Hi Marc, On 06/22/2016 09:34 PM, Hanjun Guo wrote: > On 2016/6/22 22:51, Marc Zyngier wrote: >> On 22/06/16 14:52, Tomasz Nowicki wrote: >>> On 22.06.2016 15:25, Marc Zyngier wrote: >>>> On 22/06/16 13:35, Tomasz Nowicki wrote: >>>>> IORT shows representation of IO topology for ARM based systems. >>>>> It describes how various components are connected together on >>>>> parent-child basis e.g. PCI RC -> SMMU -> ITS. Also see IORT spec. >>>>> http://infocenter.arm.com/help/topic/com.arm.doc.den0049b/DEN0049B_IO_Remapping_Table.pdf >>>>> >>>>> Initial support allows to detect IORT table presence and save its >>>>> root pointer obtained through acpi_get_table(). The pointer validity >>>>> depends on acpi_gbl_permanent_mmap because if acpi_gbl_permanent_mmap >>>>> is not set while using IORT nodes we would dereference unmapped pointers. >>>>> >>>>> For the aforementioned reason call iort_table_detect() from acpi_init() >>>>> which guarantees acpi_gbl_permanent_mmap to be set at that point. >>>>> >>>>> Add generic helpers which are helpful for scanning and retrieving >>>>> information from IORT table content. List of the most important helpers: >>>>> - iort_find_dev_node() finds IORT node for a given device >>>>> - iort_node_map_rid() maps device RID and returns IORT node which provides >>>>> final translation >>>>> >>>>> Signed-off-by: Tomasz Nowicki <tn@xxxxxxxxxxxx> >>>>> --- >>>>> drivers/acpi/Kconfig | 3 + >>>>> drivers/acpi/Makefile | 1 + >>>>> drivers/acpi/bus.c | 2 + >>>>> drivers/acpi/iort.c | 217 ++++++++++++++++++++++++++++++++++++++++++++++++++ >>>>> include/linux/iort.h | 30 +++++++ >>>>> 5 files changed, 253 insertions(+) >>>>> create mode 100644 drivers/acpi/iort.c >>>>> create mode 100644 include/linux/iort.h > I tracked Marc's tree on git.kernel.org, it's acpi_os_free(buffer.pointer) there so > my worry is gone :) Do you plan on submitting this during the 4.8 merge window? Thanks, Cov -- Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc. Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project. -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
