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[Qemu-devel] [PATCH v3 19/21] kvm: Flush coalesced mmio buffer on IO win
From: |
Jan Kiszka |
Subject: |
[Qemu-devel] [PATCH v3 19/21] kvm: Flush coalesced mmio buffer on IO window exits |
Date: |
Tue, 4 Jan 2011 09:32:31 +0100 |
From: Jan Kiszka <address@hidden>
We must flush pending mmio writes if we leave kvm_cpu_exec for an IO
window. Otherwise we risk to loose those requests when migrating to a
different host during that window.
Signed-off-by: Jan Kiszka <address@hidden>
---
kvm-all.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/kvm-all.c b/kvm-all.c
index 7a5b299..a5e9246 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -851,6 +851,8 @@ void kvm_cpu_exec(CPUState *env)
cpu_single_env = env;
kvm_arch_post_run(env, run);
+ kvm_flush_coalesced_mmio_buffer();
+
if (ret == -EINTR || ret == -EAGAIN) {
cpu_exit(env);
DPRINTF("io window exit\n");
@@ -863,8 +865,6 @@ void kvm_cpu_exec(CPUState *env)
abort();
}
- kvm_flush_coalesced_mmio_buffer();
-
ret = 0; /* exit loop */
switch (run->exit_reason) {
case KVM_EXIT_IO:
--
1.7.1
- [Qemu-devel] [PATCH v3 10/21] kvm: x86: Refactor msr_star/hsave_pa setup and checks, (continued)
[Qemu-devel] [PATCH v3 14/21] kvm: x86: Fix !CONFIG_KVM_PARA build, Jan Kiszka, 2011/01/04
[Qemu-devel] [PATCH v3 16/21] kvm: Drop smp_cpus argument from init functions, Jan Kiszka, 2011/01/04
[Qemu-devel] [PATCH v3 19/21] kvm: Flush coalesced mmio buffer on IO window exits,
Jan Kiszka <=
[Qemu-devel] [PATCH v3 18/21] kvm: x86: Rework identity map and TSS setup for larger BIOS sizes, Jan Kiszka, 2011/01/04
[Qemu-devel] [PATCH v3 20/21] kvm: Do not use qemu_fair_mutex, Jan Kiszka, 2011/01/04
[Qemu-devel] [PATCH v3 15/21] kvm: x86: Introduce kvmclock device to save/restore its state, Jan Kiszka, 2011/01/04
[Qemu-devel] [PATCH v3 21/21] kvm: x86: Implicitly clear nmi_injected/pending on reset, Jan Kiszka, 2011/01/04
[Qemu-devel] [PATCH v3 13/21] kvm: Eliminate KVMState arguments, Jan Kiszka, 2011/01/04