2023-12-19 18:04:40

by Jisheng Zhang

Subject: [PATCH 2/4] riscv: tlb: convert __p*d_free_tlb() to inline functions

This is to prepare for enabling MMU_GATHER_RCU_TABLE_FREE.
No functionality changes.

Signed-off-by: Jisheng Zhang <[email protected]>
---
arch/riscv/include/asm/pgalloc.h | 54 +++++++++++++++++++-------------
1 file changed, 32 insertions(+), 22 deletions(-)

diff --git a/arch/riscv/include/asm/pgalloc.h b/arch/riscv/include/asm/pgalloc.h
index a12fb83fa1f5..3c5e3bd15f46 100644
--- a/arch/riscv/include/asm/pgalloc.h
+++ b/arch/riscv/include/asm/pgalloc.h
@@ -95,13 +95,16 @@ static inline void pud_free(struct mm_struct *mm, pud_t *pud)
__pud_free(mm, pud);
}

-#define __pud_free_tlb(tlb, pud, addr) \
-do { \
- if (pgtable_l4_enabled) { \
- pagetable_pud_dtor(virt_to_ptdesc(pud)); \
- tlb_remove_page_ptdesc((tlb), virt_to_ptdesc(pud)); \
- } \
-} while (0)
+static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pud,
+ unsigned long addr)
+{
+ if (pgtable_l4_enabled) {
+ struct ptdesc *ptdesc = virt_to_ptdesc(pud);
+
+ pagetable_pud_dtor(ptdesc);
+ tlb_remove_page_ptdesc(tlb, ptdesc);
+ }
+}

#define p4d_alloc_one p4d_alloc_one
static inline p4d_t *p4d_alloc_one(struct mm_struct *mm, unsigned long addr)
@@ -130,11 +133,12 @@ static inline void p4d_free(struct mm_struct *mm, p4d_t *p4d)
__p4d_free(mm, p4d);
}

-#define __p4d_free_tlb(tlb, p4d, addr) \
-do { \
- if (pgtable_l5_enabled) \
- tlb_remove_page_ptdesc((tlb), virt_to_ptdesc(p4d)); \
-} while (0)
+static inline void __p4d_free_tlb(struct mmu_gather *tlb, p4d_t *p4d,
+ unsigned long addr)
+{
+ if (pgtable_l5_enabled)
+ tlb_remove_page_ptdesc(tlb, virt_to_ptdesc(p4d));
+}
#endif /* __PAGETABLE_PMD_FOLDED */

static inline void sync_kernel_mappings(pgd_t *pgd)
@@ -159,19 +163,25 @@ static inline pgd_t *pgd_alloc(struct mm_struct *mm)

#ifndef __PAGETABLE_PMD_FOLDED

-#define __pmd_free_tlb(tlb, pmd, addr) \
-do { \
- pagetable_pmd_dtor(virt_to_ptdesc(pmd)); \
- tlb_remove_page_ptdesc((tlb), virt_to_ptdesc(pmd)); \
-} while (0)
+static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd,
+ unsigned long addr)
+{
+ struct ptdesc *ptdesc = virt_to_ptdesc(pmd);
+
+ pagetable_pmd_dtor(ptdesc);
+ tlb_remove_page_ptdesc(tlb, ptdesc);
+}

#endif /* __PAGETABLE_PMD_FOLDED */

-#define __pte_free_tlb(tlb, pte, buf) \
-do { \
- pagetable_pte_dtor(page_ptdesc(pte)); \
- tlb_remove_page_ptdesc((tlb), page_ptdesc(pte));\
-} while (0)
+static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte,
+ unsigned long addr)
+{
+ struct ptdesc *ptdesc = page_ptdesc(pte);
+
+ pagetable_pte_dtor(ptdesc);
+ tlb_remove_page_ptdesc(tlb, ptdesc);
+}
#endif /* CONFIG_MMU */

#endif /* _ASM_RISCV_PGALLOC_H */
--
2.40.0

2023-12-20 03:00:53

by Yunhui Cui

Subject: Re: [External] [PATCH 2/4] riscv: tlb: convert __p*d_free_tlb() to inline functions

