From: Keqian Zhu <zhukeqian1@huawei.com>
To: <linux-kernel@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<kvmarm@lists.cs.columbia.edu>, <kvm@vger.kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>,
Marc Zyngier <maz@kernel.org>, James Morse <james.morse@arm.com>,
Will Deacon <will@kernel.org>,
"Suzuki K Poulose" <suzuki.poulose@arm.com>,
Sean Christopherson <sean.j.christopherson@intel.com>,
Julien Thierry <julien.thierry.kdev@gmail.com>,
Mark Brown <broonie@kernel.org>,
"Thomas Gleixner" <tglx@linutronix.de>,
Andrew Morton <akpm@linux-foundation.org>,
Alexios Zavras <alexios.zavras@intel.com>,
<liangpeng10@huawei.com>, <zhengxiang9@huawei.com>,
<wanghaibin.wang@huawei.com>, Keqian Zhu <zhukeqian1@huawei.com>
Subject: [PATCH 11/12] KVM: arm64: Support disable hw dirty log after enable
Date: Tue, 16 Jun 2020 17:35:52 +0800 [thread overview]
Message-ID: <20200616093553.27512-12-zhukeqian1@huawei.com> (raw)
In-Reply-To: <20200616093553.27512-1-zhukeqian1@huawei.com>
We should clear DBM bit of all PTEs and flush TLB, then sync dirty log,
which promise we won't miss any dirty status set by hardware.
Signed-off-by: Keqian Zhu <zhukeqian1@huawei.com>
---
arch/arm64/kvm/arm.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index 92f0b40a30fa..76cab4c0b5a6 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -93,6 +93,12 @@ int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
r = -EINVAL;
} else {
r = 0;
+ if (kvm->arch.hw_dirty_log && !cap->args[0]) {
+ mutex_lock(&kvm->slots_lock);
+ kvm_mmu_clear_dbm_all(kvm);
+ kvm_mmu_sync_dirty_log_all(kvm);
+ mutex_unlock(&kvm->slots_lock);
+ }
kvm->arch.hw_dirty_log = cap->args[0];
}
break;
--
2.19.1
next prev parent reply other threads:[~2020-06-16 9:36 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-16 9:35 [PATCH 00/12] KVM: arm64: Support stage2 hardware DBM Keqian Zhu
2020-06-16 9:35 ` [PATCH 01/12] KVM: arm64: Add some basic functions to support hw DBM Keqian Zhu
2020-06-16 9:35 ` [PATCH 02/12] KVM: arm64: Modify stage2 young mechanism " Keqian Zhu
2020-06-16 9:35 ` [PATCH 03/12] KVM: arm64: Report hardware dirty status of stage2 PTE if coverred Keqian Zhu
2020-07-01 11:28 ` Steven Price
2020-07-02 11:28 ` zhukeqian
2020-06-16 9:35 ` [PATCH 04/12] KVM: arm64: Support clear DBM bit for PTEs Keqian Zhu
2020-06-16 9:35 ` [PATCH 05/12] KVM: arm64: Add KVM_CAP_ARM_HW_DIRTY_LOG capability Keqian Zhu
2020-06-16 9:35 ` [PATCH 06/12] KVM: arm64: Set DBM bit of PTEs during write protecting Keqian Zhu
2020-06-16 9:35 ` [PATCH 07/12] KVM: arm64: Scan PTEs to sync dirty log Keqian Zhu
2020-06-16 9:35 ` [PATCH 08/12] KVM: Omit dirty log sync in log clear if initially all set Keqian Zhu
2020-06-16 9:35 ` [PATCH 09/12] KVM: arm64: Steply write protect page table by mask bit Keqian Zhu
2020-06-16 9:35 ` [PATCH 10/12] KVM: arm64: Save stage2 PTE dirty status if it is coverred Keqian Zhu
2020-06-16 9:35 ` Keqian Zhu [this message]
2020-06-16 9:35 ` [PATCH 12/12] KVM: arm64: Enable stage2 hardware DBM Keqian Zhu
2020-06-18 4:13 ` [PATCH 00/12] KVM: arm64: Support " zhukeqian
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