From d2ccde1c8e90d38cee87a1b0309ad2827f3fd30d Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 11 Dec 2023 02:45:28 +0000
Subject: [PATCH] add boot partition size
---
kernel/arch/powerpc/include/asm/hw_breakpoint.h | 79 +++++++++++++++++++++++++++------------
1 files changed, 54 insertions(+), 25 deletions(-)
diff --git a/kernel/arch/powerpc/include/asm/hw_breakpoint.h b/kernel/arch/powerpc/include/asm/hw_breakpoint.h
index ece4dc8..abebfbe 100644
--- a/kernel/arch/powerpc/include/asm/hw_breakpoint.h
+++ b/kernel/arch/powerpc/include/asm/hw_breakpoint.h
@@ -1,36 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* PowerPC BookIII S hardware breakpoint definitions
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
* Copyright 2010, IBM Corporation.
* Author: K.Prasad <prasad@linux.vnet.ibm.com>
- *
*/
#ifndef _PPC_BOOK3S_64_HW_BREAKPOINT_H
#define _PPC_BOOK3S_64_HW_BREAKPOINT_H
+
+#include <asm/cpu_has_feature.h>
+#include <asm/inst.h>
#ifdef __KERNEL__
struct arch_hw_breakpoint {
unsigned long address;
u16 type;
u16 len; /* length of the target data symbol */
+ u16 hw_len; /* length programmed in hw */
+ u8 flags;
};
-/* Note: Don't change the the first 6 bits below as they are in the same order
+/* Note: Don't change the first 6 bits below as they are in the same order
* as the dabr and dabrx.
*/
#define HW_BRK_TYPE_READ 0x01
@@ -47,6 +38,31 @@
#define HW_BRK_TYPE_PRIV_ALL (HW_BRK_TYPE_USER | HW_BRK_TYPE_KERNEL | \
HW_BRK_TYPE_HYP)
+#define HW_BRK_FLAG_DISABLED 0x1
+
+/* Minimum granularity */
+#ifdef CONFIG_PPC_8xx
+#define HW_BREAKPOINT_SIZE 0x4
+#else
+#define HW_BREAKPOINT_SIZE 0x8
+#endif
+#define HW_BREAKPOINT_SIZE_QUADWORD 0x10
+
+#define DABR_MAX_LEN 8
+#define DAWR_MAX_LEN 512
+
+static inline int nr_wp_slots(void)
+{
+ return cpu_has_feature(CPU_FTR_DAWR1) ? 2 : 1;
+}
+
+bool wp_check_constraints(struct pt_regs *regs, struct ppc_inst instr,
+ unsigned long ea, int type, int size,
+ struct arch_hw_breakpoint *info);
+
+void wp_get_instr_detail(struct pt_regs *regs, struct ppc_inst *instr,
+ int *type, int *size, unsigned long *ea);
+
#ifdef CONFIG_HAVE_HW_BREAKPOINT
#include <linux/kdebug.h>
#include <asm/reg.h>
@@ -58,8 +74,6 @@
struct perf_sample_data;
struct task_struct;
-#define HW_BREAKPOINT_ALIGN 0x7
-
extern int hw_breakpoint_slots(int type);
extern int arch_bp_generic_fields(int type, int *gen_bp_type);
extern int arch_check_bp_in_kernelspace(struct arch_hw_breakpoint *hw);
@@ -70,7 +84,6 @@
unsigned long val, void *data);
int arch_install_hw_breakpoint(struct perf_event *bp);
void arch_uninstall_hw_breakpoint(struct perf_event *bp);
-void arch_unregister_hw_breakpoint(struct perf_event *bp);
void hw_breakpoint_pmu_read(struct perf_event *bp);
extern void flush_ptrace_hw_breakpoint(struct task_struct *tsk);
@@ -79,13 +92,14 @@
struct perf_sample_data *data, struct pt_regs *regs);
static inline void hw_breakpoint_disable(void)
{
- struct arch_hw_breakpoint brk;
+ int i;
+ struct arch_hw_breakpoint null_brk = {0};
- brk.address = 0;
- brk.type = 0;
- brk.len = 0;
- if (ppc_breakpoint_available())
- __set_breakpoint(&brk);
+ if (!ppc_breakpoint_available())
+ return;
+
+ for (i = 0; i < nr_wp_slots(); i++)
+ __set_breakpoint(i, &null_brk);
}
extern void thread_change_pc(struct task_struct *tsk, struct pt_regs *regs);
int hw_breakpoint_handler(struct die_args *args);
@@ -94,6 +108,21 @@
static inline void hw_breakpoint_disable(void) { }
static inline void thread_change_pc(struct task_struct *tsk,
struct pt_regs *regs) { }
+
#endif /* CONFIG_HAVE_HW_BREAKPOINT */
+
+
+#ifdef CONFIG_PPC_DAWR
+extern bool dawr_force_enable;
+static inline bool dawr_enabled(void)
+{
+ return dawr_force_enable;
+}
+int set_dawr(int nr, struct arch_hw_breakpoint *brk);
+#else
+static inline bool dawr_enabled(void) { return false; }
+static inline int set_dawr(int nr, struct arch_hw_breakpoint *brk) { return -1; }
+#endif
+
#endif /* __KERNEL__ */
#endif /* _PPC_BOOK3S_64_HW_BREAKPOINT_H */
--
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