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boards: qemu_x86: enable icount mode

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Enable icount mode for qemu_x86 platform, The icount shift value is
selectd based on cpu clock frequency of this platform. The virtual
cpu will execute one instruction every 2^shift ns of virtual time.

Signed-off-by: Wentong Wu <wentong.wu@intel.com>
This commit is contained in:
Wentong Wu 2020-05-09 03:37:36 +08:00 • committed by Carles Cufí
commit 56c8f49b5c
1 changed files with 3 additions and 0 deletions
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3
boards/x86/qemu_x86/board.cmake
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@ -11,6 +11,9 @@ if(CONFIG_X86_64)
set(QEMU_CPU_TYPE_${ARCH} qemu64,+x2apic)
else()
set(QEMU_CPU_TYPE_${ARCH} qemu32,+nx,+pae)
if(CONFIG_QEMU_ICOUNT)
list(APPEND QEMU_EXTRA_FLAGS -icount shift=5,align=off,sleep=off -rtc clock=vm)
endif()
endif()
set(QEMU_FLAGS_${ARCH}