perf_event.h
> +++ /dev/null
> @@ -1,9 +0,0 @@
> -/* SPDX-License-Identifier: GPL-2.0 */
> -#ifndef _UAPI__ASM_BPF_PERF_EVENT_H__
> -#define _UAPI__ASM_BPF_PERF_EVENT_H__
> -
> -#include "ptrace.h"
> -
> -typedef user_pt_regs bpf_user_pt_regs_t;
> -
> -#endif /* _UAPI__ASM_BPF_PERF_EVENT_H__ */
> diff --git a/tools/arch/s390/include/uapi/asm/ptrace.h
> b/tools/arch/s390/include/uapi/asm/ptrace.h
> deleted file mode 100644
> index ad64d67..0000000
> --- a/tools/arch/s390/include/uapi/asm/ptrace.h
> +++ /dev/null
> @@ -1,458 +0,0 @@
> -/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
> -/*
> - * S390 version
> - * Copyright IBM Corp. 1999, 2000
> - * Author(s): Denis Joseph Barrow
> (djbarrow@...ibm.com,barrow_dj@...oo.com)
> - */
> -
> -#ifndef _UAPI_S390_PTRACE_H
> -#define _UAPI_S390_PTRACE_H
> -
> -/*
> - * Offsets in the user_regs_struct. They are used for the ptrace
> - * system call and in entry.S
> - */
> -#ifndef __s390x__
> -
> -#define PT_PSWMASK 0x00
> -#define PT_PSWADDR 0x04
> -#define PT_GPR0 0x08
> -#define PT_GPR1 0x0C
> -#define PT_GPR2 0x10
> -#define PT_GPR3 0x14
> -#define PT_GPR4 0x18
> -#define PT_GPR5 0x1C
> -#define PT_GPR6 0x20
> -#define PT_GPR7 0x24
> -#define PT_GPR8 0x28
> -#define PT_GPR9 0x2C
> -#define PT_GPR10 0x30
> -#define PT_GPR11 0x34
> -#define PT_GPR12 0x38
> -#define PT_GPR13 0x3C
> -#define PT_GPR14 0x40
> -#define PT_GPR15 0x44
> -#define PT_ACR0 0x48
> -#define PT_ACR1 0x4C
> -#define PT_ACR2 0x50
> -#define PT_ACR3 0x54
> -#define PT_ACR4 0x58
> -#define PT_ACR5 0x5C
> -#define PT_ACR6 0x60
> -#define PT_ACR7 0x64
> -#define PT_ACR8 0x68
> -#define PT_ACR9 0x6C
> -#define PT_ACR10 0x70
> -#define PT_ACR11 0x74
> -#define PT_ACR12 0x78
> -#define PT_ACR13 0x7C
> -#define PT_ACR14 0x80
> -#define PT_ACR15 0x84
> -#define PT_ORIGGPR2 0x88
> -#define PT_FPC 0x90
> -/*
> - * A nasty fact of life that the ptrace api
> - * only supports passing of longs.
