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[Qemu-devel] [PATCH 32/35] kvm: Flush coalesced mmio buffer on IO window
From: |
Marcelo Tosatti |
Subject: |
[Qemu-devel] [PATCH 32/35] kvm: Flush coalesced mmio buffer on IO window exits |
Date: |
Thu, 6 Jan 2011 15:56:38 -0200 |
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>
Signed-off-by: Marcelo Tosatti <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:
--
1.7.2.3
- [Qemu-devel] [PATCH 00/35] [PULL] qemu-kvm.git uq/master queue, Marcelo Tosatti, 2011/01/06
- [Qemu-devel] [PATCH 19/35] kvm: x86: Prepare kvm_get_mp_state for in-kernel irqchip, Marcelo Tosatti, 2011/01/06
- [Qemu-devel] [PATCH 29/35] kvm: Drop smp_cpus argument from init functions, Marcelo Tosatti, 2011/01/06
- [Qemu-devel] [PATCH 08/35] kvm: introduce kvm_inject_x86_mce_on, Marcelo Tosatti, 2011/01/06
- [Qemu-devel] [PATCH 01/35] kvm: Enable user space NMI injection for kvm guest, Marcelo Tosatti, 2011/01/06
- [Qemu-devel] [PATCH 30/35] kvm: Consolidate must-have capability checks, Marcelo Tosatti, 2011/01/06
- [Qemu-devel] [PATCH 09/35] kvm: x86: Fix DPL write back of segment registers, Marcelo Tosatti, 2011/01/06
- [Qemu-devel] [PATCH 34/35] kvm: x86: Implicitly clear nmi_injected/pending on reset, Marcelo Tosatti, 2011/01/06
- [Qemu-devel] [PATCH 11/35] kvm: x86: Prevent sign extension of DR7 in guest debugging mode, Marcelo Tosatti, 2011/01/06
- [Qemu-devel] [PATCH 23/35] kvm: x86: Reset paravirtual MSRs, Marcelo Tosatti, 2011/01/06
- [Qemu-devel] [PATCH 32/35] kvm: Flush coalesced mmio buffer on IO window exits,
Marcelo Tosatti <=
- [Qemu-devel] [PATCH 22/35] kvm: x86: Refactor msr_star/hsave_pa setup and checks, Marcelo Tosatti, 2011/01/06
- [Qemu-devel] [PATCH 02/35] kvm: convert kvm_ioctl(KVM_CHECK_EXTENSION) to kvm_check_extension(), Marcelo Tosatti, 2011/01/06
- [Qemu-devel] [PATCH 27/35] kvm: x86: Fix !CONFIG_KVM_PARA build, Marcelo Tosatti, 2011/01/06
- [Qemu-devel] [PATCH 20/35] kvm: x86: Remove redundant mp_state initialization, Marcelo Tosatti, 2011/01/06
- [Qemu-devel] [PATCH 13/35] kvm: Fix coding style violations, Marcelo Tosatti, 2011/01/06
- [Qemu-devel] [PATCH 35/35] kvm: x86: Only read/write MSR_KVM_ASYNC_PF_EN if supported, Marcelo Tosatti, 2011/01/06
- [Qemu-devel] [PATCH 24/35] Synchronize VCPU states before reset, Marcelo Tosatti, 2011/01/06
- [Qemu-devel] [PATCH 10/35] kvm: x86: Remove obsolete SS.RPL/DPL aligment, Marcelo Tosatti, 2011/01/06
- [Qemu-devel] [PATCH 14/35] kvm: Drop return value of kvm_cpu_exec, Marcelo Tosatti, 2011/01/06