direct-io.hg
changeset 3379:275b77086005
bitkeeper revision 1.1159.213.2 (41dc5bb8NoFeyC8xMcZdstILsQ-Tqg)
patch from Leendert van Doorn <leendert@watson.ibm.com>
Hyperthreading on VMX is broken in the xeno-unstable.bk tree. The diff
below fixes this.
It turns out that the mtrr code clears too many bits, some of them cause
Xen to crash. Being a bit more precise fixes the problem.
patch from Leendert van Doorn <leendert@watson.ibm.com>
Hyperthreading on VMX is broken in the xeno-unstable.bk tree. The diff
below fixes this.
It turns out that the mtrr code clears too many bits, some of them cause
Xen to crash. Being a bit more precise fixes the problem.
| author | iap10@labyrinth.cl.cam.ac.uk |
|---|---|
| date | Wed Jan 05 21:27:20 2005 +0000 (2005-01-05) |
| parents | 6aadc1c26a93 |
| children | e17a946c7a91 |
| files | xen/arch/x86/mtrr/generic.c |
line diff
1.1 --- a/xen/arch/x86/mtrr/generic.c Tue Jan 04 16:39:35 2005 +0000 1.2 +++ b/xen/arch/x86/mtrr/generic.c Wed Jan 05 21:27:20 2005 +0000 1.3 @@ -250,7 +250,7 @@ static void prepare_set(void) 1.4 /* Save value of CR4 and clear Page Global Enable (bit 7) */ 1.5 if ( cpu_has_pge ) { 1.6 cr4 = read_cr4(); 1.7 - write_cr4(cr4 & (unsigned char) ~(1 << 7)); 1.8 + write_cr4(cr4 & ~X86_CR4_PGE); 1.9 } 1.10 1.11 /* Flush all TLBs via a mov %cr3, %reg; mov %reg, %cr3 */