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Message-Id: <20230522161249.800829-1-aleksandr.mikhalitsyn@canonical.com>
Date: Mon, 22 May 2023 18:12:46 +0200
From: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@...onical.com>
To: pbonzini@...hat.com
Cc: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@...onical.com>,
Sean Christopherson <seanjc@...gle.com>,
Stéphane Graber <stgraber@...ntu.com>,
kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
"H. Peter Anvin" <hpa@...or.com>
Subject: [PATCH v2 0/2] KVM: SVM: small tweaks for sev_hardware_setup
KVM: SVM: enhance info printk's in SEV init
Let's print available ASID ranges for SEV/SEV-ES guests.
This information can be useful for system administrator
to debug if SEV/SEV-ES fails to enable.
There are a few reasons.
SEV:
- NPT is disabled (module parameter)
- CPU lacks some features (sev, decodeassists)
- Maximum SEV ASID is 0
SEV-ES:
- mmio_caching is disabled (module parameter)
- CPU lacks sev_es feature
- Minimum SEV ASID value is 1 (can be adjusted in BIOS/UEFI)
==
KVM: SVM: free sev_*asid_bitmap init if SEV init fails
If misc_cg_set_capacity() fails for some reason then we have
a memleak for sev_reclaim_asid_bitmap/sev_asid_bitmap. It's
not a case right now, because misc_cg_set_capacity() just can't
fail and check inside it is always successful.
But let's fix that for code consistency.
Cc: Sean Christopherson <seanjc@...gle.com>
Cc: Paolo Bonzini <pbonzini@...hat.com>
Cc: Stéphane Graber <stgraber@...ntu.com>
Cc: kvm@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Signed-off-by: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@...onical.com>
Alexander Mikhalitsyn (2):
KVM: SVM: free sev_*asid_bitmap init if SEV init fails
KVM: SVM: enhance info printk's in SEV init
arch/x86/kvm/svm/sev.c | 16 +++++++++++++---
1 file changed, 13 insertions(+), 3 deletions(-)
--
2.34.1
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