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| author | Jason Lowe-Power <jason@lowepower.com> | 2017-07-25 13:12:27 -0500 |
|---|---|---|
| committer | Jason Lowe-Power <jason@lowepower.com> | 2018-03-15 20:45:34 +0000 |
| commit | 1723e8ecc28ee8b55c9b8008456726f60ea8fcc2 (patch) | |
| tree | 62ebda1688fa43b10c586744b53aae0eb54ca02a | |
| parent | 65d0a6b3accbb168300d9c4f18845e6fb8a96e77 (diff) | |
| download | gem5-1723e8ecc28ee8b55c9b8008456726f60ea8fcc2.tar.xz | |
sim-se: Add /sys/devices/system/cpu/online file
Add the special file /sys/devices/system/cpu/online to the files that gem5
knows how to handle in SE mode. This file lists the CPUs that are active.
For instance, in an 8 CPU system it is the following:
0-7
This implementation simply returns a file that is 0-%d where %d is the
current number of thread contexts.
This file is required for C++11 threads with gcc 4.8 and above.
Change-Id: I0b566f77e75e9eca480509814d0fd038a231b940
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Reviewed-on: https://gem5-review.googlesource.com/8902
Reviewed-by: Gabe Black <gabeblack@google.com>
Reviewed-by: Brandon Potter <Brandon.Potter@amd.com>
Maintainer: Brandon Potter <Brandon.Potter@amd.com>
| -rw-r--r-- | src/kern/linux/linux.cc | 10 | ||||
| -rw-r--r-- | src/kern/linux/linux.hh | 1 |
2 files changed, 11 insertions, 0 deletions
diff --git a/src/kern/linux/linux.cc b/src/kern/linux/linux.cc index bd0b4d09a..d571b81a1 100644 --- a/src/kern/linux/linux.cc +++ b/src/kern/linux/linux.cc @@ -55,6 +55,9 @@ Linux::openSpecialFile(std::string path, Process *process, } else if (path.compare(0, 11, "/etc/passwd") == 0) { data = Linux::etcPasswd(process, tc); matched = true; + } else if (path.compare(0, 30, "/sys/devices/system/cpu/online") == 0) { + data = Linux::cpuOnline(process, tc); + matched = true; } if (matched) { @@ -87,3 +90,10 @@ Linux::etcPasswd(Process *process, ThreadContext *tc) return csprintf("gem5-user:x:1000:1000:gem5-user,,,:%s:/bin/bash\n", process->getcwd()); } + +std::string +Linux::cpuOnline(Process *process, ThreadContext *tc) +{ + return csprintf("0-%d\n", + tc->getSystemPtr()->numContexts() - 1); +} diff --git a/src/kern/linux/linux.hh b/src/kern/linux/linux.hh index b24ee3895..a1df99467 100644 --- a/src/kern/linux/linux.hh +++ b/src/kern/linux/linux.hh @@ -227,6 +227,7 @@ class Linux : public OperatingSystem ThreadContext *tc); static std::string procMeminfo(Process *process, ThreadContext *tc); static std::string etcPasswd(Process *process, ThreadContext *tc); + static std::string cpuOnline(Process *process, ThreadContext *tc); // For futex system call static const unsigned TGT_FUTEX_WAIT = 0; |