Hi Heinrich, On Thu, Oct 11, 2018 at 11:15 PM Heinrich Schuchardt <xypron.g...@gmx.de> wrote: > > On 10/11/2018 03:53 AM, Bin Meng wrote: > > Currently only 32-bit U-Boot for QEMU x86 is documented. Mention > > the 64-bit support. > > > > Signed-off-by: Bin Meng <bmeng...@gmail.com> > > --- > > > > doc/README.x86 | 8 ++++++-- > > 1 file changed, 6 insertions(+), 2 deletions(-) > > > > diff --git a/doc/README.x86 b/doc/README.x86 > > index 8cc4672..ab48466 100644 > > --- a/doc/README.x86 > > +++ b/doc/README.x86 > > @@ -32,7 +32,7 @@ are supported: > > - Link (Chromebook Pixel) > > - Minnowboard MAX > > - Samus (Chromebook Pixel 2015) > > - - QEMU x86 > > + - QEMU x86 (32-bit & 64-bit) > > > > As for loading an OS, U-Boot supports directly booting a 32-bit or 64-bit > > Linux kernel as part of a FIT image. It also supports a compressed zImage. > > @@ -376,7 +376,9 @@ QEMU x86 target instructions for bare mode: > > > > To build u-boot.rom for QEMU x86 targets, just simply run > > > > -$ make qemu-x86_defconfig > > +$ make qemu-x86_defconfig (for 32-bit) > > +or > > +$ make qemu-x86_64_defconfig (for 64-bit) > > $ make all > > If your patch series creates a U-Boot usable with QEMU depends on the > chosen CPU: > > This one seems to work: > qemu-system-x86_64 -bios u-boot.rom -nographic -cpu core2duo > > This one fails (as expected): > qemu-system-x86_64 -bios u-boot.rom --nographic -cpu pentium
Pentium does not support 64-bit, so it is expected. In my testing I always omit the '-cpu' so this is not a problem. But I can document this. > > I could not get the emulation running without -nographic. Do you know why? > This is due to currently the VGA support is missing in the 64-bit U-Boot. > The documentation above is insufficient. Please, provide a minimum QEMU > command line which includes a CPU specification. > > I would prefer if you could specify two lines per bitness - one with kvm > and one without, e.g. I doubt -enable-kvm works with U-Boot. > > qemu-system-x86_64 -bios u-boot.rom -nographic -enable-kvm -cpu host > qemu-system-x86_64 -bios u-boot.rom -nographic -cpu core2duo > > qemu-system-i386 -bios u-boot.rom -nographic -enable-kvm -cpu host > qemu-system-i386 -bios u-boot.rom -nographic -cpu core2duo > Will add more info in v2. Regards, Bin _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
