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[hyperv] Do not fail if guest OS ID MSR is already set
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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mcb30 committed Apr 26, 2017
1 parent 648657b commit a0f6e75532c68f49b3e1c73ca88151d9663f5269
Showing with 1 addition and 2 deletions.
  1. +1 −2 src/arch/x86/drivers/hyperv/hyperv.c
@@ -245,9 +245,8 @@ static int hv_map_hypercall ( struct hv_hypervisor *hv ) {
/* Report guest OS identity */
guest_os_id = rdmsr ( HV_X64_MSR_GUEST_OS_ID );
if ( guest_os_id != 0 ) {
DBGC ( hv, "HV %p guest OS ID MSR already set to %#08llx\n",
DBGC ( hv, "HV %p guest OS ID MSR was %#08llx\n",
hv, guest_os_id );
return -EBUSY;
}
guest_os_id = HV_GUEST_OS_ID_IPXE;
DBGC2 ( hv, "HV %p guest OS ID MSR is %#08llx\n", hv, guest_os_id );

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