* [PATCH 00/13] linux-user patch queue
@ 2023-08-24 1:02 Richard Henderson
2023-08-24 1:02 ` [PATCH 01/13] linux-user: Split out cpu/target_proc.h Richard Henderson
` (13 more replies)
0 siblings, 14 replies; 23+ messages in thread
From: Richard Henderson @ 2023-08-24 1:02 UTC (permalink / raw)
To: qemu-devel
Combine a bunch of smaller linux-user patches:
Supercedes: 20230801230842.414421-1-deller@gmx.de
("[PATCH v2 0/3] linux-user: /proc/cpuinfo fix and content emulation for arm")
Supercedes: 20230807122206.655701-1-iii@linux.ibm.com
("[PATCH v2] linux-user: Emulate the Anonymous: keyword in /proc/self/smaps")
Supercedes: 20230816181437.572997-1-richard.henderson@linaro.org
("[PATCH 0/6] linux-user: Rewrite open_self_maps")
Supercedes: 20230820204408.327348-1-richard.henderson@linaro.org
("[PATCH 0/4] linux-user: shmat/shmdt improvements")
with some additions. Patches needing review:
01-linux-user-Split-out-cpu-target_proc.h.patch
11-linux-user-Use-WITH_MMAP_LOCK_GUARD-in-target_-shmat.patch
12-linux-user-Fix-shmdt.patch
13-linux-user-Track-shm-regions-with-an-interval-tree.patch
r~
Helge Deller (2):
linux-user: Emulate /proc/cpuinfo on aarch64 and arm
linux-user: Emulate /proc/cpuinfo for Alpha
Ilya Leoshkevich (1):
linux-user: Emulate the Anonymous: keyword in /proc/self/smaps
Richard Henderson (10):
linux-user: Split out cpu/target_proc.h
util/selfmap: Use dev_t and ino_t in MapInfo
linux-user: Use walk_memory_regions for open_self_maps
linux-user: Adjust brk for load_bias
linux-user: Show heap address in /proc/pid/maps
linux-user: Remove ELF_START_MMAP and image_info.start_mmap
linux-user: Move shmat and shmdt implementations to mmap.c
linux-user: Use WITH_MMAP_LOCK_GUARD in target_{shmat,shmdt}
linux-user: Fix shmdt
linux-user: Track shm regions with an interval tree
include/qemu/selfmap.h | 4 +-
linux-user/aarch64/target_proc.h | 1 +
linux-user/alpha/target_proc.h | 67 ++++
linux-user/arm/target_proc.h | 101 ++++++
linux-user/cris/target_proc.h | 1 +
linux-user/hexagon/target_proc.h | 1 +
linux-user/hppa/target_proc.h | 26 ++
linux-user/i386/target_proc.h | 1 +
linux-user/loader.h | 6 +-
linux-user/loongarch64/target_proc.h | 1 +
linux-user/m68k/target_proc.h | 16 +
linux-user/microblaze/target_proc.h | 1 +
linux-user/mips/target_proc.h | 1 +
linux-user/mips64/target_proc.h | 1 +
linux-user/nios2/target_proc.h | 1 +
linux-user/openrisc/target_proc.h | 1 +
linux-user/ppc/target_proc.h | 1 +
linux-user/qemu.h | 1 -
linux-user/riscv/target_proc.h | 37 ++
linux-user/s390x/target_proc.h | 109 ++++++
linux-user/sh4/target_proc.h | 1 +
linux-user/sparc/target_proc.h | 16 +
linux-user/user-mmap.h | 4 +
linux-user/x86_64/target_proc.h | 1 +
linux-user/xtensa/target_proc.h | 1 +
linux-user/elfload.c | 170 ++++++---
linux-user/mmap.c | 168 +++++++++
linux-user/syscall.c | 514 +++++++--------------------
util/selfmap.c | 12 +-
29 files changed, 828 insertions(+), 437 deletions(-)
create mode 100644 linux-user/aarch64/target_proc.h
create mode 100644 linux-user/alpha/target_proc.h
create mode 100644 linux-user/arm/target_proc.h
create mode 100644 linux-user/cris/target_proc.h
create mode 100644 linux-user/hexagon/target_proc.h
create mode 100644 linux-user/hppa/target_proc.h
create mode 100644 linux-user/i386/target_proc.h
create mode 100644 linux-user/loongarch64/target_proc.h
create mode 100644 linux-user/m68k/target_proc.h
create mode 100644 linux-user/microblaze/target_proc.h
create mode 100644 linux-user/mips/target_proc.h
create mode 100644 linux-user/mips64/target_proc.h
create mode 100644 linux-user/nios2/target_proc.h
create mode 100644 linux-user/openrisc/target_proc.h
create mode 100644 linux-user/ppc/target_proc.h
create mode 100644 linux-user/riscv/target_proc.h
create mode 100644 linux-user/s390x/target_proc.h
create mode 100644 linux-user/sh4/target_proc.h
create mode 100644 linux-user/sparc/target_proc.h
create mode 100644 linux-user/x86_64/target_proc.h
create mode 100644 linux-user/xtensa/target_proc.h
--
2.34.1
^ permalink raw reply [flat|nested] 23+ messages in thread
* [PATCH 01/13] linux-user: Split out cpu/target_proc.h
2023-08-24 1:02 [PATCH 00/13] linux-user patch queue Richard Henderson
@ 2023-08-24 1:02 ` Richard Henderson
2023-09-01 14:35 ` Philippe Mathieu-Daudé
2023-08-24 1:02 ` [PATCH 02/13] linux-user: Emulate /proc/cpuinfo on aarch64 and arm Richard Henderson
` (12 subsequent siblings)
13 siblings, 1 reply; 23+ messages in thread
From: Richard Henderson @ 2023-08-24 1:02 UTC (permalink / raw)
To: qemu-devel
Move the various open_cpuinfo functions into new files.
Move the m68k open_hardware function as well.
All other guest architectures get a boilerplate empty file.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
linux-user/aarch64/target_proc.h | 1 +
linux-user/alpha/target_proc.h | 1 +
linux-user/arm/target_proc.h | 1 +
linux-user/cris/target_proc.h | 1 +
linux-user/hexagon/target_proc.h | 1 +
linux-user/hppa/target_proc.h | 26 ++++
linux-user/i386/target_proc.h | 1 +
linux-user/loongarch64/target_proc.h | 1 +
linux-user/m68k/target_proc.h | 16 +++
linux-user/microblaze/target_proc.h | 1 +
linux-user/mips/target_proc.h | 1 +
linux-user/mips64/target_proc.h | 1 +
linux-user/nios2/target_proc.h | 1 +
linux-user/openrisc/target_proc.h | 1 +
linux-user/ppc/target_proc.h | 1 +
linux-user/riscv/target_proc.h | 37 ++++++
linux-user/s390x/target_proc.h | 109 +++++++++++++++++
linux-user/sh4/target_proc.h | 1 +
linux-user/sparc/target_proc.h | 16 +++
linux-user/x86_64/target_proc.h | 1 +
linux-user/xtensa/target_proc.h | 1 +
linux-user/syscall.c | 176 +--------------------------
22 files changed, 226 insertions(+), 170 deletions(-)
create mode 100644 linux-user/aarch64/target_proc.h
create mode 100644 linux-user/alpha/target_proc.h
create mode 100644 linux-user/arm/target_proc.h
create mode 100644 linux-user/cris/target_proc.h
create mode 100644 linux-user/hexagon/target_proc.h
create mode 100644 linux-user/hppa/target_proc.h
create mode 100644 linux-user/i386/target_proc.h
create mode 100644 linux-user/loongarch64/target_proc.h
create mode 100644 linux-user/m68k/target_proc.h
create mode 100644 linux-user/microblaze/target_proc.h
create mode 100644 linux-user/mips/target_proc.h
create mode 100644 linux-user/mips64/target_proc.h
create mode 100644 linux-user/nios2/target_proc.h
create mode 100644 linux-user/openrisc/target_proc.h
create mode 100644 linux-user/ppc/target_proc.h
create mode 100644 linux-user/riscv/target_proc.h
create mode 100644 linux-user/s390x/target_proc.h
create mode 100644 linux-user/sh4/target_proc.h
create mode 100644 linux-user/sparc/target_proc.h
create mode 100644 linux-user/x86_64/target_proc.h
create mode 100644 linux-user/xtensa/target_proc.h
diff --git a/linux-user/aarch64/target_proc.h b/linux-user/aarch64/target_proc.h
new file mode 100644
index 0000000000..43fe29ca72
--- /dev/null
+++ b/linux-user/aarch64/target_proc.h
@@ -0,0 +1 @@
+/* No target-specific /proc support */
diff --git a/linux-user/alpha/target_proc.h b/linux-user/alpha/target_proc.h
new file mode 100644
index 0000000000..43fe29ca72
--- /dev/null
+++ b/linux-user/alpha/target_proc.h
@@ -0,0 +1 @@
+/* No target-specific /proc support */
diff --git a/linux-user/arm/target_proc.h b/linux-user/arm/target_proc.h
new file mode 100644
index 0000000000..43fe29ca72
--- /dev/null
+++ b/linux-user/arm/target_proc.h
@@ -0,0 +1 @@
+/* No target-specific /proc support */
diff --git a/linux-user/cris/target_proc.h b/linux-user/cris/target_proc.h
new file mode 100644
index 0000000000..43fe29ca72
--- /dev/null
+++ b/linux-user/cris/target_proc.h
@@ -0,0 +1 @@
+/* No target-specific /proc support */
diff --git a/linux-user/hexagon/target_proc.h b/linux-user/hexagon/target_proc.h
new file mode 100644
index 0000000000..43fe29ca72
--- /dev/null
+++ b/linux-user/hexagon/target_proc.h
@@ -0,0 +1 @@
+/* No target-specific /proc support */
diff --git a/linux-user/hppa/target_proc.h b/linux-user/hppa/target_proc.h
new file mode 100644
index 0000000000..9340c3b6af
--- /dev/null
+++ b/linux-user/hppa/target_proc.h
@@ -0,0 +1,26 @@
+/*
+ * HPPA specific proc functions for linux-user
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+#ifndef HPPA_TARGET_PROC_H
+#define HPPA_TARGET_PROC_H
+
+static int open_cpuinfo(CPUArchState *cpu_env, int fd)
+{
+ int i, num_cpus;
+
+ num_cpus = sysconf(_SC_NPROCESSORS_ONLN);
+ for (i = 0; i < num_cpus; i++) {
+ dprintf(fd, "processor\t: %d\n", i);
+ dprintf(fd, "cpu family\t: PA-RISC 1.1e\n");
+ dprintf(fd, "cpu\t\t: PA7300LC (PCX-L2)\n");
+ dprintf(fd, "capabilities\t: os32\n");
+ dprintf(fd, "model\t\t: 9000/778/B160L - "
+ "Merlin L2 160 QEMU (9000/778/B160L)\n\n");
+ }
+ return 0;
+}
+#define HAVE_ARCH_PROC_CPUINFO
+
+#endif /* HPPA_TARGET_PROC_H */
diff --git a/linux-user/i386/target_proc.h b/linux-user/i386/target_proc.h
new file mode 100644
index 0000000000..43fe29ca72
--- /dev/null
+++ b/linux-user/i386/target_proc.h
@@ -0,0 +1 @@
+/* No target-specific /proc support */
diff --git a/linux-user/loongarch64/target_proc.h b/linux-user/loongarch64/target_proc.h
new file mode 100644
index 0000000000..43fe29ca72
--- /dev/null
+++ b/linux-user/loongarch64/target_proc.h
@@ -0,0 +1 @@
+/* No target-specific /proc support */
diff --git a/linux-user/m68k/target_proc.h b/linux-user/m68k/target_proc.h
new file mode 100644
index 0000000000..3df8f28e22
--- /dev/null
+++ b/linux-user/m68k/target_proc.h
@@ -0,0 +1,16 @@
+/*
+ * M68K specific proc functions for linux-user
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+#ifndef M68K_TARGET_PROC_H
+#define M68K_TARGET_PROC_H
+
+static int open_hardware(CPUArchState *cpu_env, int fd)
+{
+ dprintf(fd, "Model:\t\tqemu-m68k\n");
+ return 0;
+}
+#define HAVE_ARCH_PROC_HARDWARE
+
+#endif /* M68K_TARGET_PROC_H */
diff --git a/linux-user/microblaze/target_proc.h b/linux-user/microblaze/target_proc.h
new file mode 100644
index 0000000000..43fe29ca72
--- /dev/null
+++ b/linux-user/microblaze/target_proc.h
@@ -0,0 +1 @@
+/* No target-specific /proc support */
diff --git a/linux-user/mips/target_proc.h b/linux-user/mips/target_proc.h
new file mode 100644
index 0000000000..43fe29ca72
--- /dev/null
+++ b/linux-user/mips/target_proc.h
@@ -0,0 +1 @@
+/* No target-specific /proc support */
diff --git a/linux-user/mips64/target_proc.h b/linux-user/mips64/target_proc.h
new file mode 100644
index 0000000000..43fe29ca72
--- /dev/null
+++ b/linux-user/mips64/target_proc.h
@@ -0,0 +1 @@
+/* No target-specific /proc support */
diff --git a/linux-user/nios2/target_proc.h b/linux-user/nios2/target_proc.h
new file mode 100644
index 0000000000..43fe29ca72
--- /dev/null
+++ b/linux-user/nios2/target_proc.h
@@ -0,0 +1 @@
+/* No target-specific /proc support */
diff --git a/linux-user/openrisc/target_proc.h b/linux-user/openrisc/target_proc.h
new file mode 100644
index 0000000000..43fe29ca72
--- /dev/null
+++ b/linux-user/openrisc/target_proc.h
@@ -0,0 +1 @@
+/* No target-specific /proc support */
diff --git a/linux-user/ppc/target_proc.h b/linux-user/ppc/target_proc.h
new file mode 100644
index 0000000000..43fe29ca72
--- /dev/null
+++ b/linux-user/ppc/target_proc.h
@@ -0,0 +1 @@
+/* No target-specific /proc support */
diff --git a/linux-user/riscv/target_proc.h b/linux-user/riscv/target_proc.h
new file mode 100644
index 0000000000..c77c003d65
--- /dev/null
+++ b/linux-user/riscv/target_proc.h
@@ -0,0 +1,37 @@
+/*
+ * RISC-V specific proc functions for linux-user
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+#ifndef RISCV_TARGET_PROC_H
+#define RISCV_TARGET_PROC_H
+
+static int open_cpuinfo(CPUArchState *cpu_env, int fd)
+{
+ int i;
+ int num_cpus = sysconf(_SC_NPROCESSORS_ONLN);
+ RISCVCPU *cpu = env_archcpu(cpu_env);
+ const RISCVCPUConfig *cfg = riscv_cpu_cfg((CPURISCVState *) cpu_env);
+ char *isa_string = riscv_isa_string(cpu);
+ const char *mmu;
+
+ if (cfg->mmu) {
+ mmu = (cpu_env->xl == MXL_RV32) ? "sv32" : "sv48";
+ } else {
+ mmu = "none";
+ }
+
+ for (i = 0; i < num_cpus; i++) {
+ dprintf(fd, "processor\t: %d\n", i);
+ dprintf(fd, "hart\t\t: %d\n", i);
+ dprintf(fd, "isa\t\t: %s\n", isa_string);
+ dprintf(fd, "mmu\t\t: %s\n", mmu);
+ dprintf(fd, "uarch\t\t: qemu\n\n");
+ }
+
+ g_free(isa_string);
+ return 0;
+}
+#define HAVE_ARCH_PROC_CPUINFO
+
+#endif /* RISCV_TARGET_PROC_H */
diff --git a/linux-user/s390x/target_proc.h b/linux-user/s390x/target_proc.h
new file mode 100644
index 0000000000..a4a4821ea5
--- /dev/null
+++ b/linux-user/s390x/target_proc.h
@@ -0,0 +1,109 @@
+/*
+ * S390X specific proc functions for linux-user
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+#ifndef S390X_TARGET_PROC_H
+#define S390X_TARGET_PROC_H
+
+/*
+ * Emulate what a Linux kernel running in qemu-system-s390x -M accel=tcg would
+ * show in /proc/cpuinfo.
+ *
+ * Skip the following in order to match the missing support in op_ecag():
+ * - show_cacheinfo().
+ * - show_cpu_topology().
+ * - show_cpu_mhz().
+ *
+ * Use fixed values for certain fields:
+ * - bogomips per cpu - from a qemu-system-s390x run.
+ * - max thread id = 0, since SMT / SIGP_SET_MULTI_THREADING is not supported.
+ *
+ * Keep the code structure close to arch/s390/kernel/processor.c.
