qemu/hw/i386
Denis Plotnikov e2b6c1712e kvmclock: update system_time_msr address forcibly
Do an update of system_time_msr address every time before reading
the value of tsc_timestamp from guest's kvmclock page.

There is no other code paths which ensure that qemu has an up-to-date
value of system_time_msr. So, force this update on guest's tsc_timestamp
reading.

This bug causes effect on those nested setups which turn off TPR access
interception for L2 guests and that access being intercepted by L0 doesn't
show up in L1.
Linux bootstrap initiate kvmclock before APIC initializing causing TPR access.
That's why on L1 guests, having TPR interception turned on for L2, the effect
of the bug is not revealed.

This patch fixes this problem by making sure it knows the correct
system_time_msr address every time it is needed.

Signed-off-by: Denis Plotnikov <dplotnikov@virtuozzo.com>
Message-Id: <1496054944-25623-1-git-send-email-dplotnikov@virtuozzo.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-06-07 18:22:02 +02:00
..
kvm kvmclock: update system_time_msr address forcibly 2017-06-07 18:22:02 +02:00
xen Remove/replace sysemu/char.h inclusion 2017-06-02 11:33:52 +04:00
acpi-build.c numa: make sure that all cpus have has_node_id set if numa is enabled 2017-06-05 14:59:08 -03:00
acpi-build.h Use scripts/clean-includes to drop redundant qemu/typedefs.h 2016-03-22 22:20:16 +01:00
amd_iommu.c memory: tune last param of iommu_ops.translate() 2017-05-25 21:25:27 +03:00
amd_iommu.h i386: amd_iommu: fix MMIO register count and access 2016-12-16 01:14:38 +02:00
intel_iommu_internal.h intel_iommu: support passthrough (PT) 2017-05-25 21:25:27 +03:00
intel_iommu.c intel_iommu: support passthrough (PT) 2017-05-25 21:25:27 +03:00
kvmvapic.c kvmvapic: Remove user_creatable flag 2017-05-17 10:37:01 -03:00
Makefile.objs hw/i386: Introduce AMD IOMMU 2016-09-24 01:02:00 +03:00
multiboot.c multiboot: copy the cmdline verbatim, unescape module strings 2016-12-22 16:00:26 +01:00
multiboot.h
pc_piix.c pci, virtio, vhost: fixes 2017-05-18 10:01:08 +01:00
pc_q35.c migration: migration.h was not needed 2017-05-18 19:20:59 +02:00
pc_sysfw.c include/qemu/osdep.h: Don't include qapi/error.h 2016-03-22 22:20:15 +01:00
pc.c numa: make sure that all cpus have has_node_id set if numa is enabled 2017-06-05 14:59:08 -03:00
pci-assign-load-rom.c pci-assign: avoid pointless stat 2017-01-24 23:26:53 +03:00
trace-events intel_iommu: support passthrough (PT) 2017-05-25 21:25:27 +03:00
x86-iommu.c intel_iommu: support passthrough (PT) 2017-05-25 21:25:27 +03:00