| Message ID | 20240318020916.1299190-1-haibo1.xu@intel.com |
|---|---|
| State | New |
| Headers | show |
| Series | [v2] riscv: dmi: Add SMBIOS/DMI support | expand |
On Mon, 18 Mar 2024 at 02:55, Haibo Xu <haibo1.xu@intel.com> wrote: > > Enable the dmi driver for riscv which would allow access the > SMBIOS info through some userspace file(/sys/firmware/dmi/*). > > The change was based on that of arm64 and has been verified > by dmidecode tool. > > Signed-off-by: Haibo Xu <haibo1.xu@intel.com> Reviewed-by: Ard Biesheuvel <ardb@kernel.org> > --- > Changes since v1 > - Change to use memremap/memunmap for dmi_(early)_remap/unmap > definition(suggested by Ard) > - Minor clean up for comments (Ard) > --- > arch/riscv/Kconfig | 11 +++++++++++ > arch/riscv/include/asm/dmi.h | 24 ++++++++++++++++++++++++ > drivers/firmware/efi/riscv-runtime.c | 13 +++++++++++++ > 3 files changed, 48 insertions(+) > create mode 100644 arch/riscv/include/asm/dmi.h > > diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig > index 8ebafe337eac..3639151cb4ef 100644 > --- a/arch/riscv/Kconfig > +++ b/arch/riscv/Kconfig > @@ -952,6 +952,17 @@ config EFI > allow the kernel to be booted as an EFI application. This > is only useful on systems that have UEFI firmware. > > +config DMI > + bool "Enable support for SMBIOS (DMI) tables" > + depends on EFI > + default y > + help > + This enables SMBIOS/DMI feature for systems. > + > + This option is only useful on systems that have UEFI firmware. > + However, even with this option, the resultant kernel should > + continue to boot on existing non-UEFI platforms. > + > config CC_HAVE_STACKPROTECTOR_TLS > def_bool $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=tp -mstack-protector-guard-offset=0) > > diff --git a/arch/riscv/include/asm/dmi.h b/arch/riscv/include/asm/dmi.h > new file mode 100644 > index 000000000000..ca7cce557ef7 > --- /dev/null > +++ b/arch/riscv/include/asm/dmi.h > @@ -0,0 +1,24 @@ > +/* SPDX-License-Identifier: GPL-2.0 */ > +/* > + * Copyright (C) 2024 Intel Corporation > + * > + * based on arch/arm64/include/asm/dmi.h > + * > + * This file is subject to the terms and conditions of the GNU General Public > + * License. See the file "COPYING" in the main directory of this archive > + * for more details. > + */ > + > +#ifndef __ASM_DMI_H > +#define __ASM_DMI_H > + > +#include <linux/io.h> > +#include <linux/slab.h> > + > +#define dmi_early_remap(x, l) memremap(x, l, MEMREMAP_WB) > +#define dmi_early_unmap(x, l) memunmap(x) > +#define dmi_remap(x, l) memremap(x, l, MEMREMAP_WB) > +#define dmi_unmap(x) memunmap(x) > +#define dmi_alloc(l) kzalloc(l, GFP_KERNEL) > + > +#endif > diff --git a/drivers/firmware/efi/riscv-runtime.c b/drivers/firmware/efi/riscv-runtime.c > index 09525fb5c240..c3bfb9e77e02 100644 > --- a/drivers/firmware/efi/riscv-runtime.c > +++ b/drivers/firmware/efi/riscv-runtime.c > @@ -152,3 +152,16 @@ void arch_efi_call_virt_teardown(void) > { > efi_virtmap_unload(); > } > + > +static int __init riscv_dmi_init(void) > +{ > + /* > + * On riscv, DMI depends on UEFI, and dmi_setup() needs to > + * be called early because dmi_id_init(), which is an arch_initcall > + * itself, depends on dmi_scan_machine() having been called already. > + */ > + dmi_setup(); > + > + return 0; > +} > +core_initcall(riscv_dmi_init); > -- > 2.34.1 >
On 3/17/24 19:09, Haibo Xu wrote: > Enable the dmi driver for riscv which would allow access the > SMBIOS info through some userspace file(/sys/firmware/dmi/*). > > The change was based on that of arm64 and has been verified > by dmidecode tool. > > Signed-off-by: Haibo Xu <haibo1.xu@intel.com> > --- > Changes since v1 > - Change to use memremap/memunmap for dmi_(early)_remap/unmap > definition(suggested by Ard) > - Minor clean up for comments (Ard) > --- > arch/riscv/Kconfig | 11 +++++++++++ > arch/riscv/include/asm/dmi.h | 24 ++++++++++++++++++++++++ > drivers/firmware/efi/riscv-runtime.c | 13 +++++++++++++ > 3 files changed, 48 insertions(+) > create mode 100644 arch/riscv/include/asm/dmi.h > > diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig > index 8ebafe337eac..3639151cb4ef 100644 > --- a/arch/riscv/Kconfig > +++ b/arch/riscv/Kconfig > @@ -952,6 +952,17 @@ config EFI > allow the kernel to be booted as an EFI application. This > is only useful on systems that have UEFI firmware. > > +config DMI > + bool "Enable support for SMBIOS (DMI) tables" > + depends on EFI > + default y > + help > + This enables SMBIOS/DMI feature for systems. > + > + This option is only useful on systems that have UEFI