From: "Kirill A. Shutemov" <kirill@shutemov.name>
To: Dave Hansen <dave.hansen@intel.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
luto@kernel.org, peterz@infradead.org,
sathyanarayanan.kuppuswamy@linux.intel.com, ak@linux.intel.com,
dan.j.williams@intel.com, david@redhat.com, hpa@zytor.com,
seanjc@google.com, thomas.lendacky@amd.com,
elena.reshetova@intel.com, x86@kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/2] x86/tdx: Extract GET_INFO call from get_cc_mask()
Date: Mon, 31 Oct 2022 07:12:52 +0300 [thread overview]
Message-ID: <20221031041252.mdcjocqn6k4k4gvy@box.shutemov.name> (raw)
In-Reply-To: <20221028235951.p2vdu7drbbf3ccg7@box.shutemov.name>
On Sat, Oct 29, 2022 at 02:59:51AM +0300, Kirill A. Shutemov wrote:
> > Can you please take a look through this and make sure I didn't botch
> > anything:
> >
> > > https://git.kernel.org/pub/scm/linux/kernel/git/daveh/devel.git/log/?h=tdxbadve
> >
> > The end result is about 50 lines less than what was there before. Most
> > of it is comment removal but the code is simpler too.
> >
> > Acks and Tested-by's would be appreciated.
One thing that I must bring up is that it seems that there's no way to get
the panic message to user. I tried to convinced myself that it is qemu
misconfiguration on my part or some race, but no: it is just too early for
earlyprintk.
We only get earlyprintk working after parse_early_options() which happens
well after tdx_early_init().
Moving panic() after earlyprintk working is not good idea as it exposes
kernel more: by the time we already have full #VE handler.
We can move it earlier into decompresser which has different earlyprintk
implementation. Not sure if it worth this. What do you think?
"tdx: Guest detected" printed from the same tdx_early_init() is visible if
boot goes far enough to initialize console (early or not) as printk adds
the message to the buffer, but no so luck for panic().
--
Kiryl Shutsemau / Kirill A. Shutemov
next prev parent reply other threads:[~2022-10-31 4:13 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-28 14:12 [PATCH 0/2] x86/tdx: Enforce no #VE on private memory accesses Kirill A. Shutemov
2022-10-28 14:12 ` [PATCH 1/2] x86/tdx: Extract GET_INFO call from get_cc_mask() Kirill A. Shutemov
2022-10-28 15:43 ` Dave Hansen
2022-10-28 23:27 ` Dave Hansen
2022-10-28 23:59 ` Kirill A. Shutemov
2022-10-31 4:12 ` Kirill A. Shutemov [this message]
2022-10-31 16:42 ` Dave Hansen
2022-10-31 19:19 ` Kirill A. Shutemov
2022-10-31 19:27 ` Andi Kleen
2022-10-31 19:44 ` Dave Hansen
2022-10-31 22:10 ` Kirill A. Shutemov
2022-10-28 14:12 ` [PATCH 2/2] x86/tdx: Do not allow #VE due to EPT violation on the private memory Kirill A. Shutemov
2022-10-28 15:41 ` Dave Hansen
2022-10-31 4:07 ` Guorui Yu
2022-10-31 4:33 ` Kirill A. Shutemov
2022-10-31 14:22 ` Dave Hansen
2022-11-04 22:36 ` Erdem Aktas
2022-11-04 22:50 ` Dave Hansen
2022-11-07 22:53 ` Erdem Aktas
2022-11-07 23:30 ` Dave Hansen
2022-11-07 5:10 ` Guorui Yu
2022-11-07 13:31 ` Dave Hansen
2022-11-07 13:43 ` Guorui Yu
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=20221031041252.mdcjocqn6k4k4gvy@box.shutemov.name \
--to=kirill@shutemov.name \
--cc=ak@linux.intel.com \
--cc=bp@alien8.de \
--cc=dan.j.williams@intel.com \
--cc=dave.hansen@intel.com \
--cc=david@redhat.com \
--cc=elena.reshetova@intel.com \
--cc=hpa@zytor.com \
--cc=kirill.shutemov@linux.intel.com \
--cc=linux-kernel@vger.kernel.org \
--cc=luto@kernel.org \
--cc=mingo@redhat.com \
--cc=peterz@infradead.org \
--cc=sathyanarayanan.kuppuswamy@linux.intel.com \
--cc=seanjc@google.com \
--cc=tglx@linutronix.de \
--cc=thomas.lendacky@amd.com \
--cc=x86@kernel.org \
/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).