Always assume we run with an automatically translated physmap under XEN.

[jhb]

Test Plan

• universe built all kernels ok on amd64, i386, and pc98.

[royger]

Thanks for doing all this! I will try to test the patch this afternoon. I'm also going to be on vacation next week (without Internet or laptop).

sys/dev/xen/netfront/netfront.c

1002

This chunk is wrong and should be removed. I guess the extra "!" in the if condition was a mistake. The __HYPERVISOR_mmu_update hypercall is not available for auto-translated guests.

sys/xen/gnttab.h

127

GNTMAP_contains_pte is not available for auto-translated guests, in fact we should add a check like:

if (flags & (GNTMAP_device_map|GNTMAP_application_map|GNTMAP_contains_pte) != 0)
    panic("Invalid grant table flags specified");

But that can be done later.

[royger]

Building HEAD is currently broken, and I have to leave ASAP, so I won't be able to test it until the 15th (a week from now). Feel free to commit it.

[jhb]

Ok, I'll do the gnttab thing as a followup to this one.

sys/dev/xen/netfront/netfront.c

995–996

I wonder if the !! in the old code was actually a bug and if this code is supposed to only be present for the !auto case? If so then I can remove some more bits such as the rx_mcl and rx_mmu arrays from the softc.

[jhb]

Remove MMU update hypercall.

[jhb]

Update.

[jhb]

Compile fixes.