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Re: [PATCH v6 1/5] target/riscv: Add smstateen support
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From: |
Mayuresh Chitale |
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Subject: |
Re: [PATCH v6 1/5] target/riscv: Add smstateen support |
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Date: |
Thu, 28 Jul 2022 11:09:54 +0530 |
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User-agent: |
Evolution 3.36.5-0ubuntu1 |
On Mon, 2022-07-25 at 15:11 +0800, Weiwei Li wrote:
> 在 2022/7/24 下午11:39, Mayuresh Chitale 写道:
> > On Fri, 2022-07-22 at 08:31 +0800, Weiwei Li wrote:
> > > 在 2022/7/21 下午11:31, Mayuresh Chitale 写道:
> > > > Smstateen extension specifies a mechanism to close
> > > > the potential covert channels that could cause security issues.
> > > >
> > > > This patch adds the CSRs defined in the specification and
> > > > the corresponding predicates and read/write functions.
> > > >
> > > > Signed-off-by: Mayuresh Chitale <mchitale@ventanamicro.com>
> > > > ---
> > > > target/riscv/cpu.h | 4 +
> > > > target/riscv/cpu_bits.h | 37 ++++
> > > > target/riscv/csr.c | 370
> > > > ++++++++++++++++++++++++++++++++++++++++
> > > > target/riscv/machine.c | 21 +++
> > > > 4 files changed, 432 insertions(+)
> > > >
> > > > diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
> > > > index ffb1a18873..7f8e5b0014 100644
> > > > --- a/target/riscv/cpu.h
> > > > +++ b/target/riscv/cpu.h
> > > > @@ -354,6 +354,9 @@ struct CPUArchState {
> > > >
> > > > /* CSRs for execution enviornment configuration */
> > > > uint64_t menvcfg;
> > > > + uint64_t mstateen[SMSTATEEN_MAX_COUNT];
> > > > + uint64_t hstateen[SMSTATEEN_MAX_COUNT];
> > > > + uint64_t sstateen[SMSTATEEN_MAX_COUNT];
> > > > target_ulong senvcfg;
> > > > uint64_t henvcfg;
> > > > #endif
> > > > @@ -426,6 +429,7 @@ struct RISCVCPUConfig {
> > > > bool ext_zkt;
> > > > bool ext_ifencei;
> > > > bool ext_icsr;
> > > > + bool ext_smstateen;
> > > > bool ext_svinval;
> > > > bool ext_svnapot;
> > > > bool ext_svpbmt;
> > > > diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h
> > > > index 6be5a9e9f0..56b7c5bed6 100644
> > > > --- a/target/riscv/cpu_bits.h
> > > > +++ b/target/riscv/cpu_bits.h
> > > > @@ -199,6 +199,12 @@
> > > > /* Supervisor Configuration CSRs */
> > > > #define CSR_SENVCFG 0x10A
> > > >
> > > > +/* Supervisor state CSRs */
> > > > +#define CSR_SSTATEEN0 0x10C
> > > > +#define CSR_SSTATEEN1 0x10D
> > > > +#define CSR_SSTATEEN2 0x10E
> > > > +#define CSR_SSTATEEN3 0x10F
> > > > +
> > > > /* Supervisor Trap Handling */
> > > > #define CSR_SSCRATCH 0x140
> > > > #define CSR_SEPC 0x141
> > > > @@ -242,6 +248,16 @@
> > > > #define CSR_HENVCFG 0x60A
> > > > #define CSR_HENVCFGH 0x61A
> > > >
> > > > +/* Hypervisor state CSRs */
> > > > +#define CSR_HSTATEEN0 0x60C
> > > > +#define CSR_HSTATEEN0H 0x61C
> > > > +#define CSR_HSTATEEN1 0x60D
> > > > +#define CSR_HSTATEEN1H 0x61D
> > > > +#define CSR_HSTATEEN2 0x60E
> > > > +#define CSR_HSTATEEN2H 0x61E
> > > > +#define CSR_HSTATEEN3 0x60F
