[PATCH kvmtool 5/8] riscv: Add zbb extension support

Anup Patel
2023-05-10T08:39:41Z

The zbb extension allows software to use basic bitmanip instructions.
Let us add the zbb extension to the Guest device tree whenever it is
supported by the host.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
---
riscv/fdt.c | 1 +
riscv/include/kvm/kvm-config-arch.h | 3 +++
2 files changed, 4 insertions(+)

diff --git a/riscv/fdt.c b/riscv/fdt.c
index 977e962..17d6757 100644
--- a/riscv/fdt.c
+++ b/riscv/fdt.c
@@ -19,6 +19,7 @@ struct isa_ext_info isa_info_arr[] = {
{"sstc", KVM_RISCV_ISA_EXT_SSTC},
{"svinval", KVM_RISCV_ISA_EXT_SVINVAL},
{"svpbmt", KVM_RISCV_ISA_EXT_SVPBMT},
+ {"zbb", KVM_RISCV_ISA_EXT_ZBB},
{"zicbom", KVM_RISCV_ISA_EXT_ZICBOM},
{"zihintpause", KVM_RISCV_ISA_EXT_ZIHINTPAUSE},
};
diff --git a/riscv/include/kvm/kvm-config-arch.h b/riscv/include/kvm/kvm-config-arch.h
index 56676e3..8448b1a 100644
--- a/riscv/include/kvm/kvm-config-arch.h
+++ b/riscv/include/kvm/kvm-config-arch.h
@@ -34,6 +34,9 @@ struct kvm_config_arch {
OPT_BOOLEAN('\0', "disable-svpbmt", \
&(cfg)->ext_disabled[KVM_RISCV_ISA_EXT_SVPBMT], \
"Disable Svpbmt Extension"), \
+ OPT_BOOLEAN('\0', "disable-zbb", \
+ &(cfg)->ext_disabled[KVM_RISCV_ISA_EXT_ZBB], \
+ "Disable Zbb Extension"), \
OPT_BOOLEAN('\0', "disable-zicbom", \
&(cfg)->ext_disabled[KVM_RISCV_ISA_EXT_ZICBOM], \
"Disable Zicbom Extension"), \
--
2.34.1