From: Alexey Baturo <baturo.alexey@gmail.com>
Signed-off-by: Alexey Baturo <baturo.alexey@gmail.com>
---
target/riscv/cpu.h | 8 ++++++++
target/riscv/cpu_bits.h | 3 +++
target/riscv/cpu_cfg.h | 3 +++
target/riscv/csr.c | 11 +++++++++++
target/riscv/machine.c | 6 ++++--
target/riscv/pmp.c | 13 ++++++++++---
target/riscv/pmp.h | 11 ++++++-----
7 files changed, 45 insertions(+), 10 deletions(-)
diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index 73f7004936..bd379ee653 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -102,6 +102,14 @@ typedef enum {
EXT_STATUS_DIRTY,
} RISCVExtStatus;
+/* Enum holds PMM field values for Zjpm v0.8 extension */
+typedef enum {
+ PMM_FIELD_DISABLED = 0,
+ PMM_FIELD_RESERVED = 1,
+ PMM_FIELD_PMLEN7 = 2,
+ PMM_FIELD_PMLEN16 = 3,
+} RISCVPmPmm;
+
#define MMU_USER_IDX 3
#define MAX_RISCV_PMPS (16)
diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h
index 1c92458a01..7cf1049bf4 100644
--- a/target/riscv/cpu_bits.h
+++ b/target/riscv/cpu_bits.h
@@ -715,6 +715,7 @@ typedef enum RISCVException {
#define MENVCFG_CBIE (3UL << 4)
#define MENVCFG_CBCFE BIT(6)
#define MENVCFG_CBZE BIT(7)
+#define MENVCFG_PMM (3ULL << 32)
#define MENVCFG_ADUE (1ULL << 61)
#define MENVCFG_PBMTE (1ULL << 62)
#define MENVCFG_STCE (1ULL << 63)
@@ -728,11 +729,13 @@ typedef enum RISCVException {
#define SENVCFG_CBIE MENVCFG_CBIE
#define SENVCFG_CBCFE MENVCFG_CBCFE
#define SENVCFG_CBZE MENVCFG_CBZE
+#define SENVCFG_PMM MENVCFG_PMM
#define HENVCFG_FIOM MENVCFG_FIOM
#define HENVCFG_CBIE MENVCFG_CBIE
#define HENVCFG_CBCFE MENVCFG_CBCFE
#define HENVCFG_CBZE MENVCFG_CBZE
+#define HENVCFG_PMM MENVCFG_PMM
#define HENVCFG_ADUE MENVCFG_ADUE
#define HENVCFG_PBMTE MENVCFG_PBMTE
#define HENVCFG_STCE MENVCFG_STCE
diff --git a/target/riscv/cpu_cfg.h b/target/riscv/cpu_cfg.h
index f4605fb190..201f8af6ae 100644
--- a/target/riscv/cpu_cfg.h
+++ b/target/riscv/cpu_cfg.h
@@ -113,6 +113,9 @@ struct RISCVCPUConfig {
bool ext_ssaia;
bool ext_sscofpmf;
bool ext_smepmp;
+ bool ext_ssnpm;
+ bool ext_smnpm;
+ bool ext_smmpm;
bool rvv_ta_all_1s;
bool rvv_ma_all_1s;
diff --git a/target/riscv/csr.c b/target/riscv/csr.c
index ea4e1ac6ef..a67ba30494 100644
--- a/target/riscv/csr.c
+++ b/target/riscv/csr.c
@@ -527,6 +527,9 @@ static RISCVException have_mseccfg(CPURISCVState *env, int csrno)
if (riscv_cpu_cfg(env)->ext_zkr) {
return RISCV_EXCP_NONE;
}
+ if (riscv_cpu_cfg(env)->ext_smmpm) {
+ return RISCV_EXCP_NONE;
+ }
return RISCV_EXCP_ILLEGAL_INST;
}
@@ -2030,6 +2033,10 @@ static RISCVException write_menvcfg(CPURISCVState *env, int csrno,
(cfg->ext_sstc ? MENVCFG_STCE : 0) |
(cfg->ext_svadu ? MENVCFG_ADUE : 0);
}
+ /* Update PMM field only if the value is valid according to Zjpm v0.8 */
+ if (((val & MENVCFG_PMM) >> 32) != PMM_FIELD_RESERVED) {
+ mask |= MENVCFG_PMM;
+ }
env->menvcfg = (env->menvcfg & ~mask) | (val & mask);