> > > > +#define CSR_HSTATEEN3H 0x61F
> > > > +
> > > > /* Virtual CSRs */
> > > > #define CSR_VSSTATUS 0x200
> > > > #define CSR_VSIE 0x204
> > > > @@ -283,6 +299,27 @@
> > > > #define CSR_MENVCFG 0x30A
> > > > #define CSR_MENVCFGH 0x31A
> > > >
> > > > +/* Machine state CSRs */
> > > > +#define CSR_MSTATEEN0 0x30C
> > > > +#define CSR_MSTATEEN0H 0x31C
> > > > +#define CSR_MSTATEEN1 0x30D
> > > > +#define CSR_MSTATEEN1H 0x31D
> > > > +#define CSR_MSTATEEN2 0x30E
> > > > +#define CSR_MSTATEEN2H 0x31E
> > > > +#define CSR_MSTATEEN3 0x30F
> > > > +#define CSR_MSTATEEN3H 0x31F
> > > > +
> > > > +/* Common defines for all smstateen */
> > > > +#define SMSTATEEN_MAX_COUNT 4
> > > > +#define SMSTATEEN0_CS (1ULL << 0)
> > > > +#define SMSTATEEN0_FCSR (1ULL << 1)
> > > > +#define SMSTATEEN0_HSCONTXT (1ULL << 57)
> > > > +#define SMSTATEEN0_IMSIC (1ULL << 58)
> > > > +#define SMSTATEEN0_AIA (1ULL << 59)
> > > > +#define SMSTATEEN0_SVSLCT (1ULL << 60)
> > > > +#define SMSTATEEN0_HSENVCFG (1ULL << 62)
> > > > +#define SMSTATEEN_STATEN (1ULL << 63)
> > > Maybe SMSTATEEN_STATEEN better.
> > ok. Will update in the next version.
> > > > +
> > > > /* Enhanced Physical Memory Protection (ePMP) */
> > > > #define CSR_MSECCFG 0x747
> > > > #define CSR_MSECCFGH 0x757
> > > > diff --git a/target/riscv/csr.c b/target/riscv/csr.c
> > > > index 235f2a011e..27032a416c 100644
> > > > --- a/target/riscv/csr.c
> > > > +++ b/target/riscv/csr.c
> > > > @@ -339,6 +339,68 @@ static RISCVException
> > > > hmode32(CPURISCVState
> > > > *env, int csrno)
> > > >
> > > > }
> > > >
> > > > +static RISCVException mstateen(CPURISCVState *env, int csrno)
> > > > +{
> > > > + CPUState *cs = env_cpu(env);
> > > > + RISCVCPU *cpu = RISCV_CPU(cs);
> > > > +
> > > > + if (!cpu->cfg.ext_smstateen) {
> > > > + return RISCV_EXCP_ILLEGAL_INST;
> > > > + }
> > > > +
> > > > + return any(env, csrno);
> > > > +}
> > > > +
> > > > +static RISCVException hstateen_pred(CPURISCVState *env, int
> > > > csrno,
> > > > int base)
> > > > +{
> > > > + CPUState *cs = env_cpu(env);
> > > > + RISCVCPU *cpu = RISCV_CPU(cs);
> > > > +
> > > > + if (!cpu->cfg.ext_smstateen) {
> > > > + return RISCV_EXCP_ILLEGAL_INST;
> > > > + }
> > > > +
> > > > + if (!(env->mstateen[csrno - base] & SMSTATEEN_STATEN)) {
> > > > + return RISCV_EXCP_ILLEGAL_INST;
> > > > + }
> > > > +
> > > > + return hmode(env, csrno);
> > > > +}
> > > > +
> > > > +static RISCVException hstateen(CPURISCVState *env, int csrno)
> > > > +{
> > > > + return hstateen_pred(env, csrno, CSR_HSTATEEN0);
> > > > +}
> > > > +
> > > > +static RISCVException hstateenh(CPURISCVState *env, int csrno)
> > > > +{
> > > > + return hstateen_pred(env, csrno, CSR_HSTATEEN0H);
> > > > +}
> > > > +
> > > > +static RISCVException sstateen(CPURISCVState *env, int csrno)
> > > > +{
> > > > + bool virt = riscv_cpu_virt_enabled(env);
> > > > + int index = csrno - CSR_SSTATEEN0;
> > > > + CPUState *cs = env_cpu(env);
> > > > + RISCVCPU *cpu = RISCV_CPU(cs);
> > > > +
> > > > + if (!cpu->cfg.ext_smstateen) {
> > > > + return RISCV_EXCP_ILLEGAL_INST;
