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[200.162.225.121]) by smtp.gmail.com with ESMTPSA id i6-20020a056870344600b00199a7323beasm3745787oah.43.2023.05.28.09.16.01 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 28 May 2023 09:16:03 -0700 (PDT) Message-ID: Date: Sun, 28 May 2023 13:15:59 -0300 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.10.0 Subject: Re: [PATCH v4] target/ppc: Add POWER9 DD2.2 model To: Nicholas Piggin , qemu-ppc@nongnu.org Cc: qemu-devel@nongnu.org, Harsh Prateek Bora References: <20230515160201.394587-1-npiggin@gmail.com> Content-Language: en-US From: Daniel Henrique Barboza In-Reply-To: <20230515160201.394587-1-npiggin@gmail.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=2001:4860:4864:20::31; envelope-from=danielhb413@gmail.com; helo=mail-oa1-x31.google.com X-Spam_score_int: -19 X-Spam_score: -2.0 X-Spam_bar: -- X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_ENVFROM_END_DIGIT=0.25, FREEMAIL_FROM=0.001, NICE_REPLY_A=-0.093, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On 5/15/23 13:02, Nicholas Piggin wrote: > 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 > --- Patch applied cleanly on top of ppc-next so I'm queueing it. Any comments/improvements based on DD2.3 support can be done in a follow-up. Thanks, Daniel > This is unchanged since v3, just reposting. > > Thanks, > Nick > > hw/ppc/pnv.c | 2 +- > hw/ppc/pnv_core.c | 2 +- > hw/ppc/spapr.c | 2 +- > hw/ppc/spapr_cpu_core.c | 1 + > include/hw/ppc/pnv.h | 2 +- > target/ppc/cpu-models.c | 4 +++- > target/ppc/cpu-models.h | 1 + > target/ppc/cpu_init.c | 21 +++++++++++++++++++-- > tests/qtest/device-plug-test.c | 4 ++-- > 9 files changed, 30 insertions(+), 9 deletions(-) > > diff --git a/hw/ppc/pnv.c b/hw/ppc/pnv.c > index 11cb48af2f..590fc64b32 100644 > --- a/hw/ppc/pnv.c > +++ b/hw/ppc/pnv.c > @@ -2171,7 +2171,7 @@ static void pnv_machine_power9_class_init(ObjectClass *oc, void *data) > }; > > mc->desc = "IBM PowerNV (Non-Virtualized) POWER9"; > - mc->default_cpu_type = POWERPC_CPU_TYPE_NAME("power9_v2.0"); > + mc->default_cpu_type = POWERPC_CPU_TYPE_NAME("power9_v2.2"); > compat_props_add(mc->compat_props, phb_compat, G_N_ELEMENTS(phb_compat)); > > xfc->match_nvt = pnv_match_nvt; > diff --git a/hw/ppc/pnv_core.c b/hw/ppc/pnv_core.c > index 410f31bdf8..0bc3ad41c8 100644 > --- a/hw/ppc/pnv_core.c > +++ b/hw/ppc/pnv_core.c > @@ -348,7 +348,7 @@ static const TypeInfo pnv_core_infos[] = { > DEFINE_PNV_CORE_TYPE(power8, "power8e_v2.1"), > DEFINE_PNV_CORE_TYPE(power8, "power8_v2.0"), > DEFINE_PNV_CORE_TYPE(power8, "power8nvl_v1.0"), > - DEFINE_PNV_CORE_TYPE(power9, "power9_v2.0"), > + DEFINE_PNV_CORE_TYPE(power9, "power9_v2.2"), > DEFINE_PNV_CORE_TYPE(power10, "power10_v2.0"), > }; > > diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c > index ddc9c7b1a1..b58e69afd7 100644 > --- a/hw/ppc/spapr.c > +++ b/hw/ppc/spapr.c > @@ -4631,7 +4631,7 @@ static void spapr_machine_class_init(ObjectClass *oc, void *data) > > smc->dr_lmb_enabled = true; > smc->update_dt_enabled = true; > - mc->default_cpu_type = POWERPC_CPU_TYPE_NAME("power9_v2.0"); > + mc->default_cpu_type = POWERPC_CPU_TYPE_NAME("power9_v2.2"); > mc->has_hotpluggable_cpus = true; > mc->nvdimm_supported = true; > smc->resize_hpt_default = SPAPR_RESIZE_HPT_ENABLED; > diff --git a/hw/ppc/spapr_cpu_core.c b/hw/ppc/spapr_cpu_core.c > index 8a4861f45a..9b88dd549a 100644 > --- a/hw/ppc/spapr_cpu_core.c > +++ b/hw/ppc/spapr_cpu_core.c > @@ -390,6 +390,7 @@ static const TypeInfo spapr_cpu_core_type_infos[] = { > DEFINE_SPAPR_CPU_CORE_TYPE("power8nvl_v1.0"), > DEFINE_SPAPR_CPU_CORE_TYPE("power9_v1.0"), > DEFINE_SPAPR_CPU_CORE_TYPE("power9_v2.0"), > + DEFINE_SPAPR_CPU_CORE_TYPE("power9_v2.2"), > DEFINE_SPAPR_CPU_CORE_TYPE("power10_v1.0"), > DEFINE_SPAPR_CPU_CORE_TYPE("power10_v2.0"), > #ifdef CONFIG_KVM > diff --git a/include/hw/ppc/pnv.h b/include/hw/ppc/pnv.h > index 409f3bf763..7e5fef7c43 100644 > --- a/include/hw/ppc/pnv.h > +++ b/include/hw/ppc/pnv.h > @@ -48,7 +48,7 @@ DECLARE_INSTANCE_CHECKER(PnvChip, PNV_CHIP_POWER8, > DECLARE_INSTANCE_CHECKER(PnvChip, PNV_CHIP_POWER8NVL, > TYPE_PNV_CHIP_POWER8NVL) > > -#define TYPE_PNV_CHIP_POWER9 PNV_CHIP_TYPE_NAME("power9_v2.0") > +#define TYPE_PNV_CHIP_POWER9 PNV_CHIP_TYPE_NAME("power9_v2.2") > DECLARE_INSTANCE_CHECKER(PnvChip, PNV_CHIP_POWER9, > TYPE_PNV_CHIP_POWER9) > > diff --git a/target/ppc/cpu-models.c b/target/ppc/cpu-models.c > index 912b037c63..7dbb47de64 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 a77e036b3a..572b5e553a 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 0ce2e3c91d..6775828dfc 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; > diff --git a/tests/qtest/device-plug-test.c b/tests/qtest/device-plug-test.c > index 01cecd6e20..165ca13f8c 100644 > --- a/tests/qtest/device-plug-test.c > +++ b/tests/qtest/device-plug-test.c > @@ -168,8 +168,8 @@ static void test_spapr_cpu_unplug_request(void) > { > QTestState *qtest; > > - qtest = qtest_initf("-cpu power9_v2.0 -smp 1,maxcpus=2 " > - "-device power9_v2.0-spapr-cpu-core,core-id=1,id=dev0"); > + qtest = qtest_initf("-cpu power9_v2.2 -smp 1,maxcpus=2 " > + "-device power9_v2.2-spapr-cpu-core,core-id=1,id=dev0"); > > /* similar to test_pci_unplug_request */ > process_device_remove(qtest, "dev0");