kernel/linux.git/arch/x86/include/asm/hypervisor.h, branch v6.6.134

x86/paravirt: Remove const mark from x86_hyper_xen_hvm variable

2019-07-17T06:09:59+00:00

.. as "nopv" support needs it to be changeable at boot up stage. Checkpatch reports warning, so move variable declarations from hypervisor.c to hypervisor.h Signed-off-by: Zhenzhong Duan Reviewed-by: Juergen Gross Cc: Boris Ostrovsky Cc: Juergen Gross Cc: Stefano Stabellini Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Signed-off-by: Juergen Gross

x86: Add "nopv" parameter to disable PV extensions

2019-07-17T06:09:58+00:00

In virtualization environment, PV extensions (drivers, interrupts, timers, etc) are enabled in the majority of use cases which is the best option. However, in some cases (kexec not fully working, benchmarking) we want to disable PV extensions. We have "xen_nopv" for that purpose but only for XEN. For a consistent admin experience a common command line parameter "nopv" set across all PV guest implementations is a better choice. There are guest types which just won't work without PV extensions, like Xen PV, Xen PVH and jailhouse. add a "ignore_nopv" member to struct hypervisor_x86 set to true for those guest types and call the detect functions only if nopv is false or ignore_nopv is true. Suggested-by: Juergen Gross Signed-off-by: Zhenzhong Duan Reviewed-by: Juergen Gross Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: Jan Kiszka Cc: Boris Ostrovsky Cc: Stefano Stabellini Signed-off-by: Juergen Gross

x86: Add support for Linux guests on an ACRN hypervisor

2019-06-11T19:29:22+00:00

ACRN is an open-source hypervisor maintained by The Linux Foundation. It is built for embedded IOT with small footprint and real-time features. Add ACRN guest support so that it allows Linux to be booted under the ACRN hypervisor. This adds only the barebones implementation. [ bp: Massage commit message and help text. ] Co-developed-by: Jason Chen CJ Signed-off-by: Jason Chen CJ Signed-off-by: Zhao Yakui Signed-off-by: Borislav Petkov Reviewed-by: Thomas Gleixner Cc: "H. Peter Anvin" Cc: Ingo Molnar Cc: Thomas Gleixner Cc: x86-ml Link: https://lkml.kernel.org/r/1559108037-18813-3-git-send-email-yakui.zhao@intel.com

x86/jailhouse: Add infrastructure for running in non-root cell

2018-01-14T20:11:54+00:00

The Jailhouse hypervisor is able to statically partition a multicore system into multiple so-called cells. Linux is used as boot loader and continues to run in the root cell after Jailhouse is enabled. Linux can also run in non-root cells. Jailhouse does not emulate usual x86 devices. It also provides no complex ACPI but basic platform information that the boot loader forwards via setup data. This adds the infrastructure to detect when running in a non-root cell so that the platform can be configured as required in succeeding steps. Support is limited to x86-64 so far, primarily because no boot loader stub exists for i386 and, thus, we wouldn't be able to test the 32-bit path. Signed-off-by: Jan Kiszka Signed-off-by: Thomas Gleixner Cc: jailhouse-dev@googlegroups.com Link: https://lkml.kernel.org/r/7f823d077b38b1a70c526b40b403f85688c137d3.1511770314.git.jan.kiszka@siemens.com

x86/paravirt: Provide a way to check for hypervisors

2017-12-17T13:27:52+00:00

There is no generic way to test whether a kernel is running on a specific hypervisor. But that's required to prevent the upcoming user address space separation feature in certain guest modes. Make the hypervisor type enum unconditionally available and provide a helper function which allows to test for a specific type. Signed-off-by: Thomas Gleixner Reviewed-by: Juergen Gross Cc: Andy Lutomirski Cc: Boris Ostrovsky Cc: Borislav Petkov Cc: Borislav Petkov Cc: Brian Gerst Cc: Dave Hansen Cc: Dave Hansen Cc: David Laight Cc: Denys Vlasenko Cc: Eduardo Valentin Cc: Greg KH Cc: H. Peter Anvin Cc: Josh Poimboeuf Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Rik van Riel Cc: Will Deacon Cc: aliguori@amazon.com Cc: daniel.gruss@iaik.tugraz.at Cc: hughd@google.com Cc: keescook@google.com Link: https://lkml.kernel.org/r/20171204150606.912938129@linutronix.de Signed-off-by: Ingo Molnar

