[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PATCH v3 11/21] kvm: x86: Reset paravirtual MSRs
From: |
Jan Kiszka |
Subject: |
[Qemu-devel] [PATCH v3 11/21] kvm: x86: Reset paravirtual MSRs |
Date: |
Tue, 4 Jan 2011 09:32:23 +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 d8f26bf..8267655 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 v3 02/21] kvm: Drop return value of kvm_cpu_exec, (continued)
- [Qemu-devel] [PATCH v3 02/21] kvm: Drop return value of kvm_cpu_exec, Jan Kiszka, 2011/01/04
- [Qemu-devel] [PATCH v3 06/21] kvm: x86: Align kvm_arch_put_registers code with comment, Jan Kiszka, 2011/01/04
- [Qemu-devel] [PATCH v3 03/21] kvm: Stop on all fatal exit reasons, Jan Kiszka, 2011/01/04
- [Qemu-devel] [PATCH v3 07/21] kvm: x86: Prepare kvm_get_mp_state for in-kernel irqchip, Jan Kiszka, 2011/01/04
- [Qemu-devel] [PATCH v3 05/21] x86: Optionally dump code bytes on cpu_dump_state, Jan Kiszka, 2011/01/04
- [Qemu-devel] [PATCH v3 01/21] kvm: Fix coding style violations, Jan Kiszka, 2011/01/04
- [Qemu-devel] [PATCH v3 08/21] kvm: x86: Remove redundant mp_state initialization, Jan Kiszka, 2011/01/04
- [Qemu-devel] [PATCH v3 04/21] kvm: Improve reporting of fatal errors, Jan Kiszka, 2011/01/04
- [Qemu-devel] [PATCH v3 09/21] kvm: x86: Fix xcr0 reset mismerge, Jan Kiszka, 2011/01/04
- [Qemu-devel] [PATCH v3 10/21] kvm: x86: Refactor msr_star/hsave_pa setup and checks, Jan Kiszka, 2011/01/04
- [Qemu-devel] [PATCH v3 11/21] kvm: x86: Reset paravirtual MSRs,
Jan Kiszka <=
- [Qemu-devel] [PATCH v3 12/21] kvm: x86: Drop MCE MSRs write back restrictions, Jan Kiszka, 2011/01/04
[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, 2011/01/04
[Qemu-devel] [PATCH v3 18/21] kvm: x86: Rework identity map and TSS setup for larger BIOS sizes, Jan Kiszka, 2011/01/04