linux-kernel - Re: [PATCH v3 5/6] KVM: TDX: Document alignment requirements for KVM_TDX_INIT_MEM

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: <aWTBfjVEHE5HC5gn@yzhao56-desk.sh.intel.com>
Date: Mon, 12 Jan 2026 17:40:14 +0800
From: Yan Zhao <yan.y.zhao@...el.com>
To: Michael Roth <michael.roth@....com>
CC: <kvm@...r.kernel.org>, <linux-coco@...ts.linux.dev>, <linux-mm@...ck.org>,
	<linux-kernel@...r.kernel.org>, <thomas.lendacky@....com>,
	<pbonzini@...hat.com>, <seanjc@...gle.com>, <vbabka@...e.cz>,
	<ashish.kalra@....com>, <liam.merwick@...cle.com>, <david@...hat.com>,
	<vannapurve@...gle.com>, <ackerleytng@...gle.com>, <aik@....com>,
	<ira.weiny@...el.com>, <pankaj.gupta@....com>, Kai Huang
	<kai.huang@...el.com>
Subject: Re: [PATCH v3 5/6] KVM: TDX: Document alignment requirements for
 KVM_TDX_INIT_MEM_REGION

Reviewed-by: Yan Zhao <yan.y.zhao@...el.com>

On Thu, Jan 08, 2026 at 03:46:21PM -0600, Michael Roth wrote:
> Since it was never possible to use a non-PAGE_SIZE-aligned @source_addr,
> go ahead and document this as a requirement. This is in preparation for
> enforcing page-aligned @source_addr for all architectures in
> guest_memfd.
> 
> Reviewed-by: Vishal Annapurve <vannapurve@...gle.com>
> Tested-by: Kai Huang <kai.huang@...el.com>
> Signed-off-by: Michael Roth <michael.roth@....com>
> ---
>  Documentation/virt/kvm/x86/intel-tdx.rst | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/Documentation/virt/kvm/x86/intel-tdx.rst b/Documentation/virt/kvm/x86/intel-tdx.rst
> index 5efac62c92c7..6a222e9d0954 100644
> --- a/Documentation/virt/kvm/x86/intel-tdx.rst
> +++ b/Documentation/virt/kvm/x86/intel-tdx.rst
> @@ -156,7 +156,7 @@ KVM_TDX_INIT_MEM_REGION
>  :Returns: 0 on success, <0 on error
>  
>  Initialize @nr_pages TDX guest private memory starting from @gpa with userspace
> -provided data from @source_addr.
> +provided data from @source_addr. @source_addr must be PAGE_SIZE-aligned.
>  
>  Note, before calling this sub command, memory attribute of the range
>  [gpa, gpa + nr_pages] needs to be private.  Userspace can use
> -- 
> 2.25.1
>