> - */
> -#define PT_FPR0_HI 0x98
> -#define PT_FPR0_LO 0x9C
> -#define PT_FPR1_HI 0xA0
> -#define PT_FPR1_LO 0xA4
> -#define PT_FPR2_HI 0xA8
> -#define PT_FPR2_LO 0xAC
> -#define PT_FPR3_HI 0xB0
> -#define PT_FPR3_LO 0xB4
> -#define PT_FPR4_HI 0xB8
> -#define PT_FPR4_LO 0xBC
> -#define PT_FPR5_HI 0xC0
> -#define PT_FPR5_LO 0xC4
> -#define PT_FPR6_HI 0xC8
> -#define PT_FPR6_LO 0xCC
> -#define PT_FPR7_HI 0xD0
> -#define PT_FPR7_LO 0xD4
> -#define PT_FPR8_HI 0xD8
> -#define PT_FPR8_LO 0XDC
> -#define PT_FPR9_HI 0xE0
> -#define PT_FPR9_LO 0xE4
> -#define PT_FPR10_HI 0xE8
> -#define PT_FPR10_LO 0xEC
> -#define PT_FPR11_HI 0xF0
> -#define PT_FPR11_LO 0xF4
> -#define PT_FPR12_HI 0xF8
> -#define PT_FPR12_LO 0xFC
> -#define PT_FPR13_HI 0x100
> -#define PT_FPR13_LO 0x104
> -#define PT_FPR14_HI 0x108
> -#define PT_FPR14_LO 0x10C
> -#define PT_FPR15_HI 0x110
> -#define PT_FPR15_LO 0x114
> -#define PT_CR_9 0x118
> -#define PT_CR_10 0x11C
> -#define PT_CR_11 0x120
> -#define PT_IEEE_IP 0x13C
> -#define PT_LASTOFF PT_IEEE_IP
> -#define PT_ENDREGS 0x140-1
> -
> -#define GPR_SIZE 4
> -#define CR_SIZE 4
> -
> -#define STACK_FRAME_OVERHEAD 96 /* size of minimum stack frame */
> -
> -#else /* __s390x__ */
> -
> -#define PT_PSWMASK 0x00
> -#define PT_PSWADDR 0x08
> -#define PT_GPR0 0x10
> -#define PT_GPR1 0x18
> -#define PT_GPR2 0x20
> -#define PT_GPR3 0x28
> -#define PT_GPR4 0x30
> -#define PT_GPR5 0x38
> -#define PT_GPR6 0x40
> -#define PT_GPR7 0x48
> -#define PT_GPR8 0x50
> -#define PT_GPR9 0x58
> -#define PT_GPR10 0x60
> -#define PT_GPR11 0x68
> -#define PT_GPR12 0x70
> -#define PT_GPR13 0x78
> -#define PT_GPR14 0x80
> -#define PT_GPR15 0x88
> -#define PT_ACR0 0x90
> -#define PT_ACR1 0x94
> -#define PT_ACR2 0x98
> -#define PT_ACR3 0x9C
> -#define PT_ACR4 0xA0
> -#define PT_ACR5 0xA4
> -#define PT_ACR6 0xA8
> -#define PT_ACR7 0xAC
> -#define PT_ACR8 0xB0
> -#define PT_ACR9 0xB4
> -#define PT_ACR10 0xB8
> -#define PT_ACR11 0xBC
> -#define PT_ACR12 0xC0
> -#define PT_ACR13 0xC4
> -#define PT_ACR14 0xC8
> -#define PT_ACR15 0xCC
> -#define PT_ORIGGPR2 0xD0
> -#define PT_FPC 0xD8
> -#define PT_FPR0 0xE0
> -#define PT_FPR1 0xE8
> -#define PT_FPR2 0xF0
> -#define PT_FPR3 0xF8
> -#define PT_FPR4 0x100
> -#define PT_FPR5 0x108
> -#define PT_FPR6 0x110
> -#define PT_FPR7 0x118
> -#define PT_FPR8 0x120
> -#define PT_FPR9 0x128
> -#define PT_FPR10 0x130
> -#define PT_FPR11 0x138
> -#define PT_FPR12 0x140
> -#define PT_FPR13 0x148
> -#define PT_FPR14 0x150
> -#define PT_FPR15 0x158
> -#define PT_CR_9 0x160
> -#define PT_CR_10 0x168
> -#define PT_CR_11 0x170
> -#define PT_IEEE_IP 0x1A8
> -#define PT_LASTOFF PT_IEEE_IP
> -#define PT_ENDREGS 0x1B0-1
> -
> -#define GPR_SIZE 8
> -#define CR_SIZE 8
> -
> -#define STACK_FRAME_OVERHEAD 160 /* size of minimum stack frame */
> -
> -#endif /* __s390x__ */
> -
