[1/2] target/ppc/cpu_init: Synchronize DEXCR with KVM for migration

Commit Message

Shivaprasad G Bhat June 3, 2024, 11:52 a.m. UTC

The patch enables DEXCR migration by hooking with the
"KVM one reg" ID KVM_REG_PPC_DEXCR.

Signed-off-by: Shivaprasad G Bhat <[e-mail]>
---
 linux-headers/asm-powerpc/kvm.h |    1 +
 target/ppc/cpu_init.c           |    4 ++--
 2 files changed, 3 insertions(+), 2 deletions(-)

Patch

diff --git a/linux-headers/asm-powerpc/kvm.h b/linux-headers/asm-powerpc/kvm.h
index 1691297a76..fcb947f656 100644
--- a/linux-headers/asm-powerpc/kvm.h
+++ b/linux-headers/asm-powerpc/kvm.h
@@ -645,6 +645,7 @@  struct kvm_ppc_cpu_char {
 #define KVM_REG_PPC_SIER3	(KVM_REG_PPC | KVM_REG_SIZE_U64 | 0xc3)
 #define KVM_REG_PPC_DAWR1	(KVM_REG_PPC | KVM_REG_SIZE_U64 | 0xc4)
 #define KVM_REG_PPC_DAWRX1	(KVM_REG_PPC | KVM_REG_SIZE_U64 | 0xc5)
+#define KVM_REG_PPC_DEXCR	(KVM_REG_PPC | KVM_REG_SIZE_U64 | 0xc6)
 
 /* Transactional Memory checkpointed state:
  * This is all GPRs, all VSX regs and a subset of SPRs
diff --git a/target/ppc/cpu_init.c b/target/ppc/cpu_init.c
index c11a69fd90..b1422c2eab 100644
--- a/target/ppc/cpu_init.c
+++ b/target/ppc/cpu_init.c
@@ -5818,9 +5818,9 @@  static void register_power10_hash_sprs(CPUPPCState *env)
 
 static void register_power10_dexcr_sprs(CPUPPCState *env)
 {
-    spr_register(env, SPR_DEXCR, "DEXCR",
+    spr_register_kvm(env, SPR_DEXCR, "DEXCR",
             SPR_NOACCESS, SPR_NOACCESS,
-            &spr_read_generic, &spr_write_generic,
+            &spr_read_generic, &spr_write_generic, KVM_REG_PPC_DEXCR,
             0);
 
     spr_register(env, SPR_UDEXCR, "UDEXCR",