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Tue, 7 Nov 2017 20:00:27 +0000 (UTC) Date: Tue, 7 Nov 2017 18:00:26 -0200 From: Eduardo Habkost To: Alistair Francis Message-ID: <20171107200026.GF3111@localhost.localdomain> References: <949865c4381080ce685097390f69115d7f6ef111.1510080103.git.alistair.francis@xilinx.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <949865c4381080ce685097390f69115d7f6ef111.1510080103.git.alistair.francis@xilinx.com> X-Fnord: you can see the fnord User-Agent: Mutt/1.9.1 (2017-09-22) X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.25]); Tue, 07 Nov 2017 20:00:31 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: Re: [Qemu-arm] [PATCH v1 1/2] xlnx-zynqmp: Properly support the smp command line option X-BeenThere: qemu-arm@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: edgar.iglesias@xilinx.com, peter.maydell@linaro.org, Thomas Huth , Igor Mammedov , Igor Mitsyanko , Richard Henderson , qemu-devel@nongnu.org, f4bug@amsat.org, cota@braap.org, qemu-arm@nongnu.org, alistair23@gmail.com, Marcel Apfelbaum , Alistair Francis Errors-To: qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org Sender: "Qemu-arm" X-TUID: kb8AiixC93DZ On Tue, Nov 07, 2017 at 10:59:39AM -0800, Alistair Francis wrote: > Allow the -smp command line option to control the number of CPUs we > create. > > Signed-off-by: Alistair Francis > --- > > hw/arm/xlnx-zcu102.c | 3 ++- > hw/arm/xlnx-zynqmp.c | 26 ++++++++++++++++---------- > 2 files changed, 18 insertions(+), 11 deletions(-) > > diff --git a/hw/arm/xlnx-zcu102.c b/hw/arm/xlnx-zcu102.c > index e2d15a1c9d..7ec03dad42 100644 > --- a/hw/arm/xlnx-zcu102.c > +++ b/hw/arm/xlnx-zcu102.c > @@ -235,7 +235,8 @@ static void xlnx_zcu102_machine_class_init(ObjectClass *oc, void *data) > { > MachineClass *mc = MACHINE_CLASS(oc); > > - mc->desc = "Xilinx ZynqMP ZCU102 board"; > + mc->desc = "Xilinx ZynqMP ZCU102 board with 4xA53s and 2xR5s based on " \ > + "the value of smp"; > mc->init = xlnx_zcu102_init; > mc->block_default_type = IF_IDE; > mc->units_per_default_bus = 1; > diff --git a/hw/arm/xlnx-zynqmp.c b/hw/arm/xlnx-zynqmp.c > index d4b6560194..c707c66322 100644 > --- a/hw/arm/xlnx-zynqmp.c > +++ b/hw/arm/xlnx-zynqmp.c > @@ -98,8 +98,9 @@ static void xlnx_zynqmp_create_rpu(XlnxZynqMPState *s, const char *boot_cpu, > { > Error *err = NULL; > int i; > + int num_rpus = MIN(smp_cpus - XLNX_ZYNQMP_NUM_APU_CPUS, XLNX_ZYNQMP_NUM_RPU_CPUS); > > - for (i = 0; i < XLNX_ZYNQMP_NUM_RPU_CPUS; i++) { > + for (i = 0; i < num_rpus; i++) { > char *name; > > object_initialize(&s->rpu_cpu[i], sizeof(s->rpu_cpu[i]), > @@ -132,8 +133,9 @@ static void xlnx_zynqmp_init(Object *obj) > { > XlnxZynqMPState *s = XLNX_ZYNQMP(obj); > int i; > + int num_apus = MIN(smp_cpus, XLNX_ZYNQMP_NUM_APU_CPUS); > > - for (i = 0; i < XLNX_ZYNQMP_NUM_APU_CPUS; i++) { > + for (i = 0; i < num_apus; i++) { > object_initialize(&s->apu_cpu[i], sizeof(s->apu_cpu[i]), > "cortex-a53-" TYPE_ARM_CPU); > object_property_add_child(obj, "apu-cpu[*]", OBJECT(&s->apu_cpu[i]), > @@ -182,6 +184,7 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp) > MemoryRegion *system_memory = get_system_memory(); > uint8_t i; > uint64_t ram_size; > + int num_apus = MIN(smp_cpus, XLNX_ZYNQMP_NUM_APU_CPUS); > const char *boot_cpu = s->boot_cpu ? s->boot_cpu : "apu-cpu[0]"; > ram_addr_t ddr_low_size, ddr_high_size; > qemu_irq