From: Michael Neuling <mikey@neuling.org>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Michael Neuling <mikey@neuling.org>,
linuxppc-dev@lists.ozlabs.org, Matt Evans <matt@ozlabs.org>
Subject: [PATCH 10/17] powerpc: Add transactional memory unavaliable execption handler
Date: Fri, 18 Jan 2013 16:48:30 +1100 [thread overview]
Message-ID: <1358488117-17363-11-git-send-email-mikey@neuling.org> (raw)
In-Reply-To: <1358488117-17363-1-git-send-email-mikey@neuling.org>
These should never happen since we always turn on MSR TM when in userspace. We
don't do lazy TM.
Hence if we hit this, we barf and kill the task as something's gone horribly
wrong.
Signed-off-by: Matt Evans <matt@ozlabs.org>
Signed-off-by: Michael Neuling <mikey@neuling.org>
---
arch/powerpc/kernel/exceptions-64s.S | 19 +++++++++++++++++++
arch/powerpc/kernel/traps.c | 21 +++++++++++++++++++++
2 files changed, 40 insertions(+)
diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
index 7a1c87c..d0cc657 100644
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -313,6 +313,9 @@ vsx_unavailable_pSeries_1:
. = 0xf40
b vsx_unavailable_pSeries
+ . = 0xf60
+ b tm_unavailable_pSeries
+
#ifdef CONFIG_CBE_RAS
STD_EXCEPTION_HV(0x1200, 0x1202, cbe_system_error)
KVM_HANDLER_SKIP(PACA_EXGEN, EXC_HV, 0x1202)
@@ -528,6 +531,8 @@ ALT_FTR_SECTION_END_IFCLR(CPU_FTR_ARCH_206)
KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xf20)
STD_EXCEPTION_PSERIES(., 0xf40, vsx_unavailable)
KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xf40)
+ STD_EXCEPTION_PSERIES(., 0xf60, tm_unavailable)
+ KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xf60)
/*
* An interrupt came in while soft-disabled. We set paca->irq_happened, then:
@@ -817,6 +822,10 @@ vsx_unavailable_relon_pSeries_1:
. = 0x4f40
b vsx_unavailable_relon_pSeries
+tm_unavailable_relon_pSeries_1:
+ . = 0x4f60
+ b tm_unavailable_relon_pSeries
+
#ifdef CONFIG_CBE_RAS
STD_RELON_EXCEPTION_HV(0x5200, 0x1202, cbe_system_error)
#endif /* CONFIG_CBE_RAS */
@@ -1177,6 +1186,15 @@ END_FTR_SECTION_IFSET(CPU_FTR_VSX)
b .ret_from_except
.align 7
+ .globl tm_unavailable_common
+tm_unavailable_common:
+ EXCEPTION_PROLOG_COMMON(0xf60, PACA_EXGEN)
+ bl .save_nvgprs
+ addi r3,r1,STACK_FRAME_OVERHEAD
+ bl .tm_unavailable_exception
+ b .ret_from_except
+
+ .align 7
.globl __end_handlers
__end_handlers:
@@ -1195,6 +1213,7 @@ __end_handlers:
STD_RELON_EXCEPTION_PSERIES(., 0xf00, performance_monitor)
STD_RELON_EXCEPTION_PSERIES(., 0xf20, altivec_unavailable)
STD_RELON_EXCEPTION_PSERIES(., 0xf40, vsx_unavailable)
+ STD_RELON_EXCEPTION_PSERIES(., 0xf60, tm_unavailable)
#if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV)
/*
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 2a62f54..dda0517 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -1171,6 +1171,27 @@ void vsx_unavailable_exception(struct pt_regs *regs)
die("Unrecoverable VSX Unavailable Exception", regs, SIGABRT);
}
+void tm_unavailable_exception(struct pt_regs *regs)
+{
+ /* We restore the interrupt state now */
+ if (!arch_irq_disabled_regs(regs))
+ local_irq_enable();
+
+ /* Currently we never expect a TMU exception. Catch
+ * this and kill the process!
