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authorAlok Kataria <akataria@vmware.com>2008-11-03 11:31:28 -0800
committerH. Peter Anvin <hpa@zytor.com>2008-11-03 11:35:57 -0800
commit6bdbfe99916398dbb28d83833cc04757110f2738 (patch)
tree7783c666ff16ce70022946c070dd058ae2a74989 /drivers/firmware
parent395628ef4ea12ff0748099f145363b5e33c69acb (diff)
x86: VMware: Fix vmware_get_tsc code
Impact: Fix possible failure to calibrate the TSC on Vmware near 4 GHz The current version of the code to get the tsc frequency from the VMware hypervisor, will be broken on processor with frequency (4G-1) HZ, because on such processors eax will have UINT_MAX and that would be legitimate. We instead check that EBX did change to decide if we were able to read the frequency from the hypervisor. Signed-off-by: Alok N Kataria <akataria@vmware.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
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