Peter Zijlstra ba08abca66 objtool,x86: Fix uaccess PUSHF/POPF validation ... Commit ab234a260b ("x86/pv: Rework arch_local_irq_restore() to not use popf") replaced "push %reg; popf" with something like: "test $0x200, %reg; jz 1f; sti; 1:", which breaks the pushf/popf symmetry that commit ea24213d80 ("objtool: Add UACCESS validation") relies on. The result is: drivers/gpu/drm/amd/amdgpu/si.o: warning: objtool: si_common_hw_init()+0xf36: PUSHF stack exhausted Meanwhile, commit c9c324dc22 ("objtool: Support stack layout changes in alternatives") makes that we can actually use stack-ops in alternatives, which means we can revert 1ff865e343 ("x86,smap: Fix smap_{save,restore}() alternatives"). That in turn means we can limit the PUSHF/POPF handling of ea24213d80 to those instructions that are in alternatives. Fixes: ab234a260b ("x86/pv: Rework arch_local_irq_restore() to not use popf") Reported-by: Borislav Petkov <bp@alien8.de> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Josh Poimboeuf <jpoimboe@redhat.com> Link: https://lkml.kernel.org/r/YEY4rIbQYa5fnnEp@hirez.programming.kicks-ass.net		2021-03-12 09:15:49 +01:00
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accounting
arch	objtool updates:	2021-02-23 09:56:13 -08:00
bootconfig	tools/bootconfig: Add tracing_on support to helper scripts	2021-01-14 10:32:20 -05:00
bpf	New features:	2021-02-22 13:59:43 -08:00
build	New features:	2021-02-22 13:59:43 -08:00
cgroup
debugging
edid
firewire
firmware
gpio	tools: gpio: remove uAPI v1 code no longer used by selftests	2021-02-15 11:43:28 +01:00
hv
iio
include	idmapped-mounts-v5.12	2021-02-23 13:39:45 -08:00
io_uring
kvm/kvm_stat	tools/kvm_stat: Exempt time-based counters	2020-12-11 19:18:51 -05:00
laptop
leds
lib	New features:	2021-02-22 13:59:43 -08:00
memory-model	tools/memory-model: Fix typo in klitmus7 compatibility table	2021-01-04 14:40:50 -08:00
objtool	objtool,x86: Fix uaccess PUSHF/POPF validation	2021-03-12 09:15:49 +01:00
pci
pcmcia
perf	New features:	2021-02-22 13:59:43 -08:00
power	platform-drivers-x86 for v5.12-1	2021-02-22 08:50:01 -08:00
scripts	New features:	2021-02-22 13:59:43 -08:00
spi
testing	* Doc fixes	2021-03-04 11:26:17 -08:00
thermal/tmon
time
tracing	tracing/tools: fix a couple of spelling mistakes	2021-02-25 12:54:16 -05:00
usb
virtio	tools/virtio: add barrier for aarch64	2020-12-18 16:14:30 -05:00
vm
wmi
Makefile	tracing/tools: Add the latency-collector to tools directory	2021-02-12 11:52:59 -05:00