MP.alias3+rfi-data+dmb

Description

allowThis shows thread-local forwarding of a write to a read with distinct VA but the same PA, in a potentially non-speculative path.

Source

[download toml source]
Page table setup Code
physical pa1 pa2; x |-> pa1; y |-> pa2; z |-> pa1; *pa1 = 0; *pa2 = 0;
Thread 0
{R0=extz(0x1, 64), R1=x, R3=z, R5=y}
STR X0,[X1] LDR X2,[X3] STR X2,[X5]
Thread 1
{R1=y, R3=x}
LDR X0,[X1] DMB SY LDR X2,[X3]
Final State
1:X0 = 1 & 1:X2 = 0

Execution Diagrams

Results

ETS MP.alias3+rfi-data+dmb allowed (1 of 1) 1483ms
strong MP.alias3+rfi-data+dmb allowed (1 of 1) 1431ms

Command-line invocation

isla-axiomatic --arch=/path/to/rems-project/isla-snapshots/aarch64.ir --config=/path/to/rems-project/isla/configs/aarch64_mmu_on.toml --footprint-config=/path/to/rems-project/isla/configs/aarch64.toml --model=/path/to/rems-project/systems-isla-tests/models/aarch64_mmu_strong_ETS.cat --armv8-page-tables --check-sat-using "(then dt2bv qe simplify solve-eqs bv)" --remove-uninteresting safe --dot . -t /path/to/litmus-tests/litmus-tests-armv8a-system-vmsa/tests/pgtable/HAND/MP.alias3+rfi-data+dmb.litmus.toml

To generate diagrams we use model aarch64_mmu_no_axioms.cat to get diagrams of forbidden executions. To generate LaTeX sources of each test, pass --latex=.