Signed-off-by: Alistair Francis <alistair.fran...@wdc.com>
---
target/riscv/cpu.c | 6 ++++++
target/riscv/cpu.h | 7 +++++++
target/riscv/cpu_bits.h | 3 +++
target/riscv/cpu_helper.c | 7 +++++++
target/riscv/csr.c | 25 +++++++++++++++++++++++++
target/riscv/op_helper.c | 4 ++++
6 files changed, 52 insertions(+)
diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index e61cf46a73..ac8f53a49d 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -237,6 +237,9 @@ static void riscv_cpu_dump_state(CPUState *cs, FILE *f, int
flags)
#ifndef CONFIG_USER_ONLY
qemu_fprintf(f, " %s " TARGET_FMT_lx "\n", "mhartid ", env->mhartid);
qemu_fprintf(f, " %s " TARGET_FMT_lx "\n", "mstatus ", *env->mstatus);
+#ifdef TARGET_RISCV32
+ qemu_fprintf(f, " %s " TARGET_FMT_lx "\n", "mstatush ", *env->mstatush);
+#endif
if (riscv_has_ext(env, RVH)) {
qemu_fprintf(f, " %s " TARGET_FMT_lx "\n", "hstatus ", env->hstatus);
qemu_fprintf(f, " %s " TARGET_FMT_lx "\n", "vsstatus ", env->vsstatus);
@@ -473,6 +476,9 @@ static void riscv_cpu_init(Object *obj)
#ifndef CONFIG_USER_ONLY
env->mstatus = &env->mstatus_novirt;
+# ifdef TARGET_RISCV32
+ env->mstatush = &env->mstatush_novirt;
+# endif
#endif
}
diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index b411a1f900..84a07971dc 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -127,6 +127,10 @@ struct CPURISCVState {
target_ulong mip;
+#ifdef TARGET_RISCV32
+ target_ulong *mstatush;
+#endif
+
uint32_t miclaim;
target_ulong mie;
@@ -153,6 +157,9 @@ struct CPURISCVState {
* required to handle the Hypervisor register swapping.
*/
target_ulong mstatus_novirt;
+#ifdef TARGET_RISCV32
+ target_ulong mstatush_novirt;
+#endif
/* Hypervisor CSRs */
target_ulong hstatus;
diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h
index a24654d137..049032f2ae 100644
--- a/target/riscv/cpu_bits.h
+++ b/target/riscv/cpu_bits.h
@@ -135,6 +135,9 @@
#define CSR_MTVEC 0x305
#define CSR_MCOUNTEREN 0x306
+/* 32-bit only */
+#define CSR_MSTATUSH 0x310
+
/* Legacy Counter Setup (priv v1.9.1) */
/* Update to #define CSR_MCOUNTINHIBIT 0x320 for 1.11.0 */
#define CSR_MUCOUNTEREN 0x320
diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c
index aa033b8590..c2ad0bbce7 100644
--- a/target/riscv/cpu_helper.c
+++ b/target/riscv/cpu_helper.c
@@ -938,10 +938,17 @@ void riscv_cpu_do_interrupt(CPUState *cs)
if (riscv_cpu_virt_enabled(env)) {
riscv_cpu_swap_hypervisor_regs(env);
}
+#ifdef TARGET_RISCV32
+ *env->mstatush = set_field(*env->mstatush, MSTATUS_MPV,
+ riscv_cpu_virt_enabled(env));
+ *env->mstatush = set_field(*env->mstatush, MSTATUS_MTL,
+ riscv_cpu_force_hs_excep_enabled(env));
+#else
*env->mstatus = set_field(*env->mstatus, MSTATUS_MPV,
riscv_cpu_virt_enabled(env));
*env->mstatus = set_field(*env->mstatus, MSTATUS_MTL,
riscv_cpu_force_hs_excep_enabled(env));
+#endif
mtval2 = env->guest_phys_fault_addr;
diff --git a/target/riscv/csr.c b/target/riscv/csr.c
index d028dfb60b..b28058f9d5 100644
--- a/target/riscv/csr.c
+++ b/target/riscv/csr.c
@@ -372,6 +372,27 @@ static int write_mstatus(CPURISCVState *env, int csrno,
target_ulong val)
return 0;
}
+#ifdef TARGET_RISCV32
+static int read_mstatush(CPURISCVState *env, int csrno, target_ulong *val)
+{
+ *val = *env->mstatush;
+ return 0;
+}
+
+static int write_mstatush(CPURISCVState *env, int csrno, target_ulong val)
+{
+ if ((val ^ *env->mstatush) & (MSTATUS_MPV)) {
+ tlb_flush(env_cpu(env));
+ }
+
+ val &= MSTATUS_MPV | MSTATUS_MTL;
+
+ *env->mstatush = val;
+
+ return 0;
+}
+#endif
+
static int read_misa(CPURISCVState *env, int csrno, target_ulong *val)
{
*val = env->misa;
@@ -1215,6 +1236,10 @@ static riscv_csr_operations csr_ops[CSR_TABLE_SIZE] = {
[CSR_MTVEC] = { any, read_mtvec, write_mtvec },
[CSR_MCOUNTEREN] = { any, read_mcounteren, write_mcounteren },
+#if defined(TARGET_RISCV32)
+ [CSR_MSTATUSH] = { any, read_mstatush, write_mstatush },
+#endif
+
/* Legacy Counter Setup (priv v1.9.1) */
[CSR_MUCOUNTEREN] = { any, read_mucounteren, write_mucounteren },
[CSR_MSCOUNTEREN] = { any, read_mscounteren, write_mscounteren },
diff --git a/target/riscv/op_helper.c b/target/riscv/op_helper.c
index e5128570e6..a0a631d722 100644
--- a/target/riscv/op_helper.c
+++ b/target/riscv/op_helper.c
@@ -153,7 +153,11 @@ target_ulong helper_mret(CPURISCVState *env, target_ulong
cpu_pc_deb)
get_field(mstatus, MSTATUS_MPIE));
mstatus = set_field(mstatus, MSTATUS_MPIE, 1);
mstatus = set_field(mstatus, MSTATUS_MPP, 0);
+#ifdef TARGET_RISCV32
+ *env->mstatush = set_field(*env->mstatush, MSTATUS_MPV, 0);
+#else
mstatus = set_field(mstatus, MSTATUS_MPV, 0);
+#endif
*env->mstatus = mstatus;
riscv_cpu_set_mode(env, prev_priv);
