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Author SHA1 Message Date
Kashyap Chamarthy 27abe57770 docs/virt/kvm: Document configuring and running nested guests
This is a rewrite of this[1] Wiki page with further enhancements.  The
doc also includes a section on debugging problems in nested
environments, among other improvements.

[1] https://www.linux-kvm.org/page/Nested_Guests

Signed-off-by: Kashyap Chamarthy <kchamart@redhat.com>
Message-Id: <20200505112839.30534-1-kchamart@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-05-06 05:45:47 -04:00
Linus Torvalds 8c1b724ddb ARM:
* GICv4.1 support
 * 32bit host removal
 
 PPC:
 * secure (encrypted) using under the Protected Execution Framework
 ultravisor
 
 s390:
 * allow disabling GISA (hardware interrupt injection) and protected
 VMs/ultravisor support.
 
 x86:
 * New dirty bitmap flag that sets all bits in the bitmap when dirty
 page logging is enabled; this is faster because it doesn't require bulk
 modification of the page tables.
 * Initial work on making nested SVM event injection more similar to VMX,
 and less buggy.
 * Various cleanups to MMU code (though the big ones and related
 optimizations were delayed to 5.8).  Instead of using cr3 in function
 names which occasionally means eptp, KVM too has standardized on "pgd".
 * A large refactoring of CPUID features, which now use an array that
 parallels the core x86_features.
 * Some removal of pointer chasing from kvm_x86_ops, which will also be
 switched to static calls as soon as they are available.
 * New Tigerlake CPUID features.
 * More bugfixes, optimizations and cleanups.
 
 Generic:
 * selftests: cleanups, new MMU notifier stress test, steal-time test
 * CSV output for kvm_stat.
 
 KVM/MIPS has been broken since 5.5, it does not compile due to a patch committed
 by MIPS maintainers.  I had already prepared a fix, but the MIPS maintainers
 prefer to fix it in generic code rather than KVM so they are taking care of it.
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull kvm updates from Paolo Bonzini:
 "ARM:
   - GICv4.1 support

   - 32bit host removal

  PPC:
   - secure (encrypted) using under the Protected Execution Framework
     ultravisor

  s390:
   - allow disabling GISA (hardware interrupt injection) and protected
     VMs/ultravisor support.

  x86:
   - New dirty bitmap flag that sets all bits in the bitmap when dirty
     page logging is enabled; this is faster because it doesn't require
     bulk modification of the page tables.

   - Initial work on making nested SVM event injection more similar to
     VMX, and less buggy.

   - Various cleanups to MMU code (though the big ones and related
     optimizations were delayed to 5.8). Instead of using cr3 in
     function names which occasionally means eptp, KVM too has
     standardized on "pgd".

   - A large refactoring of CPUID features, which now use an array that
     parallels the core x86_features.

   - Some removal of pointer chasing from kvm_x86_ops, which will also
     be switched to static calls as soon as they are available.

   - New Tigerlake CPUID features.

   - More bugfixes, optimizations and cleanups.

  Generic:
   - selftests: cleanups, new MMU notifier stress test, steal-time test

   - CSV output for kvm_stat"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (277 commits)
  x86/kvm: fix a missing-prototypes "vmread_error"
  KVM: x86: Fix BUILD_BUG() in __cpuid_entry_get_reg() w/ CONFIG_UBSAN=y
  KVM: VMX: Add a trampoline to fix VMREAD error handling
  KVM: SVM: Annotate svm_x86_ops as __initdata
  KVM: VMX: Annotate vmx_x86_ops as __initdata
  KVM: x86: Drop __exit from kvm_x86_ops' hardware_unsetup()
  KVM: x86: Copy kvm_x86_ops by value to eliminate layer of indirection
  KVM: x86: Set kvm_x86_ops only after ->hardware_setup() completes
  KVM: VMX: Configure runtime hooks using vmx_x86_ops
  KVM: VMX: Move hardware_setup() definition below vmx_x86_ops
  KVM: x86: Move init-only kvm_x86_ops to separate struct
  KVM: Pass kvm_init()'s opaque param to additional arch funcs
  s390/gmap: return proper error code on ksm unsharing
  KVM: selftests: Fix cosmetic copy-paste error in vm_mem_region_move()
  KVM: Fix out of range accesses to memslots
  KVM: X86: Micro-optimize IPI fastpath delay
  KVM: X86: Delay read msr data iff writes ICR MSR
  KVM: PPC: Book3S HV: Add a capability for enabling secure guests
  KVM: arm64: GICv4.1: Expose HW-based SGIs in debugfs
  KVM: arm64: GICv4.1: Allow non-trapping WFI when using HW SGIs
  ...
2020-04-02 15:13:15 -07:00
Paolo Bonzini 4f4af841f0 KVM PPC update for 5.7
* Add a capability for enabling secure guests under the Protected
   Execution Framework ultravisor
 
