From: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
To: benh@kernel.crashing.org, mpe@ellerman.id.au
Cc: anton@samba.org, paulus@samba.org, npiggin@gmail.com,
linuxppc-dev@lists.ozlabs.org,
Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Subject: [RFC PATCH v2 09/11] powerpc: Add support to mask perf interrupts
Date: Mon, 1 Aug 2016 00:36:27 +0530 [thread overview]
Message-ID: <1469991989-28409-10-git-send-email-maddy@linux.vnet.ibm.com> (raw)
In-Reply-To: <1469991989-28409-1-git-send-email-maddy@linux.vnet.ibm.com>
To support masking of the PMI interrupts, couple of new interrupt handler
macros are added MASKABLE_EXCEPTION_PSERIES_OOL and
MASKABLE_RELON_EXCEPTION_PSERIES_OOL. These are needed to include the
SOFTEN_TEST and implement the support at both host and guest kernel.
Couple of new irq #defs "PACA_IRQ_PMI" and "SOFTEN_VALUE_0xf0*" added to
use in the exception code to check for PMI interrupts.
New flag value, "IRQ_DISABLE_LEVEL_PMU == 2", added to soft_enabled.
With new flag value for "soft_enabled", states looks like:
soft_enabled MSR[EE]
2 0 Disbaled PMIs also
1 0 Disabled (PMI and HMI not masked)
0 1 Enabled
PMI will have the maskable level as 2 and will be a NMI in lower level.
Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
---
arch/powerpc/include/asm/exception-64s.h | 14 +++++++++++
arch/powerpc/include/asm/hw_irq.h | 4 +++
arch/powerpc/kernel/exceptions-64s.S | 43 ++++++++++++++++++++++----------
3 files changed, 48 insertions(+), 13 deletions(-)
diff --git a/arch/powerpc/include/asm/exception-64s.h b/arch/powerpc/include/asm/exception-64s.h
index 01ab37eff3f8..90b150478398 100644
--- a/arch/powerpc/include/asm/exception-64s.h
+++ b/arch/powerpc/include/asm/exception-64s.h
@@ -425,6 +425,8 @@ label##_relon_hv: \
#define SOFTEN_VALUE_0xe82 PACA_IRQ_DBELL
#define SOFTEN_VALUE_0xe60 PACA_IRQ_HMI
#define SOFTEN_VALUE_0xe62 PACA_IRQ_HMI
+#define SOFTEN_VALUE_0xf00 PACA_IRQ_PMI
+#define SOFTEN_VALUE_0xf01 PACA_IRQ_PMI
#define __SOFTEN_TEST(h, vec, mask_lvl) \
lbz r10,PACASOFTIRQEN(r13); \
@@ -462,6 +464,12 @@ label##_pSeries: \
_MASKABLE_EXCEPTION_PSERIES(vec, label, \
EXC_STD, SOFTEN_TEST_PR, mask_lvl)
+#define MASKABLE_EXCEPTION_PSERIES_OOL(vec, label, mask_lvl) \
+ .globl label##_pSeries; \
+label##_pSeries: \
+ __EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_TEST_PR, vec, mask_lvl);\
+ EXCEPTION_PROLOG_PSERIES_1(label##_common, EXC_STD);
+
#define MASKABLE_EXCEPTION_HV(loc, vec, label, mask_lvl) \
. = loc; \
.globl label##_hv; \
@@ -490,6 +498,12 @@ label##_relon_pSeries: \
_MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, \
EXC_STD, SOFTEN_NOTEST_PR, mask_lvl)
