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[Qemu-devel] [PATCH 10/18] kvm: x86: Reset paravirtual MSRs
From: |
Jan Kiszka |
Subject: |
[Qemu-devel] [PATCH 10/18] kvm: x86: Reset paravirtual MSRs |
Date: |
Fri, 21 Jan 2011 21:48:14 +0100 |
From: Jan Kiszka <address@hidden>
Make sure to write the cleared MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK,
and MSR_KVM_ASYNC_PF_EN to the kernel state so that a freshly booted
guest cannot be disturbed by old values.
Signed-off-by: Jan Kiszka <address@hidden>
CC: Glauber Costa <address@hidden>
---
target-i386/kvm.c | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index 454ddb1..825af42 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -845,6 +845,13 @@ static int kvm_put_msrs(CPUState *env, int level)
if (smp_cpus == 1 || env->tsc != 0) {
kvm_msr_entry_set(&msrs[n++], MSR_IA32_TSC, env->tsc);
}
+ }
+ /*
+ * The following paravirtual MSRs have side effects on the guest or are
+ * too heavy for normal writeback. Limit them to reset or full state
+ * updates.
+ */
+ if (level >= KVM_PUT_RESET_STATE) {
kvm_msr_entry_set(&msrs[n++], MSR_KVM_SYSTEM_TIME,
env->system_time_msr);
kvm_msr_entry_set(&msrs[n++], MSR_KVM_WALL_CLOCK, env->wall_clock_msr);
--
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, 2011/01/21
- [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 <=
- [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
- [Qemu-devel] [PATCH 04/18] x86: Optionally dump code bytes on cpu_dump_state, Jan Kiszka, 2011/01/21
- [Qemu-devel] [PATCH 11/18] kvm: x86: Fix !CONFIG_KVM_PARA build, Jan Kiszka, 2011/01/21
- [Qemu-devel] [PATCH 02/18] kvm: Stop on all fatal exit reasons, Jan Kiszka, 2011/01/21
- [Qemu-devel] [PATCH 12/18] kvm: Drop smp_cpus argument from init functions, Jan Kiszka, 2011/01/21
- [Qemu-devel] [PATCH 14/18] kvm: x86: Rework identity map and TSS setup for larger BIOS sizes, Jan Kiszka, 2011/01/21
- [Qemu-devel] [PATCH 08/18] kvm: x86: Fix xcr0 reset mismerge, Jan Kiszka, 2011/01/21
- [Qemu-devel] [PATCH 09/18] kvm: x86: Refactor msr_star/hsave_pa setup and checks, Jan Kiszka, 2011/01/21