From: Simon Guo <wei.guo.simon@xxxxxxxxx>
This patch adds 2 new APIs kvmppc_save_tm_sprs()/kvmppc_restore_tm_sprs()
for the purpose of TEXASR/TFIAR/TFHAR save/restore.
Signed-off-by: Simon Guo <wei.guo.simon@xxxxxxxxx>
Reviewed-by: Paul Mackerras <paulus@xxxxxxxxxx>
---
arch/powerpc/kvm/book3s_pr.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c
index f2ae5a3..7d4905a 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 @@ 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 */
--
1.8.3.1
