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From: Paolo Bonzini <pbonzini@redhat.com>
To: Michael Roth <michael.roth@amd.com>, linux-kselftest@vger.kernel.org
Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
	x86@kernel.org, Nathan Tempelman <natet@google.com>,
	Marc Orr <marcorr@google.com>,
	Steve Rutherford <srutherford@google.com>,
	Sean Christopherson <seanjc@google.com>,
	Mingwei Zhang <mizhang@google.com>,
	Brijesh Singh <brijesh.singh@amd.com>,
	Tom Lendacky <thomas.lendacky@amd.com>,
	Varad Gautam <varad.gautam@suse.com>,
	Shuah Khan <shuah@kernel.org>,
	Vitaly Kuznetsov <vkuznets@redhat.com>,
	David Woodhouse <dwmw@amazon.co.uk>,
	Ricardo Koller <ricarkol@google.com>,
	Jim Mattson <jmattson@google.com>,
	Wanpeng Li <wanpengli@tencent.com>,
	Joerg Roedel <joro@8bytes.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	"H . Peter Anvin" <hpa@zytor.com>
Subject: Re: [RFC 06/16] KVM: selftests: add library for creating/interacting with SEV guests
Date: Thu, 21 Oct 2021 17:39:34 +0200	[thread overview]
Message-ID: <80a69f94-23ca-3ca9-4c77-14e09683dc7d@redhat.com> (raw)
In-Reply-To: <20211006203710.13326-1-michael.roth@amd.com>

On 06/10/21 22:37, Michael Roth wrote:
> +struct sev_sync_data {
> +	uint32_t token;
> +	bool pending;
> +	bool done;
> +	bool aborted;
> +	uint64_t info;
> +};
> +

Please add a comment explaining roughly the design and what the fields 
are for.  Maybe the bools can be replaced by an enum { DONE, ABORT, 
SYNC, RUNNING } (running is for pending==false)?

Also, for the part that you can feel free to ignore: this seems to be 
similar to the ucall mechanism.  Is it possible to implement the ucall 
interface in terms of this one (or vice versa)?

One idea could be to:

- move ucall to the main lib/ directory

- make it use a struct of function pointers, whose default 
implementation would be in the existing lib/ARCH/ucall.c files

- add a function to register the struct for the desired implementation

- make sev.c register its own implementation

Thanks,

Paolo


  parent reply	other threads:[~2021-10-21 15:39 UTC|newest]

Thread overview: 57+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-05 23:44 [RFC 00/16] KVM: selftests: Add tests for SEV, SEV-ES, and SEV-SNP guests Michael Roth
2021-10-05 23:44 ` [RFC 01/16] KVM: selftests: move vm_phy_pages_alloc() earlier in file Michael Roth
2021-10-18 15:00   ` Mingwei Zhang
2021-10-21  3:45     ` Michael Roth
2021-10-21 15:20       ` Paolo Bonzini
2021-10-26 15:52       ` Mingwei Zhang
2021-11-01 17:43         ` Mingwei Zhang
2021-10-05 23:44 ` [RFC 02/16] KVM: selftests: add hooks for managing encrypted guest memory Michael Roth
2021-10-13  2:20   ` Krish Sadhukhan
2021-10-13 15:07     ` Michael Roth
2021-10-21 15:22       ` Paolo Bonzini
2021-10-18 15:00   ` Mingwei Zhang
2021-10-21  3:37     ` Michael Roth
2021-10-21 15:22       ` Paolo Bonzini
2021-10-26 15:48       ` Mingwei Zhang
2021-11-01 17:44         ` Mingwei Zhang
2021-10-05 23:44 ` [RFC 03/16] KVM: selftests: handle encryption bits in page tables Michael Roth
2021-10-21 15:26   ` Paolo Bonzini
2021-10-24 16:49     ` Michael Roth
2021-10-25  7:34       ` Paolo Bonzini
2021-10-25 14:14         ` Michael Roth
2021-10-05 23:44 ` [RFC 09/16] KVM: selftests: account for error code in #VC exception frame Michael Roth
2021-10-05 23:44 ` [RFC 10/16] KVM: selftests: add support for creating SEV-ES guests Michael Roth
2021-10-05 23:44 ` [RFC 11/16] KVM: selftests: add library for handling SEV-ES-related exits Michael Roth
2021-10-05 23:44 ` [RFC 12/16] KVM: selftests: add SEV-ES boot tests Michael Roth
2021-10-05 23:44 ` [RFC 13/16] KVM: selftests: add support for creating SEV-SNP guests Michael Roth
2021-10-05 23:44 ` [RFC 14/16] KVM: selftests: add helpers for SEV-SNP-related instructions/exits Michael Roth
2021-10-05 23:44 ` [RFC 15/16] KVM: selftests: add SEV-SNP boot tests Michael Roth
2021-10-05 23:44 ` [RFC 16/16] KVM: selftests: add SEV-SNP tests for page-state changes Michael Roth
2021-10-06 20:28 ` [RFC 04/16] KVM: selftests: add library for creating/interacting with SEV guests Michael Roth
2021-10-06 20:59   ` Michael Roth
2021-10-06 20:36 ` [RFC 04/16] KVM: selftests: set CPUID before setting sregs in vcpu creation Michael Roth
2021-10-08 19:03   ` Nathan Tempelman
2021-10-13  1:45   ` Krish Sadhukhan
2021-10-13 15:05     ` Michael Roth
2021-10-21 15:29   ` Paolo Bonzini
2021-10-06 20:36 ` [RFC 05/16] KVM: selftests: add support for encrypted vm_vaddr_* allocations Michael Roth
2021-10-06 20:37 ` [RFC 06/16] KVM: selftests: add library for creating/interacting with SEV guests Michael Roth
2021-10-11  3:17   ` Marc Orr
2021-10-12  1:15     ` Michael Roth
2021-10-12 12:55       ` Michael Roth
2021-10-21 15:43         ` Paolo Bonzini
2021-11-04  5:25       ` Mingwei Zhang
2021-11-04 13:44         ` Tom Lendacky
2021-10-14  1:26   ` Krish Sadhukhan
2021-10-16  2:56   ` Krish Sadhukhan
2021-10-21 15:39   ` Paolo Bonzini [this message]
2021-10-25  3:58     ` Michael Roth
2021-10-06 20:37 ` [RFC 07/16] KVM: selftests: add SEV boot tests Michael Roth
2021-10-16  2:55   ` Krish Sadhukhan
2021-10-21  3:35     ` Michael Roth
2021-10-06 20:37 ` [RFC 08/16] KVM: SVM: include CR3 in initial VMSA state for SEV-ES guests Michael Roth
2021-10-21 16:43   ` Paolo Bonzini
2021-10-25  3:59     ` Michael Roth
2021-10-21 16:48 ` [RFC 00/16] KVM: selftests: Add tests for SEV, SEV-ES, and SEV-SNP guests Paolo Bonzini
2021-10-25  4:27   ` Michael Roth
2021-10-25  7:35     ` Paolo Bonzini

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