[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH v20210111 10/39] tools: add xc_is_known_page_type to libxenctrl
Users of xc_get_pfn_type_batch may want to sanity check the data returned by Xen. Add a simple helper for this purpose. Signed-off-by: Olaf Hering <olaf@xxxxxxxxx> --- tools/libs/ctrl/xc_private.h | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/tools/libs/ctrl/xc_private.h b/tools/libs/ctrl/xc_private.h index 5d2c7274fb..afb08aafe1 100644 --- a/tools/libs/ctrl/xc_private.h +++ b/tools/libs/ctrl/xc_private.h @@ -421,6 +421,39 @@ void *xc_map_foreign_ranges(xc_interface *xch, uint32_t dom, int xc_get_pfn_type_batch(xc_interface *xch, uint32_t dom, unsigned int num, xen_pfn_t *); +/* Sanitiy check for types returned by Xen */ +static inline bool xc_is_known_page_type(xen_pfn_t type) +{ + bool ret; + + switch (type) + { + case XEN_DOMCTL_PFINFO_NOTAB: + + case XEN_DOMCTL_PFINFO_L1TAB: + case XEN_DOMCTL_PFINFO_L1TAB | XEN_DOMCTL_PFINFO_LPINTAB: + + case XEN_DOMCTL_PFINFO_L2TAB: + case XEN_DOMCTL_PFINFO_L2TAB | XEN_DOMCTL_PFINFO_LPINTAB: + + case XEN_DOMCTL_PFINFO_L3TAB: + case XEN_DOMCTL_PFINFO_L3TAB | XEN_DOMCTL_PFINFO_LPINTAB: + + case XEN_DOMCTL_PFINFO_L4TAB: + case XEN_DOMCTL_PFINFO_L4TAB | XEN_DOMCTL_PFINFO_LPINTAB: + + case XEN_DOMCTL_PFINFO_XTAB: + case XEN_DOMCTL_PFINFO_XALLOC: + case XEN_DOMCTL_PFINFO_BROKEN: + ret = true; + break; + default: + ret = false; + break; + } + return ret; +} + void bitmap_64_to_byte(uint8_t *bp, const uint64_t *lp, int nbits); void bitmap_byte_to_64(uint64_t *lp, const uint8_t *bp, int nbits);
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