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gem5/src/arch/riscv/linux/linux.hh
Leon 652a72d122 arch-riscv: Add support for riscv hardware probing syscall (#1525) 
This PR adds the support for riscv hardware probing syscall described in
[this](https://docs.kernel.org/arch/riscv/hwprobe.html). The
implementation logic refers to [linux
kernel](https://github.com/torvalds/linux/blob/master/arch/riscv/kernel/sys_hwprobe.c)
and
[qemu](https://github.com/qemu/qemu/blob/master/linux-user/syscall.c).
And passed the [RISC-V hwprobe
exmaple](https://github.com/cyyself/hwprobe) test.

Hope to be merged. Thanks.

Change-Id: Iab714974f0551fc451e0d6846c75a7153809a308

Co-authored-by: Zhibo Hong <hongzhibo@bytedance.com>
2024-10-14 10:00:48 -07:00

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/*
* Copyright (c) 2006 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __ARCH_RISCV_LINUX_LINUX_HH__
#define __ARCH_RISCV_LINUX_LINUX_HH__
#include <map>
#include "arch/riscv/utility.hh"
#include "kern/linux/flag_tables.hh"
#include "kern/linux/linux.hh"
#include "base/bitfield.hh"
namespace gem5
{
class RiscvLinux : public Linux
{
public:
static const ByteOrder byteOrder = ByteOrder::little;
enum RiscvHwprobeKey
{
Mvendorid,
Marchid,
Mimpid,
BaseBehavior,
IMAExt0,
Cpuperf0,
ZicbozBlockSize,
HighestVirtAddress,
TimeCsrFreq,
MisalignedScalarPerf
};
/* Increase RISCV_HWPROBE_MAX_KEY when adding items. */
#define RISCV_HWPROBE_MAX_KEY 9
BitUnion64(key_base_behavior_t)
Bitfield<0> ima;
EndBitUnion(key_base_behavior_t)
BitUnion64(key_ima_ext_0_t)
Bitfield<49> ZAWRS;
Bitfield<48> ZCMOP;
Bitfield<47> ZCF;
Bitfield<46> ZCD;
Bitfield<45> ZCB;
Bitfield<44> ZCA;
Bitfield<43> ZIMOP;
Bitfield<42> ZVE64D;
Bitfield<41> ZVE64F;
Bitfield<40> ZVE64X;
Bitfield<39> ZVE32F;
Bitfield<38> ZVE32X;
Bitfield<37> ZIHINTPAUSE;
Bitfield<36> ZICOND;
Bitfield<35> ZACAS;
Bitfield<34> ZTSO;
Bitfield<33> ZFA;
Bitfield<32> ZVFHMIN;
Bitfield<31> ZVFH;
Bitfield<30> ZIHINTNTL;
Bitfield<29> ZFHMIN;
Bitfield<28> ZFH;
Bitfield<27> ZVKT;
Bitfield<26> ZVKSH;
Bitfield<25> ZVKSED;
Bitfield<24> ZVKNHB;
Bitfield<22> ZVKNHA;
Bitfield<21> ZVKNED;
Bitfield<20> ZVKG;
Bitfield<19> ZVKB;
Bitfield<18> ZVBC;
Bitfield<17> ZVBB;
Bitfield<16> ZKT;
Bitfield<15> ZKSH;
Bitfield<14> ZKSED;
Bitfield<13> ZKNH;
Bitfield<12> ZKNE;
Bitfield<11> ZKND;
Bitfield<10> ZBKX;
Bitfield<9> ZBKC;
Bitfield<8> ZBKB;
Bitfield<7> ZBC;
Bitfield<6> ZICBOZ;
Bitfield<5> ZBS;
Bitfield<4> ZBB;
Bitfield<3> ZBA;
Bitfield<2> V;
Bitfield<1> C;
Bitfield<0> FD;
EndBitUnion(key_ima_ext_0_t)
enum MisalignedScalarPerf
{
Unknown,
Emulated,
Slow,
Fast,
Unsupported
};
/* Flags */
#define RISCV_HWPROBE_WHICH_CPUS (1 << 0)
struct riscv_hwprobe {
int64_t key;
uint64_t value;
};
typedef struct cpumask {
size_t size;
uint64_t bits[];
} cpumask_t;
};
class RiscvLinux64 : public RiscvLinux, public OpenFlagTable<RiscvLinux64>
{
public:
static const int TGT_SIGHUP = 1;
static const int TGT_SIGINT = 2;
static const int TGT_SIGQUIT = 3;
static const int TGT_SIGILL = 4;
static const int TGT_SIGTRAP = 5;
static const int TGT_SIGABRT = 6;
static const int TGT_SIGIOT = 6;
static const int TGT_SIGEMT = 7;
static const int TGT_SIGFPE = 8;
static const int TGT_SIGKILL = 9;
static const int TGT_SIGBUS = 10;
static const int TGT_SIGSEGV = 11;
static const int TGT_SIGSYS = 12;
static const int TGT_SIGPIPE = 13;
static const int TGT_SIGALRM = 14;
static const int TGT_SIGTERM = 15;
static const int TGT_SIGURG = 16;
static const int TGT_SIGSTOP = 17;
static const int TGT_SIGTSTP = 18;
static const int TGT_SIGCONT = 19;
static const int TGT_SIGCHLD = 20;
static const int TGT_SIGCLD = 20;
static const int TGT_SIGTTIN = 21;
static const int TGT_SIGTTOU = 22;
static const int TGT_SIGPOLL = 23;
static const int TGT_SIGIO = 23;
static const int TGT_SIGXCPU = 24;
static const int TGT_SIGXFSZ = 25;
static const int TGT_SIGVTALRM = 26;
static const int TGT_SIGPROF = 27;
static const int TGT_SIGWINCH = 28;
static const int TGT_SIGLOST = 29;
static const int TGT_SIGPWR = 29;
static const int TGT_SIGUSR1 = 30;
static const int TGT_SIGUSR2 = 31;
//@{
/// open(2) flag values.
static constexpr int TGT_O_RDONLY = 0x000000; //!< O_RDONLY
static constexpr int TGT_O_WRONLY = 0x000001; //!< O_WRONLY
static constexpr int TGT_O_RDWR = 0x000002; //!< O_RDWR
static constexpr int TGT_O_CREAT = 0x000040; //!< O_CREAT
static constexpr int TGT_O_EXCL = 0x000080; //!< O_EXCL
static constexpr int TGT_O_NOCTTY = 0x000100; //!< O_NOCTTY
static constexpr int TGT_O_TRUNC = 0x000200; //!< O_TRUNC
static constexpr int TGT_O_APPEND = 0x000400; //!< O_APPEND
static constexpr int TGT_O_NONBLOCK = 0x000800; //!< O_NONBLOCK
static constexpr int TGT_O_SYNC = 0x101000; //!< O_SYNC
static constexpr int TGT_FSYNC = 0x001000; //!< FSYNC
static constexpr int TGT_FASYNC = 0x002000; //!< FASYNC
// The following are not present in riscv64-unknown-elf <fcntl.h>
static constexpr int TGT_O_DSYNC = 0x001000; //!< O_DSYNC
static constexpr int TGT_O_CLOEXEC = 0x080000; //!< O_CLOEXEC
static constexpr int TGT_O_NOINHERIT = 0x040000; //!< O_NOINHERIT
static constexpr int TGT_O_DIRECT = 0x004000; //!< O_DIRECT
static constexpr int TGT_O_NOFOLLOW = 0x020000; //!< O_NOFOLLOW
static constexpr int TGT_O_DIRECTORY = 0x010000; //!< O_DIRECTORY
// The following are not defined by riscv64-unknown-elf
static constexpr int TGT_O_LARGEFILE = 0x000000; //!< O_LARGEFILE
static constexpr int TGT_O_NOATIME = 0x040000; //!< O_NOATIME
static constexpr int TGT_O_PATH = 0x200000; //!< O_PATH
//@}
// Only defined in riscv-unknown-elf for proxy kernel and not linux kernel
static constexpr unsigned TGT_MAP_SHARED = 0x0001;
static constexpr unsigned TGT_MAP_PRIVATE = 0x0002;
static constexpr unsigned TGT_MAP_FIXED = 0x0010;
static constexpr unsigned TGT_MAP_ANONYMOUS = 0x0020;
static constexpr unsigned TGT_MAP_POPULATE = 0x1000;
static constexpr unsigned TGT_MREMAP_FIXED = 0x0020;
typedef int64_t time_t;
typedef uint64_t dev_t;
typedef uint64_t ino_t;
typedef uint32_t mode_t;
typedef uint32_t nlink_t;
