[PULL 00/23] loongarch64 patch queue

[PULL 00/23] loongarch64 patch queue

[Richard Henderson]

The following changes since commit e8e86b484eac70cd86e15fa10a2f0038a536cbba:

  Merge tag 'pull-riscv-to-apply-20220703-1' of github.com:alistair23/qemu into staging (2022-07-03 06:29:02 +0530)

are available in the Git repository at:

  https://gitlab.com/rth7680/qemu.git tags/pull-la-20220704

for you to fetch changes up to eb1e9ff8bba91674b4321f2b075c55aa8d9948cc:

  target/loongarch: Add lock when writing timer clear reg (2022-07-04 11:08:58 +0530)

----------------------------------------------------------------
LoongArch patch queue:
  Support linux-user.
  Fixes for CSR BADV.
  Fix ASRT{LE,GT} exception.
  Fixes for LS7A RTC.
  Fix for interrupt vector spacing.

----------------------------------------------------------------
Mao Bibo (1):
      hw/intc/loongarch_pch_msi: Fix msi vector convertion

Song Gao (13):
      linux-user: Add LoongArch generic header files
      linux-user: Add LoongArch signal support
      linux-user: Add LoongArch elf support
      linux-user: Add LoongArch syscall support
      linux-user: Add LoongArch cpu_loop support
      scripts: add loongarch64 binfmt config
      target/loongarch: remove badaddr from CPULoongArch
      target/loongarch: Fix missing update CSR_BADV
      target/loongarch: Fix helper_asrtle_d/asrtgt_d raise wrong exception
      target/loongarch: remove unused include hw/loader.h
      target/loongarch: Adjust functions and structure to support user-mode
      default-configs: Add loongarch linux-user support
      target/loongarch: Update README

Xiaojuan Yang (9):
      hw/rtc/ls7a_rtc: Fix uninitialied bugs and toymatch writing function
      hw/rtc/ls7a_rtc: Fix timer call back function
      hw/rtc/ls7a_rtc: Remove unimplemented device in realized function
      hw/rtc/ls7a_rtc: Add reset function
      hw/rtc/ls7a_rtc: Fix rtc enable and disable function
      hw/rtc/ls7a_rtc: Use tm struct pointer as arguments in toy_time_to_val()
      hw/rtc/ls7a_rtc: Fix 'calculate' spelling errors
      target/loongarch: Fix the meaning of ECFG reg's VS field
      target/loongarch: Add lock when writing timer clear reg

 configs/targets/loongarch64-linux-user.mak         |   3 +
 include/hw/intc/loongarch_pch_msi.h                |   2 +
 linux-user/loongarch64/sockbits.h                  |  11 +
 linux-user/loongarch64/syscall_nr.h                | 312 +++++++++++++++++++
 linux-user/loongarch64/target_cpu.h                |  34 +++
 linux-user/loongarch64/target_elf.h                |  12 +
 linux-user/loongarch64/target_errno_defs.h         |  12 +
 linux-user/loongarch64/target_fcntl.h              |  11 +
 linux-user/loongarch64/target_prctl.h              |   1 +
 linux-user/loongarch64/target_resource.h           |  11 +
 linux-user/loongarch64/target_signal.h             |  13 +
 linux-user/loongarch64/target_structs.h            |  11 +
 linux-user/loongarch64/target_syscall.h            |  48 +++
 linux-user/loongarch64/termbits.h                  |  11 +
 linux-user/syscall_defs.h                          |   6 +-
 target/loongarch/cpu.h                             |   8 +-
 target/loongarch/helper.h                          |   2 +
 target/loongarch/internals.h                       |   2 +
 hw/intc/loongarch_pch_msi.c                        |  22 +-
 hw/loongarch/loongson3.c                           |   1 +
 hw/rtc/ls7a_rtc.c                                  | 131 ++++----
 linux-user/elfload.c                               |  91 ++++++
 linux-user/loongarch64/cpu_loop.c                  |  96 ++++++
 linux-user/loongarch64/signal.c                    | 335 +++++++++++++++++++++
 target/loongarch/cpu.c                             |  38 ++-
 target/loongarch/csr_helper.c                      |   2 +
 target/loongarch/gdbstub.c                         |   2 +-
 target/loongarch/op_helper.c                       |  10 +-
 target/loongarch/insn_trans/trans_privileged.c.inc |  36 +++
 scripts/gensyscalls.sh                             |   2 +
 scripts/qemu-binfmt-conf.sh                        |   6 +-
 target/loongarch/README                            |  39 ++-
 32 files changed, 1226 insertions(+), 95 deletions(-)
 create mode 100644 configs/targets/loongarch64-linux-user.mak
 create mode 100644 linux-user/loongarch64/sockbits.h
 create mode 100644 linux-user/loongarch64/syscall_nr.h
 create mode 100644 linux-user/loongarch64/target_cpu.h
 create mode 100644 linux-user/loongarch64/target_elf.h
 create mode 100644 linux-user/loongarch64/target_errno_defs.h
 create mode 100644 linux-user/loongarch64/target_fcntl.h
 create mode 100644 linux-user/loongarch64/target_prctl.h
 create mode 100644 linux-user/loongarch64/target_resource.h
 create mode 100644 linux-user/loongarch64/target_signal.h
 create mode 100644 linux-user/loongarch64/target_structs.h
 create mode 100644 linux-user/loongarch64/target_syscall.h
 create mode 100644 linux-user/loongarch64/termbits.h
 create mode 100644 linux-user/loongarch64/cpu_loop.c
 create mode 100644 linux-user/loongarch64/signal.c

[PULL 01/23] linux-user: Add LoongArch generic header files

[Richard Henderson]

From: Song Gao <gaosong@loongson.cn>

This includes:
- sockbits.h
- target_errno_defs.h
- target_fcntl.h
- termbits.h
- target_resource.h
- target_structs.h

Signed-off-by: Song Gao <gaosong@loongson.cn>
Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: WANG Xuerui <git@xen0n.name>
Message-Id: <20220624031049.1716097-2-gaosong@loongson.cn>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 linux-user/loongarch64/sockbits.h          | 11 +++++++++++
 linux-user/loongarch64/target_errno_defs.h | 12 ++++++++++++
 linux-user/loongarch64/target_fcntl.h      | 11 +++++++++++
 linux-user/loongarch64/target_prctl.h      |  1 +
 linux-user/loongarch64/target_resource.h   | 11 +++++++++++
 linux-user/loongarch64/target_structs.h    | 11 +++++++++++
 linux-user/loongarch64/termbits.h          | 11 +++++++++++
 7 files changed, 68 insertions(+)
 create mode 100644 linux-user/loongarch64/sockbits.h
 create mode 100644 linux-user/loongarch64/target_errno_defs.h
 create mode 100644 linux-user/loongarch64/target_fcntl.h
 create mode 100644 linux-user/loongarch64/target_prctl.h
 create mode 100644 linux-user/loongarch64/target_resource.h
 create mode 100644 linux-user/loongarch64/target_structs.h
 create mode 100644 linux-user/loongarch64/termbits.h

diff --git a/linux-user/loongarch64/sockbits.h b/linux-user/loongarch64/sockbits.h
new file mode 100644
index 0000000000..1cffcae120
--- /dev/null
+++ b/linux-user/loongarch64/sockbits.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (c) 2021 Loongson Technology Corporation Limited
+ */
+
+#ifndef LOONGARCH_TARGET_SOCKBITS_H
+#define LOONGARCH_TARGET_SOCKBITS_H
+
+#include "../generic/sockbits.h"
+
+#endif
diff --git a/linux-user/loongarch64/target_errno_defs.h b/linux-user/loongarch64/target_errno_defs.h
new file mode 100644
index 0000000000..c198b8aca9
--- /dev/null
+++ b/linux-user/loongarch64/target_errno_defs.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (c) 2021 Loongson Technology Corporation Limited
+ */
+
+#ifndef LOONGARCH_TARGET_ERRNO_DEFS_H
+#define LOONGARCH_TARGET_ERRNO_DEFS_H
+
+/* Target uses generic errno */
+#include "../generic/target_errno_defs.h"
+
+#endif
diff --git a/linux-user/loongarch64/target_fcntl.h b/linux-user/loongarch64/target_fcntl.h
new file mode 100644
index 0000000000..99bf586854
--- /dev/null
+++ b/linux-user/loongarch64/target_fcntl.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (c) 2021 Loongson Technology Corporation Limited
+ */
+
+#ifndef LOONGARCH_TARGET_FCNTL_H
+#define LOONGARCH_TARGET_FCNTL_H
+
+#include "../generic/fcntl.h"
+
+#endif
diff --git a/linux-user/loongarch64/target_prctl.h b/linux-user/loongarch64/target_prctl.h
new file mode 100644
index 0000000000..eb53b31ad5
--- /dev/null
+++ b/linux-user/loongarch64/target_prctl.h
@@ -0,0 +1 @@
+/* No special prctl support required. */
diff --git a/linux-user/loongarch64/target_resource.h b/linux-user/loongarch64/target_resource.h
new file mode 100644
index 0000000000..0f86bf24ee
--- /dev/null
+++ b/linux-user/loongarch64/target_resource.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (c) 2021 Loongson Technology Corporation Limited
+ */
+
+#ifndef LOONGARCH_TARGET_RESOURCE_H
+#define LOONGARCH_TARGET_RESOURCE_H
+
+#include "../generic/target_resource.h"
+
+#endif
diff --git a/linux-user/loongarch64/target_structs.h b/linux-user/loongarch64/target_structs.h
new file mode 100644
index 0000000000..6041441e15
--- /dev/null
+++ b/linux-user/loongarch64/target_structs.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (c) 2021 Loongson Technology Corporation Limited
+ */
+
+#ifndef LOONGARCH_TARGET_STRUCTS_H
+#define LOONGARCH_TARGET_STRUCTS_H
+
+#include "../generic/target_structs.h"
+
+#endif
diff --git a/linux-user/loongarch64/termbits.h b/linux-user/loongarch64/termbits.h
new file mode 100644
index 0000000000..d425db8748
--- /dev/null
+++ b/linux-user/loongarch64/termbits.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (c) 2021 Loongson Technology Corporation Limited
+ */
+
+#ifndef LOONGARCH_TARGET_TERMBITS_H
+#define LOONGARCH_TARGET_TERMBITS_H
+
+#include "../generic/termbits.h"
+
+#endif
-- 
2.34.1

[PULL 02/23] linux-user: Add LoongArch signal support

[Richard Henderson]

From: Song Gao <gaosong@loongson.cn>

Signed-off-by: Song Gao <gaosong@loongson.cn>
Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn>
Message-Id: <20220624031049.1716097-3-gaosong@loongson.cn>
[rth: Rework extctx frame allocation and locking;
      Properly read/write fcc from signal frame.]
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 linux-user/loongarch64/target_signal.h |  13 +
 linux-user/loongarch64/signal.c        | 335 +++++++++++++++++++++++++
 2 files changed, 348 insertions(+)
 create mode 100644 linux-user/loongarch64/target_signal.h
 create mode 100644 linux-user/loongarch64/signal.c

