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Message-ID: <b2e12168-e257-408d-b258-5da7d795d6c3@csgroup.eu>
Date: Tue, 5 Mar 2024 17:31:14 +0000
From: Christophe Leroy <christophe.leroy@...roup.eu>
To: "peterx@...hat.com" <peterx@...hat.com>, "linux-mm@...ck.org"
<linux-mm@...ck.org>, "linux-kernel@...r.kernel.org"
<linux-kernel@...r.kernel.org>
CC: "x86@...nel.org" <x86@...nel.org>, "Kirill A . Shutemov"
<kirill@...temov.name>, Jason Gunthorpe <jgg@...dia.com>, Yang Shi
<shy828301@...il.com>, Andrew Morton <akpm@...ux-foundation.org>,
"linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>, Muchun Song
<muchun.song@...ux.dev>, Michael Ellerman <mpe@...erman.id.au>, Nicholas
Piggin <npiggin@...il.com>, Aneesh Kumar K.V <aneesh.kumar@...nel.org>,
"Naveen N. Rao" <naveen.n.rao@...ux.ibm.com>
Subject: Re: [PATCH v3 02/10] mm/ppc: Replace pXd_is_leaf() with pXd_leaf()
Le 05/03/2024 à 05:37, peterx@...hat.com a écrit :
> From: Peter Xu <peterx@...hat.com>
>
> They're the same macros underneath. Drop pXd_is_leaf(), instead always use
> pXd_leaf().
>
> At the meantime, instead of renames, drop the pXd_is_leaf() fallback
> definitions directly in arch/powerpc/include/asm/pgtable.h. because similar
> fallback macros for pXd_leaf() are already defined in
> include/linux/pgtable.h.
>
> Cc: Michael Ellerman <mpe@...erman.id.au>
> Cc: Nicholas Piggin <npiggin@...il.com>
> Cc: "Aneesh Kumar K.V" <aneesh.kumar@...nel.org>
> Cc: "Naveen N. Rao" <naveen.n.rao@...ux.ibm.com>
> Cc: linuxppc-dev@...ts.ozlabs.org
> Suggested-by: Christophe Leroy <christophe.leroy@...roup.eu>
> Reviewed-by: Jason Gunthorpe <jgg@...dia.com>
> Signed-off-by: Peter Xu <peterx@...hat.com>
Reviewed-by: Christophe Leroy <christophe.leroy@...roup.eu>
In case you post a new version, in the subject, usually with use powerpc
not ppc
> ---
> arch/powerpc/include/asm/book3s/64/pgtable.h | 10 ++++----
> arch/powerpc/include/asm/pgtable.h | 24 --------------------
> arch/powerpc/kvm/book3s_64_mmu_radix.c | 12 +++++-----
> arch/powerpc/mm/book3s64/radix_pgtable.c | 14 ++++++------
> arch/powerpc/mm/pgtable.c | 6 ++---
> arch/powerpc/mm/pgtable_64.c | 6 ++---
> arch/powerpc/xmon/xmon.c | 6 ++---
> 7 files changed, 26 insertions(+), 52 deletions(-)
>
> diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h b/arch/powerpc/include/asm/book3s/64/pgtable.h
> index d1318e8582ac..3e99e409774a 100644
> --- a/arch/powerpc/include/asm/book3s/64/pgtable.h
> +++ b/arch/powerpc/include/asm/book3s/64/pgtable.h
> @@ -1439,18 +1439,16 @@ static inline bool is_pte_rw_upgrade(unsigned long old_val, unsigned long new_va
> /*
> * Like pmd_huge() and pmd_large(), but works regardless of config options
