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Ring3: Added EL0 support for ARM.

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This commit is contained in:
Mikhail Krichanov 2024-07-04 17:22:39 +03:00
parent 54d7a130ec
commit 618149a40d
2 changed files with 33 additions and 8 deletions
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17
ArmPkg/Library/ArmMmuLib/Arm/ArmMmuLibUpdate.c
View File

@ -142,10 +142,21 @@ UpdatePageEntries (
EntryValue |= TT_DESCRIPTOR_PAGE_AF;
}
if ((Attributes & EFI_MEMORY_RO) != 0) {
EntryValue |= TT_DESCRIPTOR_PAGE_AP_RO_RO;
if ((Attributes & EFI_MEMORY_USER) != 0) {
//
// TODO: Add PXN for Translation table descriptors.
//
if ((Attributes & EFI_MEMORY_RO) != 0) {
EntryValue |= TT_DESCRIPTOR_PAGE_AP_RO_RO;
} else {
EntryValue |= TT_DESCRIPTOR_PAGE_AP_RW_RW;
}
} else {
EntryValue |= TT_DESCRIPTOR_PAGE_AP_RW_RW;
if ((Attributes & EFI_MEMORY_RO) != 0) {
EntryValue |= TT_DESCRIPTOR_PAGE_AP_NO_RO;
} else {
EntryValue |= TT_DESCRIPTOR_PAGE_AP_NO_RW;
}
}
if ((Attributes & EFI_MEMORY_XP) != 0) {

24
ArmPkg/Library/CpuArchLib/Arm/Mmu.c
View File

@ -63,15 +63,18 @@ SectionToGcdAttributes (
// determine protection attributes
switch (SectionAttributes & TT_DESCRIPTOR_SECTION_AP_MASK) {
case TT_DESCRIPTOR_SECTION_AP_NO_RW:
break;
case TT_DESCRIPTOR_SECTION_AP_RW_RW:
// normal read/write access, do not add additional attributes
*GcdAttributes |= EFI_MEMORY_USER;
break;
// read only cases map to write-protect
case TT_DESCRIPTOR_SECTION_AP_NO_RO:
case TT_DESCRIPTOR_SECTION_AP_RO_RO:
*GcdAttributes |= EFI_MEMORY_RO;
break;
case TT_DESCRIPTOR_SECTION_AP_RO_RO:
*GcdAttributes |= EFI_MEMORY_USER | EFI_MEMORY_RO;
break;
}
// now process eXectue Never attribute
@ -468,10 +471,21 @@ EfiAttributeToArmAttribute (
}
// Determine protection attributes
if ((EfiAttributes & EFI_MEMORY_RO) != 0) {
ArmAttributes |= TT_DESCRIPTOR_SECTION_AP_RO_RO;
if ((EfiAttributes & EFI_MEMORY_USER) != 0) {
//
// TODO: Add PXN for Translation table descriptors.
//
if ((EfiAttributes & EFI_MEMORY_RO) != 0) {
ArmAttributes |= TT_DESCRIPTOR_SECTION_AP_RO_RO;
} else {
ArmAttributes |= TT_DESCRIPTOR_SECTION_AP_RW_RW;
}
} else {
ArmAttributes |= TT_DESCRIPTOR_SECTION_AP_RW_RW;
if ((EfiAttributes & EFI_MEMORY_RO) != 0) {
ArmAttributes |= TT_DESCRIPTOR_SECTION_AP_NO_RO;
} else {
ArmAttributes |= TT_DESCRIPTOR_SECTION_AP_NO_RW;
}
}
// Determine eXecute Never attribute