typedef uint32_t uid_t;
typedef uint32_t gid_t;
typedef int64_t off_t;
typedef uint64_t blksize_t;
typedef uint64_t blkcnt_t;
struct timespec
{
time_t tv_sec;
int64_t tv_nsec;
};
struct tgt_stat64
{
dev_t st_dev;
ino_t st_ino;
mode_t st_mode;
nlink_t st_nlink;
uid_t st_uid;
gid_t st_gid;
dev_t st_rdev;
dev_t __pad1;
off_t st_size;
blksize_t st_blksize;
blkcnt_t st_blocks;
uint64_t st_atimeX;
uint64_t st_atime_nsec;
uint64_t st_mtimeX;
uint64_t st_mtime_nsec;
uint64_t st_ctimeX;
uint64_t st_ctime_nsec;
int32_t ___glibc_reserved[2];
};
struct tgt_fsid_t
{
int32_t val[2];
};
struct tgt_statfs
{
uint64_t f_type;
uint64_t f_bsize;
uint64_t f_blocks;
uint64_t f_bfree;
uint64_t f_bavail;
uint64_t f_files;
uint64_t f_ffree;
tgt_fsid_t f_fsid;
uint64_t f_namelen;
uint64_t f_frsize;
uint64_t f_flags;
uint64_t f_spare[4];
};
struct tgt_sysinfo
{
int64_t uptime;
uint64_t loads[3];
uint64_t totalram;
uint64_t freeram;
uint64_t sharedram;
uint64_t bufferram;
uint64_t totalswap;
uint64_t freeswap;
uint16_t procs;
uint16_t pad;
uint64_t totalhigh;
uint64_t freehigh;
uint32_t mem_unit;
};
struct tgt_clone_args
{
uint64_t flags;
uint64_t pidfd;
uint64_t child_tid;
uint64_t parent_tid;
uint64_t exit_signal;
uint64_t stack;
uint64_t stack_size;
uint64_t tls;
uint64_t set_tid;
uint64_t set_tid_size;
uint64_t cgroup;
};
static void
archClone(uint64_t flags,
Process *pp, Process *cp,
ThreadContext *ptc, ThreadContext *ctc,
uint64_t stack, uint64_t tls)
{
ctc->getIsaPtr()->copyRegsFrom(ptc);
if (flags & TGT_CLONE_SETTLS)
ctc->setReg(RiscvISA::ThreadPointerReg, tls);
if (stack)
ctc->setReg(RiscvISA::StackPointerReg, stack);
}
};
class RiscvLinux32 : public RiscvLinux, public OpenFlagTable<RiscvLinux32>
{
public:
static const int TGT_SIGHUP = 1;
static const int TGT_SIGINT = 2;
static const int TGT_SIGQUIT = 3;
static const int TGT_SIGILL = 4;
static const int TGT_SIGTRAP = 5;
static const int TGT_SIGABRT = 6;
static const int TGT_SIGIOT = 6;
static const int TGT_SIGEMT = 7;
static const int TGT_SIGFPE = 8;
static const int TGT_SIGKILL = 9;
static const int TGT_SIGBUS = 10;
static const int TGT_SIGSEGV = 11;
static const int TGT_SIGSYS = 12;
static const int TGT_SIGPIPE = 13;
static const int TGT_SIGALRM = 14;
static const int TGT_SIGTERM = 15;
static const int TGT_SIGURG = 16;
static const int TGT_SIGSTOP = 17;
static const int TGT_SIGTSTP = 18;
static const int TGT_SIGCONT = 19;
static const int TGT_SIGCHLD = 20;
static const int TGT_SIGCLD = 20;
static const int TGT_SIGTTIN = 21;
static const int TGT_SIGTTOU = 22;
static const int TGT_SIGPOLL = 23;
static const int TGT_SIGIO = 23;
static const int TGT_SIGXCPU = 24;
static const int TGT_SIGXFSZ = 25;
static const int TGT_SIGVTALRM = 26;
static const int TGT_SIGPROF = 27;
static const int TGT_SIGWINCH = 28;
static const int TGT_SIGLOST = 29;
static const int TGT_SIGPWR = 29;
static const int TGT_SIGUSR1 = 30;
static const int TGT_SIGUSR2 = 31;
//@{
/// open(2) flag values.
// The following values match newlib 3.0.0.