Hi Jisheng,

On Wed, Dec 20, 2023 at 2:04 AM Jisheng Zhang <[email protected]> wrote:
>
> This is to prepare for enabling MMU_GATHER_RCU_TABLE_FREE.
> No functionality changes.
>
> Signed-off-by: Jisheng Zhang <[email protected]>
> ---
> arch/riscv/include/asm/pgalloc.h | 54 +++++++++++++++++++-------------
> 1 file changed, 32 insertions(+), 22 deletions(-)
>
> diff --git a/arch/riscv/include/asm/pgalloc.h b/arch/riscv/include/asm/pgalloc.h
> index a12fb83fa1f5..3c5e3bd15f46 100644
> --- a/arch/riscv/include/asm/pgalloc.h
> +++ b/arch/riscv/include/asm/pgalloc.h
> @@ -95,13 +95,16 @@ static inline void pud_free(struct mm_struct *mm, pud_t *pud)
> __pud_free(mm, pud);
> }
>
> -#define __pud_free_tlb(tlb, pud, addr) \
> -do { \
> - if (pgtable_l4_enabled) { \
> - pagetable_pud_dtor(virt_to_ptdesc(pud)); \
> - tlb_remove_page_ptdesc((tlb), virt_to_ptdesc(pud)); \
> - } \
> -} while (0)
> +static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pud,
> + unsigned long addr)
> +{
> + if (pgtable_l4_enabled) {
> + struct ptdesc *ptdesc = virt_to_ptdesc(pud);
> +
> + pagetable_pud_dtor(ptdesc);
> + tlb_remove_page_ptdesc(tlb, ptdesc);
> + }
> +}
>
> #define p4d_alloc_one p4d_alloc_one
> static inline p4d_t *p4d_alloc_one(struct mm_struct *mm, unsigned long addr)
> @@ -130,11 +133,12 @@ static inline void p4d_free(struct mm_struct *mm, p4d_t *p4d)
> __p4d_free(mm, p4d);
> }
>
> -#define __p4d_free_tlb(tlb, p4d, addr) \
> -do { \
> - if (pgtable_l5_enabled) \
> - tlb_remove_page_ptdesc((tlb), virt_to_ptdesc(p4d)); \
> -} while (0)
> +static inline void __p4d_free_tlb(struct mmu_gather *tlb, p4d_t *p4d,
> + unsigned long addr)
> +{
> + if (pgtable_l5_enabled)
> + tlb_remove_page_ptdesc(tlb, virt_to_ptdesc(p4d));
> +}
> #endif /* __PAGETABLE_PMD_FOLDED */
>
> static inline void sync_kernel_mappings(pgd_t *pgd)
> @@ -159,19 +163,25 @@ static inline pgd_t *pgd_alloc(struct mm_struct *mm)
>
> #ifndef __PAGETABLE_PMD_FOLDED
>
> -#define __pmd_free_tlb(tlb, pmd, addr) \
> -do { \
> - pagetable_pmd_dtor(virt_to_ptdesc(pmd)); \
> - tlb_remove_page_ptdesc((tlb), virt_to_ptdesc(pmd)); \
> -} while (0)
> +static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd,
> + unsigned long addr)
> +{
> + struct ptdesc *ptdesc = virt_to_ptdesc(pmd);
> +
> + pagetable_pmd_dtor(ptdesc);
> + tlb_remove_page_ptdesc(tlb, ptdesc);
> +}
>
> #endif /* __PAGETABLE_PMD_FOLDED */
>
> -#define __pte_free_tlb(tlb, pte, buf) \
> -do { \
> - pagetable_pte_dtor(page_ptdesc(pte)); \
> - tlb_remove_page_ptdesc((tlb), page_ptdesc(pte));\
> -} while (0)
> +static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte,
> + unsigned long addr)
> +{
> + struct ptdesc *ptdesc = page_ptdesc(pte);
> +
> + pagetable_pte_dtor(ptdesc);
> + tlb_remove_page_ptdesc(tlb, ptdesc);
> +}
> #endif /* CONFIG_MMU */
>
> #endif /* _ASM_RISCV_PGALLOC_H */
> --
> 2.40.0
>

Why is it necessary to convert to inline functions?

