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    Subject[RFC PATCH v9 08/27] x86/mm: Change _PAGE_DIRTY to _PAGE_DIRTY_HW
    Date
    Before introducing _PAGE_DIRTY_SW for non-hardware memory management
    purposes in the next patch, rename _PAGE_DIRTY to _PAGE_DIRTY_HW and
    _PAGE_BIT_DIRTY to _PAGE_BIT_DIRTY_HW to make these PTE dirty bits
    more clear. There are no functional changes from this patch.

    v9:
    - At some places _PAGE_DIRTY were not changed to _PAGE_DIRTY_HW, because
    they will be changed again in the next patch to _PAGE_DIRTY_BITS.
    However, this causes compile issues if the next patch is not yet applied.
    Fix it by changing all _PAGE_DIRTY to _PAGE_DRITY_HW.

    Signed-off-by: Yu-cheng Yu <yu-cheng.yu@intel.com>
    ---
    arch/x86/include/asm/pgtable.h | 18 +++++++++---------
    arch/x86/include/asm/pgtable_types.h | 17 +++++++++--------
    arch/x86/kernel/relocate_kernel_64.S | 2 +-
    arch/x86/kvm/vmx/vmx.c | 2 +-
    4 files changed, 20 insertions(+), 19 deletions(-)

    diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
    index ad97dc155195..ab50d25f9afc 100644
    --- a/arch/x86/include/asm/pgtable.h
    +++ b/arch/x86/include/asm/pgtable.h
    @@ -122,7 +122,7 @@ extern pmdval_t early_pmd_flags;
    */
    static inline int pte_dirty(pte_t pte)
    {
    - return pte_flags(pte) & _PAGE_DIRTY;
    + return pte_flags(pte) & _PAGE_DIRTY_HW;
    }


    @@ -161,7 +161,7 @@ static inline int pte_young(pte_t pte)

    static inline int pmd_dirty(pmd_t pmd)
    {
    - return pmd_flags(pmd) & _PAGE_DIRTY;
    + return pmd_flags(pmd) & _PAGE_DIRTY_HW;
    }

    static inline int pmd_young(pmd_t pmd)
    @@ -171,7 +171,7 @@ static inline int pmd_young(pmd_t pmd)

    static inline int pud_dirty(pud_t pud)
    {
    - return pud_flags(pud) & _PAGE_DIRTY;
    + return pud_flags(pud) & _PAGE_DIRTY_HW;
    }

    static inline int pud_young(pud_t pud)
    @@ -312,7 +312,7 @@ static inline pte_t pte_clear_flags(pte_t pte, pteval_t clear)

    static inline pte_t pte_mkclean(pte_t pte)
    {
    - return pte_clear_flags(pte, _PAGE_DIRTY);
    + return pte_clear_flags(pte, _PAGE_DIRTY_HW);
    }

    static inline pte_t pte_mkold(pte_t pte)
    @@ -332,7 +332,7 @@ static inline pte_t pte_mkexec(pte_t pte)

    static inline pte_t pte_mkdirty(pte_t pte)
    {
    - return pte_set_flags(pte, _PAGE_DIRTY | _PAGE_SOFT_DIRTY);
    + return pte_set_flags(pte, _PAGE_DIRTY_HW | _PAGE_SOFT_DIRTY);
    }

    static inline pte_t pte_mkyoung(pte_t pte)
    @@ -396,7 +396,7 @@ static inline pmd_t pmd_mkold(pmd_t pmd)

    static inline pmd_t pmd_mkclean(pmd_t pmd)
    {
    - return pmd_clear_flags(pmd, _PAGE_DIRTY);
    + return pmd_clear_flags(pmd, _PAGE_DIRTY_HW);
    }

    static inline pmd_t pmd_wrprotect(pmd_t pmd)
    @@ -406,7 +406,7 @@ static inline pmd_t pmd_wrprotect(pmd_t pmd)

    static inline pmd_t pmd_mkdirty(pmd_t pmd)
    {
    - return pmd_set_flags(pmd, _PAGE_DIRTY | _PAGE_SOFT_DIRTY);
    + return pmd_set_flags(pmd, _PAGE_DIRTY_HW | _PAGE_SOFT_DIRTY);
    }

    static inline pmd_t pmd_mkdevmap(pmd_t pmd)
    @@ -450,7 +450,7 @@ static inline pud_t pud_mkold(pud_t pud)

    static inline pud_t pud_mkclean(pud_t pud)
    {
    - return pud_clear_flags(pud, _PAGE_DIRTY);
    + return pud_clear_flags(pud, _PAGE_DIRTY_HW);
    }

    static inline pud_t pud_wrprotect(pud_t pud)
    @@ -460,7 +460,7 @@ static inline pud_t pud_wrprotect(pud_t pud)

    static inline pud_t pud_mkdirty(pud_t pud)
    {
    - return pud_set_flags(pud, _PAGE_DIRTY | _PAGE_SOFT_DIRTY);
    + return pud_set_flags(pud, _PAGE_DIRTY_HW | _PAGE_SOFT_DIRTY);
    }

