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[Qemu-devel] [PATCH 15/18] kvm: Flush coalesced mmio buffer on IO window
From: |
Jan Kiszka |
Subject: |
[Qemu-devel] [PATCH 15/18] kvm: Flush coalesced mmio buffer on IO window exits |
Date: |
Fri, 21 Jan 2011 21:48:19 +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 3a1f63b..9976762 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -918,6 +918,8 @@ int 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");
@@ -930,8 +932,6 @@ int 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 00/18] [uq/master] Rebased patch queue, part I, Jan Kiszka, 2011/01/21
- [Qemu-devel] [PATCH 15/18] kvm: Flush coalesced mmio buffer on IO window exits,
Jan Kiszka <=
- [Qemu-devel] [PATCH 16/18] kvm: Do not use qemu_fair_mutex, Jan Kiszka, 2011/01/21
- [Qemu-devel] [PATCH 18/18] kvm: x86: Only read/write MSR_KVM_ASYNC_PF_EN if supported, Jan Kiszka, 2011/01/21
- [Qemu-devel] [PATCH 17/18] kvm: x86: Implicitly clear nmi_injected/pending on reset, Jan Kiszka, 2011/01/21
- [Qemu-devel] [PATCH 13/18] kvm: Consolidate must-have capability checks, Jan Kiszka, 2011/01/21
- [Qemu-devel] [PATCH 06/18] kvm: x86: Prepare kvm_get_mp_state for in-kernel irqchip, Jan Kiszka, 2011/01/21
- [Qemu-devel] [PATCH 05/18] kvm: x86: Align kvm_arch_put_registers code with comment, Jan Kiszka, 2011/01/21
- [Qemu-devel] [PATCH 03/18] kvm: Improve reporting of fatal errors, Jan Kiszka, 2011/01/21
- [Qemu-devel] [PATCH 10/18] kvm: x86: Reset paravirtual MSRs, Jan Kiszka, 2011/01/21
- [Qemu-devel] [PATCH 01/18] kvm: x86: Swallow KVM_EXIT_SET_TPR, Jan Kiszka, 2011/01/21
- [Qemu-devel] [PATCH 07/18] kvm: x86: Remove redundant mp_state initialization, Jan Kiszka, 2011/01/21