From: David Laight <David.Laight@ACULAB.COM>
To: 'Jan Kiszka' <jan.kiszka@siemens.com>,
Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>,
"tglx@linutronix.de" <tglx@linutronix.de>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"hch@infradead.org" <hch@infradead.org>,
"sean.j.christopherson@intel.com"
<sean.j.christopherson@intel.com>,
"mingo@redhat.com" <mingo@redhat.com>,
"bp@alien8.de" <bp@alien8.de>, "hpa@zytor.com" <hpa@zytor.com>,
"x86@kernel.org" <x86@kernel.org>,
"kenny@panix.com" <kenny@panix.com>,
"jeyu@kernel.org" <jeyu@kernel.org>,
"rasmus.villemoes@prevas.dk" <rasmus.villemoes@prevas.dk>,
"pbonzini@redhat.com" <pbonzini@redhat.com>,
"fenghua.yu@intel.com" <fenghua.yu@intel.com>,
"xiaoyao.li@intel.com" <xiaoyao.li@intel.com>,
"nadav.amit@gmail.com" <nadav.amit@gmail.com>,
"thellstrom@vmware.com" <thellstrom@vmware.com>,
"tony.luck@intel.com" <tony.luck@intel.com>,
"gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>,
"jannh@google.com" <jannh@google.com>,
"keescook@chromium.org" <keescook@chromium.org>,
"dcovelli@vmware.com" <dcovelli@vmware.com>,
"mhiramat@kernel.org" <mhiramat@kernel.org>,
Wolfgang Mauerer <wolfgang.mauerer@oth-regensburg.de>
Subject: RE: [PATCH 4/4] x86,module: Detect CRn and DRn manipulation
Date: Wed, 8 Apr 2020 11:17:43 +0000 [thread overview]
Message-ID: <f42d25409c8642d9beced75f3c314452@AcuMS.aculab.com> (raw)
In-Reply-To: <c51317cf-2026-22f8-6763-b3efd2c661d7@siemens.com>
From: Jan Kiszka
> Sent: 08 April 2020 12:13
>
> On 08.04.20 11:25, David Laight wrote:
> > From: Jan Kiszka
> >> Sent: 08 April 2020 09:59
> > ...
> >> At the risk of cutting our own branch off: That's not the firmware
> >> loader, it's ioremap with PAGE_KERNEL_EXEC.
> >
> > You could link the 'blob' into the .text part of a normal
> > kernel module and then load that.
>
> Sure, also possible. Was just more convenient so far to replace the
> hypervisor binary without having to recompile the driver module.
I was thinking of a separate module that contained nothing else.
If it depended on the driver it's 'init' function could call back
into the driver code to pass an entrypoint array (etc).
You can easily to a version check at that point as well.
David
-
Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK
Registration No: 1397386 (Wales)
next prev parent reply other threads:[~2020-04-08 11:17 UTC|newest]
Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-07 11:02 [PATCH 0/4] x86/module: Out-of-tree module decode and sanitize Peter Zijlstra
2020-04-07 11:02 ` [PATCH 1/4] module: Expose load_info to arch module loader code Peter Zijlstra
2020-04-07 16:52 ` Kees Cook
2020-04-07 11:02 ` [PATCH 2/4] module: Convert module_finalize() to load_info Peter Zijlstra
2020-04-07 16:53 ` Kees Cook
2020-04-07 11:02 ` [PATCH 3/4] x86,module: Detect VMX vs SLD conflicts Peter Zijlstra
2020-04-07 14:35 ` Greg KH
2020-04-07 14:44 ` Paolo Bonzini
2020-04-07 14:55 ` Greg KH
2020-04-07 14:49 ` Steven Rostedt
2020-04-07 15:24 ` Peter Zijlstra
2020-04-07 15:28 ` Paolo Bonzini
2020-04-07 15:44 ` Greg KH
2020-04-07 16:51 ` Masami Hiramatsu
2020-04-07 17:16 ` Andrew Cooper
2020-04-07 23:59 ` Masami Hiramatsu
2020-04-08 7:25 ` Masami Hiramatsu
2020-04-07 18:26 ` kbuild test robot
2020-04-07 21:25 ` David Laight
2020-04-07 23:15 ` Kees Cook
2020-04-08 2:10 ` Xiaoyao Li
2020-04-08 8:09 ` Masami Hiramatsu
2020-04-08 9:56 ` Peter Zijlstra
2020-04-08 10:15 ` Andrew Cooper
2020-04-10 11:25 ` Masami Hiramatsu
2020-04-07 11:02 ` [PATCH 4/4] x86,module: Detect CRn and DRn manipulation Peter Zijlstra
2020-04-07 17:01 ` Kees Cook
2020-04-07 18:13 ` Peter Zijlstra
2020-04-07 18:49 ` Kees Cook
2020-04-07 18:55 ` Nadav Amit
2020-04-07 19:38 ` Peter Zijlstra
2020-04-07 20:27 ` Nadav Amit
2020-04-07 20:50 ` Peter Zijlstra
2020-04-07 21:22 ` Nadav Amit
2020-04-07 21:27 ` Peter Zijlstra
2020-04-07 22:12 ` Paolo Bonzini
2020-04-07 23:51 ` Nadav Amit
2020-04-08 8:45 ` Peter Zijlstra
2020-04-08 5:18 ` Christoph Hellwig
2020-04-07 23:15 ` Andrew Cooper
2020-04-08 0:22 ` Paolo Bonzini
2020-04-08 8:37 ` Peter Zijlstra
2020-04-08 9:52 ` Andrew Cooper
2020-04-07 21:48 ` Steven Rostedt
2020-04-08 5:58 ` Jan Kiszka
2020-04-08 8:03 ` Paolo Bonzini
2020-04-08 8:58 ` Jan Kiszka
2020-04-08 9:04 ` Paolo Bonzini
2020-04-08 10:45 ` Jan Kiszka
2020-04-08 8:51 ` Peter Zijlstra
2020-04-08 8:59 ` Jan Kiszka
2020-04-08 9:25 ` David Laight
2020-04-08 11:13 ` Jan Kiszka
2020-04-08 11:17 ` David Laight [this message]
2020-04-08 9:13 ` Peter Zijlstra
2020-04-08 10:50 ` Jan Kiszka
2020-04-08 13:27 ` Steven Rostedt
2020-04-08 15:44 ` Peter Zijlstra
2020-04-08 15:46 ` Christoph Hellwig
2020-04-08 16:02 ` Sean Christopherson
2020-04-08 16:15 ` Paolo Bonzini
2020-04-09 8:56 ` Peter Zijlstra
2020-04-09 10:13 ` Nadav Amit
2020-04-09 21:13 ` Thomas Gleixner
2020-04-09 22:18 ` Steven Rostedt
2020-04-10 5:37 ` Nadav Amit
2020-04-08 15:54 ` Jessica Yu
2020-04-07 17:23 ` [PATCH 0/4] x86/module: Out-of-tree module decode and sanitize Andrew Cooper
2020-04-07 19:41 ` Peter Zijlstra
2020-04-07 20:11 ` Andrew Cooper
2020-04-07 20:45 ` Peter Zijlstra
2020-04-07 21:21 ` Andrew Cooper
2020-04-07 20:21 ` Andrew Cooper
2020-04-07 20:48 ` Peter Zijlstra
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