[Qemu-devel] [PATCH stable-1.1 07/26] target-xtensa: add MMU pagewalking tests

[Michael Roth]

From: Max Filippov <address@hidden>

Signed-off-by: Max Filippov <address@hidden>
Signed-off-by: Blue Swirl <address@hidden>
---
 tests/tcg/xtensa/test_mmu.S |  221 ++++++++++++++++++++++++++++++++++++++++---
 1 files changed, 207 insertions(+), 14 deletions(-)

diff --git a/tests/tcg/xtensa/test_mmu.S b/tests/tcg/xtensa/test_mmu.S
index 52d5774..5d87fbb 100644
--- a/tests/tcg/xtensa/test_mmu.S
+++ b/tests/tcg/xtensa/test_mmu.S
@@ -293,26 +293,219 @@ test store_prohibited
     assert  eq, a2, a3
 test_end
 
-test dtlb_autoload
-    set_vector kernel, 0
-
-    movi    a2, 0xd4000000
+/* Set up page table entry vaddr->paddr, ring=pte_ring, attr=pte_attr
+ * and DTLB way 7 to cover this PTE, ring=pt_ring, attr=pt_attr
+ */
+.macro pt_setup pt_ring, pt_attr, pte_ring, vaddr, paddr, pte_attr
+    movi    a2, 0x80000000
     wsr     a2, ptevaddr
-    movi    a3, 0x00001013
-    s32i    a3, a2, 4
+
+    movi    a3, 0x80000007 | (((\vaddr) >> 10) & 0xfffff000) /* way 7 */
+    movi    a4, 0x04000003 | ((\pt_ring) << 4) /* PADDR 64M */
+    wdtlb   a4, a3
+    isync
+
+    movi    a3, ((\paddr) & 0xfffff000) | ((\pte_ring) << 4) | (\pte_attr)
+    movi    a1, ((\vaddr) >> 12) << 2
+    add     a2, a1, a2
+    s32i    a3, a2, 0
+
+    movi    a3, 0x80000007 | (((\vaddr) >> 10) & 0xfffff000) /* way 7 */
+    movi    a4, 0x04000000 | ((\pt_ring) << 4) | (\pt_attr) /* PADDR 64M */
+    wdtlb   a4, a3
+    isync
+
+    movi    a3, (\vaddr)
+.endm
+
+/* out: PS.RING=ring, PS.EXCM=excm, a3=vaddr */
+.macro go_ring ring, excm, vaddr
+    movi    a3, 10f
+    pitlb   a3, a3
+    ritlb1  a2, a3
+    movi    a1, 0x10
+    or      a2, a2, a1
+    movi    a1, 0x000ff000
+    and     a3, a3, a1
+    movi    a1, 4
+    or      a3, a3, a1
+    witlb   a2, a3
+    movi    a3, 10f
+    movi    a1, 0x000fffff
+    and     a1, a3, a1
+
+    movi    a2, 0
+    wsr     a2, excvaddr
+
+    movi    a3, \vaddr
+    movi    a2, 0x4000f | ((\ring) << 6) | ((\excm) << 4)
+    jx      a1
+10:
+    wsr     a2, ps
+    isync
+.endm
+
+/* in: a3 -- virtual address to test */
+.macro assert_auto_tlb
+    movi    a2, 0x4000f
+    wsr     a2, ps
+    isync
+    pdtlb   a2, a3
+    movi    a1, 0xfffff01f
+    and     a2, a2, a1
+    movi    a1, 0xfffff000
+    and     a1, a1, a3
+    xor     a1, a1, a2
+    assert  gei, a1, 0x10
+    movi    a2, 0x14
+    assert  lt, a1, a2
+.endm
+
+/* in: a3 -- virtual address to test */
+.macro assert_no_auto_tlb
+    movi    a2, 0x4000f
+    wsr     a2, ps
+    isync
     pdtlb   a2, a3
     movi    a1, 0x10
     and     a1, a1, a2
     assert  eqi, a1, 0
-    l8ui    a1, a3, 0
-    pdtlb   a2, a3
-    movi    a1, 0xfffff010
