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| author | Tom Rini <trini@konsulko.com> | 2015-08-05 14:12:37 -0400 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2015-08-05 14:12:37 -0400 |
| commit | 1a2728ae4faf12874173de156b8a7e66cfbbeae5 (patch) | |
| tree | 9aba8e6c915b341df8ec6077d8ecb28f1eb32b0b /arch/x86/lib/tsc_timer.c | |
| parent | dcc7dbc73169bb4e39f27c1d95bbf031ccfc1744 (diff) | |
| parent | 12c7510f17ff29190e52336910e43a50c0d620a6 (diff) | |
Merge git://git.denx.de/u-boot-x86
Diffstat (limited to 'arch/x86/lib/tsc_timer.c')
| -rw-r--r-- | arch/x86/lib/tsc_timer.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86/lib/tsc_timer.c b/arch/x86/lib/tsc_timer.c index 7f5ba2ca6f..0df1af238c 100644 --- a/arch/x86/lib/tsc_timer.c +++ b/arch/x86/lib/tsc_timer.c @@ -355,7 +355,15 @@ void __udelay(unsigned long usec) stop = now + usec * get_tbclk_mhz(); while ((int64_t)(stop - get_ticks()) > 0) +#if defined(CONFIG_QEMU) && defined(CONFIG_SMP) + /* + * Add a 'pause' instruction on qemu target, + * to give other VCPUs a chance to run. + */ + asm volatile("pause"); +#else ; +#endif } int timer_init(void) |