On 8/19/24 6:03 PM, Christoph Schlameuss wrote:
On Fri Aug 16, 2024 at 4:29 PM CEST, Janosch Frank wrote:
On 8/15/24 5:45 PM, Christoph Schlameuss wrote:
Add a test case verifying basic running and interaction of ucontrol VMs.
Fill the segment and page tables for allocated memory and map memory on
first access.
* uc_map_unmap
Store and load data to mapped and unmapped memory and use pic segment
translation handling to map memory on access.
Signed-off-by: Christoph Schlameuss <schlameuss@xxxxxxxxxxxxx>
---
.../selftests/kvm/s390x/ucontrol_test.c | 120 +++++++++++++++++-
1 file changed, 119 insertions(+), 1 deletion(-)
+static void uc_handle_exit_ucontrol(FIXTURE_DATA(uc_kvm) * self)
+{
+ struct kvm_run *run = self->run;
+
+ TEST_ASSERT_EQ(KVM_EXIT_S390_UCONTROL, run->exit_reason);
+ switch (run->s390_ucontrol.pgm_code) {
+ case PGM_SEGMENT_TRANSLATION:
+ pr_info("ucontrol pic segment translation 0x%llx\n",
+ run->s390_ucontrol.trans_exc_code);
+ /* map / make additional memory available */
+ struct kvm_s390_ucas_mapping map2 = {
+ .user_addr = (u64)gpa2hva(self, run->s390_ucontrol.trans_exc_code),
+ .vcpu_addr = run->s390_ucontrol.trans_exc_code,
+ .length = VM_MEM_EXT_SIZE,
+ };
+ pr_info("ucas map %p %p 0x%llx\n",
+ (void *)map2.user_addr, (void *)map2.vcpu_addr, map2.length);
+ TEST_ASSERT_EQ(0, ioctl(self->vcpu_fd, KVM_S390_UCAS_MAP, &map2));
+ break;
Why is this necessary if you fix up the mapping in the test?
This is also used within the uc_skey test to make sure the remap does
work after the unmap.
Maybe I'm blind because I'm still recovering but where exactly?
