From: Nicholas Piggin npiggin@gmail.com
[ Upstream commit 4557ac6b344b8cdf948ff8b007e8e1de34832f2e ]
A typo caused the interrupt handler to branch immediately to the common "unknown interrupt" handler and skip the special case test for denormal cause.
This does not affect KVM softpatch handling (e.g., for POWER9 TM assist) because the KVM test was moved to common code by commit 9600f261acaa ("powerpc/64s/exception: Move KVM test to common code") just before this bug was introduced.
Fixes: 3f7fbd97d07d ("powerpc/64s/exception: Clean up SRR specifiers") Reported-by: Paul Menzel pmenzel@molgen.mpg.de Signed-off-by: Nicholas Piggin npiggin@gmail.com Tested-by: Paul Menzel pmenzel@molgen.mpg.de [mpe: Split selftest into a separate patch] Signed-off-by: Michael Ellerman mpe@ellerman.id.au Link: https://lore.kernel.org/r/20200708074942.1713396-1-npiggin@gmail.com Signed-off-by: Sasha Levin sashal@kernel.org --- arch/powerpc/kernel/exceptions-64s.S | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S index d9ddce40bed89..fd99d4feec7a4 100644 --- a/arch/powerpc/kernel/exceptions-64s.S +++ b/arch/powerpc/kernel/exceptions-64s.S @@ -2547,7 +2547,7 @@ EXC_VIRT_NONE(0x5400, 0x100) INT_DEFINE_BEGIN(denorm_exception) IVEC=0x1500 IHSRR=1 - IBRANCH_COMMON=0 + IBRANCH_TO_COMMON=0 IKVM_REAL=1 INT_DEFINE_END(denorm_exception)