+ */
+
+static void show_facilities(int fd)
+{
+ size_t sizeof_stfl_bytes = 2048;
+ g_autofree uint8_t *stfl_bytes = g_new0(uint8_t, sizeof_stfl_bytes);
+ unsigned int bit;
+
+ dprintf(fd, "facilities :");
+ s390_get_feat_block(S390_FEAT_TYPE_STFL, stfl_bytes);
+ for (bit = 0; bit < sizeof_stfl_bytes * 8; bit++) {
+ if (test_be_bit(bit, stfl_bytes)) {
+ dprintf(fd, " %d", bit);
+ }
+ }
+ dprintf(fd, "\n");
+}
+
+static int cpu_ident(unsigned long n)
+{
+ return deposit32(0, CPU_ID_BITS - CPU_PHYS_ADDR_BITS, CPU_PHYS_ADDR_BITS,
+ n);
+}
+
+static void show_cpu_summary(CPUArchState *cpu_env, int fd)
+{
+ S390CPUModel *model = env_archcpu(cpu_env)->model;
+ int num_cpus = sysconf(_SC_NPROCESSORS_ONLN);
+ uint32_t elf_hwcap = get_elf_hwcap();
+ const char *hwcap_str;
+ int i;
+
+ dprintf(fd, "vendor_id : IBM/S390\n"
+ "# processors : %i\n"
+ "bogomips per cpu: 13370.00\n",
+ num_cpus);
+ dprintf(fd, "max thread id : 0\n");
+ dprintf(fd, "features\t: ");
+ for (i = 0; i < sizeof(elf_hwcap) * 8; i++) {
+ if (!(elf_hwcap & (1 << i))) {
+ continue;
+ }
+ hwcap_str = elf_hwcap_str(i);
+ if (hwcap_str) {
+ dprintf(fd, "%s ", hwcap_str);
+ }
+ }
+ dprintf(fd, "\n");
+ show_facilities(fd);
+ for (i = 0; i < num_cpus; i++) {
+ dprintf(fd, "processor %d: "
+ "version = %02X, "
+ "identification = %06X, "
+ "machine = %04X\n",
+ i, model->cpu_ver, cpu_ident(i), model->def->type);
+ }
+}
+
+static void show_cpu_ids(CPUArchState *cpu_env, int fd, unsigned long n)
+{
+ S390CPUModel *model = env_archcpu(cpu_env)->model;
+
+ dprintf(fd, "version : %02X\n", model->cpu_ver);
+ dprintf(fd, "identification : %06X\n", cpu_ident(n));
+ dprintf(fd, "machine : %04X\n", model->def->type);
+}
+
+static void show_cpuinfo(CPUArchState *cpu_env, int fd, unsigned long n)
+{
+ dprintf(fd, "\ncpu number : %ld\n", n);
+ show_cpu_ids(cpu_env, fd, n);
+}
+
+static int open_cpuinfo(CPUArchState *cpu_env, int fd)
+{
+ int num_cpus = sysconf(_SC_NPROCESSORS_ONLN);
+ int i;
+
+ show_cpu_summary(cpu_env, fd);
+ for (i = 0; i < num_cpus; i++) {
+ show_cpuinfo(cpu_env, fd, i);
+ }
+ return 0;
+}
+#define HAVE_ARCH_PROC_CPUINFO
+
+#endif /* S390X_TARGET_PROC_H */
diff --git a/linux-user/sh4/target_proc.h b/linux-user/sh4/target_proc.h
new file mode 100644
index 0000000000..43fe29ca72
--- /dev/null
+++ b/linux-user/sh4/target_proc.h
@@ -0,0 +1 @@
+/* No target-specific /proc support */
diff --git a/linux-user/sparc/target_proc.h b/linux-user/sparc/target_proc.h
new file mode 100644
index 0000000000..3bb3134a47
--- /dev/null
+++ b/linux-user/sparc/target_proc.h
@@ -0,0 +1,16 @@
+/*
+ * Sparc specific proc functions for linux-user
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+#ifndef SPARC_TARGET_PROC_H
+#define SPARC_TARGET_PROC_H
+
+static int open_cpuinfo(CPUArchState *cpu_env, int fd)
+{
+ dprintf(fd, "type\t\t: sun4u\n");
+ return 0;
+}
+#define HAVE_ARCH_PROC_CPUINFO
+
+#endif /* SPARC_TARGET_PROC_H */
diff --git a/linux-user/x86_64/target_proc.h b/linux-user/x86_64/target_proc.h
new file mode 100644
index 0000000000..43fe29ca72
--- /dev/null
+++ b/linux-user/x86_64/target_proc.h
@@ -0,0 +1 @@
+/* No target-specific /proc support */
diff --git a/linux-user/xtensa/target_proc.h b/linux-user/xtensa/target_proc.h
new file mode 100644
index 0000000000..43fe29ca72
--- /dev/null
+++ b/linux-user/xtensa/target_proc.h
@@ -0,0 +1 @@
+/* No target-specific /proc support */
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 9353268cc1..faad3a56df 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -8339,9 +8339,11 @@ void target_exception_dump(CPUArchState *env, const char *fmt, int code)
}
}
+#include "target_proc.h"
+
#if HOST_BIG_ENDIAN != TARGET_BIG_ENDIAN || \
- defined(TARGET_SPARC) || defined(TARGET_M68K) || defined(TARGET_HPPA) || \
- defined(TARGET_RISCV) || defined(TARGET_S390X)
+ defined(HAVE_ARCH_PROC_CPUINFO) || \
+ defined(HAVE_ARCH_PROC_HARDWARE)
static int is_proc(const char *filename, const char *entry)
{
return strcmp(filename, entry) == 0;
@@ -8393,171 +8395,6 @@ static int open_net_route(CPUArchState *cpu_env, int fd)
}
#endif
-#if defined(TARGET_SPARC)
-static int open_cpuinfo(CPUArchState *cpu_env, int fd)
-{
- dprintf(fd, "type\t\t: sun4u\n");
- return 0;
-}
-#endif
-
-#if defined(TARGET_HPPA)
-static int open_cpuinfo(CPUArchState *cpu_env, int fd)
-{
- int i, num_cpus;
-
- num_cpus = sysconf(_SC_NPROCESSORS_ONLN);
- for (i = 0; i < num_cpus; i++) {
- dprintf(fd, "processor\t: %d\n", i);
- dprintf(fd, "cpu family\t: PA-RISC 1.1e\n");
- dprintf(fd, "cpu\t\t: PA7300LC (PCX-L2)\n");
- dprintf(fd, "capabilities\t: os32\n");
- dprintf(fd, "model\t\t: 9000/778/B160L - "
- "Merlin L2 160 QEMU (9000/778/B160L)\n\n");
- }
- return 0;
-}
-#endif
-
-#if defined(TARGET_RISCV)
-static int open_cpuinfo(CPUArchState *cpu_env, int fd)
-{
- int i;
- int num_cpus = sysconf(_SC_NPROCESSORS_ONLN);
- RISCVCPU *cpu = env_archcpu(cpu_env);
- const RISCVCPUConfig *cfg = riscv_cpu_cfg((CPURISCVState *) cpu_env);
- char *isa_string = riscv_isa_string(cpu);
- const char *mmu;
-
- if (cfg->mmu) {
- mmu = (cpu_env->xl == MXL_RV32) ? "sv32" : "sv48";
- } else {
- mmu = "none";
- }
-
- for (i = 0; i < num_cpus; i++) {
- dprintf(fd, "processor\t: %d\n", i);
- dprintf(fd, "hart\t\t: %d\n", i);
- dprintf(fd, "isa\t\t: %s\n", isa_string);
- dprintf(fd, "mmu\t\t: %s\n", mmu);
- dprintf(fd, "uarch\t\t: qemu\n\n");
- }
-
- g_free(isa_string);
- return 0;
-}
-#endif
-
-#if defined(TARGET_S390X)
-/*
- * Emulate what a Linux kernel running in qemu-system-s390x -M accel=tcg would
- * show in /proc/cpuinfo.
- *
- * Skip the following in order to match the missing support in op_ecag():
- * - show_cacheinfo().
- * - show_cpu_topology().
- * - show_cpu_mhz().
- *
- * Use fixed values for certain fields:
- * - bogomips per cpu - from a qemu-system-s390x run.
- * - max thread id = 0, since SMT / SIGP_SET_MULTI_THREADING is not supported.
- *
- * Keep the code structure close to arch/s390/kernel/processor.c.
- */
-
-static void show_facilities(int fd)
-{
- size_t sizeof_stfl_bytes = 2048;
- g_autofree uint8_t *stfl_bytes = g_new0(uint8_t, sizeof_stfl_bytes);
- unsigned int bit;
-
- dprintf(fd, "facilities :");
- s390_get_feat_block(S390_FEAT_TYPE_STFL, stfl_bytes);
- for (bit = 0; bit < sizeof_stfl_bytes * 8; bit++) {
- if (test_be_bit(bit, stfl_bytes)) {
- dprintf(fd, " %d", bit);
- }
- }
- dprintf(fd, "\n");
-}
-
-static int cpu_ident(unsigned long n)
-{
- return deposit32(0, CPU_ID_BITS - CPU_PHYS_ADDR_BITS, CPU_PHYS_ADDR_BITS,
- n);
-}
-
-static void show_cpu_summary(CPUArchState *cpu_env, int fd)
-{
- S390CPUModel *model = env_archcpu(cpu_env)->model;
- int num_cpus = sysconf(_SC_NPROCESSORS_ONLN);
- uint32_t elf_hwcap = get_elf_hwcap();
- const char *hwcap_str;
- int i;
-
- dprintf(fd, "vendor_id : IBM/S390\n"
- "# processors : %i\n"
- "bogomips per cpu: 13370.00\n",
- num_cpus);
- dprintf(fd, "max thread id : 0\n");
- dprintf(fd, "features\t: ");
- for (i = 0; i < sizeof(elf_hwcap) * 8; i++) {
- if (!(elf_hwcap & (1 << i))) {
- continue;
- }
- hwcap_str = elf_hwcap_str(i);
- if (hwcap_str) {
- dprintf(fd, "%s ", hwcap_str);
- }
- }
- dprintf(fd, "\n");
- show_facilities(fd);
- for (i = 0; i < num_cpus; i++) {
- dprintf(fd, "processor %d: "
- "version = %02X, "
- "identification = %06X, "
- "machine = %04X\n",
- i, model->cpu_ver, cpu_ident(i), model->def->type);
- }
-}
-
-static void show_cpu_ids(CPUArchState *cpu_env, int fd, unsigned long n)
-{
- S390CPUModel *model = env_archcpu(cpu_env)->model;
-
- dprintf(fd, "version : %02X\n", model->cpu_ver);
- dprintf(fd, "identification : %06X\n", cpu_ident(n));
- dprintf(fd, "machine : %04X\n", model->def->type);
-}
-
-static void show_cpuinfo(CPUArchState *cpu_env, int fd, unsigned long n)
-{
- dprintf(fd, "\ncpu number : %ld\n", n);
- show_cpu_ids(cpu_env, fd, n);
-}
-
-static int open_cpuinfo(CPUArchState *cpu_env, int fd)
-{
- int num_cpus = sysconf(_SC_NPROCESSORS_ONLN);
- int i;
-
- show_cpu_summary(cpu_env, fd);
- for (i = 0; i < num_cpus; i++) {
- show_cpuinfo(cpu_env, fd, i);
- }
- return 0;
-}
-#endif
-
-#if defined(TARGET_M68K)
-static int open_hardware(CPUArchState *cpu_env, int fd)
-{
- dprintf(fd, "Model:\t\tqemu-m68k\n");
- return 0;
-}
-#endif
-
-
int do_guest_openat(CPUArchState *cpu_env, int dirfd, const char *fname,
int flags, mode_t mode, bool safe)
{
@@ -8578,11 +8415,10 @@ int do_guest_openat(CPUArchState *cpu_env, int dirfd, const char *fname,
#if HOST_BIG_ENDIAN != TARGET_BIG_ENDIAN
{ "/proc/net/route", open_net_route, is_proc },
#endif
-#if defined(TARGET_SPARC) || defined(TARGET_HPPA) || \
- defined(TARGET_RISCV) || defined(TARGET_S390X)
+#if defined(HAVE_ARCH_PROC_CPUINFO)
{ "/proc/cpuinfo", open_cpuinfo, is_proc },
#endif
-#if defined(TARGET_M68K)
+#if defined(HAVE_ARCH_PROC_HARDWARE)
{ "/proc/hardware", open_hardware, is_proc },
#endif
{ NULL, NULL, NULL }
--
2.34.1
^ permalink raw reply related [flat|nested] 23+ messages in thread
* [PATCH 02/13] linux-user: Emulate /proc/cpuinfo on aarch64 and arm
2023-08-24 1:02 [PATCH 00/13] linux-user patch queue Richard Henderson
2023-08-24 1:02 ` [PATCH 01/13] linux-user: Split out cpu/target_proc.h Richard Henderson
@ 2023-08-24 1:02 ` Richard Henderson
2023-08-24 1:02 ` [PATCH 03/13] linux-user: Emulate /proc/cpuinfo for Alpha Richard Henderson
` (11 subsequent siblings)
13 siblings, 0 replies; 23+ messages in thread
From: Richard Henderson @ 2023-08-24 1:02 UTC (permalink / raw)
To: qemu-devel; +Cc: Helge Deller
From: Helge Deller <deller@gmx.de>
Add emulation for /proc/cpuinfo for arm architecture.
The output below mimics output as seen on debian porterboxes.
