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lib: utils: Disable appropriate IMSIC DT nodes in fdt_fixups()

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We should disable IMSIC DT nodes in fdt_fixups() which are not
accessible to the next booting stage based on currently assigned
domain.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
This commit is contained in:
Anup Patel
2021-06-15 11:19:40 +05:30
committed by Anup Patel
parent 811da5c541
commit 7127aaaaf7
2 changed files with 45 additions and 4 deletions
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32
lib/utils/fdt/fdt_fixup.c
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@@ -52,6 +52,34 @@ void fdt_cpu_fixup(void *fdt)
}
}
static void fdt_domain_based_fixup_one(void *fdt, int nodeoff)
{
int rc;
uint64_t reg_addr, reg_size;
struct sbi_domain *dom = sbi_domain_thishart_ptr();
rc = fdt_get_node_addr_size(fdt, nodeoff, 0, &reg_addr, &reg_size);
if (rc < 0 || !reg_addr || !reg_size)
return;
if (!sbi_domain_check_addr(dom, reg_addr, dom->next_mode,
SBI_DOMAIN_READ | SBI_DOMAIN_WRITE)) {
rc = fdt_open_into(fdt, fdt, fdt_totalsize(fdt) + 32);
if (rc < 0)
return;
fdt_setprop_string(fdt, nodeoff, "status", "disabled");
}
}
void fdt_imsic_fixup(void *fdt)
{
int noff = 0;
while ((noff = fdt_node_offset_by_compatible(fdt, noff,
"riscv,imsics")) >= 0)
fdt_domain_based_fixup_one(fdt, noff);
}
void fdt_plic_fixup(void *fdt)
{
u32 *cells;
@@ -261,10 +289,10 @@ int fdt_reserved_memory_nomap_fixup(void *fdt)
void fdt_fixups(void *fdt)
{
fdt_imsic_fixup(fdt);
fdt_plic_fixup(fdt);
fdt_reserved_memory_fixup(fdt);
fdt_pmu_fixup(fdt);
}