> > > > + }
> > > > +
> > > > + if (!(env->mstateen[index] & SMSTATEEN_STATEN)) {
> > > > + return RISCV_EXCP_ILLEGAL_INST;
> > > > + }
> > > > +
> > > > + if (virt) {
> > > > + if (!(env->hstateen[index] & SMSTATEEN_STATEN)) {
> > > > + return RISCV_EXCP_VIRT_INSTRUCTION_FAULT;
> > > > + }
> > > > + }
> > > > +
> > > > + return smode(env, csrno);
> > > > +}
> > > > +
> > > > /* Checks if PointerMasking registers could be accessed */
> > > > static RISCVException pointer_masking(CPURISCVState *env,
> > > > int
> > > > csrno)
> > > > {
> > > > @@ -1699,6 +1761,263 @@ static RISCVException
> > > > write_henvcfgh(CPURISCVState *env, int csrno,
> > > > return RISCV_EXCP_NONE;
> > > > }
> > > >
> > > > +static inline void write_smstateen(CPURISCVState *env,
> > > > uint64_t
> > > > *reg,
> > > > + uint64_t wr_mask, uint64_t
> > > > new_val)
> > > > +{
> > > > + *reg = (*reg & ~wr_mask) | (new_val & wr_mask);
> > > > +}
> > > > +
> > > > +static RISCVException read_mstateen(CPURISCVState *env, int
> > > > csrno,
> > > > + target_ulong *val)
> > > > +{
> > > > + *val = env->mstateen[csrno - CSR_MSTATEEN0];
> > > > +
> > > > + return RISCV_EXCP_NONE;
> > > > +}
> > > > +
> > > > +static RISCVException write_mstateen(CPURISCVState *env, int
> > > > csrno,
> > > > + uint64_t wr_mask,
> > > > target_ulong new_val)
> > > > +{
> > > > + uint64_t *reg;
> > > > +
> > > > + reg = &env->mstateen[csrno - CSR_MSTATEEN0];
> > > > + write_smstateen(env, reg, wr_mask, new_val);
> > > > +
> > > > + return RISCV_EXCP_NONE;
> > > > +}
> > > > +
> > > > +static RISCVException write_mstateen0(CPURISCVState *env, int
> > > > csrno,
> > > > + target_ulong new_val)
> > > > +{
> > > > + uint64_t wr_mask = SMSTATEEN_STATEN;
> > > > +
> > > > + return write_mstateen(env, csrno, wr_mask, new_val);
> > > > +}
> > > > +
> > > > +static RISCVException write_mstateen1(CPURISCVState *env, int
> > > > csrno,
> > > > + target_ulong new_val)
> > > > +{
> > > > + return write_mstateen(env, csrno, SMSTATEEN_STATEN,
> > > > new_val);
> > > > +}
> > > > +
> > > > +static RISCVException write_mstateen2(CPURISCVState *env, int
> > > > csrno,
> > > > + target_ulong new_val)
> > > > +{
> > > > + return write_mstateen(env, csrno, SMSTATEEN_STATEN,
> > > > new_val);
> > > > +}
> > > > +
> > > > +static RISCVException write_mstateen3(CPURISCVState *env, int
> > > > csrno,
> > > > + target_ulong new_val)
> > > > +{
> > > > + return write_mstateen(env, csrno, SMSTATEEN_STATEN,
> > > > new_val);
> > > > +}
> > > > +
> > > Mstateen1~3 can share the same write function currently. The
> > > same
> > > to
> > > h/sstateen1~3.
> > I think its better to keep them separate as it will anyway be
> > required
> > once they are defined.
>
> Only a few bits in mstateen0 is used currently. It may need a long
> time
> before mstateen1~3 to be used.
>
> And it's very easy to separate it out if required. So it seems
> unnecessary to copy two times to prepare
>
> for future use currently.
>
I think its better to separate now and then modify the functions for
mstateen1-3 as and when required.
