From: Maxim Levitsky <mlevitsk@redhat.com>
To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>,
Ingo Molnar <mingo@redhat.com>,
Josh Poimboeuf <jpoimboe@kernel.org>,
Namhyung Kim <namhyung@kernel.org>,
Tony Luck <tony.luck@intel.com>,
Paolo Bonzini <pbonzini@redhat.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Tim Chen <tim.c.chen@linux.intel.com>,
Borislav Petkov <bp@alien8.de>,
"David S. Miller" <davem@davemloft.net>,
Dave Hansen <dave.hansen@linux.intel.com>,
"Chang S. Bae" <chang.seok.bae@intel.com>,
Jane Malalane <jane.malalane@citrix.com>,
Kees Cook <keescook@chromium.org>,
Kan Liang <kan.liang@linux.intel.com>,
Peter Zijlstra <peterz@infradead.org>,
"maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)"
<x86@kernel.org>, Herbert Xu <herbert@gondor.apana.org.au>,
Jiri Olsa <jolsa@kernel.org>, Mark Rutland <mark.rutland@arm.com>,
linux-perf-users@vger.kernel.org,
"open list:CRYPTO API" <linux-crypto@vger.kernel.org>
Subject: Re: [PATCH v2 0/5] x86: cpuid: improve support for broken CPUID configurations
Date: Mon, 19 Sep 2022 16:43:00 +0300 [thread overview]
Message-ID: <ec4b176036d33ad99fceb43b104cf9be8aca105a.camel@redhat.com> (raw)
In-Reply-To: <4a327f06f6e5da6f3badb5ccf80d22a5c9e18b97.camel@redhat.com>
On Mon, 2022-08-01 at 19:05 +0300, Maxim Levitsky wrote:
> On Thu, 2022-07-28 at 10:30 +0300, Maxim Levitsky wrote:
> > On Mon, 2022-07-18 at 17:11 +0300, Maxim Levitsky wrote:
> > > This patch series aims to harden the cpuid code against the case when
> > > the hypervisor exposes a broken CPUID configuration to the guest,
> > > in the form of having a feature disabled but not features that depend on it.
> > >
> > > This is the more generic way to fix kernel panic in aes-ni kernel driver,
> > > which was triggered by CPUID configuration in which AVX is disabled but
> > > not AVX2.
> > >
> > > https://lore.kernel.org/all/20211103145231.GA4485@gondor.apana.org.au/T/
> > >
> > > This was tested by booting a guest with AVX disabled and not AVX2,
> > > and observing that both a warning is now printed in dmesg, and
> > > that avx2 is gone from /proc/cpuinfo.
> > >
> > > V2:
> > >
> > > I hopefully addressed all the (very good) review feedback.
> > >
> > > Best regards,
> > > Maxim Levitsky
> > >
> > > Maxim Levitsky (5):
> > > perf/x86/intel/lbr: use setup_clear_cpu_cap instead of clear_cpu_cap
> > > x86/cpuid: refactor setup_clear_cpu_cap()/clear_cpu_cap()
> > > x86/cpuid: move filter_cpuid_features to cpuid-deps.c
> > > x86/cpuid: remove 'warn' parameter from filter_cpuid_features
> > > x86/cpuid: check for dependencies violations in CPUID and attempt to
> > > fix them
> > >
> > > arch/x86/events/intel/lbr.c | 2 +-
> > > arch/x86/include/asm/cpufeature.h | 1 +
> > > arch/x86/kernel/cpu/common.c | 51 +-------------------
> > > arch/x86/kernel/cpu/cpuid-deps.c | 80 +++++++++++++++++++++++++++----
> > > 4 files changed, 74 insertions(+), 60 deletions(-)
> > >
> > > --
> > > 2.34.3
> > >
> > >
> > A very kind ping on these patches.
>
> Another kind ping on these patches.
Another very gentle ping on these patches.
Best regards,
Maxim Levitsky
>
>
> Best regards,
> Maxim Levitsky
> > Best regards,
> > Maxim Levitsky
prev parent reply other threads:[~2022-09-19 13:43 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-18 14:11 [PATCH v2 0/5] x86: cpuid: improve support for broken CPUID configurations Maxim Levitsky
2022-07-18 14:11 ` [PATCH v2 1/5] perf/x86/intel/lbr: use setup_clear_cpu_cap instead of clear_cpu_cap Maxim Levitsky
2022-09-19 14:31 ` Borislav Petkov
2022-09-20 8:20 ` Maxim Levitsky
2022-09-26 13:12 ` Borislav Petkov
2022-09-28 10:49 ` Maxim Levitsky
2022-10-20 8:59 ` Borislav Petkov
2022-10-20 9:05 ` Herbert Xu
2022-10-20 10:21 ` Maxim Levitsky
2022-10-20 11:13 ` Borislav Petkov
2022-10-22 21:08 ` H. Peter Anvin
2022-11-02 13:40 ` Paolo Bonzini
2022-11-02 14:27 ` Elliott, Robert (Servers)
2022-11-02 16:23 ` H. Peter Anvin
2022-11-02 18:19 ` H. Peter Anvin
2022-11-02 19:14 ` Elliott, Robert (Servers)
2022-11-03 13:26 ` Paolo Bonzini
2022-11-03 13:30 ` Paolo Bonzini
2022-07-18 14:11 ` [PATCH v2 2/5] x86/cpuid: refactor setup_clear_cpu_cap()/clear_cpu_cap() Maxim Levitsky
2022-10-21 16:19 ` Borislav Petkov
2022-11-07 19:10 ` Borislav Petkov
2022-11-07 21:57 ` Borislav Petkov
2022-07-18 14:11 ` [PATCH v2 3/5] x86/cpuid: move filter_cpuid_features to cpuid-deps.c Maxim Levitsky
2022-07-18 14:11 ` [PATCH v2 4/5] x86/cpuid: remove 'warn' parameter from filter_cpuid_features Maxim Levitsky
2022-07-18 14:11 ` [PATCH v2 5/5] x86/cpuid: check for dependencies violations in CPUID and attempt to fix them Maxim Levitsky
2022-07-28 7:30 ` [PATCH v2 0/5] x86: cpuid: improve support for broken CPUID configurations Maxim Levitsky
2022-08-01 16:05 ` Maxim Levitsky
2022-08-01 16:31 ` Dave Hansen
2022-08-01 16:41 ` Maxim Levitsky
2022-09-19 13:43 ` Maxim Levitsky [this message]
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=ec4b176036d33ad99fceb43b104cf9be8aca105a.camel@redhat.com \
--to=mlevitsk@redhat.com \
--cc=acme@kernel.org \
--cc=alexander.shishkin@linux.intel.com \
--cc=bp@alien8.de \
--cc=chang.seok.bae@intel.com \
--cc=dave.hansen@linux.intel.com \
--cc=davem@davemloft.net \
--cc=herbert@gondor.apana.org.au \
--cc=hpa@zytor.com \
--cc=jane.malalane@citrix.com \
--cc=jolsa@kernel.org \
--cc=jpoimboe@kernel.org \
--cc=kan.liang@linux.intel.com \
--cc=keescook@chromium.org \
--cc=kvm@vger.kernel.org \
--cc=linux-crypto@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-perf-users@vger.kernel.org \
--cc=mark.rutland@arm.com \
--cc=mingo@redhat.com \
--cc=namhyung@kernel.org \
--cc=pawan.kumar.gupta@linux.intel.com \
--cc=pbonzini@redhat.com \
--cc=peterz@infradead.org \
--cc=tglx@linutronix.de \
--cc=tim.c.chen@linux.intel.com \
--cc=tony.luck@intel.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).