Remove the double underscore in front of `__has_extension` in crosvm.h.
Double underscores in identifiers are reserved for the compiler's
internal use and as it so happens, `__has_extension` is a macro that
clang defines for code to determine whether the compiler supports a
given feature.
We shouldn't be using double underscores in any of the variable names in
this header file but for now just fix the problematic one so that the
code can actually compile under clang.
BUG=b:80150167
TEST=Compile one of the test plugins with clang
Change-Id: Ibb59e72c968a7f245bd6cc693da99f9263eedf33
Signed-off-by: Chirantan Ekbote <chirantan@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1341100
Reviewed-by: Zach Reizner <zachr@chromium.org>
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
Now that cargo fmt has landed, run it over everything at once to bring
rust source to the standard formatting.
TEST=cargo test
BUG=None
Change-Id: Ic95a48725e5a40dcbd33ba6d5aef2bd01e91865b
Reviewed-on: https://chromium-review.googlesource.com/1259287
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Zach Reizner <zachr@chromium.org>
Reviewed-by: Zach Reizner <zachr@chromium.org>
The Scm object was made to reduce the number of heap allocations in
the hot paths of poll loops, at the cost of some code complexity. As it
turns out, the number of file descriptors being sent or received is
usually just one or limited to a fixed amount that can easily be covered
with a fixed size stack allocated buffer.
This change implements that solution, with heap allocation as a backup
in the rare case that many file descriptors must be sent or received.
This change also moves the msg and cmsg manipulation code out of C and
into pure Rust. The move was necessary to allocate the correct amount
of buffer space at compile time. It also improves safety by reducing the
scope of unsafe code. Deleting the code for building the C library is
also a nice bonus.
Finally, the removal of the commonly used Scm struct required
transitioning existing usage to the ScmSocket trait based methods. This
includes all those changes.
TEST=cargo test
BUG=None
Change-Id: If27ba297f5416dd9b8bc686ce740866912fa0aa0
Reviewed-on: https://chromium-review.googlesource.com/1186146
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Zach Reizner <zachr@chromium.org>
Reviewed-by: Zach Reizner <zachr@chromium.org>
KVM_GET_MSRS may return less MSRs that were requested; do not fail but
instead let callers to know how many were fetched.
BUG=None
TEST=cargo test --features plugin
Change-Id: Ie14a3d38b66bfe34f5279543bea9c6c78423527e
Signed-off-by: Dmitry Torokhov <dtor@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1192232
Reviewed-by: Zach Reizner <zachr@chromium.org>
Reviewed-by: Dylan Reid <dgreid@chromium.org>
Userspace is interested in number of supported MSRs even if supplied
buffer is too small, as then it can intelligently [re]allocate the
buffer and repeat the call instead of doing this blindly. So let's
always populate 'out_count'in crosvm_get_msr_index_list() call.
Obviously if there is hard error we will not be able to supply a
meaningful number, so 0 will be returned, but in case of E2BIG error we
can return the real number.
Also let's do the same for get_supported_cpuids() and
get_emulated_cpuids() calls.
BUG=b:111083877
TEST=cargo test -p kvm; cargo test --features=plugin
Change-Id: I37a8d719103fac44597b88ddecb6b8af2dd54ac8
Signed-off-by: Dmitry Torokhov <dtor@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1185293
Reviewed-by: Zach Reizner <zachr@chromium.org>
A simple stat collecting. Uses RAII to gather latency on all exit
paths from function/block. The underscore in "let _u = STATS.u(...)" is
to pacify "unused variable" warning. Using "let _ = " makes compiler
optimize out the call.
Rust makes it particularly hard to convert enums from integers, so I had
to add a hack that stores Enum on every invocation of the STATS.u. Looking
at disassembly, it added one move of constant to the field of STATS.entries;
no heap operations or cloning. A clever alternative using macros was
suggested by semenzato@, but I decided saving an instruction was not
worth the complexity.
The output is currently printed on the destruction of crosvm, so tests
print out stats on exit. We probably should find a better place for it
though.
BUG=None
TEST=cargo test --release --features plugin
Change-Id: I78a8920e9896b717af3aaea14f8ed6013be6b94f
Reviewed-on: https://chromium-review.googlesource.com/1036473
Commit-Ready: Slava Malyugin <slavamn@chromium.org>
Tested-by: Slava Malyugin <slavamn@chromium.org>
Reviewed-by: Zach Reizner <zachr@chromium.org>
This change allows plugin to retrieve and set various VM and VCPU states:
interrupt controller, PIT, LAPIC and MP state.
BUG=b:76083711
TEST=cargo test -p kvm
Change-Id: Ie32a67b0cd4a1f0a19ccd826a6e1c9dc25670f95
Signed-off-by: Dmitry Torokhov <dtor@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/986511
Reviewed-by: Zach Reizner <zachr@chromium.org>
We have decided that API defined in crosvm.h should signal errors by
returning negative values derived from common errno error codes. To
avoid confusion within the rest of crosvm code that is using positive
erro codes, let's perform the conversion to negative on that crosvm API
boundary, so it is contained.
