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Diffstat (limited to 'arch/powerpc/mm/pgtable-radix.c')
-rw-r--r--arch/powerpc/mm/pgtable-radix.c79
1 files changed, 16 insertions, 63 deletions
diff --git a/arch/powerpc/mm/pgtable-radix.c b/arch/powerpc/mm/pgtable-radix.c
index 96f68c5aa1f5..7be99fd9af15 100644
--- a/arch/powerpc/mm/pgtable-radix.c
+++ b/arch/powerpc/mm/pgtable-radix.c
@@ -226,16 +226,6 @@ void radix__mark_rodata_ro(void)
{
unsigned long start, end;
- /*
- * mark_rodata_ro() will mark itself as !writable at some point.
- * Due to DD1 workaround in radix__pte_update(), we'll end up with
- * an invalid pte and the system will crash quite severly.
- */
- if (cpu_has_feature(CPU_FTR_POWER9_DD1)) {
- pr_warn("Warning: Unable to mark rodata read only on P9 DD1\n");
- return;
- }
-
start = (unsigned long)_stext;
end = (unsigned long)__init_begin;
@@ -277,6 +267,7 @@ static int __meminit create_physical_mapping(unsigned long start,
#else
int split_text_mapping = 0;
#endif
+ int psize;
start = _ALIGN_UP(start, PAGE_SIZE);
for (addr = start; addr < end; addr += mapping_size) {
@@ -290,13 +281,17 @@ static int __meminit create_physical_mapping(unsigned long start,
retry:
if (IS_ALIGNED(addr, PUD_SIZE) && gap >= PUD_SIZE &&
mmu_psize_defs[MMU_PAGE_1G].shift &&
- PUD_SIZE <= max_mapping_size)
+ PUD_SIZE <= max_mapping_size) {
mapping_size = PUD_SIZE;
- else if (IS_ALIGNED(addr, PMD_SIZE) && gap >= PMD_SIZE &&
- mmu_psize_defs[MMU_PAGE_2M].shift)
+ psize = MMU_PAGE_1G;
+ } else if (IS_ALIGNED(addr, PMD_SIZE) && gap >= PMD_SIZE &&
+ mmu_psize_defs[MMU_PAGE_2M].shift) {
mapping_size = PMD_SIZE;
- else
+ psize = MMU_PAGE_2M;
+ } else {
mapping_size = PAGE_SIZE;
+ psize = mmu_virtual_psize;
+ }
if (split_text_mapping && (mapping_size == PUD_SIZE) &&
(addr <= __pa_symbol(__init_begin)) &&
@@ -307,8 +302,10 @@ retry:
if (split_text_mapping && (mapping_size == PMD_SIZE) &&
(addr <= __pa_symbol(__init_begin)) &&
- (addr + mapping_size) >= __pa_symbol(_stext))
+ (addr + mapping_size) >= __pa_symbol(_stext)) {
mapping_size = PAGE_SIZE;
+ psize = mmu_virtual_psize;
+ }
if (mapping_size != previous_size) {
print_mapping(start, addr, previous_size);
@@ -326,6 +323,8 @@ retry:
rc = __map_kernel_page(vaddr, addr, prot, mapping_size, nid, start, end);
if (rc)
return rc;
+
+ update_page_count(psize, 1);
}
print_mapping(start, addr, mapping_size);
@@ -533,35 +532,6 @@ found:
return;
}
-static void update_hid_for_radix(void)
-{
- unsigned long hid0;
- unsigned long rb = 3UL << PPC_BITLSHIFT(53); /* IS = 3 */
-
- asm volatile("ptesync": : :"memory");
- /* prs = 0, ric = 2, rs = 0, r = 1 is = 3 */
- asm volatile(PPC_TLBIE_5(%0, %4, %3, %2, %1)
- : : "r"(rb), "i"(1), "i"(0), "i"(2), "r"(0) : "memory");
- /* prs = 1, ric = 2, rs = 0, r = 1 is = 3 */
- asm volatile(PPC_TLBIE_5(%0, %4, %3, %2, %1)
- : : "r"(rb), "i"(1), "i"(1), "i"(2), "r"(0) : "memory");
- asm volatile("eieio; tlbsync; ptesync; isync; slbia": : :"memory");
- trace_tlbie(0, 0, rb, 0, 2, 0, 1);
- trace_tlbie(0, 0, rb, 0, 2, 1, 1);
-
- /*
- * now switch the HID
- */
- hid0 = mfspr(SPRN_HID0);
- hid0 |= HID0_POWER9_RADIX;
- mtspr(SPRN_HID0, hid0);
- asm volatile("isync": : :"memory");
-
- /* Wait for it to happen */
- while (!(mfspr(SPRN_HID0) & HID0_POWER9_RADIX))
- cpu_relax();
-}
-
static void radix_init_amor(void)
{
/*
@@ -576,22 +546,12 @@ static void radix_init_amor(void)
static void radix_init_iamr(void)
{
- unsigned long iamr;
-
- /*
- * The IAMR should set to 0 on DD1.
- */
- if (cpu_has_feature(CPU_FTR_POWER9_DD1))
- iamr = 0;
- else
- iamr = (1ul << 62);
-
/*
* Radix always uses key0 of the IAMR to determine if an access is
* allowed. We set bit 0 (IBM bit 1) of key0, to prevent instruction
* fetch.
*/
- mtspr(SPRN_IAMR, iamr);
+ mtspr(SPRN_IAMR, (1ul << 62));
}
void __init radix__early_init_mmu(void)
@@ -644,8 +604,6 @@ void __init radix__early_init_mmu(void)
if (!firmware_has_feature(FW_FEATURE_LPAR)) {
radix_init_native();
- if (cpu_has_feature(CPU_FTR_POWER9_DD1))
- update_hid_for_radix();
lpcr = mfspr(SPRN_LPCR);
mtspr(SPRN_LPCR, lpcr | LPCR_UPRT | LPCR_HR);
radix_init_partition_table();
@@ -671,10 +629,6 @@ void radix__early_init_mmu_secondary(void)
* update partition table control register and UPRT
*/
if (!firmware_has_feature(FW_FEATURE_LPAR)) {
-
- if (cpu_has_feature(CPU_FTR_POWER9_DD1))
- update_hid_for_radix();
-
lpcr = mfspr(SPRN_LPCR);
mtspr(SPRN_LPCR, lpcr | LPCR_UPRT | LPCR_HR);
@@ -1095,8 +1049,7 @@ void radix__ptep_set_access_flags(struct vm_area_struct *vma, pte_t *ptep,
* To avoid NMMU hang while relaxing access, we need mark
* the pte invalid in between.
*/
- if (cpu_has_feature(CPU_FTR_POWER9_DD1) ||
- atomic_read(&mm->context.copros) > 0) {
+ if (atomic_read(&mm->context.copros) > 0) {
unsigned long old_pte, new_pte;
old_pte = __radix_pte_update(ptep, ~0, 0);