 * Various bug fixes and cleanups.
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Merge tag 'kvm-ppc-next-5.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc into HEAD

KVM PPC update for 5.7

* Add a capability for enabling secure guests under the Protected
  Execution Framework ultravisor

* Various bug fixes and cleanups.
2020-03-31 10:45:49 -04:00
Paolo Bonzini cf39d37539 KVM/arm updates for Linux 5.7
- GICv4.1 support
 - 32bit host removal
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Merge tag 'kvmarm-5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

KVM/arm updates for Linux 5.7

- GICv4.1 support
- 32bit host removal
2020-03-31 10:44:53 -04:00
Paolo Bonzini 830948eb68 KVM: s390: Fix for error codes
- return the proper error to userspace when a signal interrupts the
   KSM unsharing operation
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Merge tag 'kvm-s390-next-5.7-3' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD

KVM: s390: Fix for error codes

- return the proper error to userspace when a signal interrupts the
  KSM unsharing operation
2020-03-30 09:02:26 -04:00
Christian Borntraeger 7a2653612b s390/gmap: return proper error code on ksm unsharing
If a signal is pending we might return -ENOMEM instead of -EINTR.
We should propagate the proper error during KSM unsharing.
unmerge_ksm_pages returns -ERESTARTSYS on signal_pending. This gets
translated by entry.S to -EINTR. It is important to get this error
code so that userspace can retry.

To make this clearer we also add -EINTR to the documentation of the
PV_ENABLE call, which calls unmerge_ksm_pages.

Fixes: 3ac8e38015 ("s390/mm: disable KSM for storage key enabled pages")
Reviewed-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Reported-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Tested-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2020-03-27 06:42:53 -04:00
Paul Mackerras 9a5788c615 KVM: PPC: Book3S HV: Add a capability for enabling secure guests
At present, on Power systems with Protected Execution Facility
hardware and an ultravisor, a KVM guest can transition to being a
secure guest at will.  Userspace (QEMU) has no way of knowing
whether a host system is capable of running secure guests.  This
will present a problem in future when the ultravisor is capable of
migrating secure guests from one host to another, because
virtualization management software will have no way to ensure that
secure guests only run in domains where all of the hosts can
support secure guests.

This adds a VM capability which has two functions: (a) userspace
can query it to find out whether the host can support secure guests,
and (b) userspace can enable it for a guest, which allows that
guest to become a secure guest.  If userspace does not enable it,
KVM will return an error when the ultravisor does the hypercall
that indicates that the guest is starting to transition to a
secure guest.  The ultravisor will then abort the transition and
the guest will terminate.

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Ram Pai <linuxram@us.ibm.com>
2020-03-26 11:09:04 +11:00
Marc Zyngier 541ad0150c arm: Remove 32bit KVM host support
That's it. Remove all references to KVM itself, and document
that although it is no more, the ABI between SVC and HYP still
exists.

Signed-off-by: Marc Zyngier <maz@kernel.org>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Will Deacon <will@kernel.org>
Acked-by: Vladimir Murzin <vladimir.murzin@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Christoffer Dall <christoffer.dall@arm.com>
2020-03-24 10:56:04 +00:00
Paolo Bonzini 2da1ed62d5 KVM: SVM: document KVM_MEM_ENCRYPT_OP, let userspace detect if SEV is available
Userspace has no way to query if SEV has been disabled with the
sev module parameter of kvm-amd.ko.  Actually it has one, but it
is a hack: do ioctl(KVM_MEM_ENCRYPT_OP, NULL) and check if it
returns EFAULT.  Make it a little nicer by returning zero for
SEV enabled and NULL argument, and while at it document the
ioctl arguments.