> */
> -#define pmd_is_leaf pmd_is_leaf
> -#define pmd_leaf pmd_is_leaf
> +#define pmd_leaf pmd_leaf
> #define pmd_large pmd_leaf
> -static inline bool pmd_is_leaf(pmd_t pmd)
> +static inline bool pmd_leaf(pmd_t pmd)
> {
> return !!(pmd_raw(pmd) & cpu_to_be64(_PAGE_PTE));
> }
>
> -#define pud_is_leaf pud_is_leaf
> -#define pud_leaf pud_is_leaf
> +#define pud_leaf pud_leaf
> #define pud_large pud_leaf
> -static inline bool pud_is_leaf(pud_t pud)
> +static inline bool pud_leaf(pud_t pud)
> {
> return !!(pud_raw(pud) & cpu_to_be64(_PAGE_PTE));
> }
> diff --git a/arch/powerpc/include/asm/pgtable.h b/arch/powerpc/include/asm/pgtable.h
> index 5928b3c1458d..e6edf1cdbc5b 100644
> --- a/arch/powerpc/include/asm/pgtable.h
> +++ b/arch/powerpc/include/asm/pgtable.h
> @@ -182,30 +182,6 @@ static inline void pte_frag_set(mm_context_t *ctx, void *p)
> }
> #endif
>
> -#ifndef pmd_is_leaf
> -#define pmd_is_leaf pmd_is_leaf
> -static inline bool pmd_is_leaf(pmd_t pmd)
> -{
> - return false;
> -}
> -#endif
> -
> -#ifndef pud_is_leaf
> -#define pud_is_leaf pud_is_leaf
> -static inline bool pud_is_leaf(pud_t pud)
> -{
> - return false;
> -}
> -#endif
> -
> -#ifndef p4d_is_leaf
> -#define p4d_is_leaf p4d_is_leaf
> -static inline bool p4d_is_leaf(p4d_t p4d)
> -{
> - return false;
> -}
> -#endif
> -
> #define pmd_pgtable pmd_pgtable
> static inline pgtable_t pmd_pgtable(pmd_t pmd)
> {
> diff --git a/arch/powerpc/kvm/book3s_64_mmu_radix.c b/arch/powerpc/kvm/book3s_64_mmu_radix.c
> index 4a1abb9f7c05..408d98f8a514 100644
> --- a/arch/powerpc/kvm/book3s_64_mmu_radix.c
> +++ b/arch/powerpc/kvm/book3s_64_mmu_radix.c
> @@ -503,7 +503,7 @@ static void kvmppc_unmap_free_pmd(struct kvm *kvm, pmd_t *pmd, bool full,
> for (im = 0; im < PTRS_PER_PMD; ++im, ++p) {
> if (!pmd_present(*p))
> continue;
> - if (pmd_is_leaf(*p)) {
> + if (pmd_leaf(*p)) {
> if (full) {
> pmd_clear(p);
> } else {
> @@ -532,7 +532,7 @@ static void kvmppc_unmap_free_pud(struct kvm *kvm, pud_t *pud,
> for (iu = 0; iu < PTRS_PER_PUD; ++iu, ++p) {
> if (!pud_present(*p))
> continue;
> - if (pud_is_leaf(*p)) {
> + if (pud_leaf(*p)) {
> pud_clear(p);
> } else {
> pmd_t *pmd;
> @@ -635,12 +635,12 @@ int kvmppc_create_pte(struct kvm *kvm, pgd_t *pgtable, pte_t pte,
> new_pud = pud_alloc_one(kvm->mm, gpa);
>
> pmd = NULL;
> - if (pud && pud_present(*pud) && !pud_is_leaf(*pud))
> + if (pud && pud_present(*pud) && !pud_leaf(*pud))
> pmd = pmd_offset(pud, gpa);
> else if (level <= 1)
> new_pmd = kvmppc_pmd_alloc();
>
> - if (level == 0 && !(pmd && pmd_present(*pmd) && !pmd_is_leaf(*pmd)))
> + if (level == 0 && !(pmd && pmd_present(*pmd) && !pmd_leaf(*pmd)))
