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From: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
To: linuxppc-dev@lists.ozlabs.org, mpe@ellerman.id.au,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	kvm-ppc@vger.kernel.org
Cc: npiggin@gmail.com, paulus@ozlabs.org, leonardo@linux.ibm.com,
	kirill@shutemov.name,
	"Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Subject: [PATCH v3 12/22] powerpc/kvm/book3s: Add helper for host page table walk
Date: Mon, 20 Apr 2020 18:14:24 +0530	[thread overview]
Message-ID: <20200420124434.47330-13-aneesh.kumar@linux.ibm.com> (raw)
In-Reply-To: <20200420124434.47330-1-aneesh.kumar@linux.ibm.com>

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
---
 arch/powerpc/include/asm/kvm_book3s_64.h | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/arch/powerpc/include/asm/kvm_book3s_64.h b/arch/powerpc/include/asm/kvm_book3s_64.h
index 2860521992b6..1ca1f6495012 100644
--- a/arch/powerpc/include/asm/kvm_book3s_64.h
+++ b/arch/powerpc/include/asm/kvm_book3s_64.h
@@ -647,6 +647,22 @@ static inline pte_t *find_kvm_secondary_pte(struct kvm *kvm, unsigned long ea,
 	return pte;
 }
 
+static inline pte_t *find_kvm_host_pte(struct kvm *kvm, unsigned long mmu_seq,
+				       unsigned long ea, unsigned *hshift)
+{
+	pte_t *pte;
+
+	VM_WARN(!spin_is_locked(&kvm->mmu_lock),
+		"%s called with kvm mmu_lock not held \n", __func__);
+
+	if (mmu_notifier_retry(kvm, mmu_seq))
+		return NULL;
+
+	pte = __find_linux_pte(kvm->mm->pgd, ea, NULL, hshift);
+
+	return pte;
+}
+
 extern pte_t *find_kvm_nested_guest_pte(struct kvm *kvm, unsigned long lpid,
 					unsigned long ea, unsigned *hshift);
 
-- 
2.25.3


  parent reply	other threads:[~2020-04-20 12:46 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-20 12:44 [PATCH v3 00/22] Avoid IPI while updating page table entries Aneesh Kumar K.V
2020-04-20 12:44 ` [PATCH v3 01/22] powerpc/pkeys: Avoid using lockless page table walk Aneesh Kumar K.V
2020-04-20 12:44 ` [PATCH v3 02/22] powerpc/pkeys: Check vma before returning key fault error to the user Aneesh Kumar K.V
2020-04-20 12:44 ` [PATCH v3 03/22] powerpc/mm/hash64: use _PAGE_PTE when checking for pte_present Aneesh Kumar K.V
2020-04-20 12:44 ` [PATCH v3 04/22] powerpc/hash64: Restrict page table lookup using init_mm with __flush_hash_table_range Aneesh Kumar K.V
2020-04-20 12:44 ` [PATCH v3 05/22] powerpc/book3s64/hash: Use the pte_t address from the caller Aneesh Kumar K.V
2020-04-20 12:44 ` [PATCH v3 06/22] powerpc/mce: Don't reload pte val in addr_to_pfn Aneesh Kumar K.V
2020-04-20 12:44 ` [PATCH v3 07/22] powerpc/perf/callchain: Use __get_user_pages_fast in read_user_stack_slow Aneesh Kumar K.V
2020-04-20 12:44 ` [PATCH v3 08/22] powerpc/kvm/book3s: switch from raw_spin_*lock to arch_spin_lock Aneesh Kumar K.V
2020-04-20 12:44 ` [PATCH v3 09/22] powerpc/kvm/book3s: Add helper to walk partition scoped linux page table Aneesh Kumar K.V
2020-04-20 12:44 ` [PATCH v3 10/22] powerpc/kvm/nested: Add helper to walk nested shadow " Aneesh Kumar K.V
2020-04-20 12:44 ` [PATCH v3 11/22] powerpc/kvm/book3s: Use kvm helpers to walk shadow or secondary table Aneesh Kumar K.V
2020-04-20 12:44 ` Aneesh Kumar K.V [this message]
2020-04-20 12:44 ` [PATCH v3 13/22] powerpc/kvm/book3s: Use find_kvm_host_pte in page fault handler Aneesh Kumar K.V
2020-04-20 12:44 ` [PATCH v3 14/22] powerpc/kvm/book3s: Use find_kvm_host_pte in h_enter Aneesh Kumar K.V
2020-04-20 12:44 ` [PATCH v3 15/22] powerpc/kvm/book3s: use find_kvm_host_pte in pute_tce functions Aneesh Kumar K.V
2020-04-20 12:44 ` [PATCH v3 16/22] powerpc/kvm/book3s: Avoid using rmap to protect parallel page table update Aneesh Kumar K.V
2020-04-20 12:44 ` [PATCH v3 17/22] powerpc/kvm/book3s: use find_kvm_host_pte in kvmppc_book3s_instantiate_page Aneesh Kumar K.V
2020-04-20 12:44 ` [PATCH v3 18/22] powerpc/kvm/book3s: Use find_kvm_host_pte in kvmppc_get_hpa Aneesh Kumar K.V
2020-04-20 12:44 ` [PATCH v3 19/22] powerpc/kvm/book3s: Use pte_present instead of opencoding _PAGE_PRESENT check Aneesh Kumar K.V
2020-04-20 12:44 ` [PATCH v3 20/22] powerpc/mm/book3s64: Avoid sending IPI on clearing PMD Aneesh Kumar K.V
2020-04-20 12:44 ` [PATCH v3 21/22] mm: change pmdp_huge_get_and_clear_full take vm_area_struct as arg Aneesh Kumar K.V
2020-04-20 12:44 ` [PATCH v3 22/22] powerpc/mm/book3s64: Fix MADV_DONTNEED and parallel page fault race Aneesh Kumar K.V

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