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[Qemu-devel] [PATCH 23/31] kvm: x86: Reset paravirtual MSRs
From: |
Marcelo Tosatti |
Subject: |
[Qemu-devel] [PATCH 23/31] kvm: x86: Reset paravirtual MSRs |
Date: |
Mon, 24 Jan 2011 07:02:32 -0200 |
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>
Signed-off-by: Marcelo Tosatti <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);
--
1.7.2.3
- [Qemu-devel] [PATCH 07/31] kvm: kvm_mce_inj_* subroutines for templated error injections, (continued)
- [Qemu-devel] [PATCH 07/31] kvm: kvm_mce_inj_* subroutines for templated error injections, Marcelo Tosatti, 2011/01/24
- [Qemu-devel] [PATCH 13/31] kvm: Fix coding style violations, Marcelo Tosatti, 2011/01/24
- [Qemu-devel] [PATCH 08/31] kvm: introduce kvm_inject_x86_mce_on, Marcelo Tosatti, 2011/01/24
- [Qemu-devel] [PATCH 14/31] kvm: x86: Swallow KVM_EXIT_SET_TPR, Marcelo Tosatti, 2011/01/24
- [Qemu-devel] [PATCH 09/31] kvm: x86: Fix DPL write back of segment registers, Marcelo Tosatti, 2011/01/24
- [Qemu-devel] [PATCH 29/31] kvm: Do not use qemu_fair_mutex, Marcelo Tosatti, 2011/01/24
- [Qemu-devel] [PATCH 18/31] kvm: x86: Align kvm_arch_put_registers code with comment, Marcelo Tosatti, 2011/01/24
- [Qemu-devel] [PATCH 10/31] kvm: x86: Remove obsolete SS.RPL/DPL aligment, Marcelo Tosatti, 2011/01/24
- [Qemu-devel] [PATCH 21/31] kvm: x86: Fix xcr0 reset mismerge, Marcelo Tosatti, 2011/01/24
- [Qemu-devel] [PATCH 20/31] kvm: x86: Remove redundant mp_state initialization, Marcelo Tosatti, 2011/01/24
- [Qemu-devel] [PATCH 23/31] kvm: x86: Reset paravirtual MSRs,
Marcelo Tosatti <=
- [Qemu-devel] [PATCH 27/31] kvm: x86: Rework identity map and TSS setup for larger BIOS sizes, Marcelo Tosatti, 2011/01/24
- [Qemu-devel] [PATCH 25/31] kvm: Drop smp_cpus argument from init functions, Marcelo Tosatti, 2011/01/24
- [Qemu-devel] [PATCH 16/31] kvm: Improve reporting of fatal errors, Marcelo Tosatti, 2011/01/24
- [Qemu-devel] [PATCH 06/31] kvm: introduce kvm_mce_in_progress, Marcelo Tosatti, 2011/01/24
- [Qemu-devel] [PATCH 12/31] kvm: x86: Fix a few coding style violations, Marcelo Tosatti, 2011/01/24
- [Qemu-devel] [PATCH 26/31] kvm: Consolidate must-have capability checks, Marcelo Tosatti, 2011/01/24