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Unbreak large mem support by removing kqemu

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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>
This commit is contained in:
Anthony Liguori 2009-08-10 17:07:24 -05:00
parent 0953a80f04
commit 4a1418e07b
24 changed files with 8 additions and 1722 deletions
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6
cpu-all.h
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@ -873,7 +873,6 @@ int cpu_memory_rw_debug(CPUState *env, target_ulong addr,
#define VGA_DIRTY_FLAG 0x01
#define CODE_DIRTY_FLAG 0x02
#define KQEMU_DIRTY_FLAG 0x04
#define MIGRATION_DIRTY_FLAG 0x08
/* read dirty bit (return 0 or 1) */
@ -1056,14 +1055,9 @@ static inline int64_t profile_getclock(void)
return cpu_get_real_ticks();
}
extern int64_t kqemu_time, kqemu_time_start;
extern int64_t qemu_time, qemu_time_start;
extern int64_t tlb_flush_time;
extern int64_t kqemu_exec_count;
extern int64_t dev_time;
extern int64_t kqemu_ret_int_count;
extern int64_t kqemu_ret_excp_count;
extern int64_t kqemu_ret_intr_count;
#endif
void cpu_inject_x86_mce(CPUState *cenv, int bank, uint64_t status,