> new_ptep = kvmppc_pte_alloc();
>
> /* Check if we might have been invalidated; let the guest retry if so */
> @@ -658,7 +658,7 @@ int kvmppc_create_pte(struct kvm *kvm, pgd_t *pgtable, pte_t pte,
> new_pud = NULL;
> }
> pud = pud_offset(p4d, gpa);
> - if (pud_is_leaf(*pud)) {
> + if (pud_leaf(*pud)) {
> unsigned long hgpa = gpa & PUD_MASK;
>
> /* Check if we raced and someone else has set the same thing */
> @@ -709,7 +709,7 @@ int kvmppc_create_pte(struct kvm *kvm, pgd_t *pgtable, pte_t pte,
> new_pmd = NULL;
> }
> pmd = pmd_offset(pud, gpa);
> - if (pmd_is_leaf(*pmd)) {
> + if (pmd_leaf(*pmd)) {
> unsigned long lgpa = gpa & PMD_MASK;
>
> /* Check if we raced and someone else has set the same thing */
> diff --git a/arch/powerpc/mm/book3s64/radix_pgtable.c b/arch/powerpc/mm/book3s64/radix_pgtable.c
> index c6a4ac766b2b..1f8db10693e3 100644
> --- a/arch/powerpc/mm/book3s64/radix_pgtable.c
> +++ b/arch/powerpc/mm/book3s64/radix_pgtable.c
> @@ -204,14 +204,14 @@ static void radix__change_memory_range(unsigned long start, unsigned long end,
> pudp = pud_alloc(&init_mm, p4dp, idx);
> if (!pudp)
> continue;
> - if (pud_is_leaf(*pudp)) {
> + if (pud_leaf(*pudp)) {
> ptep = (pte_t *)pudp;
> goto update_the_pte;
> }
> pmdp = pmd_alloc(&init_mm, pudp, idx);
> if (!pmdp)
> continue;
> - if (pmd_is_leaf(*pmdp)) {
> + if (pmd_leaf(*pmdp)) {
> ptep = pmdp_ptep(pmdp);
> goto update_the_pte;
> }
> @@ -767,7 +767,7 @@ static void __meminit remove_pmd_table(pmd_t *pmd_start, unsigned long addr,
> if (!pmd_present(*pmd))
> continue;
>
> - if (pmd_is_leaf(*pmd)) {
> + if (pmd_leaf(*pmd)) {
> if (IS_ALIGNED(addr, PMD_SIZE) &&
> IS_ALIGNED(next, PMD_SIZE)) {
> if (!direct)
> @@ -807,7 +807,7 @@ static void __meminit remove_pud_table(pud_t *pud_start, unsigned long addr,
> if (!pud_present(*pud))
> continue;
>
> - if (pud_is_leaf(*pud)) {
> + if (pud_leaf(*pud)) {
> if (!IS_ALIGNED(addr, PUD_SIZE) ||
> !IS_ALIGNED(next, PUD_SIZE)) {
> WARN_ONCE(1, "%s: unaligned range\n", __func__);
> @@ -845,7 +845,7 @@ remove_pagetable(unsigned long start, unsigned long end, bool direct,
> if (!p4d_present(*p4d))
> continue;
>
> - if (p4d_is_leaf(*p4d)) {
> + if (p4d_leaf(*p4d)) {
> if (!IS_ALIGNED(addr, P4D_SIZE) ||
> !IS_ALIGNED(next, P4D_SIZE)) {
> WARN_ONCE(1, "%s: unaligned range\n", __func__);
> @@ -1554,7 +1554,7 @@ int pud_set_huge(pud_t *pud, phys_addr_t addr, pgprot_t prot)
>
> int pud_clear_huge(pud_t *pud)
> {
> - if (pud_is_leaf(*pud)) {
> + if (pud_leaf(*pud)) {
> pud_clear(pud);
> return 1;
> }
> @@ -1601,7 +1601,7 @@ int pmd_set_huge(pmd_t *pmd, phys_addr_t addr, pgprot_t prot)
>
> int pmd_clear_huge(pmd_t *pmd)
> {
> - if (pmd_is_leaf(*pmd)) {
