From: Rajnesh Kanwal <rkanwal@rivosinc.com>
Date: Wed, 5 Feb 2025 11:18:50 +0000 (+0000)
Subject: target/riscv: machine: Add Control Transfer Record state description
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=bda6522e3f9002040fc223c12457b849328a1d39;p=qemu.git

target/riscv: machine: Add Control Transfer Record state description

Add a subsection to machine.c to migrate CTR CSR state

Signed-off-by: Rajnesh Kanwal <rkanwal@rivosinc.com>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Message-ID: <20250205-b4-ctr_upstream_v6-v6-6-439d8e06c8ef@rivosinc.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---

diff --git a/target/riscv/machine.c b/target/riscv/machine.c
index d8445244ab..889e2b6570 100644
--- a/target/riscv/machine.c
+++ b/target/riscv/machine.c
@@ -300,6 +300,30 @@ static const VMStateDescription vmstate_envcfg = {
     }
 };
 
+static bool ctr_needed(void *opaque)
+{
+    RISCVCPU *cpu = opaque;
+
+    return cpu->cfg.ext_smctr || cpu->cfg.ext_ssctr;
+}
+
+static const VMStateDescription vmstate_ctr = {
+    .name = "cpu/ctr",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .needed = ctr_needed,
+    .fields = (const VMStateField[]) {
+        VMSTATE_UINT64(env.mctrctl, RISCVCPU),
+        VMSTATE_UINT32(env.sctrdepth, RISCVCPU),
+        VMSTATE_UINT32(env.sctrstatus, RISCVCPU),
+        VMSTATE_UINT64(env.vsctrctl, RISCVCPU),
+        VMSTATE_UINT64_ARRAY(env.ctr_src, RISCVCPU, 16 << SCTRDEPTH_MAX),
+        VMSTATE_UINT64_ARRAY(env.ctr_dst, RISCVCPU, 16 << SCTRDEPTH_MAX),
+        VMSTATE_UINT64_ARRAY(env.ctr_data, RISCVCPU, 16 << SCTRDEPTH_MAX),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
 static bool pmu_needed(void *opaque)
 {
     RISCVCPU *cpu = opaque;
@@ -450,6 +474,7 @@ const VMStateDescription vmstate_riscv_cpu = {
         &vmstate_jvt,
         &vmstate_elp,
         &vmstate_ssp,
+        &vmstate_ctr,
         NULL
     }
 };