aarch64 output example:
processor : 0
model name : ARMv8 Processor rev 0 (v8l)
BogoMIPS : 100.00
Features : swp half thumb fast_mult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae aes pmull sha1 sha2 crc32
CPU implementer : 0x41
CPU architecture: 8
CPU variant : 0x1
CPU part : 0xd07
CPU revision : 0
arm 32-bit output example:
processor : 0
model name : ARMv7 Processor rev 5 (armv7l)
BogoMIPS : 100.00
Features : swp half thumb fast_mult vfp edsp thumbee neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0f
CPU part : 0xc07
CPU revision : 5
Signed-off-by: Helge Deller <deller@gmx.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230803214450.647040-3-deller@gmx.de>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
linux-user/aarch64/target_proc.h | 2 +-
linux-user/arm/target_proc.h | 102 +++++++++++++++++++++++-
linux-user/loader.h | 6 +-
linux-user/elfload.c | 130 ++++++++++++++++++++++++++++++-
4 files changed, 233 insertions(+), 7 deletions(-)
diff --git a/linux-user/aarch64/target_proc.h b/linux-user/aarch64/target_proc.h
index 43fe29ca72..907df4dcd2 100644
--- a/linux-user/aarch64/target_proc.h
+++ b/linux-user/aarch64/target_proc.h
@@ -1 +1 @@
-/* No target-specific /proc support */
+#include "../arm/target_proc.h"
diff --git a/linux-user/arm/target_proc.h b/linux-user/arm/target_proc.h
index 43fe29ca72..ac75af9ca6 100644
--- a/linux-user/arm/target_proc.h
+++ b/linux-user/arm/target_proc.h
@@ -1 +1,101 @@
-/* No target-specific /proc support */
+/*
+ * Arm specific proc functions for linux-user
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+#ifndef ARM_TARGET_PROC_H
+#define ARM_TARGET_PROC_H
+
+static int open_cpuinfo(CPUArchState *cpu_env, int fd)
+{
+ ARMCPU *cpu = env_archcpu(cpu_env);
+ int arch, midr_rev, midr_part, midr_var, midr_impl;
+ target_ulong elf_hwcap = get_elf_hwcap();
+ target_ulong elf_hwcap2 = get_elf_hwcap2();
+ const char *elf_name;
+ int num_cpus, len_part, len_var;
+
+#if TARGET_BIG_ENDIAN
+# define END_SUFFIX "b"
+#else
+# define END_SUFFIX "l"
+#endif
+
+ arch = 8;
+ elf_name = "v8" END_SUFFIX;
+ midr_rev = FIELD_EX32(cpu->midr, MIDR_EL1, REVISION);
+ midr_part = FIELD_EX32(cpu->midr, MIDR_EL1, PARTNUM);
+ midr_var = FIELD_EX32(cpu->midr, MIDR_EL1, VARIANT);
+ midr_impl = FIELD_EX32(cpu->midr, MIDR_EL1, IMPLEMENTER);
+ len_part = 3;
+ len_var = 1;
+
+#ifndef TARGET_AARCH64
+ /* For simplicity, treat ARMv8 as an arm64 kernel with CONFIG_COMPAT. */
+ if (!arm_feature(&cpu->env, ARM_FEATURE_V8)) {
+ if (arm_feature(&cpu->env, ARM_FEATURE_V7)) {
+ arch = 7;
+ midr_var = (cpu->midr >> 16) & 0x7f;
+ len_var = 2;
+ if (arm_feature(&cpu->env, ARM_FEATURE_M)) {
+ elf_name = "armv7m" END_SUFFIX;
+ } else {
+ elf_name = "armv7" END_SUFFIX;
+ }
+ } else {
+ midr_part = cpu->midr >> 4;
+ len_part = 7;
+ if (arm_feature(&cpu->env, ARM_FEATURE_V6)) {
+ arch = 6;
+ elf_name = "armv6" END_SUFFIX;
+ } else if (arm_feature(&cpu->env, ARM_FEATURE_V5)) {
+ arch = 5;
+ elf_name = "armv5t" END_SUFFIX;
+ } else {
+ arch = 4;
+ elf_name = "armv4" END_SUFFIX;
+ }
+ }
+ }
+#endif
+
+#undef END_SUFFIX
+
+ num_cpus = sysconf(_SC_NPROCESSORS_ONLN);
+ for (int i = 0; i < num_cpus; i++) {
+ dprintf(fd,
+ "processor\t: %d\n"
+ "model name\t: ARMv%d Processor rev %d (%s)\n"
+ "BogoMIPS\t: 100.00\n"
+ "Features\t:",
+ i, arch, midr_rev, elf_name);
+
+ for (target_ulong j = elf_hwcap; j ; j &= j - 1) {
+ dprintf(fd, " %s", elf_hwcap_str(ctz64(j)));
+ }
+ for (target_ulong j = elf_hwcap2; j ; j &= j - 1) {
+ dprintf(fd, " %s", elf_hwcap2_str(ctz64(j)));
+ }
+
+ dprintf(fd, "\n"
+ "CPU implementer\t: 0x%02x\n"
+ "CPU architecture: %d\n"
+ "CPU variant\t: 0x%0*x\n",
+ midr_impl, arch, len_var, midr_var);
+ if (arch >= 7) {
+ dprintf(fd, "CPU part\t: 0x%0*x\n", len_part, midr_part);
+ }
+ dprintf(fd, "CPU revision\t: %d\n\n", midr_rev);
+ }
+
+ if (arch < 8) {
+ dprintf(fd, "Hardware\t: QEMU v%s %s\n", QEMU_VERSION,
+ cpu->dtb_compatible ? : "");
+ dprintf(fd, "Revision\t: 0000\n");
+ dprintf(fd, "Serial\t\t: 0000000000000000\n");
+ }
+ return 0;
+}
+#define HAVE_ARCH_PROC_CPUINFO
+
+#endif /* ARM_TARGET_PROC_H */
diff --git a/linux-user/loader.h b/linux-user/loader.h
index 59cbeacf24..324e5c872a 100644
--- a/linux-user/loader.h
+++ b/linux-user/loader.h
@@ -56,9 +56,13 @@ abi_long memcpy_to_target(abi_ulong dest, const void *src,
extern unsigned long guest_stack_size;
-#ifdef TARGET_S390X
+#if defined(TARGET_S390X) || defined(TARGET_AARCH64) || defined(TARGET_ARM)
uint32_t get_elf_hwcap(void);
const char *elf_hwcap_str(uint32_t bit);
#endif
+#if defined(TARGET_AARCH64) || defined(TARGET_ARM)
+uint32_t get_elf_hwcap2(void);
+const char *elf_hwcap2_str(uint32_t bit);
+#endif
#endif /* LINUX_USER_LOADER_H */
diff --git a/linux-user/elfload.c b/linux-user/elfload.c
index ac03beb01b..d5f67de288 100644
--- a/linux-user/elfload.c
+++ b/linux-user/elfload.c
@@ -466,7 +466,7 @@ static bool init_guest_commpage(void)
#define ELF_HWCAP get_elf_hwcap()
#define ELF_HWCAP2 get_elf_hwcap2()
-static uint32_t get_elf_hwcap(void)
+uint32_t get_elf_hwcap(void)
{
ARMCPU *cpu = ARM_CPU(thread_cpu);
uint32_t hwcaps = 0;
@@ -508,7 +508,7 @@ static uint32_t get_elf_hwcap(void)
return hwcaps;
}
-static uint32_t get_elf_hwcap2(void)
+uint32_t get_elf_hwcap2(void)
{
ARMCPU *cpu = ARM_CPU(thread_cpu);
uint32_t hwcaps = 0;
@@ -521,6 +521,49 @@ static uint32_t get_elf_hwcap2(void)
return hwcaps;
}
+const char *elf_hwcap_str(uint32_t bit)
+{
+ static const char *hwcap_str[] = {
+ [__builtin_ctz(ARM_HWCAP_ARM_SWP )] = "swp",
+ [__builtin_ctz(ARM_HWCAP_ARM_HALF )] = "half",
+ [__builtin_ctz(ARM_HWCAP_ARM_THUMB )] = "thumb",
+ [__builtin_ctz(ARM_HWCAP_ARM_26BIT )] = "26bit",
+ [__builtin_ctz(ARM_HWCAP_ARM_FAST_MULT)] = "fast_mult",
+ [__builtin_ctz(ARM_HWCAP_ARM_FPA )] = "fpa",
+ [__builtin_ctz(ARM_HWCAP_ARM_VFP )] = "vfp",
+ [__builtin_ctz(ARM_HWCAP_ARM_EDSP )] = "edsp",
+ [__builtin_ctz(ARM_HWCAP_ARM_JAVA )] = "java",
+ [__builtin_ctz(ARM_HWCAP_ARM_IWMMXT )] = "iwmmxt",
+ [__builtin_ctz(ARM_HWCAP_ARM_CRUNCH )] = "crunch",
+ [__builtin_ctz(ARM_HWCAP_ARM_THUMBEE )] = "thumbee",
+ [__builtin_ctz(ARM_HWCAP_ARM_NEON )] = "neon",
+ [__builtin_ctz(ARM_HWCAP_ARM_VFPv3 )] = "vfpv3",
+ [__builtin_ctz(ARM_HWCAP_ARM_VFPv3D16 )] = "vfpv3d16",
+ [__builtin_ctz(ARM_HWCAP_ARM_TLS )] = "tls",
+ [__builtin_ctz(ARM_HWCAP_ARM_VFPv4 )] = "vfpv4",
+ [__builtin_ctz(ARM_HWCAP_ARM_IDIVA )] = "idiva",
+ [__builtin_ctz(ARM_HWCAP_ARM_IDIVT )] = "idivt",
+ [__builtin_ctz(ARM_HWCAP_ARM_VFPD32 )] = "vfpd32",
+ [__builtin_ctz(ARM_HWCAP_ARM_LPAE )] = "lpae",
+ [__builtin_ctz(ARM_HWCAP_ARM_EVTSTRM )] = "evtstrm",
+ };
+
+ return bit < ARRAY_SIZE(hwcap_str) ? hwcap_str[bit] : NULL;
+}
+
+const char *elf_hwcap2_str(uint32_t bit)
+{
+ static const char *hwcap_str[] = {
+ [__builtin_ctz(ARM_HWCAP2_ARM_AES )] = "aes",
+ [__builtin_ctz(ARM_HWCAP2_ARM_PMULL)] = "pmull",
+ [__builtin_ctz(ARM_HWCAP2_ARM_SHA1 )] = "sha1",
+ [__builtin_ctz(ARM_HWCAP2_ARM_SHA2 )] = "sha2",
+ [__builtin_ctz(ARM_HWCAP2_ARM_CRC32)] = "crc32",
+ };
+
+ return bit < ARRAY_SIZE(hwcap_str) ? hwcap_str[bit] : NULL;
+}
+
#undef GET_FEATURE
#undef GET_FEATURE_ID
@@ -668,7 +711,7 @@ enum {
#define GET_FEATURE_ID(feat, hwcap) \
do { if (cpu_isar_feature(feat, cpu)) { hwcaps |= hwcap; } } while (0)
-static uint32_t get_elf_hwcap(void)
+uint32_t get_elf_hwcap(void)
{
ARMCPU *cpu = ARM_CPU(thread_cpu);
uint32_t hwcaps = 0;
@@ -706,7 +749,7 @@ static uint32_t get_elf_hwcap(void)
return hwcaps;
}
-static uint32_t get_elf_hwcap2(void)
+uint32_t get_elf_hwcap2(void)
{
ARMCPU *cpu = ARM_CPU(thread_cpu);
uint32_t hwcaps = 0;
@@ -741,6 +784,85 @@ static uint32_t get_elf_hwcap2(void)
return hwcaps;
}
+const char *elf_hwcap_str(uint32_t bit)
+{
+ static const char *hwcap_str[] = {
+ [__builtin_ctz(ARM_HWCAP_A64_FP )] = "fp",
+ [__builtin_ctz(ARM_HWCAP_A64_ASIMD )] = "asimd",
+ [__builtin_ctz(ARM_HWCAP_A64_EVTSTRM )] = "evtstrm",
+ [__builtin_ctz(ARM_HWCAP_A64_AES )] = "aes",
+ [__builtin_ctz(ARM_HWCAP_A64_PMULL )] = "pmull",
+ [__builtin_ctz(ARM_HWCAP_A64_SHA1 )] = "sha1",
+ [__builtin_ctz(ARM_HWCAP_A64_SHA2 )] = "sha2",
+ [__builtin_ctz(ARM_HWCAP_A64_CRC32 )] = "crc32",
+ [__builtin_ctz(ARM_HWCAP_A64_ATOMICS )] = "atomics",
+ [__builtin_ctz(ARM_HWCAP_A64_FPHP )] = "fphp",
+ [__builtin_ctz(ARM_HWCAP_A64_ASIMDHP )] = "asimdhp",
+ [__builtin_ctz(ARM_HWCAP_A64_CPUID )] = "cpuid",
+ [__builtin_ctz(ARM_HWCAP_A64_ASIMDRDM)] = "asimdrdm",
+ [__builtin_ctz(ARM_HWCAP_A64_JSCVT )] = "jscvt",
+ [__builtin_ctz(ARM_HWCAP_A64_FCMA )] = "fcma",
+ [__builtin_ctz(ARM_HWCAP_A64_LRCPC )] = "lrcpc",
+ [__builtin_ctz(ARM_HWCAP_A64_DCPOP )] = "dcpop",
+ [__builtin_ctz(ARM_HWCAP_A64_SHA3 )] = "sha3",
+ [__builtin_ctz(ARM_HWCAP_A64_SM3 )] = "sm3",
+ [__builtin_ctz(ARM_HWCAP_A64_SM4 )] = "sm4",
+ [__builtin_ctz(ARM_HWCAP_A64_ASIMDDP )] = "asimddp",
+ [__builtin_ctz(ARM_HWCAP_A64_SHA512 )] = "sha512",
+ [__builtin_ctz(ARM_HWCAP_A64_SVE )] = "sve",
+ [__builtin_ctz(ARM_HWCAP_A64_ASIMDFHM)] = "asimdfhm",
+ [__builtin_ctz(ARM_HWCAP_A64_DIT )] = "dit",
+ [__builtin_ctz(ARM_HWCAP_A64_USCAT )] = "uscat",
+ [__builtin_ctz(ARM_HWCAP_A64_ILRCPC )] = "ilrcpc",
+ [__builtin_ctz(ARM_HWCAP_A64_FLAGM )] = "flagm",
+ [__builtin_ctz(ARM_HWCAP_A64_SSBS )] = "ssbs",
+ [__builtin_ctz(ARM_HWCAP_A64_SB )] = "sb",
+ [__builtin_ctz(ARM_HWCAP_A64_PACA )] = "paca",
+ [__builtin_ctz(ARM_HWCAP_A64_PACG )] = "pacg",
+ };
+
+ return bit < ARRAY_SIZE(hwcap_str) ? hwcap_str[bit] : NULL;
+}
+
+const char *elf_hwcap2_str(uint32_t bit)
+{
+ static const char *hwcap_str[] = {
+ [__builtin_ctz(ARM_HWCAP2_A64_DCPODP )] = "dcpodp",
+ [__builtin_ctz(ARM_HWCAP2_A64_SVE2 )] = "sve2",
+ [__builtin_ctz(ARM_HWCAP2_A64_SVEAES )] = "sveaes",
+ [__builtin_ctz(ARM_HWCAP2_A64_SVEPMULL )] = "svepmull",
+ [__builtin_ctz(ARM_HWCAP2_A64_SVEBITPERM )] = "svebitperm",
+ [__builtin_ctz(ARM_HWCAP2_A64_SVESHA3 )] = "svesha3",
+ [__builtin_ctz(ARM_HWCAP2_A64_SVESM4 )] = "svesm4",
+ [__builtin_ctz(ARM_HWCAP2_A64_FLAGM2 )] = "flagm2",
+ [__builtin_ctz(ARM_HWCAP2_A64_FRINT )] = "frint",
+ [__builtin_ctz(ARM_HWCAP2_A64_SVEI8MM )] = "svei8mm",
+ [__builtin_ctz(ARM_HWCAP2_A64_SVEF32MM )] = "svef32mm",
+ [__builtin_ctz(ARM_HWCAP2_A64_SVEF64MM )] = "svef64mm",
+ [__builtin_ctz(ARM_HWCAP2_A64_SVEBF16 )] = "svebf16",
+ [__builtin_ctz(ARM_HWCAP2_A64_I8MM )] = "i8mm",
+ [__builtin_ctz(ARM_HWCAP2_A64_BF16 )] = "bf16",
+ [__builtin_ctz(ARM_HWCAP2_A64_DGH )] = "dgh",
+ [__builtin_ctz(ARM_HWCAP2_A64_RNG )] = "rng",
+ [__builtin_ctz(ARM_HWCAP2_A64_BTI )] = "bti",
+ [__builtin_ctz(ARM_HWCAP2_A64_MTE )] = "mte",
+ [__builtin_ctz(ARM_HWCAP2_A64_ECV )] = "ecv",
+ [__builtin_ctz(ARM_HWCAP2_A64_AFP )] = "afp",
+ [__builtin_ctz(ARM_HWCAP2_A64_RPRES )] = "rpres",
+ [__builtin_ctz(ARM_HWCAP2_A64_MTE3 )] = "mte3",
+ [__builtin_ctz(ARM_HWCAP2_A64_SME )] = "sme",
+ [__builtin_ctz(ARM_HWCAP2_A64_SME_I16I64 )] = "sme_i16i64",
+ [__builtin_ctz(ARM_HWCAP2_A64_SME_F64F64 )] = "sme_f64f64",
+ [__builtin_ctz(ARM_HWCAP2_A64_SME_I8I32 )] = "sme_i8i32",
+ [__builtin_ctz(ARM_HWCAP2_A64_SME_F16F32 )] = "sme_f16f32",
+ [__builtin_ctz(ARM_HWCAP2_A64_SME_B16F32 )] = "sme_b16f32",
+ [__builtin_ctz(ARM_HWCAP2_A64_SME_F32F32 )] = "sme_f32f32",
+ [__builtin_ctz(ARM_HWCAP2_A64_SME_FA64 )] = "sme_fa64",
+ };
+
+ return bit < ARRAY_SIZE(hwcap_str) ? hwcap_str[bit] : NULL;
+}
+
#undef GET_FEATURE_ID
#endif /* not TARGET_AARCH64 */
--
2.34.1
^ permalink raw reply related [flat|nested] 23+ messages in thread
* [PATCH 03/13] linux-user: Emulate /proc/cpuinfo for Alpha
2023-08-24 1:02 [PATCH 00/13] linux-user patch queue Richard Henderson
2023-08-24 1:02 ` [PATCH 01/13] linux-user: Split out cpu/target_proc.h Richard Henderson
2023-08-24 1:02 ` [PATCH 02/13] linux-user: Emulate /proc/cpuinfo on aarch64 and arm Richard Henderson
@ 2023-08-24 1:02 ` Richard Henderson
2025-01-21 10:39 ` Philippe Mathieu-Daudé
2023-08-24 1:02 ` [PATCH 04/13] util/selfmap: Use dev_t and ino_t in MapInfo Richard Henderson
` (10 subsequent siblings)
13 siblings, 1 reply; 23+ messages in thread
From: Richard Henderson @ 2023-08-24 1:02 UTC (permalink / raw)
To: qemu-devel; +Cc: Helge Deller, Michael Cree
From: Helge Deller <deller@gmx.de>
Add emulation for /proc/cpuinfo for the alpha architecture.
alpha output example:
(alpha-chroot)root@p100:/# cat /proc/cpuinfo
cpu : Alpha
cpu model : ev67
cpu variation : 0
cpu revision : 0
cpu serial number : JA00000000
system type : QEMU
system variation : QEMU_v8.0.92
system revision : 0
system serial number : AY00000000
cycle frequency [Hz] : 250000000
timer frequency [Hz] : 250.00
page size [bytes] : 8192
phys. address bits : 44
max. addr. space # : 255
BogoMIPS : 2500.00
platform string : AlphaServer QEMU user-mode VM
cpus detected : 8
cpus active : 4
cpu active mask : 0000000000000095
L1 Icache : n/a
L1 Dcache : n/a
L2 cache : n/a
L3 cache : n/a
Cc: Michael Cree <mcree@orcon.net.nz>
Signed-off-by: Helge Deller <deller@gmx.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230803214450.647040-4-deller@gmx.de>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
linux-user/alpha/target_proc.h | 68 +++++++++++++++++++++++++++++++++-
1 file changed, 67 insertions(+), 1 deletion(-)
diff --git a/linux-user/alpha/target_proc.h b/linux-user/alpha/target_proc.h
index 43fe29ca72..dac37dffc9 100644
--- a/linux-user/alpha/target_proc.h
+++ b/linux-user/alpha/target_proc.h
@@ -1 +1,67 @@
-/* No target-specific /proc support */
+/*
+ * Alpha specific proc functions for linux-user
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+#ifndef ALPHA_TARGET_PROC_H
+#define ALPHA_TARGET_PROC_H
+
+static int open_cpuinfo(CPUArchState *cpu_env, int fd)
+{
+ int max_cpus = sysconf(_SC_NPROCESSORS_CONF);
+ int num_cpus = sysconf(_SC_NPROCESSORS_ONLN);
+ unsigned long cpu_mask;
+ char model[32];
+ const char *p, *q;
+ int t;
+
+ p = object_class_get_name(OBJECT_CLASS(CPU_GET_CLASS(env_cpu(cpu_env))));
+ q = strchr(p, '-');
+ t = q - p;
+ assert(t < sizeof(model));
+ memcpy(model, p, t);
+ model[t] = 0;
+
+ t = sched_getaffinity(getpid(), sizeof(cpu_mask), (cpu_set_t *)&cpu_mask);
+ if (t < 0) {
+ if (num_cpus >= sizeof(cpu_mask) * 8) {
+ cpu_mask = -1;
+ } else {
+ cpu_mask = (1UL << num_cpus) - 1;
+ }
+ }
+
+ dprintf(fd,
+ "cpu\t\t\t: Alpha\n"
+ "cpu model\t\t: %s\n"
+ "cpu variation\t\t: 0\n"
+ "cpu revision\t\t: 0\n"
+ "cpu serial number\t: JA00000000\n"
+ "system type\t\t: QEMU\n"
+ "system variation\t: QEMU_v" QEMU_VERSION "\n"
+ "system revision\t\t: 0\n"
+ "system serial number\t: AY00000000\n"
+ "cycle frequency [Hz]\t: 250000000\n"
+ "timer frequency [Hz]\t: 250.00\n"
+ "page size [bytes]\t: %d\n"
+ "phys. address bits\t: %d\n"
+ "max. addr. space #\t: 255\n"
+ "BogoMIPS\t\t: 2500.00\n"
+ "kernel unaligned acc\t: 0 (pc=0,va=0)\n"
+ "user unaligned acc\t: 0 (pc=0,va=0)\n"
+ "platform string\t\t: AlphaServer QEMU user-mode VM\n"
+ "cpus detected\t\t: %d\n"
+ "cpus active\t\t: %d\n"
+ "cpu active mask\t\t: %016lx\n"
+ "L1 Icache\t\t: n/a\n"
+ "L1 Dcache\t\t: n/a\n"
+ "L2 cache\t\t: n/a\n"
+ "L3 cache\t\t: n/a\n",
+ model, TARGET_PAGE_SIZE, TARGET_PHYS_ADDR_SPACE_BITS,
+ max_cpus, num_cpus, cpu_mask);
+
+ return 0;
+}
+#define HAVE_ARCH_PROC_CPUINFO
+
+#endif /* ALPHA_TARGET_PROC_H */
--
2.34.1
^ permalink raw reply related [flat|nested] 23+ messages in thread
* [PATCH 04/13] util/selfmap: Use dev_t and ino_t in MapInfo
2023-08-24 1:02 [PATCH 00/13] linux-user patch queue Richard Henderson
` (2 preceding siblings ...)
