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    Subject[RFC PATCH v2 09/27] x86/mm: Change _PAGE_DIRTY to _PAGE_DIRTY_HW
    Date
    We are going to create _PAGE_DIRTY_SW for non-hardware, memory
    management purposes. 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 in this
    patch.

    Signed-off-by: Yu-cheng Yu <yu-cheng.yu@intel.com>
    ---
    arch/x86/include/asm/pgtable.h | 6 +++---
    arch/x86/include/asm/pgtable_types.h | 17 +++++++++--------
    arch/x86/kernel/relocate_kernel_64.S | 2 +-
    arch/x86/kvm/vmx.c | 2 +-
    4 files changed, 14 insertions(+), 13 deletions(-)

    diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
    index 5715647fc4fe..28806f8f36c3 100644
    --- a/arch/x86/include/asm/pgtable.h
    +++ b/arch/x86/include/asm/pgtable.h
    @@ -303,7 +303,7 @@ 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)
    @@ -377,7 +377,7 @@ 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)
    @@ -436,7 +436,7 @@ 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 99fff853c944..806abf530f50 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)
    @@ -72,7 +72,7 @@
    _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)
    #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 11eda21eb697..e7665a4767b3 100644
    --- a/arch/x86/kernel/relocate_kernel_64.S
    +++ b/arch/x86/kernel/relocate_kernel_64.S
    @@ -17,7 +17,7 @@
    */

    #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.c b/arch/x86/kvm/vmx.c
    index 1689f433f3a0..faef36473105 100644
    --- a/arch/x86/kvm/vmx.c
    +++ b/arch/x86/kvm/vmx.c
    @@ -5467,7 +5467,7 @@ 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)
    --
    2.17.1
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