On 12/3/2024 9:03 AM, Rick Edgecombe wrote:
[...]
+/*
+ * The TDX module exposes a CLFLUSH_BEFORE_ALLOC bit to specify whether
+ * a CLFLUSH of pages is required before handing them to the TDX module.
+ * Be conservative and make the code simpler by doing the CLFLUSH
+ * unconditionally.
+ */
+static void tdx_clflush_page(struct page *tdr)
The argument should have a generic name instead of tdr, because it's not
limited to TDR.
+{
+ clflush_cache_range(page_to_virt(tdr), PAGE_SIZE);
+}
+
+u64 tdh_mng_addcx(struct tdx_td *td, struct page *tdcs_page)
+{
+ struct tdx_module_args args = {
+ .rcx = page_to_pfn(tdcs_page) << PAGE_SHIFT,
+ .rdx = tdx_tdr_pa(td),
+ };
+
+ tdx_clflush_page(tdcs_page);
+ return seamcall(TDH_MNG_ADDCX, &args);
+}
+EXPORT_SYMBOL_GPL(tdh_mng_addcx);
+
[...]
