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Use vm_create_without_vcpus() instead of open coding a rough equivalent.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Use vm_create_without_vcpus() in set_boot_cpu_id instead of open coding
the equivlant now that the "without_vcpus" variant does
vm_adjust_num_guest_pages().
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Move the call to vm_adjust_num_guest_pages() from vm_create_with_vcpus()
down into vm_create_without_vcpus(). This will allow a future patch to
make the "w/o vCPUs" variant the common inner helper, e.g. so that the
"with_vcpus" helper calls the "without_vcpus" helper, instead of having
them be separate paths.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Add VM creation helpers to expose/return 'struct vcpu' so that tests
don't have to hardcode a VCPU_ID or make assumptions about what vCPU ID
is used by the framework just to retrieve a vCPU the test created.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Add helpers for the various one-off helpers used by x86's vCPU state
save/restore helpers, and convert the other open coded ioctl()s to use
existing helpers.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Move the get/set part of the MP_STATE and GUEST_DEBUG helpers to the end
to align with the many other ioctl() wrappers/helpers. Note, this is not
an endorsement of the predominant style, the goal is purely to provide
consistency in the selftests.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Consolidate the helper for retrieving the list of save/restore MSRs and
the list of feature MSRs, and use the common helpers in the related
get_msr_index_features test. Switching to the common helpers eliminates
the testcase that KVM returns the same -E2BIG result if the input number
of MSRs is '1' versus '0', but considered that testcase isn't very
interesting, e.g. '0' and '1' are equally arbitrary, and certainly not
worth the additional code.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Assert that KVM_SET_MSRS returns '0' or '1' when setting XSS to a
non-zero value. The ioctl() itself should "succeed", its only the
setting of the XSS MSR that should fail/fault.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Cache the list of MSRs to save restore, mostly to justify not freeing the
list in the caller, which simplifies consumption of the list.
Opportunistically move the XSS test's so called is_supported_msr() to
common code as kvm_msr_is_in_save_restore_list(). The XSS is "supported"
by KVM, it's simply not in the save/restore list because KVM doesn't yet
allow a non-zero value.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Rework the KVM_ENABLE_CAP helpers to take the cap and arg0; literally
every current user, and likely every future user, wants to set 0 or 1
arguments and nothing else.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Add __vm_enable_cap() and use it for negative tests that expect
KVM_ENABLE_CAP to fail. Opportunistically clean up the MAX_VCPU_ID test
error messages.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Add a backpointer to 'struct vcpu' so that tests can get at the owning
VM when passing around a vCPU object. Long term, this will be little
more than a nice-to-have feature, but in the short term it is a critical
step toward purging the VM+vcpu_id ioctl mess without introducing even
more churn.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Move the asserts for the many REDIST_REGS accesses into common helpers
instead of copy+pasting the same, unhelpful asserts over and over. Not
providing the actual (or expected) value makes it unnecessarily painful
to debug failures, especially since test_assert() prints the errno
unconditionally, e.g. on success, it may print a stale, misleading errno.
Use kvm_device_attr_get() to handle the "success" check so that the
"success" and "expected == actual" asserts are separated, which will make
it far less likely that a user incorrectly assumes the ioctl() failed.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Split the get/set device_attr helpers instead of using a boolean param to
select between get and set. Duplicating upper level wrappers is a very,
very small price to pay for improved readability, and having constant (at
compile time) inputs will allow the selftests framework to sanity check
ioctl() invocations.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Drop 'int' returns from *_device_has_attr() helpers that assert the
return is '0', there's no point in returning '0' and "requiring" the
caller to perform a redundant assertion.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Rename kvm_device_check_attr() and its variants to kvm_has_device_attr()
to be consistent with the ioctl names and with other helpers in the KVM
selftests framework.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Multiplex the return value and fd (on success) in __kvm_create_device()
to mimic common library helpers that return file descriptors, e.g. open().
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Move KVM_CREATE_DEVICE_TEST to its own helper, identifying "real" versus
"test" device creation based on a hardcoded boolean buried in the middle
of a param list is painful for readers.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Remove the two calls that pass @test=true to kvm_create_device() and drop
the @test param entirely. The two removed calls don't check the return
value of kvm_create_device(), so other than verifying KVM doesn't explode,
which is extremely unlikely given that the non-test variant was _just_
called, they are pointless and provide no validation coverage.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Use the KVM_IOCTL_ERROR() macro to generate error messages for a handful
of one-off arm64 ioctls. The calls in question are made without an
associated struct kvm_vm/kvm_vcpu as they are used to configure those
structs, i.e. can't be easily converted to e.g. vcpu_ioctl().
