From 442b6e8e03e44dc3a33142ab3b8d0b3395053274 Mon Sep 17 00:00:00 2001
From: Michael Ellerman <mpe@ellerman.id.au>
Date: Mon, 19 Jun 2017 21:52:03 +1000
Subject: [PATCH] powerpc/64s: Rename slb_miss_realmode() to slb_miss_common()
References: CVE-2020-4788 bsc#1177666
Patch-mainline: v4.13-rc1
Git-commit: 442b6e8e03e44dc3a33142ab3b8d0b3395053274
slb_miss_realmode() doesn't always runs in real mode, which is what the
name implies. So rename it to avoid confusing people.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Acked-by: Michal Suchanek <msuchanek@suse.de>
---
arch/powerpc/kernel/exceptions-64s.S | 15 +++++++++------
1 file changed, 9 insertions(+), 6 deletions(-)
diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
index 7bdfddbe0328..6ad755e0cb29 100644
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -514,7 +514,7 @@ EXC_REAL_BEGIN(data_access_slb, 0x380, 0x80)
mfspr r3,SPRN_DAR
mfspr r11,SPRN_SRR1
crset 4*cr6+eq
- BRANCH_TO_COMMON(r10, slb_miss_realmode)
+ BRANCH_TO_COMMON(r10, slb_miss_common)
EXC_REAL_END(data_access_slb, 0x380, 0x80)
EXC_VIRT_BEGIN(data_access_slb, 0x4380, 0x80)
@@ -525,7 +525,7 @@ EXC_VIRT_BEGIN(data_access_slb, 0x4380, 0x80)
mfspr r3,SPRN_DAR
mfspr r11,SPRN_SRR1
crset 4*cr6+eq
- BRANCH_TO_COMMON(r10, slb_miss_realmode)
+ BRANCH_TO_COMMON(r10, slb_miss_common)
EXC_VIRT_END(data_access_slb, 0x4380, 0x80)
TRAMP_KVM_SKIP(PACA_EXSLB, 0x380)
@@ -558,7 +558,7 @@ EXC_REAL_BEGIN(instruction_access_slb, 0x480, 0x80)
mfspr r3,SPRN_SRR0 /* SRR0 is faulting address */
mfspr r11,SPRN_SRR1
crclr 4*cr6+eq
- BRANCH_TO_COMMON(r10, slb_miss_realmode)
+ BRANCH_TO_COMMON(r10, slb_miss_common)
EXC_REAL_END(instruction_access_slb, 0x480, 0x80)
EXC_VIRT_BEGIN(instruction_access_slb, 0x4480, 0x80)
@@ -569,13 +569,16 @@ EXC_VIRT_BEGIN(instruction_access_slb, 0x4480, 0x80)
mfspr r3,SPRN_SRR0 /* SRR0 is faulting address */
mfspr r11,SPRN_SRR1
crclr 4*cr6+eq
- BRANCH_TO_COMMON(r10, slb_miss_realmode)
+ BRANCH_TO_COMMON(r10, slb_miss_common)
EXC_VIRT_END(instruction_access_slb, 0x4480, 0x80)
TRAMP_KVM(PACA_EXSLB, 0x480)
-/* This handler is used by both 0x380 and 0x480 slb miss interrupts */
-EXC_COMMON_BEGIN(slb_miss_realmode)
+/*
+ * This handler is used by the 0x380 and 0x480 SLB miss interrupts, as well as
+ * the virtual mode 0x4380 and 0x4480 interrupts if AIL is enabled.
+ */
+EXC_COMMON_BEGIN(slb_miss_common)
/*
* r13 points to the PACA, r9 contains the saved CR,
* r12 contains the saved r3,
--
2.26.2