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[PULL 01/11] i386: clarify 'hv-passthrough' behavior
From: |
Eduardo Habkost |
Subject: |
[PULL 01/11] i386: clarify 'hv-passthrough' behavior |
Date: |
Tue, 13 Jul 2021 12:09:47 -0400 |
From: Vitaly Kuznetsov <vkuznets@redhat.com>
Clarify the fact that 'hv-passthrough' only enables features which are
already known to QEMU and that it overrides all other 'hv-*' settings.
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20210608120817.1325125-3-vkuznets@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
docs/hyperv.txt | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/docs/hyperv.txt b/docs/hyperv.txt
index e53c581f458..a51953daa83 100644
--- a/docs/hyperv.txt
+++ b/docs/hyperv.txt
@@ -209,8 +209,11 @@ In some cases (e.g. during development) it may make sense
to use QEMU in
'pass-through' mode and give Windows guests all enlightenments currently
supported by KVM. This pass-through mode is enabled by "hv-passthrough" CPU
flag.
-Note: enabling this flag effectively prevents migration as supported features
-may differ between target and destination.
+Note: "hv-passthrough" flag only enables enlightenments which are known to QEMU
+(have corresponding "hv-*" flag) and copies "hv-spinlocks="/"hv-vendor-id="
+values from KVM to QEMU. "hv-passthrough" overrides all other "hv-*" settings
on
+the command line. Also, enabling this flag effectively prevents migration as
the
+list of enabled enlightenments may differ between target and destination hosts.
4. Useful links
--
2.31.1
- [PULL 00/11] x86 queue, 2021-07-13, Eduardo Habkost, 2021/07/13
- [PULL 03/11] i386: make hyperv_expand_features() return bool, Eduardo Habkost, 2021/07/13
- [PULL 04/11] i386: expand Hyper-V features during CPU feature expansion time, Eduardo Habkost, 2021/07/13
- [PULL 05/11] i386: kill off hv_cpuid_check_and_set(), Eduardo Habkost, 2021/07/13
- [PULL 01/11] i386: clarify 'hv-passthrough' behavior,
Eduardo Habkost <=
- [PULL 06/11] i386: HV_HYPERCALL_AVAILABLE privilege bit is always needed, Eduardo Habkost, 2021/07/13
- [PULL 07/11] i386: Hyper-V SynIC requires POST_MESSAGES/SIGNAL_EVENTS privileges, Eduardo Habkost, 2021/07/13
- [PULL 10/11] numa: Report expected initiator, Eduardo Habkost, 2021/07/13
- [PULL 11/11] numa: Parse initiator= attribute before cpus= attribute, Eduardo Habkost, 2021/07/13
- [PULL 02/11] i386: hardcode supported eVMCS version to '1', Eduardo Habkost, 2021/07/13
- [PULL 08/11] target/i386: suppress CPUID leaves not defined by the CPU vendor, Eduardo Habkost, 2021/07/13
- [PULL 09/11] target/i386: Fix cpuid level for AMD, Eduardo Habkost, 2021/07/13
- Re: [PULL 00/11] x86 queue, 2021-07-13, Peter Maydell, 2021/07/14