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authorJuergen Gross <jgross@suse.com>2018-02-19 11:09:04 +0100
committerIngo Molnar <mingo@kernel.org>2018-02-26 08:43:20 +0100
commitdfc9327ab7c99bc13e12106448615efba833886b (patch)
treec3284f933637991743e016fc8ba0fc6ad3a2cc1c /drivers/acpi/osl.c
parent3f7df3efeb415610d27aecc282ff96d4a22f0168 (diff)
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.c5
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)