> -#define NUM_GPRS 16
> -#define NUM_FPRS 16
> -#define NUM_CRS 16
> -#define NUM_ACRS 16
> -
> -#define NUM_CR_WORDS 3
> -
> -#define FPR_SIZE 8
> -#define FPC_SIZE 4
> -#define FPC_PAD_SIZE 4 /* gcc insists on aligning the fpregs */
> -#define ACR_SIZE 4
> -
> -
> -#define PTRACE_OLDSETOPTIONS 21
> -#define PTRACE_SYSEMU 31
> -#define PTRACE_SYSEMU_SINGLESTEP 32
> -#ifndef __ASSEMBLY__
> -#include <linux/stddef.h>
> -#include <linux/types.h>
> -
> -typedef union {
> - float f;
> - double d;
> - __u64 ui;
> - struct
> - {
> - __u32 hi;
> - __u32 lo;
> - } fp;
> -} freg_t;
> -
> -typedef struct {
> - __u32 fpc;
> - __u32 pad;
> - freg_t fprs[NUM_FPRS];
> -} s390_fp_regs;
> -
> -#define FPC_EXCEPTION_MASK 0xF8000000
> -#define FPC_FLAGS_MASK 0x00F80000
> -#define FPC_DXC_MASK 0x0000FF00
> -#define FPC_RM_MASK 0x00000003
> -
> -/* this typedef defines how a Program Status Word looks like */
> -typedef struct {
> - unsigned long mask;
> - unsigned long addr;
> -} __attribute__ ((aligned(8))) psw_t;
> -
> -#ifndef __s390x__
> -
> -#define PSW_MASK_PER 0x40000000UL
> -#define PSW_MASK_DAT 0x04000000UL
> -#define PSW_MASK_IO 0x02000000UL
> -#define PSW_MASK_EXT 0x01000000UL
> -#define PSW_MASK_KEY 0x00F00000UL
> -#define PSW_MASK_BASE 0x00080000UL /* always one */
> -#define PSW_MASK_MCHECK 0x00040000UL
> -#define PSW_MASK_WAIT 0x00020000UL
> -#define PSW_MASK_PSTATE 0x00010000UL
> -#define PSW_MASK_ASC 0x0000C000UL
> -#define PSW_MASK_CC 0x00003000UL
> -#define PSW_MASK_PM 0x00000F00UL
> -#define PSW_MASK_RI 0x00000000UL
> -#define PSW_MASK_EA 0x00000000UL
> -#define PSW_MASK_BA 0x00000000UL
> -
> -#define PSW_MASK_USER 0x0000FF00UL
> -
> -#define PSW_ADDR_AMODE 0x80000000UL
> -#define PSW_ADDR_INSN 0x7FFFFFFFUL
> -
> -#define PSW_DEFAULT_KEY (((unsigned long) PAGE_DEFAULT_ACC) << 20)
> -
> -#define PSW_ASC_PRIMARY 0x00000000UL
> -#define PSW_ASC_ACCREG 0x00004000UL
> -#define PSW_ASC_SECONDARY 0x00008000UL
> -#define PSW_ASC_HOME 0x0000C000UL
> -
> -#else /* __s390x__ */
> -
> -#define PSW_MASK_PER 0x4000000000000000UL
> -#define PSW_MASK_DAT 0x0400000000000000UL
> -#define PSW_MASK_IO 0x0200000000000000UL
> -#define PSW_MASK_EXT 0x0100000000000000UL
> -#define PSW_MASK_BASE 0x0000000000000000UL
> -#define PSW_MASK_KEY 0x00F0000000000000UL
> -#define PSW_MASK_MCHECK 0x0004000000000000UL
> -#define PSW_MASK_WAIT 0x0002000000000000UL
> -#define PSW_MASK_PSTATE 0x0001000000000000UL
> -#define PSW_MASK_ASC 0x0000C00000000000UL
> -#define PSW_MASK_CC 0x0000300000000000UL
> -#define PSW_MASK_PM 0x00000F0000000000UL
> -#define PSW_MASK_RI 0x0000008000000000UL
> -#define PSW_MASK_EA 0x0000000100000000UL
> -#define PSW_MASK_BA 0x0000000080000000UL
> -
> -#define PSW_MASK_USER 0x0000FF0180000000UL
> -
> -#define PSW_ADDR_AMODE 0x0000000000000000UL
> -#define PSW_ADDR_INSN 0xFFFFFFFFFFFFFFFFUL
