[RFC PATCH 1/8] target/riscv: Add cfg properities for Zvfbfa extensions

[Max Chou <max.chou@sifive.com>]

The Zvfbfa extension adds more complete BF16 vector compute support
and requires the Zve32f and Zfbfmin extensions.

Signed-off-by: Max Chou <max.chou@sifive.com>
---
 target/riscv/cpu.c                | 1 +
 target/riscv/cpu_cfg_fields.h.inc | 1 +
 target/riscv/tcg/tcg-cpu.c        | 8 ++++++++
 3 files changed, 10 insertions(+)

diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index d055ddf4623..fc0614dadba 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -169,6 +169,7 @@ const RISCVIsaExtData isa_edata_arr[] = {
     ISA_EXT_DATA_ENTRY(zve64f, PRIV_VERSION_1_10_0, ext_zve64f),
     ISA_EXT_DATA_ENTRY(zve64d, PRIV_VERSION_1_10_0, ext_zve64d),
     ISA_EXT_DATA_ENTRY(zve64x, PRIV_VERSION_1_10_0, ext_zve64x),
+    ISA_EXT_DATA_ENTRY(zvfbfa, PRIV_VERSION_1_13_0, ext_zvfbfa),
     ISA_EXT_DATA_ENTRY(zvfbfmin, PRIV_VERSION_1_12_0, ext_zvfbfmin),
     ISA_EXT_DATA_ENTRY(zvfbfwma, PRIV_VERSION_1_12_0, ext_zvfbfwma),
     ISA_EXT_DATA_ENTRY(zvfh, PRIV_VERSION_1_12_0, ext_zvfh),
diff --git a/target/riscv/cpu_cfg_fields.h.inc b/target/riscv/cpu_cfg_fields.h.inc
index e2d116f0dfb..f69be188e4a 100644
--- a/target/riscv/cpu_cfg_fields.h.inc
+++ b/target/riscv/cpu_cfg_fields.h.inc
@@ -96,6 +96,7 @@ BOOL_FIELD(ext_zvks)
 BOOL_FIELD(ext_zvksc)
 BOOL_FIELD(ext_zvksg)
 BOOL_FIELD(ext_zmmul)
+BOOL_FIELD(ext_zvfbfa)
 BOOL_FIELD(ext_zvfbfmin)
 BOOL_FIELD(ext_zvfbfwma)
 BOOL_FIELD(ext_zvfh)
diff --git a/target/riscv/tcg/tcg-cpu.c b/target/riscv/tcg/tcg-cpu.c
index 78fb2791847..07b2b137934 100644
--- a/target/riscv/tcg/tcg-cpu.c
+++ b/target/riscv/tcg/tcg-cpu.c
@@ -704,6 +704,14 @@ void riscv_cpu_validate_set_extensions(RISCVCPU *cpu, Error **errp)
         return;
     }
 
+    if (cpu->cfg.ext_zvfbfa) {
+        if (!cpu->cfg.ext_zve32f || !cpu->cfg.ext_zfbfmin) {
+            error_setg(errp, "Zvfbfa extension requires Zve32f extension "
+                             "and Zfbfmin extension");
+            return;
+        }
+    }
+
     if ((cpu->cfg.ext_zdinx || cpu->cfg.ext_zhinxmin) && !cpu->cfg.ext_zfinx) {
         error_setg(errp, "Zdinx/Zhinx/Zhinxmin extensions require Zfinx");
         return;
-- 
2.43.0