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4548f63e65
linux/arch/x86/kvm
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Josh Poimboeuf 4548f63e65 x86/kvm: Add stack frame dependency to fastop() inline asm 
The kbuild test robot reported this objtool warning [1]:

  arch/x86/kvm/emulate.o: warning: objtool: fastop()+0x69: call without frame pointer save/setup

The issue seems to be caused by CONFIG_PROFILE_ALL_BRANCHES.  With that
option, for some reason gcc decides not to create a stack frame in
fastop() before doing the inline asm call, which can result in a bad
stack trace.

Force a stack frame to be created if CONFIG_FRAME_POINTER is enabled by
listing the stack pointer as an output operand for the inline asm
statement.

This change has no effect for !CONFIG_PROFILE_ALL_BRANCHES.

[1] https://lists.01.org/pipermail/kbuild-all/2016-March/018249.html

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-05-10 18:16:50 +02:00
..
assigned-dev.c KVM: x86: use list_for_each_entry* 2016-02-23 15:40:54 +01:00
assigned-dev.h KVM: x86: move device assignment out of kvm_host.h 2014-11-24 16:53:50 +01:00
cpuid.c KVM: x86: mask CPUID(0xD,0x1).EAX against host value 2016-04-10 21:53:50 +02:00
cpuid.h KVM, pkeys: expose CPUID/CR4 to guest 2016-03-22 16:38:17 +01:00
emulate.c x86/kvm: Add stack frame dependency to fastop() inline asm 2016-05-10 18:16:50 +02:00
hyperv.c KVM: Hyper-V: do not do hypercall userspace exits if SynIC is disabled 2016-04-01 12:10:09 +02:00
hyperv.h kvm/x86: Hyper-V SynIC timers 2015-12-16 18:49:45 +01:00
i8254.c KVM: i8254: drop local copy of mul_u64_u32_div 2016-03-04 22:39:17 +01:00
i8254.h KVM: i8254: turn kvm_kpit_state.reinject into atomic_t 2016-03-04 09:30:25 +01:00
i8259.c KVM: x86: clean/fix memory barriers in irqchip_in_kernel 2015-07-30 16:02:56 +02:00
ioapic.c kvm: x86: Check dest_map->vector to match eoi signals for rtc 2016-03-03 14:36:18 +01:00
ioapic.h kvm: x86: Track irq vectors in ioapic->rtc_status.dest_map 2016-03-03 14:36:18 +01:00
iommu.c kvm: rename pfn_t to kvm_pfn_t 2016-01-15 17:56:32 -08:00
irq_comm.c kvm: x86: Convert ioapic->rtc_status.dest_map to a struct 2016-03-03 14:36:17 +01:00
irq.c KVM: x86: consolidate "has lapic" checks into irq.c 2016-02-09 16:57:39 +01:00
irq.h KVM: x86: consolidate different ways to test for in-kernel LAPIC 2016-02-09 16:57:45 +01:00
Kconfig KVM: x86: select IRQ_BYPASS_MANAGER 2015-10-01 15:06:52 +02:00
kvm_cache_regs.h KVM, pkeys: add pkeys support for permission_fault 2016-03-22 16:23:37 +01:00
lapic.c kvm: x86: make lapic hrtimer pinned 2016-04-05 14:19:08 +02:00
lapic.h kvm: x86: Convert ioapic->rtc_status.dest_map to a struct 2016-03-03 14:36:17 +01:00
Makefile KVM: page track: add the framework of guest page tracking 2016-03-03 14:36:20 +01:00
mmu_audit.c kvm: rename pfn_t to kvm_pfn_t 2016-01-15 17:56:32 -08:00
mmu.c kvm: set page dirty only if page has been writable 2016-04-01 12:10:10 +02:00
mmu.h KVM: MMU: fix permission_fault() 2016-04-10 21:53:49 +02:00
mmutrace.h tracing: Rename ftrace_event.h to trace_events.h 2015-05-13 14:05:12 -04:00
mtrr.c KVM: MTRR: treat memory as writeback if MTRR is disabled in guest CPUID 2015-12-22 15:29:00 +01:00
page_track.c KVM: page_track: fix access to NULL slot 2016-03-22 17:27:28 +01:00
paging_tmpl.h KVM: MMU: fix permission_fault() 2016-04-10 21:53:49 +02:00
pmu_amd.c KVM: x86/vPMU: Fix unnecessary signed extension for AMD PERFCTRn 2015-08-11 15:19:41 +02:00
pmu_intel.c KVM: x86/vPMU: Define kvm_pmu_ops to support vPMU function dispatch 2015-06-23 14:12:14 +02:00
pmu.c KVM: x86: consolidate different ways to test for in-kernel LAPIC 2016-02-09 16:57:45 +01:00
pmu.h KVM: x86/vPMU: Define kvm_pmu_ops to support vPMU function dispatch 2015-06-23 14:12:14 +02:00
svm.c KVM, pkeys: add pkeys support for permission_fault 2016-03-22 16:23:37 +01:00
trace.h KVM/VMX: Add host irq information in trace event when updating IRTE for posted interrupts 2016-02-09 13:24:43 +01:00
tss.h
vmx.c Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-03-24 09:47:32 -07:00
x86.c kvm: x86: do not leak guest xcr0 into host interrupt handlers 2016-04-10 21:53:49 +02:00
x86.h KVM, pkeys: add pkeys support for xsave state 2016-03-22 16:21:05 +01:00