[ Upstream commit 94bccc34071094c165c79b515d21b63c78f7e968 ]
iscsi_ibft can use ACPI to find the iBFT entry during bootup, currently, ISCSI_IBFT depends on ISCSI_IBFT_FIND which is a X86 legacy way to find the iBFT by searching through the low memory. This patch changes the dependency so that other arch like ARM64 can use ISCSI_IBFT as long as the arch supports ACPI.
ibft_init() needs to use the global variable ibft_addr declared in iscsi_ibft_find.c. A #ifndef CONFIG_ISCSI_IBFT_FIND is needed to declare the variable if CONFIG_ISCSI_IBFT_FIND is not selected. Moving ibft_addr into the iscsi_ibft.c does not work because if ISCSI_IBFT is selected as a module, the arch/x86/kernel/setup.c won't be able to find the variable at compile time.
Signed-off-by: Thomas Tai thomas.tai@oracle.com Signed-off-by: Konrad Rzeszutek Wilk konrad.wilk@oracle.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/firmware/Kconfig | 5 +++-- drivers/firmware/iscsi_ibft.c | 4 ++++ 2 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig index cf478fe6b335b..b0d42234fba0e 100644 --- a/drivers/firmware/Kconfig +++ b/drivers/firmware/Kconfig @@ -135,7 +135,7 @@ config DMI_SCAN_MACHINE_NON_EFI_FALLBACK
config ISCSI_IBFT_FIND bool "iSCSI Boot Firmware Table Attributes" - depends on X86 && ACPI + depends on X86 && ISCSI_IBFT default n help This option enables the kernel to find the region of memory @@ -146,7 +146,8 @@ config ISCSI_IBFT_FIND config ISCSI_IBFT tristate "iSCSI Boot Firmware Table Attributes module" select ISCSI_BOOT_SYSFS - depends on ISCSI_IBFT_FIND && SCSI && SCSI_LOWLEVEL + select ISCSI_IBFT_FIND if X86 + depends on ACPI && SCSI && SCSI_LOWLEVEL default n help This option enables support for detection and exposing of iSCSI diff --git a/drivers/firmware/iscsi_ibft.c b/drivers/firmware/iscsi_ibft.c index 437c8ef90643b..30d67fbe00c73 100644 --- a/drivers/firmware/iscsi_ibft.c +++ b/drivers/firmware/iscsi_ibft.c @@ -93,6 +93,10 @@ MODULE_DESCRIPTION("sysfs interface to BIOS iBFT information"); MODULE_LICENSE("GPL"); MODULE_VERSION(IBFT_ISCSI_VERSION);
+#ifndef CONFIG_ISCSI_IBFT_FIND +struct acpi_table_ibft *ibft_addr; +#endif + struct ibft_hdr { u8 id; u8 version;