linux-kernel - Re: [RFC PATCH 29/32] KVM: arm64: Pass hypercalls to userspace

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Date:   Sat, 11 Feb 2023 01:44:59 +0000
From:   Oliver Upton <oliver.upton@...ux.dev>
To:     James Morse <james.morse@....com>
Cc:     Marc Zyngier <maz@...nel.org>, linux-pm@...r.kernel.org,
        loongarch@...ts.linux.dev, kvmarm@...ts.linux.dev,
        kvm@...r.kernel.org, linux-acpi@...r.kernel.org,
        linux-arch@...r.kernel.org, linux-ia64@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        x86@...nel.org, Thomas Gleixner <tglx@...utronix.de>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Sudeep Holla <sudeep.holla@....com>,
        Borislav Petkov <bp@...en8.de>, H Peter Anvin <hpa@...or.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Ingo Molnar <mingo@...hat.com>, Will Deacon <will@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Huacai Chen <chenhuacai@...nel.org>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Len Brown <lenb@...nel.org>,
        Rafael Wysocki <rafael@...nel.org>,
        WANG Xuerui <kernel@...0n.name>,
        Salil Mehta <salil.mehta@...wei.com>,
        Russell King <linux@...linux.org.uk>,
        Jean-Philippe Brucker <jean-philippe@...aro.org>
Subject: Re: [RFC PATCH 29/32] KVM: arm64: Pass hypercalls to userspace

Hey James,

On Tue, Feb 07, 2023 at 05:50:58PM +0000, James Morse wrote:

[...]

> > As mentioned above, I think this interface should go both ways.
> > Userspace should request the forwarding of a certain range of
> > hypercalls via a similar SET_ATTR interface.
> 
> Yup, I'll sync up with Oliver about that.

Sorry, I was tied up with some unrelated stuff at work this week. I
polished up what I had and sent out an RFC v2 for SMCCC filtering [1].
Mentioning it here because my email service gives up if I Cc too many
recipients so I didn't include everyone on this series.

[1]: https://lore.kernel.org/linux-arm-kernel/20230211013759.3556016-1-oliver.upton@linux.dev/

-- 
Thanks,
Oliver