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ContiguousPTE[5/12] modify lookup_pte

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Change-Id: Ie5aa625e5a13596ff8294699d10114aeba9d991d
This commit is contained in:
TOIDA,Suguru
2018-11-30 09:18:10 +09:00
committed by Masamichi Takagi
parent 0449437c15
commit c4fbbb6027
1 changed files with 53 additions and 8 deletions
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61
arch/arm64/kernel/memory.c
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@ -2156,20 +2156,39 @@ static pte_t *lookup_pte(translation_table_t* tt, uintptr_t virt, int pgshift,
ptep = NULL;
if (!pgshift) {
pgshift = FIRST_LEVEL_BLOCK_SUPPORT ? PTL3_SHIFT : PTL2_SHIFT;
if (FIRST_LEVEL_BLOCK_SUPPORT) {
pgshift = PTL3_CONT_SHIFT;
} else {
pgshift = PTL2_CONT_SHIFT;
}
}
ptep = ptl4_offset(tt, virt);
if (ptl4_null(ptep)) {
if (pgshift > PTL3_SHIFT) {
if (pgshift >= PTL3_CONT_SHIFT) {
pgshift = PTL3_CONT_SHIFT;
} else if (pgshift > PTL3_SHIFT) {
pgshift = PTL3_SHIFT;
}
goto out;
}
ptep = ptl3_offset(ptep, virt);
if (ptl3_null(ptep) || ptl3_type_block(ptep)) {
if (pgshift >= PTL3_SHIFT) {
if (ptl3_null(ptep)) {
if (pgshift >= PTL3_CONT_SHIFT) {
pgshift = PTL3_CONT_SHIFT;
} else if (pgshift >= PTL3_SHIFT) {
pgshift = PTL3_SHIFT;
} else {
ptep = NULL;
}
goto out;
}
if (ptl3_type_block(ptep)) {
if (ptl3_is_contiguous(ptep) &&
pgshift >= PTL3_CONT_SHIFT) {
pgshift = PTL3_CONT_SHIFT;
} else if (pgshift >= PTL3_SHIFT) {
pgshift = PTL3_SHIFT;
} else {
ptep = NULL;
@ -2178,17 +2197,43 @@ static pte_t *lookup_pte(translation_table_t* tt, uintptr_t virt, int pgshift,
}
ptep = ptl2_offset(ptep, virt);
if (ptl2_null(ptep) || ptl2_type_block(ptep)) {
if (pgshift >= PTL2_SHIFT) {
if (ptl2_null(ptep)) {
if (pgshift >= PTL2_CONT_SHIFT) {
pgshift = PTL2_CONT_SHIFT;
} else if (pgshift >= PTL2_SHIFT) {
pgshift = PTL2_SHIFT;
} else {
ptep = NULL;;
ptep = NULL;
}
goto out;
}
if (ptl2_type_block(ptep)) {
if (ptl2_is_contiguous(ptep) &&
pgshift >= PTL2_CONT_SHIFT) {
pgshift = PTL2_CONT_SHIFT;
} else if (pgshift >= PTL2_SHIFT) {
pgshift = PTL2_SHIFT;
} else {
ptep = NULL;
}
goto out;
}
ptep = ptl1_offset(ptep, virt);
pgshift = PTL1_SHIFT;
if (ptl1_type_page(ptep)) {
if (ptl1_is_contiguous(ptep) &&
pgshift >= PTL1_CONT_SHIFT) {
pgshift = PTL1_CONT_SHIFT;
} else {
pgshift = PTL1_SHIFT;
}
goto out;
}
if (pgshift >= PTL1_CONT_SHIFT) {
pgshift = PTL1_CONT_SHIFT;
} else {
pgshift = PTL1_SHIFT;
}
out:
size = (size_t)1 << pgshift;