return RISCV_EXCP_NONE;
@@ -2074,6 +2081,10 @@ static RISCVException write_senvcfg(CPURISCVState *env, int csrno,
target_ulong val)
{
uint64_t mask = SENVCFG_FIOM | SENVCFG_CBIE | SENVCFG_CBCFE | SENVCFG_CBZE;
+ /* Update PMM field only if the value is valid according to Zjpm v0.8 */
+ if (((val & SENVCFG_PMM) >> 32) != PMM_FIELD_RESERVED) {
+ mask |= SENVCFG_PMM;
+ }
RISCVException ret;
ret = smstateen_acc_ok(env, 0, SMSTATEEN0_HSENVCFG);
diff --git a/target/riscv/machine.c b/target/riscv/machine.c
index 860fe56d43..5e9c5b43ab 100644
--- a/target/riscv/machine.c
+++ b/target/riscv/machine.c
@@ -153,9 +153,8 @@ static const VMStateDescription vmstate_vector = {
static bool pointermasking_needed(void *opaque)
{
RISCVCPU *cpu = opaque;
- CPURISCVState *env = &cpu->env;
- return riscv_has_ext(env, RVJ);
+ return cpu->cfg.ext_ssnpm || cpu->cfg.ext_smnpm || cpu->cfg.ext_smmpm;
}
static const VMStateDescription vmstate_pointermasking = {
@@ -164,6 +163,9 @@ static const VMStateDescription vmstate_pointermasking = {
.minimum_version_id = 1,
.needed = pointermasking_needed,
.fields = (VMStateField[]) {
+ VMSTATE_UINTTL(env.mseccfg, RISCVCPU),
+ VMSTATE_UINTTL(env.senvcfg, RISCVCPU),
+ VMSTATE_UINTTL(env.menvcfg, RISCVCPU),
VMSTATE_END_OF_LIST()
}
};
diff --git a/target/riscv/pmp.c b/target/riscv/pmp.c
index 162e88a90a..893ccd58d8 100644
--- a/target/riscv/pmp.c
+++ b/target/riscv/pmp.c
@@ -576,6 +576,12 @@ target_ulong pmpaddr_csr_read(CPURISCVState *env, uint32_t addr_index)
void mseccfg_csr_write(CPURISCVState *env, target_ulong val)
{
int i;
+ uint64_t mask = MSECCFG_MMWP | MSECCFG_MML;
+
+ /* Update PMM field only if the value is valid according to Zjpm v0.8 */
+ if (((val & MSECCFG_PMM) >> 32) != PMM_FIELD_RESERVED) {
+ mask |= MSECCFG_PMM;
+ }
trace_mseccfg_csr_write(env->mhartid, val);
@@ -591,12 +597,13 @@ void mseccfg_csr_write(CPURISCVState *env, target_ulong val)
if (riscv_cpu_cfg(env)->ext_smepmp) {
/* Sticky bits */
- val |= (env->mseccfg & (MSECCFG_MMWP | MSECCFG_MML));
- if ((val ^ env->mseccfg) & (MSECCFG_MMWP | MSECCFG_MML)) {
+ val |= (env->mseccfg & mask);
+ if ((val ^ env->mseccfg) & mask) {
tlb_flush(env_cpu(env));
}
} else {
- val &= ~(MSECCFG_MMWP | MSECCFG_MML | MSECCFG_RLB);
+ mask |= MSECCFG_RLB;
+ val &= ~(mask);
}
env->mseccfg = val;
diff --git a/target/riscv/pmp.h b/target/riscv/pmp.h
index 9af8614cd4..b3ca51c26d 100644
--- a/target/riscv/pmp.h
+++ b/target/riscv/pmp.h
@@ -40,11 +40,12 @@ typedef enum {
} pmp_am_t;
typedef enum {
- MSECCFG_MML = 1 << 0,
- MSECCFG_MMWP = 1 << 1,
- MSECCFG_RLB = 1 << 2,
- MSECCFG_USEED = 1 << 8,
- MSECCFG_SSEED = 1 << 9
+ MSECCFG_MML = 1 << 0,
+ MSECCFG_MMWP = 1 << 1,
+ MSECCFG_RLB = 1 << 2,
+ MSECCFG_USEED = 1 << 8,
+ MSECCFG_SSEED = 1 << 9,
+ MSECCFG_PMM = 3UL << 32,
} mseccfg_field_t;
typedef struct {
--
2.34.1© 2016 - 2024 Red Hat, Inc.