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[213.175.37.12]) by smtp.gmail.com with ESMTPSA id n68sm16106200wmn.13.2021.10.04.02.44.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 04 Oct 2021 02:44:09 -0700 (PDT) Date: Mon, 4 Oct 2021 11:44:08 +0200 From: Andrew Jones To: Marc Zyngier Subject: Re: [PATCH v2 2/5] hw/arm/virt: Add a control for the the highmem redistributors Message-ID: <20211004094408.xfftmls7h6bbypuk@gator> References: <20211003164605.3116450-1-maz@kernel.org> <20211003164605.3116450-3-maz@kernel.org> MIME-Version: 1.0 In-Reply-To: <20211003164605.3116450-3-maz@kernel.org> Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=drjones@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Received-SPF: pass client-ip=170.10.133.124; envelope-from=drjones@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.055, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , kvm@vger.kernel.org, qemu-devel@nongnu.org, Eric Auger , kernel-team@android.com, kvmarm@lists.cs.columbia.edu Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Sun, Oct 03, 2021 at 05:46:02PM +0100, Marc Zyngier wrote: > Just like we can control the enablement of the highmem PCIe region > using highmem_ecam, let's add a control for the highmem GICv3 > redistributor region. > > Similarily to highmem_ecam, these redistributors are disabled when > highmem is off. > > Signed-off-by: Marc Zyngier > --- > hw/arm/virt-acpi-build.c | 2 ++ > hw/arm/virt.c | 3 +++ > include/hw/arm/virt.h | 4 +++- > 3 files changed, 8 insertions(+), 1 deletion(-) > > diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c > index d7bef0e627..f0d0b662b7 100644 > --- a/hw/arm/virt-acpi-build.c > +++ b/hw/arm/virt-acpi-build.c > @@ -792,6 +792,8 @@ void virt_acpi_build(VirtMachineState *vms, AcpiBuildTables *tables) > acpi_add_table(table_offsets, tables_blob); > build_fadt_rev5(tables_blob, tables->linker, vms, dsdt); > > + vms->highmem_redists &= vms->highmem; > + > acpi_add_table(table_offsets, tables_blob); > build_madt(tables_blob, tables->linker, vms); > > diff --git a/hw/arm/virt.c b/hw/arm/virt.c > index 8021d545c3..bcf58f677d 100644 > --- a/hw/arm/virt.c > +++ b/hw/arm/virt.c > @@ -2053,6 +2053,8 @@ static void machvirt_init(MachineState *machine) > > virt_flash_fdt(vms, sysmem, secure_sysmem ?: sysmem); > > + vms->highmem_redists &= vms->highmem; > + > create_gic(vms, sysmem); > > virt_cpu_post_init(vms, sysmem); > @@ -2750,6 +2752,7 @@ static void virt_instance_init(Object *obj) > vms->gic_version = VIRT_GIC_VERSION_NOSEL; > > vms->highmem_ecam = !vmc->no_highmem_ecam; > + vms->highmem_redists = true; > > if (vmc->no_its) { > vms->its = false; > diff --git a/include/hw/arm/virt.h b/include/hw/arm/virt.h > index b461b8d261..787cc8a27d 100644 > --- a/include/hw/arm/virt.h > +++ b/include/hw/arm/virt.h > @@ -141,6 +141,7 @@ struct VirtMachineState { > bool secure; > bool highmem; > bool highmem_ecam; > + bool highmem_redists; > bool its; > bool tcg_its; > bool virt; > @@ -187,7 +188,8 @@ static inline int virt_gicv3_redist_region_count(VirtMachineState *vms) > > assert(vms->gic_version == VIRT_GIC_VERSION_3); > > - return MACHINE(vms)->smp.cpus > redist0_capacity ? 2 : 1; > + return (MACHINE(vms)->smp.cpus > redist0_capacity && > + vms->highmem_redists) ? 2 : 1; Wouldn't it be equivalent to just use vms->highmem here? > } > > #endif /* QEMU_ARM_VIRT_H */ > -- > 2.30.2 > Thanks, drew