Introduce support for confidential guest reset

[PATCH v1 05/28] accel/kvm: mark guest state as unprotected after vm file descriptor change

Ani Sinha posted 28 patches 1 day, 15 hours ago

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Maintainers: Paolo Bonzini <pbonzini@redhat.com>, "Maciej S. Szmigiero" <maciej.szmigiero@oracle.com>, "Michael S. Tsirkin" <mst@redhat.com>, Marcel Apfelbaum <marcel.apfelbaum@gmail.com>, Richard Henderson <richard.henderson@linaro.org>, Eduardo Habkost <eduardo@habkost.net>, David Woodhouse <dwmw2@infradead.org>, Paul Durrant <paul@xen.org>, Bernhard Beschow <shentey@gmail.com>, Alex Williamson <alex@shazbot.org>, "Cédric Le Goater" <clg@redhat.com>, "Philippe Mathieu-Daudé" <philmd@linaro.org>, Peter Xu <peterx@redhat.com>, David Hildenbrand <david@kernel.org>, Peter Maydell <peter.maydell@linaro.org>, Marcelo Tosatti <mtosatti@redhat.com>, Zhao Liu <zhao1.liu@intel.com>, Song Gao <gaosong@loongson.cn>, Huacai Chen <chenhuacai@kernel.org>, Aurelien Jarno <aurelien@aurel32.net>, Jiaxun Yang <jiaxun.yang@flygoat.com>, Aleksandar Rikalo <arikalo@gmail.com>, Nicholas Piggin <npiggin@gmail.com>, Harsh Prateek Bora <harshpb@linux.ibm.com>, Chinmay Rath <rathc@linux.ibm.com>, Palmer Dabbelt <palmer@dabbelt.com>, Alistair Francis <alistair.francis@wdc.com>, Weiwei Li <liwei1518@gmail.com>, Daniel Henrique Barboza <dbarboza@ventanamicro.com>, Liu Zhiwei <zhiwei_liu@linux.alibaba.com>, Halil Pasic <pasic@linux.ibm.com>, Christian Borntraeger <borntraeger@linux.ibm.com>, Eric Farman <farman@linux.ibm.com>, Matthew Rosato <mjrosato@linux.ibm.com>, Ilya Leoshkevich <iii@linux.ibm.com>, Thomas Huth <thuth@redhat.com>

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[PATCH v1 05/28] accel/kvm: mark guest state as unprotected after vm file descriptor change

Posted by Ani Sinha 1 day, 15 hours ago

When the KVM VM file descriptor has changed and a new one created, the guest
state is no longer in protected state. Mark it as such.
The guest state becomes protected again when TDX and SEV-ES and SEV-SNP mark
it as such.

Signed-off-by: Ani Sinha <anisinha@redhat.com>
---
 accel/kvm/kvm-all.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index c9564bf681..abdf91c0de 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -2640,6 +2640,9 @@ static int kvm_reset_vmfd(MachineState *ms)
 
     s->vmfd = ret;
 
+    /* guest state is now unprotected again */
+    kvm_state->guest_state_protected = false;
+
     kvm_setup_dirty_ring(s);
 
     /* rebind memory to new vm fd */
-- 
2.42.0