Commit 0869b6fd authored by Mahesh Salgaonkar's avatar Mahesh Salgaonkar Committed by Benjamin Herrenschmidt
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powerpc/book3s: Add basic infrastructure to handle HMI in Linux. 



Handle Hypervisor Maintenance Interrupt (HMI) in Linux. This patch implements
basic infrastructure to handle HMI in Linux host. The design is to invoke
opal handle hmi in real mode for recovery and set irq_pending when we hit HMI.
During check_irq_replay pull opal hmi event and print hmi info on console.

Signed-off-by: default avatarMahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent 84f1966e

arch/powerpc/include/asm/exception-64s.h

+2 −0
Original line number Diff line number Diff line
@@ -425,6 +425,8 @@ label##_relon_hv: \ 
#define SOFTEN_VALUE_0xa00	PACA_IRQ_DBELL

#define SOFTEN_VALUE_0xe80	PACA_IRQ_DBELL

#define SOFTEN_VALUE_0xe82	PACA_IRQ_DBELL

#define SOFTEN_VALUE_0xe60	PACA_IRQ_HMI

#define SOFTEN_VALUE_0xe62	PACA_IRQ_HMI



#define __SOFTEN_TEST(h, vec)						\

	lbz	r10,PACASOFTIRQEN(r13);					\

arch/powerpc/include/asm/hardirq.h

+1 −0
Original line number Diff line number Diff line
@@ -11,6 +11,7 @@ typedef struct { 
	unsigned int pmu_irqs;

	unsigned int mce_exceptions;

	unsigned int spurious_irqs;

	unsigned int hmi_exceptions;

#ifdef CONFIG_PPC_DOORBELL

	unsigned int doorbell_irqs;

#endif

arch/powerpc/include/asm/hw_irq.h

+1 −0
Original line number Diff line number Diff line
@@ -25,6 +25,7 @@ 
#define PACA_IRQ_EE		0x04

#define PACA_IRQ_DEC		0x08 /* Or FIT */

#define PACA_IRQ_EE_EDGE	0x10 /* BookE only */

#define PACA_IRQ_HMI		0x20



#endif /* CONFIG_PPC64 */

arch/powerpc/include/asm/kvm_asm.h

+1 −0
Original line number Diff line number Diff line
@@ -98,6 +98,7 @@ 
#define BOOK3S_INTERRUPT_H_DATA_STORAGE	0xe00

#define BOOK3S_INTERRUPT_H_INST_STORAGE	0xe20

#define BOOK3S_INTERRUPT_H_EMUL_ASSIST	0xe40

#define BOOK3S_INTERRUPT_HMI		0xe60

#define BOOK3S_INTERRUPT_H_DOORBELL	0xe80

#define BOOK3S_INTERRUPT_PERFMON	0xf00

#define BOOK3S_INTERRUPT_ALTIVEC	0xf20

arch/powerpc/include/asm/machdep.h

+4 −0
Original line number Diff line number Diff line
@@ -174,6 +174,10 @@ struct machdep_calls { 
	/* Exception handlers */

	int		(*system_reset_exception)(struct pt_regs *regs);

	int 		(*machine_check_exception)(struct pt_regs *regs);

	int		(*handle_hmi_exception)(struct pt_regs *regs);



	/* Early exception handlers called in realmode */

	int		(*hmi_exception_early)(struct pt_regs *regs);



	/* Called during machine check exception to retrive fixup address. */

	bool		(*mce_check_early_recovery)(struct pt_regs *regs);

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