diff --git a/linux-user/loongarch64/target_signal.h b/linux-user/loongarch64/target_signal.h
new file mode 100644
index 0000000000..ad3aaffcb4
--- /dev/null
+++ b/linux-user/loongarch64/target_signal.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (c) 2021 Loongson Technology Corporation Limited
+ */
+
+#ifndef LOONGARCH_TARGET_SIGNAL_H
+#define LOONGARCH_TARGET_SIGNAL_H
+
+#include "../generic/signal.h"
+
+#define TARGET_ARCH_HAS_SIGTRAMP_PAGE 1
+
+#endif /* LOONGARCH_TARGET_SIGNAL_H */
diff --git a/linux-user/loongarch64/signal.c b/linux-user/loongarch64/signal.c
new file mode 100644
index 0000000000..65fd5f3857
--- /dev/null
+++ b/linux-user/loongarch64/signal.c
@@ -0,0 +1,335 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * LoongArch emulation of Linux signals
+ *
+ * Copyright (c) 2021 Loongson Technology Corporation Limited
+ */
+
+#include "qemu/osdep.h"
+#include "qemu.h"
+#include "user-internals.h"
+#include "signal-common.h"
+#include "linux-user/trace.h"
+
+#include "target/loongarch/internals.h"
+
+/* FP context was used */
+#define SC_USED_FP              (1 << 0)
+
+struct target_sigcontext {
+    uint64_t sc_pc;
+    uint64_t sc_regs[32];
+    uint32_t sc_flags;
+    uint64_t sc_extcontext[0]   QEMU_ALIGNED(16);
+};
+
+
+#define FPU_CTX_MAGIC           0x46505501
+#define FPU_CTX_ALIGN           8
+struct target_fpu_context {
+    uint64_t regs[32];
+    uint64_t fcc;
+    uint32_t fcsr;
+} QEMU_ALIGNED(FPU_CTX_ALIGN);
+
+#define CONTEXT_INFO_ALIGN      16
+struct target_sctx_info {
+    uint32_t magic;
+    uint32_t size;
+    uint64_t padding;
+} QEMU_ALIGNED(CONTEXT_INFO_ALIGN);
+
+struct target_ucontext {
+    abi_ulong tuc_flags;
+    abi_ptr tuc_link;
+    target_stack_t tuc_stack;
+    target_sigset_t tuc_sigmask;
+    uint8_t __unused[1024 / 8 - sizeof(target_sigset_t)];
+    struct target_sigcontext tuc_mcontext;
+};
+
+struct target_rt_sigframe {
+    struct target_siginfo        rs_info;
+    struct target_ucontext       rs_uc;
+};
+
+/*
+ * These two structures are not present in guest memory, are private
+ * to the signal implementation, but are largely copied from the
+ * kernel's signal implementation.
+ */
+struct ctx_layout {
+    void *haddr;
+    abi_ptr gaddr;
+    unsigned int size;
+};
+
+struct extctx_layout {
+    unsigned int size;
+    unsigned int flags;
+    struct ctx_layout fpu;
+    struct ctx_layout end;
+};
+
+/* The kernel's sc_save_fcc macro is a sequence of MOVCF2GR+BSTRINS. */
+static uint64_t read_all_fcc(CPULoongArchState *env)
+{
+    uint64_t ret = 0;
+
+    for (int i = 0; i < 8; ++i) {
+        ret |= (uint64_t)env->cf[i] << (i * 8);
+    }
+
+    return ret;
+}
+
+/* The kernel's sc_restore_fcc macro is a sequence of BSTRPICK+MOVGR2CF. */
+static void write_all_fcc(CPULoongArchState *env, uint64_t val)
+{
+    for (int i = 0; i < 8; ++i) {
+        env->cf[i] = (val >> (i * 8)) & 1;
+    }
+}
+
+static abi_ptr extframe_alloc(struct extctx_layout *extctx,
+                              struct ctx_layout *sctx, unsigned size,
+                              unsigned align, abi_ptr orig_sp)
+{
+    abi_ptr sp = orig_sp;
+
+    sp -= sizeof(struct target_sctx_info) + size;
+    align = MAX(align, CONTEXT_INFO_ALIGN);
+    sp = ROUND_DOWN(sp, align);
+    sctx->gaddr = sp;
+
+    size = orig_sp - sp;
+    sctx->size = size;
+    extctx->size += size;
+
+    return sp;
+}
+
+static abi_ptr setup_extcontext(struct extctx_layout *extctx, abi_ptr sp)
+{
+    memset(extctx, 0, sizeof(struct extctx_layout));
+
+    /* Grow down, alloc "end" context info first. */
+    sp = extframe_alloc(extctx, &extctx->end, 0, CONTEXT_INFO_ALIGN, sp);
+
+    /* For qemu, there is no lazy fp context switch, so fp always present. */
+    extctx->flags = SC_USED_FP;
+    sp = extframe_alloc(extctx, &extctx->fpu,
+                        sizeof(struct target_rt_sigframe), FPU_CTX_ALIGN, sp);
+
+    return sp;
+}
+
+static void setup_sigframe(CPULoongArchState *env,
+                           struct target_sigcontext *sc,
+                           struct extctx_layout *extctx)
+{
+    struct target_sctx_info *info;
+    struct target_fpu_context *fpu_ctx;
+    int i;
+
+    __put_user(extctx->flags, &sc->sc_flags);
+    __put_user(env->pc, &sc->sc_pc);
+    __put_user(0, &sc->sc_regs[0]);
+    for (i = 1; i < 32; ++i) {
+        __put_user(env->gpr[i], &sc->sc_regs[i]);
+    }
+
+    /*
+     * Set fpu context
+     */
+    info = extctx->fpu.haddr;
+    __put_user(FPU_CTX_MAGIC, &info->magic);
+    __put_user(extctx->fpu.size, &info->size);
+
+    fpu_ctx = (struct target_fpu_context *)(info + 1);
+    for (i = 0; i < 32; ++i) {
+        __put_user(env->fpr[i], &fpu_ctx->regs[i]);
+    }
+    __put_user(read_all_fcc(env), &fpu_ctx->fcc);
+    __put_user(env->fcsr0, &fpu_ctx->fcsr);
+
+    /*
+     * Set end context
+     */
+    info = extctx->end.haddr;
+    __put_user(0, &info->magic);
+    __put_user(extctx->end.size, &info->size);
+}
+
+static bool parse_extcontext(struct extctx_layout *extctx, abi_ptr frame)
+{
+    memset(extctx, 0, sizeof(*extctx));
+
+    while (1) {
+        uint32_t magic, size;
+
+        if (get_user_u32(magic, frame) || get_user_u32(size, frame + 4)) {
+            return false;
+        }
+
+        switch (magic) {
+        case 0: /* END */
+            extctx->end.gaddr = frame;
+            extctx->end.size = size;
+            extctx->size += size;
+            return true;
+
+        case FPU_CTX_MAGIC:
+            if (size < (sizeof(struct target_sctx_info) +
+                        sizeof(struct target_fpu_context))) {
+                return false;
+            }
+            extctx->fpu.gaddr = frame;
+            extctx->fpu.size = size;
+            extctx->size += size;
+            break;
+        default:
+            return false;
+        }
+
+        frame += size;
+    }
+}
+
+static void restore_sigframe(CPULoongArchState *env,
+                             struct target_sigcontext *sc,
+                             struct extctx_layout *extctx)
+{
+    int i;
+
+    __get_user(env->pc, &sc->sc_pc);
+    for (i = 1; i < 32; ++i) {
+        __get_user(env->gpr[i], &sc->sc_regs[i]);
+    }
+
+    if (extctx->fpu.haddr) {
+        struct target_fpu_context *fpu_ctx =
+            extctx->fpu.haddr + sizeof(struct target_sctx_info);
+        uint64_t fcc;
+
+        for (i = 0; i < 32; ++i) {
+            __get_user(env->fpr[i], &fpu_ctx->regs[i]);
+        }
+        __get_user(fcc, &fpu_ctx->fcc);
+        write_all_fcc(env, fcc);
+        __get_user(env->fcsr0, &fpu_ctx->fcsr);
+        restore_fp_status(env);
+    }
+}
+
+/*
+ * Determine which stack to use.
+ */
+static abi_ptr get_sigframe(struct target_sigaction *ka,
+                            CPULoongArchState *env,
+                            struct extctx_layout *extctx)
+{
+    abi_ulong sp;
+
+    sp = target_sigsp(get_sp_from_cpustate(env), ka);
+    sp = ROUND_DOWN(sp, 16);
+    sp = setup_extcontext(extctx, sp);
+    sp -= sizeof(struct target_rt_sigframe);
+
+    assert(QEMU_IS_ALIGNED(sp, 16));
+
+    return sp;
+}
+
+void setup_rt_frame(int sig, struct target_sigaction *ka,
+                    target_siginfo_t *info,
+                    target_sigset_t *set, CPULoongArchState *env)
+{
+    struct target_rt_sigframe *frame;
+    struct extctx_layout extctx;
+    abi_ptr frame_addr;
+    int i;
+
+    frame_addr = get_sigframe(ka, env, &extctx);
+    trace_user_setup_rt_frame(env, frame_addr);
+
+    frame = lock_user(VERIFY_WRITE, frame_addr,
+                      sizeof(*frame) + extctx.size, 0);
+    if (!frame) {
+        force_sigsegv(sig);
+        return;
+    }
+    extctx.fpu.haddr = (void *)frame + (extctx.fpu.gaddr - frame_addr);
+    extctx.end.haddr = (void *)frame + (extctx.end.gaddr - frame_addr);
+
+    tswap_siginfo(&frame->rs_info, info);
+
+    __put_user(0, &frame->rs_uc.tuc_flags);
+    __put_user(0, &frame->rs_uc.tuc_link);
+    target_save_altstack(&frame->rs_uc.tuc_stack, env);
+
+    setup_sigframe(env, &frame->rs_uc.tuc_mcontext, &extctx);
+
+    for (i = 0; i < TARGET_NSIG_WORDS; i++) {
+        __put_user(set->sig[i], &frame->rs_uc.tuc_sigmask.sig[i]);
+    }
+
+    env->gpr[4] = sig;
+    env->gpr[5] = frame_addr + offsetof(struct target_rt_sigframe, rs_info);
+    env->gpr[6] = frame_addr + offsetof(struct target_rt_sigframe, rs_uc);
+    env->gpr[3] = frame_addr;
+    env->gpr[1] = default_rt_sigreturn;
+
+    env->pc = ka->_sa_handler;
+    unlock_user(frame, frame_addr, sizeof(*frame) + extctx.size);
+}
+
+long do_rt_sigreturn(CPULoongArchState *env)
+{
+    struct target_rt_sigframe *frame;
+    struct extctx_layout extctx;
+    abi_ulong frame_addr;
+    sigset_t blocked;
+
+    frame_addr = env->gpr[3];
+    trace_user_do_rt_sigreturn(env, frame_addr);
+
+    if (!parse_extcontext(&extctx, frame_addr + sizeof(*frame))) {
+        goto badframe;
+    }
+
+    frame = lock_user(VERIFY_READ, frame_addr,
+                      sizeof(*frame) + extctx.size, 1);
+    if (!frame) {
+        goto badframe;
+    }
+    if (extctx.fpu.gaddr) {
+        extctx.fpu.haddr = (void *)frame + (extctx.fpu.gaddr - frame_addr);
+    }
+
+    target_to_host_sigset(&blocked, &frame->rs_uc.tuc_sigmask);
+    set_sigmask(&blocked);
+
+    restore_sigframe(env, &frame->rs_uc.tuc_mcontext, &extctx);
+
+    target_restore_altstack(&frame->rs_uc.tuc_stack, env);
+
+    unlock_user(frame, frame_addr, 0);
+    return -QEMU_ESIGRETURN;
+
+ badframe:
+    force_sig(TARGET_SIGSEGV);
+    return -QEMU_ESIGRETURN;
+}
+
+void setup_sigtramp(abi_ulong sigtramp_page)
+{
+    uint32_t *tramp = lock_user(VERIFY_WRITE, sigtramp_page, 8, 0);
+    assert(tramp != NULL);
+
+    __put_user(0x03822c0b, tramp + 0);  /* ori     a7, zero, 0x8b */
+    __put_user(0x002b0000, tramp + 1);  /* syscall 0 */
+
+    default_rt_sigreturn = sigtramp_page;
+    unlock_user(tramp, sigtramp_page, 8);
+}
-- 
2.34.1

[PULL 03/23] linux-user: Add LoongArch elf support

[Richard Henderson]

From: Song Gao <gaosong@loongson.cn>

Signed-off-by: Song Gao <gaosong@loongson.cn>
Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20220624031049.1716097-4-gaosong@loongson.cn>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 linux-user/loongarch64/target_elf.h | 12 ++++
 linux-user/elfload.c                | 91 +++++++++++++++++++++++++++++
 2 files changed, 103 insertions(+)
 create mode 100644 linux-user/loongarch64/target_elf.h

diff --git a/linux-user/loongarch64/target_elf.h b/linux-user/loongarch64/target_elf.h
new file mode 100644
index 0000000000..95c3f05a46
--- /dev/null
+++ b/linux-user/loongarch64/target_elf.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (c) 2021 Loongson Technology Corporation Limited
+ */
+
+#ifndef LOONGARCH_TARGET_ELF_H
+#define LOONGARCH_TARGET_ELF_H
+static inline const char *cpu_get_model(uint32_t eflags)
+{
+    return "la464";
+}
+#endif
diff --git a/linux-user/elfload.c b/linux-user/elfload.c
index 163fc8a1ee..1de77c7959 100644
--- a/linux-user/elfload.c
+++ b/linux-user/elfload.c
@@ -922,6 +922,97 @@ static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUPPCState *en
 
 #endif
 
+#ifdef TARGET_LOONGARCH64
+
+#define ELF_START_MMAP 0x80000000
+
+#define ELF_CLASS   ELFCLASS64
+#define ELF_ARCH    EM_LOONGARCH
+
+#define elf_check_arch(x) ((x) == EM_LOONGARCH)
+
+static inline void init_thread(struct target_pt_regs *regs,
+                               struct image_info *infop)
+{
+    /*Set crmd PG,DA = 1,0 */
+    regs->csr.crmd = 2 << 3;
+    regs->csr.era = infop->entry;
+    regs->regs[3] = infop->start_stack;
+}
+
+/* See linux kernel: arch/loongarch/include/asm/elf.h */
+#define ELF_NREG 45
+typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
+
+enum {
+    TARGET_EF_R0 = 0,
+    TARGET_EF_CSR_ERA = TARGET_EF_R0 + 33,
+    TARGET_EF_CSR_BADV = TARGET_EF_R0 + 34,
+};
+
+static void elf_core_copy_regs(target_elf_gregset_t *regs,
+                               const CPULoongArchState *env)
+{
+    int i;
+
+    (*regs)[TARGET_EF_R0] = 0;
+
+    for (i = 1; i < ARRAY_SIZE(env->gpr); i++) {
+        (*regs)[TARGET_EF_R0 + i] = tswapreg(env->gpr[i]);
+    }
+
+    (*regs)[TARGET_EF_CSR_ERA] = tswapreg(env->pc);
+    (*regs)[TARGET_EF_CSR_BADV] = tswapreg(env->CSR_BADV);
+}
+
+#define USE_ELF_CORE_DUMP
+#define ELF_EXEC_PAGESIZE        4096
+
+#define ELF_HWCAP get_elf_hwcap()
+
+/* See arch/loongarch/include/uapi/asm/hwcap.h */
+enum {
+    HWCAP_LOONGARCH_CPUCFG   = (1 << 0),
+    HWCAP_LOONGARCH_LAM      = (1 << 1),
+    HWCAP_LOONGARCH_UAL      = (1 << 2),
+    HWCAP_LOONGARCH_FPU      = (1 << 3),
+    HWCAP_LOONGARCH_LSX      = (1 << 4),
+    HWCAP_LOONGARCH_LASX     = (1 << 5),
+    HWCAP_LOONGARCH_CRC32    = (1 << 6),
+    HWCAP_LOONGARCH_COMPLEX  = (1 << 7),
+    HWCAP_LOONGARCH_CRYPTO   = (1 << 8),
+    HWCAP_LOONGARCH_LVZ      = (1 << 9),
+    HWCAP_LOONGARCH_LBT_X86  = (1 << 10),
+    HWCAP_LOONGARCH_LBT_ARM  = (1 << 11),
+    HWCAP_LOONGARCH_LBT_MIPS = (1 << 12),
+};
+
+static uint32_t get_elf_hwcap(void)
+{
+    LoongArchCPU *cpu = LOONGARCH_CPU(thread_cpu);
+    uint32_t hwcaps = 0;
+
+    hwcaps |= HWCAP_LOONGARCH_CRC32;
+
+    if (FIELD_EX32(cpu->env.cpucfg[1], CPUCFG1, UAL)) {
+        hwcaps |= HWCAP_LOONGARCH_UAL;
+    }
+
+    if (FIELD_EX32(cpu->env.cpucfg[2], CPUCFG2, FP)) {
+        hwcaps |= HWCAP_LOONGARCH_FPU;
+    }
+
+    if (FIELD_EX32(cpu->env.cpucfg[2], CPUCFG2, LAM)) {
+        hwcaps |= HWCAP_LOONGARCH_LAM;
+    }
+
+    return hwcaps;
+}
+
+#define ELF_PLATFORM "loongarch"
+
+#endif /* TARGET_LOONGARCH64 */
+
 #ifdef TARGET_MIPS
 
 #define ELF_START_MMAP 0x80000000
-- 
2.34.1

[PULL 04/23] linux-user: Add LoongArch syscall support

[Richard Henderson]

