Merge tag 'kvm-ppc-fixes-5.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc into kvm-master

PPC KVM fixes for 5.2

- Several bug fixes for the new XIVE-native code.
- Replace kvm->lock by other mutexes in several places where we hold a
  vcpu mutex, to avoid lock order inversions.
- Fix a lockdep warning on guest entry for radix-mode guests.
- Fix a bug causing user-visible corruption of SPRG3 on the host.

1 files changed, 8 insertions, 2 deletions

diff --git a/tools/testing/selftests/x86/syscall_arg_fault.c b/tools/testing/selftests/x86/syscall_arg_fault.c
index 7db4fc9fa09f..d2548401921f 100644
--- a/tools/testing/selftests/x86/syscall_arg_fault.c
+++ b/tools/testing/selftests/x86/syscall_arg_fault.c
@@ -43,7 +43,7 @@ static sigjmp_buf jmpbuf;
 
 static volatile sig_atomic_t n_errs;
 
-static void sigsegv(int sig, siginfo_t *info, void *ctx_void)
+static void sigsegv_or_sigbus(int sig, siginfo_t *info, void *ctx_void)
 {
         ucontext_t *ctx = (ucontext_t*)ctx_void;
 
@@ -73,7 +73,13 @@ int main()
         if (sigaltstack(&stack, NULL) != 0)
                 err(1, "sigaltstack");
 
-        sethandler(SIGSEGV, sigsegv, SA_ONSTACK);
+        sethandler(SIGSEGV, sigsegv_or_sigbus, SA_ONSTACK);
+        /*
+         * The actual exception can vary.  On Atom CPUs, we get #SS
+         * instead of #PF when the vDSO fails to access the stack when
+         * ESP is too close to 2^32, and #SS causes SIGBUS.
+         */
+        sethandler(SIGBUS, sigsegv_or_sigbus, SA_ONSTACK);
         sethandler(SIGILL, sigill, SA_ONSTACK);
 
         /*