From: Punit Agrawal <punit.agrawal@arm.com>
To: kvmarm@lists.cs.columbia.edu
Cc: Punit Agrawal <punit.agrawal@arm.com>,
marc.zyngier@arm.com, will.deacon@arm.com,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, suzuki.poulose@arm.com,
Russell King <linux@armlinux.org.uk>,
Catalin Marinas <catalin.marinas@arm.com>
Subject: [PATCH v8 4/9] KVM: arm/arm64: Introduce helpers to manipulate page table entries
Date: Mon, 1 Oct 2018 16:54:38 +0100 [thread overview]
Message-ID: <20181001155443.23032-5-punit.agrawal@arm.com> (raw)
In-Reply-To: <20181001155443.23032-1-punit.agrawal@arm.com>
Introduce helpers to abstract architectural handling of the conversion
of pfn to page table entries and marking a PMD page table entry as a
block entry.
The helpers are introduced in preparation for supporting PUD hugepages
at stage 2 - which are supported on arm64 but do not exist on arm.
Signed-off-by: Punit Agrawal <punit.agrawal@arm.com>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Acked-by: Christoffer Dall <christoffer.dall@arm.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
---
arch/arm/include/asm/kvm_mmu.h | 5 +++++
arch/arm64/include/asm/kvm_mmu.h | 5 +++++
virt/kvm/arm/mmu.c | 14 ++++++++------
3 files changed, 18 insertions(+), 6 deletions(-)
diff --git a/arch/arm/include/asm/kvm_mmu.h b/arch/arm/include/asm/kvm_mmu.h
index 5ad1a54f98dc..e77212e53e77 100644
--- a/arch/arm/include/asm/kvm_mmu.h
+++ b/arch/arm/include/asm/kvm_mmu.h
@@ -82,6 +82,11 @@ void kvm_clear_hyp_idmap(void);
#define kvm_mk_pud(pmdp) __pud(__pa(pmdp) | PMD_TYPE_TABLE)
#define kvm_mk_pgd(pudp) ({ BUILD_BUG(); 0; })
+#define kvm_pfn_pte(pfn, prot) pfn_pte(pfn, prot)
+#define kvm_pfn_pmd(pfn, prot) pfn_pmd(pfn, prot)
+
+#define kvm_pmd_mkhuge(pmd) pmd_mkhuge(pmd)
+
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 77b1af9e64db..baabea0cbb66 100644
--- a/arch/arm64/include/asm/kvm_mmu.h
+++ b/arch/arm64/include/asm/kvm_mmu.h
@@ -184,6 +184,11 @@ void kvm_clear_hyp_idmap(void);
#define kvm_mk_pgd(pudp) \
__pgd(__phys_to_pgd_val(__pa(pudp)) | PUD_TYPE_TABLE)
+#define kvm_pfn_pte(pfn, prot) pfn_pte(pfn, prot)
+#define kvm_pfn_pmd(pfn, prot) pfn_pmd(pfn, prot)
+
+#define kvm_pmd_mkhuge(pmd) pmd_mkhuge(pmd)
+
static inline pte_t kvm_s2pte_mkwrite(pte_t pte)
{
pte_val(pte) |= PTE_S2_RDWR;
diff --git a/virt/kvm/arm/mmu.c b/virt/kvm/arm/mmu.c
index ec64d21c6571..21079eb5bc15 100644
--- a/virt/kvm/arm/mmu.c
+++ b/virt/kvm/arm/mmu.c
@@ -607,7 +607,7 @@ static void create_hyp_pte_mappings(pmd_t *pmd, unsigned long start,
addr = start;
do {
pte = pte_offset_kernel(pmd, addr);
- kvm_set_pte(pte, pfn_pte(pfn, prot));
+ kvm_set_pte(pte, kvm_pfn_pte(pfn, prot));
get_page(virt_to_page(pte));
pfn++;
} while (addr += PAGE_SIZE, addr != end);
@@ -1202,7 +1202,7 @@ int kvm_phys_addr_ioremap(struct kvm *kvm, phys_addr_t guest_ipa,