From: Song Gao <gaosong@loongson.cn>

Signed-off-by: Song Gao <gaosong@loongson.cn>
Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20220624031049.1716097-5-gaosong@loongson.cn>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 linux-user/loongarch64/syscall_nr.h     | 312 ++++++++++++++++++++++++
 linux-user/loongarch64/target_syscall.h |  48 ++++
 linux-user/syscall_defs.h               |   6 +-
 scripts/gensyscalls.sh                  |   2 +
 4 files changed, 367 insertions(+), 1 deletion(-)
 create mode 100644 linux-user/loongarch64/syscall_nr.h
 create mode 100644 linux-user/loongarch64/target_syscall.h

diff --git a/linux-user/loongarch64/syscall_nr.h b/linux-user/loongarch64/syscall_nr.h
new file mode 100644
index 0000000000..be00915adf
--- /dev/null
+++ b/linux-user/loongarch64/syscall_nr.h
@@ -0,0 +1,312 @@
+/*
+ * This file contains the system call numbers.
+ * Do not modify.
+ * This file is generated by scripts/gensyscalls.sh
+ */
+#ifndef LINUX_USER_LOONGARCH_SYSCALL_NR_H
+#define LINUX_USER_LOONGARCH_SYSCALL_NR_H
+
+#define TARGET_NR_io_setup 0
+#define TARGET_NR_io_destroy 1
+#define TARGET_NR_io_submit 2
+#define TARGET_NR_io_cancel 3
+#define TARGET_NR_io_getevents 4
+#define TARGET_NR_setxattr 5
+#define TARGET_NR_lsetxattr 6
+#define TARGET_NR_fsetxattr 7
+#define TARGET_NR_getxattr 8
+#define TARGET_NR_lgetxattr 9
+#define TARGET_NR_fgetxattr 10
+#define TARGET_NR_listxattr 11
+#define TARGET_NR_llistxattr 12
+#define TARGET_NR_flistxattr 13
+#define TARGET_NR_removexattr 14
+#define TARGET_NR_lremovexattr 15
+#define TARGET_NR_fremovexattr 16
+#define TARGET_NR_getcwd 17
+#define TARGET_NR_lookup_dcookie 18
+#define TARGET_NR_eventfd2 19
+#define TARGET_NR_epoll_create1 20
+#define TARGET_NR_epoll_ctl 21
+#define TARGET_NR_epoll_pwait 22
+#define TARGET_NR_dup 23
+#define TARGET_NR_dup3 24
+#define TARGET_NR_fcntl 25
+#define TARGET_NR_inotify_init1 26
+#define TARGET_NR_inotify_add_watch 27
+#define TARGET_NR_inotify_rm_watch 28
+#define TARGET_NR_ioctl 29
+#define TARGET_NR_ioprio_set 30
+#define TARGET_NR_ioprio_get 31
+#define TARGET_NR_flock 32
+#define TARGET_NR_mknodat 33
+#define TARGET_NR_mkdirat 34
+#define TARGET_NR_unlinkat 35
+#define TARGET_NR_symlinkat 36
+#define TARGET_NR_linkat 37
+#define TARGET_NR_umount2 39
+#define TARGET_NR_mount 40
+#define TARGET_NR_pivot_root 41
+#define TARGET_NR_nfsservctl 42
+#define TARGET_NR_statfs 43
+#define TARGET_NR_fstatfs 44
+#define TARGET_NR_truncate 45
+#define TARGET_NR_ftruncate 46
+#define TARGET_NR_fallocate 47
+#define TARGET_NR_faccessat 48
+#define TARGET_NR_chdir 49
+#define TARGET_NR_fchdir 50
+#define TARGET_NR_chroot 51
+#define TARGET_NR_fchmod 52
+#define TARGET_NR_fchmodat 53
+#define TARGET_NR_fchownat 54
+#define TARGET_NR_fchown 55
+#define TARGET_NR_openat 56
+#define TARGET_NR_close 57
+#define TARGET_NR_vhangup 58
+#define TARGET_NR_pipe2 59
+#define TARGET_NR_quotactl 60
+#define TARGET_NR_getdents64 61
+#define TARGET_NR_lseek 62
+#define TARGET_NR_read 63
+#define TARGET_NR_write 64
+#define TARGET_NR_readv 65
+#define TARGET_NR_writev 66
+#define TARGET_NR_pread64 67
+#define TARGET_NR_pwrite64 68
+#define TARGET_NR_preadv 69
+#define TARGET_NR_pwritev 70
+#define TARGET_NR_sendfile 71
+#define TARGET_NR_pselect6 72
+#define TARGET_NR_ppoll 73
+#define TARGET_NR_signalfd4 74
+#define TARGET_NR_vmsplice 75
+#define TARGET_NR_splice 76
+#define TARGET_NR_tee 77
+#define TARGET_NR_readlinkat 78
+#define TARGET_NR_sync 81
+#define TARGET_NR_fsync 82
+#define TARGET_NR_fdatasync 83
+#define TARGET_NR_sync_file_range 84
+#define TARGET_NR_timerfd_create 85
+#define TARGET_NR_timerfd_settime 86
+#define TARGET_NR_timerfd_gettime 87
+#define TARGET_NR_utimensat 88
+#define TARGET_NR_acct 89
+#define TARGET_NR_capget 90
+#define TARGET_NR_capset 91
+#define TARGET_NR_personality 92
+#define TARGET_NR_exit 93
+#define TARGET_NR_exit_group 94
+#define TARGET_NR_waitid 95
+#define TARGET_NR_set_tid_address 96
+#define TARGET_NR_unshare 97
+#define TARGET_NR_futex 98
+#define TARGET_NR_set_robust_list 99
+#define TARGET_NR_get_robust_list 100
+#define TARGET_NR_nanosleep 101
+#define TARGET_NR_getitimer 102
+#define TARGET_NR_setitimer 103
+#define TARGET_NR_kexec_load 104
+#define TARGET_NR_init_module 105
+#define TARGET_NR_delete_module 106
+#define TARGET_NR_timer_create 107
+#define TARGET_NR_timer_gettime 108
+#define TARGET_NR_timer_getoverrun 109
+#define TARGET_NR_timer_settime 110
+#define TARGET_NR_timer_delete 111
+#define TARGET_NR_clock_settime 112
+#define TARGET_NR_clock_gettime 113
+#define TARGET_NR_clock_getres 114
+#define TARGET_NR_clock_nanosleep 115
+#define TARGET_NR_syslog 116
+#define TARGET_NR_ptrace 117
+#define TARGET_NR_sched_setparam 118
+#define TARGET_NR_sched_setscheduler 119
+#define TARGET_NR_sched_getscheduler 120
+#define TARGET_NR_sched_getparam 121
+#define TARGET_NR_sched_setaffinity 122
+#define TARGET_NR_sched_getaffinity 123
+#define TARGET_NR_sched_yield 124
+#define TARGET_NR_sched_get_priority_max 125
+#define TARGET_NR_sched_get_priority_min 126
+#define TARGET_NR_sched_rr_get_interval 127
+#define TARGET_NR_restart_syscall 128
+#define TARGET_NR_kill 129
+#define TARGET_NR_tkill 130
+#define TARGET_NR_tgkill 131
+#define TARGET_NR_sigaltstack 132
+#define TARGET_NR_rt_sigsuspend 133
+#define TARGET_NR_rt_sigaction 134
+#define TARGET_NR_rt_sigprocmask 135
+#define TARGET_NR_rt_sigpending 136
+#define TARGET_NR_rt_sigtimedwait 137
+#define TARGET_NR_rt_sigqueueinfo 138
+#define TARGET_NR_rt_sigreturn 139
+#define TARGET_NR_setpriority 140
+#define TARGET_NR_getpriority 141
+#define TARGET_NR_reboot 142
+#define TARGET_NR_setregid 143
+#define TARGET_NR_setgid 144
+#define TARGET_NR_setreuid 145
+#define TARGET_NR_setuid 146
+#define TARGET_NR_setresuid 147
+#define TARGET_NR_getresuid 148
+#define TARGET_NR_setresgid 149
+#define TARGET_NR_getresgid 150
+#define TARGET_NR_setfsuid 151
+#define TARGET_NR_setfsgid 152
+#define TARGET_NR_times 153
+#define TARGET_NR_setpgid 154
+#define TARGET_NR_getpgid 155
+#define TARGET_NR_getsid 156
+#define TARGET_NR_setsid 157
+#define TARGET_NR_getgroups 158
+#define TARGET_NR_setgroups 159
+#define TARGET_NR_uname 160
+#define TARGET_NR_sethostname 161
+#define TARGET_NR_setdomainname 162
+#define TARGET_NR_getrusage 165
+#define TARGET_NR_umask 166
+#define TARGET_NR_prctl 167
+#define TARGET_NR_getcpu 168
+#define TARGET_NR_gettimeofday 169
+#define TARGET_NR_settimeofday 170
+#define TARGET_NR_adjtimex 171
+#define TARGET_NR_getpid 172
+#define TARGET_NR_getppid 173
+#define TARGET_NR_getuid 174
+#define TARGET_NR_geteuid 175
+#define TARGET_NR_getgid 176
+#define TARGET_NR_getegid 177
+#define TARGET_NR_gettid 178
+#define TARGET_NR_sysinfo 179
+#define TARGET_NR_mq_open 180
+#define TARGET_NR_mq_unlink 181
+#define TARGET_NR_mq_timedsend 182
+#define TARGET_NR_mq_timedreceive 183
+#define TARGET_NR_mq_notify 184
+#define TARGET_NR_mq_getsetattr 185
+#define TARGET_NR_msgget 186
+#define TARGET_NR_msgctl 187
+#define TARGET_NR_msgrcv 188
+#define TARGET_NR_msgsnd 189
+#define TARGET_NR_semget 190
+#define TARGET_NR_semctl 191
+#define TARGET_NR_semtimedop 192
+#define TARGET_NR_semop 193
+#define TARGET_NR_shmget 194
+#define TARGET_NR_shmctl 195
+#define TARGET_NR_shmat 196
+#define TARGET_NR_shmdt 197
+#define TARGET_NR_socket 198
+#define TARGET_NR_socketpair 199
+#define TARGET_NR_bind 200
+#define TARGET_NR_listen 201
+#define TARGET_NR_accept 202
+#define TARGET_NR_connect 203
+#define TARGET_NR_getsockname 204
+#define TARGET_NR_getpeername 205
+#define TARGET_NR_sendto 206
+#define TARGET_NR_recvfrom 207
+#define TARGET_NR_setsockopt 208
+#define TARGET_NR_getsockopt 209
+#define TARGET_NR_shutdown 210
+#define TARGET_NR_sendmsg 211
+#define TARGET_NR_recvmsg 212
+#define TARGET_NR_readahead 213
+#define TARGET_NR_brk 214
+#define TARGET_NR_munmap 215
+#define TARGET_NR_mremap 216
+#define TARGET_NR_add_key 217
+#define TARGET_NR_request_key 218
+#define TARGET_NR_keyctl 219
+#define TARGET_NR_clone 220
+#define TARGET_NR_execve 221
+#define TARGET_NR_mmap 222
+#define TARGET_NR_fadvise64 223
+#define TARGET_NR_swapon 224
+#define TARGET_NR_swapoff 225
+#define TARGET_NR_mprotect 226
+#define TARGET_NR_msync 227
+#define TARGET_NR_mlock 228
+#define TARGET_NR_munlock 229
+#define TARGET_NR_mlockall 230
+#define TARGET_NR_munlockall 231
+#define TARGET_NR_mincore 232
+#define TARGET_NR_madvise 233
+#define TARGET_NR_remap_file_pages 234
+#define TARGET_NR_mbind 235
+#define TARGET_NR_get_mempolicy 236
+#define TARGET_NR_set_mempolicy 237
+#define TARGET_NR_migrate_pages 238
+#define TARGET_NR_move_pages 239
+#define TARGET_NR_rt_tgsigqueueinfo 240
+#define TARGET_NR_perf_event_open 241
+#define TARGET_NR_accept4 242
+#define TARGET_NR_recvmmsg 243
+#define TARGET_NR_arch_specific_syscall 244
+#define TARGET_NR_wait4 260
+#define TARGET_NR_prlimit64 261
+#define TARGET_NR_fanotify_init 262
+#define TARGET_NR_fanotify_mark 263
+#define TARGET_NR_name_to_handle_at 264
+#define TARGET_NR_open_by_handle_at 265
+#define TARGET_NR_clock_adjtime 266
+#define TARGET_NR_syncfs 267
+#define TARGET_NR_setns 268
+#define TARGET_NR_sendmmsg 269
+#define TARGET_NR_process_vm_readv 270
+#define TARGET_NR_process_vm_writev 271
+#define TARGET_NR_kcmp 272
+#define TARGET_NR_finit_module 273
+#define TARGET_NR_sched_setattr 274
+#define TARGET_NR_sched_getattr 275
+#define TARGET_NR_renameat2 276
+#define TARGET_NR_seccomp 277
+#define TARGET_NR_getrandom 278
+#define TARGET_NR_memfd_create 279
+#define TARGET_NR_bpf 280
+#define TARGET_NR_execveat 281
+#define TARGET_NR_userfaultfd 282
+#define TARGET_NR_membarrier 283
+#define TARGET_NR_mlock2 284
+#define TARGET_NR_copy_file_range 285
+#define TARGET_NR_preadv2 286
+#define TARGET_NR_pwritev2 287
+#define TARGET_NR_pkey_mprotect 288
+#define TARGET_NR_pkey_alloc 289
+#define TARGET_NR_pkey_free 290
+#define TARGET_NR_statx 291
+#define TARGET_NR_io_pgetevents 292
+#define TARGET_NR_rseq 293
+#define TARGET_NR_kexec_file_load 294
+#define TARGET_NR_pidfd_send_signal 424
+#define TARGET_NR_io_uring_setup 425
+#define TARGET_NR_io_uring_enter 426
+#define TARGET_NR_io_uring_register 427
+#define TARGET_NR_open_tree 428
+#define TARGET_NR_move_mount 429
+#define TARGET_NR_fsopen 430
+#define TARGET_NR_fsconfig 431
+#define TARGET_NR_fsmount 432
+#define TARGET_NR_fspick 433
+#define TARGET_NR_pidfd_open 434
+#define TARGET_NR_clone3 435
+#define TARGET_NR_close_range 436
+#define TARGET_NR_openat2 437
+#define TARGET_NR_pidfd_getfd 438
+#define TARGET_NR_faccessat2 439
+#define TARGET_NR_process_madvise 440
+#define TARGET_NR_epoll_pwait2 441
+#define TARGET_NR_mount_setattr 442
+#define TARGET_NR_quotactl_fd 443
+#define TARGET_NR_landlock_create_ruleset 444
+#define TARGET_NR_landlock_add_rule 445
+#define TARGET_NR_landlock_restrict_self 446
+#define TARGET_NR_process_mrelease 448
+#define TARGET_NR_futex_waitv 449
+#define TARGET_NR_set_mempolicy_home_node 450
+#define TARGET_NR_syscalls 451
+
+#endif /* LINUX_USER_LOONGARCH_SYSCALL_NR_H */
diff --git a/linux-user/loongarch64/target_syscall.h b/linux-user/loongarch64/target_syscall.h
new file mode 100644
index 0000000000..8b5de52124
--- /dev/null
+++ b/linux-user/loongarch64/target_syscall.h
@@ -0,0 +1,48 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (c) 2021 Loongson Technology Corporation Limited
+ */
+
+#ifndef LOONGARCH_TARGET_SYSCALL_H
+#define LOONGARCH_TARGET_SYSCALL_H
+
+#include "qemu/units.h"
+
+/*
+ * this struct defines the way the registers are stored on the
+ * stack during a system call.
+ */
+
+struct target_pt_regs {
+    /* Saved main processor registers. */
+    target_ulong regs[32];
+
+    /* Saved special registers. */
+    struct {
+        target_ulong era;
+        target_ulong badv;
+        target_ulong crmd;
+        target_ulong prmd;
+        target_ulong euen;
+        target_ulong ecfg;
+        target_ulong estat;
+    } csr;
+    target_ulong orig_a0;
+    target_ulong __last[0];
+};
+
+#define UNAME_MACHINE "loongarch64"
+#define UNAME_MINIMUM_RELEASE "5.19.0"
+
+#define TARGET_MCL_CURRENT 1
+#define TARGET_MCL_FUTURE  2
+#define TARGET_MCL_ONFAULT 4
+
+#define TARGET_FORCE_SHMLBA
+
+static inline abi_ulong target_shmlba(CPULoongArchState *env)
+{
+    return 64 * KiB;
+}
+
+#endif
diff --git a/linux-user/syscall_defs.h b/linux-user/syscall_defs.h
index 4587b62ac9..85b0f33e91 100644
--- a/linux-user/syscall_defs.h
+++ b/linux-user/syscall_defs.h
@@ -74,7 +74,7 @@
     || defined(TARGET_M68K) || defined(TARGET_CRIS) \
     || defined(TARGET_S390X) || defined(TARGET_OPENRISC) \
     || defined(TARGET_NIOS2) || defined(TARGET_RISCV) \
-    || defined(TARGET_XTENSA)
+    || defined(TARGET_XTENSA) || defined(TARGET_LOONGARCH64)
 
