If __setup_vm() is changed to setup_vm(), KUT will build tests with
PT_USER_MASK set on all PTEs. It is a better idea to move nNPT tests
to their own file so that tests don't need to fiddle with page tables midway.
The quick approach to do this would be to turn the current main into a
small helper, without calling __setup_vm() from helper.
setup_mmu_range() function in vm.c was modified to allocate new user
pages to implement nested page table.
Current implementation of nested page table does the page table build
up statistically with 2048 PTEs and one pml4 entry. With newly
implemented routine, nested page table can be implemented dynamically
based on the RAM size of VM which enables us to have separate memory
ranges to test various npt test cases.
Based on this implementation, minimal changes were required to be done
in below mentioned existing APIs:
npt_get_pde(), npt_get_pte(), npt_get_pdpe().
v1 -> v2
Added new patch for building up a nested page table dynamically and
did minimal changes required to make it adaptable with old test cases.
v2 -> v3
Added new patch to change setup_mmu_range to use it in implementation
of nested page table.
Added new patches to correct indentation errors in svm.c, svm_npt.c and
svm_tests.c.
Used scripts/Lindent from linux source code to fix indentation errors.
Last patch from this series was bounced back due to maximum characters for
patch was crossed, so resending the whole series again by spliting the patch in
multiples.
Manali Shukla (8):
x86: nSVM: Move common functionality of the main() to helper
run_svm_tests
x86: nSVM: Move all nNPT test cases from svm_tests.c to a separate
file.
x86: nSVM: Allow nSVM tests run with PT_USER_MASK enabled
x86: Improve set_mmu_range() to implement npt
x86: nSVM: Build up the nested page table dynamically
x86: nSVM: Correct indentation for svm.c
x86: nSVM: Correct indentation for svm_tests.c part-1
x86: nSVM: Correct indentation for svm_tests.c part-2
lib/x86/vm.c | 37 +-
lib/x86/vm.h | 3 +
x86/Makefile.common | 2 +
x86/Makefile.x86_64 | 2 +
x86/svm.c | 272 ++--
x86/svm.h | 5 +-
x86/svm_npt.c | 391 +++++
x86/svm_tests.c | 3535 ++++++++++++++++++++-----------------------
x86/unittests.cfg | 6 +
9 files changed, 2157 insertions(+), 2096 deletions(-)
create mode 100644 x86/svm_npt.c
--
2.30.2
