In some cases tdx_tdvpr_pa() is not fully inlined into tdh_vp_enter(), which
causes the following warning:
vmlinux.o: warning: objtool: tdh_vp_enter+0x8: call to tdx_tdvpr_pa() leaves .noinstr.text section
This happens if the compiler considers tdx_tdvpr_pa() to be "large", for example
because CONFIG_SPARSEMEM adds two function calls to page_to_section() and
__section_mem_map_addr():
({ const struct page *__pg = (pg); \
int __sec = page_to_section(__pg); \
(unsigned long)(__pg - __section_mem_map_addr(__nr_to_section(__sec)));
\
})
Because exiting the noinstr section is a no-no, just mark tdh_vp_enter() for
full inlining.
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Analyzed-by: Xiaoyao Li <xiaoyao.li@xxxxxxxxx>
Closes: https://lore.kernel.org/oe-kbuild-all/202505240530.5KktQ5mX-lkp@xxxxxxxxx/
Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
---
arch/x86/virt/vmx/tdx/tdx.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/virt/vmx/tdx/tdx.c b/arch/x86/virt/vmx/tdx/tdx.c
index f5e2a937c1e7..2457d13c3f9e 100644
--- a/arch/x86/virt/vmx/tdx/tdx.c
+++ b/arch/x86/virt/vmx/tdx/tdx.c
@@ -1517,7 +1517,7 @@ static void tdx_clflush_page(struct page *page)
clflush_cache_range(page_to_virt(page), PAGE_SIZE);
}
-noinstr u64 tdh_vp_enter(struct tdx_vp *td, struct tdx_module_args *args)
+noinstr __flatten u64 tdh_vp_enter(struct tdx_vp *td, struct tdx_module_args *args)
{
args->rcx = tdx_tdvpr_pa(td);
--
2.43.5
