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Michael Brown 121d96b903 [cpuid] Allow reading hypervisor CPUID leaves 
Hypervisors typically intercept CPUID leaves in the range 0x40000000
to 0x400000ff, with leaf 0x40000000 returning the maximum supported
function within this range in register %eax.

iPXE currently masks off bit 30 from the requested CPUID leaf when
checking to see if a function is supported, which causes this check to
read from leaf 0x00000000 instead of 0x40000000.

Fix by including bit 30 within the mask.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
 		2024-08-01 12:49:48 +01:00
.github/workflows [ci] Update action versions to silence GitHub warnings 2024-03-07 23:25:35 +00:00
contrib [cloud] Add utility to read INT13CON partition in Google Compute Engine 2024-07-30 16:11:28 +01:00
src [cpuid] Allow reading hypervisor CPUID leaves 2024-08-01 12:49:48 +01:00
COPYING [legal] Update GPLv2 licence text 2015-02-26 17:59:53 +00:00
COPYING.GPLv2 [legal] Update GPLv2 licence text 2015-02-26 17:59:53 +00:00
COPYING.UBDL [legal] Add support for the Unmodified Binary Distribution Licence 2015-03-02 12:07:14 +00:00
README [doc] Re-add README file 2010-05-28 00:03:47 +01:00

README 

iPXE README File

Quick start guide:

   cd src
   make

For any more detailed instructions, see http://ipxe.org