TEST=cargo test --features plugin
BUG=None
Change-Id: Icb1e719c8e99c95fdc32dce13a30d6ff8d3d9dc7
Signed-off-by: Dmitry Torokhov <dtor@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/947563
Reviewed-by: Zach Reizner <zachr@chromium.org>
This plumbs calls to KVM_GET_SUPPORTED_CPUID and KVM_GET_EMULATED_CPUID
to be available to plugins.
TEST=cargo test --features plugin; cargo test -p kvm
BUG=chromium:800626
Change-Id: I98879599b5f970c6c2720772658689a505d8abe1
Signed-off-by: Dmitry Torokhov <dtor@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/938674
Reviewed-by: Zach Reizner <zachr@chromium.org>
We need to convert between protobuf and KVM format of cpuid data in
several places, so let's add helpers to plugin_proto crate.
TEST=cargo test --features plugin; cargo test -p kvm
BUG=chromium:800626
Change-Id: Ida7b59825d2146b0d02711e441f477d90dd4263a
Signed-off-by: Dmitry Torokhov <dtor@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/939660
Reviewed-by: Zach Reizner <zachr@chromium.org>
The raw_os_error() and errno() return positive values (errno values are
all positive), but the rest of crosvm plugin C API works with negative
return codes, so we need to convert raw_os_error()/errno() into
negatives as well.
TEST=cargo test --features plugin; cargo test -p kvm
BUG=None
Change-Id: I8bd72c2e67cb227a638e5c9478cd2f781f0783d0
Signed-off-by: Dmitry Torokhov <dtor@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/939865
Reviewed-by: Zach Reizner <zachr@chromium.org>
The guest may need to check for KVM extensions before blindly using
them.
TEST=cargo test --features plugin; cargo test -p kvm; ./build_test
BUG=chromium:800626
Change-Id: If87b928753cd71adeabac4fc7732c3fce7265834
Reviewed-on: https://chromium-review.googlesource.com/906008
Commit-Ready: Zach Reizner <zachr@chromium.org>
Tested-by: Zach Reizner <zachr@chromium.org>
Reviewed-by: Dylan Reid <dgreid@chromium.org>
The guest expects to be able to read the CPUID, so the plugin process
needs to specify what the CPUID for each VCPU will have.
TEST=cargo test --features plugin; ./build_test
BUG=chromium:800626
Change-Id: I9258540ab2501126c3d8cadbd09b7fc01d19f7a9
Reviewed-on: https://chromium-review.googlesource.com/906006
Commit-Ready: Zach Reizner <zachr@chromium.org>
Tested-by: Zach Reizner <zachr@chromium.org>
Reviewed-by: Dylan Reid <dgreid@chromium.org>
Dirty logging is not necessary for every memory region, so the plugin
process should be able to specific exactly which regions it would like
dirty logging enabled for.
TEST=cargo test --features plugin
BUG=chromium:800626
Change-Id: I28b8285357e7de1c8c3a1392bdfdb4853ec5a654
Reviewed-on: https://chromium-review.googlesource.com/900294
Commit-Ready: Zach Reizner <zachr@chromium.org>
Tested-by: Zach Reizner <zachr@chromium.org>
Reviewed-by: Dylan Reid <dgreid@chromium.org>
The MSRs are useful for booting a full operating system that requires
them.
TEST=cargo test --features plugin; cargo test -p kvm; ./build_test
BUG=chromium:800626
Change-Id: I817fbf3e6868c85b373808bd48e568b5b2b458eb
Reviewed-on: https://chromium-review.googlesource.com/897412
Commit-Ready: Zach Reizner <zachr@chromium.org>
Tested-by: Zach Reizner <zachr@chromium.org>
Reviewed-by: Zach Reizner <zachr@chromium.org>
The debug registers are useful to access for the plugin process in some
cases.
TEST=cargo test --features plugin; cargo test -p kvm; ./build_test
BUG=chromium:800626
Change-Id: I8f3f6c31c6989061a43cef948cf5b4e64bd52d30
Reviewed-on: https://chromium-review.googlesource.com/896945
Commit-Ready: Zach Reizner <zachr@chromium.org>
Tested-by: Zach Reizner <zachr@chromium.org>
Reviewed-by: Zach Reizner <zachr@chromium.org>
This is the shared library used by the plugin process to speak to a
crosvm main process that spawned it.
TEST=cargo build --features plugin
BUG=chromium:800626
Change-Id: I100e7ddfc1099fbdf1462c171785a861e075d5d7
Reviewed-on: https://chromium-review.googlesource.com/869356
Commit-Ready: Zach Reizner <zachr@chromium.org>
Tested-by: Zach Reizner <zachr@chromium.org>
Reviewed-by: Zach Reizner <zachr@chromium.org>
This header file defines the C API used to interface with crosvm as a
plugin process.
TEST=None
BUG=chromium:800626
Change-Id: Ie06b833e25dab8f31f64d8bc8b4b521b61d1ca04
Reviewed-on: https://chromium-review.googlesource.com/764267
Commit-Ready: Zach Reizner <zachr@chromium.org>
Tested-by: Zach Reizner <zachr@chromium.org>
Reviewed-by: Dmitry Torokhov <dtor@chromium.org>
Reviewed-by: Dylan Reid <dgreid@chromium.org>
