Svukte extension add HUKTE bit, bit[24] in hstatus CSR. The written
value will be masked when the svukte extension is not enabled.
When hstatus[HUKTE] bit is set, HLV/HLVX/HSV work in the U-mode should
do svukte check.
Signed-off-by: Fea.Wang <fea.w...@sifive.com>
Reviewed-by: Frank Chang <frank.ch...@sifive.com>
Reviewed-by: Jim Shu <jim....@sifive.com>
---
target/riscv/cpu_bits.h | 1 +
target/riscv/csr.c | 3 +++
2 files changed, 4 insertions(+)
diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h
index 4b9f899217..fe4e34c64a 100644
--- a/target/riscv/cpu_bits.h
+++ b/target/riscv/cpu_bits.h
@@ -604,6 +604,7 @@ typedef enum {
#define HSTATUS_VTVM 0x00100000
#define HSTATUS_VTW 0x00200000
#define HSTATUS_VTSR 0x00400000
+#define HSTATUS_HUKTE 0x01000000
#define HSTATUS_VSXL 0x300000000
#define HSTATUS32_WPRI 0xFF8FF87E
diff --git a/target/riscv/csr.c b/target/riscv/csr.c
index 1936a6f32a..b6fa8ae53f 100644
--- a/target/riscv/csr.c
+++ b/target/riscv/csr.c
@@ -3540,6 +3540,9 @@ static RISCVException read_hstatus(CPURISCVState *env,
int csrno,
static RISCVException write_hstatus(CPURISCVState *env, int csrno,
target_ulong val)
{
+ if (!env_archcpu(env)->cfg.ext_svukte) {
+ val = val & (~HSTATUS_HUKTE);
+ }
env->hstatus = val;
if (riscv_cpu_mxl(env) != MXL_RV32 && get_field(val, HSTATUS_VSXL) != 2) {
qemu_log_mask(LOG_UNIMP,
--
2.34.1
