The patch titled
KVM: fix asm constraints with CONFIG_FRAME_POINTER=n
has been added to the -mm tree. Its filename is
kvm-fix-asm-constraints-with-config_frame_pointer=n.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: KVM: fix asm constraints with CONFIG_FRAME_POINTER=n
From: Avi Kivity <avi@xxxxxxxxxxxx>
A "g" constraint may place a local variable in an %rsp-relative memory operand.
but if your assembly changes %rsp, the operand points to the wrong location.
An "r" constraint fixes that.
Thanks to Ingo Molnar for neatly bisecting the problem.
Signed-off-by: Avi Kivity <avi@xxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
drivers/kvm/vmx.c | 2 +-
1 files changed, 1 insertion(+), 1 deletion(-)
diff -puN drivers/kvm/vmx.c~kvm-fix-asm-constraints-with-config_frame_pointer=n drivers/kvm/vmx.c
--- a/drivers/kvm/vmx.c~kvm-fix-asm-constraints-with-config_frame_pointer=n
+++ a/drivers/kvm/vmx.c
@@ -1825,7 +1825,7 @@ again:
#endif
"setbe %0 \n\t"
"popf \n\t"
- : "=g" (fail)
+ : "=r" (fail)
: "r"(vcpu->launched), "d"((unsigned long)HOST_RSP),
"c"(vcpu),
[rax]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RAX])),
_
Patches currently in -mm which might be from avi@xxxxxxxxxxxx are
kvm-add-vm-exit-profiling.patch
kvm-make-sure-there-is-a-vcpu-context-loaded-when.patch
kvm-fix-race-between-mmio-reads-and-injected-interrupts.patch
kvm-x86-emulator-fix-bit-string-instructions.patch
kvm-fix-asm-constraints-with-config_frame_pointer=n.patch
kvm-fix-bogus-pagefault-on-writable-pages.patch
-
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