[PATCH V8 24/44] x86/entry: Define arch_{save|restore}_auxiliary_pt_regs()

ira.weiny
2022-01-27T17:56:15Z

From: Ira Weiny <ira.weiny@intel.com>

The x86 architecture supports the new auxiliary pt_regs space if
ARCH_HAS_PTREGS_AUXILIARY is enabled.

Define the callbacks within the x86 code required by the core entry code
when this support is enabled.

Signed-off-by: Ira Weiny <ira.weiny@intel.com>

---
Changes for V8
New patch
---
arch/x86/include/asm/entry-common.h | 12 ++++++++++++
1 file changed, 12 insertions(+)

diff --git a/arch/x86/include/asm/entry-common.h b/arch/x86/include/asm/entry-common.h
index 43184640b579..5fa5dd2d539c 100644
--- a/arch/x86/include/asm/entry-common.h
+++ b/arch/x86/include/asm/entry-common.h
@@ -95,4 +95,16 @@ static __always_inline void arch_exit_to_user_mode(void)
}
#define arch_exit_to_user_mode arch_exit_to_user_mode

+#ifdef CONFIG_ARCH_HAS_PTREGS_AUXILIARY
+
+static inline void arch_save_aux_pt_regs(struct pt_regs *regs)
+{
+}
+
+static inline void arch_restore_aux_pt_regs(struct pt_regs *regs)
+{
+}
+
+#endif
+
#endif
--
2.31.1