| Message ID | Y5juEOgG2Jnad1j9@p100 (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2] linux-user: Fix /proc/cpuinfo output for sparc and hppa | expand |
On 12/13/22 22:26, Helge Deller wrote: > The sparc and hppa architectures provide an own output for the emulated > /proc/cpuinfo file. > > Some userspace applications count (even if that's not the recommended > way) the number of lines which start with "processor:" and assume that > this number then reflects the number of online CPUs. Since those 3 > architectures don't provide any such line, applications may assume "0" > CPUs. One such issue can be seen in debian bug report: > https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1024653 > > Avoid such issues by adding a "processor:" line for each of the online > CPUs. > > Signed-off-by: Helge Deller <deller@gmx.de> > > --- > v2: > - drop m68k part (based on feedback from Laurent Vivier <laurent@vivier.eu>) > - change commit message > > > diff --git a/linux-user/syscall.c b/linux-user/syscall.c > index 9e2c0a18fc..d58e9b8d10 100644 > --- a/linux-user/syscall.c > +++ b/linux-user/syscall.c > @@ -8299,7 +8299,13 @@ static int open_net_route(CPUArchState *cpu_env, int fd) > #if defined(TARGET_SPARC) > static int open_cpuinfo(CPUArchState *cpu_env, int fd) > { > - dprintf(fd, "type\t\t: sun4u\n"); > + int i, num_cpus; > + > + num_cpus = sysconf(_SC_NPROCESSORS_ONLN); > + for (i = 0; i < num_cpus; i++) { > + dprintf(fd, "%sprocessor\t: %d\n", (i > 0) ? "\n":"", i); it turned out, that the procps tools expect the /proc/cpuinfo file to have a trailing \n at the end of the file. So, I'll respin this patch and send a v3 version to replace this conditional \n-output. Same applies for the hppa arch..... > + dprintf(fd, "type\t\t: sun4u\n"); > + } > return 0; > } > #endif > @@ -8307,11 +8313,17 @@ static int open_cpuinfo(CPUArchState *cpu_env, int fd) > #if defined(TARGET_HPPA) > static int open_cpuinfo(CPUArchState *cpu_env, int fd) > { > - 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\n"); > - dprintf(fd, "model name\t: Merlin L2 160 QEMU (9000/778/B160L)\n"); > + int i, num_cpus; > + > + num_cpus = sysconf(_SC_NPROCESSORS_ONLN); > + for (i = 0; i < num_cpus; i++) { > + dprintf(fd, "%sprocessor\t: %d\n", (i > 0) ? "\n":"", i); ^^ here. Helge > + 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"); > + } > return 0; > } > #endif
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 9e2c0a18fc..d58e9b8d10 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -8299,7 +8299,13 @@ static int open_net_route(CPUArchState *cpu_env, int fd) #if defined(TARGET_SPARC) static int open_cpuinfo(CPUArchState *cpu_env, int fd) { - dprintf(fd, "type\t\t: sun4u\n"); + int i, num_cpus; + + num_cpus = sysconf(_SC_NPROCESSORS_ONLN); + for (i = 0; i < num_cpus; i++) { + dprintf(fd, "%sprocessor\t: %d\n", (i > 0) ? "\n":"", i); + dprintf(fd, "type\t\t: sun4u\n"); + } return 0; } #endif @@ -8307,11 +8313,17 @@ static int open_cpuinfo(CPUArchState *cpu_env, int fd) #if defined(TARGET_HPPA) static int open_cpuinfo(CPUArchState *cpu_env, int fd) { - 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\n"); - dprintf(fd, "model name\t: Merlin L2 160 QEMU (9000/778/B160L)\n"); + int i, num_cpus; + + num_cpus = sysconf(_SC_NPROCESSORS_ONLN); + for (i = 0; i < num_cpus; i++) { + dprintf(fd, "%sprocessor\t: %d\n", (i > 0) ? "\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"); + } return 0; } #endif
The sparc and hppa architectures provide an own output for the emulated /proc/cpuinfo file. Some userspace applications count (even if that's not the recommended way) the number of lines which start with "processor:" and assume that this number then reflects the number of online CPUs. Since those 3 architectures don't provide any such line, applications may assume "0" CPUs. One such issue can be seen in debian bug report: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1024653 Avoid such issues by adding a "processor:" line for each of the online CPUs. Signed-off-by: Helge Deller <deller@gmx.de> --- v2: - drop m68k part (based on feedback from Laurent Vivier <laurent@vivier.eu>) - change commit message