linux-kernel - Re: [PATCH v2 13/21] x86/virt/tdx: Allocate and set up PAMTs for TDMRs

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Message-ID: <83ccfde2f88b9be9eed40784ac22617dd0d69a33.camel@intel.com>
Date:   Mon, 28 Mar 2022 14:16:40 +1300
From:   Kai Huang <kai.huang@...el.com>
To:     Isaku Yamahata <isaku.yamahata@...il.com>
Cc:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        dave.hansen@...el.com, seanjc@...gle.com, pbonzini@...hat.com,
        kirill.shutemov@...ux.intel.com,
        sathyanarayanan.kuppuswamy@...ux.intel.com, peterz@...radead.org,
        tony.luck@...el.com, ak@...ux.intel.com, dan.j.williams@...el.com,
        isaku.yamahata@...el.com
Subject: Re: [PATCH v2 13/21] x86/virt/tdx: Allocate and set up PAMTs for
 TDMRs

On Thu, 2022-03-24 at 11:06 -0700, Isaku Yamahata wrote:
> On Sun, Mar 13, 2022 at 11:49:53PM +1300,
> Kai Huang <kai.huang@...el.com> wrote:
> 
> > diff --git a/arch/x86/virt/vmx/tdx.c b/arch/x86/virt/vmx/tdx.c
> > index 1939b64d23e8..c58c99b94c72 100644
> > --- a/arch/x86/virt/vmx/tdx.c
> > +++ b/arch/x86/virt/vmx/tdx.c
> > @@ -21,6 +21,7 @@
> >  #include <asm/cpufeatures.h>
> >  #include <asm/virtext.h>
> >  #include <asm/e820/api.h>
> > +#include <asm/pgtable.h>
> >  #include <asm/tdx.h>
> >  #include "tdx.h"
> >  
> > @@ -66,6 +67,16 @@
> >  #define TDMR_START(_tdmr)	((_tdmr)->base)
> >  #define TDMR_END(_tdmr)		((_tdmr)->base + (_tdmr)->size)
> >  
> > +/* Page sizes supported by TDX */
> > +enum tdx_page_sz {
> > +	TDX_PG_4K = 0,
> > +	TDX_PG_2M,
> > +	TDX_PG_1G,
> > +	TDX_PG_MAX,
> > +};
> > +
> > +#define TDX_HPAGE_SHIFT	9
> > +
> >  /*
> >   * TDX module status during initialization
> >   */
> > @@ -893,7 +904,7 @@ static int create_tdmrs(struct tdmr_info **tdmr_array, int *tdmr_num)
> >  	 * them.  To keep it simple, always try to use one TDMR to cover
> >  	 * one RAM entry.
> >  	 */
> > -	e820_for_each_mem(e820_table, i, start, end) {
> > +	e820_for_each_mem(i, start, end) {
> 
> This patch doesn't change e820_for_each_mem.  This hunk should go into the
> previous patch?
> 
> thansk,
> 

Exactly.  My mistake.  Thanks for catching. 

-- 
Thanks,
-Kai