diff options
| author | Peter Maydell <peter.maydell@linaro.org> | 2020-03-30 22:04:00 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2020-05-04 10:32:46 +0100 |
| commit | ce3125bed935a12e619a8253c19340ecaa899347 (patch) | |
| tree | cb34167cf7fc1b8a20a26d6a4740c4fc32368312 /target/arm/cpu64.c | |
| parent | ff7de2fc2c994030bfb83af9ddc9a3cd70ce3e88 (diff) | |
target/arm: Implement ARMv8.2-TTS2UXN
The ARMv8.2-TTS2UXN feature extends the XN field in stage 2
translation table descriptors from just bit [54] to bits [54:53],
allowing stage 2 to control execution permissions separately for EL0
and EL1. Implement the new semantics of the XN field and enable
the feature for our 'max' CPU.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200330210400.11724-5-peter.maydell@linaro.org
Diffstat (limited to 'target/arm/cpu64.c')
| -rw-r--r-- | target/arm/cpu64.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c index 74afc28d53..e232c0ea12 100644 --- a/target/arm/cpu64.c +++ b/target/arm/cpu64.c @@ -673,6 +673,7 @@ static void aarch64_max_initfn(Object *obj) t = FIELD_DP64(t, ID_AA64MMFR1, VH, 1); t = FIELD_DP64(t, ID_AA64MMFR1, PAN, 2); /* ATS1E1 */ t = FIELD_DP64(t, ID_AA64MMFR1, VMIDBITS, 2); /* VMID16 */ + t = FIELD_DP64(t, ID_AA64MMFR1, XNX, 1); /* TTS2UXN */ cpu->isar.id_aa64mmfr1 = t; t = cpu->isar.id_aa64mmfr2; @@ -706,6 +707,7 @@ static void aarch64_max_initfn(Object *obj) u = FIELD_DP32(u, ID_MMFR4, HPDS, 1); /* AA32HPD */ u = FIELD_DP32(u, ID_MMFR4, AC2, 1); /* ACTLR2, HACTLR2 */ u = FIELD_DP32(u, ID_MMFR4, CNP, 1); /* TTCNP */ + u = FIELD_DP32(u, ID_MMFR4, XNX, 1); /* TTS2UXN */ cpu->isar.id_mmfr4 = u; u = cpu->isar.id_aa64dfr0; |