target/riscv: Disable "G" by default

Because "G" virtual extension expands to "IMAFD", we cannot separately
disable extensions like "F" or "D" without disabling "G".  Because all
"IMAFD" are enabled by default, it's harmless to disable "G" by default.

Signed-off-by: Tsukasa OI <research_trasio@irq.a4lg.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <cab7205f1d7668f642fa242386543334af6bc1bd.1652583332.git.research_trasio@irq.a4lg.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>

diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index e439716337e953c4ba24af85faee9413df5e362a..1fb76b4295f13a7fd9c564ffb9c19eed91fba7a0 100644 (file)
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -812,7 +812,7 @@ static Property riscv_cpu_properties[] = {
     /* Defaults for standard extensions */
     DEFINE_PROP_BOOL("i", RISCVCPU, cfg.ext_i, true),
     DEFINE_PROP_BOOL("e", RISCVCPU, cfg.ext_e, false),
-    DEFINE_PROP_BOOL("g", RISCVCPU, cfg.ext_g, true),
+    DEFINE_PROP_BOOL("g", RISCVCPU, cfg.ext_g, false),
     DEFINE_PROP_BOOL("m", RISCVCPU, cfg.ext_m, true),
     DEFINE_PROP_BOOL("a", RISCVCPU, cfg.ext_a, true),
     DEFINE_PROP_BOOL("f", RISCVCPU, cfg.ext_f, true),