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Commit 20bb25d1 authored by Ralf Baechle's avatar Ralf Baechle
Browse files

[MIPS] SMTC: Fix false trigger of debug code on single VPE. 



Make smtc_setup_irq() update the list of interrupts which need to be
watched by the debug code itself.  Also there is no need to initialize the
IPI swint when running with a single VPE, so don't initialize it.

Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent ae036b79

arch/mips/kernel/smtc.c

+15 −5
Original line number Diff line number Diff line
@@ -77,7 +77,7 @@ static struct smtc_ipi_q freeIPIq; 


void ipi_decode(struct smtc_ipi *);

static void post_direct_ipi(int cpu, struct smtc_ipi *pipi);

static void setup_cross_vpe_interrupts(void);

static void setup_cross_vpe_interrupts(unsigned int nvpe);

void init_smtc_stats(void);



/* Global SMTC Status */
@@ -170,7 +170,10 @@ __setup("tintq=", tintq); 


int imstuckcount[2][8];

/* vpemask represents IM/IE bits of per-VPE Status registers, low-to-high */

int vpemask[2][8] = {{0,1,1,0,0,0,0,1},{0,1,0,0,0,0,0,1}};

int vpemask[2][8] = {

	{0, 0, 1, 0, 0, 0, 0, 1},

	{0, 0, 0, 0, 0, 0, 0, 1}

};

int tcnoprog[NR_CPUS];

static atomic_t idle_hook_initialized = {0};

static int clock_hang_reported[NR_CPUS];
@@ -503,8 +506,7 @@ void mipsmt_prepare_cpus(void) 


	/* If we have multiple VPEs running, set up the cross-VPE interrupt */



	if (nvpe > 1)

		setup_cross_vpe_interrupts();

	setup_cross_vpe_interrupts(nvpe);



	/* Set up queue of free IPI "messages". */

	nipi = NR_CPUS * IPIBUF_PER_CPU;
@@ -609,7 +611,12 @@ void smtc_cpus_done(void) 
int setup_irq_smtc(unsigned int irq, struct irqaction * new,

			unsigned long hwmask)

{

	unsigned int vpe = current_cpu_data.vpe_id;



	irq_hwmask[irq] = hwmask;

#ifdef CONFIG_SMTC_IDLE_HOOK_DEBUG

	vpemask[vpe][irq - MIPSCPU_INT_BASE] = 1;

#endif



	return setup_irq(irq, new);

}
@@ -970,8 +977,11 @@ static void ipi_irq_dispatch(void) 


static struct irqaction irq_ipi;



static void setup_cross_vpe_interrupts(void)

static void setup_cross_vpe_interrupts(unsigned int nvpe)

{

	if (nvpe < 1)

		return;



	if (!cpu_has_vint)

		panic("SMTC Kernel requires Vectored Interupt support");