From a22a2daccfa3ade5cdd9ef1e8a05cf1e6ffca42b Mon Sep 17 00:00:00 2001 From: Alexander Graf Date: Tue, 7 Jun 2011 20:45:34 +0200 Subject: [PATCH] KVM: PPC: Resolve real-mode handlers through function exports Up until now, Book3S KVM had variables stored in the kernel that a kernel module or the kvm code in the kernel could read from to figure out where some real mode helper functions are located. This is all unnecessary. The high bits of the EA get ignore in real mode, so we can just use the pointer as is. Also, it's a lot easier on relocations when we use the normal way of resolving the address to a function, instead of jumping through hoops. This patch fixes compilation with CONFIG_RELOCATABLE=y. Signed-off-by: Alexander Graf --- arch/powerpc/include/asm/kvm_book3s.h | 4 ++-- arch/powerpc/kvm/book3s.c | 4 ++-- arch/powerpc/kvm/book3s_exports.c | 4 ++-- arch/powerpc/kvm/book3s_rmhandlers.S | 8 -------- 4 files changed, 6 insertions(+), 14 deletions(-) diff --git a/arch/powerpc/include/asm/kvm_book3s.h b/arch/powerpc/include/asm/kvm_book3s.h index d62e703f1214..70c409b1d931 100644 --- a/arch/powerpc/include/asm/kvm_book3s.h +++ b/arch/powerpc/include/asm/kvm_book3s.h @@ -133,8 +133,8 @@ extern void kvmppc_giveup_ext(struct kvm_vcpu *vcpu, ulong msr); extern int kvmppc_emulate_paired_single(struct kvm_run *run, struct kvm_vcpu *vcpu); extern pfn_t kvmppc_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn); -extern ulong kvmppc_trampoline_lowmem; -extern ulong kvmppc_trampoline_enter; +extern void kvmppc_handler_lowmem_trampoline(void); +extern void kvmppc_handler_trampoline_enter(void); extern void kvmppc_rmcall(ulong srr0, ulong srr1); extern void kvmppc_load_up_fpu(void); extern void kvmppc_load_up_altivec(void); diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c index 0f95b5cce033..73fdab8a567f 100644 --- a/arch/powerpc/kvm/book3s.c +++ b/arch/powerpc/kvm/book3s.c @@ -1342,8 +1342,8 @@ struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id) vcpu_book3s->slb_nr = 64; /* remember where some real-mode handlers are */ - vcpu->arch.trampoline_lowmem = kvmppc_trampoline_lowmem; - vcpu->arch.trampoline_enter = kvmppc_trampoline_enter; + vcpu->arch.trampoline_lowmem = (ulong)kvmppc_handler_lowmem_trampoline; + vcpu->arch.trampoline_enter = (ulong)kvmppc_handler_trampoline_enter; vcpu->arch.highmem_handler = (ulong)kvmppc_handler_highmem; #ifdef CONFIG_PPC_BOOK3S_64 vcpu->arch.rmcall = *(ulong*)kvmppc_rmcall; diff --git a/arch/powerpc/kvm/book3s_exports.c b/arch/powerpc/kvm/book3s_exports.c index 1dd5a1ddfd0d..f94fd9a4c69a 100644 --- a/arch/powerpc/kvm/book3s_exports.c +++ b/arch/powerpc/kvm/book3s_exports.c @@ -20,8 +20,8 @@ #include #include -EXPORT_SYMBOL_GPL(kvmppc_trampoline_enter); -EXPORT_SYMBOL_GPL(kvmppc_trampoline_lowmem); +EXPORT_SYMBOL_GPL(kvmppc_handler_trampoline_enter); +EXPORT_SYMBOL_GPL(kvmppc_handler_lowmem_trampoline); EXPORT_SYMBOL_GPL(kvmppc_rmcall); EXPORT_SYMBOL_GPL(kvmppc_load_up_fpu); #ifdef CONFIG_ALTIVEC diff --git a/arch/powerpc/kvm/book3s_rmhandlers.S b/arch/powerpc/kvm/book3s_rmhandlers.S index 1a1b34487e71..5f5d07475c91 100644 --- a/arch/powerpc/kvm/book3s_rmhandlers.S +++ b/arch/powerpc/kvm/book3s_rmhandlers.S @@ -251,12 +251,4 @@ define_load_up(altivec) define_load_up(vsx) #endif -.global kvmppc_trampoline_lowmem -kvmppc_trampoline_lowmem: - PPC_LONG kvmppc_handler_lowmem_trampoline - CONFIG_KERNEL_START - -.global kvmppc_trampoline_enter -kvmppc_trampoline_enter: - PPC_LONG kvmppc_handler_trampoline_enter - CONFIG_KERNEL_START - #include "book3s_segment.S" -- 2.20.1