pfn = __phys_to_pfn(pa);
for (addr = guest_ipa; addr < end; addr += PAGE_SIZE) {
- pte_t pte = pfn_pte(pfn, PAGE_S2_DEVICE);
+ pte_t pte = kvm_pfn_pte(pfn, PAGE_S2_DEVICE);
if (writable)
pte = kvm_s2pte_mkwrite(pte);
@@ -1619,8 +1619,10 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
(fault_status == FSC_PERM && stage2_is_exec(kvm, fault_ipa));
if (hugetlb && vma_pagesize == PMD_SIZE) {
- pmd_t new_pmd = pfn_pmd(pfn, mem_type);
- new_pmd = pmd_mkhuge(new_pmd);
+ pmd_t new_pmd = kvm_pfn_pmd(pfn, mem_type);
+
+ new_pmd = kvm_pmd_mkhuge(new_pmd);
+
if (writable)
new_pmd = kvm_s2pmd_mkwrite(new_pmd);
@@ -1629,7 +1631,7 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
ret = stage2_set_pmd_huge(kvm, memcache, fault_ipa, &new_pmd);
} else {
- pte_t new_pte = pfn_pte(pfn, mem_type);
+ pte_t new_pte = kvm_pfn_pte(pfn, mem_type);
if (writable) {
new_pte = kvm_s2pte_mkwrite(new_pte);
@@ -1886,7 +1888,7 @@ void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte)
* just like a translation fault and clean the cache to the PoC.
*/
clean_dcache_guest_page(pfn, PAGE_SIZE);
- stage2_pte = pfn_pte(pfn, PAGE_S2);
+ stage2_pte = kvm_pfn_pte(pfn, PAGE_S2);
handle_hva_to_gpa(kvm, hva, end, &kvm_set_spte_handler, &stage2_pte);
}
--
2.18.0
next prev parent reply other threads:[~2018-10-01 15:55 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-01 15:54 [PATCH v8 0/9] KVM: Support PUD hugepage at stage 2 Punit Agrawal
2018-10-01 15:54 ` [PATCH v8 1/9] KVM: arm/arm64: Ensure only THP is candidate for adjustment Punit Agrawal
2018-10-03 10:50 ` Marc Zyngier
2018-10-03 10:59 ` Punit Agrawal
2018-10-31 14:36 ` Christoffer Dall
2018-10-31 14:52 ` Punit Agrawal
2018-10-31 17:15 ` Punit Agrawal
2018-11-01 8:31 ` Christoffer Dall
2018-10-01 15:54 ` [PATCH v8 2/9] KVM: arm/arm64: Share common code in user_mem_abort() Punit Agrawal
2018-10-01 17:44 ` Suzuki K Poulose
2018-10-03 15:20 ` Marc Zyngier
2018-10-03 16:25 ` Punit Agrawal
2018-10-01 15:54 ` [PATCH v8 3/9] KVM: arm/arm64: Re-factor setting the Stage 2 entry to exec on fault Punit Agrawal
2018-10-01 15:54 ` Punit Agrawal [this message]
2018-10-01 15:54 ` [PATCH v8 5/9] KVM: arm64: Support dirty page tracking for PUD hugepages Punit Agrawal
2018-10-01 15:54 ` [PATCH v8 6/9] KVM: arm64: Support PUD hugepage in stage2_is_exec() Punit Agrawal
2018-10-01 15:54 ` [PATCH v8 7/9] KVM: arm64: Support handling access faults for PUD hugepages Punit Agrawal
2018-10-01 15:54 ` [PATCH v8 8/9] KVM: arm64: Update age handlers to support " Punit Agrawal
2018-10-01 15:54 ` [PATCH v8 9/9] KVM: arm64: Add support for creating PUD hugepages at stage 2 Punit Agrawal
2018-10-01 21:30 ` Suzuki K Poulose
2018-10-02 8:52 ` Punit Agrawal
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