x86: pgtable: convert __tlb_remove_table() to use struct ptdesc

Convert __tlb_remove_table() to use struct ptdesc, which will help to move
pagetable_dtor() to __tlb_remove_table().

And page tables shouldn't have swap cache, so use pagetable_free() instead
of free_page_and_swap_cache() to free page table pages.

Link: https://lkml.kernel.org/r/39f60f93143ff77cf5d6b3c3e75af0ffc1480adb.1736317725.git.zhengqi.arch@bytedance.com
Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com>
Reviewed-by: Kevin Brodsky <kevin.brodsky@arm.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Alexandre Ghiti <alex@ghiti.fr>
Cc: Alexandre Ghiti <alexghiti@rivosinc.com>
Cc: Andreas Larsson <andreas@gaisler.com>
Cc: Aneesh Kumar K.V (Arm) <aneesh.kumar@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Jann Horn <jannh@google.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Mike Rapoport (Microsoft) <rppt@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yu Zhao <yuzhao@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/arch/x86/include/asm/tlb.h b/arch/x86/include/asm/tlb.h
index 73f0786..680ec3d 100644 (file)
--- a/arch/x86/include/asm/tlb.h
+++ b/arch/x86/include/asm/tlb.h
@@ -31,24 +31,26 @@ static inline void tlb_flush(struct mmu_gather *tlb)
  */
 static inline void __tlb_remove_table(void *table)
 {
-       free_page_and_swap_cache(table);
+       struct ptdesc *ptdesc = (struct ptdesc *)table;
+
+       pagetable_free(ptdesc);
 }
 
 #ifdef CONFIG_PT_RECLAIM
 static inline void __tlb_remove_table_one_rcu(struct rcu_head *head)
 {
-       struct page *page;
+       struct ptdesc *ptdesc;
 
-       page = container_of(head, struct page, rcu_head);
-       put_page(page);
+       ptdesc = container_of(head, struct ptdesc, pt_rcu_head);
+       __tlb_remove_table(ptdesc);
 }
 
 static inline void __tlb_remove_table_one(void *table)
 {
-       struct page *page;
+       struct ptdesc *ptdesc;
 
-       page = table;
-       call_rcu(&page->rcu_head, __tlb_remove_table_one_rcu);
+       ptdesc = table;
+       call_rcu(&ptdesc->pt_rcu_head, __tlb_remove_table_one_rcu);
 }
 #define __tlb_remove_table_one __tlb_remove_table_one
 #endif /* CONFIG_PT_RECLAIM */

diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c
index 8968892..e9bd0ba 100644 (file)
--- a/arch/x86/kernel/paravirt.c
+++ b/arch/x86/kernel/paravirt.c
@@ -62,7 +62,9 @@ void __init native_pv_lock_init(void)
 #ifndef CONFIG_PT_RECLAIM
 static void native_tlb_remove_table(struct mmu_gather *tlb, void *table)
 {
-       tlb_remove_page(tlb, table);
+       struct ptdesc *ptdesc = (struct ptdesc *)table;
+
+       tlb_remove_page(tlb, ptdesc_page(ptdesc));
 }
 #else
 static void native_tlb_remove_table(struct mmu_gather *tlb, void *table)

diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c
index a6cd966..f951602 100644 (file)
--- a/arch/x86/mm/pgtable.c
+++ b/arch/x86/mm/pgtable.c
@@ -23,7 +23,9 @@ EXPORT_SYMBOL(physical_mask);
 static inline
 void paravirt_tlb_remove_table(struct mmu_gather *tlb, void *table)
 {
-       tlb_remove_page(tlb, table);
+       struct ptdesc *ptdesc = (struct ptdesc *)table;
+
+       tlb_remove_page(tlb, ptdesc_page(ptdesc));
 }
 #else
 static inline
@@ -62,7 +64,7 @@ void ___pte_free_tlb(struct mmu_gather *tlb, struct page *pte)
 {
        pagetable_dtor(page_ptdesc(pte));
        paravirt_release_pte(page_to_pfn(pte));
-       paravirt_tlb_remove_table(tlb, pte);
+       paravirt_tlb_remove_table(tlb, page_ptdesc(pte));
 }
 
 #if CONFIG_PGTABLE_LEVELS > 2
@@ -78,7 +80,7 @@ void ___pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd)
        tlb->need_flush_all = 1;
 #endif
        pagetable_dtor(ptdesc);
-       paravirt_tlb_remove_table(tlb, ptdesc_page(ptdesc));
+       paravirt_tlb_remove_table(tlb, ptdesc);
 }
 
 #if CONFIG_PGTABLE_LEVELS > 3
@@ -88,7 +90,7 @@ void ___pud_free_tlb(struct mmu_gather *tlb, pud_t *pud)
 
        pagetable_dtor(ptdesc);
        paravirt_release_pud(__pa(pud) >> PAGE_SHIFT);
-       paravirt_tlb_remove_table(tlb, virt_to_page(pud));
+       paravirt_tlb_remove_table(tlb, ptdesc);
 }
 
 #if CONFIG_PGTABLE_LEVELS > 4
@@ -98,7 +100,7 @@ void ___p4d_free_tlb(struct mmu_gather *tlb, p4d_t *p4d)
 
        pagetable_dtor(ptdesc);
        paravirt_release_p4d(__pa(p4d) >> PAGE_SHIFT);
-       paravirt_tlb_remove_table(tlb, virt_to_page(p4d));
+       paravirt_tlb_remove_table(tlb, ptdesc);
 }
 #endif /* CONFIG_PGTABLE_LEVELS > 4 */
 #endif /* CONFIG_PGTABLE_LEVELS > 3 */