 #define TARGET_IOC_SIZEBITS	14
 #define TARGET_IOC_DIRBITS	2
@@ -2196,6 +2196,10 @@ struct target_stat64 {
     uint64_t   st_ino;
 };
 
+#elif defined(TARGET_LOONGARCH64)
+
+/* LoongArch no newfstatat/fstat syscall. */
+
 #else
 #error unsupported CPU
 #endif
diff --git a/scripts/gensyscalls.sh b/scripts/gensyscalls.sh
index 8fb450e3c9..a2f7664b7b 100755
--- a/scripts/gensyscalls.sh
+++ b/scripts/gensyscalls.sh
@@ -44,6 +44,7 @@ read_includes()
 
      cpp -P -nostdinc -fdirectives-only \
         -D_UAPI_ASM_$(upper ${arch})_BITSPERLONG_H \
+        -D__ASM_$(upper ${arch})_BITSPERLONG_H \
         -D__BITS_PER_LONG=${bits} \
         -I${linux}/arch/${arch}/include/uapi/ \
         -I${linux}/include/uapi \
@@ -99,4 +100,5 @@ generate_syscall_nr openrisc 32 "$output/linux-user/openrisc/syscall_nr.h"
 generate_syscall_nr riscv 32 "$output/linux-user/riscv/syscall32_nr.h"
 generate_syscall_nr riscv 64 "$output/linux-user/riscv/syscall64_nr.h"
 generate_syscall_nr hexagon 32 "$output/linux-user/hexagon/syscall_nr.h"
+generate_syscall_nr loongarch 64 "$output/linux-user/loongarch64/syscall_nr.h"
 rm -fr "$TMP"
-- 
2.34.1

[PULL 05/23] linux-user: Add LoongArch cpu_loop support

[Richard Henderson]

From: Song Gao <gaosong@loongson.cn>

Signed-off-by: Song Gao <gaosong@loongson.cn>
Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220624031049.1716097-6-gaosong@loongson.cn>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 linux-user/loongarch64/target_cpu.h | 34 ++++++++++
 linux-user/loongarch64/cpu_loop.c   | 96 +++++++++++++++++++++++++++++
 2 files changed, 130 insertions(+)
 create mode 100644 linux-user/loongarch64/target_cpu.h
 create mode 100644 linux-user/loongarch64/cpu_loop.c

diff --git a/linux-user/loongarch64/target_cpu.h b/linux-user/loongarch64/target_cpu.h
new file mode 100644
index 0000000000..a29af66156
--- /dev/null
+++ b/linux-user/loongarch64/target_cpu.h
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * LoongArch specific CPU ABI and functions for linux-user
+ *
+ * Copyright (c) 2021 Loongson Technology Corporation Limited
+ */
+
+#ifndef LOONGARCH_TARGET_CPU_H
+#define LOONGARCH_TARGET_CPU_H
+
+static inline void cpu_clone_regs_child(CPULoongArchState *env,
+                                        target_ulong newsp, unsigned flags)
+{
+    if (newsp) {
+        env->gpr[3] = newsp;
+    }
+    env->gpr[4] = 0;
+}
+
+static inline void cpu_clone_regs_parent(CPULoongArchState *env,
+                                         unsigned flags)
+{
+}
+
+static inline void cpu_set_tls(CPULoongArchState *env, target_ulong newtls)
+{
+    env->gpr[2] = newtls;
+}
+
+static inline abi_ulong get_sp_from_cpustate(CPULoongArchState *state)
+{
+    return state->gpr[3];
+}
+#endif
diff --git a/linux-user/loongarch64/cpu_loop.c b/linux-user/loongarch64/cpu_loop.c
new file mode 100644
index 0000000000..894fdd111a
--- /dev/null
+++ b/linux-user/loongarch64/cpu_loop.c
@@ -0,0 +1,96 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * QEMU LoongArch user cpu_loop.
+ *
+ * Copyright (c) 2021 Loongson Technology Corporation Limited
+ */
+
+#include "qemu/osdep.h"
+#include "qemu.h"
+#include "user-internals.h"
+#include "cpu_loop-common.h"
+#include "signal-common.h"
+
+void cpu_loop(CPULoongArchState *env)
+{
+    CPUState *cs = env_cpu(env);
+    int trapnr, si_code;
+    abi_long ret;
+
+    for (;;) {
+        cpu_exec_start(cs);
+        trapnr = cpu_exec(cs);
+        cpu_exec_end(cs);
+        process_queued_cpu_work(cs);
+
+        switch (trapnr) {
+        case EXCP_INTERRUPT:
+            /* just indicate that signals should be handled asap */
+            break;
+        case EXCCODE_SYS:
+            env->pc += 4;
+            ret = do_syscall(env, env->gpr[11],
+                             env->gpr[4], env->gpr[5],
+                             env->gpr[6], env->gpr[7],
+                             env->gpr[8], env->gpr[9],
+                             -1, -1);
+            if (ret == -QEMU_ERESTARTSYS) {
+                env->pc -= 4;
+                break;
+            }
+            if (ret == -QEMU_ESIGRETURN) {
+                /*
+                 * Returning from a successful sigreturn syscall.
+                 * Avoid clobbering register state.
+                 */
+                break;
+            }
+            env->gpr[4] = ret;
+            break;
+        case EXCCODE_INE:
+            force_sig_fault(TARGET_SIGILL, 0, env->pc);
+            break;
+        case EXCCODE_FPE:
+            si_code = TARGET_FPE_FLTUNK;
+            if (GET_FP_CAUSE(env->fcsr0) & FP_INVALID) {
+                si_code = TARGET_FPE_FLTINV;
+            } else if (GET_FP_CAUSE(env->fcsr0) & FP_DIV0) {
+                si_code = TARGET_FPE_FLTDIV;
+            } else if (GET_FP_CAUSE(env->fcsr0) & FP_OVERFLOW) {
+                si_code = TARGET_FPE_FLTOVF;
+            } else if (GET_FP_CAUSE(env->fcsr0) & FP_UNDERFLOW) {
+                si_code = TARGET_FPE_FLTUND;
+            } else if (GET_FP_CAUSE(env->fcsr0) & FP_INEXACT) {
+                si_code = TARGET_FPE_FLTRES;
+            }
+            force_sig_fault(TARGET_SIGFPE, si_code, env->pc);
+            break;
+        case EXCP_DEBUG:
+        case EXCCODE_BRK:
+            force_sig_fault(TARGET_SIGTRAP, TARGET_TRAP_BRKPT, env->pc);
+            break;
+        case EXCCODE_BCE:
+            force_sig_fault(TARGET_SIGSYS, TARGET_SI_KERNEL, env->pc);
+            break;
+        case EXCP_ATOMIC:
+            cpu_exec_step_atomic(cs);
+            break;
+        default:
+            EXCP_DUMP(env, "qemu: unhandled CPU exception 0x%x - aborting\n",
+                      trapnr);
+            exit(EXIT_FAILURE);
+        }
+        process_pending_signals(env);
+    }
+}
+
+void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
+{
+    int i;
+
+    for (i = 0; i < 32; i++) {
+        env->gpr[i] = regs->regs[i];
+    }
+    env->pc = regs->csr.era;
+
+}
-- 
2.34.1

[PULL 06/23] scripts: add loongarch64 binfmt config

[Richard Henderson]

From: Song Gao <gaosong@loongson.cn>

Signed-off-by: Song Gao <gaosong@loongson.cn>
Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220624031049.1716097-7-gaosong@loongson.cn>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 scripts/qemu-binfmt-conf.sh | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/scripts/qemu-binfmt-conf.sh b/scripts/qemu-binfmt-conf.sh
index 9cb723f443..1f4e2cd19d 100755
--- a/scripts/qemu-binfmt-conf.sh
+++ b/scripts/qemu-binfmt-conf.sh
@@ -4,7 +4,7 @@
 qemu_target_list="i386 i486 alpha arm armeb sparc sparc32plus sparc64 \
 ppc ppc64 ppc64le m68k mips mipsel mipsn32 mipsn32el mips64 mips64el \
 sh4 sh4eb s390x aarch64 aarch64_be hppa riscv32 riscv64 xtensa xtensaeb \
-microblaze microblazeel or1k x86_64 hexagon"
+microblaze microblazeel or1k x86_64 hexagon loongarch64"
 
 i386_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x03\x00'
 i386_mask='\xff\xff\xff\xff\xff\xfe\xfe\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
@@ -140,6 +140,10 @@ hexagon_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x
 hexagon_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
 hexagon_family=hexagon
 
+loongarch64_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x02\x01'
+loongarch64_mask='\xff\xff\xff\xff\xff\xff\xff\xfc\x00\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
+loongarch64_family=loongarch
+
 qemu_get_family() {
     cpu=${HOST_ARCH:-$(uname -m)}
     case "$cpu" in
-- 
2.34.1

[PULL 07/23] target/loongarch: remove badaddr from CPULoongArch

[Richard Henderson]

From: Song Gao <gaosong@loongson.cn>

We can use CSR_BADV to replace badaddr.

Signed-off-by: Song Gao <gaosong@loongson.cn>
Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220624031049.1716097-8-gaosong@loongson.cn>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/loongarch/cpu.h     | 2 --
 target/loongarch/gdbstub.c | 2 +-
 2 files changed, 1 insertion(+), 3 deletions(-)

diff --git a/target/loongarch/cpu.h b/target/loongarch/cpu.h
index 71a5036c3c..4b4fbcdc71 100644
--- a/target/loongarch/cpu.h
+++ b/target/loongarch/cpu.h
@@ -246,8 +246,6 @@ typedef struct CPUArchState {
     uint64_t lladdr; /* LL virtual address compared against SC */
     uint64_t llval;
 
-    uint64_t badaddr;
-
     /* LoongArch CSRs */
     uint64_t CSR_CRMD;
     uint64_t CSR_PRMD;
diff --git a/target/loongarch/gdbstub.c b/target/loongarch/gdbstub.c
index 0c48834201..24e126fb2d 100644
--- a/target/loongarch/gdbstub.c
+++ b/target/loongarch/gdbstub.c
@@ -21,7 +21,7 @@ int loongarch_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
     } else if (n == 32) {
         return gdb_get_regl(mem_buf, env->pc);
     } else if (n == 33) {
-        return gdb_get_regl(mem_buf, env->badaddr);
+        return gdb_get_regl(mem_buf, env->CSR_BADV);
     }
     return 0;
 }
-- 
2.34.1

[PULL 08/23] target/loongarch: Fix missing update CSR_BADV

[Richard Henderson]

From: Song Gao <gaosong@loongson.cn>

loongarch_cpu_do_interrupt() should update CSR_BADV for some EXCCODE.

Signed-off-by: Song Gao <gaosong@loongson.cn>
Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220624031049.1716097-9-gaosong@loongson.cn>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/loongarch/cpu.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/target/loongarch/cpu.c b/target/loongarch/cpu.c
index 4c8f96bc3a..e32d4cc269 100644
--- a/target/loongarch/cpu.c
+++ b/target/loongarch/cpu.c
@@ -171,18 +171,20 @@ static void loongarch_cpu_do_interrupt(CPUState *cs)
         cause = cs->exception_index;
         update_badinstr = 0;
         break;
-    case EXCCODE_ADEM:
     case EXCCODE_SYS:
     case EXCCODE_BRK:
+    case EXCCODE_INE:
+    case EXCCODE_IPE:
+    case EXCCODE_FPE:
+        env->CSR_BADV = env->pc;
+        QEMU_FALLTHROUGH;
+    case EXCCODE_ADEM:
     case EXCCODE_PIL:
     case EXCCODE_PIS:
     case EXCCODE_PME:
     case EXCCODE_PNR:
     case EXCCODE_PNX:
     case EXCCODE_PPI:
-    case EXCCODE_INE:
-    case EXCCODE_IPE:
-    case EXCCODE_FPE:
         cause = cs->exception_index;
         break;
     default:
-- 
2.34.1

[PULL 09/23] target/loongarch: Fix helper_asrtle_d/asrtgt_d raise wrong exception

[Richard Henderson]

From: Song Gao <gaosong@loongson.cn>

Raise EXCCODE_BCE instead of EXCCODE_ADEM for helper_asrtle_d/asrtgt_d.