+#define MASKABLE_RELON_EXCEPTION_PSERIES_OOL(vec, label, mask_lvl) \
+ .globl label##_relon_pSeries; \
+label##_relon_pSeries: \
+ __EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_NOTEST_PR, vec, mask_lvl);\
+ EXCEPTION_PROLOG_PSERIES_1(label##_common, EXC_STD);
+
#define MASKABLE_RELON_EXCEPTION_HV(loc, vec, label, mask_lvl) \
. = loc; \
.globl label##_relon_hv; \
diff --git a/arch/powerpc/include/asm/hw_irq.h b/arch/powerpc/include/asm/hw_irq.h
index 0206a6c493c7..a7b86edc94bf 100644
--- a/arch/powerpc/include/asm/hw_irq.h
+++ b/arch/powerpc/include/asm/hw_irq.h
@@ -26,12 +26,16 @@
#define PACA_IRQ_DEC 0x08 /* Or FIT */
#define PACA_IRQ_EE_EDGE 0x10 /* BookE only */
#define PACA_IRQ_HMI 0x20
+#define PACA_IRQ_PMI 0x40
/*
* flags for paca->soft_enabled
*/
#define IRQ_DISABLE_LEVEL_NONE 0
#define IRQ_DISABLE_LEVEL_LINUX 1
+#define IRQ_DISABLE_LEVEL_PMU 2
+
+#define MASK_IRQ_LEVEL IRQ_DISABLE_LEVEL_LINUX | IRQ_DISABLE_LEVEL_PMU
#endif /* CONFIG_PPC64 */
diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
index 2c87e82ecbe4..56dc71b82824 100644
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -256,11 +256,11 @@ hardware_interrupt_pSeries:
hardware_interrupt_hv:
BEGIN_FTR_SECTION
_MASKABLE_EXCEPTION_PSERIES(0x502, hardware_interrupt,
- EXC_HV, SOFTEN_TEST_HV, IRQ_DISABLE_LEVEL_LINUX)
+ EXC_HV, SOFTEN_TEST_HV, MASK_IRQ_LEVEL)
KVM_HANDLER(PACA_EXGEN, EXC_HV, 0x502)
FTR_SECTION_ELSE
_MASKABLE_EXCEPTION_PSERIES(0x500, hardware_interrupt,
- EXC_STD, SOFTEN_TEST_PR, IRQ_DISABLE_LEVEL_LINUX)
+ EXC_STD, SOFTEN_TEST_PR, MASK_IRQ_LEVEL)
KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x500)
ALT_FTR_SECTION_END_IFSET(CPU_FTR_HVMODE | CPU_FTR_ARCH_206)
@@ -277,11 +277,11 @@ hardware_interrupt_hv:
.globl decrementer_pSeries
decrementer_pSeries:
_MASKABLE_EXCEPTION_PSERIES(0x900, decrementer, EXC_STD,
- SOFTEN_TEST_PR, IRQ_DISABLE_LEVEL_LINUX)
+ SOFTEN_TEST_PR, MASK_IRQ_LEVEL)
STD_EXCEPTION_HV(0x980, 0x982, hdecrementer)
- MASKABLE_EXCEPTION_PSERIES(0xa00, 0xa00, doorbell_super, IRQ_DISABLE_LEVEL_LINUX)
+ MASKABLE_EXCEPTION_PSERIES(0xa00, 0xa00, doorbell_super, MASK_IRQ_LEVEL)
KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xa00)
STD_EXCEPTION_PSERIES(0xb00, trap_0b)
@@ -361,7 +361,11 @@ hv_doorbell_trampoline:
performance_monitor_pseries_trampoline:
SET_SCRATCH0(r13)
EXCEPTION_PROLOG_0(PACA_EXGEN)
+BEGIN_FTR_SECTION
+ b performance_monitor_hv
+FTR_SECTION_ELSE
b performance_monitor_pSeries
+ALT_FTR_SECTION_END_IFSET(CPU_FTR_HVMODE)
. = 0xf20
altivec_unavailable_pseries_trampoline:
@@ -596,15 +600,20 @@ END_FTR_SECTION_IFSET(CPU_FTR_CFAR)
KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe22)
STD_EXCEPTION_HV_OOL(0xe42, emulation_assist)
KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe42)
- MASKABLE_EXCEPTION_HV_OOL(0xe62, hmi_exception, IRQ_DISABLE_LEVEL_LINUX)
+ MASKABLE_EXCEPTION_HV_OOL(0xe62, hmi_exception, MASK_IRQ_LEVEL)
KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe62)
- MASKABLE_EXCEPTION_HV_OOL(0xe82, h_doorbell, IRQ_DISABLE_LEVEL_LINUX)
+ MASKABLE_EXCEPTION_HV_OOL(0xe82, h_doorbell, MASK_IRQ_LEVEL)
KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe82)
/* moved from 0xf00 */
- STD_EXCEPTION_PSERIES_OOL(0xf00, performance_monitor)
+BEGIN_FTR_SECTION
+ MASKABLE_EXCEPTION_HV_OOL(0xf01, performance_monitor, IRQ_DISABLE_LEVEL_PMU)
+ KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xf01)
+FTR_SECTION_ELSE
+ MASKABLE_EXCEPTION_PSERIES_OOL(0xf00, performance_monitor, IRQ_DISABLE_LEVEL_PMU)
KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xf00)
+ALT_FTR_SECTION_END_IFSET(CPU_FTR_HVMODE)
STD_EXCEPTION_PSERIES_OOL(0xf20, altivec_unavailable)
KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xf20)
STD_EXCEPTION_PSERIES_OOL(0xf40, vsx_unavailable)
@@ -836,17 +845,17 @@ hardware_interrupt_relon_pSeries:
hardware_interrupt_relon_hv:
BEGIN_FTR_SECTION
_MASKABLE_RELON_EXCEPTION_PSERIES(0x502, hardware_interrupt,
- EXC_HV, SOFTEN_TEST_HV, IRQ_DISABLE_LEVEL_LINUX)
+ EXC_HV, SOFTEN_TEST_HV, MASK_IRQ_LEVEL)
FTR_SECTION_ELSE
_MASKABLE_RELON_EXCEPTION_PSERIES(0x500, hardware_interrupt,
- EXC_STD, SOFTEN_TEST_PR, IRQ_DISABLE_LEVEL_LINUX)
+ EXC_STD, SOFTEN_TEST_PR, MASK_IRQ_LEVEL)
ALT_FTR_SECTION_END_IFSET(CPU_FTR_HVMODE)
STD_RELON_EXCEPTION_PSERIES(0x4600, 0x600, alignment)
STD_RELON_EXCEPTION_PSERIES(0x4700, 0x700, program_check)
STD_RELON_EXCEPTION_PSERIES(0x4800, 0x800, fp_unavailable)
- MASKABLE_RELON_EXCEPTION_PSERIES(0x4900, 0x900, decrementer, IRQ_DISABLE_LEVEL_LINUX)
+ MASKABLE_RELON_EXCEPTION_PSERIES(0x4900, 0x900, decrementer, MASK_IRQ_LEVEL)
STD_RELON_EXCEPTION_HV(0x4980, 0x982, hdecrementer)
- MASKABLE_RELON_EXCEPTION_PSERIES(0x4a00, 0xa00, doorbell_super, IRQ_DISABLE_LEVEL_LINUX)
+ MASKABLE_RELON_EXCEPTION_PSERIES(0x4a00, 0xa00, doorbell_super, MASK_IRQ_LEVEL)
STD_RELON_EXCEPTION_PSERIES(0x4b00, 0xb00, trap_0b)
. = 0x4c00
@@ -884,7 +893,11 @@ h_doorbell_relon_trampoline:
performance_monitor_relon_pseries_trampoline:
SET_SCRATCH0(r13)
EXCEPTION_PROLOG_0(PACA_EXGEN)
+BEGIN_FTR_SECTION
+ b performance_monitor_relon_hv
+FTR_SECTION_ELSE
b performance_monitor_relon_pSeries
+ALT_FTR_SECTION_END_IFSET(CPU_FTR_HVMODE)
. = 0x4f20
altivec_unavailable_relon_pseries_trampoline:
@@ -1139,9 +1152,13 @@ END_FTR_SECTION_IFSET(CPU_FTR_VSX)
