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target/riscv: Enable privileged spec version 1.12 

Virt machine uses privileged specification version 1.12 now.
All other machine continue to use the default one defined for that
machine unless changed to 1.12 by the user explicitly.

This commit enforces the privilege version for csrs introduced in
v1.12 or after.

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Atish Patra <atishp@rivosinc.com>
Message-Id: <20220303185440.512391-7-atishp@rivosinc.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Atish Patra 2022-03-03 10:54:40 -08:00 committed by Alistair Francis
parent 29a9ec9bd8
commit 7100fe6c24
2 changed files with 10 additions and 3 deletions
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8
target/riscv/cpu.c
View File

@ -150,7 +150,7 @@ static void riscv_any_cpu_init(Object *obj)
#elif defined(TARGET_RISCV64)
set_misa(env, MXL_RV64, RVI | RVM | RVA | RVF | RVD | RVC | RVU);
#endif
set_priv_version(env, PRIV_VERSION_1_11_0);
set_priv_version(env, PRIV_VERSION_1_12_0);
}
#if defined(TARGET_RISCV64)
@ -503,7 +503,9 @@ static void riscv_cpu_realize(DeviceState *dev, Error **errp)
}
if (cpu->cfg.priv_spec) {
if (!g_strcmp0(cpu->cfg.priv_spec, "v1.11.0")) {
if (!g_strcmp0(cpu->cfg.priv_spec, "v1.12.0")) {
priv_version = PRIV_VERSION_1_12_0;
} else if (!g_strcmp0(cpu->cfg.priv_spec, "v1.11.0")) {
priv_version = PRIV_VERSION_1_11_0;
} else if (!g_strcmp0(cpu->cfg.priv_spec, "v1.10.0")) {
priv_version = PRIV_VERSION_1_10_0;
@ -518,7 +520,7 @@ static void riscv_cpu_realize(DeviceState *dev, Error **errp)
if (priv_version) {
set_priv_version(env, priv_version);
} else if (!env->priv_ver) {
set_priv_version(env, PRIV_VERSION_1_11_0);
set_priv_version(env, PRIV_VERSION_1_12_0);
}
if (cpu->cfg.mmu) {

5
target/riscv/csr.c
View File

@ -2975,6 +2975,7 @@ static inline RISCVException riscv_csrrw_check(CPURISCVState *env,
{
/* check privileges and return RISCV_EXCP_ILLEGAL_INST if check fails */
int read_only = get_field(csrno, 0xC00) == 3;
int csr_min_priv = csr_ops[csrno].min_priv_ver;
#if !defined(CONFIG_USER_ONLY)
int effective_priv = env->priv;
@ -3007,6 +3008,10 @@ static inline RISCVException riscv_csrrw_check(CPURISCVState *env,
return RISCV_EXCP_ILLEGAL_INST;
}
if (env->priv_ver < csr_min_priv) {
return RISCV_EXCP_ILLEGAL_INST;
}
return csr_ops[csrno].predicate(env, csrno);
}