> Regards,
>
> Weiwei Li
>
> > > > +static RISCVException read_mstateenh(CPURISCVState *env, int
> > > > csrno,
> > > > + target_ulong *val)
> > > > +{
> > > > + *val = env->mstateen[csrno - CSR_MSTATEEN0H] >> 32;
> > > > +
> > > > + return RISCV_EXCP_NONE;
> > > > +}
> > > > +
> > > > +static RISCVException write_mstateenh(CPURISCVState *env, int
> > > > csrno,
> > > > + uint64_t wr_mask,
> > > > target_ulong new_val)
> > > > +{
> > > > + uint64_t *reg, val;
> > > > +
> > > > + reg = &env->mstateen[csrno - CSR_MSTATEEN0H];
> > > > + val = (uint64_t)new_val << 32;
> > > > + val |= *reg & 0xFFFFFFFF;
> > > > + write_smstateen(env, reg, wr_mask, val);
> > > > +
> > > > + return RISCV_EXCP_NONE;
> > > > +}
> > > > +
> > > > +static RISCVException write_mstateen0h(CPURISCVState *env, int
> > > > csrno,
> > > > + target_ulong new_val)
> > > > +{
> > > > + uint64_t wr_mask = SMSTATEEN_STATEN;
> > > > +
> > > > + return write_mstateenh(env, csrno, wr_mask, new_val);
> > > > +}
> > > > +
> > > > +static RISCVException write_mstateen1h(CPURISCVState *env, int
> > > > csrno,
> > > > + target_ulong new_val)
> > > > +{
> > > > + return write_mstateenh(env, csrno, SMSTATEEN_STATEN,
> > > > new_val);
> > > > +}
> > > > +
> > > > +static RISCVException write_mstateen2h(CPURISCVState *env, int
> > > > csrno,
> > > > + target_ulong new_val)
> > > > +{
> > > > + return write_mstateenh(env, csrno, SMSTATEEN_STATEN,
> > > > new_val);
> > > > +}
> > > > +
> > > > +static RISCVException write_mstateen3h(CPURISCVState *env, int
> > > > csrno,
> > > > + target_ulong new_val)
> > > > +{
> > > > + return write_mstateenh(env, csrno, SMSTATEEN_STATEN,
> > > > new_val);
> > > > +}
> > > > +
> > > > +static RISCVException read_hstateen(CPURISCVState *env, int
> > > > csrno,
> > > > + target_ulong *val)
> > > > +{
> > > > + int index = csrno - CSR_HSTATEEN0;
> > > > +
> > > > + *val = env->hstateen[index] & env->mstateen[index];
> > > > +
> > > > + return RISCV_EXCP_NONE;
> > > > +}
> > > > +
> > > > +static RISCVException write_hstateen(CPURISCVState *env, int
> > > > csrno,
> > > > + uint64_t mask,
> > > > target_ulong
> > > > new_val)
> > > > +{
> > > > + int index = csrno - CSR_HSTATEEN0;
> > > > + uint64_t *reg, wr_mask;
> > > > +
> > > > + reg = &env->hstateen[index];
> > > > + wr_mask = env->mstateen[index] & mask;
> > > > + write_smstateen(env, reg, wr_mask, new_val);
> > > > +
> > > > + return RISCV_EXCP_NONE;
> > > > +}
> > > > +
> > > > +static RISCVException write_hstateen0(CPURISCVState *env, int
> > > > csrno,
> > > > + target_ulong new_val)
> > > > +{
> > > > + uint64_t wr_mask = SMSTATEEN_STATEN;
> > > > +
> > > > + return write_hstateen(env, csrno, wr_mask, new_val);
> > > > +}
> > > > +
> > > > +static RISCVException write_hstateen1(CPURISCVState *env, int
> > > > csrno,
> > > > + target_ulong new_val)
> > > > +{
> > > > + return write_hstateen(env, csrno, SMSTATEEN_STATEN,
> > > > new_val);
> > > > +}
> > > > +
> > > > +static RISCVException write_hstateen2(CPURISCVState *env, int
> > > > csrno,
> > > > + target_ulong new_val)
> > > > +{
> > > > + return write_hstateen(env, csrno, SMSTATEEN_STATEN,
> > > > new_val);
> > > > +}
> > > > +
