Re: [Xen-devel] [PATCH v3 0/2] Optionally call EFI SetVirtualAddressMap()
On Sat, Oct 12, 2019 at 6:11 PM Marek Marczykowski-Górecki wrote: > > Workaround buggy UEFI accessing boot services memory after ExitBootServices(). > Patches discussed here: > https://lists.xenproject.org/archives/html/xen-devel/2019-08/msg00701.html > > In addition to the tests below, I've tested kexec on xen.efi with this option > enabled and it (still) works. > > Test results on few laptops: > > Thinkpad x230, firmware version 2.77: > - without the patch: crashes on RS call (mapbs helps) > - with patch: works > - same with xen.efi and MB2 > > Librem 14 v1, firmware version (AMI) ARUD026 (06/18/2015): > - without the patch: works > - with the patch: works > - same with xen.efi and MB2 > > Dell Latitude E6420, firmware version A21: > this machine requires efi=attr=uc workaround > - without the patch: dom0 hangs before sending any message to the console > (even with earlyprintk=xen etc) > - with the patch: crashes before dom0 prints anything: mm.c:896:d0v0 > non-privileged attempt to map MMIO space 2c2c2c2c2c > - same with xen.efi and MB2 > > Thinkpad W540: > - without the patch: crashes on RS call (only efi=no-rs helps) > - with patch: works > - tested only with MB2 > > Thinkpad X1 Carbon gen5, firmware version 1.22 (2017-07-04): > - without the patch: works > - with patch: works > - tested only xen.efi > > Thinkpad P52, firmware version 1.25 (2018-04-15): > - without the patch (MB2): hangs on RS call (mapbs helps) > - without the patch (xen.efi): works(?!) > - with the patch: works > - tested with xen.efi and MB2 > > Changes in v2: > - fix boot with xen.efi (efi_memmap at this point still needs to be accessed >via physical address). TBH, I don't understand why previous version worked >with MB2 - is directmap mapped at this point? v1 failed to boot for me. For v3: Dell Latitude 5580, firmware 1.16.0 - without the patch: works - with patch: works - tested only xen.efi Tested-by: Jason Andryuk ___ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
[Xen-devel] [PATCH v3 0/2] Optionally call EFI SetVirtualAddressMap()
Workaround buggy UEFI accessing boot services memory after ExitBootServices(). Patches discussed here: https://lists.xenproject.org/archives/html/xen-devel/2019-08/msg00701.html In addition to the tests below, I've tested kexec on xen.efi with this option enabled and it (still) works. Test results on few laptops: Thinkpad x230, firmware version 2.77: - without the patch: crashes on RS call (mapbs helps) - with patch: works - same with xen.efi and MB2 Librem 14 v1, firmware version (AMI) ARUD026 (06/18/2015): - without the patch: works - with the patch: works - same with xen.efi and MB2 Dell Latitude E6420, firmware version A21: this machine requires efi=attr=uc workaround - without the patch: dom0 hangs before sending any message to the console (even with earlyprintk=xen etc) - with the patch: crashes before dom0 prints anything: mm.c:896:d0v0 non-privileged attempt to map MMIO space 2c2c2c2c2c - same with xen.efi and MB2 Thinkpad W540: - without the patch: crashes on RS call (only efi=no-rs helps) - with patch: works - tested only with MB2 Thinkpad X1 Carbon gen5, firmware version 1.22 (2017-07-04): - without the patch: works - with patch: works - tested only xen.efi Thinkpad P52, firmware version 1.25 (2018-04-15): - without the patch (MB2): hangs on RS call (mapbs helps) - without the patch (xen.efi): works(?!) - with the patch: works - tested with xen.efi and MB2 Changes in v2: - fix boot with xen.efi (efi_memmap at this point still needs to be accessed via physical address). TBH, I don't understand why previous version worked with MB2 - is directmap mapped at this point? Cc: Juergen Gross Cc: Andrew Cooper Cc: George Dunlap Cc: Ian Jackson Cc: Jan Beulich Cc: Julien Grall Cc: Konrad Rzeszutek Wilk Cc: Stefano Stabellini Cc: Tim Deegan Cc: Wei Liu Cc: Jason Andryuk Marek Marczykowski-Górecki (2): efi: remove old SetVirtualAddressMap() arrangement xen/efi: optionally call SetVirtualAddressMap() xen/common/Kconfig| 13 - xen/common/efi/boot.c | 48 +++- 2 files changed, 39 insertions(+), 22 deletions(-) base-commit: 7a4e674905b3cbbe48e81c3222361a7f3579 -- git-series 0.9.1 ___ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
