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Commit 66c33e79 authored by Simon Guo's avatar Simon Guo Committed by Paul Mackerras
Browse files

KVM: PPC: Book3S PR: Add kvmppc_save/restore_tm_sprs() APIs 



This patch adds 2 new APIs, kvmppc_save_tm_sprs() and
kvmppc_restore_tm_sprs(), for the purpose of TEXASR/TFIAR/TFHAR
save/restore.

Signed-off-by: default avatarSimon Guo <wei.guo.simon@gmail.com>
Signed-off-by: default avatarPaul Mackerras <paulus@ozlabs.org>
parent de7ad932

arch/powerpc/kvm/book3s_pr.c

+22 −0
Original line number Diff line number Diff line
@@ -42,6 +42,7 @@ 
#include <linux/highmem.h>

#include <linux/module.h>

#include <linux/miscdevice.h>

#include <asm/asm-prototypes.h>



#include "book3s.h"
@@ -284,6 +285,27 @@ void kvmppc_copy_from_svcpu(struct kvm_vcpu *vcpu) 
	svcpu_put(svcpu);

}



#ifdef CONFIG_PPC_TRANSACTIONAL_MEM

static inline void kvmppc_save_tm_sprs(struct kvm_vcpu *vcpu)

{

	tm_enable();

	vcpu->arch.tfhar = mfspr(SPRN_TFHAR);

	vcpu->arch.texasr = mfspr(SPRN_TEXASR);

	vcpu->arch.tfiar = mfspr(SPRN_TFIAR);

	tm_disable();

}



static inline void kvmppc_restore_tm_sprs(struct kvm_vcpu *vcpu)

{

	tm_enable();

	mtspr(SPRN_TFHAR, vcpu->arch.tfhar);

	mtspr(SPRN_TEXASR, vcpu->arch.texasr);

	mtspr(SPRN_TFIAR, vcpu->arch.tfiar);

	tm_disable();

}



#endif



static int kvmppc_core_check_requests_pr(struct kvm_vcpu *vcpu)

{

	int r = 1; /* Indicate we want to get back into the guest */