Adding upstream version 6.9.7.upstream/6.9.7

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 91 insertions, 13 deletions

diff --git a/arch/x86/include/asm/ptrace.h b/arch/x86/include/asm/ptrace.h
index f4db78b09c..5a83fbd9bc 100644
--- a/arch/x86/include/asm/ptrace.h
+++ b/arch/x86/include/asm/ptrace.h
@@ -56,18 +56,64 @@ struct pt_regs {
 
 #else /* __i386__ */
 
+struct fred_cs {
+		/* CS selector */
+	u64	cs	: 16,
+		/* Stack level at event time */
+		sl	:  2,
+		/* IBT in WAIT_FOR_ENDBRANCH state */
+		wfe	:  1,
+			: 45;
+};
+
+struct fred_ss {
+		/* SS selector */
+	u64	ss	: 16,
+		/* STI state */
+		sti	:  1,
+		/* Set if syscall, sysenter or INT n */
+		swevent	:  1,
+		/* Event is NMI type */
+		nmi	:  1,
+			: 13,
+		/* Event vector */
+		vector	:  8,
+			:  8,
+		/* Event type */
+		type	:  4,
+			:  4,
+		/* Event was incident to enclave execution */
+		enclave	:  1,
+		/* CPU was in long mode */
+		lm	:  1,
+		/*
+		 * Nested exception during FRED delivery, not set
+		 * for #DF.
+		 */
+		nested	:  1,
+			:  1,
+		/*
+		 * The length of the instruction causing the event.
+		 * Only set for INTO, INT1, INT3, INT n, SYSCALL
+		 * and SYSENTER.  0 otherwise.
+		 */
+		insnlen	:  4;
+};
+
 struct pt_regs {
-/*
- * C ABI says these regs are callee-preserved. They aren't saved on kernel entry
- * unless syscall needs a complete, fully filled "struct pt_regs".
- */
+	/*
+	 * C ABI says these regs are callee-preserved. They aren't saved on
+	 * kernel entry unless syscall needs a complete, fully filled
+	 * "struct pt_regs".
+	 */
 	unsigned long r15;
 	unsigned long r14;
 	unsigned long r13;
 	unsigned long r12;
 	unsigned long bp;
 	unsigned long bx;
-/* These regs are callee-clobbered. Always saved on kernel entry. */
+
+	/* These regs are callee-clobbered. Always saved on kernel entry. */
 	unsigned long r11;
 	unsigned long r10;
 	unsigned long r9;
@@ -77,18 +123,50 @@ struct pt_regs {
 	unsigned long dx;
 	unsigned long si;
 	unsigned long di;
-/*
- * On syscall entry, this is syscall#. On CPU exception, this is error code.
- * On hw interrupt, it's IRQ number:
- */
+
+	/*
+	 * orig_ax is used on entry for:
+	 * - the syscall number (syscall, sysenter, int80)
+	 * - error_code stored by the CPU on traps and exceptions
+	 * - the interrupt number for device interrupts
+	 *
+	 * A FRED stack frame starts here:
+	 *   1) It _always_ includes an error code;
+	 *
+	 *   2) The return frame for ERET[US] starts here, but
+	 *      the content of orig_ax is ignored.
+	 */
 	unsigned long orig_ax;
-/* Return frame for iretq */
+
+	/* The IRETQ return frame starts here */
 	unsigned long ip;
-	unsigned long cs;
+
+	union {
+		/* CS selector */
+		u16		cs;
+		/* The extended 64-bit data slot containing CS */
+		u64		csx;
+		/* The FRED CS extension */
+		struct fred_cs	fred_cs;
+	};
+
 	unsigned long flags;
 	unsigned long sp;
-	unsigned long ss;
-/* top of stack page */
+
+	union {
+		/* SS selector */
+		u16		ss;
+		/* The extended 64-bit data slot containing SS */
+		u64		ssx;
+		/* The FRED SS extension */
+		struct fred_ss	fred_ss;
+	};
+
+	/*
+	 * Top of stack on IDT systems, while FRED systems have extra fields
+	 * defined above for storing exception related information, e.g. CR2 or
+	 * DR6.
+	 */
 };
 
 #endif /* !__i386__ */