From: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
To: mpe@ellerman.id.au, mikey@neuling.org
Cc: christophe.leroy@c-s.fr, ravi.bangoria@linux.ibm.com,
apopple@linux.ibm.com, peterz@infradead.org, fweisbec@gmail.com,
miltonm@us.ibm.com, oleg@redhat.com, npiggin@gmail.com,
linux-kernel@vger.kernel.org, paulus@samba.org, jolsa@kernel.org,
jniethe5@gmail.com, pedromfc@br.ibm.com,
naveen.n.rao@linux.vnet.ibm.com, linuxppc-dev@lists.ozlabs.org,
mingo@kernel.org
Subject: [PATCH v4 09/10] powerpc/watchpoint: Return available watchpoints dynamically
Date: Fri, 17 Jul 2020 09:39:57 +0530 [thread overview]
Message-ID: <20200717040958.70561-10-ravi.bangoria@linux.ibm.com> (raw)
In-Reply-To: <20200717040958.70561-1-ravi.bangoria@linux.ibm.com>
So far Book3S Powerpc supported only one watchpoint. Power10 is
introducing 2nd DAWR. Enable 2nd DAWR support for Power10.
Availability of 2nd DAWR will depend on CPU_FTR_DAWR1.
Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
---
arch/powerpc/include/asm/cputable.h | 4 +++-
arch/powerpc/include/asm/hw_breakpoint.h | 5 +++--
2 files changed, 6 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/include/asm/cputable.h b/arch/powerpc/include/asm/cputable.h
index 3445c86e1f6f..36a0851a7a9b 100644
--- a/arch/powerpc/include/asm/cputable.h
+++ b/arch/powerpc/include/asm/cputable.h
@@ -633,7 +633,9 @@ enum {
* Maximum number of hw breakpoint supported on powerpc. Number of
* breakpoints supported by actual hw might be less than this.
*/
-#define HBP_NUM_MAX 1
+#define HBP_NUM_MAX 2
+#define HBP_NUM_ONE 1
+#define HBP_NUM_TWO 2
#endif /* !__ASSEMBLY__ */
diff --git a/arch/powerpc/include/asm/hw_breakpoint.h b/arch/powerpc/include/asm/hw_breakpoint.h
index cb424799da0d..d4eab1694bcd 100644
--- a/arch/powerpc/include/asm/hw_breakpoint.h
+++ b/arch/powerpc/include/asm/hw_breakpoint.h
@@ -5,10 +5,11 @@
* 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>
+
#ifdef __KERNEL__
struct arch_hw_breakpoint {
unsigned long address;
@@ -46,7 +47,7 @@ struct arch_hw_breakpoint {
static inline int nr_wp_slots(void)
{
- return HBP_NUM_MAX;
+ return cpu_has_feature(CPU_FTR_DAWR1) ? HBP_NUM_TWO : HBP_NUM_ONE;
}
#ifdef CONFIG_HAVE_HW_BREAKPOINT
--
2.26.2
next prev parent reply other threads:[~2020-07-17 4:29 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-17 4:09 [PATCH v4 00/10] powerpc/watchpoint: Enable 2nd DAWR on baremetal and powervm Ravi Bangoria
2020-07-17 4:09 ` [PATCH v4 01/10] powerpc/watchpoint: Fix 512 byte boundary limit Ravi Bangoria
2020-07-17 4:09 ` [PATCH v4 02/10] powerpc/watchpoint: Fix DAWR exception constraint Ravi Bangoria
2020-07-17 4:09 ` [PATCH v4 03/10] powerpc/watchpoint: Fix DAWR exception for CACHEOP Ravi Bangoria
2020-07-17 4:09 ` [PATCH v4 04/10] powerpc/watchpoint: Enable watchpoint functionality on power10 guest Ravi Bangoria
2020-07-17 4:23 ` Jordan Niethe
2020-07-17 4:09 ` [PATCH v4 05/10] powerpc/dt_cpu_ftrs: Add feature for 2nd DAWR Ravi Bangoria
2020-07-17 5:44 ` Jordan Niethe
2020-07-21 7:51 ` Ravi Bangoria
2020-07-21 11:29 ` Michael Ellerman
2020-07-21 13:42 ` Ravi Bangoria
2020-07-21 14:07 ` Michael Ellerman
2020-07-21 14:16 ` Ravi Bangoria
2020-07-17 4:09 ` [PATCH v4 06/10] powerpc/watchpoint: Set CPU_FTR_DAWR1 based on pa-features bit Ravi Bangoria
2020-07-20 1:39 ` Jordan Niethe
2020-07-17 4:09 ` [PATCH v4 07/10] powerpc/watchpoint: Rename current H_SET_MODE DAWR macro Ravi Bangoria
2020-07-20 1:50 ` Jordan Niethe
2020-07-17 4:09 ` [PATCH v4 08/10] powerpc/watchpoint: Guest support for 2nd DAWR hcall Ravi Bangoria
2020-07-17 4:09 ` Ravi Bangoria [this message]
2020-07-20 3:42 ` [PATCH v4 09/10] powerpc/watchpoint: Return available watchpoints dynamically Jordan Niethe
2020-07-21 3:57 ` Ravi Bangoria
2020-07-21 4:41 ` Jordan Niethe
2020-07-21 8:15 ` Ravi Bangoria
2020-07-21 11:36 ` Michael Ellerman
2020-07-21 13:33 ` Ravi Bangoria
2020-07-17 4:09 ` [PATCH v4 10/10] powerpc/watchpoint: Remove 512 byte boundary Ravi Bangoria
2020-07-20 6:54 ` Jordan Niethe
2020-07-21 3:24 ` Ravi Bangoria
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