Messages in this thread Patch in this message | | | Date | Thu, 10 Nov 2022 20:35:00 +0000 | Subject | [PATCH v2 1/5] x86/mm: Recompute physical address for every page of per-CPU CEA mapping | From | Sean Christopherson <> |
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Recompute the physical address for each per-CPU page in the CPU entry area, a recent commit inadvertantly modified cea_map_percpu_pages() such that every PTE is mapped to the physical address of the first page.
Fixes: 9fd429c28073 ("x86/kasan: Map shadow for percpu pages on demand") Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com> Signed-off-by: Sean Christopherson <seanjc@google.com> --- arch/x86/mm/cpu_entry_area.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/mm/cpu_entry_area.c b/arch/x86/mm/cpu_entry_area.c index dff9001e5e12..d831aae94b41 100644 --- a/arch/x86/mm/cpu_entry_area.c +++ b/arch/x86/mm/cpu_entry_area.c @@ -97,7 +97,7 @@ cea_map_percpu_pages(void *cea_vaddr, void *ptr, int pages, pgprot_t prot) early_pfn_to_nid(PFN_DOWN(pa))); for ( ; pages; pages--, cea_vaddr+= PAGE_SIZE, ptr += PAGE_SIZE) - cea_set_pte(cea_vaddr, pa, prot); + cea_set_pte(cea_vaddr, per_cpu_ptr_to_phys(ptr), prot); } static void __init percpu_setup_debug_store(unsigned int cpu) -- 2.38.1.431.g37b22c650d-goog
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