Re: HVMlite ABI specification DRAFT A

[Boris Ostrovsky <boris.ostrovsky@oracle.com>]

On 02/04/2016 02:09 PM, Samuel Thibault wrote:
> Roger Pau Monné, 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 0x336ec578       */
>>                                      /* ("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