kvm,8250: Fix ->counter clearing

We need to reset the counter to zero before we inject an interrupt to the
guest.

Signed-off-by: Pekka Enberg <penberg@kernel.org>

kvm,8250: Fix "too much work for irq4" problems

This patch fixes the "too much work for irq4" problems caused by the fact that
we never set the UART_IIR_NO_INT flag in the emulation layer. This make

kvm,8250: Fix "too much work for irq4" problems

This patch fixes the "too much work for irq4" problems caused by the fact that
we never set the UART_IIR_NO_INT flag in the emulation layer. This makes the
interrupt handler in the guest kernel process as much as possible which
triggers a warning.

Signed-off-by: Pekka Enberg <penberg@kernel.org>

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kvm,8250: Make ttyS1 and ttyS2 disabled

This patch fixes the 8250 serial emulation to not have undefined ioports but
rather make them explicitly disabled.

Signed-off-by: Pekka Enberg <penberg@kerne

kvm,8250: Make ttyS1 and ttyS2 disabled

This patch fixes the 8250 serial emulation to not have undefined ioports but
rather make them explicitly disabled.

Signed-off-by: Pekka Enberg <penberg@kernel.org>

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kvm: Support for more than one serial ttys

Signed-off-by: Pekka Enberg <penberg@kernel.org>

kvm: Improve 8250 serial console interrupt handling

Signed-off-by: Pekka Enberg <penberg@kernel.org>

8250-serial: Make transmitter being always ready to send data

Otherwise it causes kernel to do additional timeout
waiting for THR being empty.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>

8250-serial: Use linux/serial-reg.h with predefined constants

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>

8250-serial: Simplify is_readable function

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>

kvm,8250: Implement serial input support

Signed-off-by: Pekka Enberg <penberg@kernel.org>

kvm,8250: Inject interrupts to guest

This patch fixes 8250 emulation to inject interrupts to guest so we actually
see what's sent to the serial console.

Signed-off-by: Pekka Enberg <penberg@kernel.

kvm,8250: Inject interrupts to guest

This patch fixes 8250 emulation to inject interrupts to guest so we actually
see what's sent to the serial console.

Signed-off-by: Pekka Enberg <penberg@kernel.org>

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kvm: Rename early_printk.c to 8250-serial.c

The 8250 emulation is no longer there to just support early_printk() so rename
the source file to reflect that.

Signed-off-by: Pekka Enberg <penberg@kern

kvm: Rename early_printk.c to 8250-serial.c

The 8250 emulation is no longer there to just support early_printk() so rename
the source file to reflect that.

Signed-off-by: Pekka Enberg <penberg@kernel.org>

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kvm: Implement support interrupt injection

This patch implement support for injecting interrupts from the userspace
hypervisor to the guest.

Signed-off-by: Pekka Enberg <penberg@kernel.org>

kvm,serial: Enable THRI bit in IIR register

This patch enables the THRI ("transmission holding register empty") bit in the
IIR register to make sure the guest doesn't think we have data waiting for

kvm,serial: Enable THRI bit in IIR register

This patch enables the THRI ("transmission holding register empty") bit in the
IIR register to make sure the guest doesn't think we have data waiting for it.

Signed-off-by: Pekka Enberg <penberg@kernel.org>

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kvm: Fix magic numbers in 8250 support

Signed-off-by: Pekka Enberg <penberg@kernel.org>

kvm: Improve 8250 serial console support

Signed-off-by: Pekka Enberg <penberg@kernel.org>

kvm: Redirect serial console to stdout, not stderr

Signed-off-by: Pekka Enberg <penberg@kernel.org>

kvm: Support MSR register for serial console

Signed-off-by: Pekka Enberg <penberg@kernel.org>

kvm: Add port range to ioport__register()

This patch adds a 'count' argument to ioport__register() to allow callers to
register a range of ioports.

Signed-off-by: Pekka Enberg <penberg@kernel.org>

kvm: Add some more ioport emulation

This patch adds some more ioport emulation code so that I can boot a Linux
kernel cleanly with "--ioport-debug" command line option enabled.

Signed-off-by: Pekka

kvm: Add some more ioport emulation

This patch adds some more ioport emulation code so that I can boot a Linux
kernel cleanly with "--ioport-debug" command line option enabled.

Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>

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early_printk: Simplify the code

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>

early_printk.c: add rep/outsb support

Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>

kvm: Flush stdout for early printk

Make sure we flush stdout for early printk so that we can see what's really
going on when a kernel gets stuck.

Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>

kvm: Clean up early serial code

Use similar constants and variable names as in arch/x86/kernel/early_printk.c
in the Linux kernel.

Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>

kvm: Add support for early serial printk

Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>