Re: [Qemu-devel] [PATCH, RFT] monitor: implement x86 info tlb for PAE and long modes
On Tue, Dec 7, 2010 at 10:08 AM, Alexander Graf ag...@suse.de wrote: On 06.12.2010, at 19:38, Blue Swirl wrote: On Mon, Dec 6, 2010 at 11:12 AM, Alexander Graf ag...@suse.de wrote: On 05.12.2010, at 17:25, Blue Swirl wrote: 'info tlb' didn't show correct information for PAE mode and x86_64 long mode. Implement the missing modes. Also print NX bit for PAE and long modes. Fix off-by-one error in 32 bit mode mask. Signed-off-by: Blue Swirl blauwir...@gmail.com --- I didn't find an OS that enabled PAE, please test and report. Xen does. Just take a random recent xen kernel and run it with -kernel :). Thanks, it does (CR4 is 0xb0). I'm not sure all is correct, after 0x100 the dump looks messy: 00c0: 00c0 --PDA---W 00e0: 00e0 --PDA---W 0100: f000ff53f000f000 XG-D-C--W 01001000: f000ff53f000e000 X--DW 01002000: f000ff53f000f000 XG-D-C--W 01003000: f000ff53f000f000 XG-D-C--W 01004000: f000e987f000f000 X---A--U- Good question XD. I guess the best way to find out if those numbers are right would be to trace the page tables manually. Those were actually caused by a bug of not checking the P bit for intermediate tables, this was fixed in the second version. info tlb shows PA : VA, right? No, VA : PA.
Re: [Qemu-devel] [PATCH, RFT] monitor: implement x86 info tlb for PAE and long modes
On Mon, 2010-12-06 at 18:41 +, Blue Swirl wrote: On Mon, Dec 6, 2010 at 1:05 PM, Ian Campbell i...@hellion.org.uk wrote: On Mon, 2010-12-06 at 12:12 +0100, Alexander Graf wrote: On 05.12.2010, at 17:25, Blue Swirl wrote: 'info tlb' didn't show correct information for PAE mode and x86_64 long mode. Implement the missing modes. Also print NX bit for PAE and long modes. Fix off-by-one error in 32 bit mode mask. Signed-off-by: Blue Swirl blauwir...@gmail.com --- I didn't find an OS that enabled PAE, please test and report. Xen does. Just take a random recent xen kernel and run it with -kernel :). In addition AFAIK recent 32 bit Fedora is PAE enabled by default (so is RHEL6?). Debian also supplies a -686-bigmem kernel flavour which is their name for PAE enabled. At least Fedora 14 installation CD kernel does not enable PAE with 5G of memory (enabled for i386 by adjusting target_phys_bits in configure). Hm, seems like I was mistaken and it was just RHEL6 which changed the default. FWIW Fedora-14-i386-DVD.iso contains /images/pxeboot/vmlinuz-PAE and initrd-PAE.img which might be useful to you, see also http://download.fedora.redhat.com/pub/fedora/linux/releases/14/Fedora/i386/os/images/pxeboot/ . Ian. -- Ian Campbell Current Noise: Sabbat - Behind The Crooked Cross (Live) Lighten up, while you still can, Don't even try to understand, Just find a place to make your stand, And take it easy. -- The Eagles, Take It Easy
Re: [Qemu-devel] [PATCH, RFT] monitor: implement x86 info tlb for PAE and long modes
On 06.12.2010, at 19:38, Blue Swirl wrote: On Mon, Dec 6, 2010 at 11:12 AM, Alexander Graf ag...@suse.de wrote: On 05.12.2010, at 17:25, Blue Swirl wrote: 'info tlb' didn't show correct information for PAE mode and x86_64 long mode. Implement the missing modes. Also print NX bit for PAE and long modes. Fix off-by-one error in 32 bit mode mask. Signed-off-by: Blue Swirl blauwir...@gmail.com --- I didn't find an OS that enabled PAE, please test and report. Xen does. Just take a random recent xen kernel and run it with -kernel :). Thanks, it does (CR4 is 0xb0). I'm not sure all is correct, after 0x100 the dump looks messy: 00c0: 00c0 --PDA---W 00e0: 00e0 --PDA---W 0100: f000ff53f000f000 XG-D-C--W 01001000: f000ff53f000e000 X--DW 01002000: f000ff53f000f000 XG-D-C--W 01003000: f000ff53f000f000 XG-D-C--W 01004000: f000e987f000f000 X---A--U- Good question XD. I guess the best way to find out if those numbers are right would be to trace the page tables manually. info tlb shows PA : VA, right? Alex
