| From: |
| Peter Zijlstra <peterz-AT-infradead.org> |
| To: |
| jpoimboe-AT-redhat.com, tglx-AT-linutronix.de |
| Subject: |
| [PATCH v2 00/24] objtool/x86: noinstr vs PARAVIRT |
| Date: |
| Thu, 24 Jun 2021 11:40:59 +0200 |
| Message-ID: |
| <20210624094059.886075998@infradead.org> |
| Cc: |
| linux-kernel-AT-vger.kernel.org, peterz-AT-infradead.org, joro-AT-8bytes.org, boris.ostrovsky-AT-oracle.com, jgross-AT-suse.com, x86-AT-kernel.org, mbenes-AT-suse.com, rostedt-AT-goodmis.org, dvyukov-AT-google.com, elver-AT-google.com |
| Archive-link: |
| Article |
Hi,
Per long standing request from Thomas, this makes the noinstr validation work
with PARAVIRT=y.
It isn't exactly pretty, but it does work.
With all this on top of tip/master (which includes some of the previous round),
all (*) the robots seem to get is endless garbage like:
vmlinux.o: warning: objtool: __rdgsbase_inactive()+0x24: call to ftrace_likely_update() leaves .noinstr.text section
And my secret plan is to pull the KPTI CR3 swizzling into C such that all that
will insta explode and become unfixable.
Steve, can I please delete TRACE_BRANCH_PROFILING and PROFILE_ALL_BRANCHES already?
(*) there were also a few reports from 0day running out of memory.
