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From: Paolo Bonzini <pbonzini@redhat.com>
To: Sean Christopherson <sean.j.christopherson@intel.com>,
	Yang Weijiang <weijiang.yang@intel.com>
Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
	jmattson@google.com, yu.c.zhang@linux.intel.com
Subject: Re: [PATCH v11 2/9] KVM: VMX: Set guest CET MSRs per KVM and host configuration
Date: Sat, 25 Apr 2020 15:26:30 +0200	[thread overview]
Message-ID: <d92b9fea-95b6-73ce-c3b5-47dad95c5d42@redhat.com> (raw)
In-Reply-To: <20200423162749.GG17824@linux.intel.com>

On 23/04/20 18:27, Sean Christopherson wrote:
>>  
>> +static bool is_cet_mode_allowed(struct kvm_vcpu *vcpu, u32 mode_mask)
> CET itself isn't a mode.  And since this ends up being an inner helper for
> is_cet_supported(), I think __is_cet_supported() would be the way to go.
> 
> Even @mode_mask is a bit confusing without the context of it being kernel
> vs. user.  The callers are very readable, e.g. I'd much prefer passing the
> mask as opposed to doing 'bool kernel'.  Maybe s/mode_mask/cet_mask?  That
> doesn't exactly make things super clear, but at least the reader knows the
> mask is for CET features.

What about is_cet_state_supported and xss_states?

Paolo

>> +{
>> +	return ((supported_xss & mode_mask) &&
>> +		(guest_cpuid_has(vcpu, X86_FEATURE_SHSTK) ||
>> +		guest_cpuid_has(vcpu, X86_FEATURE_IBT)));
>> +}


  parent reply	other threads:[~2020-04-25 13:26 UTC|newest]

Thread overview: 57+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-26  8:18 [PATCH v11 0/9] Introduce support for guest CET feature Yang Weijiang
2020-03-26  8:18 ` [PATCH v11 1/9] KVM: VMX: Introduce CET VMX fields and flags Yang Weijiang
2020-04-23 16:07   ` Sean Christopherson
2020-04-24 13:39     ` Yang Weijiang
2020-04-23 16:39   ` Sean Christopherson
2020-04-24 13:44     ` Yang Weijiang
2020-03-26  8:18 ` [PATCH v11 2/9] KVM: VMX: Set guest CET MSRs per KVM and host configuration Yang Weijiang
2020-04-23 16:27   ` Sean Christopherson
2020-04-24 14:07     ` Yang Weijiang
2020-04-24 14:55       ` Sean Christopherson
2020-04-25  9:14         ` Yang Weijiang
2020-04-25 13:26     ` Paolo Bonzini [this message]
2020-04-26 15:26       ` Yang Weijiang
2020-03-26  8:18 ` [PATCH v11 3/9] KVM: VMX: Set host/guest CET states for vmexit/vmentry Yang Weijiang
2020-04-01  2:23   ` kbuild test robot
2020-04-23 17:17   ` Sean Christopherson
2020-04-24 14:35     ` Yang Weijiang
2020-04-24 14:49       ` Sean Christopherson
2020-04-25  9:20         ` Yang Weijiang
2020-04-27 17:04           ` Sean Christopherson
2020-04-27 17:56             ` Sean Christopherson
2020-03-26  8:18 ` [PATCH v11 4/9] KVM: VMX: Check CET dependencies on CR settings Yang Weijiang
2020-04-23 17:20   ` Sean Christopherson
2020-04-24 14:36     ` Yang Weijiang
2020-03-26  8:18 ` [PATCH v11 5/9] KVM: X86: Refresh CPUID once guest XSS MSR changes Yang Weijiang
2020-04-01  3:50   ` kbuild test robot
2020-04-23 17:34   ` Sean Christopherson
2020-04-24 14:47     ` Yang Weijiang
2020-04-25 13:19     ` Paolo Bonzini
2020-04-26 15:01       ` Yang Weijiang
2020-03-26  8:18 ` [PATCH v11 6/9] KVM: X86: Load guest fpu state when access MSRs managed by XSAVES Yang Weijiang
2020-03-26  8:18 ` [PATCH v11 7/9] KVM: X86: Add userspace access interface for CET MSRs Yang Weijiang
2020-03-28  7:40   ` kbuild test robot
2020-04-01  4:54   ` kbuild test robot
2020-04-23 18:14   ` Sean Christopherson
2020-04-24 15:02     ` Yang Weijiang
2020-04-24 15:10       ` Sean Christopherson
2020-04-25  9:28         ` Yang Weijiang
2020-04-25 15:31   ` Paolo Bonzini
2020-04-26 15:23     ` Yang Weijiang
2020-04-27 14:04       ` Paolo Bonzini
2020-04-28 13:41         ` Yang Weijiang
2020-03-26  8:18 ` [PATCH v11 8/9] KVM: VMX: Enable CET support for nested VM Yang Weijiang
2020-04-01  6:11   ` kbuild test robot
2020-04-23 18:29   ` Sean Christopherson
2020-04-24 15:24     ` Yang Weijiang
2020-03-26  8:18 ` [PATCH v11 9/9] KVM: X86: Set CET feature bits for CPUID enumeration Yang Weijiang
2020-03-27  4:41   ` kbuild test robot
2020-04-23 16:56   ` Sean Christopherson
2020-04-24 14:17     ` Yang Weijiang
2020-04-23 16:58   ` Sean Christopherson
2020-04-24 14:23     ` Yang Weijiang
2020-03-26  8:18 ` [kvm-unit-tests PATCH] x86: Add tests for user-mode CET Yang Weijiang
2020-04-23 15:51 ` [PATCH v11 0/9] Introduce support for guest CET feature Sean Christopherson
2020-04-24 13:31   ` Yang Weijiang
2020-04-23 16:03 ` Sean Christopherson
2020-04-24 13:34   ` Yang Weijiang

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