On Tue, 9 Jul 2024 14:57:03 +0200
Christoph Schlameuss <schlameuss@xxxxxxxxxxxxx> wrote:
> Add a test case manipulating s390 storage keys from within the ucontrol
> VM.
>
> Signed-off-by: Christoph Schlameuss <schlameuss@xxxxxxxxxxxxx>
> ---
> .../selftests/kvm/s390x/ucontrol_test.c | 83 +++++++++++++++++++
> 1 file changed, 83 insertions(+)
>
> diff --git a/tools/testing/selftests/kvm/s390x/ucontrol_test.c b/tools/testing/selftests/kvm/s390x/ucontrol_test.c
> index 4438cfc8bf53..64ad31f667e3 100644
> --- a/tools/testing/selftests/kvm/s390x/ucontrol_test.c
> +++ b/tools/testing/selftests/kvm/s390x/ucontrol_test.c
> @@ -81,6 +81,32 @@ asm("test_mem_pgm:\n"
> " j 0b\n"
> );
>
> +/* Test program manipulating storage keys */
> +extern char test_skey_pgm[];
> +asm("test_skey_pgm:\n"
> + "xgr %r0, %r0\n"
> +
> + "0:\n"
> + " ahi %r0,1\n"
> + " st %r1,0(%r5,%r6)\n"
> +
> + " iske %r1,%r6\n"
> + " ahi %r0,1\n"
> + " diag 0,0,0x44\n"
> +
> + " sske %r1,%r6\n"
> + " iske %r1,%r6\n"
> + " ahi %r0,1\n"
> + " diag 0,0,0x44\n"
> +
> + " rrbe %r1,%r6\n"
> + " iske %r1,%r6\n"
> + " ahi %r0,1\n"
> + " diag 0,0,0x44\n"
> +
> + " j 0b\n"
> +);
> +
> FIXTURE(uc_kvm)
> {
> struct kvm_s390_sie_block *sie_block;
> @@ -389,6 +415,63 @@ static void uc_assert_diag44(FIXTURE_DATA(uc_kvm) * self)
> TEST_ASSERT_EQ(0x440000, sie_block->ipb);
> }
>
> +TEST_F(uc_kvm, uc_skey)
> +{
> + u64 test_vaddr = self->base_gpa + VM_MEM_SIZE - (SZ_1M / 2);
> + struct kvm_sync_regs *sync_regs = &self->run->s.regs;
> + struct kvm_s390_sie_block *sie_block = self->sie_block;
> + struct kvm_run *run = self->run;
> + u8 skeyvalue = 0x34;
> +
> + init_st_pt(self);
> +
> + /* copy test_skey_pgm to code_hva / code_gpa */
> + TH_LOG("copy code %p to vm mapped memory %p / %p",
> + &test_skey_pgm, (void *)self->code_hva, (void *)self->code_gpa);
> + memcpy((void *)self->code_hva, &test_skey_pgm, PAGE_SIZE);
> +
> + /* set register content for test_skey_pgm to access not mapped memory*/
missing space before */
> + sync_regs->gprs[1] = skeyvalue;
> + sync_regs->gprs[5] = self->base_gpa;
> + sync_regs->gprs[6] = test_vaddr;
> + run->kvm_dirty_regs |= KVM_SYNC_GPRS;
> +
> + run->kvm_dirty_regs |= KVM_SYNC_CRS;
> + TH_LOG("set CR0 to 0x%llx", sync_regs->crs[0]);
> +
> + self->sie_block->ictl |= ICTL_OPEREXC | ICTL_PINT;
> + self->sie_block->cpuflags &= ~CPUSTAT_KSS;
> + run->psw_mask = 0x0400000180000000ULL; /* DAT enabled + 64 bit mode */
> + run->psw_addr = self->code_gpa;
> + ASSERT_EQ(0, uc_run_once(self));
> + ASSERT_EQ(true, uc_handle_exit(self));
> + ASSERT_EQ(0, sync_regs->gprs[0]);
> + ASSERT_EQ(13, run->exit_reason);
can you use macros here instead of magic values?
> + ASSERT_EQ(40, sie_block->icptcode);
same here
> +
> + ASSERT_EQ(0, uc_run_once(self));
> + ASSERT_EQ(false, uc_handle_exit(self));
> + ASSERT_EQ(2, sync_regs->gprs[0]);
> + ASSERT_EQ(0x06, sync_regs->gprs[1]);
> + uc_assert_diag44(self);
> +
> + sync_regs->gprs[1] = skeyvalue;
> + run->kvm_dirty_regs |= KVM_SYNC_GPRS;
> + ASSERT_EQ(0, uc_run_once(self));
> + ASSERT_EQ(false, uc_handle_exit(self));
> + ASSERT_EQ(3, sync_regs->gprs[0]);
> + ASSERT_EQ(skeyvalue, sync_regs->gprs[1]);
> + uc_assert_diag44(self);
> +
> + sync_regs->gprs[1] = skeyvalue;
> + run->kvm_dirty_regs |= KVM_SYNC_GPRS;
> + ASSERT_EQ(0, uc_run_once(self));
> + ASSERT_EQ(false, uc_handle_exit(self));
> + ASSERT_EQ(4, sync_regs->gprs[0]);
> + ASSERT_EQ(skeyvalue & 0xfb, sync_regs->gprs[1]);
> + uc_assert_diag44(self);
> +}
> +
> TEST_F(uc_kvm, uc_map_unmap)
> {
> struct kvm_sync_regs *sync_regs = &self->run->s.regs;
