KVM: selftests: Consolidate common code for populating ucall struct

Browse source

Make ucall() a common helper that populates struct ucall, and only calls
into arch code to make the actually call out to userspace.

Rename all arch-specific helpers to make it clear they're arch-specific,
and to avoid collisions with common helpers (one more on its way...)

Add WRITE_ONCE() to stores in ucall() code (as already done to aarch64
code in commit 9e2f6498ef ("selftests: KVM: Handle compiler
optimizations in ucall")) to prevent clang optimizations breaking ucalls.

Cc: Colton Lewis <coltonlewis@google.com>
Reviewed-by: Andrew Jones <andrew.jones@linux.dev>
Tested-by: Peter Gonda <pgonda@google.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Link: https://lore.kernel.org/r/20221006003409.649993-2-seanjc@google.com

...

This commit is contained in:

Sean Christopherson 2022-10-06 00:34:03 +00:00

parent b3d937722d

commit 7046638192

7 changed files with 61 additions and 74 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

1

tools/testing/selftests/kvm/Makefile

View file

23

tools/testing/selftests/kvm/include/ucall_common.h

View file

22

tools/testing/selftests/kvm/lib/aarch64/ucall.c

View file

23

tools/testing/selftests/kvm/lib/riscv/ucall.c

View file

23

tools/testing/selftests/kvm/lib/s390x/ucall.c

View file

20

tools/testing/selftests/kvm/lib/ucall_common.c

View file

23

tools/testing/selftests/kvm/lib/x86_64/ucall.c

View file