2023-08-24 1:02 ` [PATCH 03/13] linux-user: Emulate /proc/cpuinfo for Alpha Richard Henderson
@ 2023-08-24 1:02 ` Richard Henderson
2023-08-24 1:02 ` [PATCH 05/13] linux-user: Use walk_memory_regions for open_self_maps Richard Henderson
` (9 subsequent siblings)
13 siblings, 0 replies; 23+ messages in thread
From: Richard Henderson @ 2023-08-24 1:02 UTC (permalink / raw)
To: qemu-devel; +Cc: Helge Deller, Ilya Leoshkevich, Philippe Mathieu-Daudé
Use dev_t instead of a string, and ino_t instead of uint64_t.
The latter is likely to be identical on modern systems but is
more type-correct for usage.
Tested-by: Helge Deller <deller@gmx.de>
Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
include/qemu/selfmap.h | 4 ++--
linux-user/syscall.c | 6 ++++--
util/selfmap.c | 12 +++++++-----
3 files changed, 13 insertions(+), 9 deletions(-)
diff --git a/include/qemu/selfmap.h b/include/qemu/selfmap.h
index 7d938945cb..1690a74f4b 100644
--- a/include/qemu/selfmap.h
+++ b/include/qemu/selfmap.h
@@ -20,10 +20,10 @@ typedef struct {
bool is_exec;
bool is_priv;
+ dev_t dev;
+ ino_t inode;
uint64_t offset;
- uint64_t inode;
const char *path;
- char dev[];
} MapInfo;
/**
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index faad3a56df..a562920a84 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -8160,13 +8160,15 @@ static int open_self_maps_1(CPUArchState *cpu_env, int fd, bool smaps)
}
count = dprintf(fd, TARGET_ABI_FMT_ptr "-" TARGET_ABI_FMT_ptr
- " %c%c%c%c %08" PRIx64 " %s %"PRId64,
+ " %c%c%c%c %08" PRIx64 " %02x:%02x %"PRId64,
h2g(min), h2g(max - 1) + 1,
(flags & PAGE_READ) ? 'r' : '-',
(flags & PAGE_WRITE_ORG) ? 'w' : '-',
(flags & PAGE_EXEC) ? 'x' : '-',
e->is_priv ? 'p' : 's',
- (uint64_t) e->offset, e->dev, e->inode);
+ (uint64_t)e->offset,
+ major(e->dev), minor(e->dev),
+ (uint64_t)e->inode);
if (path) {
dprintf(fd, "%*s%s\n", 73 - count, "", path);
} else {
diff --git a/util/selfmap.c b/util/selfmap.c
index 4db5b42651..483cb617e2 100644
--- a/util/selfmap.c
+++ b/util/selfmap.c
@@ -30,19 +30,21 @@ IntervalTreeRoot *read_self_maps(void)
if (nfields > 4) {
uint64_t start, end, offset, inode;
+ unsigned dev_maj, dev_min;
int errors = 0;
const char *p;
errors |= qemu_strtou64(fields[0], &p, 16, &start);
errors |= qemu_strtou64(p + 1, NULL, 16, &end);
errors |= qemu_strtou64(fields[2], NULL, 16, &offset);
+ errors |= qemu_strtoui(fields[3], &p, 16, &dev_maj);
+ errors |= qemu_strtoui(p + 1, NULL, 16, &dev_min);
errors |= qemu_strtou64(fields[4], NULL, 10, &inode);
if (!errors) {
- size_t dev_len, path_len;
+ size_t path_len;
MapInfo *e;
- dev_len = strlen(fields[3]) + 1;
if (nfields == 6) {
p = fields[5];
p += strspn(p, " ");
@@ -52,11 +54,12 @@ IntervalTreeRoot *read_self_maps(void)
path_len = 0;
}
- e = g_malloc0(sizeof(*e) + dev_len + path_len);
+ e = g_malloc0(sizeof(*e) + path_len);
e->itree.start = start;
e->itree.last = end - 1;
e->offset = offset;
+ e->dev = makedev(dev_maj, dev_min);
e->inode = inode;
e->is_read = fields[1][0] == 'r';
@@ -64,9 +67,8 @@ IntervalTreeRoot *read_self_maps(void)
e->is_exec = fields[1][2] == 'x';
e->is_priv = fields[1][3] == 'p';
- memcpy(e->dev, fields[3], dev_len);
if (path_len) {
- e->path = memcpy(e->dev + dev_len, p, path_len);
+ e->path = memcpy(e + 1, p, path_len);
}
interval_tree_insert(&e->itree, root);
--
2.34.1
^ permalink raw reply related [flat|nested] 23+ messages in thread
* [PATCH 05/13] linux-user: Use walk_memory_regions for open_self_maps
2023-08-24 1:02 [PATCH 00/13] linux-user patch queue Richard Henderson
` (3 preceding siblings ...)
2023-08-24 1:02 ` [PATCH 04/13] util/selfmap: Use dev_t and ino_t in MapInfo Richard Henderson
@ 2023-08-24 1:02 ` Richard Henderson
2023-08-24 1:02 ` [PATCH 06/13] linux-user: Adjust brk for load_bias Richard Henderson
` (8 subsequent siblings)
13 siblings, 0 replies; 23+ messages in thread
From: Richard Henderson @ 2023-08-24 1:02 UTC (permalink / raw)
To: qemu-devel; +Cc: Helge Deller, Ilya Leoshkevich
Replace the by-hand method of region identification with
the official user-exec interface. Cross-check the region
provided to the callback with the interval tree from
read_self_maps().
Tested-by: Helge Deller <deller@gmx.de>
Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
linux-user/syscall.c | 192 ++++++++++++++++++++++++++-----------------
1 file changed, 115 insertions(+), 77 deletions(-)
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index a562920a84..0b91f996b7 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -8095,12 +8095,66 @@ static int open_self_cmdline(CPUArchState *cpu_env, int fd)
return 0;
}
-static void show_smaps(int fd, unsigned long size)
-{
- unsigned long page_size_kb = TARGET_PAGE_SIZE >> 10;
- unsigned long size_kb = size >> 10;
+struct open_self_maps_data {
+ TaskState *ts;
+ IntervalTreeRoot *host_maps;
+ int fd;
+ bool smaps;
+};
- dprintf(fd, "Size: %lu kB\n"
+/*
+ * Subroutine to output one line of /proc/self/maps,
+ * or one region of /proc/self/smaps.
+ */
+
+#ifdef TARGET_HPPA
+# define test_stack(S, E, L) (E == L)
+#else
+# define test_stack(S, E, L) (S == L)
+#endif
+
+static void open_self_maps_4(const struct open_self_maps_data *d,
+ const MapInfo *mi, abi_ptr start,
+ abi_ptr end, unsigned flags)
+{
+ const struct image_info *info = d->ts->info;
+ const char *path = mi->path;
+ uint64_t offset;
+ int fd = d->fd;
+ int count;
+
+ if (test_stack(start, end, info->stack_limit)) {
+ path = "[stack]";
+ }
+
+ /* Except null device (MAP_ANON), adjust offset for this fragment. */
+ offset = mi->offset;
+ if (mi->dev) {
+ uintptr_t hstart = (uintptr_t)g2h_untagged(start);
+ offset += hstart - mi->itree.start;
+ }
+
+ count = dprintf(fd, TARGET_ABI_FMT_ptr "-" TARGET_ABI_FMT_ptr
+ " %c%c%c%c %08" PRIx64 " %02x:%02x %"PRId64,
+ start, end,
+ (flags & PAGE_READ) ? 'r' : '-',
+ (flags & PAGE_WRITE_ORG) ? 'w' : '-',
+ (flags & PAGE_EXEC) ? 'x' : '-',
+ mi->is_priv ? 'p' : 's',
+ offset, major(mi->dev), minor(mi->dev),
+ (uint64_t)mi->inode);
+ if (path) {
+ dprintf(fd, "%*s%s\n", 73 - count, "", path);
+ } else {
+ dprintf(fd, "\n");
+ }
+
+ if (d->smaps) {
+ unsigned long size = end - start;
+ unsigned long page_size_kb = TARGET_PAGE_SIZE >> 10;
+ unsigned long size_kb = size >> 10;
+
+ dprintf(fd, "Size: %lu kB\n"
"KernelPageSize: %lu kB\n"
"MMUPageSize: %lu kB\n"
"Rss: 0 kB\n"
@@ -8121,91 +8175,75 @@ static void show_smaps(int fd, unsigned long size)
"Swap: 0 kB\n"
"SwapPss: 0 kB\n"
"Locked: 0 kB\n"
- "THPeligible: 0\n", size_kb, page_size_kb, page_size_kb);
+ "THPeligible: 0\n"
+ "VmFlags:%s%s%s%s%s%s%s%s\n",
+ size_kb, page_size_kb, page_size_kb,
+ (flags & PAGE_READ) ? " rd" : "",
+ (flags & PAGE_WRITE_ORG) ? " wr" : "",
+ (flags & PAGE_EXEC) ? " ex" : "",
+ mi->is_priv ? "" : " sh",
+ (flags & PAGE_READ) ? " mr" : "",
+ (flags & PAGE_WRITE_ORG) ? " mw" : "",
+ (flags & PAGE_EXEC) ? " me" : "",
+ mi->is_priv ? "" : " ms");
+ }
}
-static int open_self_maps_1(CPUArchState *cpu_env, int fd, bool smaps)
+/*
+ * Callback for walk_memory_regions, when read_self_maps() fails.
+ * Proceed without the benefit of host /proc/self/maps cross-check.
+ */
+static int open_self_maps_3(void *opaque, target_ulong guest_start,
+ target_ulong guest_end, unsigned long flags)
{
- CPUState *cpu = env_cpu(cpu_env);
- TaskState *ts = cpu->opaque;
- IntervalTreeRoot *map_info = read_self_maps();
- IntervalTreeNode *s;
- int count;
+ static const MapInfo mi = { .is_priv = true };
- for (s = interval_tree_iter_first(map_info, 0, -1); s;
- s = interval_tree_iter_next(s, 0, -1)) {
- MapInfo *e = container_of(s, MapInfo, itree);
+ open_self_maps_4(opaque, &mi, guest_start, guest_end, flags);
+ return 0;
+}
- if (h2g_valid(e->itree.start)) {
- unsigned long min = e->itree.start;
- unsigned long max = e->itree.last + 1;
- int flags = page_get_flags(h2g(min));
- const char *path;
+/*
+ * Callback for walk_memory_regions, when read_self_maps() succeeds.
+ */
+static int open_self_maps_2(void *opaque, target_ulong guest_start,
+ target_ulong guest_end, unsigned long flags)
+{
+ const struct open_self_maps_data *d = opaque;
+ uintptr_t host_start = (uintptr_t)g2h_untagged(guest_start);
+ uintptr_t host_last = (uintptr_t)g2h_untagged(guest_end - 1);
- max = h2g_valid(max - 1) ?
- max : (uintptr_t) g2h_untagged(GUEST_ADDR_MAX) + 1;
+ while (1) {
+ IntervalTreeNode *n =
+ interval_tree_iter_first(d->host_maps, host_start, host_start);
+ MapInfo *mi = container_of(n, MapInfo, itree);
+ uintptr_t this_hlast = MIN(host_last, n->last);
+ target_ulong this_gend = h2g(this_hlast) + 1;
- if (!page_check_range(h2g(min), max - min, flags)) {
- continue;
- }
+ open_self_maps_4(d, mi, guest_start, this_gend, flags);
-#ifdef TARGET_HPPA
- if (h2g(max) == ts->info->stack_limit) {
-#else
- if (h2g(min) == ts->info->stack_limit) {
-#endif
- path = "[stack]";
- } else {
- path = e->path;
- }
-
- count = dprintf(fd, TARGET_ABI_FMT_ptr "-" TARGET_ABI_FMT_ptr
- " %c%c%c%c %08" PRIx64 " %02x:%02x %"PRId64,
- h2g(min), h2g(max - 1) + 1,
- (flags & PAGE_READ) ? 'r' : '-',
- (flags & PAGE_WRITE_ORG) ? 'w' : '-',
- (flags & PAGE_EXEC) ? 'x' : '-',
- e->is_priv ? 'p' : 's',
- (uint64_t)e->offset,
- major(e->dev), minor(e->dev),
- (uint64_t)e->inode);
- if (path) {
- dprintf(fd, "%*s%s\n", 73 - count, "", path);
- } else {
- dprintf(fd, "\n");
- }
- if (smaps) {
- show_smaps(fd, max - min);
- dprintf(fd, "VmFlags:%s%s%s%s%s%s%s%s\n",
- (flags & PAGE_READ) ? " rd" : "",
- (flags & PAGE_WRITE_ORG) ? " wr" : "",
- (flags & PAGE_EXEC) ? " ex" : "",
- e->is_priv ? "" : " sh",
- (flags & PAGE_READ) ? " mr" : "",
- (flags & PAGE_WRITE_ORG) ? " mw" : "",
- (flags & PAGE_EXEC) ? " me" : "",
- e->is_priv ? "" : " ms");
- }
+ if (this_hlast == host_last) {
+ return 0;
}
+ host_start = this_hlast + 1;
+ guest_start = h2g(host_start);
}
+}
- free_self_maps(map_info);
+static int open_self_maps_1(CPUArchState *env, int fd, bool smaps)
+{
+ struct open_self_maps_data d = {
+ .ts = env_cpu(env)->opaque,
+ .host_maps = read_self_maps(),
+ .fd = fd,
+ .smaps = smaps
+ };
-#ifdef TARGET_VSYSCALL_PAGE
- /*
- * We only support execution from the vsyscall page.
- * This is as if CONFIG_LEGACY_VSYSCALL_XONLY=y from v5.3.
- */
- count = dprintf(fd, TARGET_FMT_lx "-" TARGET_FMT_lx
- " --xp 00000000 00:00 0",
- TARGET_VSYSCALL_PAGE, TARGET_VSYSCALL_PAGE + TARGET_PAGE_SIZE);
- dprintf(fd, "%*s%s\n", 73 - count, "", "[vsyscall]");
- if (smaps) {
- show_smaps(fd, TARGET_PAGE_SIZE);
- dprintf(fd, "VmFlags: ex\n");
+ if (d.host_maps) {
+ walk_memory_regions(&d, open_self_maps_2);
+ free_self_maps(d.host_maps);
+ } else {
+ walk_memory_regions(&d, open_self_maps_3);
}
-#endif
-
return 0;
}
--
2.34.1
^ permalink raw reply related [flat|nested] 23+ messages in thread
* [PATCH 06/13] linux-user: Adjust brk for load_bias
2023-08-24 1:02 [PATCH 00/13] linux-user patch queue Richard Henderson
` (4 preceding siblings ...)
2023-08-24 1:02 ` [PATCH 05/13] linux-user: Use walk_memory_regions for open_self_maps Richard Henderson
@ 2023-08-24 1:02 ` Richard Henderson
2023-08-24 1:02 ` [PATCH 07/13] linux-user: Show heap address in /proc/pid/maps Richard Henderson
` (7 subsequent siblings)
13 siblings, 0 replies; 23+ messages in thread
From: Richard Henderson @ 2023-08-24 1:02 UTC (permalink / raw)
To: qemu-devel
Cc: qemu-stable, Helge Deller, Ilya Leoshkevich,
Philippe Mathieu-Daudé
PIE executables are usually linked at offset 0 and are
relocated somewhere during load. The hiaddr needs to
be adjusted to keep the brk next to the executable.
Cc: qemu-stable@nongnu.org
Fixes: 1f356e8c013 ("linux-user: Adjust initial brk when interpreter is close to executable")
Tested-by: Helge Deller <deller@gmx.de>
Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
linux-user/elfload.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/linux-user/elfload.c b/linux-user/elfload.c
index d5f67de288..dbc5d430e8 100644
--- a/linux-user/elfload.c
+++ b/linux-user/elfload.c
@@ -3326,7 +3326,7 @@ static void load_elf_image(const char *image_name, int image_fd,
info->start_data = -1;
info->end_data = 0;
/* Usual start for brk is after all sections of the main executable. */
- info->brk = TARGET_PAGE_ALIGN(hiaddr);
+ info->brk = TARGET_PAGE_ALIGN(hiaddr + load_bias);
info->elf_flags = ehdr->e_flags;
prot_exec = PROT_EXEC;
--
2.34.1
^ permalink raw reply related [flat|nested] 23+ messages in thread
* [PATCH 07/13] linux-user: Show heap address in /proc/pid/maps
2023-08-24 1:02 [PATCH 00/13] linux-user patch queue Richard Henderson
` (5 preceding siblings ...)