Cc: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-03-20 13:47:52 -04:00
Paolo Bonzini 1c482452d5 KVM: s390: Features and Enhancements for 5.7 part1
1. Allow to disable gisa
 2. protected virtual machines
   Protected VMs (PVM) are KVM VMs, where KVM can't access the VM's
   state like guest memory and guest registers anymore. Instead the
   PVMs are mostly managed by a new entity called Ultravisor (UV),
   which provides an API, so KVM and the PV can request management
   actions.
 
   PVMs are encrypted at rest and protected from hypervisor access
   while running.  They switch from a normal operation into protected
   mode, so we can still use the standard boot process to load a
   encrypted blob and then move it into protected mode.
 
   Rebooting is only possible by passing through the unprotected/normal
   mode and switching to protected again.
 
   One mm related patch will go via Andrews mm tree ( mm/gup/writeback:
   add callbacks for inaccessible pages)
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Merge tag 'kvm-s390-next-5.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD

KVM: s390: Features and Enhancements for 5.7 part1

1. Allow to disable gisa
2. protected virtual machines
  Protected VMs (PVM) are KVM VMs, where KVM can't access the VM's
  state like guest memory and guest registers anymore. Instead the
  PVMs are mostly managed by a new entity called Ultravisor (UV),
  which provides an API, so KVM and the PV can request management
  actions.

  PVMs are encrypted at rest and protected from hypervisor access
  while running.  They switch from a normal operation into protected
  mode, so we can still use the standard boot process to load a
  encrypted blob and then move it into protected mode.

  Rebooting is only possible by passing through the unprotected/normal
  mode and switching to protected again.

  One mm related patch will go via Andrews mm tree ( mm/gup/writeback:
  add callbacks for inaccessible pages)
2020-03-16 18:19:34 +01:00
Peter Xu 3ac40c404c KVM: Documentation: Update fast page fault for indirect sp
Clarify locking.rst to mention early that we're not enabling fast page
fault for indirect sps.  The previous wording is confusing, in that it
seems the proposed solution has been already implemented but it has not.

Signed-off-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-03-16 17:58:56 +01:00
Sean Christopherson 7ff6c03503 KVM: x86: Remove stateful CPUID handling
Remove the code for handling stateful CPUID 0x2 and mark the associated
flags as deprecated.  WARN if host CPUID 0x2.0.AL > 1, i.e. if by some
miracle a host with stateful CPUID 0x2 is encountered.

No known CPU exists that supports hardware accelerated virtualization
_and_ a stateful CPUID 0x2.  Barring an extremely contrived nested
virtualization scenario, stateful CPUID support is dead code.

Suggested-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-03-16 17:58:31 +01:00
Jay Zhou 3c9bd4006b KVM: x86: enable dirty log gradually in small chunks
It could take kvm->mmu_lock for an extended period of time when
enabling dirty log for the first time. The main cost is to clear
all the D-bits of last level SPTEs. This situation can benefit from
manual dirty log protect as well, which can reduce the mmu_lock
time taken. The sequence is like this:

1. Initialize all the bits of the dirty bitmap to 1 when enabling
   dirty log for the first time
2. Only write protect the huge pages
3. KVM_GET_DIRTY_LOG returns the dirty bitmap info
4. KVM_CLEAR_DIRTY_LOG will clear D-bit for each of the leaf level
   SPTEs gradually in small chunks

Under the Intel(R) Xeon(R) Gold 6152 CPU @ 2.10GHz environment,
I did some tests with a 128G windows VM and counted the time taken
of memory_global_dirty_log_start, here is the numbers:

