x86: qemu: Add MP initialization

[J-u-boot.git] / doc / README.x86

diff --git a/doc/README.x86 b/doc/README.x86
index 5d712445df5c6222106898713074eda5394cb5ed..1cab42cc41f7386be3ec7c1b223ca72c433b5ae8 100644 (file)
--- a/doc/README.x86
+++ b/doc/README.x86
@@ -281,6 +281,11 @@ QEMU emulates a graphic card which U-Boot supports. Removing '-nographic' will
 show QEMU's VGA console window. Note this will disable QEMU's serial output.
 If you want to check both consoles, use '-serial stdio'.
 
+Multicore is also supported by QEMU via '-smp n' where n is the number of cores
+to instantiate. Currently the default U-Boot built for QEMU supports 2 cores.
+In order to support more cores, you need add additional cpu nodes in the device
+tree and change CONFIG_MAX_CPUS accordingly.
+
 CPU Microcode
 -------------
 Modern CPUs usually require a special bit stream called microcode [8] to be