From: Chao Gao <chao.gao@intel.com>
To: Binbin Wu <binbin.wu@linux.intel.com>
Cc: <kvm@vger.kernel.org>, <seanjc@google.com>, <pbonzini@redhat.com>,
<robert.hu@linux.intel.com>
Subject: Re: [PATCH v5 4/4] x86: Add test case for INVVPID with LAM
Date: Tue, 6 Jun 2023 15:02:51 +0800 [thread overview]
Message-ID: <ZH7aGywSih+TcFyu@chao-email> (raw)
In-Reply-To: <fa4a405f-0ee6-c6de-7947-e56c4ee22734@linux.intel.com>
On Tue, Jun 06, 2023 at 01:47:07PM +0800, Binbin Wu wrote:
>> > + try_invvpid(INVVPID_ADDR, 0xffff, NONCANONICAL);
>> shouldn't we use a kernel address here? e.g., vaddr. otherwise, we
>> cannot tell if there is an error in KVM's emulation because in this
>> test, LAM is enabled only for kernel address while INVVPID_ADDR is a
>> userspace address.
>
>INVVPID_ADDR is the invalidation type, not the address.
>The address used here is NONCANONICAL, which is 0xaaaaaaaaaaaaaaaaull and
>is considered as kernel address.
Yes. Sorry about this misunderstanding.
Do you need the address to be canonical after masking metadata?
next prev parent reply other threads:[~2023-06-06 7:03 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-30 2:43 [PATCH v5 0/4] x86: Add test cases for LAM Binbin Wu
2023-05-30 2:43 ` [PATCH v5 1/4] x86: Allow setting of CR3 LAM bits if LAM supported Binbin Wu
2023-05-30 2:43 ` [PATCH v5 2/4] x86: Add test case for LAM_SUP Binbin Wu
2023-05-30 2:43 ` [PATCH v5 3/4] x86: Add test cases for LAM_{U48,U57} Binbin Wu
2023-05-30 2:43 ` [PATCH v5 4/4] x86: Add test case for INVVPID with LAM Binbin Wu
2023-06-05 13:22 ` Chao Gao
2023-06-06 5:47 ` Binbin Wu
2023-06-06 7:02 ` Chao Gao [this message]
2023-06-06 7:08 ` Binbin Wu
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