Workstation User’s Manual : Introduction and System Requirements : Host System Requirements : Host Operating System

Host Operating System
VMware Workstation is available for Windows and Linux host operating systems. VMware ACE features are included only in the version of Workstation that runs on Windows hosts.
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Windows Host Operating Systems
Workstation supports the following Windows 32-bit and 64-bit host operating systems.
 
Linux Host Operating Systems
Workstation supports the following Linux 32-bit and 64-bit distributions and kernels for the host operating systems. Workstation might not run on systems that do not meet these requirements.
As newer Linux kernels and distributions are released, VMware modifies and tests its products for stability and reliability on those host platforms. VMware makes every effort to add support for new kernels and distributions in a timely manner, but until a kernel or distribution is added to the following list, its use with VMware products is not supported. Look for newer prebuilt modules in the Downloads area of the VMware Web site.
In Workstation 7.0, only Linux kernels version 2.6.9 and later are supported.
 
Note: On 64-bit Mandriva hosts, some 32-bit compatibility libraries are required. Specifically, 32-bit glibc, X11, and libXtst.so are required.
Note: On 64-bit Ubuntu 6.x hosts, some 32-bit compatibility libraries are required. Specifically, 32-bit glibc and X11 are required.