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Michael Brown 936657832f [hyperv] Do not steal ownership from the Gen 2 UEFI firmware ... We must not steal ownership from the Gen 2 UEFI firmware, since doing so will cause an immediate system crash (most likely in the form of a reboot). This problem was masked before commit a0f6e75 ("[hyperv] Do not fail if guest OS ID MSR is already set"), since prior to that commit we would always fail if we found any non-zero guest OS identity. We now accept a non-zero previous guest OS identity in order to allow for situations such as chainloading from iPXE to another iPXE, and as a prerequisite for commit b91cc98 ("[hyperv] Cope with Windows Server 2016 enlightenments"). A proper fix would be to reverse engineer the UEFI protocols exposed within the Hyper-V Gen 2 firmware and use these to bind to the VMBus device representing the network connection, (with the native Hyper-V driver moved to become a BIOS-only feature). As an interim solution, fail to initialise the native Hyper-V driver if we detect the guest OS identity known to be used by the Gen 2 UEFI firmware. This will cause the standard all-drivers build (ipxe.efi) to fall back to using the SNP driver. Signed-off-by: Michael Brown <mcb30@ipxe.org>		2017-07-28 21:30:43 +01:00
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core	[cpuid] Allow input %ecx value to be specified	2017-06-16 01:17:48 +01:00
drivers	[hyperv] Do not steal ownership from the Gen 2 UEFI firmware	2017-07-28 21:30:43 +01:00
hci/commands	[bios] Add bin-x86_64-pcbios build platform	2016-02-16 19:32:32 +00:00
image	[build] Avoid implicit-fallthrough warnings on GCC 7	2017-03-29 10:36:45 +03:00
include	[cpuid] Allow input %ecx value to be specified	2017-06-16 01:17:48 +01:00
interface	[acpi] Make acpi_find_rsdt() a per-platform method	2017-05-23 18:34:39 +01:00
prefix	[hdprefix] Avoid attempts to read beyond the end of the disk	2017-06-14 12:14:54 +01:00
scripts	[efi] Centralise architecture-independent EFI Makefile and linker script	2016-03-12 21:47:13 +00:00
tests/comboot	[comboot] Support COMBOOT in 64-bit builds	2016-04-15 15:31:36 +01:00
transitions	[librm] Fail gracefully if asked to ioremap() a zero length	2017-03-21 14:17:18 +02:00
Makefile	[undi] Move PXE API caller back into UNDI driver	2017-03-19 15:57:24 +00:00
Makefile.efi	[efi] Centralise architecture-independent EFI Makefile and linker script	2016-03-12 21:47:13 +00:00
Makefile.linux	[build] Avoid errors when build directory is mounted via NFS	2014-05-13 16:45:57 +01:00
Makefile.pcbios	[build] Add %.vhd target for building VM bootable disk images	2017-01-22 11:22:11 +00:00