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authorSean Christopherson <seanjc@google.com>2022-11-10 23:35:00 +0300
committerDave Hansen <dave.hansen@linux.intel.com>2022-12-15 21:37:28 +0300
commit80d72a8f76e8f3f0b5a70b8c7022578e17bde8e7 (patch)
tree56b102ef662840436107b4ec770f17728e00ca4a /arch
parente996365ee7475805d2a01312532855004e89df84 (diff)
downloadlinux-80d72a8f76e8f3f0b5a70b8c7022578e17bde8e7.tar.xz
x86/mm: Recompute physical address for every page of per-CPU CEA mapping
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
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/mm/cpu_entry_area.c2
1 files changed, 1 insertions, 1 deletions
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)