From: "Ian Munsie" <imunsie@au1.ibm.com>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Michael Neuling <mikey@neuling.org>,
linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
Ian Munsie <imunsie@au1.ibm.com>
Subject: [PATCH 3/7] powerpc: Add book3s privileged doorbell exception vectors
Date: Thu, 15 Nov 2012 15:49:46 +1100 [thread overview]
Message-ID: <1352954990-2858-4-git-send-email-imunsie@au1.ibm.com> (raw)
In-Reply-To: <1352954990-2858-1-git-send-email-imunsie@au1.ibm.com>
From: Ian Munsie <imunsie@au1.ibm.com>
Directed Privileged Doorbell Interrupts come in at 0xa00 (or
0xc000000000004a00 if relocation on exception is enabled), so add
exception vectors at these locations.
If doorbell support is not compiled in we handle it as an
unknown_exception.
Signed-off-by: Ian Munsie <imunsie@au1.ibm.com>
Tested-by: Michael Neuling <mikey@neuling.org>
---
arch/powerpc/include/asm/exception-64s.h | 1 +
arch/powerpc/kernel/exceptions-64s.S | 9 +++++++--
2 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/include/asm/exception-64s.h b/arch/powerpc/include/asm/exception-64s.h
index 9d5367e..b1edd80 100644
--- a/arch/powerpc/include/asm/exception-64s.h
+++ b/arch/powerpc/include/asm/exception-64s.h
@@ -305,6 +305,7 @@ label##_relon_hv: \
#define SOFTEN_VALUE_0x502 PACA_IRQ_EE
#define SOFTEN_VALUE_0x900 PACA_IRQ_DEC
#define SOFTEN_VALUE_0x982 PACA_IRQ_DEC
+#define SOFTEN_VALUE_0xa00 PACA_IRQ_DBELL
#define SOFTEN_VALUE_0xe80 PACA_IRQ_DBELL
#define SOFTEN_VALUE_0xe82 PACA_IRQ_DBELL
diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
index d08a3cd..176bf99 100644
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -252,7 +252,7 @@ hardware_interrupt_hv:
MASKABLE_EXCEPTION_PSERIES(0x900, 0x900, decrementer)
STD_EXCEPTION_HV(0x980, 0x982, hdecrementer)
- STD_EXCEPTION_PSERIES(0xa00, 0xa00, trap_0a)
+ MASKABLE_EXCEPTION_PSERIES(0xa00, 0xa00, doorbell_super)
KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xa00)
STD_EXCEPTION_PSERIES(0xb00, 0xb00, trap_0b)
@@ -655,7 +655,11 @@ machine_check_common:
STD_EXCEPTION_COMMON_ASYNC(0x500, hardware_interrupt, do_IRQ)
STD_EXCEPTION_COMMON_ASYNC(0x900, decrementer, .timer_interrupt)
STD_EXCEPTION_COMMON(0x980, hdecrementer, .hdec_interrupt)
- STD_EXCEPTION_COMMON(0xa00, trap_0a, .unknown_exception)
+#ifdef CONFIG_PPC_DOORBELL
+ STD_EXCEPTION_COMMON_ASYNC(0xa00, doorbell_super, .doorbell_exception)
+#else
+ STD_EXCEPTION_COMMON_ASYNC(0xa00, doorbell_super, .unknown_exception)
+#endif
STD_EXCEPTION_COMMON(0xb00, trap_0b, .unknown_exception)
STD_EXCEPTION_COMMON(0xd00, single_step, .single_step_exception)
STD_EXCEPTION_COMMON(0xe00, trap_0e, .unknown_exception)
@@ -755,6 +759,7 @@ hardware_interrupt_relon_hv:
STD_RELON_EXCEPTION_PSERIES(0x4800, 0x800, fp_unavailable)
MASKABLE_RELON_EXCEPTION_PSERIES(0x4900, 0x900, decrementer)
STD_RELON_EXCEPTION_HV(0x4980, 0x982, hdecrementer)
+ MASKABLE_RELON_EXCEPTION_PSERIES(0x4a00, 0xa00, doorbell_super)
STD_RELON_EXCEPTION_PSERIES(0x4b00, 0xb00, trap_0b)
. = 0x4c00
--
1.7.10.4
next prev parent reply other threads:[~2012-11-15 4:50 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-15 4:49 powerpc: Add support for POWER8 directed doorbell interrupts Ian Munsie
2012-11-15 4:49 ` [PATCH 1/7] powerpc: Define differences between doorbells on book3e and book3s Ian Munsie
2012-11-15 4:49 ` [PATCH 2/7] powerpc: Add book3s hypervisor doorbell exception vectors Ian Munsie
2012-11-15 4:49 ` Ian Munsie [this message]
2012-11-15 4:49 ` [PATCH 4/7] powerpc: Select either privileged or hypervisor doorbell when sending Ian Munsie
2012-11-15 4:49 ` [PATCH 5/7] powerpc: Add code to handle soft-disabled doorbells on server Ian Munsie
2012-11-15 4:49 ` [PATCH 6/7] powerpc: Update Kconfig + Makefile to prepare for server doorbells Ian Munsie
2012-11-15 4:49 ` [PATCH 7/7] powerpc: Hook up doorbells on server Ian Munsie
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