From: "Roedel, Joerg" <Joerg.Roedel@amd.com>
To: Avi Kivity <avi@redhat.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>,
Alexander Graf <agraf@suse.de>,
"joro@8bytes.org" <joro@8bytes.org>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 22/27] KVM: MMU: Refactor mmu_alloc_roots function
Date: Wed, 8 Sep 2010 11:16:55 +0200 [thread overview]
Message-ID: <20100908091655.GI2177@amd.com> (raw)
In-Reply-To: <4C87386B.2030109@redhat.com>
On Wed, Sep 08, 2010 at 03:16:59AM -0400, Avi Kivity wrote:
> On 09/07/2010 11:39 PM, Marcelo Tosatti wrote:
> >
> >> @@ -2406,16 +2441,11 @@ static int mmu_alloc_roots(struct kvm_vcpu *vcpu)
> >> root_gfn = pdptr>> PAGE_SHIFT;
> >> if (mmu_check_root(vcpu, root_gfn))
> >> return 1;
> >> - } else if (vcpu->arch.mmu.root_level == 0)
> >> - root_gfn = 0;
> >> - if (vcpu->arch.mmu.direct_map) {
> >> - direct = 1;
> >> - root_gfn = i<< 30;
> >> }
> >> spin_lock(&vcpu->kvm->mmu_lock);
> >> kvm_mmu_free_some_pages(vcpu);
> >> sp = kvm_mmu_get_page(vcpu, root_gfn, i<< 30,
> >> - PT32_ROOT_LEVEL, direct,
> >> + PT32_ROOT_LEVEL, 0,
> >> ACC_ALL, NULL);
> > Should not write protect the gfn for nonpaging mode.
> >
>
> nonpaging mode should have direct_map set, so wouldn't enter this path
> at all.
Hmm, actually the nonpaging path does not set direct_map. I'll fix this
too in v4. Thanks.
Joerg
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Advanced Micro Devices GmbH Einsteinring 24 85609 Dornach
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Registration: Dornach, Landkr. Muenchen; Registerger. Muenchen, HRB Nr. 43632
next prev parent reply other threads:[~2010-09-08 9:19 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-06 15:55 [PATCH 0/27] Nested Paging Virtualization for KVM v3 (now with fixed Cc-List) Joerg Roedel
2010-09-06 15:55 ` [PATCH 01/27] KVM: MMU: Check for root_level instead of long mode Joerg Roedel
2010-09-06 15:55 ` [PATCH 02/27] KVM: MMU: Make tdp_enabled a mmu-context parameter Joerg Roedel
2010-09-06 15:55 ` [PATCH 03/27] KVM: MMU: Make set_cr3 a function pointer in kvm_mmu Joerg Roedel
2010-09-06 15:55 ` [PATCH 04/27] KVM: X86: Introduce a tdp_set_cr3 function Joerg Roedel
2010-09-06 15:55 ` [PATCH 05/27] KVM: MMU: Introduce get_cr3 function pointer Joerg Roedel
2010-09-06 15:55 ` [PATCH 06/27] KVM: MMU: Introduce inject_page_fault " Joerg Roedel
2010-09-06 15:55 ` [PATCH 07/27] KVM: MMU: Introduce kvm_init_shadow_mmu helper function Joerg Roedel
2010-09-06 15:55 ` [PATCH 08/27] KVM: MMU: Let is_rsvd_bits_set take mmu context instead of vcpu Joerg Roedel
2010-09-06 15:55 ` [PATCH 09/27] KVM: MMU: Introduce generic walk_addr function Joerg Roedel
2010-09-06 15:55 ` [PATCH 10/27] KVM: MMU: Add infrastructure for two-level page walker Joerg Roedel
2010-09-06 18:05 ` Avi Kivity
2010-09-08 9:20 ` Roedel, Joerg
2010-09-06 15:55 ` [PATCH 11/27] KVM: X86: Introduce pointer to mmu context used for gva_to_gpa Joerg Roedel
2010-09-06 15:55 ` [PATCH 12/27] KVM: MMU: Implement nested gva_to_gpa functions Joerg Roedel
2010-09-06 15:55 ` [PATCH 13/27] KVM: X86: Add kvm_read_guest_page_tdp function Joerg Roedel
2010-09-06 15:55 ` [PATCH 14/27] KVM: MMU: Make walk_addr_generic capable for two-level walking Joerg Roedel
2010-09-07 17:48 ` Marcelo Tosatti
2010-09-08 9:12 ` Roedel, Joerg
2010-09-06 15:55 ` [PATCH 15/27] KVM: MMU: Introduce kvm_read_guest_page_x86() Joerg Roedel
2010-09-06 15:55 ` [PATCH 16/27] KVM: MMU: Introduce init_kvm_nested_mmu() Joerg Roedel
2010-09-06 15:55 ` [PATCH 17/27] KVM: MMU: Track page fault data in struct vcpu Joerg Roedel
2010-09-06 18:17 ` Avi Kivity
2010-09-06 15:55 ` [PATCH 18/27] KVM: MMU: Propagate the right fault back to the guest after gva_to_gpa Joerg Roedel
2010-09-06 15:55 ` [PATCH 19/27] KVM: X86: Propagate fetch faults Joerg Roedel
2010-09-07 18:43 ` Marcelo Tosatti
2010-09-08 9:18 ` Roedel, Joerg
2010-09-06 15:55 ` [PATCH 20/27] KVM: MMU: Add kvm_mmu parameter to load_pdptrs function Joerg Roedel
2010-09-06 15:56 ` [PATCH 21/27] KVM: MMU: Introduce kvm_pdptr_read_mmu Joerg Roedel
2010-09-06 15:56 ` [PATCH 22/27] KVM: MMU: Refactor mmu_alloc_roots function Joerg Roedel
2010-09-07 20:39 ` Marcelo Tosatti
2010-09-08 7:16 ` Avi Kivity
2010-09-08 9:16 ` Roedel, Joerg [this message]
2010-09-06 15:56 ` [PATCH 23/27] KVM: MMU: Allow long mode shadows for legacy page tables Joerg Roedel
2010-09-06 15:56 ` [PATCH 24/27] KVM: SVM: Implement MMU helper functions for Nested Nested Paging Joerg Roedel
2010-09-06 15:56 ` [PATCH 25/27] KVM: SVM: Initialize Nested Nested MMU context on VMRUN Joerg Roedel
2010-09-06 15:56 ` [PATCH 26/27] KVM: SVM: Expect two more candiates for exit_int_info Joerg Roedel
2010-09-06 15:56 ` [PATCH 27/27] KVM: SVM: Report Nested Paging support to userspace Joerg Roedel
2010-09-06 18:37 ` [PATCH 0/27] Nested Paging Virtualization for KVM v3 (now with fixed Cc-List) Avi Kivity
2010-09-07 16:35 ` Roedel, Joerg
-- strict thread matches above, loose matches on Subject: below --
2010-09-06 15:01 [PATCH 0/27] Nested Paging Virtualization for KVM v3 Joerg Roedel
2010-09-06 15:01 ` [PATCH 22/27] KVM: MMU: Refactor mmu_alloc_roots function Joerg Roedel
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