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kvm-all: drop kvm_setup_guest_memory

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kvm_setup_guest_memory only does "madvise to QEMU_MADV_DONTFORK" and
is only called by ram_block_add, which actually is duplicate code.
Bonus: add simple comment for kvm_has_sync_mmu to make life easier.

Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Cao jin <caoj.fnst@cn.fujitsu.com>
Message-Id: <1473662096-32598-1-git-send-email-caoj.fnst@cn.fujitsu.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Cao jin 2016-09-12 14:34:56 +08:00 • committed by Paolo Bonzini
parent a952c18683
commit c2cd627ddb
4 changed files with 2 additions and 22 deletions
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15
kvm-all.c
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@ -2148,6 +2148,7 @@ void kvm_device_access(int fd, int group, uint64_t attr,
}
}
/* Return 1 on success, 0 on failure */
int kvm_has_sync_mmu(void)
{
return kvm_check_extension(kvm_state, KVM_CAP_SYNC_MMU);
@ -2190,20 +2191,6 @@ int kvm_has_intx_set_mask(void)
return kvm_state->intx_set_mask;
}
void kvm_setup_guest_memory(void *start, size_t size)
{
if (!kvm_has_sync_mmu()) {
int ret = qemu_madvise(start, size, QEMU_MADV_DONTFORK);
if (ret) {
perror("qemu_madvise");
fprintf(stderr,
"Need MADV_DONTFORK in absence of synchronous KVM MMU\n");
exit(1);
}
}
}
#ifdef KVM_CAP_SET_GUEST_DEBUG
struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *cpu,
target_ulong pc)