From patchwork series 484262

https://patchwork.ozlabs.org//project/linuxppc-dev/list/?series=484262

Author: Fox Snowpatch

arch/powerpc/include/uapi/asm/kvm.h

@@ -450,11 +450,17 @@ struct kvm_ppc_cpu_char {
 #define KVM_PPC_CPU_CHAR_MTTRIG_THR_RECONF	(1ULL << 57)
 #define KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS	(1ULL << 56)
 #define KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST	(1ull << 54)
+#define KVM_PPC_CPU_CHAR_BCCTR_LINK_FLUSH_ASSIST (1ull << 52)
 
 #define KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY	(1ULL << 63)
 #define KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR		(1ULL << 62)
 #define KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR	(1ULL << 61)
+#define KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY_H	(1ull << 60)
 #define KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE	(1ull << 58)
+#define KVM_PPC_CPU_BEHAV_FLUSH_LINK_STACK	(1ull << 57)
+#define KVM_PPC_CPU_BEHAV_NO_L1D_FLUSH_ENTRY	(1ull << 56)
+#define KVM_PPC_CPU_BEHAV_NO_L1D_FLUSH_UACCESS (1ull << 55)
+#define KVM_PPC_CPU_BEHAV_NO_STF_BARRIER	(1ull << 54)
 
 /* Per-vcpu XICS interrupt controller state */
 #define KVM_REG_PPC_ICP_STATE	(KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x8c)

arch/powerpc/kvm/powerpc.c

@@ -2261,11 +2261,17 @@ static int pseries_get_cpu_char(struct kvm_ppc_cpu_char *cp)
 			KVM_PPC_CPU_CHAR_BR_HINT_HONOURED |
 			KVM_PPC_CPU_CHAR_MTTRIG_THR_RECONF |
 			KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS |
-			KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST;
+			KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST |
+			KVM_PPC_CPU_CHAR_BCCTR_LINK_FLUSH_ASSIST;
 		cp->behaviour_mask = KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY |
 			KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR |
 			KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR |
-			KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE;
+			KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY_H |
+			KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE |
+			KVM_PPC_CPU_BEHAV_FLUSH_LINK_STACK |
+			KVM_PPC_CPU_BEHAV_NO_L1D_FLUSH_ENTRY |
+			KVM_PPC_CPU_BEHAV_NO_L1D_FLUSH_UACCESS |
+			KVM_PPC_CPU_BEHAV_NO_STF_BARRIER;
 	}
 	return 0;
 }