// Note that glibc has different values.
static constexpr int TGT_O_RDONLY = 0x000000; //!< O_RDONLY
static constexpr int TGT_O_WRONLY = 0x000001; //!< O_WRONLY
static constexpr int TGT_O_RDWR = 0x000002; //!< O_RDWR
static constexpr int TGT_O_CREAT = 0x000200; //!< O_CREAT
static constexpr int TGT_O_EXCL = 0x000800; //!< O_EXCL
static constexpr int TGT_O_NOCTTY = 0x008000; //!< O_NOCTTY
static constexpr int TGT_O_TRUNC = 0x000400; //!< O_TRUNC
static constexpr int TGT_O_APPEND = 0x000008; //!< O_APPEND
static constexpr int TGT_O_NONBLOCK = 0x004000; //!< O_NONBLOCK
static constexpr int TGT_O_SYNC = 0x002000; //!< O_SYNC
static constexpr int TGT_FSYNC = 0x002000; //!< FSYNC
static constexpr int TGT_FASYNC = 0x000040; //!< FASYNC
// The following are not present in riscv32-unknown-elf <fcntl.h>
static constexpr int TGT_O_DSYNC = 0x010000; //!< O_DSYNC
static constexpr int TGT_O_CLOEXEC = 0x040000; //!< O_CLOEXEC
static constexpr int TGT_O_NOINHERIT = 0x040000; //!< O_NOINHERIT
static constexpr int TGT_O_DIRECT = 0x080000; //!< O_DIRECT
static constexpr int TGT_O_NOFOLLOW = 0x100000; //!< O_NOFOLLOW
static constexpr int TGT_O_DIRECTORY = 0x200000; //!< O_DIRECTORY
// The following are not defined by riscv32-unknown-elf
static constexpr int TGT_O_LARGEFILE = 0x020000; //!< O_LARGEFILE
static constexpr int TGT_O_NOATIME = 0x800000; //!< O_NOATIME
static constexpr int TGT_O_PATH = 0x400000; //!< O_PATH
//@}
// Only defined in riscv-unknown-elf for proxy kernel and not linux kernel
static constexpr unsigned TGT_MAP_SHARED = 0x0001;
static constexpr unsigned TGT_MAP_PRIVATE = 0x0002;
static constexpr unsigned TGT_MAP_FIXED = 0x0010;
static constexpr unsigned TGT_MAP_ANONYMOUS = 0x0020;
static constexpr unsigned TGT_MAP_POPULATE = 0x1000;
static constexpr unsigned TGT_MREMAP_FIXED = 0x0020;
// Newlib 3.0.0 defaults to 64-bits for time_t.
// Currently time_t in glibc for riscv32 is 32-bits, but will be changed.
typedef int64_t time_t;
// Linux types for RV32
typedef uint32_t size_t;
typedef int64_t off_t;
/// Limit struct for getrlimit/setrlimit.
struct rlimit
{
uint32_t rlim_cur; //!< soft limit
uint32_t rlim_max; //!< hard limit
};
struct timespec
{
time_t tv_sec;
int32_t tv_nsec;
};
struct tgt_fsid_t
{
int32_t val[2];
};
struct tgt_stat
{
uint64_t st_dev;
uint64_t st_ino;
uint32_t st_mode;
uint32_t st_nlink;
uint32_t st_uid;
uint32_t st_gid;
uint64_t st_rdev;
uint64_t __pad1;
int64_t st_size;
int32_t st_blksize;
int32_t __pad2;
int64_t st_blocks;
time_t st_atimeX;
int32_t st_atime_nsec;
time_t st_mtimeX;
int32_t st_mtime_nsec;
time_t st_ctimeX;
int32_t st_ctime_nsec;
int32_t __unused4;
int32_t __unused5;
};
struct tgt_statfs
{
uint32_t f_type;
uint32_t f_bsize;
uint32_t f_blocks;
uint32_t f_bfree;
uint32_t f_bavail;
uint32_t f_files;
uint32_t f_ffree;
tgt_fsid_t f_fsid;
uint32_t f_namelen;
uint32_t f_frsize;
uint32_t f_flags;
uint32_t f_spare[4];
};
struct tgt_sysinfo
{
int32_t uptime;
uint32_t loads[3];
uint32_t totalram;
uint32_t freeram;
uint32_t sharedram;
uint32_t bufferram;
uint32_t totalswap;
uint32_t freeswap;
uint16_t procs;
uint16_t pad;
uint32_t totalhigh;
uint32_t freehigh;
uint32_t mem_unit;
};
static void
archClone(uint64_t flags,
Process *pp, Process *cp,
ThreadContext *ptc, ThreadContext *ctc,
uint64_t stack, uint64_t tls)
{
ctc->getIsaPtr()->copyRegsFrom(ptc);
if (flags & TGT_CLONE_SETTLS)
ctc->setReg(RiscvISA::ThreadPointerReg, sext<32>(tls));
if (stack)
ctc->setReg(RiscvISA::StackPointerReg, sext<32>(stack));
}
};
} // namespace gem5
#endif
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