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[hyperv] Do not fail if guest OS ID MSR is already set 

Signed-off-by: Michael Brown <mcb30@ipxe.org>
pull/8/merge
Michael Brown 2017-04-25 13:33:52 +01:00
parent 648657b776
commit a0f6e75532
1 changed files with 1 additions and 2 deletions
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3
src/arch/x86/drivers/hyperv/hyperv.c
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@ -245,9 +245,8 @@ static int hv_map_hypercall ( struct hv_hypervisor *hv ) {
/* Report guest OS identity */ /* Report guest OS identity */
guest_os_id = rdmsr ( HV_X64_MSR_GUEST_OS_ID ); guest_os_id = rdmsr ( HV_X64_MSR_GUEST_OS_ID );
if ( guest_os_id != 0 ) { 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 ); hv, guest_os_id );
return -EBUSY;
} }
guest_os_id = HV_GUEST_OS_ID_IPXE; guest_os_id = HV_GUEST_OS_ID_IPXE;
DBGC2 ( hv, "HV %p guest OS ID MSR is %#08llx\n", hv, guest_os_id ); DBGC2 ( hv, "HV %p guest OS ID MSR is %#08llx\n", hv, guest_os_id );