/* Equivalents to the above handlers for relocation-on interrupt vectors */
STD_RELON_EXCEPTION_HV_OOL(0xe40, emulation_assist)
- MASKABLE_RELON_EXCEPTION_HV_OOL(0xe80, h_doorbell, IRQ_DISABLE_LEVEL_LINUX)
+ MASKABLE_RELON_EXCEPTION_HV_OOL(0xe80, h_doorbell, MASK_IRQ_LEVEL)
- STD_RELON_EXCEPTION_PSERIES_OOL(0xf00, performance_monitor)
+BEGIN_FTR_SECTION
+ MASKABLE_RELON_EXCEPTION_HV_OOL(0xf01, performance_monitor, IRQ_DISABLE_LEVEL_PMU)
+FTR_SECTION_ELSE
+ MASKABLE_RELON_EXCEPTION_PSERIES_OOL(0xf00, performance_monitor, IRQ_DISABLE_LEVEL_PMU)
+ALT_FTR_SECTION_END_IFSET(CPU_FTR_HVMODE)
STD_RELON_EXCEPTION_PSERIES_OOL(0xf20, altivec_unavailable)
STD_RELON_EXCEPTION_PSERIES_OOL(0xf40, vsx_unavailable)
STD_RELON_EXCEPTION_PSERIES_OOL(0xf60, facility_unavailable)
--
2.7.4
next prev parent reply other threads:[~2016-07-31 19:07 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-31 19:06 [RFC PATCH v2 00/11] powerpc: "paca->soft_enabled" based local atomic operation implementation Madhavan Srinivasan
2016-07-31 19:06 ` [RFC PATCH v2 01/11] Add #defs for paca->soft_enabled flags Madhavan Srinivasan
2016-07-31 19:06 ` [RFC PATCH v2 02/11] Cleanup to use IRQ_DISABLE_LEVEL_* macros for paca->soft_enabled update Madhavan Srinivasan
2016-07-31 19:06 ` [RFC PATCH v2 03/11] powerpc: move set_soft_enabled() Madhavan Srinivasan
2016-07-31 19:06 ` [RFC PATCH v2 04/11] powerpc: Use set_soft_enabled api to update paca->soft_enabled Madhavan Srinivasan
2016-07-31 19:06 ` [RFC PATCH v2 05/11] powerpc: reverse the soft_enable logic Madhavan Srinivasan
2016-07-31 19:06 ` [RFC PATCH v2 06/11] powerpc: Avoid using EXCEPTION_PROLOG_1 macro in MASKABLE_* Madhavan Srinivasan
2016-07-31 19:06 ` [RFC PATCH v2 07/11] powerpc: Add new _EXCEPTION_PROLOG_1 macro Madhavan Srinivasan
2016-07-31 19:06 ` [RFC PATCH v2 08/11] powerpc: Add "mask_lvl" paramater to MASKABLE_* macros Madhavan Srinivasan
2016-08-01 5:21 ` Nicholas Piggin
2016-08-01 5:49 ` Madhavan Srinivasan
2016-07-31 19:06 ` Madhavan Srinivasan [this message]
2016-08-01 5:29 ` [RFC PATCH v2 09/11] powerpc: Add support to mask perf interrupts Nicholas Piggin
2016-08-01 6:09 ` Madhavan Srinivasan
2016-08-01 6:48 ` Nicholas Piggin
2016-07-31 19:06 ` [RFC PATCH v2 10/11] powerpc: Support to replay PMIs Madhavan Srinivasan
2016-08-01 8:07 ` Nicholas Piggin
2016-08-01 8:51 ` Benjamin Herrenschmidt
2016-08-01 10:22 ` Madhavan Srinivasan
2016-08-01 10:43 ` Nicholas Piggin
2016-08-01 8:52 ` Benjamin Herrenschmidt
2016-07-31 19:06 ` [RFC PATCH v2 11/11] powerpc: rewrite local_t using soft_irq Madhavan Srinivasan
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