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Fold kvm_util_internal.h into kvm_util_base.h, i.e. make all KVM utility
stuff "public". Hiding struct implementations from tests has been a
massive failure, as it has led to pointless and poorly named wrappers,
unnecessarily opaque code, etc...
Not to mention that the approach was a complete failure as evidenced by
the non-zero number of tests that were including kvm_util_internal.h.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Make regs_dump() and sregs_dump() static, they're only implemented by
x86 and only used internally.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Use __KVM_SYSCALL_ERROR() to report and pretty print non-KVM syscall and
ioctl errors, e.g. for mmap(), munmap(), uffd ioctls, etc...
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Use the recently introduced KVM-specific ioctl() helpers instead of open
coding calls to ioctl() just to pretty print the ioctl name.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Make kvm_ioctl() a macro wrapper and print the _name_ of the ioctl on
failure instead of the number.
Deliberately do not use __stringify(), as that will expand the ioctl all
the way down to its numerical sequence, again the intent is to print the
name of the macro.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Use the recently introduced VM-specific ioctl() helpers instead of open
coding calls to ioctl() just to pretty print the ioctl name. Keep a few
open coded assertions that provide additional info.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Make vm_ioctl() a macro wrapper and print the _name_ of the ioctl on
failure instead of the number.
Deliberately do not use __stringify(), as that will expand the ioctl all
the way down to its numerical sequence. Again the intent is to print the
name of the macro.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Add vcpu_get() to wrap vcpu_find() and deduplicate a pile of code that
asserts the requested vCPU exists.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Drop vcpu_get_fd(), it no longer has any users, and really should not
exist as the framework has failed if tests need to manually operate on
a vCPU fd.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Use vcpu_access_device_attr() in arm's arch_timer test instead of
manually retrieving the vCPU's fd. This will allow dropping vcpu_get_fd()
in a future patch.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Add __vcpu_run() so that tests that want to avoid asserts on KVM_RUN
failures don't need to open code the ioctl() call.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Use the recently introduced vCPU-specific ioctl() helpers instead of
open coding calls to ioctl() just to pretty print the ioctl name.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Split vcpu_nested_state_set() into a wrapper that asserts, and an inner
helper that does not. Passing a bool is all kinds of awful as it's
unintuitive for readers and requires returning an 'int' from a function
that for most users can never return anything other than "success".
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Drop @mode from vm_create() and have it use VM_MODE_DEFAULT. Add and use
an inner helper, __vm_create(), to service the handful of tests that want
something other than VM_MODE_DEFAULT.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Make vcpu_ioctl() a macro wrapper and pretty the _name_ of the ioctl on
failure instead of the number. Add inner macros to allow handling cases
where the name of the ioctl needs to be resolved higher up the stack, and
to allow using the formatting for non-ioctl syscalls without being
technically wrong.
Deliberately do not use __stringify(), as that will expand the ioctl all
the way down to its numerical sequence, again the intent is to print the
name of the macro.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Add a second underscore to inner ioctl() helpers to better align with
commonly accepted kernel coding style, and to allow using a single
underscore variant in the future for macro shenanigans.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Drop the @perm param from vm_create() and always open VM file descriptors
with O_RDWR. There's no legitimate use case for other permissions, and
if a selftest wants to do oddball negative testing it can open code the
necessary bits instead of forcing a bunch of tests to provide useless
information.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Drop declarations for allocate_kvm_dirty_log() and vm_create_device(),
which no longer have implementations.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
When iterating over vCPUs, invoke access_v3_redist_reg() on the "current"
vCPU instead of vCPU0, which is presumably what was intended by iterating
over all vCPUs.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Update 'ret' with the return value of _kvm_device_access() prior to
asserting that ret is non-zero. In the current code base, the flaw is
benign as 'ret' is guaranteed to be -EBUSY from the previous run_vcpu(),
which also means that errno==EBUSY prior to _kvm_device_access(), thus
the "errno == EFAULT" part of the assert means that a false negative is
impossible (unless the kernel is being truly mean and spuriously setting
errno=EFAULT while returning success).
