From 277ee17212f0ac965d1fb7d65d8f938a790229ad Mon Sep 17 00:00:00 2001 From: Nicholas Piggin Date: Tue, 16 May 2023 02:02:01 +1000 Subject: target/ppc: Add POWER9 DD2.2 model POWER9 DD2.1 and earlier had significant limitations when running KVM, including lack of "mixed mode" MMU support (ability to run HPT and RPT mode on threads of the same core), and a translation prefetch issue which is worked around by disabling "AIL" mode for the guest. These processors are not widely available, and it's difficult to deal with all these quirks in qemu +/- KVM, so create a POWER9 DD2.2 CPU and make it the default POWER9 CPU. Signed-off-by: Nicholas Piggin Reviewed-by: Frederic Barrat Reviewed-by: Harsh Prateek Bora Message-Id: <20230515160201.394587-1-npiggin@gmail.com> Signed-off-by: Daniel Henrique Barboza --- target/ppc/cpu-models.c | 4 +++- target/ppc/cpu-models.h | 1 + target/ppc/cpu_init.c | 21 +++++++++++++++++++-- 3 files changed, 23 insertions(+), 3 deletions(-) (limited to 'target') diff --git a/target/ppc/cpu-models.c b/target/ppc/cpu-models.c index 912b037..7dbb47d 100644 --- a/target/ppc/cpu-models.c +++ b/target/ppc/cpu-models.c @@ -732,6 +732,8 @@ "POWER9 v1.0") POWERPC_DEF("power9_v2.0", CPU_POWERPC_POWER9_DD20, POWER9, "POWER9 v2.0") + POWERPC_DEF("power9_v2.2", CPU_POWERPC_POWER9_DD22, POWER9, + "POWER9 v2.2") POWERPC_DEF("power10_v1.0", CPU_POWERPC_POWER10_DD1, POWER10, "POWER10 v1.0") POWERPC_DEF("power10_v2.0", CPU_POWERPC_POWER10_DD20, POWER10, @@ -907,7 +909,7 @@ PowerPCCPUAlias ppc_cpu_aliases[] = { { "power8e", "power8e_v2.1" }, { "power8", "power8_v2.0" }, { "power8nvl", "power8nvl_v1.0" }, - { "power9", "power9_v2.0" }, + { "power9", "power9_v2.2" }, { "power10", "power10_v2.0" }, #endif diff --git a/target/ppc/cpu-models.h b/target/ppc/cpu-models.h index a77e036..572b5e5 100644 --- a/target/ppc/cpu-models.h +++ b/target/ppc/cpu-models.h @@ -350,6 +350,7 @@ enum { CPU_POWERPC_POWER9_BASE = 0x004E0000, CPU_POWERPC_POWER9_DD1 = 0x004E1100, CPU_POWERPC_POWER9_DD20 = 0x004E1200, + CPU_POWERPC_POWER9_DD22 = 0x004E1202, CPU_POWERPC_POWER10_BASE = 0x00800000, CPU_POWERPC_POWER10_DD1 = 0x00801100, CPU_POWERPC_POWER10_DD20 = 0x00801200, diff --git a/target/ppc/cpu_init.c b/target/ppc/cpu_init.c index 5aa0b3f..05bf732 100644 --- a/target/ppc/cpu_init.c +++ b/target/ppc/cpu_init.c @@ -6284,9 +6284,26 @@ static bool ppc_pvr_match_power9(PowerPCCPUClass *pcc, uint32_t pvr, bool best) return false; } - if ((pvr & 0x0f00) == (pcc->pvr & 0x0f00)) { - /* Major DD version matches to power9_v1.0 and power9_v2.0 */ + if ((pvr & 0x0f00) != (pcc->pvr & 0x0f00)) { + /* Major DD version does not match */ + return false; + } + + if ((pvr & 0x0f00) == 0x100) { + /* DD1.x always matches power9_v1.0 */ return true; + } else if ((pvr & 0x0f00) == 0x200) { + if ((pvr & 0xf) < 2) { + /* DD2.0, DD2.1 match power9_v2.0 */ + if ((pcc->pvr & 0xf) == 0) { + return true; + } + } else { + /* DD2.2, DD2.3 match power9_v2.2 */ + if ((pcc->pvr & 0xf) == 2) { + return true; + } + } } return false; -- cgit v1.1