On 2 August 2015 at 15:24, Simon Glass <s...@chromium.org> wrote: > On 27 July 2015 at 05:16, Bin Meng <bmeng...@gmail.com> wrote: >> From: Miao Yan <yanmiaob...@gmail.com> >> >> When running SMP configuration on QEMU (tcg mode, no kvm), there is >> a busy loop in start_aps(), calling udelay(), that waits for APs to >> show up online. However, there is a chance that VCPU1 will be timeout >> waiting, IOW the secondary VCPUs haven't started their execution yet. >> >> This patch adds a 'pause' instruction in __udelay() only for QEMU >> target, to give other VCPUs a chance to run. When QEMU sees the >> 'pause' instruction, it will yeild the execution to other CPUs. >> >> Signed-off-by: Miao Yan <yanmiaob...@gmail.com> >> Signed-off-by: Bin Meng <bmeng...@gmail.com> >> --- >> >> arch/x86/lib/tsc_timer.c | 8 ++++++++ >> 1 file changed, 8 insertions(+) > > Acked-by: Simon Glass <s...@chromium.org> > Tested-by: Simon Glass <s...@chromium.org>
Applied to u-boot-x86, thanks! _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
