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Always assume we run with an automatically translated physmap under XEN.
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Authored by jhb on Aug 6 2015, 7:43 PM.
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Details

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

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rS FreeBSD src repository - subversion
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Buildable 27
Build 27: arc lint + arc unit

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jhb retitled this revision from to Always assume we run with an automatically translated physmap under XEN..
jhb updated this object.
jhb edited the test plan for this revision. (Show Details)
jhb added a reviewer: 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 edited edge metadata.

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.

This revision is now accepted and ready to land.Aug 7 2015, 4:54 PM
jhb marked an inline comment as done.Aug 8 2015, 4:12 PM

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 edited edge metadata.

Remove MMU update hypercall.

This revision now requires review to proceed.Aug 8 2015, 4:12 PM
jhb edited edge metadata.

Update.

This revision was automatically updated to reflect the committed changes.