2023-08-24 1:02 ` [PATCH 06/13] linux-user: Adjust brk for load_bias Richard Henderson
@ 2023-08-24 1:02 ` Richard Henderson
2023-09-01 14:39 ` Philippe Mathieu-Daudé
2023-08-24 1:02 ` [PATCH 08/13] linux-user: Emulate the Anonymous: keyword in /proc/self/smaps Richard Henderson
` (6 subsequent siblings)
13 siblings, 1 reply; 23+ messages in thread
From: Richard Henderson @ 2023-08-24 1:02 UTC (permalink / raw)
To: qemu-devel; +Cc: Helge Deller, Ilya Leoshkevich
Tested-by: Helge Deller <deller@gmx.de>
Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
linux-user/syscall.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 0b91f996b7..0641d8f433 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -8125,6 +8125,8 @@ static void open_self_maps_4(const struct open_self_maps_data *d,
if (test_stack(start, end, info->stack_limit)) {
path = "[stack]";
+ } else if (start == info->brk) {
+ path = "[heap]";
}
/* Except null device (MAP_ANON), adjust offset for this fragment. */
--
2.34.1
^ permalink raw reply related [flat|nested] 23+ messages in thread
* [PATCH 08/13] linux-user: Emulate the Anonymous: keyword in /proc/self/smaps
2023-08-24 1:02 [PATCH 00/13] linux-user patch queue Richard Henderson
` (6 preceding siblings ...)
2023-08-24 1:02 ` [PATCH 07/13] linux-user: Show heap address in /proc/pid/maps Richard Henderson
@ 2023-08-24 1:02 ` Richard Henderson
2023-09-01 14:37 ` Philippe Mathieu-Daudé
2023-08-24 1:02 ` [PATCH 09/13] linux-user: Remove ELF_START_MMAP and image_info.start_mmap Richard Henderson
` (5 subsequent siblings)
13 siblings, 1 reply; 23+ messages in thread
From: Richard Henderson @ 2023-08-24 1:02 UTC (permalink / raw)
To: qemu-devel; +Cc: Ilya Leoshkevich
From: Ilya Leoshkevich <iii@linux.ibm.com>
Core dumps produced by gdb's gcore when connected to qemu's gdbstub
lack stack. The reason is that gdb includes only anonymous memory in
core dumps, which is distinguished by a non-0 Anonymous: value.
Consider the mappings with PAGE_ANON fully anonymous, and the mappings
without it fully non-anonymous.
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
[rth: Update for open_self_maps_* rewrite]
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
linux-user/syscall.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 0641d8f433..8d96acd085 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -8167,7 +8167,7 @@ static void open_self_maps_4(const struct open_self_maps_data *d,
"Private_Clean: 0 kB\n"
"Private_Dirty: 0 kB\n"
"Referenced: 0 kB\n"
- "Anonymous: 0 kB\n"
+ "Anonymous: %lu kB\n"
"LazyFree: 0 kB\n"
"AnonHugePages: 0 kB\n"
"ShmemPmdMapped: 0 kB\n"
@@ -8180,6 +8180,7 @@ static void open_self_maps_4(const struct open_self_maps_data *d,
"THPeligible: 0\n"
"VmFlags:%s%s%s%s%s%s%s%s\n",
size_kb, page_size_kb, page_size_kb,
+ (flags & PAGE_ANON ? size_kb : 0),
(flags & PAGE_READ) ? " rd" : "",
(flags & PAGE_WRITE_ORG) ? " wr" : "",
(flags & PAGE_EXEC) ? " ex" : "",
--
2.34.1
^ permalink raw reply related [flat|nested] 23+ messages in thread
* [PATCH 09/13] linux-user: Remove ELF_START_MMAP and image_info.start_mmap
2023-08-24 1:02 [PATCH 00/13] linux-user patch queue Richard Henderson
` (7 preceding siblings ...)
2023-08-24 1:02 ` [PATCH 08/13] linux-user: Emulate the Anonymous: keyword in /proc/self/smaps Richard Henderson
@ 2023-08-24 1:02 ` Richard Henderson
2023-08-24 1:02 ` [PATCH 10/13] linux-user: Move shmat and shmdt implementations to mmap.c Richard Henderson
` (4 subsequent siblings)
13 siblings, 0 replies; 23+ messages in thread
From: Richard Henderson @ 2023-08-24 1:02 UTC (permalink / raw)
To: qemu-devel; +Cc: Helge Deller, Ilya Leoshkevich, Philippe Mathieu-Daudé
The start_mmap value is write-only.
Remove the field and the defines that populated it.
Logically, this has been replaced by task_unmapped_base.
Tested-by: Helge Deller <deller@gmx.de>
Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
linux-user/qemu.h | 1 -
linux-user/elfload.c | 38 --------------------------------------
2 files changed, 39 deletions(-)
diff --git a/linux-user/qemu.h b/linux-user/qemu.h
index 4f8b55e2fb..12f638336a 100644
--- a/linux-user/qemu.h
+++ b/linux-user/qemu.h
@@ -30,7 +30,6 @@ struct image_info {
abi_ulong start_data;
abi_ulong end_data;
abi_ulong brk;
- abi_ulong start_mmap;
abi_ulong start_stack;
abi_ulong stack_limit;
abi_ulong entry;
diff --git a/linux-user/elfload.c b/linux-user/elfload.c
index dbc5d430e8..fdb87d80d3 100644
--- a/linux-user/elfload.c
+++ b/linux-user/elfload.c
@@ -143,8 +143,6 @@ static uint32_t get_elf_hwcap(void)
}
#ifdef TARGET_X86_64
-#define ELF_START_MMAP 0x2aaaaab000ULL
-
#define ELF_CLASS ELFCLASS64
#define ELF_ARCH EM_X86_64
@@ -221,8 +219,6 @@ static bool init_guest_commpage(void)
#endif
#else
-#define ELF_START_MMAP 0x80000000
-
/*
* This is used to ensure we don't load something for the wrong architecture.
*/
@@ -308,8 +304,6 @@ static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUX86State *en
#ifndef TARGET_AARCH64
/* 32 bit ARM definitions */
-#define ELF_START_MMAP 0x80000000
-
#define ELF_ARCH EM_ARM
#define ELF_CLASS ELFCLASS32
#define EXSTACK_DEFAULT true
@@ -600,7 +594,6 @@ static const char *get_elf_platform(void)
#else
/* 64 bit ARM definitions */
-#define ELF_START_MMAP 0x80000000
#define ELF_ARCH EM_AARCH64
#define ELF_CLASS ELFCLASS64
@@ -871,7 +864,6 @@ const char *elf_hwcap2_str(uint32_t bit)
#ifdef TARGET_SPARC
#ifdef TARGET_SPARC64
-#define ELF_START_MMAP 0x80000000
#define ELF_HWCAP (HWCAP_SPARC_FLUSH | HWCAP_SPARC_STBAR | HWCAP_SPARC_SWAP \
| HWCAP_SPARC_MULDIV | HWCAP_SPARC_V9)
#ifndef TARGET_ABI32
@@ -883,7 +875,6 @@ const char *elf_hwcap2_str(uint32_t bit)
#define ELF_CLASS ELFCLASS64
#define ELF_ARCH EM_SPARCV9
#else
-#define ELF_START_MMAP 0x80000000
#define ELF_HWCAP (HWCAP_SPARC_FLUSH | HWCAP_SPARC_STBAR | HWCAP_SPARC_SWAP \
| HWCAP_SPARC_MULDIV)
#define ELF_CLASS ELFCLASS32
@@ -905,7 +896,6 @@ static inline void init_thread(struct target_pt_regs *regs,
#ifdef TARGET_PPC
#define ELF_MACHINE PPC_ELF_MACHINE
-#define ELF_START_MMAP 0x80000000
#if defined(TARGET_PPC64)
@@ -1108,8 +1098,6 @@ static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUPPCState *en
#ifdef TARGET_LOONGARCH64
-#define ELF_START_MMAP 0x80000000
-
#define ELF_CLASS ELFCLASS64
#define ELF_ARCH EM_LOONGARCH
#define EXSTACK_DEFAULT true
@@ -1200,8 +1188,6 @@ static uint32_t get_elf_hwcap(void)
#ifdef TARGET_MIPS
-#define ELF_START_MMAP 0x80000000
-
#ifdef TARGET_MIPS64
#define ELF_CLASS ELFCLASS64
#else
@@ -1359,8 +1345,6 @@ static uint32_t get_elf_hwcap(void)
#ifdef TARGET_MICROBLAZE
-#define ELF_START_MMAP 0x80000000
-
#define elf_check_arch(x) ( (x) == EM_MICROBLAZE || (x) == EM_MICROBLAZE_OLD)
#define ELF_CLASS ELFCLASS32
@@ -1401,8 +1385,6 @@ static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUMBState *env
#ifdef TARGET_NIOS2
-#define ELF_START_MMAP 0x80000000
-
#define elf_check_arch(x) ((x) == EM_ALTERA_NIOS2)
#define ELF_CLASS ELFCLASS32
@@ -1498,8 +1480,6 @@ static void elf_core_copy_regs(target_elf_gregset_t *regs,
#ifdef TARGET_OPENRISC
-#define ELF_START_MMAP 0x08000000
-
#define ELF_ARCH EM_OPENRISC
#define ELF_CLASS ELFCLASS32
#define ELF_DATA ELFDATA2MSB
@@ -1536,8 +1516,6 @@ static void elf_core_copy_regs(target_elf_gregset_t *regs,
#ifdef TARGET_SH4
-#define ELF_START_MMAP 0x80000000
-
#define ELF_CLASS ELFCLASS32
#define ELF_ARCH EM_SH
@@ -1618,8 +1596,6 @@ static uint32_t get_elf_hwcap(void)
#ifdef TARGET_CRIS
-#define ELF_START_MMAP 0x80000000
-
#define ELF_CLASS ELFCLASS32
#define ELF_ARCH EM_CRIS
@@ -1635,8 +1611,6 @@ static inline void init_thread(struct target_pt_regs *regs,
#ifdef TARGET_M68K
-#define ELF_START_MMAP 0x80000000
-
#define ELF_CLASS ELFCLASS32
#define ELF_ARCH EM_68K
@@ -1686,8 +1660,6 @@ static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUM68KState *e
#ifdef TARGET_ALPHA
-#define ELF_START_MMAP (0x30000000000ULL)
-
#define ELF_CLASS ELFCLASS64
#define ELF_ARCH EM_ALPHA
@@ -1705,8 +1677,6 @@ static inline void init_thread(struct target_pt_regs *regs,
#ifdef TARGET_S390X
-#define ELF_START_MMAP (0x20000000000ULL)
-
#define ELF_CLASS ELFCLASS64
#define ELF_DATA ELFDATA2MSB
#define ELF_ARCH EM_S390
@@ -1816,7 +1786,6 @@ static void elf_core_copy_regs(target_elf_gregset_t *regs,
#ifdef TARGET_RISCV
-#define ELF_START_MMAP 0x80000000
#define ELF_ARCH EM_RISCV
#ifdef TARGET_RISCV32
@@ -1852,7 +1821,6 @@ static inline void init_thread(struct target_pt_regs *regs,
#ifdef TARGET_HPPA
-#define ELF_START_MMAP 0x80000000
#define ELF_CLASS ELFCLASS32
#define ELF_ARCH EM_PARISC
#define ELF_PLATFORM "PARISC"
@@ -1904,8 +1872,6 @@ static bool init_guest_commpage(void)
#ifdef TARGET_XTENSA
-#define ELF_START_MMAP 0x20000000
-
#define ELF_CLASS ELFCLASS32
#define ELF_ARCH EM_XTENSA
@@ -1971,8 +1937,6 @@ static void elf_core_copy_regs(target_elf_gregset_t *regs,
#ifdef TARGET_HEXAGON
-#define ELF_START_MMAP 0x20000000
-
#define ELF_CLASS ELFCLASS32
#define ELF_ARCH EM_HEXAGON
@@ -3689,8 +3653,6 @@ int load_elf_binary(struct linux_binprm *bprm, struct image_info *info)
interp_info.fp_abi = MIPS_ABI_FP_UNKNOWN;
#endif
- info->start_mmap = (abi_ulong)ELF_START_MMAP;
-
load_elf_image(bprm->filename, bprm->fd, info,
&elf_interpreter, bprm->buf);
--
2.34.1
^ permalink raw reply related [flat|nested] 23+ messages in thread
* [PATCH 10/13] linux-user: Move shmat and shmdt implementations to mmap.c
2023-08-24 1:02 [PATCH 00/13] linux-user patch queue Richard Henderson
` (8 preceding siblings ...)
2023-08-24 1:02 ` [PATCH 09/13] linux-user: Remove ELF_START_MMAP and image_info.start_mmap Richard Henderson
@ 2023-08-24 1:02 ` Richard Henderson
2023-08-24 1:02 ` [PATCH 11/13] linux-user: Use WITH_MMAP_LOCK_GUARD in target_{shmat, shmdt} Richard Henderson
` (3 subsequent siblings)
13 siblings, 0 replies; 23+ messages in thread
From: Richard Henderson @ 2023-08-24 1:02 UTC (permalink / raw)
To: qemu-devel; +Cc: Philippe Mathieu-Daudé, Warner Losh
Rename from do_* to target_*. Fix some minor checkpatch errors.
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Warner Losh <imp@bsdimp.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
linux-user/user-mmap.h | 4 ++
linux-user/mmap.c | 138 +++++++++++++++++++++++++++++++++++++++
linux-user/syscall.c | 143 ++---------------------------------------
3 files changed, 146 insertions(+), 139 deletions(-)
diff --git a/linux-user/user-mmap.h b/linux-user/user-mmap.h
index 0f4883eb57..b94bcdcf83 100644
--- a/linux-user/user-mmap.h
+++ b/linux-user/user-mmap.h
@@ -58,4 +58,8 @@ abi_ulong mmap_find_vma(abi_ulong, abi_ulong, abi_ulong);
void mmap_fork_start(void);
void mmap_fork_end(int child);
+abi_ulong target_shmat(CPUArchState *cpu_env, int shmid,
+ abi_ulong shmaddr, int shmflg);
+abi_long target_shmdt(abi_ulong shmaddr);
+
#endif /* LINUX_USER_USER_MMAP_H */
diff --git a/linux-user/mmap.c b/linux-user/mmap.c
index 9aab48d4a3..3aeacd1ecd 100644
--- a/linux-user/mmap.c
+++ b/linux-user/mmap.c
@@ -17,6 +17,7 @@
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
+#include <sys/shm.h>
#include "trace.h"
#include "exec/log.h"
#include "qemu.h"
@@ -27,6 +28,14 @@
static pthread_mutex_t mmap_mutex = PTHREAD_MUTEX_INITIALIZER;
static __thread int mmap_lock_count;
+#define N_SHM_REGIONS 32
+
+static struct shm_region {
+ abi_ulong start;
+ abi_ulong size;
+ bool in_use;
+} shm_regions[N_SHM_REGIONS];
+
void mmap_lock(void)
{
if (mmap_lock_count++ == 0) {
@@ -981,3 +990,132 @@ abi_long target_madvise(abi_ulong start, abi_ulong len_in, int advice)
return ret;
}
+
+#ifndef TARGET_FORCE_SHMLBA
+/*
+ * For most architectures, SHMLBA is the same as the page size;
+ * some architectures have larger values, in which case they should
+ * define TARGET_FORCE_SHMLBA and provide a target_shmlba() function.
+ * This corresponds to the kernel arch code defining __ARCH_FORCE_SHMLBA
+ * and defining its own value for SHMLBA.
+ *
+ * The kernel also permits SHMLBA to be set by the architecture to a
+ * value larger than the page size without setting __ARCH_FORCE_SHMLBA;
+ * this means that addresses are rounded to the large size if
+ * SHM_RND is set but addresses not aligned to that size are not rejected
+ * as long as they are at least page-aligned. Since the only architecture
+ * which uses this is ia64 this code doesn't provide for that oddity.
+ */
+static inline abi_ulong target_shmlba(CPUArchState *cpu_env)
+{
+ return TARGET_PAGE_SIZE;
+}
+#endif
+
+abi_ulong target_shmat(CPUArchState *cpu_env, int shmid,
+ abi_ulong shmaddr, int shmflg)
+{
+ CPUState *cpu = env_cpu(cpu_env);
+ abi_ulong raddr;
+ void *host_raddr;
+ struct shmid_ds shm_info;
+ int i, ret;
+ abi_ulong shmlba;
+
+ /* shmat pointers are always untagged */
+
+ /* find out the length of the shared memory segment */
+ ret = get_errno(shmctl(shmid, IPC_STAT, &shm_info));
+ if (is_error(ret)) {
+ /* can't get length, bail out */
+ return ret;
+ }
+
+ shmlba = target_shmlba(cpu_env);
+
+ if (shmaddr & (shmlba - 1)) {
+ if (shmflg & SHM_RND) {
+ shmaddr &= ~(shmlba - 1);
+ } else {
+ return -TARGET_EINVAL;
+ }
+ }
+ if (!guest_range_valid_untagged(shmaddr, shm_info.shm_segsz)) {
+ return -TARGET_EINVAL;
+ }
+
+ mmap_lock();
+
+ /*
+ * We're mapping shared memory, so ensure we generate code for parallel
+ * execution and flush old translations. This will work up to the level
+ * supported by the host -- anything that requires EXCP_ATOMIC will not
+ * be atomic with respect to an external process.
