From: Yang Weijiang <weijiang.yang@intel.com>
To: Sean Christopherson <sean.j.christopherson@intel.com>
Cc: Yang Weijiang <weijiang.yang@intel.com>,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
pbonzini@redhat.com, jmattson@google.com,
yu.c.zhang@linux.intel.com, alazar@bitdefender.com,
edwin.zhai@intel.com
Subject: Re: [RESEND PATCH v10 05/10] x86: spp: Introduce user-space SPP IOCTLs
Date: Mon, 13 Jan 2020 16:21:32 +0800 [thread overview]
Message-ID: <20200113082132.GG12253@local-michael-cet-test.sh.intel.com> (raw)
In-Reply-To: <20200110181053.GH21485@linux.intel.com>
On Fri, Jan 10, 2020 at 10:10:53AM -0800, Sean Christopherson wrote:
> On Thu, Jan 02, 2020 at 02:13:14PM +0800, Yang Weijiang wrote:
> > User application, e.g., QEMU or VMI, must initialize SPP
> > before gets/sets SPP subpages, the dynamic initialization is to
> > reduce the extra storage cost if the SPP feature is not not used.
> >
> > Co-developed-by: He Chen <he.chen@linux.intel.com>
> > Signed-off-by: He Chen <he.chen@linux.intel.com>
> > Co-developed-by: Zhang Yi <yi.z.zhang@linux.intel.com>
> > Signed-off-by: Zhang Yi <yi.z.zhang@linux.intel.com>
> > Signed-off-by: Yang Weijiang <weijiang.yang@intel.com>
> > ---
> > arch/x86/include/asm/kvm_host.h | 4 ++
> > arch/x86/kvm/mmu/spp.c | 44 +++++++++++++++
> > arch/x86/kvm/mmu/spp.h | 9 ++++
> > arch/x86/kvm/vmx/vmx.c | 15 ++++++
> > arch/x86/kvm/x86.c | 95 ++++++++++++++++++++++++++++++++-
> > include/uapi/linux/kvm.h | 3 ++
> > 6 files changed, 169 insertions(+), 1 deletion(-)
> >
> > diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
> > index f5145b86d620..c7a9f03f39a7 100644
> > --- a/arch/x86/include/asm/kvm_host.h
> > +++ b/arch/x86/include/asm/kvm_host.h
> > @@ -1238,6 +1238,10 @@ struct kvm_x86_ops {
> >
> > bool (*apic_init_signal_blocked)(struct kvm_vcpu *vcpu);
> > int (*enable_direct_tlbflush)(struct kvm_vcpu *vcpu);
> > +
> > + int (*init_spp)(struct kvm *kvm);
> > + int (*flush_subpages)(struct kvm *kvm, u64 gfn, u32 npages);
> > + int (*get_inst_len)(struct kvm_vcpu *vcpu);
>
> If this is necessary, which hopefully it isn't, then get_insn_len() to be
> consistent with other KVM nomenclature.
>
Yep, will change it.
> A comment for the series overall, it needs a lot of work to properly order
> code between patches. E.g. this patch introduces get_inst_len() without
> any justification in the changelog and without a user. At best it's
> confusing, at worst this series will be impossible to bisect.
I'll double check the patch and add more comments on some confusing
points. Meanwhile, will re-order some code to make the serial testable,
thanks a lot for your careful review!
next prev parent reply other threads:[~2020-01-13 8:17 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-02 6:13 [RESEND PATCH v10 00/10] Enable Sub-Page Write Protection Support Yang Weijiang
2020-01-02 6:13 ` [RESEND PATCH v10 01/10] Documentation: Add EPT based Subpage Protection and related APIs Yang Weijiang
2020-01-02 6:13 ` [RESEND PATCH v10 02/10] vmx: spp: Add control flags for Sub-Page Protection(SPP) Yang Weijiang
2020-01-10 16:58 ` Sean Christopherson
2020-01-13 5:44 ` Yang Weijiang
2020-01-02 6:13 ` [RESEND PATCH v10 03/10] mmu: spp: Add SPP Table setup functions Yang Weijiang
2020-01-10 17:26 ` Sean Christopherson
2020-01-13 6:00 ` Yang Weijiang
2020-01-10 17:40 ` Sean Christopherson
2020-01-13 6:04 ` Yang Weijiang
2020-01-02 6:13 ` [RESEND PATCH v10 04/10] mmu: spp: Add functions to operate SPP access bitmap Yang Weijiang
2020-01-10 17:38 ` Sean Christopherson
2020-01-13 6:15 ` Yang Weijiang
2020-01-02 6:13 ` [RESEND PATCH v10 05/10] x86: spp: Introduce user-space SPP IOCTLs Yang Weijiang
2020-01-10 18:10 ` Sean Christopherson
2020-01-13 8:21 ` Yang Weijiang [this message]
2020-01-02 6:13 ` [RESEND PATCH v10 06/10] vmx: spp: Set up SPP paging table at vmentry/vmexit Yang Weijiang
2020-01-10 17:55 ` Sean Christopherson
2020-01-13 6:50 ` Yang Weijiang
2020-01-21 14:01 ` Paolo Bonzini
2020-01-10 18:04 ` Sean Christopherson
2020-01-13 8:10 ` Yang Weijiang
2020-01-13 17:33 ` Sean Christopherson
2020-01-13 18:55 ` Adalbert Lazăr
2020-01-13 21:47 ` Sean Christopherson
2020-01-14 3:08 ` Yang Weijiang
2020-01-14 18:58 ` Sean Christopherson
2020-01-15 1:36 ` Yang Weijiang
2020-01-21 14:14 ` Paolo Bonzini
2020-01-02 6:13 ` [RESEND PATCH v10 07/10] mmu: spp: Enable Lazy mode SPP protection Yang Weijiang
2020-01-02 6:13 ` [RESEND PATCH v10 08/10] mmu: spp: Handle SPP protected pages when VM memory changes Yang Weijiang
2020-01-02 6:13 ` [RESEND PATCH v10 09/10] x86: spp: Add SPP protection check in emulation Yang Weijiang
2020-01-02 6:13 ` [RESEND PATCH v10 10/10] kvm: selftests: selftest for Sub-Page protection Yang Weijiang
-- strict thread matches above, loose matches on Subject: below --
2020-01-02 5:18 [RESEND PATCH v10 00/10] Enable Sub-Page Write Protection Support Yang Weijiang
2020-01-02 5:18 ` [RESEND PATCH v10 05/10] x86: spp: Introduce user-space SPP IOCTLs Yang Weijiang
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