similar to: [PATCH] apic/iommu: Correct grammar in error message and clarify its meaning

The iommu is enabled by default when xen is booting and later disabled in iommu_setup() when no iommu is present. But under some circumstances iommu code can be called before iommu_setup() is processed. If there is no iommu available xen crashes. This can happen for example when panic(...) is called as introduced with the patch "x86-64: detect processors subject to AMD erratum #121 and

http://www.intel.com/content/www/us/en/chipsets/5520-and-5500-chipset-ioh-specification-update.html Stepping B-3 has two errata (#47 and #53) related to Interrupt remapping, to which the workaround is for the BIOS to completely disable interrupt remapping. These errata are fixed in stepping C-2. Unfortunately this chipset is very common and many BIOSes are not disabling remapping. We can

x86:x2apic: Disable x2apic on x86-32 permanently x2apic initialization on x86_32 uses vcpu pointer before it is initialized. As x2apic is unlikely to be used on x86_32, this patch disables x2apic permanently on x86_32. It also asserts the sanity of vcpu pointer before dereference to prevent further misuse. Signed-off-by: Fengzhe Zhang <fengzhe.zhang@intel.com> diff -r 02c0af2bf280

Other than for the legacy APIC, the x2APIC MADT entries have valid ranges possibly extending beyond what our internal arrays can handle, and hence we need to guard ourselves against corrupting memory here. Signed-off-by: Jan Beulich <jbeulich@suse.com> --- a/xen/arch/x86/acpi/boot.c +++ b/xen/arch/x86/acpi/boot.c @@ -97,7 +97,20 @@ acpi_parse_x2apic(struct acpi_subtable_h

The DMI checks that force the use of the bigsmp APIC driver are for systems that are no longer supported by Xen (32-bit x86). Signed-off-by: Matt Wilson <msw@amazon.com> Cc: Keir Fraser <keir@xen.org> Cc: Jan Beulich <jbeulich@suse.com> Cc: Andrew Cooper <andrew.cooper3@citrix.com> --- xen/arch/x86/genapic/bigsmp.c | 30 +----------------------------- 1 files changed, 1

This patch masks PIC and IOAPIC RTE''s before x2APIC enabling, unmask and restore them after x2APIC enabling. It also really enables interrupt remapping before x2APIC enabling instead of just checking interrupt remapping setting. This patch also handles all x2APIC configuration including BIOS settings and command line settings. Especially, it handles that BIOS hands over in x2APIC mode

Hi, I have a guest enabled vIOMMU, but on the guest there are several devices in the same iommu group. Could someone help to check if I missed something? Thank you very much! 1. guest xml: # virsh edit q ... <os> <type arch='x86_64' machine='pc-q35-rhel7.5.0'>hvm</type> <loader readonly='yes' secure='yes'

Please consider this patch to allow x2apic without IR support when running on VMware platform. Tested on top of 3.8-rc3. Thanks, Alok -- Allow x2apic without IR on VMware platform. From: Alok N Kataria <akataria at vmware.com> This patch updates x2apic initializaition code to allow x2apic on VMware platform even without interrupt remapping support. The hypervisor_x2apic_available hook

Please consider this patch to allow x2apic without IR support when running on VMware platform. Tested on top of 3.8-rc3. Thanks, Alok -- Allow x2apic without IR on VMware platform. From: Alok N Kataria <akataria at vmware.com> This patch updates x2apic initializaition code to allow x2apic on VMware platform even without interrupt remapping support. The hypervisor_x2apic_available hook

Environment: ASRock Z86 Extreme4 - Intel i5 2500 http://www.asrock.com/mb/overview.asp?Model=Z68%20Extreme4 I have installed the latest UEFI patch(1.70) and all tests were run from a reset of everything to default. I have tested with both Ubuntu 11.10 and Fedora 16 and get the same results on both, including building xen 4.2-unstable. I bought this particular MB because it had a know working vt-d

Not sure I did the xen log correctly. I have this in /etc/default/grub now: GRUB_CMDLINE_XEN_DEFAULT="loglvl=all" And now here is xen dmesg: root at xen-3:~# xl dmesg (XEN) Xen version 4.3.0 (Debian 4.3.0-3+b1) (buildd-binet at buildd.debian.org) (gcc (Debian 4.8.2-8) 4.8.2) debug=n Wed Dec 4 07:43:54 UTC 2013 (XEN) Bootloader: GRUB 2.00-22 (XEN) Command line: placeholder

(copying xen-devel, full logs are at bugs.debian.org/748052, this is Debian Jessie, Xen 4.3.0 and Linux 3.13 Mike also reported that Debian Wheezy Xen 4.1.4 didn't work either, not clear which kernel that was with though, Wheezy's 3.2 or Jessie's 3.13) On Thu, 2014-05-15 at 10:11 -0700, Mike Egglestone wrote: > Here are some results with (now) the latest BIOS version 41. (was >

From: Jean-Philippe Brucker <jean-philippe.brucker at arm.com> Now that the infrastructure changes are in place, enable virtio-iommu to be built as a module. Remove the redundant pci_request_acs() call, since it's not exported but is already invoked during DMA setup. Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker at arm.com> --- This conflicts with the multiplatform

From: Jean-Philippe Brucker <jean-philippe.brucker at arm.com> Now that the infrastructure changes are in place, enable virtio-iommu to be built as a module. Remove the redundant pci_request_acs() call, since it's not exported but is already invoked during DMA setup. Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker at arm.com> --- This conflicts with the multiplatform

Ian Campbell <ijc at hellion.org.uk> writes: #Please boot with loglvl=all on the hypervisor command line for this too. No problem Ian, Here are some results with (now) the latest BIOS version 41. (was version 35) This is a fresh new install of Debian "Testing" non production server. Just wanted to run some test domU's. Changing USB ports, no effect. I even tried a different

This issue I am encountering seems to only happen on multi-socket machines. It also does not help that the only multi-socket box I have is an Romley-EP (so two socket SandyBridge CPUs). The other SandyBridge boxes I''ve (one socket) are not showing this. Granted they are also a different model (42). The problem is that when I run ''perf top'' within an SMP PVHVM guest,

1: IOMMU: properly check whether interrupt remapping is enabled 2: AMD IOMMU: only disable when certain IVRS consistency checks fail 3: VT-d: deal with 5500/5520/X58 errata Patch 1 and 2 are version 2 of a previously submitted, then withdrawn patch following up after XSA-36. Patch 3 is version 3 of a patch previously sent by Malcolm and Andrew. Signed-off-by: Jan Beulich

flight 19797 xen-unstable real [real] http://www.chiark.greenend.org.uk/~xensrcts/logs/19797/ Regressions :-( Tests which did not succeed and are blocking, including tests which could not be run: test-amd64-i386-xl-winxpsp3-vcpus1 10 guest-saverestore.2 fail REGR. vs. 19794 Tests which did not succeed, but are not blocking: test-armhf-armhf-xl 3 host-install(3) broken

On platforms which supports x2APIC, the patches enable this enhancement for Xen. The x2APIC specification is available at http://www.intel.com/products/processor/manuals/ http://download.intel.com/design/processor/specupdt/318148.pdf apicid_u8_2_u32.patch: changes the ''apicid'' from u8 to u32; x2apic.patch: replaces the traditional MMIO-style interface to the MSR-style one; uses

4.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Juergen Gross <jgross at suse.com> commit f72e38e8ec8869ac0ba5a75d7d2f897d98a1454e upstream. Instead of x86_hyper being either NULL on bare metal or a pointer to a struct hypervisor_x86 in case of the kernel running as a guest merge the struct into x86_platform and x86_init. This will