+ */
+ printk(KERN_EMERG "Unexpected TM unavailable exception at %lx "
+ "(msr %lx)\n",
+ regs->nip, regs->msr);
+
+ if (user_mode(regs)) {
+ _exception(SIGILL, regs, ILL_ILLOPC, regs->nip);
+ return;
+ }
+
+ die("Unexpected TM unavailable exception", regs, SIGABRT);
+}
+
void performance_monitor_exception(struct pt_regs *regs)
{
__get_cpu_var(irq_stat).pmu_irqs++;
--
1.7.10.4
next prev parent reply other threads:[~2013-01-18 5:48 UTC|newest]
Thread overview: 77+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-27 2:47 [PATCH 00/16] powerpc: Hardware transactional memory support for POWER8 Michael Neuling
2012-11-27 2:47 ` [PATCH 01/16] powerpc: Add new CPU feature bit for transactional memory Michael Neuling
2012-11-27 2:47 ` [PATCH 02/16] powerpc: Add new instructions " Michael Neuling
2012-11-27 2:47 ` [PATCH 03/16] powerpc: Add additional state needed for transactional memory to thread struct Michael Neuling
2012-11-27 2:47 ` [PATCH 04/16] powerpc: New macros for transactional memory support Michael Neuling
2012-11-27 2:47 ` [PATCH 05/16] powerpc: Register defines for various transactional memory registers Michael Neuling
2012-11-27 2:47 ` [PATCH 06/16] powerpc: Add transactional memory paca scratch register to show_regs Michael Neuling
2012-11-27 2:47 ` [PATCH 07/16] powerpc: Add helper functions for transactional memory context switching Michael Neuling
2012-11-27 2:48 ` [PATCH 08/16] powerpc: Add FP/VSX and VMX register load functions for transactional memory Michael Neuling
2012-11-27 2:48 ` [PATCH 09/16] powerpc: Add reclaim and recheckpoint functions for context switching transactional memory processes Michael Neuling
2012-11-27 2:48 ` [PATCH 10/16] powerpc: Add transactional memory unavaliable execption handler Michael Neuling
2012-11-27 2:48 ` [PATCH 11/16] powerpc: Assembler routines for FP/VSX/VMX unavailable during a transaction Michael Neuling
2012-11-27 2:48 ` [PATCH 12/16] powerpc: Hook in new transactional memory code Michael Neuling
2012-11-27 2:48 ` [PATCH 13/16] powerpc: Add transactional memory to POWER8 cpu features Michael Neuling
2012-11-27 2:48 ` [PATCH 14/16] powerpc: Add config option for transactional memory Michael Neuling
2012-11-27 2:48 ` [PATCH 15/16] powerpc: Add transactional memory to pseries and ppc64 defconfigs Michael Neuling
2012-11-27 2:48 ` [PATCH 16/16] powerpc: Documentation for transactional memory on powerpc Michael Neuling
2013-01-18 5:48 ` [PATCH 00/17] powerpc: Hardware transactional memory support for POWER8 Michael Neuling
2013-01-18 5:48 ` [PATCH 01/17] powerpc: Add new CPU feature bit for transactional memory Michael Neuling
2013-01-18 5:48 ` [PATCH 02/17] powerpc: Add new instructions " Michael Neuling
2013-01-18 5:48 ` [PATCH 03/17] powerpc: Add additional state needed for transactional memory to thread struct Michael Neuling
2013-01-18 5:48 ` [PATCH 04/17] powerpc: New macros for transactional memory support Michael Neuling
2013-01-18 5:48 ` [PATCH 05/17] powerpc: Register defines for various transactional memory registers Michael Neuling
2013-01-18 5:48 ` [PATCH 06/17] powerpc: Add transactional memory paca scratch register to show_regs Michael Neuling
2013-01-18 5:48 ` [PATCH 07/17] powerpc: Add helper functions for transactional memory context switching Michael Neuling
2013-01-18 5:48 ` [PATCH 08/17] powerpc: Add FP/VSX and VMX register load functions for transactional memory Michael Neuling
2013-01-18 5:48 ` [PATCH 09/17] powerpc: Add reclaim and recheckpoint functions for context switching transactional memory processes Michael Neuling
2013-01-18 5:48 ` Michael Neuling [this message]
2013-01-18 5:48 ` [PATCH 11/17] powerpc: Assembler routines for FP/VSX/VMX unavailable during a transaction Michael Neuling
2013-01-18 5:48 ` [PATCH 12/17] powerpc: Hook in new transactional memory code Michael Neuling
2013-01-18 5:48 ` [PATCH 13/17] powerpc: Add new transactional memory state to the signal context Michael Neuling
2013-01-18 5:48 ` [PATCH 14/17] powerpc: Add transactional memory to POWER8 cpu features Michael Neuling
2013-01-18 5:48 ` [PATCH 15/17] powerpc: Add config option for transactional memory Michael Neuling
2013-01-18 5:48 ` [PATCH 16/17] powerpc: Add transactional memory to pseries and ppc64 defconfigs Michael Neuling
