linux-kernel - Re: [PATCH] x86: kvm: use alternatives for VMCALL vs. VMMCALL if kernel text is read-only

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Message-ID: <20140922194335.GB5119@pd.tnic>
Date:	Mon, 22 Sep 2014 21:43:35 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Paolo Bonzini <pbonzini@...hat.com>
Cc:	linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
	chris@...chsys.com, Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	Borislav Petkov <bp@...e.de>
Subject: Re: [PATCH] x86: kvm: use alternatives for VMCALL vs. VMMCALL if
 kernel text is read-only

On Mon, Sep 22, 2014 at 01:17:48PM +0200, Paolo Bonzini wrote:
> On x86_64, kernel text mappings are mapped read-only with CONFIG_DEBUG_RODATA.

Hmm, that depends on DEBUG_KERNEL.

I think you're actually talking about distro kernels which enable
CONFIG_DEBUG_RODATA, right?

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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