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memory: Initialize SPRR permissions

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Signed-off-by: Hector Martin <marcan@marcan.st>
This commit is contained in:
Hector Martin 2021-05-13 18:16:56 +09:00
parent 495732ef6a
commit b9ed00c6f3
1 changed files with 9 additions and 0 deletions
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9
src/memory.c
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@ -403,6 +403,14 @@ static void mmu_configure(void)
sysop("isb");
}
static void mmu_init_sprr(void)
{
msr_sync(SYS_IMP_APL_SPRR_CONFIG_EL1, 1);
msr_sync(SYS_IMP_APL_SPRR_PERM_EL0, SPRR_DEFAULT_PERM_EL0);
msr_sync(SYS_IMP_APL_SPRR_PERM_EL1, SPRR_DEFAULT_PERM_EL1);
msr_sync(SYS_IMP_APL_SPRR_CONFIG_EL1, 0);
}
void mmu_init(void)
{
printf("MMU: Initializing...\n");
@ -415,6 +423,7 @@ void mmu_init(void)
mmu_init_pagetables();
mmu_add_default_mappings();
mmu_configure();
mmu_init_sprr();
// Enable EL0 memory access by EL1
msr(PAN, 0);