lkml.org 
[lkml]   [2024]   [Mar]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Date
    Subject[PATCH v2 2/2] arm64: acpi: Honour firmware_signature field of FACS, if it exists
    From: David Woodhouse <dwmw@amazon.co.uk>

    If the firmware_signature changes then OSPM should not attempt to resume
    from hibernate, but should instead perform a clean reboot. Set the global
    swsusp_hardware_signature to allow the generic code to include the value
    in the swsusp header on disk, and perform the appropriate check on resume.

    Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
    Acked-by: Sudeep Holla <sudeep.holla@arm.com>
    ---
    arch/arm64/kernel/acpi.c | 10 ++++++++++
    1 file changed, 10 insertions(+)

    diff --git a/arch/arm64/kernel/acpi.c b/arch/arm64/kernel/acpi.c
    index dba8fcec7f33..e0e7b93c16cc 100644
    --- a/arch/arm64/kernel/acpi.c
    +++ b/arch/arm64/kernel/acpi.c
    @@ -26,6 +26,7 @@
    #include <linux/libfdt.h>
    #include <linux/smp.h>
    #include <linux/serial_core.h>
    +#include <linux/suspend.h>
    #include <linux/pgtable.h>

    #include <acpi/ghes.h>
    @@ -227,6 +228,15 @@ void __init acpi_boot_table_init(void)
    if (earlycon_acpi_spcr_enable)
    early_init_dt_scan_chosen_stdout();
    } else {
    +#ifdef CONFIG_HIBERNATION
    + struct acpi_table_header *facs = NULL;
    + acpi_get_table(ACPI_SIG_FACS, 1, &facs);
    + if (facs) {
    + swsusp_hardware_signature =
    + ((struct acpi_table_facs *)facs)->hardware_signature;
    + acpi_put_table(facs);
    + }
    +#endif
    acpi_parse_spcr(earlycon_acpi_spcr_enable, true);
    if (IS_ENABLED(CONFIG_ACPI_BGRT))
    acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt);
    --
    2.44.0

    \
     
     \ /
      Last update: 2024-05-27 16:37    [W:7.327 / U:0.008 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site