+ */
+ if (!(cpu->tcg_cflags & CF_PARALLEL)) {
+ cpu->tcg_cflags |= CF_PARALLEL;
+ tb_flush(cpu);
+ }
+
+ if (shmaddr) {
+ host_raddr = shmat(shmid, (void *)g2h_untagged(shmaddr), shmflg);
+ } else {
+ abi_ulong mmap_start;
+
+ /* In order to use the host shmat, we need to honor host SHMLBA. */
+ mmap_start = mmap_find_vma(0, shm_info.shm_segsz, MAX(SHMLBA, shmlba));
+
+ if (mmap_start == -1) {
+ errno = ENOMEM;
+ host_raddr = (void *)-1;
+ } else {
+ host_raddr = shmat(shmid, g2h_untagged(mmap_start),
+ shmflg | SHM_REMAP);
+ }
+ }
+
+ if (host_raddr == (void *)-1) {
+ mmap_unlock();
+ return get_errno((intptr_t)host_raddr);
+ }
+ raddr = h2g((uintptr_t)host_raddr);
+
+ page_set_flags(raddr, raddr + shm_info.shm_segsz - 1,
+ PAGE_VALID | PAGE_RESET | PAGE_READ |
+ (shmflg & SHM_RDONLY ? 0 : PAGE_WRITE));
+
+ for (i = 0; i < N_SHM_REGIONS; i++) {
+ if (!shm_regions[i].in_use) {
+ shm_regions[i].in_use = true;
+ shm_regions[i].start = raddr;
+ shm_regions[i].size = shm_info.shm_segsz;
+ break;
+ }
+ }
+
+ mmap_unlock();
+ return raddr;
+}
+
+abi_long target_shmdt(abi_ulong shmaddr)
+{
+ int i;
+ abi_long rv;
+
+ /* shmdt pointers are always untagged */
+
+ mmap_lock();
+
+ for (i = 0; i < N_SHM_REGIONS; ++i) {
+ if (shm_regions[i].in_use && shm_regions[i].start == shmaddr) {
+ shm_regions[i].in_use = false;
+ page_set_flags(shmaddr, shmaddr + shm_regions[i].size - 1, 0);
+ break;
+ }
+ }
+ rv = get_errno(shmdt(g2h_untagged(shmaddr)));
+
+ mmap_unlock();
+
+ return rv;
+}
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 8d96acd085..ff4eefe7fc 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -3725,14 +3725,6 @@ static abi_long do_socketcall(int num, abi_ulong vptr)
}
#endif
-#define N_SHM_REGIONS 32
-
-static struct shm_region {
- abi_ulong start;
- abi_ulong size;
- bool in_use;
-} shm_regions[N_SHM_REGIONS];
-
#ifndef TARGET_SEMID64_DS
/* asm-generic version of this struct */
struct target_semid64_ds
@@ -4482,133 +4474,6 @@ static inline abi_long do_shmctl(int shmid, int cmd, abi_long buf)
return ret;
}
-#ifndef TARGET_FORCE_SHMLBA
-/* For most architectures, SHMLBA is the same as the page size;
- * some architectures have larger values, in which case they should
- * define TARGET_FORCE_SHMLBA and provide a target_shmlba() function.
- * This corresponds to the kernel arch code defining __ARCH_FORCE_SHMLBA
- * and defining its own value for SHMLBA.
- *
- * The kernel also permits SHMLBA to be set by the architecture to a
- * value larger than the page size without setting __ARCH_FORCE_SHMLBA;
- * this means that addresses are rounded to the large size if
- * SHM_RND is set but addresses not aligned to that size are not rejected
- * as long as they are at least page-aligned. Since the only architecture
- * which uses this is ia64 this code doesn't provide for that oddity.
- */
-static inline abi_ulong target_shmlba(CPUArchState *cpu_env)
-{
- return TARGET_PAGE_SIZE;
-}
-#endif
-
-static abi_ulong do_shmat(CPUArchState *cpu_env, int shmid,
- abi_ulong shmaddr, int shmflg)
-{
- CPUState *cpu = env_cpu(cpu_env);
- abi_ulong raddr;
- void *host_raddr;
- struct shmid_ds shm_info;
- int i, ret;
- abi_ulong shmlba;
-
- /* shmat pointers are always untagged */
-
- /* find out the length of the shared memory segment */
- ret = get_errno(shmctl(shmid, IPC_STAT, &shm_info));
- if (is_error(ret)) {
- /* can't get length, bail out */
- return ret;
- }
-
- shmlba = target_shmlba(cpu_env);
-
- if (shmaddr & (shmlba - 1)) {
- if (shmflg & SHM_RND) {
- shmaddr &= ~(shmlba - 1);
- } else {
- return -TARGET_EINVAL;
- }
- }
- if (!guest_range_valid_untagged(shmaddr, shm_info.shm_segsz)) {
- return -TARGET_EINVAL;
- }
-
- mmap_lock();
-
- /*
- * We're mapping shared memory, so ensure we generate code for parallel
- * execution and flush old translations. This will work up to the level
- * supported by the host -- anything that requires EXCP_ATOMIC will not
- * be atomic with respect to an external process.
- */
- if (!(cpu->tcg_cflags & CF_PARALLEL)) {
- cpu->tcg_cflags |= CF_PARALLEL;
- tb_flush(cpu);
- }
-
- if (shmaddr)
- host_raddr = shmat(shmid, (void *)g2h_untagged(shmaddr), shmflg);
- else {
- abi_ulong mmap_start;
-
- /* In order to use the host shmat, we need to honor host SHMLBA. */
- mmap_start = mmap_find_vma(0, shm_info.shm_segsz, MAX(SHMLBA, shmlba));
-
- if (mmap_start == -1) {
- errno = ENOMEM;
- host_raddr = (void *)-1;
- } else
- host_raddr = shmat(shmid, g2h_untagged(mmap_start),
- shmflg | SHM_REMAP);
- }
-
- if (host_raddr == (void *)-1) {
- mmap_unlock();
- return get_errno((intptr_t)host_raddr);
- }
- raddr = h2g((uintptr_t)host_raddr);
-
- page_set_flags(raddr, raddr + shm_info.shm_segsz - 1,
- PAGE_VALID | PAGE_RESET | PAGE_READ |
- (shmflg & SHM_RDONLY ? 0 : PAGE_WRITE));
-
- for (i = 0; i < N_SHM_REGIONS; i++) {
- if (!shm_regions[i].in_use) {
- shm_regions[i].in_use = true;
- shm_regions[i].start = raddr;
- shm_regions[i].size = shm_info.shm_segsz;
- break;
- }
- }
-
- mmap_unlock();
- return raddr;
-}
-
-static inline abi_long do_shmdt(abi_ulong shmaddr)
-{
- int i;
- abi_long rv;
-
- /* shmdt pointers are always untagged */
-
- mmap_lock();
-
- for (i = 0; i < N_SHM_REGIONS; ++i) {
- if (shm_regions[i].in_use && shm_regions[i].start == shmaddr) {
- shm_regions[i].in_use = false;
- page_set_flags(shmaddr, shmaddr + shm_regions[i].size - 1, 0);
- break;
- }
- }
- rv = get_errno(shmdt(g2h_untagged(shmaddr)));
-
- mmap_unlock();
-
- return rv;
-}
-
#ifdef TARGET_NR_ipc
/* ??? This only works with linear mappings. */
/* do_ipc() must return target values and target errnos. */
@@ -4695,7 +4560,7 @@ static abi_long do_ipc(CPUArchState *cpu_env,
default:
{
abi_ulong raddr;
- raddr = do_shmat(cpu_env, first, ptr, second);
+ raddr = target_shmat(cpu_env, first, ptr, second);
if (is_error(raddr))
return get_errno(raddr);
if (put_user_ual(raddr, third))
@@ -4708,7 +4573,7 @@ static abi_long do_ipc(CPUArchState *cpu_env,
}
break;
case IPCOP_shmdt:
- ret = do_shmdt(ptr);
+ ret = target_shmdt(ptr);
break;
case IPCOP_shmget:
@@ -11008,11 +10873,11 @@ static abi_long do_syscall1(CPUArchState *cpu_env, int num, abi_long arg1,
#endif
#ifdef TARGET_NR_shmat
case TARGET_NR_shmat:
- return do_shmat(cpu_env, arg1, arg2, arg3);
+ return target_shmat(cpu_env, arg1, arg2, arg3);
#endif
#ifdef TARGET_NR_shmdt
case TARGET_NR_shmdt:
- return do_shmdt(arg1);
+ return target_shmdt(arg1);
#endif
case TARGET_NR_fsync:
return get_errno(fsync(arg1));
--
2.34.1
^ permalink raw reply related [flat|nested] 23+ messages in thread
* [PATCH 11/13] linux-user: Use WITH_MMAP_LOCK_GUARD in target_{shmat, shmdt}
2023-08-24 1:02 [PATCH 00/13] linux-user patch queue Richard Henderson
` (9 preceding siblings ...)
2023-08-24 1:02 ` [PATCH 10/13] linux-user: Move shmat and shmdt implementations to mmap.c Richard Henderson
@ 2023-08-24 1:02 ` Richard Henderson
2023-09-01 14:58 ` Helge Deller
2023-08-24 1:02 ` [PATCH 12/13] linux-user: Fix shmdt Richard Henderson
` (2 subsequent siblings)
13 siblings, 1 reply; 23+ messages in thread
From: Richard Henderson @ 2023-08-24 1:02 UTC (permalink / raw)
To: qemu-devel
Move the CF_PARALLEL setting outside of the mmap lock.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
linux-user/mmap.c | 98 ++++++++++++++++++++++-------------------------
1 file changed, 46 insertions(+), 52 deletions(-)
diff --git a/linux-user/mmap.c b/linux-user/mmap.c
index 3aeacd1ecd..f45b2d307c 100644
--- a/linux-user/mmap.c
+++ b/linux-user/mmap.c
@@ -1017,9 +1017,8 @@ abi_ulong target_shmat(CPUArchState *cpu_env, int shmid,
{
CPUState *cpu = env_cpu(cpu_env);
abi_ulong raddr;
- void *host_raddr;
struct shmid_ds shm_info;
- int i, ret;
+ int ret;
abi_ulong shmlba;
/* shmat pointers are always untagged */
@@ -1044,7 +1043,43 @@ abi_ulong target_shmat(CPUArchState *cpu_env, int shmid,
return -TARGET_EINVAL;
}
- mmap_lock();
+ WITH_MMAP_LOCK_GUARD() {
+ void *host_raddr;
+
+ if (shmaddr) {
+ host_raddr = shmat(shmid, (void *)g2h_untagged(shmaddr), shmflg);
+ } else {
+ abi_ulong mmap_start;
+
+ /* In order to use the host shmat, we need to honor host SHMLBA. */
+ mmap_start = mmap_find_vma(0, shm_info.shm_segsz,
+ MAX(SHMLBA, shmlba));
+
+ if (mmap_start == -1) {
+ return -TARGET_ENOMEM;
+ }
+ host_raddr = shmat(shmid, g2h_untagged(mmap_start),
+ shmflg | SHM_REMAP);
+ }
+
+ if (host_raddr == (void *)-1) {
+ return get_errno(-1);
+ }
+ raddr = h2g(host_raddr);
+
+ page_set_flags(raddr, raddr + shm_info.shm_segsz - 1,
+ PAGE_VALID | PAGE_RESET | PAGE_READ |
+ (shmflg & SHM_RDONLY ? 0 : PAGE_WRITE));
+
+ for (int i = 0; i < N_SHM_REGIONS; i++) {
+ if (!shm_regions[i].in_use) {
+ shm_regions[i].in_use = true;
+ shm_regions[i].start = raddr;
+ shm_regions[i].size = shm_info.shm_segsz;
+ break;
+ }
+ }
+ }
/*
* We're mapping shared memory, so ensure we generate code for parallel
@@ -1057,65 +1092,24 @@ abi_ulong target_shmat(CPUArchState *cpu_env, int shmid,
tb_flush(cpu);
}
- if (shmaddr) {
- host_raddr = shmat(shmid, (void *)g2h_untagged(shmaddr), shmflg);
- } else {
- abi_ulong mmap_start;
-
- /* In order to use the host shmat, we need to honor host SHMLBA. */
- mmap_start = mmap_find_vma(0, shm_info.shm_segsz, MAX(SHMLBA, shmlba));
-
- if (mmap_start == -1) {
- errno = ENOMEM;
- host_raddr = (void *)-1;
- } else {
- host_raddr = shmat(shmid, g2h_untagged(mmap_start),
- shmflg | SHM_REMAP);
- }
- }
-
- if (host_raddr == (void *)-1) {
- mmap_unlock();
- return get_errno((intptr_t)host_raddr);
- }
- raddr = h2g((uintptr_t)host_raddr);
-
- page_set_flags(raddr, raddr + shm_info.shm_segsz - 1,
- PAGE_VALID | PAGE_RESET | PAGE_READ |
- (shmflg & SHM_RDONLY ? 0 : PAGE_WRITE));
-
- for (i = 0; i < N_SHM_REGIONS; i++) {
- if (!shm_regions[i].in_use) {
- shm_regions[i].in_use = true;
- shm_regions[i].start = raddr;
- shm_regions[i].size = shm_info.shm_segsz;
- break;
- }
- }
-
- mmap_unlock();
return raddr;
}
abi_long target_shmdt(abi_ulong shmaddr)
{
- int i;
abi_long rv;
/* shmdt pointers are always untagged */
- mmap_lock();
-
- for (i = 0; i < N_SHM_REGIONS; ++i) {
- if (shm_regions[i].in_use && shm_regions[i].start == shmaddr) {
- shm_regions[i].in_use = false;
- page_set_flags(shmaddr, shmaddr + shm_regions[i].size - 1, 0);
- break;
+ WITH_MMAP_LOCK_GUARD() {
+ for (int i = 0; i < N_SHM_REGIONS; ++i) {
+ if (shm_regions[i].in_use && shm_regions[i].start == shmaddr) {
+ shm_regions[i].in_use = false;
+ page_set_flags(shmaddr, shmaddr + shm_regions[i].size - 1, 0);
+ break;
+ }
}
+ rv = get_errno(shmdt(g2h_untagged(shmaddr)));
}
- rv = get_errno(shmdt(g2h_untagged(shmaddr)));
-
- mmap_unlock();
-
return rv;
}
--
2.34.1
^ permalink raw reply related [flat|nested] 23+ messages in thread
* [PATCH 12/13] linux-user: Fix shmdt
2023-08-24 1:02 [PATCH 00/13] linux-user patch queue Richard Henderson
` (10 preceding siblings ...)
2023-08-24 1:02 ` [PATCH 11/13] linux-user: Use WITH_MMAP_LOCK_GUARD in target_{shmat, shmdt} Richard Henderson
@ 2023-08-24 1:02 ` Richard Henderson
2023-09-01 14:38 ` Philippe Mathieu-Daudé
2023-08-24 1:02 ` [PATCH 13/13] linux-user: Track shm regions with an interval tree Richard Henderson
2023-09-01 2:32 ` [PATCH 00/13] linux-user patch queue Richard Henderson
13 siblings, 1 reply; 23+ messages in thread
From: Richard Henderson @ 2023-08-24 1:02 UTC (permalink / raw)
To: qemu-devel
If the shm region is not mapped at shmaddr, EINVAL.
Do not unmap the region until the syscall succeeds.
Use mmap_reserve_or_unmap to preserve reserved_va semantics.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
linux-user/mmap.c | 17 ++++++++++++++---
1 file changed, 14 insertions(+), 3 deletions(-)
diff --git a/linux-user/mmap.c b/linux-user/mmap.c
index f45b2d307c..44116c014b 100644
--- a/linux-user/mmap.c
+++ b/linux-user/mmap.c
@@ -1102,14 +1102,25 @@ abi_long target_shmdt(abi_ulong shmaddr)
/* shmdt pointers are always untagged */
WITH_MMAP_LOCK_GUARD() {
- for (int i = 0; i < N_SHM_REGIONS; ++i) {
+ int i;
+
+ for (i = 0; i < N_SHM_REGIONS; ++i) {
if (shm_regions[i].in_use && shm_regions[i].start == shmaddr) {
- shm_regions[i].in_use = false;
- page_set_flags(shmaddr, shmaddr + shm_regions[i].size - 1, 0);
break;
}
}
+ if (i == N_SHM_REGIONS) {
+ return -TARGET_EINVAL;
+ }
+
rv = get_errno(shmdt(g2h_untagged(shmaddr)));
+ if (rv == 0) {
+ abi_ulong size = shm_regions[i].size;
+
+ shm_regions[i].in_use = false;
+ page_set_flags(shmaddr, shmaddr + size - 1, 0);
+ mmap_reserve_or_unmap(shmaddr, size);
+ }
}
return rv;
}
--
2.34.1
^ permalink raw reply related [flat|nested] 23+ messages in thread
* [PATCH 13/13] linux-user: Track shm regions with an interval tree
2023-08-24 1:02 [PATCH 00/13] linux-user patch queue Richard Henderson
` (11 preceding siblings ...)
