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From: Paolo Bonzini <pbonzini@redhat.com>
To: Dave Hansen <dave.hansen@intel.com>, Kai Huang <kai.huang@intel.com>
Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
	x86@kernel.org, linux-sgx@vger.kernel.org, jarkko@kernel.org,
	dave.hansen@linux.intel.com, yang.zhong@intel.com
Subject: Re: [PATCH 2/2] x86: sgx_vepc: implement SGX_IOC_VEPC_REMOVE_ALL ioctl
Date: Tue, 21 Sep 2021 12:29:02 +0200	[thread overview]
Message-ID: <c69d1eca-0175-0bbd-8902-1f7f380a1159@redhat.com> (raw)
In-Reply-To: <4db02f44-fec0-b78e-b9ae-0aa41ac7819f@intel.com>

On 21/09/21 01:09, Dave Hansen wrote:
>> Maybe also worth to mention userspace should guarantee there's no vcpu running
>> inside guest enclave when resetting guest's virtual EPC.
> Why, specifically?
> 
> Is it because EREMOVE will also fail if there is a CPU running in the
> enclave?

Yes, and SGX_ENCLAVE_ACT would cause a WARN.  Good catch, Kai, I'll fix it.

Paolo


      reply	other threads:[~2021-09-21 10:29 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-20 12:53 [PATCH 0/2] x86: sgx_vepc: implement ioctl to EREMOVE all pages Paolo Bonzini
2021-09-20 12:54 ` [PATCH 1/2] x86: sgx_vepc: extract sgx_vepc_remove_page Paolo Bonzini
2021-09-21 19:44   ` Jarkko Sakkinen
2021-09-21 19:46     ` Jarkko Sakkinen
2021-09-23 12:08     ` Paolo Bonzini
2021-09-23 20:33       ` Jarkko Sakkinen
2021-09-20 12:54 ` [PATCH 2/2] x86: sgx_vepc: implement SGX_IOC_VEPC_REMOVE_ALL ioctl Paolo Bonzini
2021-09-20 22:17   ` Kai Huang
2021-09-20 23:09     ` Dave Hansen
2021-09-21 10:29       ` Paolo Bonzini [this message]

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