On Mon, Aug 05, 2013 at 03:39:31PM +0200, Laszlo Ersek wrote: > My question was: is my understanding correct that you only see this > problem with "-enable-kvm"? Because, > > On 08/01/13 18:49, Borislav Petkov wrote: > > so I'm seeing this funny thing where an EFI region changes when we > > enter efi_enter_virtual_mode when booting with edk2 on kvm. Here's > > the diff: > > You said "on kvm", and provided a diff. I think (hope) I understand the > environment you've denoted with "after", but what's your "before"? The > absence of "-enable-kvm", or something else? Ah, I see. So 'before' is the initial dump of the EFI regions, very early during boot: [ 0.000000] efi: EFI v2.31 by EDK II [ 0.000000] efi: ACPI=0x7fb71000 ACPI 2.0=0x7fb71014 [ 0.000000] efi: mem00: type=7, attr=0xf, range=[0x0000000000000000-0x000000000009f000) (0MB) [ 0.000000] efi: mem01: type=2, attr=0xf, range=[0x000000000009f000-0x00000000000a0000) (0MB) [ 0.000000] efi: mem02: type=7, attr=0xf, range=[0x0000000000100000-0x0000000000800000) (7MB) [ 0.000000] efi: mem03: type=4, attr=0xf, range=[0x0000000000800000-0x0000000001000000) (8MB) [ 0.000000] efi: mem04: type=7, attr=0xf, range=[0x0000000001000000-0x0000000002000000) (16MB) [ 0.000000] efi: mem05: type=2, attr=0xf, range=[0x0000000002000000-0x00000000036e3000) (22MB) [ 0.000000] efi: mem06: type=7, attr=0xf, range=[0x00000000036e3000-0x000000003fffb000) (969MB) [ 0.000000] efi: mem07: type=2, attr=0xf, range=[0x000000003fffb000-0x0000000040000000) (0MB) [ 0.000000] efi: mem08: type=7, attr=0xf, range=[0x0000000040000000-0x000000007c000000) (960MB) [ 0.000000] efi: mem09: type=4, attr=0xf, range=[0x000000007c000000-0x000000007c020000) (0MB) [ 0.000000] efi: mem10: type=7, attr=0xf, range=[0x000000007c020000-0x000000007e0ad000) (32MB) [ 0.000000] efi: mem11: type=4, attr=0xf, range=[0x000000007e0ad000-0x000000007e0cc000) (0MB) [ 0.000000] efi: mem12: type=7, attr=0xf, range=[0x000000007e0cc000-0x000000007e0cd000) (0MB) [ 0.000000] efi: mem13: type=4, attr=0xf, range=[0x000000007e0cd000-0x000000007e55d000) (4MB) [ 0.000000] efi: mem14: type=3, attr=0xf, range=[0x000000007e55d000-0x000000007e59c000) (0MB) [ 0.000000] efi: mem15: type=4, attr=0xf, range=[0x000000007e59c000-0x000000007e5a0000) (0MB) [ 0.000000] efi: mem16: type=3, attr=0xf, range=[0x000000007e5a0000-0x000000007e668000) (0MB) [ 0.000000] efi: mem17: type=5, attr=0x800000000000000f, range=[0x000000007e668000-0x000000007e67d000) (0MB) [ 0.000000] efi: mem18: type=6, attr=0x800000000000000f, range=[0x000000007e67d000-0x000000007e692000) (0MB) [ 0.000000] efi: mem19: type=4, attr=0xf, range=[0x000000007e692000-0x000000007f992000) (19MB) [ 0.000000] efi: mem20: type=7, attr=0xf, range=[0x000000007f992000-0x000000007f994000) (0MB) [ 0.000000] efi: mem21: type=3, attr=0xf, range=[0x000000007f994000-0x000000007fb12000) (1MB) [ 0.000000] efi: mem22: type=5, attr=0x800000000000000f, range=[0x000000007fb12000-0x000000007fb42000) (0MB) [ 0.000000] efi: mem23: type=6, attr=0x800000000000000f, range=[0x000000007fb42000-0x000000007fb66000) (0MB) [ 0.000000] efi: mem24: type=0, attr=0xf, range=[0x000000007fb66000-0x000000007fb6a000) (0MB) [ 0.000000] efi: mem25: type=9, attr=0xf, range=[0x000000007fb6a000-0x000000007fb72000) (0MB) [ 0.000000] efi: mem26: type=10, attr=0xf, range=[0x000000007fb72000-0x000000007fb76000) (0MB) [ 0.000000] efi: mem27: type=4, attr=0xf, range=[0x000000007fb76000-0x000000007ffe0000) (4MB) [ 0.000000] efi: mem28: type=6, attr=0x800000000000000f, range=[0x000000007ffe0000-0x0000000080000000) (0MB) and with 'after' I've denoted the dump of the EFI regions a second time, a bit later, when we enter efi_enter_virtual_mode(): [ 0.005012] efi: efi_enter_virtual_mode: enter [ 0.006004] efi: mem00: type=7, attr=0xf, range=[0x0000000000000000-0x000000000009f000) (0MB) [ 0.007004] efi: mem01: type=2, attr=0xf, range=[0x000000000009f000-0x00000000000a0000) (0MB) [ 