Re: [Qemu-devel] [PATCH, RFT] monitor: implement x86 info tlb for PAE and long modes
On 05.12.2010, at 17:25, Blue Swirl wrote: 'info tlb' didn't show correct information for PAE mode and x86_64 long mode. Implement the missing modes. Also print NX bit for PAE and long modes. Fix off-by-one error in 32 bit mode mask. Signed-off-by: Blue Swirl blauwir...@gmail.com --- I didn't find an OS that enabled PAE, please test and report. Xen does. Just take a random recent xen kernel and run it with -kernel :). Alex
Re: [Qemu-devel] [PATCH, RFT] monitor: implement x86 info tlb for PAE and long modes
On Mon, 2010-12-06 at 12:12 +0100, Alexander Graf wrote: On 05.12.2010, at 17:25, Blue Swirl wrote: 'info tlb' didn't show correct information for PAE mode and x86_64 long mode. Implement the missing modes. Also print NX bit for PAE and long modes. Fix off-by-one error in 32 bit mode mask. Signed-off-by: Blue Swirl blauwir...@gmail.com --- I didn't find an OS that enabled PAE, please test and report. Xen does. Just take a random recent xen kernel and run it with -kernel :). In addition AFAIK recent 32 bit Fedora is PAE enabled by default (so is RHEL6?). Debian also supplies a -686-bigmem kernel flavour which is their name for PAE enabled. Ian. -- Ian Campbell Current Noise: The Dillinger Escape Plan - Hollywood Squares Turnaucka's Law: The attention span of a computer is only as long as its electrical cord.
Re: [Qemu-devel] [PATCH, RFT] monitor: implement x86 info tlb for PAE and long modes
On Mon, Dec 6, 2010 at 11:12 AM, Alexander Graf ag...@suse.de wrote: On 05.12.2010, at 17:25, Blue Swirl wrote: 'info tlb' didn't show correct information for PAE mode and x86_64 long mode. Implement the missing modes. Also print NX bit for PAE and long modes. Fix off-by-one error in 32 bit mode mask. Signed-off-by: Blue Swirl blauwir...@gmail.com --- I didn't find an OS that enabled PAE, please test and report. Xen does. Just take a random recent xen kernel and run it with -kernel :). Thanks, it does (CR4 is 0xb0). I'm not sure all is correct, after 0x100 the dump looks messy: 00c0: 00c0 --PDA---W 00e0: 00e0 --PDA---W 0100: f000ff53f000f000 XG-D-C--W 01001000: f000ff53f000e000 X--DW 01002000: f000ff53f000f000 XG-D-C--W 01003000: f000ff53f000f000 XG-D-C--W 01004000: f000e987f000f000 X---A--U-
Re: [Qemu-devel] [PATCH, RFT] monitor: implement x86 info tlb for PAE and long modes
On Mon, Dec 6, 2010 at 1:05 PM, Ian Campbell i...@hellion.org.uk wrote: On Mon, 2010-12-06 at 12:12 +0100, Alexander Graf wrote: On 05.12.2010, at 17:25, Blue Swirl wrote: 'info tlb' didn't show correct information for PAE mode and x86_64 long mode. Implement the missing modes. Also print NX bit for PAE and long modes. Fix off-by-one error in 32 bit mode mask. Signed-off-by: Blue Swirl blauwir...@gmail.com --- I didn't find an OS that enabled PAE, please test and report. Xen does. Just take a random recent xen kernel and run it with -kernel :). In addition AFAIK recent 32 bit Fedora is PAE enabled by default (so is RHEL6?). Debian also supplies a -686-bigmem kernel flavour which is their name for PAE enabled. At least Fedora 14 installation CD kernel does not enable PAE with 5G of memory (enabled for i386 by adjusting target_phys_bits in configure).
