From: Vitaly Kuznetsov <vkuznets@redhat.com>
To: Sean Christopherson <seanjc@google.com>
Cc: kvm@vger.kernel.org, Paolo Bonzini <pbonzini@redhat.com>,
Anirudh Rayabharam <anrayabh@linux.microsoft.com>,
Wanpeng Li <wanpengli@tencent.com>,
Jim Mattson <jmattson@google.com>,
Maxim Levitsky <mlevitsk@redhat.com>,
linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v4 24/25] KVM: VMX: Cache MSR_IA32_VMX_MISC in vmcs_config
Date: Tue, 02 Aug 2022 18:11:01 +0200 [thread overview]
Message-ID: <87fsie1v8q.fsf@redhat.com> (raw)
In-Reply-To: <Ytnb2Zc0ANQM+twN@google.com>
Sean Christopherson <seanjc@google.com> writes:
> On Thu, Jul 14, 2022, Vitaly Kuznetsov wrote:
>> @@ -2613,6 +2614,8 @@ static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf,
>> if (((vmx_msr_high >> 18) & 15) != 6)
>> return -EIO;
>>
>> + rdmsrl(MSR_IA32_VMX_MISC, misc_msr);
>
> Might make sense to sanitize fields that KVM doesn't use and that are not exposed
> to L1. Not sure it's worthwhile though as many of the bits fall into a grey area,
> e.g. all the SMM stuff isn't technically used by KVM, but that's largely because
> much of it just isn't relevant to virtualization.
>
> I'm totally ok leaving it as-is, though maybe name it "unsanitized_misc" or so
> to make that obvious?
I couldn't convince myself to add 'unsanitized_' prefix as I don't think
it significantly reduces possible confusion (the quiestion would be
'sanitized for what and in which way?') so a need for 'git grep' seems
imminent anyway. Hope I've addressed the rest of your comments in v5
though, thanks for your review!
--
Vitaly
next prev parent reply other threads:[~2022-08-02 16:14 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-14 9:13 [PATCH v4 00/25] KVM: VMX: Support updated eVMCSv1 revision + use vmcs_config for L1 VMX MSRs Vitaly Kuznetsov
2022-07-14 9:13 ` [PATCH v4 01/25] KVM: x86: hyper-v: Expose access to debug MSRs in the partition privilege flags Vitaly Kuznetsov
2022-07-21 21:43 ` Sean Christopherson
2022-07-22 17:22 ` Paolo Bonzini
2022-08-01 8:16 ` Vitaly Kuznetsov
2022-07-14 9:13 ` [PATCH v4 02/25] x86/hyperv: Fix 'struct hv_enlightened_vmcs' definition Vitaly Kuznetsov
2022-07-14 9:13 ` [PATCH v4 03/25] x86/hyperv: Update " Vitaly Kuznetsov
2022-07-14 9:57 ` Maxim Levitsky
2022-07-14 9:13 ` [PATCH v4 04/25] KVM: VMX: Define VMCS-to-EVMCS conversion for the new fields Vitaly Kuznetsov
2022-07-14 9:13 ` [PATCH v4 05/25] KVM: nVMX: Support several new fields in eVMCSv1 Vitaly Kuznetsov
2022-07-14 9:13 ` [PATCH v4 06/25] KVM: x86: hyper-v: Cache HYPERV_CPUID_NESTED_FEATURES CPUID leaf Vitaly Kuznetsov
2022-07-14 9:59 ` Maxim Levitsky
2022-07-14 9:13 ` [PATCH v4 07/25] KVM: selftests: Add ENCLS_EXITING_BITMAP{,HIGH} VMCS fields Vitaly Kuznetsov
2022-07-14 9:20 ` Kai Huang
2022-07-14 9:13 ` [PATCH v4 08/25] KVM: selftests: Switch to updated eVMCSv1 definition Vitaly Kuznetsov
2022-07-14 10:07 ` Maxim Levitsky
2022-07-14 9:13 ` [PATCH v4 09/25] KVM: VMX: nVMX: Support TSC scaling and PERF_GLOBAL_CTRL with enlightened VMCS Vitaly Kuznetsov
2022-07-21 21:58 ` Sean Christopherson
2022-07-25 17:09 ` Paolo Bonzini
2022-07-25 18:18 ` Sean Christopherson
2022-07-28 21:52 ` Paolo Bonzini
2022-07-28 22:13 ` Sean Christopherson
