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, pedromfc@br.ibm.com, miltonm@us.ibm.com,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: [PATCH v3 7/9] powerpc/watchpoint: Guest support for 2nd DAWR hcall
Date: Wed, 8 Jul 2020 10:20:44 +0530 [thread overview]
Message-ID: <20200708045046.135702-8-ravi.bangoria@linux.ibm.com> (raw)
In-Reply-To: <20200708045046.135702-1-ravi.bangoria@linux.ibm.com>
2nd DAWR can be set/unset using H_SET_MODE hcall with resource value 5.
Enable powervm guest support with that. This has no effect on kvm guest
because kvm will return error if guest does hcall with resource value 5.
Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
---
arch/powerpc/include/asm/hvcall.h | 1 +
arch/powerpc/include/asm/machdep.h | 2 +-
arch/powerpc/include/asm/plpar_wrappers.h | 5 +++++
arch/powerpc/kernel/dawr.c | 2 +-
arch/powerpc/platforms/pseries/setup.c | 7 +++++--
5 files changed, 13 insertions(+), 4 deletions(-)
diff --git a/arch/powerpc/include/asm/hvcall.h b/arch/powerpc/include/asm/hvcall.h
index a7f6f1aeda6b..3f170b9496a1 100644
--- a/arch/powerpc/include/asm/hvcall.h
+++ b/arch/powerpc/include/asm/hvcall.h
@@ -357,6 +357,7 @@
#define H_SET_MODE_RESOURCE_SET_DAWR0 2
#define H_SET_MODE_RESOURCE_ADDR_TRANS_MODE 3
#define H_SET_MODE_RESOURCE_LE 4
+#define H_SET_MODE_RESOURCE_SET_DAWR1 5
/* Values for argument to H_SIGNAL_SYS_RESET */
#define H_SIGNAL_SYS_RESET_ALL -1
diff --git a/arch/powerpc/include/asm/machdep.h b/arch/powerpc/include/asm/machdep.h
index 7bcb64444a39..a90b892f0bfe 100644
--- a/arch/powerpc/include/asm/machdep.h
+++ b/arch/powerpc/include/asm/machdep.h
@@ -131,7 +131,7 @@ struct machdep_calls {
unsigned long dabrx);
/* Set DAWR for this platform, leave empty for default implementation */
- int (*set_dawr)(unsigned long dawr,
+ int (*set_dawr)(int nr, unsigned long dawr,
unsigned long dawrx);
#ifdef CONFIG_PPC32 /* XXX for now */
diff --git a/arch/powerpc/include/asm/plpar_wrappers.h b/arch/powerpc/include/asm/plpar_wrappers.h
index 93eb133d572c..d7a1acc83593 100644
--- a/arch/powerpc/include/asm/plpar_wrappers.h
+++ b/arch/powerpc/include/asm/plpar_wrappers.h
@@ -315,6 +315,11 @@ static inline long plpar_set_watchpoint0(unsigned long dawr0, unsigned long dawr
return plpar_set_mode(0, H_SET_MODE_RESOURCE_SET_DAWR0, dawr0, dawrx0);
}
+static inline long plpar_set_watchpoint1(unsigned long dawr1, unsigned long dawrx1)
+{
+ return plpar_set_mode(0, H_SET_MODE_RESOURCE_SET_DAWR1, dawr1, dawrx1);
+}
+
static inline long plpar_signal_sys_reset(long cpu)
{
return plpar_hcall_norets(H_SIGNAL_SYS_RESET, cpu);
diff --git a/arch/powerpc/kernel/dawr.c b/arch/powerpc/kernel/dawr.c
index 500f52fa4711..cdc2dccb987d 100644
--- a/arch/powerpc/kernel/dawr.c
+++ b/arch/powerpc/kernel/dawr.c
@@ -37,7 +37,7 @@ int set_dawr(int nr, struct arch_hw_breakpoint *brk)
dawrx |= (mrd & 0x3f) << (63 - 53);
if (ppc_md.set_dawr)
- return ppc_md.set_dawr(dawr, dawrx);
+ return ppc_md.set_dawr(nr, dawr, dawrx);
if (nr == 0) {
mtspr(SPRN_DAWR0, dawr);
diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c
index 2db8469e475f..d516ee8eb7fc 100644
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c
@@ -831,12 +831,15 @@ static int pseries_set_xdabr(unsigned long dabr, unsigned long dabrx)
return plpar_hcall_norets(H_SET_XDABR, dabr, dabrx);
}
-static int pseries_set_dawr(unsigned long dawr, unsigned long dawrx)
+static int pseries_set_dawr(int nr, unsigned long dawr, unsigned long dawrx)
{
/* PAPR says we can't set HYP */
dawrx &= ~DAWRX_HYP;
- return plpar_set_watchpoint0(dawr, dawrx);
+ if (nr == 0)
+ return plpar_set_watchpoint0(dawr, dawrx);
+ else
+ return plpar_set_watchpoint1(dawr, dawrx);
}
#define CMO_CHARACTERISTICS_TOKEN 44
--
2.26.2
next prev parent reply other threads:[~2020-07-08 4:51 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-08 4:50 [PATCH v3 0/9] powerpc/watchpoint: Enable 2nd DAWR on baremetal and powervm Ravi Bangoria
2020-07-08 4:50 ` [PATCH v3 1/9] powerpc/watchpoint: Fix 512 byte boundary limit Ravi Bangoria
2020-07-08 7:44 ` Jordan Niethe
2020-07-08 7:52 ` Christophe Leroy
2020-07-15 1:01 ` Jordan Niethe
2020-07-08 4:50 ` [PATCH v3 2/9] powerpc/watchpoint: Fix DAWR exception constraint Ravi Bangoria
2020-07-15 2:19 ` Jordan Niethe
2020-07-15 4:08 ` Ravi Bangoria
2020-07-08 4:50 ` [PATCH v3 3/9] powerpc/watchpoint: Enable watchpoint functionality on power10 guest Ravi Bangoria
2020-07-08 4:50 ` [PATCH v3 4/9] powerpc/dt_cpu_ftrs: Add feature for 2nd DAWR Ravi Bangoria
2020-07-08 4:50 ` [PATCH v3 5/9] powerpc/watchpoint: Set CPU_FTR_DAWR1 based on pa-features bit Ravi Bangoria
2020-07-08 4:50 ` [PATCH v3 6/9] powerpc/watchpoint: Rename current H_SET_MODE DAWR macro Ravi Bangoria
2020-07-08 4:50 ` Ravi Bangoria [this message]
2020-07-08 4:50 ` [PATCH v3 8/9] powerpc/watchpoint: Return available watchpoints dynamically Ravi Bangoria
2020-07-08 4:50 ` [PATCH v3 9/9] powerpc/watchpoint: Remove 512 byte boundary Ravi Bangoria
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