On Fri, Mar 18, 2016 at 02:53:24PM +0800, Dongli Zhang wrote:
> + fd = path_fopen("r", 0, _PATH_SYS_HYP_FEATURES);
Is the file always available (including old XEN versions)? This
function exit on error, maybe we need path_exist() before open.
There is also path_read_u64() to avoid path_fopen() & fscanf().
Karel
> + if (fd && fscanf(fd, "%x", &features) == 1) {
> + /* Xen para-virt (or pvh) */
> + if (!(features & (1U << XENFEAT_hvm_pirqs)))
> + desc->virtype = VIRT_PARA;
> + fclose(fd);
> + }
> + }
> + } else if (read_hypervisor_powerpc(desc) > 0) {}
>
> /* Xen para-virt or dom0 */
> else if (path_exist(_PATH_PROC_XEN)) {
--
Karel Zak <kzak@xxxxxxxxxx>
http://karelzak.blogspot.com
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