2022-07-28 22:24 ` Paolo Bonzini
2022-07-28 22:35 ` Sean Christopherson
2022-08-01 8:54 ` Vitaly Kuznetsov
2022-08-02 13:03 ` Vitaly Kuznetsov
2022-07-14 9:13 ` [PATCH v4 10/25] KVM: selftests: Enable TSC scaling in evmcs selftest Vitaly Kuznetsov
2022-07-14 9:13 ` [PATCH v4 11/25] KVM: VMX: Get rid of eVMCS specific VMX controls sanitization Vitaly Kuznetsov
2022-07-14 10:04 ` Maxim Levitsky
2022-07-14 9:13 ` [PATCH v4 12/25] KVM: VMX: Check VM_ENTRY_IA32E_MODE in setup_vmcs_config() Vitaly Kuznetsov
2022-07-21 22:00 ` Sean Christopherson
2022-07-14 9:13 ` [PATCH v4 13/25] KVM: VMX: Check CPU_BASED_{INTR,NMI}_WINDOW_EXITING " Vitaly Kuznetsov
2022-07-21 22:01 ` Sean Christopherson
2022-07-14 9:13 ` [PATCH v4 14/25] KVM: VMX: Tweak the special handling of SECONDARY_EXEC_ENCLS_EXITING " Vitaly Kuznetsov
2022-07-21 22:11 ` Sean Christopherson
2022-08-02 12:52 ` Vitaly Kuznetsov
2022-07-14 9:13 ` [PATCH v4 15/25] KVM: VMX: Extend VMX controls macro shenanigans Vitaly Kuznetsov
2022-07-21 22:28 ` Sean Christopherson
2022-07-22 18:33 ` Sean Christopherson
2022-07-22 21:04 ` Nathan Chancellor
2022-07-22 21:38 ` Sean Christopherson
2022-07-23 1:06 ` Nathan Chancellor
2022-07-28 16:27 ` Paolo Bonzini
2022-07-14 9:13 ` [PATCH v4 16/25] KVM: VMX: Move CPU_BASED_CR8_{LOAD,STORE}_EXITING filtering out of setup_vmcs_config() Vitaly Kuznetsov
2022-07-21 22:30 ` Sean Christopherson
2022-07-14 9:13 ` [PATCH v4 17/25] KVM: VMX: Add missing VMEXIT controls to vmcs_config Vitaly Kuznetsov
2022-07-21 22:34 ` Sean Christopherson
2022-07-14 9:13 ` [PATCH v4 18/25] KVM: VMX: Add missing CPU based VM execution " Vitaly Kuznetsov
2022-07-21 22:39 ` Sean Christopherson
2022-07-14 9:13 ` [PATCH v4 19/25] KVM: VMX: Adjust CR3/INVPLG interception for EPT=y at runtime, not setup Vitaly Kuznetsov
2022-07-14 9:13 ` [PATCH v4 20/25] KVM: x86: VMX: Replace some Intel model numbers with mnemonics Vitaly Kuznetsov
2022-07-14 9:13 ` [PATCH v4 21/25] KVM: VMX: Move LOAD_IA32_PERF_GLOBAL_CTRL errata handling out of setup_vmcs_config() Vitaly Kuznetsov
2022-07-21 22:56 ` Sean Christopherson
2022-07-28 22:25 ` Paolo Bonzini
2022-07-28 22:34 ` Sean Christopherson
2022-07-14 9:13 ` [PATCH v4 22/25] KVM: nVMX: Always set required-1 bits of pinbased_ctls to PIN_BASED_ALWAYSON_WITHOUT_TRUE_MSR Vitaly Kuznetsov
2022-07-14 9:13 ` [PATCH v4 23/25] KVM: nVMX: Use sanitized allowed-1 bits for VMX control MSRs Vitaly Kuznetsov
2022-07-14 9:13 ` [PATCH v4 24/25] KVM: VMX: Cache MSR_IA32_VMX_MISC in vmcs_config Vitaly Kuznetsov
2022-07-21 23:06 ` Sean Christopherson
2022-08-02 16:11 ` Vitaly Kuznetsov [this message]
2022-08-02 16:28 ` Sean Christopherson
2022-07-14 9:13 ` [PATCH v4 25/25] KVM: nVMX: Use cached host MSR_IA32_VMX_MISC value for setting up nested MSR Vitaly Kuznetsov
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=87fsie1v8q.fsf@redhat.com \
--to=vkuznets@redhat.com \
--cc=anrayabh@linux.microsoft.com \
--cc=jmattson@google.com \
--cc=kvm@vger.kernel.org \
--cc=linux-hyperv@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mlevitsk@redhat.com \
--cc=pbonzini@redhat.com \
--cc=seanjc@google.com \
--cc=wanpengli@tencent.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).