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Re: [PATCH] target/ppc: Use SMT4 small core chip type in POWER9/10 PVRs

From: Cédric Le Goater
Subject: Re: [PATCH] target/ppc: Use SMT4 small core chip type in POWER9/10 PVRs
Date: Tue, 16 May 2023 10:44:54 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.10.0

On 5/15/23 18:01, Nicholas Piggin wrote:
QEMU's PVR value for POWER9 DD2.0 has chip type 1, which is the SMT4
"small core" type that OpenPOWER processors use. QEMU's PVR for all
other POWER9/10 have chip type 0, which "enterprise" systems use.

The difference does not really matter to QEMU (because it does not care
about SMT mode in the target), but for consistency all PVRs should use
the same chip type. We'll go with the SMT4 OpenPOWER type.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
This is a replacement for


But the chip type is changed to 1 instead of 0, because that's the
more familiar SM4 / small core CPU.

Will small cores POWER10 CPU be available ?




  target/ppc/cpu-models.h | 6 +++---
  1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/target/ppc/cpu-models.h b/target/ppc/cpu-models.h
index 1326493a9a..a77e036b3a 100644
--- a/target/ppc/cpu-models.h
+++ b/target/ppc/cpu-models.h
@@ -348,11 +348,11 @@ enum {
      CPU_POWERPC_POWER8NVL_BASE     = 0x004C0000,
      CPU_POWERPC_POWER8NVL_v10      = 0x004C0100,
      CPU_POWERPC_POWER9_BASE        = 0x004E0000,
-    CPU_POWERPC_POWER9_DD1         = 0x004E0100,
+    CPU_POWERPC_POWER9_DD1         = 0x004E1100,
      CPU_POWERPC_POWER9_DD20        = 0x004E1200,
      CPU_POWERPC_POWER10_BASE       = 0x00800000,
-    CPU_POWERPC_POWER10_DD1        = 0x00800100,
-    CPU_POWERPC_POWER10_DD20       = 0x00800200,
+    CPU_POWERPC_POWER10_DD1        = 0x00801100,
+    CPU_POWERPC_POWER10_DD20       = 0x00801200,
      CPU_POWERPC_970_v22            = 0x00390202,
      CPU_POWERPC_970FX_v10          = 0x00391100,
      CPU_POWERPC_970FX_v20          = 0x003C0200,

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