From: Marc Zyngier <maz@kernel.org>
To: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org
Cc: Joey Gouly <joey.gouly@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Oliver Upton <oupton@kernel.org>,
Zenghui Yu <yuzenghui@huawei.com>, Fuad Tabba <tabba@google.com>,
Will Deacon <will@kernel.org>,
Quentin Perret <qperret@google.com>
Subject: [PATCH 08/17] KVM: arm64: Kill topup_memcache from kvm_s2_fault
Date: Mon, 16 Mar 2026 17:54:41 +0000 [thread overview]
Message-ID: <20260316175451.1866175-9-maz@kernel.org> (raw)
In-Reply-To: <20260316175451.1866175-1-maz@kernel.org>
The topup_memcache field can be easily replaced by the equivalent
conditions, and the resulting code is not much worse.
Signed-off-by: Marc Zyngier <maz@kernel.org>
---
arch/arm64/kvm/mmu.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c
index 11820e39ad8e1..abe239752c696 100644
--- a/arch/arm64/kvm/mmu.c
+++ b/arch/arm64/kvm/mmu.c
@@ -1712,7 +1712,6 @@ static short kvm_s2_resolve_vma_size(const struct kvm_s2_fault_desc *s2fd,
struct kvm_s2_fault {
bool writable;
- bool topup_memcache;
bool mte_allowed;
bool is_vma_cacheable;
bool s2_force_noncacheable;
@@ -1983,7 +1982,6 @@ static int user_mem_abort(const struct kvm_s2_fault_desc *s2fd)
.logging_active = logging_active,
.force_pte = logging_active,
.prot = KVM_PGTABLE_PROT_R,
- .topup_memcache = !perm_fault || (logging_active && kvm_is_write_fault(s2fd->vcpu)),
};
void *memcache;
int ret;
@@ -1994,9 +1992,11 @@ static int user_mem_abort(const struct kvm_s2_fault_desc *s2fd)
* only exception to this is when dirty logging is enabled at runtime
* and a write fault needs to collapse a block entry into a table.
*/
- ret = prepare_mmu_memcache(s2fd->vcpu, fault.topup_memcache, &memcache);
- if (ret)
- return ret;
+ if (!perm_fault || (logging_active && kvm_is_write_fault(s2fd->vcpu))) {
+ ret = prepare_mmu_memcache(s2fd->vcpu, true, &memcache);
+ if (ret)
+ return ret;
+ }
/*
* Let's check if we will get back a huge fault->page backed by hugetlbfs, or
--
2.47.3
next prev parent reply other threads:[~2026-03-16 17:55 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-16 17:54 [PATCH 00/17] KVM: arm64: More user_mem_abort() rework Marc Zyngier
2026-03-16 17:54 ` [PATCH 01/17] KVM: arm64: Kill fault->ipa Marc Zyngier
2026-03-17 9:22 ` Fuad Tabba
2026-03-16 17:54 ` [PATCH 02/17] KVM: arm64: Make fault_ipa immutable Marc Zyngier
2026-03-17 9:38 ` Fuad Tabba
2026-03-16 17:54 ` [PATCH 03/17] KVM: arm64: Move fault context to const structure Marc Zyngier
2026-03-17 10:26 ` Fuad Tabba
2026-03-16 17:54 ` [PATCH 04/17] KVM: arm64: Replace fault_is_perm with a helper Marc Zyngier
2026-03-17 10:49 ` Fuad Tabba
2026-03-18 13:43 ` Joey Gouly
2026-03-16 17:54 ` [PATCH 05/17] KVM: arm64: Constrain fault_granule to kvm_s2_fault_map() Marc Zyngier
2026-03-17 11:04 ` Fuad Tabba
2026-03-16 17:54 ` [PATCH 06/17] KVM: arm64: Kill write_fault from kvm_s2_fault Marc Zyngier
2026-03-17 11:20 ` Fuad Tabba
2026-03-16 17:54 ` [PATCH 07/17] KVM: arm64: Kill exec_fault " Marc Zyngier
2026-03-17 11:44 ` Fuad Tabba
2026-03-16 17:54 ` Marc Zyngier [this message]
2026-03-17 12:12 ` [PATCH 08/17] KVM: arm64: Kill topup_memcache " Fuad Tabba
2026-03-17 13:31 ` Marc Zyngier
2026-03-16 17:54 ` [PATCH 09/17] KVM: arm64: Move VMA-related information to kvm_s2_fault_vma_info Marc Zyngier
2026-03-17 12:51 ` Fuad Tabba
2026-03-18 14:22 ` Joey Gouly
2026-03-18 16:14 ` Fuad Tabba
2026-03-21 9:50 ` Marc Zyngier
2026-03-16 17:54 ` [PATCH 10/17] KVM: arm64: Kill logging_active from kvm_s2_fault Marc Zyngier
2026-03-17 13:23 ` Fuad Tabba
2026-03-16 17:54 ` [PATCH 11/17] KVM: arm64: Restrict the scope of the 'writable' attribute Marc Zyngier
2026-03-17 13:55 ` Fuad Tabba
2026-03-16 17:54 ` [PATCH 12/17] KVM: arm64: Move kvm_s2_fault.{pfn,page} to kvm_s2_vma_info Marc Zyngier
2026-03-17 14:24 ` Fuad Tabba
2026-03-16 17:54 ` [PATCH 13/17] KVM: arm64: Replace force_pte with a max_map_size attribute Marc Zyngier
2026-03-17 15:08 ` Fuad Tabba
2026-03-16 17:54 ` [PATCH 14/17] KVM: arm64: Move device mapping management into kvm_s2_fault_pin_pfn() Marc Zyngier
2026-03-17 15:41 ` Fuad Tabba
2026-03-16 17:54 ` [PATCH 15/17] KVM: arm64: Directly expose mapping prot and kill kvm_s2_fault Marc Zyngier
2026-03-17 16:14 ` Fuad Tabba
2026-03-16 17:54 ` [PATCH 16/17] KVM: arm64: Simplify integration of adjust_nested_*_perms() Marc Zyngier
2026-03-17 16:45 ` Fuad Tabba
2026-03-16 17:54 ` [PATCH 17/17] KVM: arm64: Convert gmem_abort() to struct kvm_s2_fault_desc Marc Zyngier
2026-03-17 17:58 ` Fuad Tabba
2026-03-16 19:45 ` [PATCH 00/17] KVM: arm64: More user_mem_abort() rework Fuad Tabba
2026-03-16 20:26 ` Fuad Tabba
2026-03-16 20:33 ` Fuad Tabba
2026-03-17 8:23 ` Marc Zyngier
2026-03-17 17:50 ` Fuad Tabba
2026-03-17 18:02 ` Fuad Tabba
2026-03-17 17:03 ` Suzuki K Poulose
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