Thanks,
Yunhui

2023-12-20 13:10:23

by Jisheng Zhang

Subject: Re: [External] [PATCH 2/4] riscv: tlb: convert __p*d_free_tlb() to inline functions

On Wed, Dec 20, 2023 at 10:59:22AM +0800, yunhui cui wrote:
> Hi Jisheng,

Hi,

>
> On Wed, Dec 20, 2023 at 2:04 AM Jisheng Zhang <[email protected]> wrote:
> >
> > This is to prepare for enabling MMU_GATHER_RCU_TABLE_FREE.
> > No functionality changes.
> >
> > Signed-off-by: Jisheng Zhang <[email protected]>
> > ---
> > arch/riscv/include/asm/pgalloc.h | 54 +++++++++++++++++++-------------
> > 1 file changed, 32 insertions(+), 22 deletions(-)
> >
> > diff --git a/arch/riscv/include/asm/pgalloc.h b/arch/riscv/include/asm/pgalloc.h
> > index a12fb83fa1f5..3c5e3bd15f46 100644
> > --- a/arch/riscv/include/asm/pgalloc.h
> > +++ b/arch/riscv/include/asm/pgalloc.h
> > @@ -95,13 +95,16 @@ static inline void pud_free(struct mm_struct *mm, pud_t *pud)
> > __pud_free(mm, pud);
> > }
> >
> > -#define __pud_free_tlb(tlb, pud, addr) \
> > -do { \
> > - if (pgtable_l4_enabled) { \
> > - pagetable_pud_dtor(virt_to_ptdesc(pud)); \
> > - tlb_remove_page_ptdesc((tlb), virt_to_ptdesc(pud)); \
> > - } \
> > -} while (0)
> > +static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pud,
> > + unsigned long addr)
> > +{
> > + if (pgtable_l4_enabled) {
> > + struct ptdesc *ptdesc = virt_to_ptdesc(pud);
> > +
> > + pagetable_pud_dtor(ptdesc);
> > + tlb_remove_page_ptdesc(tlb, ptdesc);
> > + }
> > +}
> >
> > #define p4d_alloc_one p4d_alloc_one
> > static inline p4d_t *p4d_alloc_one(struct mm_struct *mm, unsigned long addr)
> > @@ -130,11 +133,12 @@ static inline void p4d_free(struct mm_struct *mm, p4d_t *p4d)
> > __p4d_free(mm, p4d);
> > }
> >
> > -#define __p4d_free_tlb(tlb, p4d, addr) \
> > -do { \
> > - if (pgtable_l5_enabled) \
> > - tlb_remove_page_ptdesc((tlb), virt_to_ptdesc(p4d)); \
> > -} while (0)
> > +static inline void __p4d_free_tlb(struct mmu_gather *tlb, p4d_t *p4d,
> > + unsigned long addr)
> > +{
> > + if (pgtable_l5_enabled)
> > + tlb_remove_page_ptdesc(tlb, virt_to_ptdesc(p4d));
> > +}
> > #endif /* __PAGETABLE_PMD_FOLDED */
> >
> > static inline void sync_kernel_mappings(pgd_t *pgd)
> > @@ -159,19 +163,25 @@ static inline pgd_t *pgd_alloc(struct mm_struct *mm)
> >
> > #ifndef __PAGETABLE_PMD_FOLDED
> >
> > -#define __pmd_free_tlb(tlb, pmd, addr) \
> > -do { \
> > - pagetable_pmd_dtor(virt_to_ptdesc(pmd)); \
> > - tlb_remove_page_ptdesc((tlb), virt_to_ptdesc(pmd)); \
> > -} while (0)
> > +static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd,
> > + unsigned long addr)
> > +{
> > + struct ptdesc *ptdesc = virt_to_ptdesc(pmd);
> > +
> > + pagetable_pmd_dtor(ptdesc);
> > + tlb_remove_page_ptdesc(tlb, ptdesc);
> > +}
> >
> > #endif /* __PAGETABLE_PMD_FOLDED */
> >
> > -#define __pte_free_tlb(tlb, pte, buf) \
> > -do { \
> > - pagetable_pte_dtor(page_ptdesc(pte)); \
> > - tlb_remove_page_ptdesc((tlb), page_ptdesc(pte));\
> > -} while (0)
> > +static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte,
> > + unsigned long addr)
> > +{
> > + struct ptdesc *ptdesc = page_ptdesc(pte);
> > +
> > + pagetable_pte_dtor(ptdesc);
> > + tlb_remove_page_ptdesc(tlb, ptdesc);
> > +}
> > #endif /* CONFIG_MMU */
> >
> > #endif /* _ASM_RISCV_PGALLOC_H */
> > --
> > 2.40.0
> >
>
> Why is it necessary to convert to inline functions?

