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On error IOCTL_PRIVCMD_MMAPBATCH is expected to set the top nibble of
the effected MFN and return 0. Currently it leaves the MFN unmodified
and returns the number of failures. Therefore:
- reimplement remap_domain_mfn_range() using direct
HYPERVISOR_mmu_update() calls and small batches. The xen_set_domain_pte()
interface does not report errors and since some failures are
expected/normal using the multicall infrastructure is too noisy.
- return 0 as expected
- writeback the updated MFN list to mmapbatch->arr not over mmapbatch,
smashing the caller's stack.
- remap_domain_mfn_range can be static.
With this change I am able to start an HVM domain.
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
f020e29051