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lib: utils/sys: Add CLINT memregion in the root domain

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The CLINT memory should not be accessed by the supervisor-mode
software so let's protect it by adding CLINT memregion to the
root domain.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Xiang W <wxjstz@126.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Anup Patel
2021-04-09 18:09:06 +05:30
committed by Anup Patel
parent 4dc0001b09
commit 8b56980347
1 changed files with 27 additions and 2 deletions
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29
lib/utils/sys/clint.c
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@@ -10,13 +10,19 @@
#include <sbi/riscv_asm.h>
#include <sbi/riscv_atomic.h>
#include <sbi/riscv_io.h>
#include <sbi/sbi_domain.h>
#include <sbi/sbi_error.h>
#include <sbi/sbi_hartmask.h>
#include <sbi_utils/sys/clint.h>
#define CLINT_IPI_OFF 0
#define CLINT_IPI_SIZE 0x4000
#define CLINT_TIME_CMP_OFF 0x4000
#define CLINT_TIME_CMP_SIZE 0x4000
#define CLINT_TIME_VAL_OFF 0xbff8
#define CLINT_TIME_VAL_SIZE 0x4000
static struct clint_data *clint_ipi_hartid2data[SBI_HARTMASK_MAX_BITS];
@@ -59,6 +65,7 @@ int clint_warm_ipi_init(void)
int clint_cold_ipi_init(struct clint_data *clint)
{
u32 i;
struct sbi_domain_memregion reg;
if (!clint)
return SBI_EINVAL;
@@ -70,7 +77,11 @@ int clint_cold_ipi_init(struct clint_data *clint)
for (i = 0; i < clint->hart_count; i++)
clint_ipi_hartid2data[clint->first_hartid + i] = clint;
return 0;
/* Add CLINT ipi region to the root domain */
sbi_domain_memregion_init(clint->addr + CLINT_IPI_OFF,
CLINT_IPI_SIZE,
SBI_DOMAIN_MEMREGION_MMIO, &reg);
return sbi_domain_root_add_memregion(&reg);
}
static struct clint_data *clint_timer_hartid2data[SBI_HARTMASK_MAX_BITS];
@@ -174,6 +185,8 @@ int clint_cold_timer_init(struct clint_data *clint,
struct clint_data *reference)
{
u32 i;
int rc;
struct sbi_domain_memregion reg;
if (!clint)
return SBI_EINVAL;
@@ -199,5 +212,17 @@ int clint_cold_timer_init(struct clint_data *clint,
for (i = 0; i < clint->hart_count; i++)
clint_timer_hartid2data[clint->first_hartid + i] = clint;
return 0;
/* Add CLINT mtime region to the root domain */
sbi_domain_memregion_init(clint->addr + CLINT_TIME_VAL_OFF,
CLINT_TIME_VAL_SIZE,
SBI_DOMAIN_MEMREGION_MMIO, &reg);
rc = sbi_domain_root_add_memregion(&reg);
if (rc)
return rc;
/* Add CLINT timecmp region to the root domain */
sbi_domain_memregion_init(clint->addr + CLINT_TIME_CMP_OFF,
CLINT_TIME_CMP_SIZE,
SBI_DOMAIN_MEMREGION_MMIO, &reg);
return sbi_domain_root_add_memregion(&reg);
}