From: Brian Gerst <brgerst@gmail.com>
To: David Woodhouse <dwmw2@infradead.org>
Cc: Borislav Petkov <bp@alien8.de>,
Usama Arif <usama.arif@bytedance.com>,
tglx@linutronix.de, kim.phillips@amd.com,
piotrgorski@cachyos.org, oleksandr@natalenko.name,
arjan@linux.intel.com, mingo@redhat.com,
dave.hansen@linux.intel.com, hpa@zytor.com, x86@kernel.org,
pbonzini@redhat.com, paulmck@kernel.org,
linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
rcu@vger.kernel.org, mimoja@mimoja.de, hewenliang4@huawei.com,
thomas.lendacky@amd.com, seanjc@google.com,
pmenzel@molgen.mpg.de, fam.zheng@bytedance.com,
punit.agrawal@bytedance.com, simon.evans@bytedance.com,
liangma@liangbit.com, gpiccoli@igalia.com,
Sabin Rapan <sabrapan@amazon.com>
Subject: Re: [PATCH v16 8/8] x86/smpboot: Allow parallel bringup for SEV-ES
Date: Thu, 23 Mar 2023 10:23:02 -0400 [thread overview]
Message-ID: <CAMzpN2guz4HTQ8uir9Q=xrUpCYyBfuG2zGSJsakaqY7_OvxCPQ@mail.gmail.com> (raw)
In-Reply-To: <4dbdd277c4b26ae4b971a910209a3279f79f6837.camel@infradead.org>
On Thu, Mar 23, 2023 at 5:04 AM David Woodhouse <dwmw2@infradead.org> wrote:
>
> On Thu, 2023-03-23 at 09:51 +0100, Borislav Petkov wrote:
> > On Thu, Mar 23, 2023 at 08:32:49AM +0000, David Woodhouse wrote:
> > > and maybe find some other stuff to cargo-cult to make it safe to run
> > > C code that early...
> >
> > I'm trying to have less shit asm, not more if possible. We've been
> > aiming to convert stuff to C for years.
>
> Absolutely, I understand. There are a few hoops we have to jump through
> to be able to run C code this early, but it's worth it.
>
> > WTF are you calling cargo-cult?
>
> Off the top of my head, I don't actually *remember* all the hoops we
> have to jump through to run C code this early.
Making sure that the stack protector is either disabled or properly
set up, and disabling any instrumentation/profiling/debug crap that
isn't initialized yet.
--
Brian Gerst
next prev parent reply other threads:[~2023-03-23 14:23 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-21 19:40 [PATCH v16 0/8] Parallel CPU bringup for x86_64 Usama Arif
2023-03-21 19:40 ` [PATCH v16 1/8] cpu/hotplug: Move idle_thread_get() to <linux/smpboot.h> Usama Arif
2023-03-21 19:40 ` [PATCH v16 2/8] cpu/hotplug: Reset task stack state in _cpu_up() Usama Arif
2023-03-22 11:06 ` Mark Rutland
2023-03-21 19:40 ` [PATCH v16 3/8] cpu/hotplug: Add dynamic parallel bringup states before CPUHP_BRINGUP_CPU Usama Arif
2023-03-23 22:36 ` Thomas Gleixner
2023-03-23 22:49 ` David Woodhouse
2023-03-23 23:48 ` Thomas Gleixner
2023-03-24 0:06 ` David Woodhouse
2023-03-23 23:05 ` Thomas Gleixner
2023-03-23 23:12 ` David Woodhouse
2023-03-24 1:16 ` Thomas Gleixner
2023-03-24 9:31 ` David Woodhouse
2023-03-24 13:57 ` Thomas Gleixner
2023-03-24 15:33 ` David Woodhouse
2023-03-24 14:07 ` Thomas Gleixner
2023-03-24 9:46 ` Thomas Gleixner
2023-03-24 10:00 ` David Woodhouse
2023-03-27 18:48 ` David Woodhouse
2023-03-21 19:40 ` [PATCH v16 4/8] x86/smpboot: Split up native_cpu_up into separate phases and document them Usama Arif
2023-03-21 19:40 ` [PATCH v16 5/8] x86/smpboot: Support parallel startup of secondary CPUs Usama Arif
2023-03-21 19:40 ` [PATCH v16 6/8] x86/smpboot: Send INIT/SIPI/SIPI to secondary CPUs in parallel Usama Arif
2023-03-21 19:40 ` [PATCH v16 7/8] x86/smpboot: Serialize topology updates for secondary bringup Usama Arif
2023-03-21 19:40 ` [PATCH v16 8/8] x86/smpboot: Allow parallel bringup for SEV-ES Usama Arif
2023-03-22 22:47 ` Borislav Petkov
2023-03-23 8:32 ` David Woodhouse
2023-03-23 8:51 ` Borislav Petkov
2023-03-23 9:04 ` David Woodhouse
2023-03-23 14:23 ` Brian Gerst [this message]
2023-03-27 17:47 ` Borislav Petkov
2023-03-27 18:14 ` David Woodhouse
2023-03-27 19:14 ` Tom Lendacky
2023-03-27 19:32 ` Borislav Petkov
2023-03-23 13:16 ` Tom Lendacky
[not found] ` <751f572f940220775054dc09324b20b929d7d66d.camel@amazon.co.uk>
2023-03-23 18:28 ` Tom Lendacky
2023-03-23 22:13 ` Borislav Petkov
2023-03-23 22:30 ` [EXTERNAL][PATCH " David Woodhouse
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