Signed-off-by: Song Gao <gaosong@loongson.cn>
Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220624031049.1716097-10-gaosong@loongson.cn>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/loongarch/cpu.c       | 2 ++
 target/loongarch/op_helper.c | 4 ++--
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/target/loongarch/cpu.c b/target/loongarch/cpu.c
index e32d4cc269..0013582a3a 100644
--- a/target/loongarch/cpu.c
+++ b/target/loongarch/cpu.c
@@ -51,6 +51,7 @@ static const char * const excp_names[] = {
     [EXCCODE_IPE] = "Instruction privilege error",
     [EXCCODE_FPE] = "Floating Point Exception",
     [EXCCODE_DBP] = "Debug breakpoint",
+    [EXCCODE_BCE] = "Bound Check Exception",
 };
 
 const char *loongarch_exception_name(int32_t exception)
@@ -176,6 +177,7 @@ static void loongarch_cpu_do_interrupt(CPUState *cs)
     case EXCCODE_INE:
     case EXCCODE_IPE:
     case EXCCODE_FPE:
+    case EXCCODE_BCE:
         env->CSR_BADV = env->pc;
         QEMU_FALLTHROUGH;
     case EXCCODE_ADEM:
diff --git a/target/loongarch/op_helper.c b/target/loongarch/op_helper.c
index d87049851f..df049cec59 100644
--- a/target/loongarch/op_helper.c
+++ b/target/loongarch/op_helper.c
@@ -49,14 +49,14 @@ target_ulong helper_bitswap(target_ulong v)
 void helper_asrtle_d(CPULoongArchState *env, target_ulong rj, target_ulong rk)
 {
     if (rj > rk) {
-        do_raise_exception(env, EXCCODE_ADEM, GETPC());
+        do_raise_exception(env, EXCCODE_BCE, 0);
     }
 }
 
 void helper_asrtgt_d(CPULoongArchState *env, target_ulong rj, target_ulong rk)
 {
     if (rj <= rk) {
-        do_raise_exception(env, EXCCODE_ADEM, GETPC());
+        do_raise_exception(env, EXCCODE_BCE, 0);
     }
 }
 
-- 
2.34.1

[PULL 10/23] target/loongarch: remove unused include hw/loader.h

[Richard Henderson]

From: Song Gao <gaosong@loongson.cn>

Signed-off-by: Song Gao <gaosong@loongson.cn>
Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220624031049.1716097-11-gaosong@loongson.cn>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/loongarch/cpu.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/target/loongarch/cpu.c b/target/loongarch/cpu.c
index 0013582a3a..bf163a8dce 100644
--- a/target/loongarch/cpu.c
+++ b/target/loongarch/cpu.c
@@ -18,7 +18,6 @@
 #include "fpu/softfloat-helpers.h"
 #include "cpu-csr.h"
 #include "sysemu/reset.h"
-#include "hw/loader.h"
 
 const char * const regnames[32] = {
     "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
-- 
2.34.1

[PULL 11/23] target/loongarch: Adjust functions and structure to support user-mode

[Richard Henderson]

From: Song Gao <gaosong@loongson.cn>

Some functions and member of the structure are different with softmmu-mode
So we need adjust them to support user-mode.

Signed-off-by: Song Gao <gaosong@loongson.cn>
Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220624031049.1716097-12-gaosong@loongson.cn>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/loongarch/cpu.h                        |  6 ++++
 target/loongarch/helper.h                     |  2 ++
 target/loongarch/internals.h                  |  2 ++
 target/loongarch/cpu.c                        | 21 ++++++++++-
 target/loongarch/op_helper.c                  |  6 ++++
 .../insn_trans/trans_privileged.c.inc         | 36 +++++++++++++++++++
 6 files changed, 72 insertions(+), 1 deletion(-)

diff --git a/target/loongarch/cpu.h b/target/loongarch/cpu.h
index 4b4fbcdc71..d141ec9b5d 100644
--- a/target/loongarch/cpu.h
+++ b/target/loongarch/cpu.h
@@ -301,6 +301,7 @@ typedef struct CPUArchState {
     uint64_t CSR_DERA;
     uint64_t CSR_DSAVE;
 
+#ifndef CONFIG_USER_ONLY
     LoongArchTLB  tlb[LOONGARCH_TLB_MAX];
 
     AddressSpace address_space_iocsr;
@@ -308,6 +309,7 @@ typedef struct CPUArchState {
     MemoryRegion iocsr_mem;
     bool load_elf;
     uint64_t elf_address;
+#endif
 } CPULoongArchState;
 
 /**
@@ -358,12 +360,16 @@ struct LoongArchCPUClass {
 
 static inline int cpu_mmu_index(CPULoongArchState *env, bool ifetch)
 {
+#ifdef CONFIG_USER_ONLY
+    return MMU_USER_IDX;
+#else
     uint8_t pg = FIELD_EX64(env->CSR_CRMD, CSR_CRMD, PG);
 
     if (!pg) {
         return MMU_DA_IDX;
     }
     return FIELD_EX64(env->CSR_CRMD, CSR_CRMD, PLV);
+#endif
 }
 
 static inline void cpu_get_tb_cpu_state(CPULoongArchState *env,
diff --git a/target/loongarch/helper.h b/target/loongarch/helper.h
index 85c11a60d4..cbbe008f32 100644
--- a/target/loongarch/helper.h
+++ b/target/loongarch/helper.h
@@ -95,6 +95,7 @@ DEF_HELPER_FLAGS_2(set_rounding_mode, TCG_CALL_NO_RWG, void, env, i32)
 
 DEF_HELPER_1(rdtime_d, i64, env)
 
+#ifndef CONFIG_USER_ONLY
 /* CSRs helper */
 DEF_HELPER_1(csrrd_pgd, i64, env)
 DEF_HELPER_1(csrrd_tval, i64, env)
@@ -128,3 +129,4 @@ DEF_HELPER_4(lddir, tl, env, tl, tl, i32)
 DEF_HELPER_4(ldpte, void, env, tl, tl, i32)
 DEF_HELPER_1(ertn, void, env)
 DEF_HELPER_1(idle, void, env)
+#endif
diff --git a/target/loongarch/internals.h b/target/loongarch/internals.h
index 9d50fbdd81..ea227362b6 100644
--- a/target/loongarch/internals.h
+++ b/target/loongarch/internals.h
@@ -33,6 +33,7 @@ const char *loongarch_exception_name(int32_t exception);
 
 void restore_fp_status(CPULoongArchState *env);
 
+#ifndef CONFIG_USER_ONLY
 extern const VMStateDescription vmstate_loongarch_cpu;
 
 void loongarch_cpu_set_irq(void *opaque, int irq, int level);
@@ -48,6 +49,7 @@ bool loongarch_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
                             bool probe, uintptr_t retaddr);
 
 hwaddr loongarch_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
+#endif /* !CONFIG_USER_ONLY */
 
 int loongarch_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n);
 int loongarch_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n);
diff --git a/target/loongarch/cpu.c b/target/loongarch/cpu.c
index bf163a8dce..47c0bdd1ac 100644
--- a/target/loongarch/cpu.c
+++ b/target/loongarch/cpu.c
@@ -82,6 +82,7 @@ static void loongarch_cpu_set_pc(CPUState *cs, vaddr value)
     env->pc = value;
 }
 
+#ifndef CONFIG_USER_ONLY
 #include "hw/loongarch/virt.h"
 
 void loongarch_cpu_set_irq(void *opaque, int irq, int level)
@@ -295,6 +296,7 @@ static bool loongarch_cpu_exec_interrupt(CPUState *cs, int interrupt_request)
     }
     return false;
 }
+#endif
 
 #ifdef CONFIG_TCG
 static void loongarch_cpu_synchronize_from_tb(CPUState *cs,
@@ -309,6 +311,9 @@ static void loongarch_cpu_synchronize_from_tb(CPUState *cs,
 
 static bool loongarch_cpu_has_work(CPUState *cs)
 {
+#ifdef CONFIG_USER_ONLY
+    return true;
+#else
     LoongArchCPU *cpu = LOONGARCH_CPU(cs);
     CPULoongArchState *env = &cpu->env;
     bool has_work = false;
@@ -319,6 +324,7 @@ static bool loongarch_cpu_has_work(CPUState *cs)
     }
 
     return has_work;
+#endif
 }
 
 static void loongarch_la464_initfn(Object *obj)
@@ -467,7 +473,9 @@ static void loongarch_cpu_reset(DeviceState *dev)
         env->CSR_DMW[n] = FIELD_DP64(env->CSR_DMW[n], CSR_DMW, PLV3, 0);
     }
 
+#ifndef CONFIG_USER_ONLY
     env->pc = 0x1c000000;
+#endif
 
     restore_fp_status(env);
     cs->exception_index = -1;
@@ -498,6 +506,7 @@ static void loongarch_cpu_realizefn(DeviceState *dev, Error **errp)
     lacc->parent_realize(dev, errp);
 }
 
+#ifndef CONFIG_USER_ONLY
 static void loongarch_qemu_write(void *opaque, hwaddr addr,
                                  uint64_t val, unsigned size)
 {
@@ -532,13 +541,16 @@ static const MemoryRegionOps loongarch_qemu_ops = {
         .max_access_size = 8,
     },
 };
+#endif
 
 static void loongarch_cpu_init(Object *obj)
 {
     LoongArchCPU *cpu = LOONGARCH_CPU(obj);
-    CPULoongArchState *env = &cpu->env;
 
     cpu_set_cpustate_pointers(cpu);
+
+#ifndef CONFIG_USER_ONLY
+    CPULoongArchState *env = &cpu->env;
     qdev_init_gpio_in(DEVICE(cpu), loongarch_cpu_set_irq, N_IRQS);
     timer_init_ns(&cpu->timer, QEMU_CLOCK_VIRTUAL,
                   &loongarch_constant_timer_cb, cpu);
@@ -548,6 +560,7 @@ static void loongarch_cpu_init(Object *obj)
     memory_region_init_io(&env->iocsr_mem, OBJECT(cpu), &loongarch_qemu_ops,
                           NULL, "iocsr_misc", 0x428);
     memory_region_add_subregion(&env->system_iocsr, 0, &env->iocsr_mem);
+#endif
 }
 
 static ObjectClass *loongarch_cpu_class_by_name(const char *cpu_model)
@@ -615,18 +628,22 @@ static struct TCGCPUOps loongarch_tcg_ops = {
     .initialize = loongarch_translate_init,
     .synchronize_from_tb = loongarch_cpu_synchronize_from_tb,
 
+#ifndef CONFIG_USER_ONLY
     .tlb_fill = loongarch_cpu_tlb_fill,
     .cpu_exec_interrupt = loongarch_cpu_exec_interrupt,
     .do_interrupt = loongarch_cpu_do_interrupt,
     .do_transaction_failed = loongarch_cpu_do_transaction_failed,
+#endif
 };
 #endif /* CONFIG_TCG */
 
+#ifndef CONFIG_USER_ONLY
 #include "hw/core/sysemu-cpu-ops.h"
 
 static const struct SysemuCPUOps loongarch_sysemu_ops = {
     .get_phys_page_debug = loongarch_cpu_get_phys_page_debug,
 };
+#endif
 
 static void loongarch_cpu_class_init(ObjectClass *c, void *data)
 {
@@ -642,8 +659,10 @@ static void loongarch_cpu_class_init(ObjectClass *c, void *data)
     cc->has_work = loongarch_cpu_has_work;
     cc->dump_state = loongarch_cpu_dump_state;
     cc->set_pc = loongarch_cpu_set_pc;
+#ifndef CONFIG_USER_ONLY
     dc->vmsd = &vmstate_loongarch_cpu;
     cc->sysemu_ops = &loongarch_sysemu_ops;
+#endif
     cc->disas_set_info = loongarch_cpu_disas_set_info;
     cc->gdb_read_register = loongarch_cpu_gdb_read_register;
     cc->gdb_write_register = loongarch_cpu_gdb_write_register;
diff --git a/target/loongarch/op_helper.c b/target/loongarch/op_helper.c
index df049cec59..4b429b6699 100644
--- a/target/loongarch/op_helper.c
+++ b/target/loongarch/op_helper.c
@@ -86,6 +86,9 @@ target_ulong helper_cpucfg(CPULoongArchState *env, target_ulong rj)
 
 uint64_t helper_rdtime_d(CPULoongArchState *env)
 {
+#ifdef CONFIG_USER_ONLY
+    return cpu_get_host_ticks();
+#else
     uint64_t plv;
     LoongArchCPU *cpu = env_archcpu(env);
 
@@ -95,8 +98,10 @@ uint64_t helper_rdtime_d(CPULoongArchState *env)
     }
 
     return cpu_loongarch_get_constant_timer_counter(cpu);
+#endif
 }
 
+#ifndef CONFIG_USER_ONLY
 void helper_ertn(CPULoongArchState *env)
 {
     uint64_t csr_pplv, csr_pie;
@@ -131,3 +136,4 @@ void helper_idle(CPULoongArchState *env)
     cs->halted = 1;
     do_raise_exception(env, EXCP_HLT, 0);
 }
+#endif
diff --git a/target/loongarch/insn_trans/trans_privileged.c.inc b/target/loongarch/insn_trans/trans_privileged.c.inc
index 53596c4f77..9c4dcbfcfb 100644
--- a/target/loongarch/insn_trans/trans_privileged.c.inc
+++ b/target/loongarch/insn_trans/trans_privileged.c.inc
@@ -7,6 +7,41 @@
 
 #include "cpu-csr.h"
 
+#ifdef CONFIG_USER_ONLY
+
+#define GEN_FALSE_TRANS(name)   \
+static bool trans_##name(DisasContext *ctx, arg_##name * a)  \
+{   \
+    return false;   \
+}
+
+GEN_FALSE_TRANS(csrrd)
+GEN_FALSE_TRANS(csrwr)
+GEN_FALSE_TRANS(csrxchg)
+GEN_FALSE_TRANS(iocsrrd_b)
+GEN_FALSE_TRANS(iocsrrd_h)
+GEN_FALSE_TRANS(iocsrrd_w)
+GEN_FALSE_TRANS(iocsrrd_d)
+GEN_FALSE_TRANS(iocsrwr_b)
+GEN_FALSE_TRANS(iocsrwr_h)
+GEN_FALSE_TRANS(iocsrwr_w)
+GEN_FALSE_TRANS(iocsrwr_d)
+GEN_FALSE_TRANS(tlbsrch)
+GEN_FALSE_TRANS(tlbrd)
+GEN_FALSE_TRANS(tlbwr)
+GEN_FALSE_TRANS(tlbfill)
+GEN_FALSE_TRANS(tlbclr)
+GEN_FALSE_TRANS(tlbflush)
+GEN_FALSE_TRANS(invtlb)
+GEN_FALSE_TRANS(cacop)
+GEN_FALSE_TRANS(ldpte)
+GEN_FALSE_TRANS(lddir)
+GEN_FALSE_TRANS(ertn)
+GEN_FALSE_TRANS(dbcl)
+GEN_FALSE_TRANS(idle)
+
+#else
+
 typedef void (*GenCSRRead)(TCGv dest, TCGv_ptr env);
 typedef void (*GenCSRWrite)(TCGv dest, TCGv_ptr env, TCGv src);
 
@@ -464,3 +499,4 @@ static bool trans_idle(DisasContext *ctx, arg_idle *a)
     ctx->base.is_jmp = DISAS_NORETURN;
     return true;
 }
+#endif
-- 
2.34.1

[PULL 12/23] default-configs: Add loongarch linux-user support

[Richard Henderson]

From: Song Gao <gaosong@loongson.cn>

This patch adds loongarch64 linux-user default configs file.

