Miao Yan 417576c2f1 x86: Add a 'pause' instruction in __udelay() for QEMU target ... 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>		2015-08-05 08:42:38 -06:00
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cpu	x86: qemu: Turn on PCIe ECAM address range decoding on Q35	2015-07-28 10:36:25 -06:00
dts	x86: qemu: Enable writing MP table	2015-07-28 10:36:25 -06:00
include/asm	x86: qemu: Turn on PCIe ECAM address range decoding on Q35	2015-07-28 10:36:25 -06:00
lib	x86: Add a 'pause' instruction in __udelay() for QEMU target	2015-08-05 08:42:38 -06:00
config.mk	generic-board: move __HAVE_ARCH_GENERIC_BOARD to Kconfig	2015-03-28 09:03:08 -04:00
Kconfig	x86: Reserve PCIe ECAM address range in the E820 table	2015-07-28 10:36:25 -06:00
Makefile	Kbuild: introduce Makefile in arch/$ARCH/	2014-12-08 09:35:45 -05:00