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![]() 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 <yanmiaobest@gmail.com> Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Acked-by: Simon Glass <sjg@chromium.org> Tested-by: Simon Glass <sjg@chromium.org> |
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avr32 | ||
blackfin | ||
m68k | ||
microblaze | ||
mips | ||
nds32 | ||
nios2 | ||
openrisc | ||
powerpc | ||
sandbox | ||
sh | ||
sparc | ||
x86 | ||
.gitignore | ||
Kconfig |