> + if (pmd_leaf(*pmd)) {
> pmd_clear(pmd);
> return 1;
> }
> diff --git a/arch/powerpc/mm/pgtable.c b/arch/powerpc/mm/pgtable.c
> index 549a440ed7f6..9e7ba9c3851f 100644
> --- a/arch/powerpc/mm/pgtable.c
> +++ b/arch/powerpc/mm/pgtable.c
> @@ -410,7 +410,7 @@ pte_t *__find_linux_pte(pgd_t *pgdir, unsigned long ea,
> if (p4d_none(p4d))
> return NULL;
>
> - if (p4d_is_leaf(p4d)) {
> + if (p4d_leaf(p4d)) {
> ret_pte = (pte_t *)p4dp;
> goto out;
> }
> @@ -432,7 +432,7 @@ pte_t *__find_linux_pte(pgd_t *pgdir, unsigned long ea,
> if (pud_none(pud))
> return NULL;
>
> - if (pud_is_leaf(pud)) {
> + if (pud_leaf(pud)) {
> ret_pte = (pte_t *)pudp;
> goto out;
> }
> @@ -471,7 +471,7 @@ pte_t *__find_linux_pte(pgd_t *pgdir, unsigned long ea,
> goto out;
> }
>
> - if (pmd_is_leaf(pmd)) {
> + if (pmd_leaf(pmd)) {
> ret_pte = (pte_t *)pmdp;
> goto out;
> }
> diff --git a/arch/powerpc/mm/pgtable_64.c b/arch/powerpc/mm/pgtable_64.c
> index 1b366526f4f2..386c6b06eab7 100644
> --- a/arch/powerpc/mm/pgtable_64.c
> +++ b/arch/powerpc/mm/pgtable_64.c
> @@ -100,7 +100,7 @@ EXPORT_SYMBOL(__pte_frag_size_shift);
> /* 4 level page table */
> struct page *p4d_page(p4d_t p4d)
> {
> - if (p4d_is_leaf(p4d)) {
> + if (p4d_leaf(p4d)) {
> if (!IS_ENABLED(CONFIG_HAVE_ARCH_HUGE_VMAP))
> VM_WARN_ON(!p4d_huge(p4d));
> return pte_page(p4d_pte(p4d));
> @@ -111,7 +111,7 @@ struct page *p4d_page(p4d_t p4d)
>
> struct page *pud_page(pud_t pud)
> {
> - if (pud_is_leaf(pud)) {
> + if (pud_leaf(pud)) {
> if (!IS_ENABLED(CONFIG_HAVE_ARCH_HUGE_VMAP))
> VM_WARN_ON(!pud_huge(pud));
> return pte_page(pud_pte(pud));
> @@ -125,7 +125,7 @@ struct page *pud_page(pud_t pud)
> */
> struct page *pmd_page(pmd_t pmd)
> {
> - if (pmd_is_leaf(pmd)) {
> + if (pmd_leaf(pmd)) {
> /*
> * vmalloc_to_page may be called on any vmap address (not only
> * vmalloc), and it uses pmd_page() etc., when huge vmap is
> diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c
> index b3b94cd37713..9669c9925225 100644
> --- a/arch/powerpc/xmon/xmon.c
> +++ b/arch/powerpc/xmon/xmon.c
> @@ -3342,7 +3342,7 @@ static void show_pte(unsigned long addr)
> return;
> }
>
> - if (p4d_is_leaf(*p4dp)) {
> + if (p4d_leaf(*p4dp)) {
> format_pte(p4dp, p4d_val(*p4dp));
> return;
> }
> @@ -3356,7 +3356,7 @@ static void show_pte(unsigned long addr)
> return;
> }
>
> - if (pud_is_leaf(*pudp)) {
> + if (pud_leaf(*pudp)) {
> format_pte(pudp, pud_val(*pudp));
> return;
> }
> @@ -3370,7 +3370,7 @@ static void show_pte(unsigned long addr)
> return;
> }
>
> - if (pmd_is_leaf(*pmdp)) {
> + if (pmd_leaf(*pmdp)) {
> format_pte(pmdp, pmd_val(*pmdp));
> return;
> }
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