> > > > +static RISCVException write_hstateen3(CPURISCVState *env, int
> > > > csrno,
> > > > + target_ulong new_val)
> > > > +{
> > > > + return write_hstateen(env, csrno, SMSTATEEN_STATEN,
> > > > new_val);
> > > > +}
> > > > +
> > > > +static RISCVException read_hstateenh(CPURISCVState *env, int
> > > > csrno,
> > > > + target_ulong *val)
> > > > +{
> > > > + int index = csrno - CSR_HSTATEEN0H;
> > > > +
> > > > + *val = (env->hstateen[index] >> 32) & (env-
> > > > >mstateen[index] >>
> > > > 32);
> > > > +
> > > > + return RISCV_EXCP_NONE;
> > > > +}
> > > > +
> > > > +static RISCVException write_hstateenh(CPURISCVState *env, int
> > > > csrno,
> > > > + uint64_t mask,
> > > > target_ulong
> > > > new_val)
> > > > +{
> > > > + int index = csrno - CSR_HSTATEEN0H;
> > > > + uint64_t *reg, wr_mask, val;
> > > > +
> > > > + reg = &env->hstateen[index];
> > > > + val = (uint64_t)new_val << 32;
> > > > + val |= *reg & 0xFFFFFFFF;
> > > > + wr_mask = env->mstateen[index] & mask;
> > > > + write_smstateen(env, reg, wr_mask, val);
> > > > +
> > > > + return RISCV_EXCP_NONE;
> > > > +}
> > > > +
> > > > +static RISCVException write_hstateen0h(CPURISCVState *env, int
> > > > csrno,
> > > > + target_ulong new_val)
> > > > +{
> > > > + uint64_t wr_mask = SMSTATEEN_STATEN;
> > > > +
> > > > + return write_hstateenh(env, csrno, wr_mask, new_val);
> > > > +}
> > > > +
> > > > +static RISCVException write_hstateen1h(CPURISCVState *env, int
> > > > csrno,
> > > > + target_ulong new_val)
> > > > +{
> > > > + return write_hstateenh(env, csrno, SMSTATEEN_STATEN,
> > > > new_val);
> > > > +}
> > > > +
> > > > +static RISCVException write_hstateen2h(CPURISCVState *env, int
> > > > csrno,
> > > > + target_ulong new_val)
> > > > +{
> > > > + return write_hstateenh(env, csrno, SMSTATEEN_STATEN,
> > > > new_val);
> > > > +}
> > > > +
> > > > +static RISCVException write_hstateen3h(CPURISCVState *env, int
> > > > csrno,
> > > > + target_ulong new_val)
> > > > +{
> > > > + return write_hstateenh(env, csrno, SMSTATEEN_STATEN,
> > > > new_val);
> > > > +}
> > > > +
> > > > +static RISCVException read_sstateen(CPURISCVState *env, int
> > > > csrno,
> > > > + target_ulong *val)
> > > > +{
> > > > + bool virt = riscv_cpu_virt_enabled(env);
> > > > + int index = csrno - CSR_SSTATEEN0;
> > > > +
> > > > + *val = env->sstateen[index] & env->mstateen[index];
> > > > + if (virt) {
> > > > + *val &= env->hstateen[index];
> > > > + }
> > > > +
> > > > + return RISCV_EXCP_NONE;
> > > > +}
> > > > +
> > > > +static RISCVException write_sstateen(CPURISCVState *env, int
> > > > csrno,
> > > > + uint64_t mask,
> > > > target_ulong
> > > > new_val)
> > > > +{
> > > > + bool virt = riscv_cpu_virt_enabled(env);
> > > > + int index = csrno - CSR_SSTATEEN0;
> > > > + uint64_t wr_mask;
> > > > + uint64_t *reg;
> > > > +
> > > > + wr_mask = env->mstateen[index] & mask;
> > > > + if (virt) {
> > > > + wr_mask &= env->hstateen[index];
> > > > + }
> > > > +
> > > > + reg = &env->sstateen[index];
> > > > + write_smstateen(env, reg, wr_mask, new_val);
> > > > +
> > > > + return RISCV_EXCP_NONE;
> > > > +}
> > > > +
> > > > +static RISCVException write_sstateen0(CPURISCVState *env, int