firmware. > + However, even with this option, the resultant kernel should > + continue to boot on existing non-UEFI platforms. > + > config CC_HAVE_STACKPROTECTOR_TLS > def_bool $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=tp -mstack-protector-guard-offset=0) > > diff --git a/arch/riscv/include/asm/dmi.h b/arch/riscv/include/asm/dmi.h > new file mode 100644 > index 000000000000..ca7cce557ef7 > --- /dev/null > +++ b/arch/riscv/include/asm/dmi.h > @@ -0,0 +1,24 @@ > +/* SPDX-License-Identifier: GPL-2.0 */ > +/* > + * Copyright (C) 2024 Intel Corporation > + * > + * based on arch/arm64/include/asm/dmi.h > + * > + * This file is subject to the terms and conditions of the GNU General Public > + * License. See the file "COPYING" in the main directory of this archive > + * for more details. > + */ > + > +#ifndef __ASM_DMI_H > +#define __ASM_DMI_H > + > +#include <linux/io.h> > +#include <linux/slab.h> > + > +#define dmi_early_remap(x, l) memremap(x, l, MEMREMAP_WB) > +#define dmi_early_unmap(x, l) memunmap(x) > +#define dmi_remap(x, l) memremap(x, l, MEMREMAP_WB) > +#define dmi_unmap(x) memunmap(x) > +#define dmi_alloc(l) kzalloc(l, GFP_KERNEL) > + > +#endif > diff --git a/drivers/firmware/efi/riscv-runtime.c b/drivers/firmware/efi/riscv-runtime.c > index 09525fb5c240..c3bfb9e77e02 100644 > --- a/drivers/firmware/efi/riscv-runtime.c > +++ b/drivers/firmware/efi/riscv-runtime.c > @@ -152,3 +152,16 @@ void arch_efi_call_virt_teardown(void) > { > efi_virtmap_unload(); > } > + > +static int __init riscv_dmi_init(void) > +{ > + /* > + * On riscv, DMI depends on UEFI, and dmi_setup() needs to > + * be called early because dmi_id_init(), which is an arch_initcall > + * itself, depends on dmi_scan_machine() having been called already. > + */ > + dmi_setup(); > + > + return 0; > +} > +core_initcall(riscv_dmi_init); Reviewed-by: Atish Patra <atishp@rivosinc.com>
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 8ebafe337eac..3639151cb4ef 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -952,6 +952,17 @@ config EFI allow the kernel to be booted as an EFI application. This is only useful on systems that have UEFI firmware. +config DMI + bool "Enable support for SMBIOS (DMI) tables" + depends on EFI + default y + help + This enables SMBIOS/DMI feature for systems. + + This option is only useful on systems that have UEFI firmware. + However, even with this option, the resultant kernel should + continue to boot on existing non-UEFI platforms. + config CC_HAVE_STACKPROTECTOR_TLS def_bool $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=tp -mstack-protector-guard-offset=0) diff --git a/arch/riscv/include/asm/dmi.h b/arch/riscv/include/asm/dmi.h new file mode 100644 index 000000000000..ca7cce557ef7 --- /dev/null +++ b/arch/riscv/include/asm/dmi.h @@ -0,0 +1,24 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2024 Intel Corporation + * + * based on arch/arm64/include/asm/dmi.h + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#ifndef __ASM_DMI_H +#define __ASM_DMI_H + +#include <linux/io.h> +#include <linux/slab.h> + +#define dmi_early_remap(x, l) memremap(x, l, MEMREMAP_WB) +#define dmi_early_unmap(x, l) memunmap(x) +#define dmi_remap(x, l) memremap(x, l, MEMREMAP_WB) +#define dmi_unmap(x) memunmap(x) +#define dmi_alloc(l) kzalloc(l, GFP_KERNEL) + +#endif diff --git a/drivers/firmware/efi/riscv-runtime.c b/drivers/firmware/efi/riscv-runtime.c index 09525fb5c240..c3bfb9e77e02 100644 --- a/drivers/firmware/efi/riscv-runtime.c +++ b/drivers/firmware/efi/riscv-runtime.c @@ -152,3 +152,16 @@ void arch_efi_call_virt_teardown(void) { efi_virtmap_unload(); } + +static int __init riscv_dmi_init(void) +{ + /* + * On riscv, DMI depends on UEFI, and dmi_setup() needs to + * be called early because dmi_id_init(), which is an arch_initcall + * itself, depends on dmi_scan_machine() having been called already. + */ + dmi_setup(); + + return 0; +} +core_initcall(riscv_dmi_init);
Enable the dmi driver for riscv which would allow access the SMBIOS info through some userspace file(/sys/firmware/dmi/*). The change was based on that of arm64 and has been verified by dmidecode tool. Signed-off-by: Haibo Xu <haibo1.xu@intel.com> --- Changes since v1 - Change to use memremap/memunmap for dmi_(early)_remap/unmap definition(suggested by Ard) - Minor clean up for comments (Ard) --- arch/riscv/Kconfig | 11 +++++++++++ arch/riscv/include/asm/dmi.h | 24 ++++++++++++++++++++++++ drivers/firmware/efi/riscv-runtime.c | 13 +++++++++++++ 3 files changed, 48 insertions(+) create mode 100644 arch/riscv/include/asm/dmi.h