Signed-off-by: Song Gao <gaosong@loongson.cn>
Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: WANG Xuerui <git@xen0n.name>
Message-Id: <20220624031049.1716097-13-gaosong@loongson.cn>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 configs/targets/loongarch64-linux-user.mak | 3 +++
 1 file changed, 3 insertions(+)
 create mode 100644 configs/targets/loongarch64-linux-user.mak

diff --git a/configs/targets/loongarch64-linux-user.mak b/configs/targets/loongarch64-linux-user.mak
new file mode 100644
index 0000000000..7d1b964020
--- /dev/null
+++ b/configs/targets/loongarch64-linux-user.mak
@@ -0,0 +1,3 @@
+# Default configuration for loongarch64-linux-user
+TARGET_ARCH=loongarch64
+TARGET_BASE_ARCH=loongarch
-- 
2.34.1

[PULL 13/23] target/loongarch: Update README

[Richard Henderson]

From: Song Gao <gaosong@loongson.cn>

Add linux-user emulation introduction

Signed-off-by: Song Gao <gaosong@loongson.cn>
Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220624031049.1716097-14-gaosong@loongson.cn>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/loongarch/README | 39 +++++++++++++++++++++++++++++++++++++--
 1 file changed, 37 insertions(+), 2 deletions(-)

diff --git a/target/loongarch/README b/target/loongarch/README
index 4dcd0f1682..9f5edd10c8 100644
--- a/target/loongarch/README
+++ b/target/loongarch/README
@@ -24,9 +24,9 @@
 
     Download cross-tools.
 
-      wget https://github.com/loongson/build-tools/releases/latest/download/loongarch64-clfs-20211202-cross-tools.tar.xz
+      wget https://github.com/loongson/build-tools/releases/download/2022.05.29/loongarch64-clfs-5.0-cross-tools-gcc-full.tar.xz
 
-      tar -vxf loongarch64-clfs-20211202-cross-tools.tar.xz -C /opt
+      tar -vxf loongarch64-clfs-5.0-cross-tools-gcc-full.tar.xz -C /opt
 
     Config cross-tools env.
 
@@ -60,5 +60,40 @@
 
     ./build/qemu-system-loongarch64 -machine virt -m 4G -cpu Loongson-3A5000 -smp 1 -kernel build/tests/tcg/loongarch64-softmmu/hello -monitor none -display none -chardev file,path=hello.out,id=output -serial chardev:output
 
+- Linux-user emulation
+
+  We already support Linux user emulation. We can use LoongArch cross-tools to build LoongArch executables on X86 machines,
+  and We can also use qemu-loongarch64 to run LoongArch executables.
+
+  1. Config cross-tools env.
+
+     see System emulation.
+
+  2. Test tests/tcg/multiarch.
+
+     ./configure  --static  --prefix=/usr  --disable-werror --target-list="loongarch64-linux-user" --enable-debug
+
+     cd build
+
+     make && make check-tcg
+
+  3. Run LoongArch system basic command with loongarch-clfs-system.
+
+     - Config clfs env.
+
+       wget https://github.com/loongson/build-tools/releases/download/2022.05.29/loongarch64-clfs-system-5.0.tar.bz2
+
+       tar -vxf loongarch64-clfs-system-5.0.tar.bz2 -C /opt/clfs
+
+       cp /opt/clfs/lib64/ld-linux-loongarch-lp64d.so.1  /lib64
+
+       export LD_LIBRARY_PATH="/opt/clfs/lib64"
+
+     - Run LoongArch system basic command.
+
+       ./qemu-loongarch64  /opt/clfs/usr/bin/bash
+       ./qemu-loongarch64  /opt/clfs/usr/bin/ls
+       ./qemu-loongarch64  /opt/clfs/usr/bin/pwd
+
 - Note.
   We can get the latest LoongArch documents or LoongArch tools at https://github.com/loongson/
-- 
2.34.1

[PULL 14/23] hw/intc/loongarch_pch_msi: Fix msi vector convertion

[Richard Henderson]

From: Mao Bibo <maobibo@loongson.cn>

Loongarch pch msi intc connects to extioi controller, the range of irq
number is 64-255.  Add a property for irqbase, so that we can compute
the irq offset from the view of pch_msi controller with the method:

  msi vector (from view of upper extioi intc) - irqbase

Signed-off-by: Mao Bibo <maobibo@loongson.cn>
Message-Id: <20220701030740.2469162-1-maobibo@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 include/hw/intc/loongarch_pch_msi.h |  2 ++
 hw/intc/loongarch_pch_msi.c         | 22 ++++++++++++++++++++--
 hw/loongarch/loongson3.c            |  1 +
 3 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/include/hw/intc/loongarch_pch_msi.h b/include/hw/intc/loongarch_pch_msi.h
index f668bfca7a..6d67560dea 100644
--- a/include/hw/intc/loongarch_pch_msi.h
+++ b/include/hw/intc/loongarch_pch_msi.h
@@ -17,4 +17,6 @@ struct LoongArchPCHMSI {
     SysBusDevice parent_obj;
     qemu_irq pch_msi_irq[PCH_MSI_IRQ_NUM];
     MemoryRegion msi_mmio;
+    /* irq base passed to upper extioi intc */
+    unsigned int irq_base;
 };
diff --git a/hw/intc/loongarch_pch_msi.c b/hw/intc/loongarch_pch_msi.c
index 74bcdbdb48..b36d6d76e4 100644
--- a/hw/intc/loongarch_pch_msi.c
+++ b/hw/intc/loongarch_pch_msi.c
@@ -23,9 +23,14 @@ static uint64_t loongarch_msi_mem_read(void *opaque, hwaddr addr, unsigned size)
 static void loongarch_msi_mem_write(void *opaque, hwaddr addr,
                                     uint64_t val, unsigned size)
 {
-    LoongArchPCHMSI *s = LOONGARCH_PCH_MSI(opaque);
-    int irq_num = val & 0xff;
+    LoongArchPCHMSI *s = (LoongArchPCHMSI *)opaque;
+    int irq_num;
 
+    /*
+     * vector number is irq number from upper extioi intc
+     * need subtract irq base to get msi vector offset
+     */
+    irq_num = (val & 0xff) - s->irq_base;
     trace_loongarch_msi_set_irq(irq_num);
     assert(irq_num < PCH_MSI_IRQ_NUM);
     qemu_set_irq(s->pch_msi_irq[irq_num], 1);
@@ -58,11 +63,24 @@ static void loongarch_pch_msi_init(Object *obj)
     qdev_init_gpio_in(DEVICE(obj), pch_msi_irq_handler, PCH_MSI_IRQ_NUM);
 }
 
+static Property loongarch_msi_properties[] = {
+    DEFINE_PROP_UINT32("msi_irq_base", LoongArchPCHMSI, irq_base, 0),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static void loongarch_pch_msi_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+
+    device_class_set_props(dc, loongarch_msi_properties);
+}
+
 static const TypeInfo loongarch_pch_msi_info = {
     .name          = TYPE_LOONGARCH_PCH_MSI,
     .parent        = TYPE_SYS_BUS_DEVICE,
     .instance_size = sizeof(LoongArchPCHMSI),
     .instance_init = loongarch_pch_msi_init,
+    .class_init    = loongarch_pch_msi_class_init,
 };
 
 static void loongarch_pch_msi_register_types(void)
diff --git a/hw/loongarch/loongson3.c b/hw/loongarch/loongson3.c
index bd20ebbb78..403dd91e11 100644
--- a/hw/loongarch/loongson3.c
+++ b/hw/loongarch/loongson3.c
@@ -267,6 +267,7 @@ static void loongarch_irq_init(LoongArchMachineState *lams)
     }
 
     pch_msi = qdev_new(TYPE_LOONGARCH_PCH_MSI);
+    qdev_prop_set_uint32(pch_msi, "msi_irq_base", PCH_MSI_IRQ_START);
     d = SYS_BUS_DEVICE(pch_msi);
     sysbus_realize_and_unref(d, &error_fatal);
     sysbus_mmio_map(d, 0, LS7A_PCH_MSI_ADDR_LOW);
-- 
2.34.1

[PULL 15/23] hw/rtc/ls7a_rtc: Fix uninitialied bugs and toymatch writing function

[Richard Henderson]

From: Xiaojuan Yang <yangxiaojuan@loongson.cn>

1. Initialize the tm struct in toymatch_write() and ls7a_toy_start() to
   fix uninitialized bugs.
2. Fix toymatch_val_to_time function. By the document, when we calculate
   the expiration year, we should first get current year, and replace the
   0-5 bits with toymatch's 26-31 bits.

Fixes: Coverity CID 1489766, 1489763

Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220701093407.2150607-2-yangxiaojuan@loongson.cn>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 hw/rtc/ls7a_rtc.c | 20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

diff --git a/hw/rtc/ls7a_rtc.c b/hw/rtc/ls7a_rtc.c
index fe6710310f..b88a90de8b 100644
--- a/hw/rtc/ls7a_rtc.c
+++ b/hw/rtc/ls7a_rtc.c
@@ -148,8 +148,9 @@ static inline uint64_t toy_time_to_val_year(struct tm tm)
     return year;
 }
 
-static inline void toymatch_val_to_time(uint64_t val, struct tm *tm)
+static inline void toymatch_val_to_time(LS7ARtcState *s, uint64_t val, struct tm *tm)
 {
+    qemu_get_timedate(tm, s->offset_toy);
     tm->tm_sec = FIELD_EX32(val, TOY_MATCH, SEC);
     tm->tm_min = FIELD_EX32(val, TOY_MATCH, MIN);
     tm->tm_hour = FIELD_EX32(val, TOY_MATCH, HOUR);
@@ -158,17 +159,18 @@ static inline void toymatch_val_to_time(uint64_t val, struct tm *tm)
     tm->tm_year += (FIELD_EX32(val, TOY_MATCH, YEAR) - (tm->tm_year & 0x3f));
 }
 
-static void toymatch_write(LS7ARtcState *s, struct tm *tm, uint64_t val, int num)
+static void toymatch_write(LS7ARtcState *s, uint64_t val, int num)
 {
     int64_t now, expire_time;
+    struct tm tm = {};
 
     /* it do not support write when toy disabled */
     if (toy_enabled(s)) {
         s->toymatch[num] = val;
         /* caculate expire time */
         now = qemu_clock_get_ms(rtc_clock);
-        toymatch_val_to_time(val, tm);
-        expire_time = now + (qemu_timedate_diff(tm) - s->offset_toy) * 1000;
+        toymatch_val_to_time(s, val, &tm);
+        expire_time = now + (qemu_timedate_diff(&tm) - s->offset_toy) * 1000;
         timer_mod(s->toy_timer[num], expire_time);
     }
 }
@@ -223,7 +225,7 @@ static void ls7a_toy_start(LS7ARtcState *s)
 {
     int i;
     uint64_t expire_time, now;
-    struct tm tm;
+    struct tm tm = {};
     /*
      * need to recaculate toy offset
      * and expire time when enable it.
@@ -236,7 +238,7 @@ static void ls7a_toy_start(LS7ARtcState *s)
 
     /* recaculate expire time and enable timer */
     for (i = 0; i < TIMER_NUMS; i++) {
-        toymatch_val_to_time(s->toymatch[i], &tm);
+        toymatch_val_to_time(s, s->toymatch[i], &tm);
         expire_time = now + (qemu_timedate_diff(&tm) - s->offset_toy) * 1000;
         timer_mod(s->toy_timer[i], expire_time);
     }
@@ -352,13 +354,13 @@ static void ls7a_rtc_write(void *opaque, hwaddr addr,
         }
         break;
     case SYS_TOYMATCH0:
-        toymatch_write(s, &tm, val, 0);
+        toymatch_write(s, val, 0);
         break;
     case SYS_TOYMATCH1:
-        toymatch_write(s, &tm, val, 1);
+        toymatch_write(s, val, 1);
         break;
     case SYS_TOYMATCH2:
-        toymatch_write(s, &tm, val, 2);
+        toymatch_write(s, val, 2);
         break;
     case SYS_RTCCTRL:
         /* get old ctrl */
-- 
2.34.1

[PULL 16/23] hw/rtc/ls7a_rtc: Fix timer call back function

[Richard Henderson]

From: Xiaojuan Yang <yangxiaojuan@loongson.cn>

Replace qemu_irq_pulse with qemu_irq_raise in ls7a_timer_cb function
to keep consistent with hardware behavior when raise irq.

Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220701093407.2150607-3-yangxiaojuan@loongson.cn>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 hw/rtc/ls7a_rtc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/hw/rtc/ls7a_rtc.c b/hw/rtc/ls7a_rtc.c
index b88a90de8b..780144b9da 100644
--- a/hw/rtc/ls7a_rtc.c
+++ b/hw/rtc/ls7a_rtc.c
@@ -425,7 +425,7 @@ static void toy_timer_cb(void *opaque)
     LS7ARtcState *s = opaque;
 
     if (toy_enabled(s)) {
-        qemu_irq_pulse(s->irq);
+        qemu_irq_raise(s->irq);
     }
 }
 
@@ -434,7 +434,7 @@ static void rtc_timer_cb(void *opaque)
     LS7ARtcState *s = opaque;
 
     if (rtc_enabled(s)) {
-        qemu_irq_pulse(s->irq);
+        qemu_irq_raise(s->irq);
     }
 }
 
-- 
2.34.1

[PULL 17/23] hw/rtc/ls7a_rtc: Remove unimplemented device in realized function

[Richard Henderson]

From: Xiaojuan Yang <yangxiaojuan@loongson.cn>

Remove the unimplemented device when realized ls7a RTC, as it is not uesd.

Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220701093407.2150607-4-yangxiaojuan@loongson.cn>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 hw/rtc/ls7a_rtc.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/hw/rtc/ls7a_rtc.c b/hw/rtc/ls7a_rtc.c
index 780144b9da..f1e7a660e9 100644
--- a/hw/rtc/ls7a_rtc.c
+++ b/hw/rtc/ls7a_rtc.c
@@ -461,7 +461,6 @@ static void ls7a_rtc_realize(DeviceState *dev, Error **errp)
     d->save_toy_year = 0;
     d->save_rtc = 0;
 
-    create_unimplemented_device("mmio fallback 1", 0x10013ffc, 0x4);
 }
 
 static int ls7a_rtc_pre_save(void *opaque)
-- 
2.34.1

[PULL 18/23] hw/rtc/ls7a_rtc: Add reset function

[Richard Henderson]

From: Xiaojuan Yang <yangxiaojuan@loongson.cn>

Add ls7a rtc reset function to delete timers and clear regs when rtc reset.

Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn>
Message-Id: <20220701093407.2150607-5-yangxiaojuan@loongson.cn>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 hw/rtc/ls7a_rtc.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/hw/rtc/ls7a_rtc.c b/hw/rtc/ls7a_rtc.c
index f1e7a660e9..eb10cdb451 100644
--- a/hw/rtc/ls7a_rtc.c
+++ b/hw/rtc/ls7a_rtc.c
@@ -463,6 +463,25 @@ static void ls7a_rtc_realize(DeviceState *dev, Error **errp)
 
 }
 
+/* delete timer and clear reg when reset */
+static void ls7a_rtc_reset(DeviceState *dev)
+{
+    int i;
+    SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
+    LS7ARtcState *d = LS7A_RTC(sbd);
+    for (i = 0; i < TIMER_NUMS; i++) {
+        if (toy_enabled(d)) {
+            timer_del(d->toy_timer[i]);
+        }
+        if (rtc_enabled(d)) {
+            timer_del(d->rtc_timer[i]);
+        }
+        d->toymatch[i] = 0;
+        d->rtcmatch[i] = 0;
+    }
+    d->cntrctl = 0;
+}
+
 static int ls7a_rtc_pre_save(void *opaque)
 {
     LS7ARtcState *s = LS7A_RTC(opaque);
@@ -511,6 +530,7 @@ static void ls7a_rtc_class_init(ObjectClass *klass, void *data)
     DeviceClass *dc = DEVICE_CLASS(klass);
     dc->vmsd = &vmstate_ls7a_rtc;
     dc->realize = ls7a_rtc_realize;
+    dc->reset = ls7a_rtc_reset;
     dc->desc = "ls7a rtc";
 }
 
-- 
2.34.1

[PULL 19/23] hw/rtc/ls7a_rtc: Fix rtc enable and disable function

[Richard Henderson]

From: Xiaojuan Yang <yangxiaojuan@loongson.cn>

Fix ls7a rtc enable and disable function. When rtc disabled, it do
not support to read or write, but the real time is still continue,
so we need not neither save the time nor update the rtc offset.

Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220701093407.2150607-6-yangxiaojuan@loongson.cn>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 hw/rtc/ls7a_rtc.c | 60 ++++++-----------------------------------------
 1 file changed, 7 insertions(+), 53 deletions(-)

diff --git a/hw/rtc/ls7a_rtc.c b/hw/rtc/ls7a_rtc.c
index eb10cdb451..a36aeea9dd 100644
--- a/hw/rtc/ls7a_rtc.c
+++ b/hw/rtc/ls7a_rtc.c
@@ -72,9 +72,6 @@ struct LS7ARtcState {
      */
     int64_t offset_toy;
     int64_t offset_rtc;
-    uint64_t save_toy_mon;
-    uint64_t save_toy_year;
-    uint64_t save_rtc;
     int64_t data;
     int tidx;
     uint32_t toymatch[3];
@@ -140,14 +137,6 @@ static inline uint64_t toy_time_to_val_mon(struct tm tm)
     return val;
 }
 
-static inline uint64_t toy_time_to_val_year(struct tm tm)
-{
-    uint64_t year;
-
-    year = tm.tm_year;
-    return year;
-}
-
 static inline void toymatch_val_to_time(LS7ARtcState *s, uint64_t val, struct tm *tm)
 {
     qemu_get_timedate(tm, s->offset_toy);
@@ -191,14 +180,6 @@ static void rtcmatch_write(LS7ARtcState *s, uint64_t val, int num)
 static void ls7a_toy_stop(LS7ARtcState *s)
 {
     int i;
-    struct tm tm;
-    /*
-     * save time when disabled toy,
-     * because toy time not add counters.
-     */
-    qemu_get_timedate(&tm, s->offset_toy);
-    s->save_toy_mon = toy_time_to_val_mon(tm);
-    s->save_toy_year = toy_time_to_val_year(tm);
 
     /* delete timers, and when re-enabled, recaculate expire time */
     for (i = 0; i < TIMER_NUMS; i++) {
@@ -209,11 +190,6 @@ static void ls7a_toy_stop(LS7ARtcState *s)
 static void ls7a_rtc_stop(LS7ARtcState *s)
 {
     int i;
-    uint64_t time;
-
-    /* save rtc time */
-    time = ls7a_rtc_ticks() + s->offset_rtc;
-    s->save_rtc = time;
 
     /* delete timers, and when re-enabled, recaculate expire time */
     for (i = 0; i < TIMER_NUMS; i++) {
@@ -226,14 +202,7 @@ static void ls7a_toy_start(LS7ARtcState *s)
     int i;
     uint64_t expire_time, now;
     struct tm tm = {};
-    /*
-     * need to recaculate toy offset
-     * and expire time when enable it.
-     */
-    toy_val_to_time_mon(s->save_toy_mon, &tm);
-    toy_val_to_time_year(s->save_toy_year, &tm);
 
-    s->offset_toy = qemu_timedate_diff(&tm);
     now = qemu_clock_get_ms(rtc_clock);
 
     /* recaculate expire time and enable timer */
@@ -247,14 +216,7 @@ static void ls7a_toy_start(LS7ARtcState *s)
 static void ls7a_rtc_start(LS7ARtcState *s)
 {
     int i;
-    uint64_t expire_time, now;
-
-    /*
-     * need to recaculate rtc offset
-     * and expire time when enable it.
-     */
-    now = ls7a_rtc_ticks();
-    s->offset_rtc = s->save_rtc - now;
+    uint64_t expire_time;
 
     /* recaculate expire time and enable timer */
     for (i = 0; i < TIMER_NUMS; i++) {
@@ -271,23 +233,21 @@ static uint64_t ls7a_rtc_read(void *opaque, hwaddr addr, unsigned size)
 
     switch (addr) {
     case SYS_TOYREAD0:
-        /* if toy disabled, read save toy time */
         if (toy_enabled(s)) {
             qemu_get_timedate(&tm, s->offset_toy);
             val = toy_time_to_val_mon(tm);
         } else {
-            /* read save mon val */
-            val = s->save_toy_mon;
+            /* return 0 when toy disabled */
+            val = 0;
         }
         break;
     case SYS_TOYREAD1:
-        /* if toy disabled, read save toy time */
         if (toy_enabled(s)) {
             qemu_get_timedate(&tm, s->offset_toy);
             val = tm.tm_year;
         } else {
-            /* read save year val */
-            val = s->save_toy_year;
+            /* return 0 when toy disabled */
+            val = 0;
         }
         break;
     case SYS_TOYMATCH0:
@@ -303,11 +263,11 @@ static uint64_t ls7a_rtc_read(void *opaque, hwaddr addr, unsigned size)
         val = s->cntrctl;
         break;
     case SYS_RTCREAD0:
-        /* if rtc disabled, read save rtc time */
         if (rtc_enabled(s)) {
             val = ls7a_rtc_ticks() + s->offset_rtc;
         } else {
-            val = s->save_rtc;
+            /* return 0 when rtc disabled */
+            val = 0;
         }
         break;
     case SYS_RTCMATCH0:
@@ -457,9 +417,6 @@ static void ls7a_rtc_realize(DeviceState *dev, Error **errp)
     }
     d->offset_toy = 0;
     d->offset_rtc = 0;
-    d->save_toy_mon = 0;
-    d->save_toy_year = 0;
-    d->save_rtc = 0;
 
 }
 
@@ -515,9 +472,6 @@ static const VMStateDescription vmstate_ls7a_rtc = {
     .fields = (VMStateField[]) {
         VMSTATE_INT64(offset_toy, LS7ARtcState),
         VMSTATE_INT64(offset_rtc, LS7ARtcState),
-        VMSTATE_UINT64(save_toy_mon, LS7ARtcState),
-        VMSTATE_UINT64(save_toy_year, LS7ARtcState),
-        VMSTATE_UINT64(save_rtc, LS7ARtcState),
         VMSTATE_UINT32_ARRAY(toymatch, LS7ARtcState, TIMER_NUMS),
         VMSTATE_UINT32_ARRAY(rtcmatch, LS7ARtcState, TIMER_NUMS),
         VMSTATE_UINT32(cntrctl, LS7ARtcState),
-- 
2.34.1

[PULL 20/23] hw/rtc/ls7a_rtc: Use tm struct pointer as arguments in toy_time_to_val()

[Richard Henderson]

From: Xiaojuan Yang <yangxiaojuan@loongson.cn>

Use pointer as arguments in toy_time_to_val() instead of struct tm.

Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220701093407.2150607-7-yangxiaojuan@loongson.cn>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 hw/rtc/ls7a_rtc.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/hw/rtc/ls7a_rtc.c b/hw/rtc/ls7a_rtc.c
index a36aeea9dd..85cd2d22a5 100644
--- a/hw/rtc/ls7a_rtc.c
+++ b/hw/rtc/ls7a_rtc.c
@@ -125,15 +125,15 @@ static inline void toy_val_to_time_year(uint64_t toy_year, struct tm *tm)
 }
 
 /* parse struct tm to toy value */
-static inline uint64_t toy_time_to_val_mon(struct tm tm)
+static inline uint64_t toy_time_to_val_mon(struct tm *tm)
 {
     uint64_t val = 0;
 
-    val = FIELD_DP32(val, TOY, MON, tm.tm_mon + 1);
-    val = FIELD_DP32(val, TOY, DAY, tm.tm_mday);
-    val = FIELD_DP32(val, TOY, HOUR, tm.tm_hour);
-    val = FIELD_DP32(val, TOY, MIN, tm.tm_min);
-    val = FIELD_DP32(val, TOY, SEC, tm.tm_sec);
+    val = FIELD_DP32(val, TOY, MON, tm->tm_mon + 1);
+    val = FIELD_DP32(val, TOY, DAY, tm->tm_mday);
+    val = FIELD_DP32(val, TOY, HOUR, tm->tm_hour);
+    val = FIELD_DP32(val, TOY, MIN, tm->tm_min);
+    val = FIELD_DP32(val, TOY, SEC, tm->tm_sec);
     return val;
 }
 
@@ -235,7 +235,7 @@ static uint64_t ls7a_rtc_read(void *opaque, hwaddr addr, unsigned size)
     case SYS_TOYREAD0:
         if (toy_enabled(s)) {
             qemu_get_timedate(&tm, s->offset_toy);
-            val = toy_time_to_val_mon(tm);
+            val = toy_time_to_val_mon(&tm);
         } else {
             /* return 0 when toy disabled */
             val = 0;
-- 
2.34.1

[PULL 21/23] hw/rtc/ls7a_rtc: Fix 'calculate' spelling errors

[Richard Henderson]

From: Xiaojuan Yang <yangxiaojuan@loongson.cn>

Fix 'calculate' spelling errors.

Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220701093407.2150607-8-yangxiaojuan@loongson.cn>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 hw/rtc/ls7a_rtc.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/hw/rtc/ls7a_rtc.c b/hw/rtc/ls7a_rtc.c
index 85cd2d22a5..e8b75701e4 100644
--- a/hw/rtc/ls7a_rtc.c
+++ b/hw/rtc/ls7a_rtc.c
@@ -156,7 +156,7 @@ static void toymatch_write(LS7ARtcState *s, uint64_t val, int num)
     /* it do not support write when toy disabled */
     if (toy_enabled(s)) {
         s->toymatch[num] = val;
-        /* caculate expire time */
+        /* calculate expire time */
         now = qemu_clock_get_ms(rtc_clock);
         toymatch_val_to_time(s, val, &tm);
         expire_time = now + (qemu_timedate_diff(&tm) - s->offset_toy) * 1000;
@@ -171,7 +171,7 @@ static void rtcmatch_write(LS7ARtcState *s, uint64_t val, int num)
     /* it do not support write when toy disabled */
     if (rtc_enabled(s)) {
         s->rtcmatch[num] = val;
-        /* caculate expire time */
+        /* calculate expire time */
         expire_ns = ticks_to_ns(val) - ticks_to_ns(s->offset_rtc);
         timer_mod_ns(s->rtc_timer[num], expire_ns);
     }
@@ -181,7 +181,7 @@ static void ls7a_toy_stop(LS7ARtcState *s)
 {
     int i;
 
-    /* delete timers, and when re-enabled, recaculate expire time */
+    /* delete timers, and when re-enabled, recalculate expire time */
     for (i = 0; i < TIMER_NUMS; i++) {
         timer_del(s->toy_timer[i]);
     }
@@ -191,7 +191,7 @@ static void ls7a_rtc_stop(LS7ARtcState *s)
 {
     int i;
 
-    /* delete timers, and when re-enabled, recaculate expire time */
+    /* delete timers, and when re-enabled, recalculate expire time */
     for (i = 0; i < TIMER_NUMS; i++) {
         timer_del(s->rtc_timer[i]);
     }
@@ -205,7 +205,7 @@ static void ls7a_toy_start(LS7ARtcState *s)
 
     now = qemu_clock_get_ms(rtc_clock);
 
-    /* recaculate expire time and enable timer */
+    /* recalculate expire time and enable timer */
     for (i = 0; i < TIMER_NUMS; i++) {
         toymatch_val_to_time(s, s->toymatch[i], &tm);
         expire_time = now + (qemu_timedate_diff(&tm) - s->offset_toy) * 1000;
@@ -218,7 +218,7 @@ static void ls7a_rtc_start(LS7ARtcState *s)
     int i;
     uint64_t expire_time;
 
-    /* recaculate expire time and enable timer */
+    /* recalculate expire time and enable timer */
     for (i = 0; i < TIMER_NUMS; i++) {
         expire_time = ticks_to_ns(s->rtcmatch[i]) - ticks_to_ns(s->offset_rtc);
         timer_mod_ns(s->rtc_timer[i], expire_time);
-- 
2.34.1

[PULL 22/23] target/loongarch: Fix the meaning of ECFG reg's VS field

[Richard Henderson]

From: Xiaojuan Yang <yangxiaojuan@loongson.cn>

By the manual of LoongArch CSR, the VS field(18:16 bits) of
ECFG reg means that the number of instructions between each
exception entry is 2^VS.

Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220701093407.2150607-9-yangxiaojuan@loongson.cn>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/loongarch/cpu.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/target/loongarch/cpu.c b/target/loongarch/cpu.c
index 47c0bdd1ac..d2d4667a34 100644
--- a/target/loongarch/cpu.c
+++ b/target/loongarch/cpu.c
@@ -223,6 +223,10 @@ static void loongarch_cpu_do_interrupt(CPUState *cs)
     env->CSR_CRMD = FIELD_DP64(env->CSR_CRMD, CSR_CRMD, PLV, 0);
     env->CSR_CRMD = FIELD_DP64(env->CSR_CRMD, CSR_CRMD, IE, 0);
 
+    if (vec_size) {
+        vec_size = (1 << vec_size) * 4;
+    }
+
     if  (cs->exception_index == EXCCODE_INT) {
         /* Interrupt */
         uint32_t vector = 0;
-- 
2.34.1

[PULL 23/23] target/loongarch: Add lock when writing timer clear reg

[Richard Henderson]

From: Xiaojuan Yang <yangxiaojuan@loongson.cn>

There is such error info when running linux kernel:
    tcg_handle_interrupt: assertion failed: (qemu_mutex_iothread_locked()).
    calling stack:
    #0 in raise () at /lib64/libc.so.6
    #1 in abort () at /lib64/libc.so.6
    #2 in g_assertion_message_expr.cold () at /lib64/libglib-2.0.so.0
    #3 in g_assertion_message_expr () at /lib64/libglib-2.0.so.0
    #4 in tcg_handle_interrupt (cpu=0x632000030800, mask=2) at ../accel/tcg/tcg-accel-ops.c:79
    #5 in cpu_interrupt (cpu=0x632000030800, mask=2) at ../softmmu/cpus.c:248
    #6 in loongarch_cpu_set_irq (opaque=0x632000030800, irq=11, level=0)
       at ../target/loongarch/cpu.c:100
    #7 in helper_csrwr_ticlr (env=0x632000039440, val=1) at ../target/loongarch/csr_helper.c:85
    #8 in code_gen_buffer ()
    #9 in cpu_tb_exec (cpu=0x632000030800, itb=0x7fff946ac280, tb_exit=0x7ffe4fcb6c30)
       at ../accel/tcg/cpu-exec.c:358

Add mutex iothread lock around loongarch_cpu_set_irq in csrwr_ticlr() to
fix the bug.

Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220701093407.2150607-10-yangxiaojuan@loongson.cn>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/loongarch/csr_helper.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/target/loongarch/csr_helper.c b/target/loongarch/csr_helper.c
index 24a9389364..7e02787895 100644
--- a/target/loongarch/csr_helper.c
+++ b/target/loongarch/csr_helper.c
@@ -81,7 +81,9 @@ target_ulong helper_csrwr_ticlr(CPULoongArchState *env, target_ulong val)
     int64_t old_v = 0;
 
     if (val & 0x1) {
+        qemu_mutex_lock_iothread();
         loongarch_cpu_set_irq(cpu, IRQ_TIMER, 0);
+        qemu_mutex_unlock_iothread();
     }
     return old_v;
 }
-- 
2.34.1

Re: [PULL 00/23] loongarch64 patch queue

[Richard Henderson]

On 7/4/22 15:03, Richard Henderson wrote:
> The following changes since commit e8e86b484eac70cd86e15fa10a2f0038a536cbba:
> 
>    Merge tag 'pull-riscv-to-apply-20220703-1' of github.com:alistair23/qemu into staging (2022-07-03 06:29:02 +0530)
> 
> are available in the Git repository at:
> 
>    https://gitlab.com/rth7680/qemu.git tags/pull-la-20220704
> 
> for you to fetch changes up to eb1e9ff8bba91674b4321f2b075c55aa8d9948cc:
> 
>    target/loongarch: Add lock when writing timer clear reg (2022-07-04 11:08:58 +0530)
> 
> ----------------------------------------------------------------
> LoongArch patch queue:
>    Support linux-user.
>    Fixes for CSR BADV.
>    Fix ASRT{LE,GT} exception.
>    Fixes for LS7A RTC.
>    Fix for interrupt vector spacing.

Applied, thanks.  Please update https://wiki.qemu.org/ChangeLog/7.1 as appropriate.


r~


> 
> ----------------------------------------------------------------
> Mao Bibo (1):
>        hw/intc/loongarch_pch_msi: Fix msi vector convertion
> 
> Song Gao (13):
>        linux-user: Add LoongArch generic header files
>        linux-user: Add LoongArch signal support
>        linux-user: Add LoongArch elf support
>        linux-user: Add LoongArch syscall support
>        linux-user: Add LoongArch cpu_loop support
>        scripts: add loongarch64 binfmt config
>        target/loongarch: remove badaddr from CPULoongArch
>        target/loongarch: Fix missing update CSR_BADV
>        target/loongarch: Fix helper_asrtle_d/asrtgt_d raise wrong exception
>        target/loongarch: remove unused include hw/loader.h
>        target/loongarch: Adjust functions and structure to support user-mode
>        default-configs: Add loongarch linux-user support
>        target/loongarch: Update README
> 
> Xiaojuan Yang (9):
>        hw/rtc/ls7a_rtc: Fix uninitialied bugs and toymatch writing function
>        hw/rtc/ls7a_rtc: Fix timer call back function
>        hw/rtc/ls7a_rtc: Remove unimplemented device in realized function
>        hw/rtc/ls7a_rtc: Add reset function
>        hw/rtc/ls7a_rtc: Fix rtc enable and disable function
>        hw/rtc/ls7a_rtc: Use tm struct pointer as arguments in toy_time_to_val()
>        hw/rtc/ls7a_rtc: Fix 'calculate' spelling errors
>        target/loongarch: Fix the meaning of ECFG reg's VS field
>        target/loongarch: Add lock when writing timer clear reg
> 
>   configs/targets/loongarch64-linux-user.mak         |   3 +
>   include/hw/intc/loongarch_pch_msi.h                |   2 +
>   linux-user/loongarch64/sockbits.h                  |  11 +
>   linux-user/loongarch64/syscall_nr.h                | 312 +++++++++++++++++++
>   linux-user/loongarch64/target_cpu.h                |  34 +++
>   linux-user/loongarch64/target_elf.h                |  12 +
>   linux-user/loongarch64/target_errno_defs.h         |  12 +
>   linux-user/loongarch64/target_fcntl.h              |  11 +
>   linux-user/loongarch64/target_prctl.h              |   1 +
>   linux-user/loongarch64/target_resource.h           |  11 +
>   linux-user/loongarch64/target_signal.h             |  13 +
>   linux-user/loongarch64/target_structs.h            |  11 +
>   linux-user/loongarch64/target_syscall.h            |  48 +++
>   linux-user/loongarch64/termbits.h                  |  11 +
>   linux-user/syscall_defs.h                          |   6 +-
>   target/loongarch/cpu.h                             |   8 +-
>   target/loongarch/helper.h                          |   2 +
>   target/loongarch/internals.h                       |   2 +
>   hw/intc/loongarch_pch_msi.c                        |  22 +-
>   hw/loongarch/loongson3.c                           |   1 +
>   hw/rtc/ls7a_rtc.c                                  | 131 ++++----
>   linux-user/elfload.c                               |  91 ++++++
>   linux-user/loongarch64/cpu_loop.c                  |  96 ++++++
>   linux-user/loongarch64/signal.c                    | 335 +++++++++++++++++++++
>   target/loongarch/cpu.c                             |  38 ++-
>   target/loongarch/csr_helper.c                      |   2 +
>   target/loongarch/gdbstub.c                         |   2 +-
>   target/loongarch/op_helper.c                       |  10 +-
>   target/loongarch/insn_trans/trans_privileged.c.inc |  36 +++
>   scripts/gensyscalls.sh                             |   2 +
>   scripts/qemu-binfmt-conf.sh                        |   6 +-
>   target/loongarch/README                            |  39 ++-
>   32 files changed, 1226 insertions(+), 95 deletions(-)
>   create mode 100644 configs/targets/loongarch64-linux-user.mak
>   create mode 100644 linux-user/loongarch64/sockbits.h
>   create mode 100644 linux-user/loongarch64/syscall_nr.h
>   create mode 100644 linux-user/loongarch64/target_cpu.h
>   create mode 100644 linux-user/loongarch64/target_elf.h
>   create mode 100644 linux-user/loongarch64/target_errno_defs.h
>   create mode 100644 linux-user/loongarch64/target_fcntl.h
>   create mode 100644 linux-user/loongarch64/target_prctl.h
>   create mode 100644 linux-user/loongarch64/target_resource.h
>   create mode 100644 linux-user/loongarch64/target_signal.h
>   create mode 100644 linux-user/loongarch64/target_structs.h
>   create mode 100644 linux-user/loongarch64/target_syscall.h
>   create mode 100644 linux-user/loongarch64/termbits.h
>   create mode 100644 linux-user/loongarch64/cpu_loop.c
>   create mode 100644 linux-user/loongarch64/signal.c

Re: [PULL 00/23] loongarch64 patch queue

[Thomas Huth]

On 04/07/2022 17.16, Richard Henderson wrote:
> On 7/4/22 15:03, Richard Henderson wrote:
>> The following changes since commit e8e86b484eac70cd86e15fa10a2f0038a536cbba:
>>
>>    Merge tag 'pull-riscv-to-apply-20220703-1' of 
>> github.com:alistair23/qemu into staging (2022-07-03 06:29:02 +0530)
>>
>> are available in the Git repository at:
>>
>>    https://gitlab.com/rth7680/qemu.git tags/pull-la-20220704
>>
>> for you to fetch changes up to eb1e9ff8bba91674b4321f2b075c55aa8d9948cc:
>>
>>    target/loongarch: Add lock when writing timer clear reg (2022-07-04 
>> 11:08:58 +0530)
>>
>> ----------------------------------------------------------------
>> LoongArch patch queue:
>>    Support linux-user.
>>    Fixes for CSR BADV.
>>    Fix ASRT{LE,GT} exception.
>>    Fixes for LS7A RTC.
>>    Fix for interrupt vector spacing.
> 
> Applied, thanks.  Please update https://wiki.qemu.org/ChangeLog/7.1 as 
> appropriate.

  Hi Xiaojuan, hi Richard!

Seems like this is failing on FreeBSD:

https://gitlab.com/qemu-project/qemu/-/jobs/2675891548#L4076

Could you please have a look?

  Thanks,
   Thomas

Re: [PULL 00/23] loongarch64 patch queue

[Richard Henderson]

On 7/5/22 13:01, Thomas Huth wrote:
> On 04/07/2022 17.16, Richard Henderson wrote:
>> On 7/4/22 15:03, Richard Henderson wrote:
>>> The following changes since commit e8e86b484eac70cd86e15fa10a2f0038a536cbba:
>>>
>>>    Merge tag 'pull-riscv-to-apply-20220703-1' of github.com:alistair23/qemu into 
>>> staging (2022-07-03 06:29:02 +0530)
>>>
>>> are available in the Git repository at:
>>>
>>>    https://gitlab.com/rth7680/qemu.git tags/pull-la-20220704
>>>
>>> for you to fetch changes up to eb1e9ff8bba91674b4321f2b075c55aa8d9948cc:
>>>
>>>    target/loongarch: Add lock when writing timer clear reg (2022-07-04 11:08:58 +0530)
>>>
>>> ----------------------------------------------------------------
>>> LoongArch patch queue:
>>>    Support linux-user.
>>>    Fixes for CSR BADV.
>>>    Fix ASRT{LE,GT} exception.
>>>    Fixes for LS7A RTC.
>>>    Fix for interrupt vector spacing.
>>
>> Applied, thanks.  Please update https://wiki.qemu.org/ChangeLog/7.1 as appropriate.
> 
>   Hi Xiaojuan, hi Richard!
> 
> Seems like this is failing on FreeBSD:
> 
> https://gitlab.com/qemu-project/qemu/-/jobs/2675891548#L4076
> 
> Could you please have a look?

Ho hum.  That's what happens when you get so used to jobs failing, they fail for some 
other reason and it gets missed.  Will do.


r~

Re: [PULL 13/23] target/loongarch: Update README

[Philippe Mathieu-Daudé]

Hi Gao,

On 4/7/22 11:33, Richard Henderson wrote:
> From: Song Gao <gaosong@loongson.cn>
> 
> Add linux-user emulation introduction
> 
> Signed-off-by: Song Gao <gaosong@loongson.cn>
> Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn>
> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
> Message-Id: <20220624031049.1716097-14-gaosong@loongson.cn>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
>   target/loongarch/README | 39 +++++++++++++++++++++++++++++++++++++--
>   1 file changed, 37 insertions(+), 2 deletions(-)


> +- Linux-user emulation
> +
> +  We already support Linux user emulation. We can use LoongArch cross-tools to build LoongArch executables on X86 machines,
> +  and We can also use qemu-loongarch64 to run LoongArch executables.
> +
> +  1. Config cross-tools env.
> +
> +     see System emulation.
> +
> +  2. Test tests/tcg/multiarch.
> +
> +     ./configure  --static  --prefix=/usr  --disable-werror --target-list="loongarch64-linux-user" --enable-debug

Why are we recommending to build this particular target with
--disable-werror, what is the problem?

> +
> +     cd build
> +
> +     make && make check-tcg

Re: [PULL 13/23] target/loongarch: Update README

[gaosong]

[-- Attachment #1: Type: text/plain, Size: 738 bytes --]


在 2023/3/6 下午10:29, Philippe Mathieu-Daudé 写道:
>> +- Linux-user emulation
>> +
>> +  We already support Linux user emulation. We can use LoongArch 
>> cross-tools to build LoongArch executables on X86 machines,
>> +  and We can also use qemu-loongarch64 to run LoongArch executables.
>> +
>> +  1. Config cross-tools env.
>> +
>> +     see System emulation.
>> +
>> +  2. Test tests/tcg/multiarch.
>> +
>> +     ./configure  --static  --prefix=/usr  --disable-werror 
>> --target-list="loongarch64-linux-user" --enable-debug
>
> Why are we recommending to build this particular target with
> --disable-werror, what is the problem? 
This is copied from our old version code.  We need drop it.

Thanks.
Song Gao

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Re: [PULL 13/23] target/loongarch: Update README

[Philippe Mathieu-Daudé]

On 7/3/23 02:53, gaosong wrote:
> 
> 在 2023/3/6 下午10:29, Philippe Mathieu-Daudé 写道:
>>> +- Linux-user emulation
>>> +
>>> +  We already support Linux user emulation. We can use LoongArch 
>>> cross-tools to build LoongArch executables on X86 machines,
>>> +  and We can also use qemu-loongarch64 to run LoongArch executables.
>>> +
>>> +  1. Config cross-tools env.
>>> +
>>> +     see System emulation.
>>> +
>>> +  2. Test tests/tcg/multiarch.
>>> +
>>> +     ./configure  --static  --prefix=/usr  --disable-werror 
>>> --target-list="loongarch64-linux-user" --enable-debug
>>
>> Why are we recommending to build this particular target with
>> --disable-werror, what is the problem? 
> This is copied from our old version code.  We need drop it.

Ah OK, good then!

Thanks,

Phil.