linux-kernel - Re: [CFT PATCH v2 2/2] KVM: x86: support XSAVES usage in the host

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <20141204135255.GA26941@potion.brq.redhat.com>
Date:	Thu, 4 Dec 2014 14:52:56 +0100
From:	Radim Krčmář <rkrcmar@...hat.com>
To:	Paolo Bonzini <pbonzini@...hat.com>
Cc:	Nadav Amit <nadav.amit@...il.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	kvm list <kvm@...r.kernel.org>,
	Wanpeng Li <wanpeng.li@...ux.intel.com>,
	Nadav Amit <namit@...technion.ac.il>, hpa@...ux.intel.com,
	Fenghua Yu <fenghua.yu@...el.com>
Subject: Re: [CFT PATCH v2 2/2] KVM: x86: support XSAVES usage in the host

2014-12-04 14:43+0100, Paolo Bonzini:
> On 03/12/2014 19:45, Radim Krčmář wrote:
> > Btw, we don't care about crashers from userspace?
> 
> We do, but they're taken care of by
> 
>                 if (xstate_bv & ~kvm_supported_xcr0())
>                         return -EINVAL;
> 
> in kvm_vcpu_ioctl_x86_set_xsave.  kvm_supported_xcr0 is always a subset
> of host_xcr0, hence:

Ah, thanks.  (If this trend continues, I won't be able to hold even
bodily fluids after few more reviews ...)
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/