linux-kernel - RE: [PATCH V4 0/9] x86/hyperv: Add AMD sev-snp enlightened guest support on hyperv

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Date:   Sun, 6 Aug 2023 01:53:24 +0000
From:   Dexuan Cui <decui@...rosoft.com>
To:     Wei Liu <wei.liu@...nel.org>, Tianyu Lan <ltykernel@...il.com>
CC:     KY Srinivasan <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "bp@...en8.de" <bp@...en8.de>,
        "dave.hansen@...ux.intel.com" <dave.hansen@...ux.intel.com>,
        "x86@...nel.org" <x86@...nel.org>, "hpa@...or.com" <hpa@...or.com>,
        "daniel.lezcano@...aro.org" <daniel.lezcano@...aro.org>,
        "arnd@...db.de" <arnd@...db.de>,
        "Michael Kelley (LINUX)" <mikelley@...rosoft.com>,
        Tianyu Lan <Tianyu.Lan@...rosoft.com>,
        "linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>,
        "linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        vkuznets <vkuznets@...hat.com>
Subject: RE: [PATCH V4 0/9] x86/hyperv: Add AMD sev-snp enlightened guest
 support on hyperv

> From: Dexuan Cui
> Sent: Saturday, August 5, 2023 4:37 PM
> [...]
> > From: Wei Liu <wei.liu@...nel.org>
> > Sent: Friday, August 4, 2023 4:35 PM
> > To: Tianyu Lan <ltykernel@...il.com>
> >  [...]
> > On Fri, Aug 04, 2023 at 11:22:44AM -0400, Tianyu Lan wrote:
> > > From: Tianyu Lan <tiala@...rosoft.com>
> > [...]
> > > Tianyu Lan (9):
> [...]
> > >   x86/hyperv: Use vmmcall to implement Hyper-V hypercall in sev-snp ...
> 
> Unluckily this commit causes a crash on Intel CPUs (see the below call-trace).
> 
> I made a fix here:
> https://github.com/dcui/linux/commit/c4db45f6256248435b2a303b264ecbb
> 41320c41d
> I guess Wei can squash the fix into Tianyu's commit in the hyperv-next
> branch?

I also made a patch to fix the ARM64 build:
https://github.com/dcui/linux/commit/a559709c612de2a212e288ef1a8b0abfabb168e5