VM Size        Before    After optimization
128G           460ms     10ms

Signed-off-by: Jay Zhou <jianjay.zhou@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-03-16 17:57:37 +01:00
Janosch Frank 04ed89dc4a KVM: s390: protvirt: Add KVM api documentation
Add documentation for KVM_CAP_S390_PROTECTED capability and the
KVM_S390_PV_COMMAND ioctl.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
[borntraeger@de.ibm.com: patch merging, splitting, fixing]
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2020-02-27 19:47:13 +01:00
Janosch Frank a421027987 DOCUMENTATION: Protected virtual machine introduction and IPL
Add documentation about protected KVM guests and description of changes
that are necessary to move a KVM VM into Protected Virtualization mode.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
[borntraeger@de.ibm.com: fixing and conversion to rst]
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2020-02-27 19:47:12 +01:00
Janosch Frank 68cf7b1f13 KVM: s390: protvirt: disallow one_reg
A lot of the registers are controlled by the Ultravisor and never
visible to KVM. Some fields in the sie control block are overlayed, like
gbea. As no known userspace uses the ONE_REG interface on s390 if sync
regs are available, no functionality is lost if it is disabled for
protected guests.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
[borntraeger@de.ibm.com: patch merging, splitting, fixing]
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2020-02-27 19:47:12 +01:00
Ulrich Weigand f65470661f KVM: s390/interrupt: do not pin adapter interrupt pages
The adapter interrupt page containing the indicator bits is currently
pinned. That means that a guest with many devices can pin a lot of
memory pages in the host. This also complicates the reference tracking
which is needed for memory management handling of protected virtual
machines. It might also have some strange side effects for madvise
MADV_DONTNEED and other things.

We can simply try to get the userspace page set the bits and free the
page. By storing the userspace address in the irq routing entry instead
of the guest address we can actually avoid many lookups and list walks
so that this variant is very likely not slower.

If userspace messes around with the memory slots the worst thing that
can happen is that we write to some other memory within that process.
As we get the the page with FOLL_WRITE this can also not be used to
write to shared read-only pages.

Signed-off-by: Ulrich Weigand <Ulrich.Weigand@de.ibm.com>
Acked-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
[borntraeger@de.ibm.com: patch simplification]
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2020-02-27 19:47:10 +01:00
Christian Borntraeger a93236fcbe KVM: s390: rstify new ioctls in api.rst
We also need to rstify the new ioctls that we added in parallel to the
rstification of the kvm docs.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-24 19:28:40 +01:00
Mauro Carvalho Chehab 120881b9e8 docs: virt: guest-halt-polling.txt convert to ReST
Due to some merge conflict, this file ended being alone under
Documentation/virtual.

The file itself is almost at ReST format. Just minor
adjustments are needed:

- Adjust title markup;
- Adjust a list identation;
- add a literal block markup;
- Add some blank lines.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12 20:10:08 +01:00
Mauro Carvalho Chehab 033741c6c9 docs: kvm: review-checklist.txt: rename to ReST
This file is already in ReST compatible format.
So, rename it and add to the kvm's index.rst.

While here, use the standard conversion for document titles.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12 20:10:07 +01:00
Mauro Carvalho Chehab 6012d9a9fa docs: kvm: Convert timekeeping.txt to ReST format
- Use document title and chapter markups;
- Add markups for literal blocks;
- Add markups for tables;
- use :field: for field descriptions;
- Add blank lines and adjust indentation.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12 20:10:06 +01:00
Mauro Carvalho Chehab a9700af64e docs: kvm: Convert s390-diag.txt to ReST format
This file is almost in ReST format. Just one change was
needed:

    - Add markups for a literal block and change its indentation.

While here, use the standard markup for the document title.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12 20:10:06 +01:00
Mauro Carvalho Chehab c849d86139 docs: kvm: Convert ppc-pv.txt to ReST format
- Use document title and chapter markups;
- Add markups for tables;
- Use list markups;
- Add markups for literal blocks;
- Add blank lines.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12 20:10:05 +01:00
Mauro Carvalho Chehab 320f3f74d9 docs: kvm: Convert nested-vmx.txt to ReST format
This file is almost in ReST format. Just a small set of
changes were needed:

    - Add markups for lists;
    - Add markups for a literal block;
    - Adjust whitespaces.

