[PULL,37/59] target/riscv/cpu.c: create flag for ziccrse

Commit Message

Alistair Francis March 5, 2025, 1:52 a.m. UTC

From: Daniel Henrique Barboza <[e-mail]>

At this moment ziccrse is a TCG always enabled named feature for
priv_ver > 1.11 that has no exclusive flag. In the next patch we'll make
the KVM driver turn ziccrse off if the extension isn't available in the
host, and we'll need an ext_ziccrse flag in the CPU state for that.

Create an exclusive flag for it like we do with other named features.
As with any named features we already have, it won't be exposed to
users.

Signed-off-by: Daniel Henrique Barboza <[e-mail]>
Reviewed-by: Andrew Jones <[e-mail]>
Message-ID: <[e-mail]>
Signed-off-by: Alistair Francis <[e-mail]>
---
 target/riscv/cpu_cfg.h     | 3 +++
 target/riscv/cpu.c         | 3 ++-
 target/riscv/tcg/tcg-cpu.c | 2 ++
 3 files changed, 7 insertions(+), 1 deletion(-)

Patch

diff --git a/target/riscv/cpu_cfg.h b/target/riscv/cpu_cfg.h
index 3f3c1118c0..8a843482cc 100644
--- a/target/riscv/cpu_cfg.h
+++ b/target/riscv/cpu_cfg.h
@@ -166,6 +166,9 @@  struct RISCVCPUConfig {
     bool has_priv_1_12;
     bool has_priv_1_11;
 
+    /* Always enabled for TCG if has_priv_1_11 */
+    bool ext_ziccrse;
+
     /* Vendor-specific custom extensions */
     bool ext_xtheadba;
     bool ext_xtheadbb;
diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index a4ee381a07..47424fd5e2 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -105,7 +105,7 @@  const RISCVIsaExtData isa_edata_arr[] = {
     ISA_EXT_DATA_ENTRY(ziccamoa, PRIV_VERSION_1_11_0, has_priv_1_11),
     ISA_EXT_DATA_ENTRY(ziccif, PRIV_VERSION_1_11_0, has_priv_1_11),
     ISA_EXT_DATA_ENTRY(zicclsm, PRIV_VERSION_1_11_0, has_priv_1_11),
-    ISA_EXT_DATA_ENTRY(ziccrse, PRIV_VERSION_1_11_0, has_priv_1_11),
+    ISA_EXT_DATA_ENTRY(ziccrse, PRIV_VERSION_1_11_0, ext_ziccrse),
     ISA_EXT_DATA_ENTRY(zicfilp, PRIV_VERSION_1_12_0, ext_zicfilp),
     ISA_EXT_DATA_ENTRY(zicfiss, PRIV_VERSION_1_13_0, ext_zicfiss),
     ISA_EXT_DATA_ENTRY(zicond, PRIV_VERSION_1_12_0, ext_zicond),
@@ -1742,6 +1742,7 @@  const RISCVCPUMultiExtConfig riscv_cpu_named_features[] = {
     MULTI_EXT_CFG_BOOL("zic64b", ext_zic64b, true),
     MULTI_EXT_CFG_BOOL("ssstateen", ext_ssstateen, true),
     MULTI_EXT_CFG_BOOL("sha", ext_sha, true),
+    MULTI_EXT_CFG_BOOL("ziccrse", ext_ziccrse, true),
 
     { },
 };
diff --git a/target/riscv/tcg/tcg-cpu.c b/target/riscv/tcg/tcg-cpu.c
index 929ed5fd2c..f1d971eec1 100644
--- a/target/riscv/tcg/tcg-cpu.c
+++ b/target/riscv/tcg/tcg-cpu.c
@@ -360,6 +360,8 @@  static void riscv_cpu_update_named_features(RISCVCPU *cpu)
 
     cpu->cfg.ext_sha = riscv_has_ext(&cpu->env, RVH) &&
                        cpu->cfg.ext_ssstateen;
+
+    cpu->cfg.ext_ziccrse = cpu->cfg.has_priv_1_11;
 }
 
 static void riscv_cpu_validate_g(RISCVCPU *cpu)