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Commit 9964f396 authored by Sebastian Ott's avatar Sebastian Ott Committed by Vasily Gorbik
Browse files

s390: fix setting of mio addressing control 



Move enablement of mio addressing control from detect_machine_facilities
to pci_base_init. detect_machine_facilities runs so early that the
static branches have not been toggled yet, thus mio addressing control
was always off. In pci_base_init we have to use the SMP aware
ctl_set_bit though.

Fixes: 833b441e ("s390: enable processes for mio instructions")
Signed-off-by: default avatarSebastian Ott <sebott@linux.ibm.com>
Signed-off-by: default avatarVasily Gorbik <gor@linux.ibm.com>
parent 1b2be207

arch/s390/include/asm/pci_insn.h

+0 −10
Original line number Diff line number Diff line
@@ -143,14 +143,4 @@ static inline int zpci_set_irq_ctrl(u16 ctl, u8 isc) 
	return __zpci_set_irq_ctrl(ctl, isc, &iib);

}



#ifdef CONFIG_PCI

static inline void enable_mio_ctl(void)

{

	if (static_branch_likely(&have_mio))

		__ctl_set_bit(2, 5);

}

#else /* CONFIG_PCI */

static inline void enable_mio_ctl(void) {}

#endif /* CONFIG_PCI */



#endif

arch/s390/kernel/early.c

+0 −2
Original line number Diff line number Diff line
@@ -30,7 +30,6 @@ 
#include <asm/sclp.h>

#include <asm/facility.h>

#include <asm/boot_data.h>

#include <asm/pci_insn.h>

#include "entry.h"



/*
@@ -236,7 +235,6 @@ static __init void detect_machine_facilities(void) 
		clock_comparator_max = -1ULL >> 1;

		__ctl_set_bit(0, 53);

	}

	enable_mio_ctl();

}



static inline void save_vector_registers(void)

arch/s390/pci/pci.c

+3 −1
Original line number Diff line number Diff line
@@ -890,8 +890,10 @@ static int __init pci_base_init(void) 
	if (!test_facility(69) || !test_facility(71))

		return 0;



	if (test_facility(153) && !s390_pci_no_mio)

	if (test_facility(153) && !s390_pci_no_mio) {

		static_branch_enable(&have_mio);

		ctl_set_bit(2, 5);

	}



	rc = zpci_debug_init();

	if (rc)