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| author |   Michael Ellerman <mpe@ellerman.id.au> | 2022-07-09 19:29:34 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2022-07-09 19:29:34 +1000 |
| commit | 7e74dabc3daf0c217cb5e8e849a8f6c02927950f (patch) | |
| tree | 8620e5d95e732952473eeb764aee17693e4458bd /arch/powerpc/mm | |
| parent | powerpc: dts: Add DTS file for CZ.NIC Turris 1.x routers (diff) | |
| parent | powerpc/powernv: delay rng platform device creation until later in boot (diff) | |
| download | linux-dev-7e74dabc3daf0c217cb5e8e849a8f6c02927950f.tar.xz linux-dev-7e74dabc3daf0c217cb5e8e849a8f6c02927950f.zip | |
Merge branch 'fixes' into next
Merge our fixes branch. In particular this brings in commit
986481618023 ("powerpc/book3e: Fix PUD allocation size in
map_kernel_page()") which fixes a build failure in next, because commit
2db2008e6363 ("powerpc/64e: Rewrite p4d_populate() as a static inline
function") depends on it.
Diffstat (limited to 'arch/powerpc/mm')
| -rw-r--r-- | arch/powerpc/mm/mem.c | 33 | ||||
| -rw-r--r-- | arch/powerpc/mm/nohash/book3e_pgtable.c | 6 |
2 files changed, 35 insertions, 4 deletions
diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c index 2cf6748755e1..7b0d286bf9ba 100644 --- a/arch/powerpc/mm/mem.c +++ b/arch/powerpc/mm/mem.c @@ -106,6 +106,37 @@ void __ref arch_remove_linear_mapping(u64 start, u64 size) vm_unmap_aliases(); } +/* + * After memory hotplug the variables max_pfn, max_low_pfn and high_memory need + * updating. + */ +static void update_end_of_memory_vars(u64 start, u64 size) +{ + unsigned long end_pfn = PFN_UP(start + size); + + if (end_pfn > max_pfn) { + max_pfn = end_pfn; + max_low_pfn = end_pfn; + high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1; + } +} + +int __ref add_pages(int nid, unsigned long start_pfn, unsigned long nr_pages, + struct mhp_params *params) +{ + int ret; + + ret = __add_pages(nid, start_pfn, nr_pages, params); + if (ret) + return ret; + + /* update max_pfn, max_low_pfn and high_memory */ + update_end_of_memory_vars(start_pfn << PAGE_SHIFT, + nr_pages << PAGE_SHIFT); + + return ret; +} + int __ref arch_add_memory(int nid, u64 start, u64 size, struct mhp_params *params) { @@ -116,7 +147,7 @@ int __ref arch_add_memory(int nid, u64 start, u64 size, rc = arch_create_linear_mapping(nid, start, size, params); if (rc) return rc; - rc = __add_pages(nid, start_pfn, nr_pages, params); + rc = add_pages(nid, start_pfn, nr_pages, params); if (rc) arch_remove_linear_mapping(start, size); return rc; diff --git a/arch/powerpc/mm/nohash/book3e_pgtable.c b/arch/powerpc/mm/nohash/book3e_pgtable.c index 7d4368d055a6..b80fc4a91a53 100644 --- a/arch/powerpc/mm/nohash/book3e_pgtable.c +++ b/arch/powerpc/mm/nohash/book3e_pgtable.c @@ -96,8 +96,8 @@ int __ref map_kernel_page(unsigned long ea, unsigned long pa, pgprot_t prot) pgdp = pgd_offset_k(ea); p4dp = p4d_offset(pgdp, ea); if (p4d_none(*p4dp)) { - pmdp = early_alloc_pgtable(PMD_TABLE_SIZE); - p4d_populate(&init_mm, p4dp, pmdp); + pudp = early_alloc_pgtable(PUD_TABLE_SIZE); + p4d_populate(&init_mm, p4dp, pudp); } pudp = pud_offset(p4dp, ea); if (pud_none(*pudp)) { @@ -106,7 +106,7 @@ int __ref map_kernel_page(unsigned long ea, unsigned long pa, pgprot_t prot) } pmdp = pmd_offset(pudp, ea); if (!pmd_present(*pmdp)) { - ptep = early_alloc_pgtable(PAGE_SIZE); + ptep = early_alloc_pgtable(PTE_TABLE_SIZE); pmd_populate_kernel(&init_mm, pmdp, ptep); } ptep = pte_offset_kernel(pmdp, ea); |