While here, use the standard markup for the document title.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12 20:10:04 +01:00
Mauro Carvalho Chehab 037d1f92ef docs: kvm: Convert mmu.txt to ReST format
- Use document title and chapter markups;
- Add markups for tables;
- Add markups for literal blocks;
- Add blank lines and adjust indentation.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12 20:10:03 +01:00
Mauro Carvalho Chehab 75e7fcdb4a docs: kvm: Convert locking.txt to ReST format
- Use document title and chapter markups;
- Add markups for literal blocks;
- use :field: for field descriptions;
- Add blank lines and adjust indentation.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12 20:10:02 +01:00
Mauro Carvalho Chehab 5a0af4806c docs: kvm: Convert hypercalls.txt to ReST format
- Use document title and chapter markups;
- Convert tables;
- Add markups for literal blocks;
- use :field: for field descriptions;
- Add blank lines and adjust indentation

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12 20:10:02 +01:00
Mauro Carvalho Chehab cec0e48be3 docs: kvm: arm/psci.txt: convert to ReST
- Add a title for the document;
- Adjust whitespaces for it to be properly formatted after
  parsed.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12 20:10:01 +01:00
Mauro Carvalho Chehab 69bf758bc8 docs: kvm: convert arm/hyp-abi.txt to ReST
- Add proper markups for titles;
- Adjust whitespaces and blank lines to match ReST
  needs;
- Mark literal blocks as such.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12 20:10:00 +01:00
Mauro Carvalho Chehab 106ee47dc6 docs: kvm: Convert api.txt to ReST format
convert api.txt document to ReST format while trying to keep
its format as close as possible with the authors intent, and
avoid adding uneeded markups.

- Use document title and chapter markups;
- Convert tables;
- Add markups for literal blocks;
- use :field: for field descriptions;
- Add blank lines and adjust indentation

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12 20:09:59 +01:00
Mauro Carvalho Chehab d3b52e4976 docs: kvm: convert devices/xive.txt to ReST
- Use title markups;
- adjust indentation and add blank lines as needed;
- adjust tables to match ReST accepted formats;
- mark code blocks as such.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12 20:09:58 +01:00
Mauro Carvalho Chehab 5cccf37974 docs: kvm: convert devices/xics.txt to ReST
- Use title markups;
- adjust indentation and add blank lines as needed;
- adjust tables to match ReST accepted formats;
- use :field: markups.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12 20:09:58 +01:00
Mauro Carvalho Chehab 6c972ba685 docs: kvm: convert devices/vm.txt to ReST
- Use title markups;
- adjust indentation and add blank lines as needed;
- use :field: markups;
- Use cross-references;
- mark code blocks as such.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12 20:09:57 +01:00
Mauro Carvalho Chehab aff7aeea54 docs: kvm: convert devices/vfio.txt to ReST
- Use standard title markup;
- adjust lists;
- mark code blocks as such.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12 20:09:56 +01:00
Mauro Carvalho Chehab e777a5bd98 docs: kvm: convert devices/vcpu.txt to ReST
- Use title markups;
- adjust indentation and add blank lines as needed;
- adjust tables to match ReST accepted formats;
- use :field: markups;
- mark code blocks as such.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12 20:09:55 +01:00
Mauro Carvalho Chehab e944743003 docs: kvm: convert devices/s390_flic.txt to ReST
- Use standard markup for document title;
- Adjust indentation and add blank lines as needed;
- use the notes markup;
- mark code blocks as such.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12 20:09:54 +01:00
Mauro Carvalho Chehab 05c47036c6 docs: kvm: convert devices/mpic.txt to ReST
This document is almost in ReST format. The only thing
needed is to mark a list as such and to add an extra
whitespace.

Yet, let's also use the standard document title markup,
as it makes easier if anyone wants later to add sessions
to it.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12 20:09:54 +01:00
Mauro Carvalho Chehab bf6154dba0 docs: kvm: convert devices/arm-vgit.txt to ReST
- Use title markups;
- change indent to match ReST syntax;
- use proper table markups;
- use literal block markups.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12 20:09:53 +01:00
Mauro Carvalho Chehab c0d1c8a0af docs: kvm: devices/arm-vgit-v3.txt to ReST
- Use title markups;
- change indent to match ReST syntax;
- use proper table markups;
- use literal block markups.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12 20:09:52 +01:00
Mauro Carvalho Chehab d371c011fc docs: kvm: devices/arm-vgic-its.txt to ReST format
- Fix document title to match ReST format
- Convert the table to be properly recognized
- use proper markups for literal blocks
- Some indentation fixes to match ReST

While here, add an index for kvm devices.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12 20:09:51 +01:00
Mauro Carvalho Chehab 263a19ff21 docs: virt: Convert msr.txt to ReST format
- Use document title markup;
- Convert tables;
- Add blank lines and adjust indentation.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12 20:09:51 +01:00
Mauro Carvalho Chehab 2756df60d0 docs: virt: convert halt-polling.txt to ReST format
- Fix document title to match ReST format
- Convert the table to be properly recognized
- Some indentation fixes to match ReST syntax.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12 20:09:50 +01:00
Mauro Carvalho Chehab c09708ccb4 docs: virt: user_mode_linux.rst: fix URL references
Several URLs are pointing to outdated places.

