From: Simon Guo <wei.guo.simon@gmail.com>
Date: Wed, 23 May 2018 07:01:57 +0000 (+0800)
Subject: KVM: PPC: Book3S PR: Add kvmppc_save/restore_tm_sprs() APIs
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=66c33e796cf9d5f7150bf4c701786d0527b594b6;p=openwrt%2Fstaging%2Fblogic.git

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: Simon Guo <wei.guo.simon@gmail.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
---

diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c
index 9369cd321417..92e467ebadf0 100644
--- a/arch/powerpc/kvm/book3s_pr.c
+++ b/arch/powerpc/kvm/book3s_pr.c
@@ -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 @@ out:
 	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 */