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| author |   Juergen Gross <jgross@suse.com> | 2018-02-19 11:09:04 +0100 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2018-02-26 08:43:20 +0100 |
| commit | dfc9327ab7c99bc13e12106448615efba833886b (patch) | |
| tree | c3284f933637991743e016fc8ba0fc6ad3a2cc1c /drivers/acpi/osl.c | |
| parent | Merge tag 'v4.16-rc3' into x86/mm, to pick up fixes (diff) | |
| download | linux-dev-dfc9327ab7c99bc13e12106448615efba833886b.tar.xz linux-dev-dfc9327ab7c99bc13e12106448615efba833886b.zip | |
acpi: Introduce acpi_arch_get_root_pointer() for getting rsdp address
Add an architecture specific function to get the address of the RSDP
table. Per default it will just return 0 indicating falling back to
the current mechanism.
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: boris.ostrovsky@oracle.com
Cc: lenb@kernel.org
Cc: linux-acpi@vger.kernel.org
Cc: xen-devel@lists.xenproject.org
Link: http://lkml.kernel.org/r/20180219100906.14265-2-jgross@suse.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/acpi/osl.c')
| -rw-r--r-- | drivers/acpi/osl.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c index 3bb46cb24a99..7ca41bf023c9 100644 --- a/drivers/acpi/osl.c +++ b/drivers/acpi/osl.c @@ -189,12 +189,15 @@ early_param("acpi_rsdp", setup_acpi_rsdp); acpi_physical_address __init acpi_os_get_root_pointer(void) { - acpi_physical_address pa = 0; + acpi_physical_address pa; #ifdef CONFIG_KEXEC if (acpi_rsdp) return acpi_rsdp; #endif + pa = acpi_arch_get_root_pointer(); + if (pa) + return pa; if (efi_enabled(EFI_CONFIG_TABLES)) { if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) |