> > > > csrno,
> > > > + target_ulong new_val)
> > > > +{
> > > > + uint64_t wr_mask = SMSTATEEN_STATEN;
> > > > +
> > > > + return write_sstateen(env, csrno, wr_mask, new_val);
> > > > +}
> > > > +
> > > > +static RISCVException write_sstateen1(CPURISCVState *env, int
> > > > csrno,
> > > > + target_ulong new_val)
> > > > +{
> > > > + return write_sstateen(env, csrno, SMSTATEEN_STATEN,
> > > > new_val);
> > > > +}
> > > > +
> > > > +static RISCVException write_sstateen2(CPURISCVState *env, int
> > > > csrno,
> > > > + target_ulong new_val)
> > > > +{
> > > > + return write_sstateen(env, csrno, SMSTATEEN_STATEN,
> > > > new_val);
> > > > +}
> > > > +
> > > > +static RISCVException write_sstateen3(CPURISCVState *env, int
> > > > csrno,
> > > > + target_ulong new_val)
> > > > +{
> > > > + return write_sstateen(env, csrno, SMSTATEEN_STATEN,
> > > > new_val);
> > > > +}
> > > > +
> > > > static RISCVException rmw_mip64(CPURISCVState *env, int
> > > > csrno,
> > > > uint64_t *ret_val,
> > > > uint64_t new_val, uint64_t
> > > > wr_mask)
> > > > @@ -3558,6 +3877,57 @@ riscv_csr_operations
> > > > csr_ops[CSR_TABLE_SIZE]
> > > > = {
> > > > [CSR_HENVCFGH] = { "henvcfgh", hmode32, read_henvcfgh,
> > > > write_henvcfgh,
> > > > .min_priv_ver =
> > > > PRIV_VERSION_1_12_0 },
> > > >
> > > > + /* Smstateen extension CSRs */
> > > > + [CSR_MSTATEEN0] = { "mstateen0", mstateen, read_mstateen,
> > > > write_mstateen0,
> > > > + .min_priv_ver = PRIV_VERSION_1_12_0
> > > > },
> > > The new lines have been updated to align with the last line in my
> > > previous patchset(accepted).
> > >
> > > So it's better to make ' . ' align with ' " '.
> > ok. Will update in the next version.
> > > Regards,
> > >
> > > Weiwei Li
> > >
> > > > + [CSR_MSTATEEN0H] = { "mstateen0h", mstateen,
> > > > read_mstateenh,
> > > > + write_mstateen0h,
> > > > + .min_priv_ver = PRIV_VERSION_1_12_0
> > > > },
> > > > + [CSR_MSTATEEN1] = { "mstateen1", mstateen, read_mstateen,
> > > > write_mstateen1,
> > > > + .min_priv_ver = PRIV_VERSION_1_12_0
> > > > },
> > > > + [CSR_MSTATEEN1H] = { "mstateen1h", mstateen,
> > > > read_mstateenh,
> > > > + write_mstateen1h,
> > > > + .min_priv_ver = PRIV_VERSION_1_12_0
> > > > },
> > > > + [CSR_MSTATEEN2] = { "mstateen2", mstateen, read_mstateen,
> > > > write_mstateen2,
> > > > + .min_priv_ver = PRIV_VERSION_1_12_0
> > > > },
> > > > + [CSR_MSTATEEN2H] = { "mstateen2h", mstateen,
> > > > read_mstateenh,
> > > > + write_mstateen2h,
> > > > + .min_priv_ver = PRIV_VERSION_1_12_0
> > > > },
> > > > + [CSR_MSTATEEN3] = { "mstateen3", mstateen, read_mstateen,
> > > > write_mstateen3,
> > > > + .min_priv_ver = PRIV_VERSION_1_12_0
> > > > },
> > > > + [CSR_MSTATEEN3H] = { "mstateen3h", mstateen,
> > > > read_mstateenh,
> > > > + write_mstateen3h,
> > > > + .min_priv_ver = PRIV_VERSION_1_12_0
> > > > },
> > > > +
> > > > + [CSR_HSTATEEN0] = { "hstateen0", hstateen, read_hstateen,
> > > > write_hstateen0,
> > > > + .min_priv_ver = PRIV_VERSION_1_12_0
> > > > },
> > > > + [CSR_HSTATEEN0H] = { "hstateen0h", hstateenh,
> > > > read_hstateenh,
> > > > + write_hstateen0h,
> > > > + .min_priv_ver = PRIV_VERSION_1_12_0
> > > > },