> -
> -#define PSW_DEFAULT_KEY (((unsigned long) PAGE_DEFAULT_ACC) << 52)
> -
> -#define PSW_ASC_PRIMARY 0x0000000000000000UL
> -#define PSW_ASC_ACCREG 0x0000400000000000UL
> -#define PSW_ASC_SECONDARY 0x0000800000000000UL
> -#define PSW_ASC_HOME 0x0000C00000000000UL
> -
> -#endif /* __s390x__ */
> -
> -
> -/*
> - * The s390_regs structure is used to define the elf_gregset_t.
> - */
> -typedef struct {
> - psw_t psw;
> - unsigned long gprs[NUM_GPRS];
> - unsigned int acrs[NUM_ACRS];
> - unsigned long orig_gpr2;
> -} s390_regs;
> -
> -/*
> - * The user_pt_regs structure exports the beginning of
> - * the in-kernel pt_regs structure to user space.
> - */
> -typedef struct {
> - unsigned long args[1];
> - psw_t psw;
> - unsigned long gprs[NUM_GPRS];
> -} user_pt_regs;
> -
> -/*
> - * Now for the user space program event recording (trace) definitions.
> - * The following structures are used only for the ptrace interface, don't
> - * touch or even look at it if you don't want to modify the user-space
> - * ptrace interface. In particular stay away from it for in-kernel PER.
> - */
> -typedef struct {
> - unsigned long cr[NUM_CR_WORDS];
> -} per_cr_words;
> -
> -#define PER_EM_MASK 0xE8000000UL
> -
> -typedef struct {
> -#ifdef __s390x__
> - unsigned : 32;
> -#endif /* __s390x__ */
> - unsigned em_branching : 1;
> - unsigned em_instruction_fetch : 1;
> - /*
> - * Switching on storage alteration automatically fixes
> - * the storage alteration event bit in the users std.
> - */
> - unsigned em_storage_alteration : 1;
> - unsigned em_gpr_alt_unused : 1;
> - unsigned em_store_real_address : 1;
> - unsigned : 3;
> - unsigned branch_addr_ctl : 1;
> - unsigned : 1;
> - unsigned storage_alt_space_ctl : 1;
> - unsigned : 21;
> - unsigned long starting_addr;
> - unsigned long ending_addr;
> -} per_cr_bits;
> -
> -typedef struct {
> - unsigned short perc_atmid;
> - unsigned long address;
> - unsigned char access_id;
> -} per_lowcore_words;
> -
> -typedef struct {
> - unsigned perc_branching : 1;
> - unsigned perc_instruction_fetch : 1;
> - unsigned perc_storage_alteration : 1;
> - unsigned perc_gpr_alt_unused : 1;
> - unsigned perc_store_real_address : 1;
> - unsigned : 3;
> - unsigned atmid_psw_bit_31 : 1;
> - unsigned atmid_validity_bit : 1;
> - unsigned atmid_psw_bit_32 : 1;
> - unsigned atmid_psw_bit_5 : 1;
> - unsigned atmid_psw_bit_16 : 1;
> - unsigned atmid_psw_bit_17 : 1;
> - unsigned si : 2;
> - unsigned long address;
> - unsigned : 4;
> - unsigned access_id : 4;
> -} per_lowcore_bits;
> -
> -typedef struct {
> - union {
> - per_cr_words words;
> - per_cr_bits bits;
> - } control_regs;
> - /*
> - * The single_step and instruction_fetch bits are obsolete,
> - * the kernel always sets them to zero. To enable single
> - * stepping use ptrace(PTRACE_SINGLESTEP) instead.