0.008003] efi: mem02: type=7, attr=0xf, range=[0x0000000000100000-0x0000000000800000) (7MB) [ 0.009004] efi: mem03: type=4, attr=0xf, range=[0x0000000000800000-0x0000000001000000) (8MB) [ 0.010004] efi: mem04: type=7, attr=0xf, range=[0x0000000001000000-0x0000000002000000) (16MB) [ 0.011004] efi: mem05: type=2, attr=0xf, range=[0x0000000002000000-0x00000000036e3000) (22MB) [ 0.012004] efi: mem06: type=7, attr=0xf, range=[0x00000000036e3000-0x000000003fffb000) (969MB) [ 0.013003] efi: mem07: type=2, attr=0xf, range=[0x000000003fffb000-0x0000000040000000) (0MB) [ 0.014004] efi: mem08: type=7, attr=0xf, range=[0x0000000040000000-0x000000007c000000) (960MB) [ 0.015004] efi: mem09: type=4, attr=0xf, range=[0x000000007c000000-0x000000007c020000) (0MB) [ 0.016004] efi: mem10: type=7, attr=0xf, range=[0x000000007c020000-0x000000007e0ad000) (32MB) [ 0.017004] efi: mem11: type=4, attr=0xf, range=[0x000000007e0ad000-0x000000007e0ad000) (0MB) [ 0.018003] efi: mem12: type=7, attr=0xf, range=[0x000000007e0cc000-0x000000007e0cd000) (0MB) [ 0.019003] efi: mem13: type=4, attr=0xf, range=[0x000000007e0cd000-0x000000007e55d000) (4MB) [ 0.021010] efi: mem14: type=3, attr=0xf, range=[0x000000007e55d000-0x000000007e59c000) (0MB) [ 0.022004] efi: mem15: type=4, attr=0xf, range=[0x000000007e59c000-0x000000007e5a0000) (0MB) [ 0.023003] efi: mem16: type=3, attr=0xf, range=[0x000000007e5a0000-0x000000007e668000) (0MB) [ 0.024004] efi: mem17: type=5, attr=0x800000000000000f, range=[0x000000007e668000-0x000000007e67d000) (0MB) [ 0.025003] efi: mem18: type=6, attr=0x800000000000000f, range=[0x000000007e67d000-0x000000007e692000) (0MB) [ 0.026004] efi: mem19: type=4, attr=0xf, range=[0x000000007e692000-0x000000007f992000) (19MB) [ 0.027003] efi: mem20: type=7, attr=0xf, range=[0x000000007f992000-0x000000007f994000) (0MB) [ 0.028003] efi: mem21: type=3, attr=0xf, range=[0x000000007f994000-0x000000007fb12000) (1MB) [ 0.029004] efi: mem22: type=5, attr=0x800000000000000f, range=[0x000000007fb12000-0x000000007fb42000) (0MB) [ 0.030004] efi: mem23: type=6, attr=0x800000000000000f, range=[0x000000007fb42000-0x000000007fb66000) (0MB) [ 0.031004] efi: mem24: type=0, attr=0xf, range=[0x000000007fb66000-0x000000007fb6a000) (0MB) [ 0.032004] efi: mem25: type=9, attr=0xf, range=[0x000000007fb6a000-0x000000007fb72000) (0MB) [ 0.033004] efi: mem26: type=10, attr=0xf, range=[0x000000007fb72000-0x000000007fb76000) (0MB) [ 0.034003] efi: mem27: type=4, attr=0xf, range=[0x000000007fb76000-0x000000007ffe0000) (4MB) [ 0.035003] efi: mem28: type=6, attr=0x800000000000000f, range=[0x000000007ffe0000-0x0000000080000000) (0MB) during the *same* boot. So, it is one boot but two dumps of the EFI regions. And yes, I'm booting with the 'kvm' executable which has '-enable-kvm' > What's the purpose of that series? Can you please provide a link (if > you posted versions of it already)? Not yet posted but working on it. The idea is to map the runtime regions at stable addresses so that when we kexec a kernel, it can use runtime services too. And we have to do that because of the braindead design of SetVirtualAddressMap() being callable only once per boot. > > So what basically happens is the end boundary of the region becomes the > > start, practically turning it into a 0-size one. > > ... and you guys suspect that some firmware code is responsible, code > that runs between the initial memory map dump, and efi_enter_virtual_mode(): > > https://lkml.org/lkml/2013/7/31/550 I wouldn't wonder if we f*cked it up again like the last time. I'll give it a long hard look. > > Thanks for looking into it. > > Hopefully DEBUG_GCD will tell us something. Thanks. -- Regards/Gruss, Boris. Sent from a fat crate under my desk. Formatting is fine. -- -- To unsubscribe from this list: send the line "unsubscribe linux-efi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
