[PATCH v13 23/26] target/riscv: add satp_mode profile support

[Daniel Henrique Barboza]

'satp_mode' is a requirement for supervisor profiles like RVA22S64.
User-mode/application profiles like RVA22U64 doesn't care.

Add 'satp_mode' to the profile description. If a profile requires it,
set it during cpu_set_profile(). We'll also check it during finalize()
to validate if the running config implements the profile.

Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
---
 target/riscv/cpu.c         |  1 +
 target/riscv/cpu.h         |  1 +
 target/riscv/tcg/tcg-cpu.c | 40 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 42 insertions(+)

diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index 1dea5db52d..6795f5da41 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -1543,6 +1543,7 @@ static RISCVCPUProfile RVA22U64 = {
     .name = "rva22u64",
     .misa_ext = RVI | RVM | RVA | RVF | RVD | RVC | RVU,
     .priv_spec = RISCV_PROFILE_ATTR_UNUSED,
+    .satp_mode = RISCV_PROFILE_ATTR_UNUSED,
     .ext_offsets = {
         CPU_CFG_OFFSET(ext_zicsr), CPU_CFG_OFFSET(ext_zihintpause),
         CPU_CFG_OFFSET(ext_zba), CPU_CFG_OFFSET(ext_zbb),
diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index 485d2da3c2..6c5fceb5f5 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -82,6 +82,7 @@ typedef struct riscv_cpu_profile {
     bool enabled;
     bool user_set;
     int priv_spec;
+    int satp_mode;
     const int32_t ext_offsets[];
 } RISCVCPUProfile;
 
diff --git a/target/riscv/tcg/tcg-cpu.c b/target/riscv/tcg/tcg-cpu.c
index 4d25fc43d2..152f95718b 100644
--- a/target/riscv/tcg/tcg-cpu.c
+++ b/target/riscv/tcg/tcg-cpu.c
@@ -766,6 +766,31 @@ void riscv_cpu_validate_set_extensions(RISCVCPU *cpu, 
Error **errp)
     riscv_cpu_disable_priv_spec_isa_exts(cpu);
 }
 
+#ifndef CONFIG_USER_ONLY
+static bool riscv_cpu_validate_profile_satp(RISCVCPU *cpu,
+                                            RISCVCPUProfile *profile,
+                                            bool send_warn)
+{
+    int satp_max = satp_mode_max_from_map(cpu->cfg.satp_mode.supported);
+
+    if (profile->satp_mode > satp_max) {
+        if (send_warn) {
+            bool is_32bit = riscv_cpu_is_32bit(cpu);
+            const char *req_satp = satp_mode_str(profile->satp_mode, is_32bit);
+            const char *cur_satp = satp_mode_str(satp_max, is_32bit);
+
+            warn_report("Profile %s requires satp mode %s, "
+                        "but satp mode %s was set", profile->name,
+                        req_satp, cur_satp);
+        }
+
+        return false;
+    }
+
+    return true;
+}
+#endif
+
 static void riscv_cpu_validate_profile(RISCVCPU *cpu,
                                        RISCVCPUProfile *profile)
 {
@@ -775,6 +800,13 @@ static void riscv_cpu_validate_profile(RISCVCPU *cpu,
     bool profile_impl = true;
     int i;
 
+#ifndef CONFIG_USER_ONLY
+    if (profile->satp_mode != RISCV_PROFILE_ATTR_UNUSED) {
+        profile_impl = riscv_cpu_validate_profile_satp(cpu, profile,
+                                                       send_warn);
+    }
+#endif
+
     if (profile->priv_spec != RISCV_PROFILE_ATTR_UNUSED &&
         profile->priv_spec != env->priv_ver) {
         profile_impl = false;
@@ -1079,6 +1111,14 @@ static void cpu_set_profile(Object *obj, Visitor *v, 
const char *name,
         cpu->env.priv_ver = profile->priv_spec;
     }
 
+#ifndef CONFIG_USER_ONLY
+    if (profile->satp_mode != RISCV_PROFILE_ATTR_UNUSED) {
+        const char *satp_prop = satp_mode_str(profile->satp_mode,
+                                              riscv_cpu_is_32bit(cpu));
+        object_property_set_bool(obj, satp_prop, profile->enabled, NULL);
+    }
+#endif
+
     for (i = 0; misa_bits[i] != 0; i++) {
         uint32_t bit = misa_bits[i];
 
-- 
2.43.0