From 64e413515ce1e731b87f704cf0d8d9768f0bd8c8 Mon Sep 17 00:00:00 2001 From: Nicholas Piggin Date: Sat, 22 Jun 2019 23:15:29 +1000 Subject: [PATCH] powerpc/64s/exception: remove __BRANCH_TO_KVM No generated code change. Signed-off-by: Nicholas Piggin Signed-off-by: Michael Ellerman --- arch/powerpc/kernel/exceptions-64s.S | 43 ++++++++++++---------------- 1 file changed, 18 insertions(+), 25 deletions(-) diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S index ba2ecbd06c72..c354bb9606b8 100644 --- a/arch/powerpc/kernel/exceptions-64s.S +++ b/arch/powerpc/kernel/exceptions-64s.S @@ -243,29 +243,6 @@ END_FTR_SECTION_NESTED(ftr,ftr,943) #endif #ifdef CONFIG_KVM_BOOK3S_64_HANDLER - -#ifdef CONFIG_RELOCATABLE -/* - * KVM requires __LOAD_FAR_HANDLER. - * - * __BRANCH_TO_KVM_EXIT branches are also a special case because they - * explicitly use r9 then reload it from PACA before branching. Hence - * the double-underscore. - */ -#define __BRANCH_TO_KVM_EXIT(area, label) \ - mfctr r9; \ - std r9,HSTATE_SCRATCH1(r13); \ - __LOAD_FAR_HANDLER(r9, label); \ - mtctr r9; \ - ld r9,area+EX_R9(r13); \ - bctr - -#else -#define __BRANCH_TO_KVM_EXIT(area, label) \ - ld r9,area+EX_R9(r13); \ - b label -#endif - #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE /* * If hv is possible, interrupts come into to the hv version @@ -311,8 +288,24 @@ END_FTR_SECTION_NESTED(ftr,ftr,943) .else ori r12,r12,(\n) .endif - /* This reloads r9 before branching to kvmppc_interrupt */ - __BRANCH_TO_KVM_EXIT(\area, kvmppc_interrupt) + +#ifdef CONFIG_RELOCATABLE + /* + * KVM requires __LOAD_FAR_HANDLER beause kvmppc_interrupt lives + * outside the head section. CONFIG_RELOCATABLE KVM expects CTR + * to be saved in HSTATE_SCRATCH1. + */ + mfctr r9 + std r9,HSTATE_SCRATCH1(r13) + __LOAD_FAR_HANDLER(r9, kvmppc_interrupt) + mtctr r9 + ld r9,\area+EX_R9(r13) + bctr +#else + ld r9,\area+EX_R9(r13) + b kvmppc_interrupt +#endif + .if \skip 89: mtocrf 0x80,r9 -- 2.25.1