gic_spi[GIC_NUM_SPI_INTR]; > @@ -233,10 +236,10 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp) > > qdev_prop_set_uint32(DEVICE(&s->gic), "num-irq", GIC_NUM_SPI_INTR + 32); > qdev_prop_set_uint32(DEVICE(&s->gic), "revision", 2); > - qdev_prop_set_uint32(DEVICE(&s->gic), "num-cpu", XLNX_ZYNQMP_NUM_APU_CPUS); > + qdev_prop_set_uint32(DEVICE(&s->gic), "num-cpu", num_apus); > > /* Realize APUs before realizing the GIC. KVM requires this. */ > - for (i = 0; i < XLNX_ZYNQMP_NUM_APU_CPUS; i++) { > + for (i = 0; i < num_apus; i++) { > char *name; > > object_property_set_int(OBJECT(&s->apu_cpu[i]), QEMU_PSCI_CONDUIT_SMC, > @@ -292,7 +295,7 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp) > } > } > > - for (i = 0; i < XLNX_ZYNQMP_NUM_APU_CPUS; i++) { > + for (i = 0; i < num_apus; i++) { > qemu_irq irq; > > sysbus_connect_irq(SYS_BUS_DEVICE(&s->gic), i, > @@ -307,11 +310,14 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp) > } > > if (s->has_rpu) { > - xlnx_zynqmp_create_rpu(s, boot_cpu, &err); > - if (err) { > - error_propagate(errp, err); > - return; > - } > + info_report("The 'has_rpu' property is no longer required, to use the " > + "RPUs just use -smp 6."); > + } Is "-global driver=xlnx,,zynqmp,property=has_rpu,value=on" without an explicit -smp option supposed to be a supported configuration? 0) On current master, we have this: $ ./aarch64-softmmu/qemu-system-aarch64 -machine xlnx-zcu102 -global driver=xlnx,,zynqmp,property=has_rpu,value=on ** ERROR:/home/ehabkost/rh/proj/virt/qemu/tcg/tcg.c:538:tcg_register_thread: assertion failed: (n < max_cpus) Aborted (core dumped) 1) With your patch we have this: $ ./aarch64-softmmu/qemu-system-aarch64 -machine xlnx-zcu102 -global driver=xlnx,,zynqmp,property=has_rpu,value=on -monitor stdio QEMU 2.10.50 monitor - type 'help' for more information (qemu) qemu-system-aarch64: info: The 'has_rpu' property is no longer required, to use the RPUs just use -smp 6. (qemu) info cpus * CPU #0: thread_id=1662 (qemu) 2) With your patch plus Emilio's original min_cpus/default_cpus proposal[1], we have this: $ ./aarch64-softmmu/qemu-system-aarch64 -machine xlnx-zcu102 -global driver=xlnx,,zynqmp,property=has_rpu,value=on -monitor stdio QEMU 2.10.50 monitor - type 'help' for more information (qemu) qemu-system-aarch64: info: The 'has_rpu' property is no longer required, to use the RPUs just use -smp 6. (qemu) info cpus * CPU #0: thread_id=7112 CPU #1: (halted) thread_id=7113 CPU #2: (halted) thread_id=7114 CPU #3: (halted) thread_id=7115 (qemu) 3) With Emilio's max_additional_cpus proposal[2], we have this: $ ./aarch64-softmmu/qemu-system-aarch64 -machine xlnx-zcu102 -global driver=xlnx,,zynqmp,property=has_rpu,value=on -monitor stdio QEMU 2.10.50 monitor - type 'help' for more information (qemu) info cpus * CPU #0: thread_id=4045 CPU #1: (halted) thread_id=4046 CPU #2: (halted) thread_id=4047 CPU #3: (halted) thread_id=4048 CPU #4: (halted) thread_id=4049 CPU #5: (halted) thread_id=4050 (qemu) Which option is preferred? I like option #2 because it's simpler, but I would like to confirm this is really the intended behavior. [1] https://mid.mail-archive.com/1509734853-3014-1-git-send-email-cota@braap.org [2] https://mid.mail-archive.com/20171106215454.GB2152@flamenco > + > + xlnx_zynqmp_create_rpu(s, boot_cpu, &err); > + if (err) { > + error_propagate(errp, err); > + return; > } > > if (!s->boot_cpu_ptr) { > -- > 2.11.0 > -- Eduardo From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:49727) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eCA34-0007yQ-Pg for qemu-devel@nongnu.org; Tue, 07 Nov 2017 15:00:40 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eCA33-0000KD-FJ for qemu-devel@nongnu.org; Tue, 07 Nov 2017 15:00:38 -0500 Date: Tue, 7 Nov 2017 18:00:26 -0200 From: Eduardo Habkost Message-ID: <20171107200026.GF3111@localhost.localdomain> References: <949865c4381080ce685097390f69115d7f6ef111.1510080103.git.alistair.francis@xilinx.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <949865c4381080ce685097390f69115d7f6ef111.1510080103.git.alistair.francis@xilinx.com> Subject: Re: [Qemu-devel] [PATCH v1 1/2] xlnx-zynqmp: Properly support the smp command line option List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Alistair Francis Cc: qemu-devel@nongnu.org, peter.maydell@linaro.org, alistair23@gmail.com, edgar.iglesias@xilinx.com, edgar.iglesias@gmail.com, cota@braap.org, f4bug@amsat.org, Richard Henderson , Thomas Huth , qemu-arm@nongnu.org, Igor Mitsyanko , Marcel Apfelbaum , Igor Mammedov On Tue, Nov 07, 2017 at 10:59:39AM -0800, Alistair Francis wrote: > Allow the -smp command line option to control the number of CPUs we > create. > > Signed-off-by: Alistair Francis > --- > > hw/arm/xlnx-zcu102.c | 3 ++- > hw/arm/xlnx-zynqmp.c | 26 ++++++++++++++++---------- > 2 files changed, 18 insertions(+), 11 deletions(-) > > diff --git a/hw/arm/xlnx-zcu102.c b/hw/arm/xlnx-zcu102.c > index e2d15a1c9d..7ec03dad42 100644 > --- a/hw/arm/xlnx-zcu102.c > +++ b/hw/arm/xlnx-zcu102.c > @@ -235,7 +235,8 @@ static void xlnx_zcu102_machine_class_init(ObjectClass *oc, void *data) > { > MachineClass *mc = MACHINE_CLASS(oc); > > - mc->desc = "Xilinx ZynqMP ZCU102 board"; > + mc->desc = "Xilinx ZynqMP ZCU102 board with 4xA53s and 2xR5s based on " \ > + "the value of smp"; > mc->init = xlnx_zcu102_init; > mc->block_default_type = IF_IDE; > mc->units_per_default_bus = 1; > diff --git a/hw/arm/xlnx-zynqmp.c b/hw/arm/xlnx-zynqmp.c > index d4b6560194..c707c66322 100644 > --- a/hw/arm/xlnx-zynqmp.c > +++ b/hw/arm/xlnx-zynqmp.c > @@ -98,8 +98,9 @@ static void xlnx_zynqmp_create_rpu(XlnxZynqMPState *s, const char *boot_cpu, > { > Error *err = NULL; > int i; > + int num_rpus = MIN(smp_cpus - XLNX_ZYNQMP_NUM_APU_CPUS, XLNX_ZYNQMP_NUM_RPU_CPUS); > > - for (i = 0; i < XLNX_ZYNQMP_NUM_RPU_CPUS; i++) { > + for (i = 0; i < num_rpus; i++) { > char *name; > > object_initialize(&s->rpu_cpu[i], sizeof(s->rpu_cpu[i]), > @@ -132,8 +133,9 @@ static void xlnx_zynqmp_init(Object *obj) > { > XlnxZynqMPState *s = XLNX_ZYNQMP(obj); > int i; > + int num_apus = MIN(smp_cpus, XLNX_ZYNQMP_NUM_APU_CPUS); > > - for (i = 0; i < XLNX_ZYNQMP_NUM_APU_CPUS; i++) { > + for (i = 0; i < num_apus; i++) { > object_initialize(&s->apu_cpu[i], sizeof(s->apu_cpu[i]), > "cortex-a53-" TYPE_ARM_CPU); > object_property_add_child(obj, "apu-cpu[*]", OBJECT(&s->apu_cpu[i]), > @@ -182,6 +184,7 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp) > MemoryRegion *system_memory = get_system_memory(); > uint8_t i; > uint64_t ram_size; > + int num_apus = MIN(smp_cpus, XLNX_ZYNQMP_NUM_APU_CPUS); > const char *boot_cpu = s->boot_cpu ? s->boot_cpu : "apu-cpu[0]"; > ram_addr_t ddr_low_size, ddr_high_size; > qemu_irq gic_spi[GIC_NUM_SPI_INTR]; > @@ -233,10 +236,10 