Subject: [PATCH 08/17] powerpc/64s/exception: KVM handler can set the HSRR trap bit

From: Nicholas Piggin <[email-masked]>
Date: Tue, 5 Feb 2019 00:18:19 +1000

Move the KVM trap HSRR bit, into the KVM handler, which can be
conditionally applied when hsrr parameter is set.

Signed-off-by: Nicholas Piggin <[email-masked]>
---
 arch/powerpc/include/asm/exception-64s.h | 5 +++++
 arch/powerpc/include/asm/head-64.h       | 7 ++-----
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/arch/powerpc/include/asm/exception-64s.h b/arch/powerpc/include/asm/exception-64s.h
index cecef7166a0c..c78d9b1bf22d 100644
--- a/arch/powerpc/include/asm/exception-64s.h
+++ b/arch/powerpc/include/asm/exception-64s.h
@@ -453,7 +453,12 @@ END_FTR_SECTION_NESTED(ftr,ftr,943)
 	ld	r10,\area+EX_R10(r13)
 	std	r12,HSTATE_SCRATCH0(r13)
 	sldi	r12,r9,32
+	/* HSRR variants have the 0x2 bit added to their trap number */
+	.if \hsrr
+	ori	r12,r12,(\n + 0x2)
+	.else
 	ori	r12,r12,(\n)
+	.endif
 	/* This reloads r9 before branching to kvmppc_interrupt */
 	__BRANCH_TO_KVM_EXIT(\area, kvmppc_interrupt)
 
diff --git a/arch/powerpc/include/asm/head-64.h b/arch/powerpc/include/asm/head-64.h
index 518d9758b41e..bdd67a26e959 100644
--- a/arch/powerpc/include/asm/head-64.h
+++ b/arch/powerpc/include/asm/head-64.h
@@ -393,16 +393,13 @@ end_##sname:
 	TRAMP_KVM_BEGIN(do_kvm_##n);					\
 	KVM_HANDLER area, EXC_STD, n, 1
 
-/*
- * HV variant exceptions get the 0x2 bit added to their trap number.
- */
 #define TRAMP_KVM_HV(area, n)						\
 	TRAMP_KVM_BEGIN(do_kvm_H##n);					\
-	KVM_HANDLER area, EXC_HV, n + 0x2, 0
+	KVM_HANDLER area, EXC_HV, n, 0
 
 #define TRAMP_KVM_HV_SKIP(area, n)					\
 	TRAMP_KVM_BEGIN(do_kvm_H##n);					\
-	KVM_HANDLER area, EXC_HV, n + 0x2, 1
+	KVM_HANDLER area, EXC_HV, n, 1
 
 #define EXC_COMMON(name, realvec, hdlr)					\
 	EXC_COMMON_BEGIN(name);						\
-- 
2.18.0