2023-08-24 1:02 ` [PATCH 12/13] linux-user: Fix shmdt Richard Henderson
@ 2023-08-24 1:02 ` Richard Henderson
2023-09-01 15:10 ` Helge Deller
2023-09-01 2:32 ` [PATCH 00/13] linux-user patch queue Richard Henderson
13 siblings, 1 reply; 23+ messages in thread
From: Richard Henderson @ 2023-08-24 1:02 UTC (permalink / raw)
To: qemu-devel
Remove the fixed size shm_regions[] array.
Remove references when other mappings completely remove
or replace a region.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
linux-user/mmap.c | 81 +++++++++++++++++++++++++++++++----------------
1 file changed, 53 insertions(+), 28 deletions(-)
diff --git a/linux-user/mmap.c b/linux-user/mmap.c
index 44116c014b..8eaf57b208 100644
--- a/linux-user/mmap.c
+++ b/linux-user/mmap.c
@@ -24,18 +24,11 @@
#include "user-internals.h"
#include "user-mmap.h"
#include "target_mman.h"
+#include "qemu/interval-tree.h"
static pthread_mutex_t mmap_mutex = PTHREAD_MUTEX_INITIALIZER;
static __thread int mmap_lock_count;
-#define N_SHM_REGIONS 32
-
-static struct shm_region {
- abi_ulong start;
- abi_ulong size;
- bool in_use;
-} shm_regions[N_SHM_REGIONS];
-
void mmap_lock(void)
{
if (mmap_lock_count++ == 0) {
@@ -73,6 +66,44 @@ void mmap_fork_end(int child)
}
}
+/* Protected by mmap_lock. */
+static IntervalTreeRoot shm_regions;
+
+static void shm_region_add(abi_ptr start, abi_ptr last)
+{
+ IntervalTreeNode *i = g_new0(IntervalTreeNode, 1);
+
+ i->start = start;
+ i->last = last;
+ interval_tree_insert(i, &shm_regions);
+}
+
+static abi_ptr shm_region_find(abi_ptr start)
+{
+ IntervalTreeNode *i;
+
+ for (i = interval_tree_iter_first(&shm_regions, start, start); i;
+ i = interval_tree_iter_next(i, start, start)) {
+ if (i->start == start) {
+ return i->last;
+ }
+ }
+ return 0;
+}
+
+static void shm_region_rm_complete(abi_ptr start, abi_ptr last)
+{
+ IntervalTreeNode *i, *n;
+
+ for (i = interval_tree_iter_first(&shm_regions, start, last); i; i = n) {
+ n = interval_tree_iter_next(i, start, last);
+ if (i->start >= start && i->last <= last) {
+ interval_tree_remove(i, &shm_regions);
+ g_free(i);
+ }
+ }
+}
+
/*
* Validate target prot bitmask.
* Return the prot bitmask for the host in *HOST_PROT.
@@ -729,6 +760,7 @@ abi_long target_mmap(abi_ulong start, abi_ulong len, int target_prot,
page_set_flags(passthrough_last + 1, last, page_flags);
}
}
+ shm_region_rm_complete(start, last);
the_end:
trace_target_mmap_complete(start);
if (qemu_loglevel_mask(CPU_LOG_PAGE)) {
@@ -826,6 +858,7 @@ int target_munmap(abi_ulong start, abi_ulong len)
mmap_lock();
mmap_reserve_or_unmap(start, len);
page_set_flags(start, start + len - 1, 0);
+ shm_region_rm_complete(start, start + len - 1);
mmap_unlock();
return 0;
@@ -915,8 +948,10 @@ abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size,
new_addr = h2g(host_addr);
prot = page_get_flags(old_addr);
page_set_flags(old_addr, old_addr + old_size - 1, 0);
+ shm_region_rm_complete(old_addr, old_addr + old_size - 1);
page_set_flags(new_addr, new_addr + new_size - 1,
prot | PAGE_VALID | PAGE_RESET);
+ shm_region_rm_complete(new_addr, new_addr + new_size - 1);
}
mmap_unlock();
return new_addr;
@@ -1045,6 +1080,7 @@ abi_ulong target_shmat(CPUArchState *cpu_env, int shmid,
WITH_MMAP_LOCK_GUARD() {
void *host_raddr;
+ abi_ulong last;
if (shmaddr) {
host_raddr = shmat(shmid, (void *)g2h_untagged(shmaddr), shmflg);
@@ -1066,19 +1102,14 @@ abi_ulong target_shmat(CPUArchState *cpu_env, int shmid,
return get_errno(-1);
}
raddr = h2g(host_raddr);
+ last = raddr + shm_info.shm_segsz - 1;
- page_set_flags(raddr, raddr + shm_info.shm_segsz - 1,
+ page_set_flags(raddr, last,
PAGE_VALID | PAGE_RESET | PAGE_READ |
(shmflg & SHM_RDONLY ? 0 : PAGE_WRITE));
- for (int i = 0; i < N_SHM_REGIONS; i++) {
- if (!shm_regions[i].in_use) {
- shm_regions[i].in_use = true;
- shm_regions[i].start = raddr;
- shm_regions[i].size = shm_info.shm_segsz;
- break;
- }
- }
+ shm_region_rm_complete(raddr, last);
+ shm_region_add(raddr, last);
}
/*
@@ -1102,23 +1133,17 @@ abi_long target_shmdt(abi_ulong shmaddr)
/* shmdt pointers are always untagged */
WITH_MMAP_LOCK_GUARD() {
- int i;
-
- for (i = 0; i < N_SHM_REGIONS; ++i) {
- if (shm_regions[i].in_use && shm_regions[i].start == shmaddr) {
- break;
- }
- }
- if (i == N_SHM_REGIONS) {
+ abi_ulong last = shm_region_find(shmaddr);
+ if (last == 0) {
return -TARGET_EINVAL;
}
rv = get_errno(shmdt(g2h_untagged(shmaddr)));
if (rv == 0) {
- abi_ulong size = shm_regions[i].size;
+ abi_ulong size = last - shmaddr + 1;
- shm_regions[i].in_use = false;
- page_set_flags(shmaddr, shmaddr + size - 1, 0);
+ page_set_flags(shmaddr, last, 0);
+ shm_region_rm_complete(shmaddr, last);
mmap_reserve_or_unmap(shmaddr, size);
}
}
--
2.34.1
^ permalink raw reply related [flat|nested] 23+ messages in thread
* Re: [PATCH 00/13] linux-user patch queue
2023-08-24 1:02 [PATCH 00/13] linux-user patch queue Richard Henderson
` (12 preceding siblings ...)
2023-08-24 1:02 ` [PATCH 13/13] linux-user: Track shm regions with an interval tree Richard Henderson
@ 2023-09-01 2:32 ` Richard Henderson
2023-09-01 15:12 ` Helge Deller
13 siblings, 1 reply; 23+ messages in thread
From: Richard Henderson @ 2023-09-01 2:32 UTC (permalink / raw)
To: qemu-devel
Ping.
On 8/23/23 18:02, Richard Henderson wrote:
> Combine a bunch of smaller linux-user patches:
>
> Supercedes: 20230801230842.414421-1-deller@gmx.de
> ("[PATCH v2 0/3] linux-user: /proc/cpuinfo fix and content emulation for arm")
> Supercedes: 20230807122206.655701-1-iii@linux.ibm.com
> ("[PATCH v2] linux-user: Emulate the Anonymous: keyword in /proc/self/smaps")
> Supercedes: 20230816181437.572997-1-richard.henderson@linaro.org
> ("[PATCH 0/6] linux-user: Rewrite open_self_maps")
> Supercedes: 20230820204408.327348-1-richard.henderson@linaro.org
> ("[PATCH 0/4] linux-user: shmat/shmdt improvements")
>
> with some additions. Patches needing review:
>
> 01-linux-user-Split-out-cpu-target_proc.h.patch
> 11-linux-user-Use-WITH_MMAP_LOCK_GUARD-in-target_-shmat.patch
> 12-linux-user-Fix-shmdt.patch
> 13-linux-user-Track-shm-regions-with-an-interval-tree.patch
>
>
> r~
>
>
> Helge Deller (2):
> linux-user: Emulate /proc/cpuinfo on aarch64 and arm
> linux-user: Emulate /proc/cpuinfo for Alpha
>
> Ilya Leoshkevich (1):
> linux-user: Emulate the Anonymous: keyword in /proc/self/smaps
>
> Richard Henderson (10):
> linux-user: Split out cpu/target_proc.h
> util/selfmap: Use dev_t and ino_t in MapInfo
> linux-user: Use walk_memory_regions for open_self_maps
> linux-user: Adjust brk for load_bias
> linux-user: Show heap address in /proc/pid/maps
> linux-user: Remove ELF_START_MMAP and image_info.start_mmap
> linux-user: Move shmat and shmdt implementations to mmap.c
> linux-user: Use WITH_MMAP_LOCK_GUARD in target_{shmat,shmdt}
> linux-user: Fix shmdt
> linux-user: Track shm regions with an interval tree
>
> include/qemu/selfmap.h | 4 +-
> linux-user/aarch64/target_proc.h | 1 +
> linux-user/alpha/target_proc.h | 67 ++++
> linux-user/arm/target_proc.h | 101 ++++++
> linux-user/cris/target_proc.h | 1 +
> linux-user/hexagon/target_proc.h | 1 +
> linux-user/hppa/target_proc.h | 26 ++
> linux-user/i386/target_proc.h | 1 +
> linux-user/loader.h | 6 +-
> linux-user/loongarch64/target_proc.h | 1 +
> linux-user/m68k/target_proc.h | 16 +
> linux-user/microblaze/target_proc.h | 1 +
> linux-user/mips/target_proc.h | 1 +
> linux-user/mips64/target_proc.h | 1 +
> linux-user/nios2/target_proc.h | 1 +
> linux-user/openrisc/target_proc.h | 1 +
> linux-user/ppc/target_proc.h | 1 +
> linux-user/qemu.h | 1 -
> linux-user/riscv/target_proc.h | 37 ++
> linux-user/s390x/target_proc.h | 109 ++++++
> linux-user/sh4/target_proc.h | 1 +
> linux-user/sparc/target_proc.h | 16 +
> linux-user/user-mmap.h | 4 +
> linux-user/x86_64/target_proc.h | 1 +
> linux-user/xtensa/target_proc.h | 1 +
> linux-user/elfload.c | 170 ++++++---
> linux-user/mmap.c | 168 +++++++++
> linux-user/syscall.c | 514 +++++++--------------------
> util/selfmap.c | 12 +-
> 29 files changed, 828 insertions(+), 437 deletions(-)
> create mode 100644 linux-user/aarch64/target_proc.h
> create mode 100644 linux-user/alpha/target_proc.h
> create mode 100644 linux-user/arm/target_proc.h
> create mode 100644 linux-user/cris/target_proc.h
> create mode 100644 linux-user/hexagon/target_proc.h
> create mode 100644 linux-user/hppa/target_proc.h
> create mode 100644 linux-user/i386/target_proc.h
> create mode 100644 linux-user/loongarch64/target_proc.h
> create mode 100644 linux-user/m68k/target_proc.h
> create mode 100644 linux-user/microblaze/target_proc.h
> create mode 100644 linux-user/mips/target_proc.h
> create mode 100644 linux-user/mips64/target_proc.h
> create mode 100644 linux-user/nios2/target_proc.h
> create mode 100644 linux-user/openrisc/target_proc.h
> create mode 100644 linux-user/ppc/target_proc.h
> create mode 100644 linux-user/riscv/target_proc.h
> create mode 100644 linux-user/s390x/target_proc.h
> create mode 100644 linux-user/sh4/target_proc.h
> create mode 100644 linux-user/sparc/target_proc.h
> create mode 100644 linux-user/x86_64/target_proc.h
> create mode 100644 linux-user/xtensa/target_proc.h
>
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [PATCH 01/13] linux-user: Split out cpu/target_proc.h
2023-08-24 1:02 ` [PATCH 01/13] linux-user: Split out cpu/target_proc.h Richard Henderson
@ 2023-09-01 14:35 ` Philippe Mathieu-Daudé
0 siblings, 0 replies; 23+ messages in thread
From: Philippe Mathieu-Daudé @ 2023-09-01 14:35 UTC (permalink / raw)
To: Richard Henderson, qemu-devel
On 24/8/23 03:02, Richard Henderson wrote:
> Move the various open_cpuinfo functions into new files.
> Move the m68k open_hardware function as well.
> All other guest architectures get a boilerplate empty file.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> linux-user/aarch64/target_proc.h | 1 +
> linux-user/alpha/target_proc.h | 1 +
> linux-user/arm/target_proc.h | 1 +
> linux-user/cris/target_proc.h | 1 +
> linux-user/hexagon/target_proc.h | 1 +
> linux-user/hppa/target_proc.h | 26 ++++
> linux-user/i386/target_proc.h | 1 +
> linux-user/loongarch64/target_proc.h | 1 +
> linux-user/m68k/target_proc.h | 16 +++
> linux-user/microblaze/target_proc.h | 1 +
> linux-user/mips/target_proc.h | 1 +
> linux-user/mips64/target_proc.h | 1 +
> linux-user/nios2/target_proc.h | 1 +
> linux-user/openrisc/target_proc.h | 1 +
> linux-user/ppc/target_proc.h | 1 +
> linux-user/riscv/target_proc.h | 37 ++++++
> linux-user/s390x/target_proc.h | 109 +++++++++++++++++
> linux-user/sh4/target_proc.h | 1 +
> linux-user/sparc/target_proc.h | 16 +++
> linux-user/x86_64/target_proc.h | 1 +
> linux-user/xtensa/target_proc.h | 1 +
> linux-user/syscall.c | 176 +--------------------------
> 22 files changed, 226 insertions(+), 170 deletions(-)
> create mode 100644 linux-user/aarch64/target_proc.h
> create mode 100644 linux-user/alpha/target_proc.h
> create mode 100644 linux-user/arm/target_proc.h
> create mode 100644 linux-user/cris/target_proc.h
> create mode 100644 linux-user/hexagon/target_proc.h
> create mode 100644 linux-user/hppa/target_proc.h
> create mode 100644 linux-user/i386/target_proc.h
> create mode 100644 linux-user/loongarch64/target_proc.h
> create mode 100644 linux-user/m68k/target_proc.h
> create mode 100644 linux-user/microblaze/target_proc.h
> create mode 100644 linux-user/mips/target_proc.h
> create mode 100644 linux-user/mips64/target_proc.h
> create mode 100644 linux-user/nios2/target_proc.h
> create mode 100644 linux-user/openrisc/target_proc.h
> create mode 100644 linux-user/ppc/target_proc.h
> create mode 100644 linux-user/riscv/target_proc.h
> create mode 100644 linux-user/s390x/target_proc.h
> create mode 100644 linux-user/sh4/target_proc.h
> create mode 100644 linux-user/sparc/target_proc.h
> create mode 100644 linux-user/x86_64/target_proc.h
> create mode 100644 linux-user/xtensa/target_proc.h
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [PATCH 08/13] linux-user: Emulate the Anonymous: keyword in /proc/self/smaps
2023-08-24 1:02 ` [PATCH 08/13] linux-user: Emulate the Anonymous: keyword in /proc/self/smaps Richard Henderson
@ 2023-09-01 14:37 ` Philippe Mathieu-Daudé
0 siblings, 0 replies; 23+ messages in thread
From: Philippe Mathieu-Daudé @ 2023-09-01 14:37 UTC (permalink / raw)
To: Richard Henderson, qemu-devel; +Cc: Ilya Leoshkevich
On 24/8/23 03:02, Richard Henderson wrote:
> From: Ilya Leoshkevich <iii@linux.ibm.com>
>
> Core dumps produced by gdb's gcore when connected to qemu's gdbstub
> lack stack. The reason is that gdb includes only anonymous memory in
> core dumps, which is distinguished by a non-0 Anonymous: value.
>
> Consider the mappings with PAGE_ANON fully anonymous, and the mappings
> without it fully non-anonymous.
>
> Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
> [rth: Update for open_self_maps_* rewrite]
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> linux-user/syscall.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [PATCH 12/13] linux-user: Fix shmdt
2023-08-24 1:02 ` [PATCH 12/13] linux-user: Fix shmdt Richard Henderson
@ 2023-09-01 14:38 ` Philippe Mathieu-Daudé
0 siblings, 0 replies; 23+ messages in thread
From: Philippe Mathieu-Daudé @ 2023-09-01 14:38 UTC (permalink / raw)
To: Richard Henderson, qemu-devel
On 24/8/23 03:02, Richard Henderson wrote:
> If the shm region is not mapped at shmaddr, EINVAL.
> Do not unmap the region until the syscall succeeds.
