[RFC PATCH v9 09/23] target/arm: Handle PSTATE.ALLINT on taking an exception

From: Jinjie Ruan via <qemu-devel@nongnu.org>
To: <peter.maydell@linaro.org>, <eduardo@habkost.net>,
	<marcel.apfelbaum@gmail.com>, <philmd@linaro.org>,
	<wangyanan55@huawei.com>, <richard.henderson@linaro.org>,
	<qemu-devel@nongnu.org>, <qemu-arm@nongnu.org>
Cc: <ruanjinjie@huawei.com>
Subject: [RFC PATCH v9 09/23] target/arm: Handle PSTATE.ALLINT on taking an exception
Date: Thu, 21 Mar 2024 13:07:58 +0000	[thread overview]
Message-ID: <20240321130812.2983113-10-ruanjinjie@huawei.com> (raw)
In-Reply-To: <20240321130812.2983113-1-ruanjinjie@huawei.com>

Set or clear PSTATE.ALLINT on taking an exception to ELx according to the
SCTLR_ELx.SPINTMASK bit.

Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
v9:
- Not check SCTLR_NMI in arm_cpu_do_interrupt_aarch64().
v3:
- Add Reviewed-by.
---
 target/arm/helper.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/target/arm/helper.c b/target/arm/helper.c
index b57114d35d..967e833ee8 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -11730,6 +11730,14 @@ static void arm_cpu_do_interrupt_aarch64(CPUState *cs)
         }
     }
 
+    if (cpu_isar_feature(aa64_nmi, cpu)) {
+        if (!(env->cp15.sctlr_el[new_el] & SCTLR_SPINTMASK)) {
+            new_mode |= PSTATE_ALLINT;
+        } else {
+            new_mode &= ~PSTATE_ALLINT;
+        }
+    }
+
     pstate_write(env, PSTATE_DAIF | new_mode);
     env->aarch64 = true;
     aarch64_restore_sp(env, new_el);
-- 
2.34.1


