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Mon, 07 Dec 2020 03:35:08 -0800 (PST) From: yulei.kernel@gmail.com X-Google-Original-From: yuleixzhang@tencent.com To: linux-mm@kvack.org, akpm@linux-foundation.org, linux-fsdevel@vger.kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, naoya.horiguchi@nec.com, viro@zeniv.linux.org.uk, pbonzini@redhat.com Cc: joao.m.martins@oracle.com, rdunlap@infradead.org, sean.j.christopherson@intel.com, xiaoguangrong.eric@gmail.com, kernellwp@gmail.com, lihaiwei.kernel@gmail.com, Yulei Zhang , Chen Zhuo Subject: [RFC V2 26/37] mm, dmem: introduce pud_special() for dmem huge pud support Date: Mon, 7 Dec 2020 19:31:19 +0800 Message-Id: <24c19b7db2fa3b405358489fc74a02cf648bfaf1.1607332046.git.yuleixzhang@tencent.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Yulei Zhang pud_special() will check both _PAGE_SPECIAL and _PAGE_DMEM bit as pmd_special() does. Signed-off-by: Chen Zhuo Signed-off-by: Yulei Zhang --- arch/x86/include/asm/pgtable.h | 13 +++++++++++++ include/linux/pgtable.h | 10 ++++++++++ 2 files changed, 23 insertions(+) diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtabl= e.h index 6ce85d4..9e36d42 100644 --- a/arch/x86/include/asm/pgtable.h +++ b/arch/x86/include/asm/pgtable.h @@ -281,6 +281,12 @@ static inline int pmd_special(pmd_t pmd) return (pmd_val(pmd) & (_PAGE_SPECIAL | _PAGE_DMEM)) =3D=3D (_PAGE_SPECIAL | _PAGE_DMEM); } + +static inline int pud_special(pud_t pud) +{ + return (pud_val(pud) & (_PAGE_SPECIAL | _PAGE_DMEM)) =3D=3D + (_PAGE_SPECIAL | _PAGE_DMEM); +} #endif =20 #ifdef CONFIG_ARCH_HAS_PTE_DEVMAP @@ -516,6 +522,13 @@ static inline pud_t pud_mkdirty(pud_t pud) return pud_set_flags(pud, _PAGE_DIRTY | _PAGE_SOFT_DIRTY); } =20 +#ifdef CONFIG_ARCH_HAS_PTE_DMEM +static inline pud_t pud_mkdmem(pud_t pud) +{ + return pud_set_flags(pud, _PAGE_SPECIAL | _PAGE_DMEM); +} +#endif + static inline pud_t pud_mkdevmap(pud_t pud) { return pud_set_flags(pud, _PAGE_DEVMAP); diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h index 30342b8..0ef03ff 100644 --- a/include/linux/pgtable.h +++ b/include/linux/pgtable.h @@ -1167,6 +1167,16 @@ static inline int pmd_special(pmd_t pmd) { return 0; } + +static inline pud_t pud_mkdmem(pud_t pud) +{ + return pud; +} + +static inline int pud_special(pud_t pud) +{ + return 0; +} #endif =20 #ifndef pmd_read_atomic --=20 1.8.3.1