> Use mmap_reserve_or_unmap to preserve reserved_va semantics.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> linux-user/mmap.c | 17 ++++++++++++++---
> 1 file changed, 14 insertions(+), 3 deletions(-)
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [PATCH 07/13] linux-user: Show heap address in /proc/pid/maps
2023-08-24 1:02 ` [PATCH 07/13] linux-user: Show heap address in /proc/pid/maps Richard Henderson
@ 2023-09-01 14:39 ` Philippe Mathieu-Daudé
0 siblings, 0 replies; 23+ messages in thread
From: Philippe Mathieu-Daudé @ 2023-09-01 14:39 UTC (permalink / raw)
To: Richard Henderson, qemu-devel; +Cc: Helge Deller, Ilya Leoshkevich
On 24/8/23 03:02, Richard Henderson wrote:
> Tested-by: Helge Deller <deller@gmx.de>
> Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> linux-user/syscall.c | 2 ++
> 1 file changed, 2 insertions(+)
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [PATCH 11/13] linux-user: Use WITH_MMAP_LOCK_GUARD in target_{shmat, shmdt}
2023-08-24 1:02 ` [PATCH 11/13] linux-user: Use WITH_MMAP_LOCK_GUARD in target_{shmat, shmdt} Richard Henderson
@ 2023-09-01 14:58 ` Helge Deller
0 siblings, 0 replies; 23+ messages in thread
From: Helge Deller @ 2023-09-01 14:58 UTC (permalink / raw)
To: Richard Henderson, qemu-devel
On 8/24/23 03:02, Richard Henderson wrote:
> Move the CF_PARALLEL setting outside of the mmap lock.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Helge Deller <deller@gmx.de>
> ---
> linux-user/mmap.c | 98 ++++++++++++++++++++++-------------------------
> 1 file changed, 46 insertions(+), 52 deletions(-)
>
> diff --git a/linux-user/mmap.c b/linux-user/mmap.c
> index 3aeacd1ecd..f45b2d307c 100644
> --- a/linux-user/mmap.c
> +++ b/linux-user/mmap.c
> @@ -1017,9 +1017,8 @@ abi_ulong target_shmat(CPUArchState *cpu_env, int shmid,
> {
> CPUState *cpu = env_cpu(cpu_env);
> abi_ulong raddr;
> - void *host_raddr;
> struct shmid_ds shm_info;
> - int i, ret;
> + int ret;
> abi_ulong shmlba;
>
> /* shmat pointers are always untagged */
> @@ -1044,7 +1043,43 @@ abi_ulong target_shmat(CPUArchState *cpu_env, int shmid,
> return -TARGET_EINVAL;
> }
>
> - mmap_lock();
> + WITH_MMAP_LOCK_GUARD() {
> + void *host_raddr;
> +
> + if (shmaddr) {
> + host_raddr = shmat(shmid, (void *)g2h_untagged(shmaddr), shmflg);
> + } else {
> + abi_ulong mmap_start;
> +
> + /* In order to use the host shmat, we need to honor host SHMLBA. */
> + mmap_start = mmap_find_vma(0, shm_info.shm_segsz,
> + MAX(SHMLBA, shmlba));
> +
> + if (mmap_start == -1) {
> + return -TARGET_ENOMEM;
> + }
> + host_raddr = shmat(shmid, g2h_untagged(mmap_start),
> + shmflg | SHM_REMAP);
> + }
> +
> + if (host_raddr == (void *)-1) {
> + return get_errno(-1);
> + }
> + raddr = h2g(host_raddr);
> +
> + page_set_flags(raddr, raddr + shm_info.shm_segsz - 1,
> + PAGE_VALID | PAGE_RESET | PAGE_READ |
> + (shmflg & SHM_RDONLY ? 0 : PAGE_WRITE));
> +
> + for (int i = 0; i < N_SHM_REGIONS; i++) {
> + if (!shm_regions[i].in_use) {
> + shm_regions[i].in_use = true;
> + shm_regions[i].start = raddr;
> + shm_regions[i].size = shm_info.shm_segsz;
> + break;
> + }
> + }
> + }
>
> /*
> * We're mapping shared memory, so ensure we generate code for parallel
> @@ -1057,65 +1092,24 @@ abi_ulong target_shmat(CPUArchState *cpu_env, int shmid,
> tb_flush(cpu);
> }
>
> - if (shmaddr) {
> - host_raddr = shmat(shmid, (void *)g2h_untagged(shmaddr), shmflg);
> - } else {
> - abi_ulong mmap_start;
> -
> - /* In order to use the host shmat, we need to honor host SHMLBA. */
> - mmap_start = mmap_find_vma(0, shm_info.shm_segsz, MAX(SHMLBA, shmlba));
> -
> - if (mmap_start == -1) {
> - errno = ENOMEM;
> - host_raddr = (void *)-1;
> - } else {
> - host_raddr = shmat(shmid, g2h_untagged(mmap_start),
> - shmflg | SHM_REMAP);
> - }
> - }
> -
> - if (host_raddr == (void *)-1) {
> - mmap_unlock();
> - return get_errno((intptr_t)host_raddr);
> - }
> - raddr = h2g((uintptr_t)host_raddr);
> -
> - page_set_flags(raddr, raddr + shm_info.shm_segsz - 1,
> - PAGE_VALID | PAGE_RESET | PAGE_READ |
> - (shmflg & SHM_RDONLY ? 0 : PAGE_WRITE));
> -
> - for (i = 0; i < N_SHM_REGIONS; i++) {
> - if (!shm_regions[i].in_use) {
> - shm_regions[i].in_use = true;
> - shm_regions[i].start = raddr;
> - shm_regions[i].size = shm_info.shm_segsz;
> - break;
> - }
> - }
> -
> - mmap_unlock();
> return raddr;
> }
>
> abi_long target_shmdt(abi_ulong shmaddr)
> {
> - int i;
> abi_long rv;
>
> /* shmdt pointers are always untagged */
>
> - mmap_lock();
> -
> - for (i = 0; i < N_SHM_REGIONS; ++i) {
> - if (shm_regions[i].in_use && shm_regions[i].start == shmaddr) {
> - shm_regions[i].in_use = false;
> - page_set_flags(shmaddr, shmaddr + shm_regions[i].size - 1, 0);
> - break;
> + WITH_MMAP_LOCK_GUARD() {
> + for (int i = 0; i < N_SHM_REGIONS; ++i) {
> + if (shm_regions[i].in_use && shm_regions[i].start == shmaddr) {
> + shm_regions[i].in_use = false;
> + page_set_flags(shmaddr, shmaddr + shm_regions[i].size - 1, 0);
> + break;
> + }
> }
> + rv = get_errno(shmdt(g2h_untagged(shmaddr)));
> }
> - rv = get_errno(shmdt(g2h_untagged(shmaddr)));
> -
> - mmap_unlock();
> -
> return rv;
> }
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [PATCH 13/13] linux-user: Track shm regions with an interval tree
2023-08-24 1:02 ` [PATCH 13/13] linux-user: Track shm regions with an interval tree Richard Henderson
@ 2023-09-01 15:10 ` Helge Deller
0 siblings, 0 replies; 23+ messages in thread
From: Helge Deller @ 2023-09-01 15:10 UTC (permalink / raw)
To: Richard Henderson, qemu-devel
On 8/24/23 03:02, Richard Henderson wrote:
> Remove the fixed size shm_regions[] array.
> Remove references when other mappings completely remove
> or replace a region.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Helge Deller <deller@gmx.de>
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [PATCH 00/13] linux-user patch queue
2023-09-01 2:32 ` [PATCH 00/13] linux-user patch queue Richard Henderson
@ 2023-09-01 15:12 ` Helge Deller
0 siblings, 0 replies; 23+ messages in thread
From: Helge Deller @ 2023-09-01 15:12 UTC (permalink / raw)
To: Richard Henderson, qemu-devel
On 9/1/23 04:32, Richard Henderson wrote:
> Ping.
Basic testing with my chroots seems to give no
problems, so for the series:
Tested-by: Helge Deller <deller@gmx.de>
Helge
>
> On 8/23/23 18:02, Richard Henderson wrote:
>> Combine a bunch of smaller linux-user patches:
>>
>> Supercedes: 20230801230842.414421-1-deller@gmx.de
>> ("[PATCH v2 0/3] linux-user: /proc/cpuinfo fix and content emulation for arm")
>> Supercedes: 20230807122206.655701-1-iii@linux.ibm.com
>> ("[PATCH v2] linux-user: Emulate the Anonymous: keyword in /proc/self/smaps")
>> Supercedes: 20230816181437.572997-1-richard.henderson@linaro.org
>> ("[PATCH 0/6] linux-user: Rewrite open_self_maps")
>> Supercedes: 20230820204408.327348-1-richard.henderson@linaro.org
>> ("[PATCH 0/4] linux-user: shmat/shmdt improvements")
>>
>> with some additions. Patches needing review:
>>
>> 01-linux-user-Split-out-cpu-target_proc.h.patch
>> 11-linux-user-Use-WITH_MMAP_LOCK_GUARD-in-target_-shmat.patch
>> 12-linux-user-Fix-shmdt.patch
>> 13-linux-user-Track-shm-regions-with-an-interval-tree.patch
>>
>>
>> r~
>>
>>
>> Helge Deller (2):
>> linux-user: Emulate /proc/cpuinfo on aarch64 and arm
>> linux-user: Emulate /proc/cpuinfo for Alpha
>>
>> Ilya Leoshkevich (1):
>> linux-user: Emulate the Anonymous: keyword in /proc/self/smaps
>>
>> Richard Henderson (10):
>> linux-user: Split out cpu/target_proc.h
>> util/selfmap: Use dev_t and ino_t in MapInfo
>> linux-user: Use walk_memory_regions for open_self_maps
>> linux-user: Adjust brk for load_bias
>> linux-user: Show heap address in /proc/pid/maps
>> linux-user: Remove ELF_START_MMAP and image_info.start_mmap
>> linux-user: Move shmat and shmdt implementations to mmap.c
>> linux-user: Use WITH_MMAP_LOCK_GUARD in target_{shmat,shmdt}
>> linux-user: Fix shmdt
>> linux-user: Track shm regions with an interval tree
>>
>> include/qemu/selfmap.h | 4 +-
>> linux-user/aarch64/target_proc.h | 1 +
>> linux-user/alpha/target_proc.h | 67 ++++
>> linux-user/arm/target_proc.h | 101 ++++++
>> linux-user/cris/target_proc.h | 1 +
>> linux-user/hexagon/target_proc.h | 1 +
>> linux-user/hppa/target_proc.h | 26 ++
>> linux-user/i386/target_proc.h | 1 +
>> linux-user/loader.h | 6 +-
>> linux-user/loongarch64/target_proc.h | 1 +
>> linux-user/m68k/target_proc.h | 16 +
>> linux-user/microblaze/target_proc.h | 1 +
>> linux-user/mips/target_proc.h | 1 +
>> linux-user/mips64/target_proc.h | 1 +
>> linux-user/nios2/target_proc.h | 1 +
>> linux-user/openrisc/target_proc.h | 1 +
>> linux-user/ppc/target_proc.h | 1 +
>> linux-user/qemu.h | 1 -
>> linux-user/riscv/target_proc.h | 37 ++
>> linux-user/s390x/target_proc.h | 109 ++++++
>> linux-user/sh4/target_proc.h | 1 +
>> linux-user/sparc/target_proc.h | 16 +
>> linux-user/user-mmap.h | 4 +
>> linux-user/x86_64/target_proc.h | 1 +
>> linux-user/xtensa/target_proc.h | 1 +
>> linux-user/elfload.c | 170 ++++++---
>> linux-user/mmap.c | 168 +++++++++
>> linux-user/syscall.c | 514 +++++++--------------------
>> util/selfmap.c | 12 +-
>> 29 files changed, 828 insertions(+), 437 deletions(-)
>> create mode 100644 linux-user/aarch64/target_proc.h
>> create mode 100644 linux-user/alpha/target_proc.h
>> create mode 100644 linux-user/arm/target_proc.h
>> create mode 100644 linux-user/cris/target_proc.h
>> create mode 100644 linux-user/hexagon/target_proc.h
>> create mode 100644 linux-user/hppa/target_proc.h
>> create mode 100644 linux-user/i386/target_proc.h
>> create mode 100644 linux-user/loongarch64/target_proc.h
>> create mode 100644 linux-user/m68k/target_proc.h
>> create mode 100644 linux-user/microblaze/target_proc.h
>> create mode 100644 linux-user/mips/target_proc.h
>> create mode 100644 linux-user/mips64/target_proc.h
>> create mode 100644 linux-user/nios2/target_proc.h
>> create mode 100644 linux-user/openrisc/target_proc.h
>> create mode 100644 linux-user/ppc/target_proc.h
>> create mode 100644 linux-user/riscv/target_proc.h
>> create mode 100644 linux-user/s390x/target_proc.h
>> create mode 100644 linux-user/sh4/target_proc.h
>> create mode 100644 linux-user/sparc/target_proc.h
>> create mode 100644 linux-user/x86_64/target_proc.h
>> create mode 100644 linux-user/xtensa/target_proc.h
>>
>
>
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [PATCH 03/13] linux-user: Emulate /proc/cpuinfo for Alpha
2023-08-24 1:02 ` [PATCH 03/13] linux-user: Emulate /proc/cpuinfo for Alpha Richard Henderson
@ 2025-01-21 10:39 ` Philippe Mathieu-Daudé
0 siblings, 0 replies; 23+ messages in thread
From: Philippe Mathieu-Daudé @ 2025-01-21 10:39 UTC (permalink / raw)
To: Richard Henderson, qemu-devel; +Cc: Helge Deller, Michael Cree
Hi Helge,
On 24/8/23 03:02, Richard Henderson wrote:
> From: Helge Deller <deller@gmx.de>
>
> Add emulation for /proc/cpuinfo for the alpha architecture.
>
> alpha output example:
>
> (alpha-chroot)root@p100:/# cat /proc/cpuinfo
> cpu : Alpha
> cpu model : ev67
> cpu variation : 0
> cpu revision : 0
> cpu serial number : JA00000000
> system type : QEMU
> system variation : QEMU_v8.0.92
> system revision : 0
> system serial number : AY00000000
> cycle frequency [Hz] : 250000000
> timer frequency [Hz] : 250.00
> page size [bytes] : 8192
> phys. address bits : 44
> max. addr. space # : 255
> BogoMIPS : 2500.00
> platform string : AlphaServer QEMU user-mode VM
> cpus detected : 8
> cpus active : 4
> cpu active mask : 0000000000000095
> L1 Icache : n/a
> L1 Dcache : n/a
> L2 cache : n/a
> L3 cache : n/a
>
> Cc: Michael Cree <mcree@orcon.net.nz>
> Signed-off-by: Helge Deller <deller@gmx.de>
> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
> Message-Id: <20230803214450.647040-4-deller@gmx.de>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> linux-user/alpha/target_proc.h | 68 +++++++++++++++++++++++++++++++++-
> 1 file changed, 67 insertions(+), 1 deletion(-)
>
> diff --git a/linux-user/alpha/target_proc.h b/linux-user/alpha/target_proc.h
> index 43fe29ca72..dac37dffc9 100644
> --- a/linux-user/alpha/target_proc.h
> +++ b/linux-user/alpha/target_proc.h
> @@ -1 +1,67 @@
> -/* No target-specific /proc support */
> +/*
> + * Alpha specific proc functions for linux-user
> + *
> + * SPDX-License-Identifier: GPL-2.0-or-later
> + */
> +#ifndef ALPHA_TARGET_PROC_H
> +#define ALPHA_TARGET_PROC_H
> +
> +static int open_cpuinfo(CPUArchState *cpu_env, int fd)
> +{
> + int max_cpus = sysconf(_SC_NPROCESSORS_CONF);
> + int num_cpus = sysconf(_SC_NPROCESSORS_ONLN);
> + unsigned long cpu_mask;
> + char model[32];
> + const char *p, *q;
> + int t;
> +
> + p = object_class_get_name(OBJECT_CLASS(CPU_GET_CLASS(env_cpu(cpu_env))));
Isn't it the same of:
p = object_get_typename(OBJECT(env_cpu(cpu_env)));
?
^ permalink raw reply [flat|nested] 23+ messages in thread
end of thread, other threads:[~2025-01-21 10:39 UTC | newest]
Thread overview: 23+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2023-08-24 1:02 [PATCH 00/13] linux-user patch queue Richard Henderson
2023-08-24 1:02 ` [PATCH 01/13] linux-user: Split out cpu/target_proc.h Richard Henderson
2023-09-01 14:35 ` Philippe Mathieu-Daudé
2023-08-24 1:02 ` [PATCH 02/13] linux-user: Emulate /proc/cpuinfo on aarch64 and arm Richard Henderson
2023-08-24 1:02 ` [PATCH 03/13] linux-user: Emulate /proc/cpuinfo for Alpha Richard Henderson
2025-01-21 10:39 ` Philippe Mathieu-Daudé
2023-08-24 1:02 ` [PATCH 04/13] util/selfmap: Use dev_t and ino_t in MapInfo Richard Henderson
2023-08-24 1:02 ` [PATCH 05/13] linux-user: Use walk_memory_regions for open_self_maps Richard Henderson
2023-08-24 1:02 ` [PATCH 06/13] linux-user: Adjust brk for load_bias Richard Henderson
2023-08-24 1:02 ` [PATCH 07/13] linux-user: Show heap address in /proc/pid/maps Richard Henderson
2023-09-01 14:39 ` Philippe Mathieu-Daudé
2023-08-24 1:02 ` [PATCH 08/13] linux-user: Emulate the Anonymous: keyword in /proc/self/smaps Richard Henderson
2023-09-01 14:37 ` Philippe Mathieu-Daudé
2023-08-24 1:02 ` [PATCH 09/13] linux-user: Remove ELF_START_MMAP and image_info.start_mmap Richard Henderson
2023-08-24 1:02 ` [PATCH 10/13] linux-user: Move shmat and shmdt implementations to mmap.c Richard Henderson
2023-08-24 1:02 ` [PATCH 11/13] linux-user: Use WITH_MMAP_LOCK_GUARD in target_{shmat, shmdt} Richard Henderson
2023-09-01 14:58 ` Helge Deller
2023-08-24 1:02 ` [PATCH 12/13] linux-user: Fix shmdt Richard Henderson
2023-09-01 14:38 ` Philippe Mathieu-Daudé
2023-08-24 1:02 ` [PATCH 13/13] linux-user: Track shm regions with an interval tree Richard Henderson
2023-09-01 15:10 ` Helge Deller
2023-09-01 2:32 ` [PATCH 00/13] linux-user patch queue Richard Henderson
2023-09-01 15:12 ` Helge Deller
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