From: Ashish Kalra <Ashish.Kalra@amd.com>
To: pbonzini@redhat.com
Cc: tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com,
joro@8bytes.org, bp@suse.de, thomas.lendacky@amd.com,
x86@kernel.org, kvm@vger.kernel.org,
linux-kernel@vger.kernel.org, srutherford@google.com,
brijesh.singh@amd.com, dovmurik@linux.vnet.ibm.com,
tobin@ibm.com, jejb@linux.ibm.com, frankeh@us.ibm.com,
dgilbert@redhat.com
Subject: [PATCH v2 0/9] Add AMD SEV page encryption bitmap support.
Date: Tue, 1 Dec 2020 00:45:16 +0000 [thread overview]
Message-ID: <cover.1606782580.git.ashish.kalra@amd.com> (raw)
From: Ashish Kalra <ashish.kalra@amd.com>
The series add support for AMD SEV page encryption bitmap.
SEV guest VMs have the concept of private and shared memory. Private memory
is encrypted with the guest-specific key, while shared memory may be encrypted
with hypervisor key. The patch series introduces a new hypercall.
The guest OS can use this hypercall to notify the page encryption status.
The patch adds new ioctls KVM_{SET,GET}_PAGE_ENC_BITMAP. The ioctl can be used
by qemu to get the page encryption bitmap. Qemu can consult this bitmap
during guest live migration / page migration and/or guest debugging to know
whether the page is encrypted.
The page encryption bitmap support is required for SEV guest live migration,
guest page migration and guest debugging.
The patch-set also adds support for bypassing unencrypted guest memory
regions for DBG_DECRYPT API calls, guest memory region encryption status
in sev_dbg_decrypt() is now referenced using the page encryption bitmap.
A branch containing these patches is available here:
https://github.com/AMDESE/linux/tree/sev-page-encryption-bitmap-v2
Changes since v1:
- Fix in sev_dbg_crypt() to release RCU read lock if hva_to_gfn() fails
when bypassing DBG_DECRYPT API calls for unencrypted guest memory.
- Comment fix for Patch 7/9.
Ashish Kalra (4):
KVM: SVM: Add support for static allocation of unified Page Encryption
Bitmap.
KVM: x86: Mark _bss_decrypted section variables as decrypted in page
encryption bitmap.
KVM: x86: Add kexec support for SEV page encryption bitmap.
KVM: SVM: Bypass DBG_DECRYPT API calls for unecrypted guest memory.
Brijesh Singh (5):
KVM: x86: Add AMD SEV specific Hypercall3
KVM: X86: Introduce KVM_HC_PAGE_ENC_STATUS hypercall
KVM: x86: Introduce KVM_GET_PAGE_ENC_BITMAP ioctl
mm: x86: Invoke hypercall when page encryption status is changed.
KVM: x86: Introduce KVM_SET_PAGE_ENC_BITMAP ioctl
Documentation/virt/kvm/api.rst | 71 ++++++
Documentation/virt/kvm/hypercalls.rst | 15 ++
arch/x86/include/asm/kvm_host.h | 7 +
arch/x86/include/asm/kvm_para.h | 12 +
arch/x86/include/asm/mem_encrypt.h | 4 +
arch/x86/include/asm/paravirt.h | 10 +
arch/x86/include/asm/paravirt_types.h | 2 +
arch/x86/kernel/kvm.c | 28 +++
arch/x86/kernel/kvmclock.c | 12 +
arch/x86/kernel/paravirt.c | 1 +
arch/x86/kvm/svm/sev.c | 321 ++++++++++++++++++++++++++
arch/x86/kvm/svm/svm.c | 5 +
arch/x86/kvm/svm/svm.h | 7 +
arch/x86/kvm/vmx/vmx.c | 1 +
arch/x86/kvm/x86.c | 35 +++
arch/x86/mm/mem_encrypt.c | 63 ++++-
arch/x86/mm/pat/set_memory.c | 7 +
include/uapi/linux/kvm.h | 13 ++
include/uapi/linux/kvm_para.h | 1 +
19 files changed, 614 insertions(+), 1 deletion(-)
--
2.17.1
next reply other threads:[~2020-12-01 0:46 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-01 0:45 Ashish Kalra [this message]
2020-12-01 0:45 ` [PATCH v2 1/9] KVM: x86: Add AMD SEV specific Hypercall3 Ashish Kalra
2020-12-03 0:34 ` Sean Christopherson
2020-12-04 17:16 ` Brijesh Singh
2020-12-06 10:26 ` Paolo Bonzini
2020-12-07 20:41 ` Sean Christopherson
2020-12-08 3:09 ` Steve Rutherford
2020-12-08 4:16 ` Kalra, Ashish
2020-12-08 16:29 ` Brijesh Singh
2020-12-11 22:55 ` Ashish Kalra
2020-12-12 4:56 ` Ashish Kalra
2020-12-18 19:39 ` Dr. David Alan Gilbert
[not found] ` <E79E09A2-F314-4B59-B7AE-07B1D422DF2B@amd.com>
2020-12-18 19:56 ` Dr. David Alan Gilbert
2021-01-06 23:05 ` Ashish Kalra
2021-01-07 1:01 ` Steve Rutherford
2021-01-07 1:34 ` Ashish Kalra
2021-01-07 8:05 ` Ashish Kalra
2021-01-08 0:47 ` Ashish Kalra
2021-01-08 0:55 ` Steve Rutherford
2021-01-07 17:07 ` Ashish Kalra
2021-01-07 17:26 ` Sean Christopherson
2021-01-07 18:41 ` Ashish Kalra
2021-01-07 19:22 ` Sean Christopherson
2021-01-08 0:54 ` Steve Rutherford
2021-01-08 16:56 ` Sean Christopherson
2020-12-01 0:46 ` [PATCH v2 2/9] KVM: X86: Introduce KVM_HC_PAGE_ENC_STATUS hypercall Ashish Kalra
2020-12-02 16:54 ` Dr. David Alan Gilbert
2020-12-02 21:22 ` Ashish Kalra
2020-12-06 10:25 ` Paolo Bonzini
2020-12-01 0:47 ` [PATCH v2 3/9] KVM: x86: Introduce KVM_GET_PAGE_ENC_BITMAP ioctl Ashish Kalra
2020-12-06 11:02 ` Dov Murik
2020-12-07 22:00 ` Ashish Kalra
2020-12-01 0:47 ` [PATCH v2 4/9] mm: x86: Invoke hypercall when page encryption status is changed Ashish Kalra
2020-12-01 0:47 ` [PATCH v2 5/9] KVM: x86: Introduce KVM_SET_PAGE_ENC_BITMAP ioctl Ashish Kalra
2020-12-01 0:47 ` [PATCH v2 6/9] KVM: SVM: Add support for static allocation of unified Page Encryption Bitmap Ashish Kalra
2020-12-01 0:48 ` [PATCH v2 7/9] KVM: x86: Mark _bss_decrypted section variables as decrypted in page encryption bitmap Ashish Kalra
2020-12-01 0:48 ` [PATCH v2 8/9] KVM: x86: Add kexec support for SEV " Ashish Kalra
2020-12-01 0:48 ` [PATCH v2 9/9] KVM: SVM: Bypass DBG_DECRYPT API calls for unecrypted guest memory Ashish Kalra
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