diff mbox series

[v4,44/45] target/arm: Enable SME for user-only

Message ID 20220628042117.368549-45-richard.henderson@linaro.org
State Superseded
Headers show
Series target/arm: Scalable Matrix Extension | expand

Commit Message

Richard Henderson June 28, 2022, 4:21 a.m. UTC 
Enable SME, TPIDR2_EL0, and FA64 if supported by the cpu.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/cpu.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

Comments

Peter Maydell July 4, 2022, 12:22 p.m. UTC | #1 
On Tue, 28 Jun 2022 at 06:02, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> Enable SME, TPIDR2_EL0, and FA64 if supported by the cpu.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>

thanks
-- PMM
diff mbox series

Patch

diff --git a/target/arm/cpu.c b/target/arm/cpu.c
index 20cb622083..87d836fb2f 100644
--- a/target/arm/cpu.c
+++ b/target/arm/cpu.c
@@ -210,6 +210,17 @@  static void arm_cpu_reset(DeviceState *dev)
                                              CPACR_EL1, ZEN, 3);
             env->vfp.zcr_el[1] = cpu->sve_default_vq - 1;
         }
+        /* and for SME instructions, with default vector length, and TPIDR2 */
+        if (cpu_isar_feature(aa64_sme, cpu)) {
+            env->cp15.sctlr_el[1] |= SCTLR_EnTP2;
+            env->cp15.cpacr_el1 = FIELD_DP64(env->cp15.cpacr_el1,
+                                             CPACR_EL1, SMEN, 3);
+            env->vfp.smcr_el[1] = cpu->sme_default_vq - 1;
+            if (cpu_isar_feature(aa64_sme_fa64, cpu)) {
+                env->vfp.smcr_el[1] = FIELD_DP64(env->vfp.smcr_el[1],
+                                                 SMCR, FA64, 1);
+            }
+        }
         /*
          * Enable 48-bit address space (TODO: take reserved_va into account).
          * Enable TBI0 but not TBI1.