From mboxrd@z Thu Jan  1 00:00:00 1970
From: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Subject: Re: HVMlite ABI specification DRAFT A
Date: Thu, 4 Feb 2016 14:18:46 -0500
Message-ID: <56B3A416.3090709@oracle.com>
References: <56B38EDE.5090700@citrix.com> <20160204190915.GB3377@var.home>
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To: Samuel Thibault <samuel.thibault@ens-lyon.org>, =?UTF-8?Q?Roger_Pau_Monn=c3=a9?= <roger.pau@citrix.com>, xen-devel <xen-devel@lists.xenproject.org>, Andrew Cooper <andrew.cooper3@citrix.com>, Jan Beulich <JBeulich@suse.com>, David Vrabel <david.vrabel@citrix.com>, Paul Durrant <paul.durrant@citrix.com>, Stefano Stabellini <stefano.stabellini@eu.citrix.com>, Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>, Wei Liu <wei.liu2@citrix.com>, Tim Deegan <tim@xen.org>
List-Id: xen-devel@lists.xenproject.org

On 02/04/2016 02:09 PM, Samuel Thibault wrote:
> Roger Pau Monn=E9, on Thu 04 Feb 2016 18:48:14 +0100, wrote:
>>      struct hvm_start_info {
>>      #define HVM_START_MAGIC_VALUE 0x336ec578
>>          uint32_t magic;             /* Contains the magic value 0x336ec=
578       */
>>                                      /* ("xEn3" with the 0x80 bit of the=
 "E" set).*/
>>          uint32_t flags;             /* SIF_xxx flags.                  =
          */
>>          uint32_t cmdline_paddr;     /* Physical address of the command =
line.     */
>>          uint32_t nr_modules;        /* Number of modules passed to the =
kernel.   */
>>          uint32_t modlist_paddr;     /* Physical address of an array of =
          */
>>                                      /* hvm_modlist_entry.              =
          */
>>      };
> Mmm, don't we also need a description of the initial page table, so that
> the guest kernel knows which part of the memory it shouldn't use until
> having initialized its own page table?  Or is there none in the guest
> physical memory at startup of HVMlite mode?

We start with paging off. CR0 only has PE bit set when guest is loaded.

-boris