> - */
> - unsigned single_step : 1;
> - unsigned instruction_fetch : 1;
> - unsigned : 30;
> - /*
> - * These addresses are copied into cr10 & cr11 if single
> - * stepping is switched off
> - */
> - unsigned long starting_addr;
> - unsigned long ending_addr;
> - union {
> - per_lowcore_words words;
> - per_lowcore_bits bits;
> - } lowcore;
> -} per_struct;
> -
> -typedef struct {
> - unsigned int len;
> - unsigned long kernel_addr;
> - unsigned long process_addr;
> -} ptrace_area;
> -
> -/*
> - * S/390 specific non posix ptrace requests. I chose unusual values so
> - * they are unlikely to clash with future ptrace definitions.
> - */
> -#define PTRACE_PEEKUSR_AREA 0x5000
> -#define PTRACE_POKEUSR_AREA 0x5001
> -#define PTRACE_PEEKTEXT_AREA 0x5002
> -#define PTRACE_PEEKDATA_AREA 0x5003
> -#define PTRACE_POKETEXT_AREA 0x5004
> -#define PTRACE_POKEDATA_AREA 0x5005
> -#define PTRACE_GET_LAST_BREAK 0x5006
> -#define PTRACE_PEEK_SYSTEM_CALL 0x5007
> -#define PTRACE_POKE_SYSTEM_CALL 0x5008
> -#define PTRACE_ENABLE_TE 0x5009
> -#define PTRACE_DISABLE_TE 0x5010
> -#define PTRACE_TE_ABORT_RAND 0x5011
> -
> -/*
> - * The numbers chosen here are somewhat arbitrary but absolutely MUST
> - * not overlap with any of the number assigned in <linux/ptrace.h>.
> - */
> -#define PTRACE_SINGLEBLOCK 12 /* resume execution until next branch */
> -
> -/*
> - * PT_PROT definition is loosely based on hppa bsd definition in
> - * gdb/hppab-nat.c
> - */
> -#define PTRACE_PROT 21
> -
> -typedef enum {
> - ptprot_set_access_watchpoint,
> - ptprot_set_write_watchpoint,
> - ptprot_disable_watchpoint
> -} ptprot_flags;
> -
> -typedef struct {
> - unsigned long lowaddr;
> - unsigned long hiaddr;
> - ptprot_flags prot;
> -} ptprot_area;
> -
> -/* Sequence of bytes for breakpoint illegal instruction. */
> -#define S390_BREAKPOINT {0x0,0x1}
> -#define S390_BREAKPOINT_U16 ((__u16)0x0001)
> -#define S390_SYSCALL_OPCODE ((__u16)0x0a00)
> -#define S390_SYSCALL_SIZE 2
> -
> -/*
> - * The user_regs_struct defines the way the user registers are
> - * store on the stack for signal handling.
> - */
> -struct user_regs_struct {
> - psw_t psw;
> - unsigned long gprs[NUM_GPRS];
> - unsigned int acrs[NUM_ACRS];
> - unsigned long orig_gpr2;
> - s390_fp_regs fp_regs;
> - /*
> - * These per registers are in here so that gdb can modify them
> - * itself as there is no "official" ptrace interface for hardware
> - * watchpoints. This is the way intel does it.
> - */
> - per_struct per_info;
> - unsigned long ieee_instruction_pointer; /* obsolete, always 0 */
> -};
> -
> -#endif /* __ASSEMBLY__ */
> -
> -#endif /* _UAPI_S390_PTRACE_H */
> --
> 2.1.0
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