diff options
Diffstat (limited to 'qemu-options.hx')
| -rw-r--r-- | qemu-options.hx | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/qemu-options.hx b/qemu-options.hx index 5eaba11cbc..4be98f71df 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -171,11 +171,13 @@ Set parameter @var{arg} for item @var{id} of type @var{group}\n" ETEXI DEF("global", HAS_ARG, QEMU_OPTION_global, - "-global driver.prop=value\n" + "-global driver.property=value\n" + "-global driver=driver,property=property,value=value\n" " set a global default for a driver property\n", QEMU_ARCH_ALL) STEXI @item -global @var{driver}.@var{prop}=@var{value} +@itemx -global driver=@var{driver},property=@var{property},value=@var{value} @findex -global Set default value of @var{driver}'s property @var{prop} to @var{value}, e.g.: @@ -186,6 +188,9 @@ qemu-system-i386 -global ide-drive.physical_block_size=4096 -drive file=file,if= In particular, you can use this to set driver properties for devices which are created automatically by the machine model. To create a device which is not created automatically and set properties on it, use -@option{device}. + +The two syntaxes are equivalent. The longer one works for drivers whose name +contains a dot. ETEXI DEF("boot", HAS_ARG, QEMU_OPTION_boot, @@ -3099,9 +3104,10 @@ re-inject them. ETEXI DEF("icount", HAS_ARG, QEMU_OPTION_icount, \ - "-icount [shift=N|auto][,align=on|off]\n" \ + "-icount [shift=N|auto][,align=on|off][,sleep=no]\n" \ " enable virtual instruction counter with 2^N clock ticks per\n" \ - " instruction and enable aligning the host and virtual clocks\n", QEMU_ARCH_ALL) + " instruction, enable aligning the host and virtual clocks\n" \ + " or disable real time cpu sleeping\n", QEMU_ARCH_ALL) STEXI @item -icount [shift=@var{N}|auto] @findex -icount @@ -3110,6 +3116,13 @@ instruction every 2^@var{N} ns of virtual time. If @code{auto} is specified then the virtual cpu speed will be automatically adjusted to keep virtual time within a few seconds of real time. +When the virtual cpu is sleeping, the virtual time will advance at default +speed unless @option{sleep=no} is specified. +With @option{sleep=no}, the virtual time will jump to the next timer deadline +instantly whenever the virtual cpu goes to sleep mode and will not advance +if no timer is enabled. This behavior give deterministic execution times from +the guest point of view. + Note that while this option can give deterministic behavior, it does not provide cycle accurate emulation. Modern CPUs contain superscalar out of order cores with complex cache hierarchies. The number of instructions |