Re: WARNING: CPU: 1 PID: 83 at arch/x86/kernel/cpu/sgx/main.c:446 ksgxd+0x1b7/0x1d0

[Paul Menzel]

Dear Haitao,


Thank you for your reply. Just for the record:

Am 25.08.22 um 04:12 schrieb Haitao Huang:

> On Tue, 23 Aug 2022 08:48:52 -0500, Paul Menzel wrote:

> > Am 20.08.22 um 08:13 schrieb Paul Menzel:
> >
> > > Am 19.08.22 um 20:28 schrieb Dave Hansen:
> > > > On 8/19/22 09:02, Paul Menzel wrote:
> > > > > On the Dell XPS 13 9370, Linux 5.18.16 prints the warning below:
> > > > >
> > > > > ```
> > > > > [    0.000000] Linux version 5.18.0-4-amd64 (debian-kernel@xxxxxxxxxxxxxxxx) (gcc-11 (Debian 11.3.0-5) 11.3.0, GNU ld (GNU Binutils for Debian) 2.38.90.20220713) #1 SMP PREEMPT_DYNAMIC Debian 5.18.16-1 (2022-08-10)
> > > > > [    0.000000] Command line: BOOT_IMAGE=/vmlinuz-5.18.0-4-amd64 root=UUID=56f398e0-1e25-4fda-aa9f-611dece4b333 ro quiet
> > > > > […]
> > > > > [    0.000000] DMI: Dell Inc. XPS 13 9370/0RMYH9, BIOS 1.21.0 07/06/2022
> > > > > […]
> > > > > [    0.235418] sgx: EPC section 0x40200000-0x45f7ffff
> > >
> > > > Would you be able to send the entire dmesg, along with:
> > >  The log message are attached to the first message, where I missed to 
> > > carbon-copy linux-sgx@ [1].
> > >
> > > >     cat /proc/iomem # (as root)
> > > > and
> > > >     cpuid -1 --raw
> > >  I am going to provide that next week. (Side note, Intel might have 
> > > some Dell XPS 9370 test machines in some QA lab.)
> >
> > Please find both outputs at the end of the file.
>
> Could you also check output of "sudo rdmsr -x 0x3a"?

40005

> Also was CONFIG_X86_SGX_KVM set?

No, it’s not set in Debian’s Linux kernel configuration.

> If CONFIG_X86_SGX_KVM is not set and bit 17 (SGX_LC) of the MSR 3A not set,
> then I think following sequence during sgx_init is possible:

40005 = 0x09c45, so bit 17 (if starting from 0) is 0.

[…]


Kind regards,

Paul