[PATCH 5.11 509/601] powerpc/syscall: Change condition to check MSR_RI

Greg Kroah-Hartman
2021-05-12T17:56:36Z

From: Christophe Leroy <christophe.leroy@csgroup.eu>

[ Upstream commit c01b916658150e98f00a4981750c37a3224c8735 ]

In system_call_exception(), MSR_RI also needs to be checked on 8xx.
Only booke and 40x doesn't have MSR_RI.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/67820fada8dd6a8fe9d7b666f175d4cc9d8de87e.1612796617.git.christophe.leroy@csgroup.eu
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/powerpc/kernel/interrupt.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/kernel/interrupt.c b/arch/powerpc/kernel/interrupt.c
index 7c85ed04a164..f103fb9f2cfe 100644
--- a/arch/powerpc/kernel/interrupt.c
+++ b/arch/powerpc/kernel/interrupt.c
@@ -29,7 +29,7 @@ notrace long system_call_exception(long r3, long r4, long r5,

trace_hardirqs_off(); /* finish reconciling */

- if (IS_ENABLED(CONFIG_PPC_BOOK3S))
+ if (!IS_ENABLED(CONFIG_BOOKE) && !IS_ENABLED(CONFIG_40x))
BUG_ON(!(regs->msr & MSR_RI));
BUG_ON(!(regs->msr & MSR_PR));
BUG_ON(!FULL_REGS(regs));
@@ -289,7 +289,7 @@ notrace unsigned long interrupt_exit_user_prepare(struct pt_regs *regs, unsigned
unsigned long flags;
unsigned long ret = 0;

- if (IS_ENABLED(CONFIG_PPC_BOOK3S))
+ if (!IS_ENABLED(CONFIG_BOOKE) && !IS_ENABLED(CONFIG_40x))
BUG_ON(!(regs->msr & MSR_RI));
BUG_ON(!(regs->msr & MSR_PR));
BUG_ON(!FULL_REGS(regs));
@@ -377,7 +377,8 @@ notrace unsigned long interrupt_exit_kernel_prepare(struct pt_regs *regs, unsign
unsigned long ret = 0;
unsigned long amr;

- if (IS_ENABLED(CONFIG_PPC_BOOK3S) && unlikely(!(regs->msr & MSR_RI)))
+ if (!IS_ENABLED(CONFIG_BOOKE) && !IS_ENABLED(CONFIG_40x) &&
+ unlikely(!(regs->msr & MSR_RI)))
unrecoverable_exception(regs);
BUG_ON(regs->msr & MSR_PR);
BUG_ON(!FULL_REGS(regs));
--
2.30.2