Update the references for the URLs whose contents still exists,
removing the others.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12 20:09:49 +01:00
Mauro Carvalho Chehab 72f8a49dc8 docs: virt: user_mode_linux.rst: update compiling instructions
Instead of pointing for a pre-2.4 and a seaparate patch,
update it to match current upstream, as UML was merged
a long time ago.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12 20:09:48 +01:00
Mauro Carvalho Chehab 7d94ab169b docs: virt: convert UML documentation to ReST
Despite being an old document, it contains lots of information
that could still be useful.

The document has a nice style with makes easy to convert to
ReST. So, let's convert it to ReST.

This patch does:

	- Use proper markups for titles;
	- Mark and proper indent literal blocks;
	- don't use an 'o' character for lists;
	- other minor changes required for the doc to be parsed.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12 20:09:47 +01:00
Mauro Carvalho Chehab 7bd460fc1d docs: kvm: add arm/pvtime.rst to index.rst
Add this file to a new kvm/arm index.rst, in order for it to
be shown as part of the virt book.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12 20:09:47 +01:00
Paolo Bonzini ef09f4f463 KVM: s390: Fixes and cleanups for 5.6
- fix register corruption
 - ENOTSUPP/EOPNOTSUPP mixed
 - reset cleanups/fixes
 - selftests
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Merge tag 'kvm-s390-next-5.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD

KVM: s390: Fixes and cleanups for 5.6
- fix register corruption
- ENOTSUPP/EOPNOTSUPP mixed
- reset cleanups/fixes
- selftests
2020-02-05 16:15:05 +01:00
Janosch Frank 7de3f1423f KVM: s390: Add new reset vcpu API
The architecture states that we need to reset local IRQs for all CPU
resets. Because the old reset interface did not support the normal CPU
reset we never did that on a normal reset.

Let's implement an interface for the missing normal and clear resets
and reset all local IRQs, registers and control structures as stated
in the architecture.

Userspace might already reset the registers via the vcpu run struct,
but as we need the interface for the interrupt clearing part anyway,
we implement the resets fully and don't rely on userspace to reset the
rest.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Link: https://lore.kernel.org/r/20200131100205.74720-4-frankja@linux.ibm.com
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2020-01-31 12:50:04 +01:00
Andrew Jones 290a6bb06d arm64: KVM: Add UAPI notes for swapped registers
Two UAPI system register IDs do not derive their values from the
ARM system register encodings. This is because their values were
accidentally swapped. As the IDs are API, they cannot be changed.
Add WARNING notes to point them out.

Suggested-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Andrew Jones <drjones@redhat.com>
[maz: turned XXX into WARNING]
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200120130825.28838-1-drjones@redhat.com
2020-01-23 10:38:14 +00:00
Paolo Bonzini 3525d0ccd9 KVM: Add support for secure guests under the Protected Execution
Framework (PEF) Ultravisor on POWER.
 
 This enables secure memory to be represented as device memory,
 which provides a way for the host to keep track of which pages of a
 secure guest have been moved into secure memory managed by the
 ultravisor and are no longer accessible by the host, and manage
 movement of pages between secure and normal memory.
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Merge tag 'kvm-ppc-uvmem-5.5-2' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc into HEAD

KVM: Add support for secure guests under the Protected Execution
Framework (PEF) Ultravisor on POWER.

This enables secure memory to be represented as device memory,
which provides a way for the host to keep track of which pages of a
secure guest have been moved into secure memory managed by the
ultravisor and are no longer accessible by the host, and manage
movement of pages between secure and normal memory.
2019-11-29 19:20:08 +01:00