-    and     a1, a1, a2
-    movi    a3, 0x00001010
-    assert  eq, a1, a3
-    movi    a1, 0xf
+.endm
+
+.macro assert_sr sr, v
+    rsr     a2, \sr
+    movi    a1, (\v)
+    assert  eq, a1, a2
+.endm
+
+.macro assert_epc1_1m vaddr
+    movi    a2, (\vaddr)
+    movi    a1, 0xfffff
     and     a1, a1, a2
-    assert  lti, a1, 4
+    rsr     a2, epc1
+    assert  eq, a1, a2
+.endm
+
+test dtlb_autoload
+    set_vector kernel, 0
+
+    pt_setup    0, 3, 1, 0x1000, 0x1000, 3
+    assert_no_auto_tlb
+
+    l8ui    a1, a3, 0
+
+    rsr     a2, excvaddr
+    assert  eq, a2, a3
+
+    assert_auto_tlb
+test_end
+
+test autoload_load_store_privilege
+    set_vector kernel, 0
+    set_vector double, 2f
+
+    pt_setup    0, 3, 0, 0x2000, 0x2000, 3
+    movi    a3, 0x2004
+    assert_no_auto_tlb
+
+    movi    a2, 0x4005f    /* ring 1 + excm => cring == 0 */
+    wsr     a2, ps
+    isync
+1:
+    l32e    a2, a3, -4     /* ring used */
+    test_fail
+2:
+    rsr     a2, excvaddr
+    addi    a1, a3, -4
+    assert  eq, a1, a2
+
+    assert_auto_tlb
+    assert_sr depc, 1b
+    assert_sr exccause, 26
+test_end
+
+test autoload_pte_load_prohibited
+    set_vector kernel, 2f
+
+    pt_setup    0, 3, 0, 0x3000, 0, 0xc
+    assert_no_auto_tlb
+1:
+    l32i    a2, a3, 0
+    test_fail
+2:
+    rsr     a2, excvaddr
+    assert  eq, a2, a3
+
+    assert_auto_tlb
+    assert_sr epc1, 1b
+    assert_sr exccause, 28
+test_end
+
+test autoload_pt_load_prohibited
+    set_vector kernel, 2f
+
+    pt_setup    0, 0xc, 0, 0x4000, 0x4000, 3
+    assert_no_auto_tlb
+1:
+    l32i    a2, a3, 0
+    test_fail
+2:
+    rsr     a2, excvaddr
+    assert  eq, a2, a3
+
+    assert_no_auto_tlb
+    assert_sr epc1, 1b
+    assert_sr exccause, 24
+test_end
+
+test autoload_pt_privilege
+    set_vector  kernel, 2f
+    pt_setup    0, 3, 1, 0x5000, 0, 3
+    go_ring     1, 0, 0x5001
+
+    l8ui    a2, a3, 0
+1:
+    syscall
+2:
+    rsr     a2, excvaddr
+    assert  eq, a2, a3
+
+    assert_auto_tlb
+    assert_epc1_1m 1b
+    assert_sr exccause, 1
+test_end
+
+test autoload_pte_privilege
+    set_vector  kernel, 2f
+    pt_setup    0, 3, 0, 0x6000, 0, 3
+    go_ring     1, 0, 0x6001
+1:
+    l8ui    a2, a3, 0
+    syscall
+2:
+    rsr     a2, excvaddr
+    assert  eq, a2, a3
+
+    assert_auto_tlb
+    assert_epc1_1m 1b
+    assert_sr exccause, 26
+test_end
+
+test autoload_3_level_pt
+    set_vector  kernel, 2f
+    pt_setup    1, 3, 1, 0x00400000, 0, 3
+    pt_setup    1, 3, 1, 0x80001000, 0x2000000, 3
+    go_ring     1, 0, 0x00400001
+1:
+    l8ui    a2, a3, 0
+    syscall
+2:
+    rsr     a2, excvaddr
+    assert  eq, a2, a3
+
+    assert_no_auto_tlb
+    assert_epc1_1m 1b
+    assert_sr exccause, 24
 test_end
 
 test_suite_end
-- 
1.7.4.1