Unbreak large mem support by removing kqemu

kqemu introduces a number of restrictions on the i386 target.  The worst is that
it prevents large memory from working in the default build.

Furthermore, kqemu is fundamentally flawed in a number of ways.  It relies on
the TSC as a time source which will not be reliable on a multiple processor
system in userspace.  Since most modern processors are multicore, this severely
limits the utility of kqemu.

kvm is a viable alternative for people looking to accelerate qemu and has the
benefit of being supported by the upstream Linux kernel.  If someone can
implement work arounds to remove the restrictions introduced by kqemu, I'm
happy to avoid and/or revert this patch.

N.B. kqemu will still function in the 0.11 series but this patch removes it from
the 0.12 series.

Paul, please Ack or Nack this patch.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 0 insertions, 24 deletions

diff --git a/ioport.c b/ioport.c
index 13183a2f0e..d90d938494 100644
--- a/ioport.c
+++ b/ioport.c
@@ -196,30 +196,18 @@ void cpu_outb(CPUState *env, pio_addr_t addr, uint8_t val)
 {
     LOG_IOPORT("outb: %04"FMT_pioaddr" %02"PRIx8"\n", addr, val);
     ioport_write(0, addr, val);
-#ifdef CONFIG_KQEMU
-    if (env)
-        env->last_io_time = cpu_get_time_fast();
-#endif
 }
 
 void cpu_outw(CPUState *env, pio_addr_t addr, uint16_t val)
 {
     LOG_IOPORT("outw: %04"FMT_pioaddr" %04"PRIx16"\n", addr, val);
     ioport_write(1, addr, val);
-#ifdef CONFIG_KQEMU
-    if (env)
-        env->last_io_time = cpu_get_time_fast();
-#endif
 }
 
 void cpu_outl(CPUState *env, pio_addr_t addr, uint32_t val)
 {
     LOG_IOPORT("outl: %04"FMT_pioaddr" %08"PRIx32"\n", addr, val);
     ioport_write(2, addr, val);
-#ifdef CONFIG_KQEMU
-    if (env)
-        env->last_io_time = cpu_get_time_fast();
-#endif
 }
 
 uint8_t cpu_inb(CPUState *env, pio_addr_t addr)
@@ -227,10 +215,6 @@ uint8_t cpu_inb(CPUState *env, pio_addr_t addr)
     uint8_t val;
     val = ioport_read(0, addr);
     LOG_IOPORT("inb : %04"FMT_pioaddr" %02"PRIx8"\n", addr, val);
-#ifdef CONFIG_KQEMU
-    if (env)
-        env->last_io_time = cpu_get_time_fast();
-#endif
     return val;
 }
 
@@ -239,10 +223,6 @@ uint16_t cpu_inw(CPUState *env, pio_addr_t addr)
     uint16_t val;
     val = ioport_read(1, addr);
     LOG_IOPORT("inw : %04"FMT_pioaddr" %04"PRIx16"\n", addr, val);
-#ifdef CONFIG_KQEMU
-    if (env)
-        env->last_io_time = cpu_get_time_fast();
-#endif
     return val;
 }
 
@@ -251,9 +231,5 @@ uint32_t cpu_inl(CPUState *env, pio_addr_t addr)
     uint32_t val;
     val = ioport_read(2, addr);
     LOG_IOPORT("inl : %04"FMT_pioaddr" %08"PRIx32"\n", addr, val);
-#ifdef CONFIG_KQEMU
-    if (env)
-        env->last_io_time = cpu_get_time_fast();
-#endif
     return val;
 }