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Wed, 26 Jan 2022 03:45:58 -0800 (PST) Date: Wed, 26 Jan 2022 17:15:49 +0530 From: Sunil V L To: Ard Biesheuvel Cc: Paul Walmsley , Palmer Dabbelt , Albert Ou , linux-efi , Linux Kernel Mailing List , linux-riscv , Heinrich Schuchardt , Anup Patel , Atish Patra , Abner Chang , Jessica Clarke Subject: Re: [RFC PATCH 1/1] riscv/efi_stub: Add support for RISCV_EFI_BOOT_PROTOCOL Message-ID: <20220126114549.GA35654@sunil-ThinkPad-T490> References: <20220126110615.33371-1-sunilvl@ventanamicro.com> <20220126110615.33371-2-sunilvl@ventanamicro.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220126_034559_509022_7AEB11F9 X-CRM114-Status: GOOD ( 23.41 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org On Wed, Jan 26, 2022 at 12:13:42PM +0100, Ard Biesheuvel wrote: > Hello Sunil, > > On Wed, 26 Jan 2022 at 12:06, Sunil V L wrote: > > > > This patch adds the support for getting the boot hart ID in > > Linux EFI stub using RISCV_EFI_BOOT_PROTOCOL. > > > > Signed-off-by: Sunil V L > > --- > > drivers/firmware/efi/libstub/efistub.h | 15 ++++++++++++ > > drivers/firmware/efi/libstub/riscv-stub.c | 28 ++++++++++++++++++++--- > > include/linux/efi.h | 1 + > > 3 files changed, 41 insertions(+), 3 deletions(-) > > > > diff --git a/drivers/firmware/efi/libstub/efistub.h b/drivers/firmware/efi/libstub/efistub.h > > index edb77b0621ea..0428f8816942 100644 > > --- a/drivers/firmware/efi/libstub/efistub.h > > +++ b/drivers/firmware/efi/libstub/efistub.h > > @@ -720,6 +720,21 @@ union efi_tcg2_protocol { > > } mixed_mode; > > }; > > > > +typedef union riscv_efi_boot_protocol riscv_efi_boot_protocol_t; > > + > > +union riscv_efi_boot_protocol { > > + struct { > > + u64 revision; > > + efi_status_t (__efiapi *get_boot_hartid)( > > + riscv_efi_boot_protocol_t *, > > + size_t *); > > + }; > > + struct { > > + u32 revision; > > + u32 get_boot_hartid; > > + } mixed_mode; > > +}; > > + > > You don't the mixed mode member here - this is for X64 kernels on IA32 > firmware only. Ah OK. Thanks for the feedback, Ard. Will remove it in next version. Thanks Sunil > > > typedef union efi_load_file_protocol efi_load_file_protocol_t; > > typedef union efi_load_file_protocol efi_load_file2_protocol_t; > > > > diff --git a/drivers/firmware/efi/libstub/riscv-stub.c b/drivers/firmware/efi/libstub/riscv-stub.c > > index 380e4e251399..c7add4eb5453 100644 > > --- a/drivers/firmware/efi/libstub/riscv-stub.c > > +++ b/drivers/firmware/efi/libstub/riscv-stub.c > > @@ -46,12 +46,34 @@ static u32 get_boot_hartid_from_fdt(void) > > return fdt32_to_cpu(*prop); > > } > > > > +static u32 get_boot_hartid_from_efi(void) > > +{ > > + efi_guid_t boot_protocol_guid = RISCV_EFI_BOOT_PROTOCOL_GUID; > > + efi_status_t status; > > + riscv_efi_boot_protocol_t *boot_protocol; > > + size_t boot_hart_id; > > + > > + status = efi_bs_call(locate_protocol, &boot_protocol_guid, NULL, > > + (void **)&boot_protocol); > > + if (status == EFI_SUCCESS) { > > + status = efi_call_proto(boot_protocol, > > + get_boot_hartid, &boot_hart_id); > > + if (status == EFI_SUCCESS) { > > + return (u32)boot_hart_id; > > + } > > + } > > + return U32_MAX; > > +} > > + > > efi_status_t check_platform_features(void) > > { > > - hartid = get_boot_hartid_from_fdt(); > > + hartid = get_boot_hartid_from_efi(); > > if (hartid == U32_MAX) { > > - efi_err("/chosen/boot-hartid missing or invalid!\n"); > > - return EFI_UNSUPPORTED; > > + hartid = get_boot_hartid_from_fdt(); > > + if (hartid == U32_MAX) { > > + efi_err("/chosen/boot-hartid missing or invalid!\n"); > > + return EFI_UNSUPPORTED; > > + } > > } > > return EFI_SUCCESS; > > } > > diff --git a/include/linux/efi.h b/include/linux/efi.h > > index ccd4d3f91c98..9822c730207c 100644 > > --- a/include/linux/efi.h > > +++ b/include/linux/efi.h > > @@ -380,6 +380,7 @@ void efi_native_runtime_setup(void); > > #define EFI_CONSOLE_OUT_DEVICE_GUID EFI_GUID(0xd3b36f2c, 0xd551, 0x11d4, 0x9a, 0x46, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d) > > #define APPLE_PROPERTIES_PROTOCOL_GUID EFI_GUID(0x91bd12fe, 0xf6c3, 0x44fb, 0xa5, 0xb7, 0x51, 0x22, 0xab, 0x30, 0x3a, 0xe0) > > #define EFI_TCG2_PROTOCOL_GUID EFI_GUID(0x607f766c, 0x7455, 0x42be, 0x93, 0x0b, 0xe4, 0xd7, 0x6d, 0xb2, 0x72, 0x0f) > > +#define RISCV_EFI_BOOT_PROTOCOL_GUID EFI_GUID(0xccd15fec, 0x6f73, 0x4eec, 0x83, 0x95, 0x3e, 0x69, 0xe4, 0xb9, 0x40, 0xbf) > > #define EFI_LOAD_FILE_PROTOCOL_GUID EFI_GUID(0x56ec3091, 0x954c, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b) > > #define EFI_LOAD_FILE2_PROTOCOL_GUID EFI_GUID(0x4006c0c1, 0xfcb3, 0x403e, 0x99, 0x6d, 0x4a, 0x6c, 0x87, 0x24, 0xe0, 0x6d) > > #define EFI_RT_PROPERTIES_TABLE_GUID EFI_GUID(0xeb66918a, 0x7eef, 0x402a, 0x84, 0x2e, 0x93, 0x1d, 0x21, 0xc3, 0x8a, 0xe9) > > -- > > 2.25.1 > > _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv