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Re: [libvirt] [PATCH] qemu: Support OVMF on aarch64 guests



On Wed, Nov 19, 2014 at 11:17:30AM -0500, Cole Robinson wrote:
> On 11/19/2014 11:13 AM, Daniel P. Berrange wrote:
> >On Wed, Nov 19, 2014 at 10:40:09AM -0500, Cole Robinson wrote:
> >>On 11/19/2014 10:30 AM, Michal Privoznik wrote:
> >>>Currently, we are whitelisting architectures, that we know how to run
> >>>OVMF on. So far, only x86_64 was enabled. However, looking at qemu
> >>>code, the same commandline can be used to enable OVMF for aarch64.
> >>>
> >>>Signed-off-by: Michal Privoznik <mprivozn redhat com>
> >>>---
> >>>  src/qemu/qemu_command.c | 3 ++-
> >>>  1 file changed, 2 insertions(+), 1 deletion(-)
> >>>
> >>>diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
> >>>index d2e6991..ca57e35 100644
> >>>--- a/src/qemu/qemu_command.c
> >>>+++ b/src/qemu/qemu_command.c
> >>>@@ -7749,7 +7749,8 @@ qemuBuildDomainLoaderCommandLine(virCommandPtr cmd,
> >>>
> >>>      case VIR_DOMAIN_LOADER_TYPE_PFLASH:
> >>>          /* UEFI is supported only for x86_64 currently */
> >>>-        if (def->os.arch != VIR_ARCH_X86_64) {
> >>>+        if (def->os.arch != VIR_ARCH_X86_64 &&
> >>>+            def->os.arch != VIR_ARCH_AARCH64) {
> >>>              virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
> >>>                             _("pflash is not supported for %s guest architecture"),
> >>>                             virArchToString(def->os.arch));
> >>>
> >>
> >>Please add armv7hl as well, it should work completely identically (if/when
> >>we have an OS that supports it). ACK with that
> >
> >Really ? I thought ARM7 world was going to use its legacy BIOS
> >approach forever, only AArch64 going for UEFI approach.
> 
> There is arm32 support in UEFI, but I don't know if distros are ever going
> to do the work of adopting it, because real hw is all u-boot based.
> 
> But -M virt is very similar regardless of aarch64 or arm32, so _if_ anyone
> ever produces an arm32 disk image with uefi boot support, the qemu command
> line should be identical to the aarch64 WRT uefi/nvram/pflash. That's my
> understanding anyways

Ok, I guess it doesn't hurt to have it enabled for arm7 then, even if
no one is likely to use it

Regards,
Daniel
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