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp) > > qdev_prop_set_uint32(DEVICE(&s->gic), "num-irq", GIC_NUM_SPI_INTR + 32); > qdev_prop_set_uint32(DEVICE(&s->gic), "revision", 2); > - qdev_prop_set_uint32(DEVICE(&s->gic), "num-cpu", XLNX_ZYNQMP_NUM_APU_CPUS); > + qdev_prop_set_uint32(DEVICE(&s->gic), "num-cpu", num_apus); > > /* Realize APUs before realizing the GIC. KVM requires this. */ > - for (i = 0; i < XLNX_ZYNQMP_NUM_APU_CPUS; i++) { > + for (i = 0; i < num_apus; i++) { > char *name; > > object_property_set_int(OBJECT(&s->apu_cpu[i]), QEMU_PSCI_CONDUIT_SMC, > @@ -292,7 +295,7 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp) > } > } > > - for (i = 0; i < XLNX_ZYNQMP_NUM_APU_CPUS; i++) { > + for (i = 0; i < num_apus; i++) { > qemu_irq irq; > > sysbus_connect_irq(SYS_BUS_DEVICE(&s->gic), i, > @@ -307,11 +310,14 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp) > } > > if (s->has_rpu) { > - xlnx_zynqmp_create_rpu(s, boot_cpu, &err); > - if (err) { > - error_propagate(errp, err); > - return; > - } > + info_report("The 'has_rpu' property is no longer required, to use the " > + "RPUs just use -smp 6."); > + } Is "-global driver=xlnx,,zynqmp,property=has_rpu,value=on" without an explicit -smp option supposed to be a supported configuration? 0) On current master, we have this: $ ./aarch64-softmmu/qemu-system-aarch64 -machine xlnx-zcu102 -global driver=xlnx,,zynqmp,property=has_rpu,value=on ** ERROR:/home/ehabkost/rh/proj/virt/qemu/tcg/tcg.c:538:tcg_register_thread: assertion failed: (n < max_cpus) Aborted (core dumped) 1) With your patch we have this: $ ./aarch64-softmmu/qemu-system-aarch64 -machine xlnx-zcu102 -global driver=xlnx,,zynqmp,property=has_rpu,value=on -monitor stdio QEMU 2.10.50 monitor - type 'help' for more information (qemu) qemu-system-aarch64: info: The 'has_rpu' property is no longer required, to use the RPUs just use -smp 6. (qemu) info cpus * CPU #0: thread_id=1662 (qemu) 2) With your patch plus Emilio's original min_cpus/default_cpus proposal[1], we have this: $ ./aarch64-softmmu/qemu-system-aarch64 -machine xlnx-zcu102 -global driver=xlnx,,zynqmp,property=has_rpu,value=on -monitor stdio QEMU 2.10.50 monitor - type 'help' for more information (qemu) qemu-system-aarch64: info: The 'has_rpu' property is no longer required, to use the RPUs just use -smp 6. (qemu) info cpus * CPU #0: thread_id=7112 CPU #1: (halted) thread_id=7113 CPU #2: (halted) thread_id=7114 CPU #3: (halted) thread_id=7115 (qemu) 3) With Emilio's max_additional_cpus proposal[2], we have this: $ ./aarch64-softmmu/qemu-system-aarch64 -machine xlnx-zcu102 -global driver=xlnx,,zynqmp,property=has_rpu,value=on -monitor stdio QEMU 2.10.50 monitor - type 'help' for more information (qemu) info cpus * CPU #0: thread_id=4045 CPU #1: (halted) thread_id=4046 CPU #2: (halted) thread_id=4047 CPU #3: (halted) thread_id=4048 CPU #4: (halted) thread_id=4049 CPU #5: (halted) thread_id=4050 (qemu) Which option is preferred? I like option #2 because it's simpler, but I would like to confirm this is really the intended behavior. [1] https://mid.mail-archive.com/1509734853-3014-1-git-send-email-cota@braap.org [2] https://mid.mail-archive.com/20171106215454.GB2152@flamenco > + > + xlnx_zynqmp_create_rpu(s, boot_cpu, &err); > + if (err) { > + error_propagate(errp, err); > + return; > } > > if (!s->boot_cpu_ptr) { > -- > 2.11.0 > -- Eduardo