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The x86-only KVM_CAP_TRIPLE_FAULT_EVENT was (appropriately) renamed to
KVM_CAP_X86_TRIPLE_FAULT_EVENT when the patches were applied, but the
docs and selftests got left behind. Fix them.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
s390:
* add an interface to provide a hypervisor dump for secure guests
* improve selftests to show tests
x86:
* Intel IPI virtualization
* Allow getting/setting pending triple fault with KVM_GET/SET_VCPU_EVENTS
* PEBS virtualization
* Simplify PMU emulation by just using PERF_TYPE_RAW events
* More accurate event reinjection on SVM (avoid retrying instructions)
* Allow getting/setting the state of the speaker port data bit
* Rewrite gfn-pfn cache refresh
* Refuse starting the module if VM-Entry/VM-Exit controls are inconsistent
* "Notify" VM exit
The selftests nested code only supports 4-level paging at the moment.
This means it cannot map nested guest physical addresses with more than
48 bits. Allow perf_test_util nested mode to work on hosts with more
than 48 physical addresses by restricting the guest test region to
48-bits.
While here, opportunistically fix an off-by-one error when dealing with
vm_get_max_gfn(). perf_test_util.c was treating this as the maximum
number of GFNs, rather than the maximum allowed GFN. This didn't result
in any correctness issues, but it did end up shifting the test region
down slightly when using huge pages.
Suggested-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: David Matlack <dmatlack@google.com>
Message-Id: <20220520233249.3776001-12-dmatlack@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Add an option to dirty_log_perf_test that configures the vCPUs to run in
L2 instead of L1. This makes it possible to benchmark the dirty logging
performance of nested virtualization, which is particularly interesting
because KVM must shadow L1's EPT/NPT tables.
For now this support only works on x86_64 CPUs with VMX. Otherwise
passing -n results in the test being skipped.
Signed-off-by: David Matlack <dmatlack@google.com>
Message-Id: <20220520233249.3776001-11-dmatlack@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Break up the long lines for LIBKVM and alphabetize each architecture.
This makes reading the Makefile easier, and will make reading diffs to
LIBKVM easier.
No functional change intended.
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: David Matlack <dmatlack@google.com>
Message-Id: <20220520233249.3776001-10-dmatlack@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The linker does obey strong/weak symbols when linking static libraries,
it simply resolves an undefined symbol to the first-encountered symbol.
This means that defining __weak arch-generic functions and then defining
arch-specific strong functions to override them in libkvm will not
always work.
More specifically, if we have:
lib/generic.c:
void __weak foo(void)
{
pr_info("weak\n");
}
void bar(void)
{
foo();
}
lib/x86_64/arch.c:
void foo(void)
{
pr_info("strong\n");
}
And a selftest that calls bar(), it will print "weak". Now if you make
generic.o explicitly depend on arch.o (e.g. add function to arch.c that
is called directly from generic.c) it will print "strong". In other
words, it seems that the linker is free to throw out arch.o when linking
because generic.o does not explicitly depend on it, which causes the
linker to lose the strong symbol.
One solution is to link libkvm.a with --whole-archive so that the linker
doesn't throw away object files it thinks are unnecessary. However that
is a bit difficult to plumb since we are using the common selftests
makefile rules. An easier solution is to drop libkvm.a just link
selftests with all the .o files that were originally in libkvm.a.
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: David Matlack <dmatlack@google.com>
Message-Id: <20220520233249.3776001-9-dmatlack@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Drop the "all: $(STATIC_LIBS)" rule. The KVM selftests already depend
on $(STATIC_LIBS), so there is no reason to have an extra "all" rule.
Suggested-by: Peter Xu <peterx@redhat.com>
Signed-off-by: David Matlack <dmatlack@google.com>
Message-Id: <20220520233249.3776001-8-dmatlack@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Create a small helper function to check if a given EPT/VPID capability
is supported. This will be re-used in a follow-up commit to check for 1G
page support.
No functional change intended.
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: David Matlack <dmatlack@google.com>
Message-Id: <20220520233249.3776001-7-dmatlack@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This is a VMX-related macro so move it to vmx.h. While here, open code
the mask like the rest of the VMX bitmask macros.
No functional change intended.
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: David Matlack <dmatlack@google.com>
Message-Id: <20220520233249.3776001-6-dmatlack@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Refactor nested_map() to specify that it explicityl wants 4K mappings
(the existing behavior) and push the implementation down into
__nested_map(), which can be used in subsequent commits to create huge
page mappings.
No function change intended.
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: David Matlack <dmatlack@google.com>
Message-Id: <20220520233249.3776001-5-dmatlack@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