    static inline pud_t pud_mkdevmap(pud_t pud)
    diff --git a/arch/x86/include/asm/pgtable_types.h b/arch/x86/include/asm/pgtable_types.h
    index b5e49e6bac63..e647e3c75578 100644
    --- a/arch/x86/include/asm/pgtable_types.h
    +++ b/arch/x86/include/asm/pgtable_types.h
    @@ -15,7 +15,7 @@
    #define _PAGE_BIT_PWT 3 /* page write through */
    #define _PAGE_BIT_PCD 4 /* page cache disabled */
    #define _PAGE_BIT_ACCESSED 5 /* was accessed (raised by CPU) */
    -#define _PAGE_BIT_DIRTY 6 /* was written to (raised by CPU) */
    +#define _PAGE_BIT_DIRTY_HW 6 /* was written to (raised by CPU) */
    #define _PAGE_BIT_PSE 7 /* 4 MB (or 2MB) page */
    #define _PAGE_BIT_PAT 7 /* on 4KB pages */
    #define _PAGE_BIT_GLOBAL 8 /* Global TLB entry PPro+ */
    @@ -45,7 +45,7 @@
    #define _PAGE_PWT (_AT(pteval_t, 1) << _PAGE_BIT_PWT)
    #define _PAGE_PCD (_AT(pteval_t, 1) << _PAGE_BIT_PCD)
    #define _PAGE_ACCESSED (_AT(pteval_t, 1) << _PAGE_BIT_ACCESSED)
    -#define _PAGE_DIRTY (_AT(pteval_t, 1) << _PAGE_BIT_DIRTY)
    +#define _PAGE_DIRTY_HW (_AT(pteval_t, 1) << _PAGE_BIT_DIRTY_HW)
    #define _PAGE_PSE (_AT(pteval_t, 1) << _PAGE_BIT_PSE)
    #define _PAGE_GLOBAL (_AT(pteval_t, 1) << _PAGE_BIT_GLOBAL)
    #define _PAGE_SOFTW1 (_AT(pteval_t, 1) << _PAGE_BIT_SOFTW1)
    @@ -73,7 +73,7 @@
    _PAGE_PKEY_BIT3)

    #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
    -#define _PAGE_KNL_ERRATUM_MASK (_PAGE_DIRTY | _PAGE_ACCESSED)
    +#define _PAGE_KNL_ERRATUM_MASK (_PAGE_DIRTY_HW | _PAGE_ACCESSED)
    #else
    #define _PAGE_KNL_ERRATUM_MASK 0
    #endif
    @@ -111,9 +111,9 @@
    #define _PAGE_PROTNONE (_AT(pteval_t, 1) << _PAGE_BIT_PROTNONE)

    #define _PAGE_TABLE_NOENC (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER |\
    - _PAGE_ACCESSED | _PAGE_DIRTY)
    + _PAGE_ACCESSED | _PAGE_DIRTY_HW)
    #define _KERNPG_TABLE_NOENC (_PAGE_PRESENT | _PAGE_RW | \
    - _PAGE_ACCESSED | _PAGE_DIRTY)
    + _PAGE_ACCESSED | _PAGE_DIRTY_HW)

    /*
    * Set of bits not changed in pte_modify. The pte's
    @@ -122,7 +122,7 @@
    * pte_modify() does modify it.
    */
    #define _PAGE_CHG_MASK (PTE_PFN_MASK | _PAGE_PCD | _PAGE_PWT | \
    - _PAGE_SPECIAL | _PAGE_ACCESSED | _PAGE_DIRTY | \
    + _PAGE_SPECIAL | _PAGE_ACCESSED | _PAGE_DIRTY_HW | \
    _PAGE_SOFT_DIRTY | _PAGE_DEVMAP)
    #define _HPAGE_CHG_MASK (_PAGE_CHG_MASK | _PAGE_PSE)

    @@ -167,7 +167,8 @@ enum page_cache_mode {
    _PAGE_ACCESSED)

    #define __PAGE_KERNEL_EXEC \
    - (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_GLOBAL)
    + (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY_HW | _PAGE_ACCESSED | \
    + _PAGE_GLOBAL)
    #define __PAGE_KERNEL (__PAGE_KERNEL_EXEC | _PAGE_NX)

    #define __PAGE_KERNEL_RO (__PAGE_KERNEL & ~_PAGE_RW)
    @@ -186,7 +187,7 @@ enum page_cache_mode {
    #define _PAGE_ENC (_AT(pteval_t, sme_me_mask))

    #define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | \
    - _PAGE_DIRTY | _PAGE_ENC)
    + _PAGE_DIRTY_HW | _PAGE_ENC)
    #define _PAGE_TABLE (_KERNPG_TABLE | _PAGE_USER)

    #define __PAGE_KERNEL_ENC (__PAGE_KERNEL | _PAGE_ENC)
    diff --git a/arch/x86/kernel/relocate_kernel_64.S b/arch/x86/kernel/relocate_kernel_64.S
    index ef3ba99068d3..3acd75f97b61 100644
    --- a/arch/x86/kernel/relocate_kernel_64.S
    +++ b/arch/x86/kernel/relocate_kernel_64.S
    @@ -15,7 +15,7 @@
    */

    #define PTR(x) (x << 3)
    -#define PAGE_ATTR (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY)
    +#define PAGE_ATTR (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY_HW)

    /*
    * control_page + KEXEC_CONTROL_CODE_MAX_SIZE
    diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
    index e3394c839dea..fbbbf621b0d9 100644
    --- a/arch/x86/kvm/vmx/vmx.c
    +++ b/arch/x86/kvm/vmx/vmx.c
    @@ -3503,7 +3503,7 @@ static int init_rmode_identity_map(struct kvm *kvm)
    /* Set up identity-mapping pagetable for EPT in real mode */
    for (i = 0; i < PT32_ENT_PER_PAGE; i++) {
    tmp = (i << 22) + (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER |
    - _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_PSE);
    + _PAGE_ACCESSED | _PAGE_DIRTY_HW | _PAGE_PSE);
    r = kvm_write_guest_page(kvm, identity_map_pfn,
    &tmp, i * sizeof(tmp), sizeof(tmp));
    if (r < 0)
    --
    2.21.0
    \
     
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      Last update: 2020-02-05 19:22    [W:2.839 / U:0.184 seconds]
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