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From: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
To: mpe@ellerman.id.au, mikey@neuling.org
Cc: ravi.bangoria@linux.ibm.com, apopple@linux.ibm.com,
	paulus@samba.org, npiggin@gmail.com, christophe.leroy@c-s.fr,
	naveen.n.rao@linux.vnet.ibm.com, peterz@infradead.org,
	jolsa@kernel.org, oleg@redhat.com, fweisbec@gmail.com,
	mingo@kernel.org, linuxppc-dev@lists.ozlabs.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH 3/7] powerpc/watchpoint: Set CPU_FTR_DAWR1 based on pa-features bit
Date: Tue,  2 Jun 2020 09:31:02 +0530	[thread overview]
Message-ID: <20200602040106.127693-4-ravi.bangoria@linux.ibm.com> (raw)
In-Reply-To: <20200602040106.127693-1-ravi.bangoria@linux.ibm.com>

bit 0 of byte 64 in pa-features property indicates availability of 2nd
DAWR registers. i.e. If this bit is set, 2nd DAWR is present, otherwise
not. Host generally uses "cpu-features", which masks "pa-features". But
"cpu-features" are still not used for guests and thus this change is
mostly applicable for guests only.

Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
---
 arch/powerpc/kernel/prom.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index 1dcf0e214a22..6de59de579f7 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -175,6 +175,8 @@ static struct ibm_pa_feature {
 	 */
 	{ .pabyte = 22, .pabit = 0, .cpu_features = CPU_FTR_TM_COMP,
 	  .cpu_user_ftrs2 = PPC_FEATURE2_HTM_COMP | PPC_FEATURE2_HTM_NOSC_COMP },
+
+	{ .pabyte = 64, .pabit = 0, .cpu_features = CPU_FTR_DAWR1 },
 };
 
 static void __init scan_features(unsigned long node, const unsigned char *ftrs,
-- 
2.26.2


WARNING: multiple messages have this Message-ID (diff)
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,
	oleg@redhat.com, npiggin@gmail.com, linux-kernel@vger.kernel.org,
	paulus@samba.org, jolsa@kernel.org,
	naveen.n.rao@linux.vnet.ibm.com, linuxppc-dev@lists.ozlabs.org,
	mingo@kernel.org
Subject: [PATCH 3/7] powerpc/watchpoint: Set CPU_FTR_DAWR1 based on pa-features bit
Date: Tue,  2 Jun 2020 09:31:02 +0530	[thread overview]
Message-ID: <20200602040106.127693-4-ravi.bangoria@linux.ibm.com> (raw)
In-Reply-To: <20200602040106.127693-1-ravi.bangoria@linux.ibm.com>

bit 0 of byte 64 in pa-features property indicates availability of 2nd
DAWR registers. i.e. If this bit is set, 2nd DAWR is present, otherwise
not. Host generally uses "cpu-features", which masks "pa-features". But
"cpu-features" are still not used for guests and thus this change is
mostly applicable for guests only.

Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
---
 arch/powerpc/kernel/prom.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index 1dcf0e214a22..6de59de579f7 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -175,6 +175,8 @@ static struct ibm_pa_feature {
 	 */
 	{ .pabyte = 22, .pabit = 0, .cpu_features = CPU_FTR_TM_COMP,
 	  .cpu_user_ftrs2 = PPC_FEATURE2_HTM_COMP | PPC_FEATURE2_HTM_NOSC_COMP },
+
+	{ .pabyte = 64, .pabit = 0, .cpu_features = CPU_FTR_DAWR1 },
 };
 
 static void __init scan_features(unsigned long node, const unsigned char *ftrs,
-- 
2.26.2


  parent reply	other threads:[~2020-06-02  4:01 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-02  4:00 [PATCH 0/7] powerpc/watchpoint: Enable 2nd DAWR on baremetal and powervm Ravi Bangoria
2020-06-02  4:00 ` Ravi Bangoria
2020-06-02  4:01 ` [PATCH 1/7] powerpc/watchpoint: Enable watchpoint functionality on power10 guest Ravi Bangoria
2020-06-02  4:01   ` Ravi Bangoria
2020-06-02  4:01 ` [PATCH 2/7] powerpc/dt_cpu_ftrs: Add feature for 2nd DAWR Ravi Bangoria
2020-06-02  4:01   ` Ravi Bangoria
2020-06-02  4:01 ` Ravi Bangoria [this message]
2020-06-02  4:01   ` [PATCH 3/7] powerpc/watchpoint: Set CPU_FTR_DAWR1 based on pa-features bit Ravi Bangoria
2020-06-02  4:01 ` [PATCH 4/7] powerpc/watchpoint: Rename current H_SET_MODE DAWR macro Ravi Bangoria
2020-06-02  4:01   ` Ravi Bangoria
2020-06-02  4:01 ` [PATCH 5/7] powerpc/watchpoint: Guest support for 2nd DAWR hcall Ravi Bangoria
2020-06-02  4:01   ` Ravi Bangoria
2020-06-02  4:01 ` [PATCH 6/7] powerpc/watchpoint: Return available watchpoints dynamically Ravi Bangoria
2020-06-02  4:01   ` Ravi Bangoria
2020-06-02  4:01 ` [PATCH 7/7] powerpc/watchpoint: Remove 512 byte boundary Ravi Bangoria
2020-06-02  4:01   ` Ravi Bangoria

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