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target/riscv: Change the return type of pmp_hart_has_privs() to bool

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We no longer need the pmp_index for matched PMP entry now.

Signed-off-by: Weiwei Li <liweiwei@iscas.ac.cn>
Signed-off-by: Junqiang Wang <wangjunqiang@iscas.ac.cn>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20230517091519.34439-5-liweiwei@iscas.ac.cn>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Weiwei Li 2023-05-17 17:15:11 +08:00 committed by Alistair Francis
parent 093ce837e1
commit e9c39713ea
3 changed files with 21 additions and 27 deletions
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6
target/riscv/cpu_helper.c
View File

@ -697,16 +697,16 @@ static int get_physical_address_pmp(CPURISCVState *env, int *prot, hwaddr addr,
int mode)
{
pmp_priv_t pmp_priv;
int pmp_index = -1;
bool pmp_has_privs;
if (!riscv_cpu_cfg(env)->pmp) {
*prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
return TRANSLATE_SUCCESS;
}
pmp_index = pmp_hart_has_privs(env, addr, size, 1 << access_type,
pmp_has_privs = pmp_hart_has_privs(env, addr, size, 1 << access_type,
&pmp_priv, mode);
if (pmp_index < 0) {
if (!pmp_has_privs) {
*prot = 0;
return TRANSLATE_PMP_FAIL;
}

28
target/riscv/pmp.c
View File

@ -296,27 +296,23 @@ static bool pmp_hart_has_privs_default(CPURISCVState *env, target_ulong addr,
/*
* Check if the address has required RWX privs to complete desired operation
* Return PMP rule index if a pmp rule match
* Return MAX_RISCV_PMPS if default match
* Return negtive value if no match
* Return true if a pmp rule match or default match
* Return false if no match
*/
int pmp_hart_has_privs(CPURISCVState *env, target_ulong addr,
bool pmp_hart_has_privs(CPURISCVState *env, target_ulong addr,
target_ulong size, pmp_priv_t privs,
pmp_priv_t *allowed_privs, target_ulong mode)
{
int i = 0;
int ret = -1;
bool ret = false;
int pmp_size = 0;
target_ulong s = 0;
target_ulong e = 0;
/* Short cut if no rules */
if (0 == pmp_get_num_rules(env)) {
if (pmp_hart_has_privs_default(env, addr, size, privs,
allowed_privs, mode)) {
ret = MAX_RISCV_PMPS;
}
return ret;
return pmp_hart_has_privs_default(env, addr, size, privs,
allowed_privs, mode);
}
if (size == 0) {
@ -345,7 +341,7 @@ int pmp_hart_has_privs(CPURISCVState *env, target_ulong addr,
if ((s + e) == 1) {
qemu_log_mask(LOG_GUEST_ERROR,
"pmp violation - access is partially inside\n");
ret = -1;
ret = false;
break;
}
@ -453,17 +449,15 @@ int pmp_hart_has_privs(CPURISCVState *env, target_ulong addr,
* defined with PMP must be used. We shouldn't fallback on
* finding default privileges.
*/
ret = i;
ret = true;
break;
}
}
/* No rule matched */
if (ret == -1) {
if (pmp_hart_has_privs_default(env, addr, size, privs,
allowed_privs, mode)) {
ret = MAX_RISCV_PMPS;
}
if (!ret) {
ret = pmp_hart_has_privs_default(env, addr, size, privs,
allowed_privs, mode);
}
return ret;

2
target/riscv/pmp.h
View File

@ -72,7 +72,7 @@ target_ulong mseccfg_csr_read(CPURISCVState *env);
void pmpaddr_csr_write(CPURISCVState *env, uint32_t addr_index,
target_ulong val);
target_ulong pmpaddr_csr_read(CPURISCVState *env, uint32_t addr_index);
int pmp_hart_has_privs(CPURISCVState *env, target_ulong addr,
bool pmp_hart_has_privs(CPURISCVState *env, target_ulong addr,
target_ulong size, pmp_priv_t privs,
pmp_priv_t *allowed_privs,
target_ulong mode);