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| author | Alok Kataria <akataria@vmware.com> | 2008-11-03 11:31:28 -0800 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2008-11-03 11:35:57 -0800 |
| commit | 6bdbfe99916398dbb28d83833cc04757110f2738 (patch) | |
| tree | 7783c666ff16ce70022946c070dd058ae2a74989 /drivers/firmware | |
| parent | 395628ef4ea12ff0748099f145363b5e33c69acb (diff) | |
| download | linux-6bdbfe99916398dbb28d83833cc04757110f2738.tar.gz linux-6bdbfe99916398dbb28d83833cc04757110f2738.tar.bz2 linux-6bdbfe99916398dbb28d83833cc04757110f2738.zip | |
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>
Diffstat (limited to 'drivers/firmware')
0 files changed, 0 insertions, 0 deletions