> > > > + [CSR_HSTATEEN1] = { "hstateen1", hstateen, read_hstateen,
> > > > write_hstateen1,
> > > > + .min_priv_ver = PRIV_VERSION_1_12_0
> > > > },
> > > > + [CSR_HSTATEEN1H] = { "hstateen1h", hstateenh,
> > > > read_hstateenh,
> > > > + write_hstateen1h,
> > > > + .min_priv_ver = PRIV_VERSION_1_12_0
> > > > },
> > > > + [CSR_HSTATEEN2] = { "hstateen2", hstateen, read_hstateen,
> > > > write_hstateen2,
> > > > + .min_priv_ver = PRIV_VERSION_1_12_0
> > > > },
> > > > + [CSR_HSTATEEN2H] = { "hstateen2h", hstateenh,
> > > > read_hstateenh,
> > > > + write_hstateen2h,
> > > > + .min_priv_ver = PRIV_VERSION_1_12_0
> > > > },
> > > > + [CSR_HSTATEEN3] = { "hstateen3", hstateen, read_hstateen,
> > > > write_hstateen3,
> > > > + .min_priv_ver = PRIV_VERSION_1_12_0
> > > > },
> > > > + [CSR_HSTATEEN3H] = { "hstateen3h", hstateenh,
> > > > read_hstateenh,
> > > > + write_hstateen3h,
> > > > + .min_priv_ver = PRIV_VERSION_1_12_0
> > > > },
> > > > +
> > > > + [CSR_SSTATEEN0] = { "sstateen0", sstateen, read_sstateen,
> > > > write_sstateen0,
> > > > + .min_priv_ver = PRIV_VERSION_1_12_0
> > > > },
> > > > + [CSR_SSTATEEN1] = { "sstateen1", sstateen, read_sstateen,
> > > > write_sstateen1,
> > > > + .min_priv_ver = PRIV_VERSION_1_12_0
> > > > },
> > > > + [CSR_SSTATEEN2] = { "sstateen2", sstateen, read_sstateen,
> > > > write_sstateen2,
> > > > + .min_priv_ver = PRIV_VERSION_1_12_0
> > > > },
> > > > + [CSR_SSTATEEN3] = { "sstateen3", sstateen, read_sstateen,
> > > > write_sstateen3,
> > > > + .min_priv_ver = PRIV_VERSION_1_12_0
> > > > },
> > > > /* Supervisor Trap Setup */
> > > > [CSR_SSTATUS] = { "sstatus", smode,
> > > > read_sstatus, write_sstatus, NULL,
> > > > read_sstatus_i
> > > > 128
> > > > },
> > > > diff --git a/target/riscv/machine.c b/target/riscv/machine.c
> > > > index dc182ca811..ef418ac19d 100644
> > > > --- a/target/riscv/machine.c
> > > > +++ b/target/riscv/machine.c
> > > > @@ -262,6 +262,26 @@ static int riscv_cpu_post_load(void
> > > > *opaque,
> > > > int version_id)
> > > > return 0;
> > > > }
> > > >
> > > > +static bool smstateen_needed(void *opaque)
> > > > +{
> > > > + RISCVCPU *cpu = opaque;
> > > > +
> > > > + return cpu->cfg.ext_smstateen;
> > > > +}
> > > > +
> > > > +static const VMStateDescription vmstate_smstateen = {
> > > > + .name = "cpu/smtateen",
> > > > + .version_id = 1,
> > > > + .minimum_version_id = 1,
> > > > + .needed = smstateen_needed,
> > > > + .fields = (VMStateField[]) {
> > > > + VMSTATE_UINT64_ARRAY(env.mstateen, RISCVCPU, 4),
> > > > + VMSTATE_UINT64_ARRAY(env.hstateen, RISCVCPU, 4),
> > > > + VMSTATE_UINT64_ARRAY(env.sstateen, RISCVCPU, 4),
> > > > + VMSTATE_END_OF_LIST()
> > > > + }
> > > > +};
> > > > +
> > > > static bool envcfg_needed(void *opaque)
> > > > {
> > > > RISCVCPU *cpu = opaque;
> > > > @@ -372,6 +392,7 @@ const VMStateDescription vmstate_riscv_cpu
> > > > = {
> > > > &vmstate_kvmtimer,
> > > > &vmstate_envcfg,
> > > > &vmstate_debug,
> > > > + &vmstate_smstateen,
> > > > NULL
> > > > }
> > > > };
[PATCH v6 2/5] target/riscv: smstateen check for h/senvcfg, Mayuresh Chitale, 2022/07/21
[PATCH v6 3/5] target/riscv: smstateen check for fcsr, Mayuresh Chitale, 2022/07/21