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Enable IA32 emulation in the generic x86_64 firmware so 32-bit guest applications can run alongside 64-bit processes. IA32_EMULATION allows 32-bit programs to run, but does not provide legacy time32 syscalls when COMPAT_32BIT_TIME is disabled. The i386 futex syscall uses sys_futex_time32 even for operations that do not pass a timeout. Steam's 32-bit client aborts on Linux 6.12.91 because its first FUTEX_WAKE_PRIVATE call returns ENOSYS. Enable COMPAT_32BIT_TIME to provide the legacy syscall ABI expected by this client and other 32-bit applications built against it. Signed-off-by: Joseph Kogut <joseph.kogut@gmail.com>
jakogut
requested review from
MatiasVara,
jakecorrenti,
slp and
tylerfanelli
as code owners
September 22, 2026 19:01
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Enable IA32 emulation in the generic x86_64 firmware so 32-bit guest applications can run alongside 64-bit processes.
IA32_EMULATION allows 32-bit programs to run, but does not provide legacy time32 syscalls when COMPAT_32BIT_TIME is disabled. The i386 futex syscall uses sys_futex_time32 even for operations that do not pass a timeout.
Steam's 32-bit client aborts on Linux 6.12.91 because its first FUTEX_WAKE_PRIVATE call returns ENOSYS. Enable COMPAT_32BIT_TIME to provide the legacy syscall ABI expected by this client and other 32-bit applications built against it.