Hmm, it's not necessary but a plus, the inline version's readability and
maintainability is better than macros

Regards

2023-12-31 06:24:37

by Alexandre Ghiti

Subject: Re: [PATCH 2/4] riscv: tlb: convert __p*d_free_tlb() to inline functions

On 19/12/2023 18:50, Jisheng Zhang wrote:
> This is to prepare for enabling MMU_GATHER_RCU_TABLE_FREE.
> No functionality changes.
>
> Signed-off-by: Jisheng Zhang <[email protected]>
> ---
> arch/riscv/include/asm/pgalloc.h | 54 +++++++++++++++++++-------------
> 1 file changed, 32 insertions(+), 22 deletions(-)
>
> diff --git a/arch/riscv/include/asm/pgalloc.h b/arch/riscv/include/asm/pgalloc.h
> index a12fb83fa1f5..3c5e3bd15f46 100644
> --- a/arch/riscv/include/asm/pgalloc.h
> +++ b/arch/riscv/include/asm/pgalloc.h
> @@ -95,13 +95,16 @@ static inline void pud_free(struct mm_struct *mm, pud_t *pud)
> __pud_free(mm, pud);
> }
>
> -#define __pud_free_tlb(tlb, pud, addr) \
> -do { \
> - if (pgtable_l4_enabled) { \
> - pagetable_pud_dtor(virt_to_ptdesc(pud)); \
> - tlb_remove_page_ptdesc((tlb), virt_to_ptdesc(pud)); \
> - } \
> -} while (0)
> +static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pud,
> + unsigned long addr)
> +{
> + if (pgtable_l4_enabled) {
> + struct ptdesc *ptdesc = virt_to_ptdesc(pud);
> +
> + pagetable_pud_dtor(ptdesc);
> + tlb_remove_page_ptdesc(tlb, ptdesc);
> + }
> +}
>
> #define p4d_alloc_one p4d_alloc_one
> static inline p4d_t *p4d_alloc_one(struct mm_struct *mm, unsigned long addr)
> @@ -130,11 +133,12 @@ static inline void p4d_free(struct mm_struct *mm, p4d_t *p4d)
> __p4d_free(mm, p4d);
> }
>
> -#define __p4d_free_tlb(tlb, p4d, addr) \
> -do { \
> - if (pgtable_l5_enabled) \
> - tlb_remove_page_ptdesc((tlb), virt_to_ptdesc(p4d)); \
> -} while (0)
> +static inline void __p4d_free_tlb(struct mmu_gather *tlb, p4d_t *p4d,
> + unsigned long addr)
> +{
> + if (pgtable_l5_enabled)
> + tlb_remove_page_ptdesc(tlb, virt_to_ptdesc(p4d));
> +}
> #endif /* __PAGETABLE_PMD_FOLDED */
>
> static inline void sync_kernel_mappings(pgd_t *pgd)
> @@ -159,19 +163,25 @@ static inline pgd_t *pgd_alloc(struct mm_struct *mm)
>
> #ifndef __PAGETABLE_PMD_FOLDED
>
> -#define __pmd_free_tlb(tlb, pmd, addr) \
> -do { \
> - pagetable_pmd_dtor(virt_to_ptdesc(pmd)); \
> - tlb_remove_page_ptdesc((tlb), virt_to_ptdesc(pmd)); \
> -} while (0)
> +static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd,
> + unsigned long addr)
> +{
> + struct ptdesc *ptdesc = virt_to_ptdesc(pmd);
> +
> + pagetable_pmd_dtor(ptdesc);
> + tlb_remove_page_ptdesc(tlb, ptdesc);
> +}
>
> #endif /* __PAGETABLE_PMD_FOLDED */
>
> -#define __pte_free_tlb(tlb, pte, buf) \
> -do { \
> - pagetable_pte_dtor(page_ptdesc(pte)); \
> - tlb_remove_page_ptdesc((tlb), page_ptdesc(pte));\
> -} while (0)
> +static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte,
> + unsigned long addr)
> +{
> + struct ptdesc *ptdesc = page_ptdesc(pte);
> +
> + pagetable_pte_dtor(ptdesc);
> + tlb_remove_page_ptdesc(tlb, ptdesc);
> +}
> #endif /* CONFIG_MMU */
>
> #endif /* _ASM_RISCV_PGALLOC_H */


You can add:

Reviewed-by: Alexandre Ghiti <[email protected]>

Thanks,

Alex