Il 09/05/2012 15:53, H. Peter Anvin ha scritto: >> > It's true that it doesn't matter much but still it is a >> > regression. And it doesn't cause any kind of overhead >> > or bloat to fix this. >> > > However, the big thing is that we jump to the BIOS with caches off. I > personally think it is the wrong thing to do (we don't jump to the real > reset vector anyway) but it is what has been tested for a long time. I'm not sure I understand. The code has andl $0x60000000, %edx ; clear ET/PE jz 2f ... 2: andb $0x10, %dl ; clear CD/WT, %edx is always 0 What I've suggested is: testl $0x60000000, %edx jz 2f ... 2: andb $0x10, %dl ; clear PE only What would jump to the BIOS with caches on is: testl $0x60000000, %edx jz 2f ... 2: andl $0x10, %edx ; Clear CD/WT/PE Am I missing something? Paolo -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
