linux-kernel - [PATCH 3/6] Probe watch registers and report configuration.

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <48167AE4.8050208@avtrex.com>
Date:	Mon, 28 Apr 2008 18:33:24 -0700
From:	David Daney <ddaney@...rex.com>
To:	linux-mips@...ux-mips.org
Cc:	Linux kernel <linux-kernel@...r.kernel.org>
Subject: [PATCH 3/6] Probe watch registers and report configuration.

Probe watch registers and report configuration.

Probe for watch register characteristics, and report them in /proc/cpuinfo.

Signed-off-by: David Daney <ddaney@...rex.com>
---
 arch/mips/kernel/cpu-probe.c |    4 ++++
 arch/mips/kernel/proc.c      |   10 ++++++++++
 2 files changed, 14 insertions(+), 0 deletions(-)

diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index 89c3304..1563049 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -21,6 +21,7 @@
 #include <asm/fpu.h>
 #include <asm/mipsregs.h>
 #include <asm/system.h>
+#include <asm/watch.h>
 
 /*
  * Not all of the MIPS CPUs have the "wait" instruction available. Moreover,
@@ -678,6 +679,9 @@ static void __cpuinit decode_configs(struct cpuinfo_mips *c)
 static inline void cpu_probe_mips(struct cpuinfo_mips *c)
 {
 	decode_configs(c);
+#if defined(CONFIG_HARDWARE_WATCHPOINTS)
+	mips_probe_watch_registers(c);
+#endif
 	switch (c->processor_id & 0xff00) {
 	case PRID_IMP_4KC:
 		c->cputype = CPU_4KC;
diff --git a/arch/mips/kernel/proc.c b/arch/mips/kernel/proc.c
index 36f0653..e2f716c 100644
--- a/arch/mips/kernel/proc.c
+++ b/arch/mips/kernel/proc.c
@@ -50,8 +50,18 @@ static int show_cpuinfo(struct seq_file *m, void *v)
 	seq_printf(m, "tlb_entries\t\t: %d\n", cpu_data[n].tlbsize);
 	seq_printf(m, "extra interrupt vector\t: %s\n",
 	              cpu_has_divec ? "yes" : "no");
+#ifdef CONFIG_HARDWARE_WATCHPOINTS
+	seq_printf(m, "hardware watchpoint\t: %s",
+		   cpu_has_watch ? "yes" : "no\n");
+	if (cpu_has_watch)
+		seq_printf(m, ", count: %d, address mask: 0x%04x, irw mask 0x%02x\n",
+			   cpu_data[n].watch_reg_count,
+			   cpu_data[n].watch_reg_mask,
+			   cpu_data[n].watch_reg_irw);
+#else
 	seq_printf(m, "hardware watchpoint\t: %s\n",
 	              cpu_has_watch ? "yes" : "no");
+#endif
 	seq_printf(m, "ASEs implemented\t:%s%s%s%s%s%s\n",
 		      cpu_has_mips16 ? " mips16" : "",
 		      cpu_has_mdmx ? " mdmx" : "",
-- 
1.5.5

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/