Re: [PATCH v6 1/2] x86/sev: Make sure IRQs are disabled while GHCB is active

On Fri, Jun 18, 2021 at 10:17:54AM +0200, Joerg Roedel wrote:

On Thu, Jun 17, 2021 at 05:38:46PM +0200, Peter Zijlstra wrote:

quoted

I'm getting (with all of v6.1 applied):

vmlinux.o: warning: objtool: __sev_es_nmi_complete()+0x1bf: call to panic() leaves .noinstr.text section

$ ./scripts/faddr2line defconfig-build/vmlinux __sev_es_nmi_complete+0x1bf
__sev_es_nmi_complete+0x1bf/0x1d0:
__sev_get_ghcb at arch/x86/kernel/sev.c:223
(inlined by) __sev_es_nmi_complete at arch/x86/kernel/sev.c:519

I see where this is coming from, but can't create the same warning. I
did run 'objtool check -n vmlinux'. Is there more to do to get the full
check?

You get those when you enable CONFIG_DEBUG_ENTRY=y (make sure to have
PARAVIRT=n, I so need to go fix that :/).