From: Zenghui Yu <yuzenghui@huawei.com>
To: <linux-arm-kernel@lists.infradead.org>,
<kvmarm@lists.cs.columbia.edu>, <linux-kernel@vger.kernel.org>,
<kvm@vger.kernel.org>
Cc: <marc.zyngier@arm.com>, <christoffer.dall@arm.com>,
<linux@armlinux.org.uk>, <catalin.marinas@arm.com>,
<will.deacon@arm.com>, <james.morse@arm.com>,
<julien.thierry@arm.com>, <suzuki.poulose@arm.com>,
<steve.capper@arm.com>, <wanghaibin.wang@huawei.com>,
Zenghui Yu <yuzenghui@huawei.com>
Subject: [PATCH 1/5] KVM: arm/arm64: Introduce helpers for page table enties with contiguous bit
Date: Wed, 1 May 2019 09:44:23 +0000 [thread overview]
Message-ID: <1556703867-22396-2-git-send-email-yuzenghui@huawei.com> (raw)
In-Reply-To: <1556703867-22396-1-git-send-email-yuzenghui@huawei.com>
Introduce helpers to manipulate stage2 page table entries - set contiguous
bit in the entry and say whether this entry points to a contiguous block.
The helpers are introduced in preparation for supporting contiguous
hugepages at stage2.
Signed-off-by: Zenghui Yu <yuzenghui@huawei.com>
---
arch/arm/include/asm/kvm_mmu.h | 22 ++++++++++++++++++++++
arch/arm64/include/asm/kvm_mmu.h | 20 ++++++++++++++++++++
2 files changed, 42 insertions(+)
diff --git a/arch/arm/include/asm/kvm_mmu.h b/arch/arm/include/asm/kvm_mmu.h
index 31de4ab..80d73ae 100644
--- a/arch/arm/include/asm/kvm_mmu.h
+++ b/arch/arm/include/asm/kvm_mmu.h
@@ -143,6 +143,28 @@ static inline bool kvm_s2pud_young(pud_t pud)
return false;
}
+static inline pte_t kvm_s2pte_mkcont(pte_t pte)
+{
+ BUG();
+ return pte;
+}
+
+static inline bool kvm_s2pte_cont(pte_t pte)
+{
+ return false;
+}
+
+static inline pmd_t kvm_s2pmd_mkcont(pmd_t pmd)
+{
+ BUG();
+ return pmd;
+}
+
+static inline bool kvm_s2pmd_cont(pmd_t pmd)
+{
+ return false;
+}
+
static inline pte_t kvm_s2pte_mkwrite(pte_t pte)
{
pte_val(pte) |= L_PTE_S2_RDWR;
diff --git a/arch/arm64/include/asm/kvm_mmu.h b/arch/arm64/include/asm/kvm_mmu.h
index ebeefcf..4afdad9 100644
--- a/arch/arm64/include/asm/kvm_mmu.h
+++ b/arch/arm64/include/asm/kvm_mmu.h
@@ -295,6 +295,26 @@ static inline bool kvm_s2pud_young(pud_t pud)
return pud_young(pud);
}
+static inline pte_t kvm_s2pte_mkcont(pte_t pte)
+{
+ return pte_mkcont(pte);
+}
+
+static inline bool kvm_s2pte_cont(pte_t pte)
+{
+ return pte_cont(pte);
+}
+
+static inline pmd_t kvm_s2pmd_mkcont(pmd_t pmd)
+{
+ return pmd_mkcont(pmd);
+}
+
+static inline bool kvm_s2pmd_cont(pmd_t pmd)
+{
+ return !!(pmd_val(pmd) & PMD_SECT_CONT);
+}
+
#define hyp_pte_table_empty(ptep) kvm_page_empty(ptep)
#ifdef __PAGETABLE_PMD_FOLDED
--
1.8.3.1
next prev parent reply other threads:[~2019-05-01 9:48 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-01 9:44 [RFC PATCH 0/5] KVM: arm64: Add support for contiguous PTE/PMD hugepages at stage2 Zenghui Yu
2019-05-01 9:44 ` Zenghui Yu [this message]
2019-05-01 9:44 ` [PATCH 2/5] KVM: arm/arm64: Re-factor building the stage2 page table entries Zenghui Yu
2019-05-01 9:44 ` [PATCH 3/5] KVM: arm/arm64: Support dirty page tracking for contiguous hugepages Zenghui Yu
2019-05-01 9:44 ` [PATCH 4/5] KVM: arm/arm64: Add support for creating PTE contiguous hugepages at stage2 Zenghui Yu
2019-05-01 9:44 ` [PATCH 5/5] KVM: arm/arm64: Add support for creating PMD " Zenghui Yu
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