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HV: Use mmio_read/write_long for IOAPIC mmio-access

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This is to do the clean-up of IOAPIC mmio-access. Use the same API to
access the IOAPIC register. At the same time it also helps to avoid the
optimization in direct access mode.(The volatile is already added in
mmio_read_long/mmio_write_long)

V1->V2: Follow Fengwei's suggestion to use the mmio_read/write_long

Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Reviewed-by:  Yin Fengwei <fengwei.yin@intel.com>
This commit is contained in:
Zhao Yakui 2018-04-20 10:42:13 +08:00 committed by Jack Ren
parent ec13f4e1f2
commit b37c049ef4
1 changed files with 4 additions and 4 deletions
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8
hypervisor/arch/x86/ioapic.c
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@ -95,9 +95,9 @@ ioapic_read_reg32(const void *ioapic_base, const uint8_t offset)
spinlock_irqsave_obtain(&ioapic_lock);
/* Write IOREGSEL */
*(uint32_t *)(ioapic_base) = offset;
mmio_write_long(offset, (void *)ioapic_base);
/* Read IOWIN */
v = *(uint32_t *)(ioapic_base + IOAPIC_WINSWL_OFFSET);
v = mmio_read_long((void *)ioapic_base + IOAPIC_WINSWL_OFFSET);
spinlock_irqrestore_release(&ioapic_lock);
return v;
@ -112,9 +112,9 @@ ioapic_write_reg32(const void *ioapic_base,
spinlock_irqsave_obtain(&ioapic_lock);
/* Write IOREGSEL */
*(uint32_t *)(ioapic_base) = offset;
mmio_write_long(offset, (void *)ioapic_base);
/* Write IOWIN */
*(uint32_t *)(ioapic_base + IOAPIC_WINSWL_OFFSET) = value;
mmio_write_long(value, (void *)ioapic_base + IOAPIC_WINSWL_OFFSET);
spinlock_irqrestore_release(&ioapic_lock);
}