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lib: utils: Copy over restricted root domain memregions to FDT domains

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We should copy over all restricted memregions from the root domain
to the domains populated from FDT. These restricted root memregions
are typically firmware memregion and M-mode only mmio memregions.

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 2021-04-10 09:37:23 +05:30 • committed by Anup Patel
parent fc37c9712d
commit e7e4bcd5b9
1 changed files with 22 additions and 4 deletions
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26
lib/utils/fdt/fdt_domain.c
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@ -222,7 +222,7 @@ static u32 fdt_domains_count;
static struct sbi_domain fdt_domains[FDT_DOMAIN_MAX_COUNT];
static struct sbi_hartmask fdt_masks[FDT_DOMAIN_MAX_COUNT];
static struct sbi_domain_memregion
fdt_regions[FDT_DOMAIN_MAX_COUNT][FDT_DOMAIN_REGION_MAX_COUNT + 2];
fdt_regions[FDT_DOMAIN_MAX_COUNT][FDT_DOMAIN_REGION_MAX_COUNT + 1];
static int __fdt_parse_region(void *fdt, int domain_offset,
int region_offset, u32 region_access,
@ -276,7 +276,7 @@ static int __fdt_parse_domain(void *fdt, int domain_offset, void *opaque)
struct sbi_hartmask *mask;
struct sbi_hartmask assign_mask;
int *cold_domain_offset = opaque;
struct sbi_domain_memregion *regions;
struct sbi_domain_memregion *reg, *regions;
int i, err, len, cpus_offset, cpu_offset, doffset;
/* Sanity check on maximum domains we can handle */
@ -314,13 +314,31 @@ static int __fdt_parse_domain(void *fdt, int domain_offset, void *opaque)
/* Setup memregions from DT */
val32 = 0;
sbi_memset(regions, 0,
sizeof(*regions) * (FDT_DOMAIN_REGION_MAX_COUNT + 2));
sizeof(*regions) * (FDT_DOMAIN_REGION_MAX_COUNT + 1));
dom->regions = regions;
err = fdt_iterate_each_memregion(fdt, domain_offset, &val32,
__fdt_parse_region);
if (err)
return err;
sbi_domain_memregion_initfw(&regions[val32]);
/*
* Copy over root domain memregions which don't allow
* read, write and execute from lower privilege modes.
*
* These root domain memregions without read, write,
* and execute permissions include:
* 1) firmware region protecting the firmware memory
* 2) mmio regions protecting M-mode only mmio devices
*/
sbi_domain_for_each_memregion(&root, reg) {
if ((reg->flags & SBI_DOMAIN_MEMREGION_READABLE) ||
(reg->flags & SBI_DOMAIN_MEMREGION_WRITEABLE) ||
(reg->flags & SBI_DOMAIN_MEMREGION_EXECUTABLE))
continue;
if (FDT_DOMAIN_REGION_MAX_COUNT <= val32)
return SBI_EINVAL;
sbi_memcpy(&regions[val32++], reg, sizeof(*reg));
}
/* Read "boot-hart" DT property */
val32 = -1U;