x86/virt: Add enum for hypervisors to replace x86_hyper

2017-11-10T09:03:12+00:00

The x86_hyper pointer is only used for checking whether a virtual device is supporting the hypervisor the system is running on. Use an enum for that purpose instead and drop the x86_hyper pointer. Signed-off-by: Juergen Gross Acked-by: Thomas Gleixner Acked-by: Xavier Deguillard Cc: Linus Torvalds Cc: Peter Zijlstra Cc: akataria@vmware.com Cc: arnd@arndb.de Cc: boris.ostrovsky@oracle.com Cc: devel@linuxdriverproject.org Cc: dmitry.torokhov@gmail.com Cc: gregkh@linuxfoundation.org Cc: haiyangz@microsoft.com Cc: kvm@vger.kernel.org Cc: kys@microsoft.com Cc: linux-graphics-maintainer@vmware.com Cc: linux-input@vger.kernel.org Cc: moltmann@vmware.com Cc: pbonzini@redhat.com Cc: pv-drivers@vmware.com Cc: rkrcmar@redhat.com Cc: sthemmin@microsoft.com Cc: virtualization@lists.linux-foundation.org Cc: xen-devel@lists.xenproject.org Link: http://lkml.kernel.org/r/20171109132739.23465-3-jgross@suse.com Signed-off-by: Ingo Molnar

x86/virt, x86/platform: Merge 'struct x86_hyper' into 'struct x86_platform' and 'struct x86_init'

2017-11-10T09:03:12+00:00

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 remove the need for wrappers making it hard to find out what is being called. With dummy functions added for all callbacks testing for a NULL function pointer can be removed, too. Suggested-by: Ingo Molnar Signed-off-by: Juergen Gross Acked-by: Thomas Gleixner Cc: Linus Torvalds Cc: Peter Zijlstra Cc: akataria@vmware.com Cc: boris.ostrovsky@oracle.com Cc: devel@linuxdriverproject.org Cc: haiyangz@microsoft.com Cc: kvm@vger.kernel.org Cc: kys@microsoft.com Cc: pbonzini@redhat.com Cc: rkrcmar@redhat.com Cc: rusty@rustcorp.com.au Cc: sthemmin@microsoft.com Cc: virtualization@lists.linux-foundation.org Cc: xen-devel@lists.xenproject.org Link: http://lkml.kernel.org/r/20171109132739.23465-2-jgross@suse.com Signed-off-by: Ingo Molnar

x86: provide an init_mem_mapping hypervisor hook

2017-08-11T13:50:21+00:00

Provide a hook in hypervisor_x86 called after setting up initial memory mapping. This is needed e.g. by Xen HVM guests to map the hypervisor shared info page. Signed-off-by: Juergen Gross Reviewed-by: Boris Ostrovsky Acked-by: Ingo Molnar Signed-off-by: Juergen Gross

x86/cpu: remove hypervisor specific set_cpu_features

2017-05-02T09:14:30+00:00

There is no user of x86_hyper->set_cpu_features() any more. Remove it. Cc: Thomas Gleixner Cc: Ingo Molnar Cc: "H. Peter Anvin" Cc: x86@kernel.org Signed-off-by: Juergen Gross Reviewed-by: Boris Ostrovsky Signed-off-by: Juergen Gross

x86/xen: separate PV and HVM hypervisors

2017-05-02T08:49:44+00:00

As a preparation to splitting the code we need to untangle it: x86_hyper_xen -> x86_hyper_xen_hvm and x86_hyper_xen_pv xen_platform() -> xen_platform_hvm() and xen_platform_pv() xen_cpu_up_prepare() -> xen_cpu_up_prepare_pv() and xen_cpu_up_prepare_hvm() xen_cpu_dead() -> xen_cpu_dead_pv() and xen_cpu_dead_pv_hvm() Add two parameters to xen_cpuhp_setup() to pass proper cpu_up_prepare and cpu_dead hooks. xen_set_cpu_features() is now PV-only so the redundant xen_pv_domain() check can be dropped. Signed-off-by: Vitaly Kuznetsov Reviewed-by: Juergen Gross Signed-off-by: Juergen Gross