[v3,2/3] target/riscv/cpu.c: create flag for ziccrse

Commit Message

Daniel Henrique Barboza Feb. 21, 2025, 3:37 p.m. UTC

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]>
---
 target/riscv/cpu.c         | 3 ++-
 target/riscv/cpu_cfg.h     | 3 +++
 target/riscv/tcg/tcg-cpu.c | 2 ++
 3 files changed, 7 insertions(+), 1 deletion(-)

Patch

diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index 522d6584e4..fc4632ce36 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),
@@ -1749,6 +1749,7 @@  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/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/tcg/tcg-cpu.c b/target/riscv/tcg/tcg-cpu.c
index ea8d77d06a..c93612b1da 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)