Commit-ID: 20a8378aa9dd108a01cb0e695599f5257a885c4b Gitweb: https://git.kernel.org/tip/20a8378aa9dd108a01cb0e695599f5257a885c4b Author: Mike Travis <[email protected]> AuthorDate: Tue, 2 Oct 2018 13:01:45 -0500 Committer: Thomas Gleixner <[email protected]> CommitDate: Tue, 2 Oct 2018 21:29:16 +0200
x86/platform/uv: Provide is_early_uv_system() Introduce is_early_uv_system() which uses efi.uv_systab to decide early in the boot process whether the kernel runs on a UV system. This is needed to skip other early setup/init code that might break the UV platform if done too early such as before necessary ACPI tables parsing takes place. Suggested-by: Hedi Berriche <[email protected]> Signed-off-by: Mike Travis <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Reviewed-by: Russ Anderson <[email protected]> Reviewed-by: Dimitri Sivanich <[email protected]> Cc: "H. Peter Anvin" <[email protected]> Cc: Russ Anderson <[email protected]> Cc: Dimitri Sivanich <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Kate Stewart <[email protected]> Cc: Greg Kroah-Hartman <[email protected]> Cc: Philippe Ombredanne <[email protected]> Cc: Pavel Tatashin <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Len Brown <[email protected]> Cc: Dou Liyang <[email protected]> Cc: Xiaoming Gao <[email protected]> Cc: Rajvi Jingar <[email protected]> Link: https://lkml.kernel.org/r/[email protected] --- arch/x86/include/asm/uv/uv.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/x86/include/asm/uv/uv.h b/arch/x86/include/asm/uv/uv.h index a80c0673798f..e60c45fd3679 100644 --- a/arch/x86/include/asm/uv/uv.h +++ b/arch/x86/include/asm/uv/uv.h @@ -10,8 +10,13 @@ struct cpumask; struct mm_struct; #ifdef CONFIG_X86_UV +#include <linux/efi.h> extern enum uv_system_type get_uv_system_type(void); +static inline bool is_early_uv_system(void) +{ + return !((efi.uv_systab == EFI_INVALID_TABLE_ADDR) || !efi.uv_systab); +} extern int is_uv_system(void); extern int is_uv_hubless(void); extern void uv_cpu_init(void); @@ -23,6 +28,7 @@ extern const struct cpumask *uv_flush_tlb_others(const struct cpumask *cpumask, #else /* X86_UV */ static inline enum uv_system_type get_uv_system_type(void) { return UV_NONE; } +static inline bool is_early_uv_system(void) { return 0; } static inline int is_uv_system(void) { return 0; } static inline int is_uv_hubless(void) { return 0; } static inline void uv_cpu_init(void) { }
