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x86/mm: Recompute physical address for every page of per-CPU CEA mapping

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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")
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Link: https://lkml.kernel.org/r/20221110203504.1985010-2-seanjc@google.com
This commit is contained in:
Sean Christopherson 2022-11-10 20:35:00 +00:00 committed by Dave Hansen
parent e996365ee7
commit 80d72a8f76
1 changed files with 1 additions and 1 deletions
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2
arch/x86/mm/cpu_entry_area.c
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@ -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)