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[v3,05/25] target/arm: Add isar_feature_aa64_rme

Message ID 20230222023336.915045-6-richard.henderson@linaro.org
State Superseded
Headers show
Series target/arm: Implement FEAT_RME | expand

Commit Message

Richard Henderson Feb. 22, 2023, 2:33 a.m. UTC 
Add the missing field for ID_AA64PFR0, and the predicate.
Disable it if EL3 is forced off by the board or command-line.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/cpu.h | 6 ++++++
 target/arm/cpu.c | 4 ++++
 2 files changed, 10 insertions(+)

Comments

Philippe Mathieu-Daudé Feb. 22, 2023, 9:41 a.m. UTC | #1 
On 22/2/23 03:33, Richard Henderson wrote:
> Add the missing field for ID_AA64PFR0, and the predicate.
> Disable it if EL3 is forced off by the board or command-line.
> 
> Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
>   target/arm/cpu.h | 6 ++++++
>   target/arm/cpu.c | 4 ++++
>   2 files changed, 10 insertions(+)

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
diff mbox series

Patch

diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index cb4e405f04..b046f96e4e 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -2190,6 +2190,7 @@  FIELD(ID_AA64PFR0, SEL2, 36, 4)
 FIELD(ID_AA64PFR0, MPAM, 40, 4)
 FIELD(ID_AA64PFR0, AMU, 44, 4)
 FIELD(ID_AA64PFR0, DIT, 48, 4)
+FIELD(ID_AA64PFR0, RME, 52, 4)
 FIELD(ID_AA64PFR0, CSV2, 56, 4)
 FIELD(ID_AA64PFR0, CSV3, 60, 4)
 
@@ -3808,6 +3809,11 @@  static inline bool isar_feature_aa64_sel2(const ARMISARegisters *id)
     return FIELD_EX64(id->id_aa64pfr0, ID_AA64PFR0, SEL2) != 0;
 }
 
+static inline bool isar_feature_aa64_rme(const ARMISARegisters *id)
+{
+    return FIELD_EX64(id->id_aa64pfr0, ID_AA64PFR0, RME) != 0;
+}
+
 static inline bool isar_feature_aa64_vh(const ARMISARegisters *id)
 {
     return FIELD_EX64(id->id_aa64mmfr1, ID_AA64MMFR1, VH) != 0;
diff --git a/target/arm/cpu.c b/target/arm/cpu.c
index 876ab8f3bf..83685ed247 100644
--- a/target/arm/cpu.c
+++ b/target/arm/cpu.c
@@ -1947,6 +1947,10 @@  static void arm_cpu_realizefn(DeviceState *dev, Error **errp)
         cpu->isar.id_dfr0 = FIELD_DP32(cpu->isar.id_dfr0, ID_DFR0, COPSDBG, 0);
         cpu->isar.id_aa64pfr0 = FIELD_DP64(cpu->isar.id_aa64pfr0,
                                            ID_AA64PFR0, EL3, 0);
+
+        /* Disable the realm management extension, which requires EL3. */
+        cpu->isar.id_aa64pfr0 = FIELD_DP64(cpu->isar.id_aa64pfr0,
+                                           ID_AA64PFR0, RME, 0);
     }
 
     if (!cpu->has_el2) {