2013-01-18 5:48 ` [PATCH 17/17] powerpc: Documentation for transactional memory on powerpc Michael Neuling
2013-02-13 4:31 ` [PATCH 00/17] powerpc: Hardware transactional memory support for POWER8 Michael Neuling
2013-02-13 4:31 ` [PATCH 01/17] powerpc: Add new CPU feature bit for transactional memory Michael Neuling
2013-02-13 4:31 ` [PATCH 02/17] powerpc: Add new instructions " Michael Neuling
2013-02-13 4:31 ` [PATCH 03/17] powerpc: Add additional state needed for transactional memory to thread struct Michael Neuling
2013-02-13 4:31 ` [PATCH 04/17] powerpc: New macros for transactional memory support Michael Neuling
2013-02-13 4:31 ` [PATCH 05/17] powerpc: Register defines for various transactional memory registers Michael Neuling
2013-02-13 4:31 ` [PATCH 06/17] powerpc: Add transactional memory paca scratch register to show_regs Michael Neuling
2013-02-13 13:52 ` Kumar Gala
2013-02-14 1:53 ` Michael Neuling
2013-02-13 4:31 ` [PATCH 07/17] powerpc: Add helper functions for transactional memory context switching Michael Neuling
2013-02-13 4:31 ` [PATCH 08/17] powerpc: Add FP/VSX and VMX register load functions for transactional memory Michael Neuling
2013-02-13 13:54 ` Kumar Gala
2013-02-14 1:53 ` Michael Neuling
2013-02-13 4:31 ` [PATCH 09/17] powerpc: Add reclaim and recheckpoint functions for context switching transactional memory processes Michael Neuling
2013-02-13 4:31 ` [PATCH 10/17] powerpc: Add transactional memory unavaliable execption handler Michael Neuling
2013-02-13 4:31 ` [PATCH 11/17] powerpc: Routines for FP/VSX/VMX unavailable during a transaction Michael Neuling
2013-02-13 4:31 ` [PATCH 12/17] powerpc: Hook in new transactional memory code Michael Neuling
2013-02-13 4:31 ` [PATCH 13/17] powerpc: Add new transactional memory state to the signal context Michael Neuling
2013-02-13 4:31 ` [PATCH 14/17] powerpc: Add transactional memory to POWER8 cpu features Michael Neuling
2013-02-13 4:31 ` [PATCH 15/17] powerpc: Add config option for transactional memory Michael Neuling
2013-02-13 14:02 ` Kumar Gala
2013-02-14 1:52 ` Michael Neuling
2013-02-13 4:31 ` [PATCH 16/17] powerpc: Add transactional memory to pseries and ppc64 defconfigs Michael Neuling
2013-02-13 4:31 ` [PATCH 17/17] powerpc: Documentation for transactional memory on powerpc Michael Neuling
2013-02-14 2:21 ` [PATCH 00/17] powerpc: Hardware transactional memory support for POWER8 Michael Neuling
2013-02-14 2:21 ` [PATCH 01/17] powerpc: Add new CPU feature bit for transactional memory Michael Neuling
2013-02-14 2:21 ` [PATCH 02/17] powerpc: Add new instructions " Michael Neuling
2013-02-14 2:21 ` [PATCH 03/17] powerpc: Add additional state needed for transactional memory to thread struct Michael Neuling
2013-02-14 2:21 ` [PATCH 04/17] powerpc: New macros for transactional memory support Michael Neuling
2013-02-14 2:21 ` [PATCH 05/17] powerpc: Register defines for various transactional memory registers Michael Neuling
2013-02-14 2:21 ` [PATCH 06/17] powerpc: Add transactional memory paca scratch register to show_regs Michael Neuling
2013-02-14 2:21 ` [PATCH 07/17] powerpc: Add helper functions for transactional memory context switching Michael Neuling
2013-02-14 2:21 ` [PATCH 08/17] powerpc: Add FP/VSX and VMX register load functions for transactional memory Michael Neuling
2013-02-14 2:21 ` [PATCH 09/17] powerpc: Add reclaim and recheckpoint functions for context switching transactional memory processes Michael Neuling
2013-02-14 2:21 ` [PATCH 10/17] powerpc: Add transactional memory unavaliable execption handler Michael Neuling
2013-02-14 2:21 ` [PATCH 11/17] powerpc: Routines for FP/VSX/VMX unavailable during a transaction Michael Neuling
2013-02-14 2:21 ` [PATCH 12/17] powerpc: Hook in new transactional memory code Michael Neuling
2013-02-14 2:21 ` [PATCH 13/17] powerpc: Add new transactional memory state to the signal context Michael Neuling
2013-02-14 2:21 ` [PATCH 14/17] powerpc: Add transactional memory to POWER8 cpu features Michael Neuling
2013-02-14 2:21 ` [PATCH 15/17] powerpc: Add config option for transactional memory Michael Neuling
2013-02-14 2:21 ` [PATCH 16/17] powerpc: Add transactional memory to pseries and ppc64 defconfigs Michael Neuling
2013-02-14 2:21 ` [PATCH 17/17] powerpc: Documentation for transactional memory on powerpc Michael Neuling
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