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| author | Sebastian Andrzej Siewior <[email protected]> | 2022-11-25 09:42:14 +0000 |
|---|---|---|
| committer | Thomas Gleixner <[email protected]> | 2023-02-06 14:48:54 +0000 |
| commit | 717cce3bdcf34705417f641bf2fcdf9b038ec36c (patch) | |
| tree | ce78b376b3e6ddc1e8b151ed5f46acd61750f213 /lib/string.c | |
| parent | x86/vdso: Move VDSO image init to vdso2c generated code (diff) | |
| download | kernel-717cce3bdcf34705417f641bf2fcdf9b038ec36c.tar.gz kernel-717cce3bdcf34705417f641bf2fcdf9b038ec36c.zip | |
x86/cpu: Provide the full setup for getcpu() on x86-32
setup_getcpu() configures two things:
- it writes the current CPU & node information into MSR_TSC_AUX
- it writes the same information as a GDT entry.
By using the "full" setup_getcpu() on i386 it is possible to read the CPU
information in userland via RDTSCP() or via LSL from the GDT.
Provide an GDT_ENTRY_CPUNODE for x86-32 and make the setup function
unconditionally available.
Signed-off-by: Sebastian Andrzej Siewior <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Roland Mainz <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Diffstat (limited to 'lib/string.c')
0 files changed, 0 insertions, 0 deletions