From: Venu Busireddy <venu.busireddy@oracle.com>
To: Ashish Kalra <Ashish.Kalra@amd.com>
Cc: pbonzini@redhat.com, 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,
rientjes@google.com, brijesh.singh@amd.com
Subject: Re: [PATCH v7 01/18] KVM: SVM: Add KVM_SEV SEND_START command
Date: Mon, 4 May 2020 16:07:17 -0500 [thread overview]
Message-ID: <20200504210717.GA1699387@vbusired-dt> (raw)
In-Reply-To: <6473e5803d8c47d9b207810e8015c3066c39f17d.1588234824.git.ashish.kalra@amd.com>
On 2020-04-30 08:40:34 +0000, Ashish Kalra wrote:
> From: Brijesh Singh <Brijesh.Singh@amd.com>
>
> The command is used to create an outgoing SEV guest encryption context.
>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: Ingo Molnar <mingo@redhat.com>
> Cc: "H. Peter Anvin" <hpa@zytor.com>
> Cc: Paolo Bonzini <pbonzini@redhat.com>
> Cc: "Radim Krčmář" <rkrcmar@redhat.com>
> Cc: Joerg Roedel <joro@8bytes.org>
> Cc: Borislav Petkov <bp@suse.de>
> Cc: Tom Lendacky <thomas.lendacky@amd.com>
> Cc: x86@kernel.org
> Cc: kvm@vger.kernel.org
> Cc: linux-kernel@vger.kernel.org
> Reviewed-by: Steve Rutherford <srutherford@google.com>
> Reviewed-by: Venu Busireddy <venu.busireddy@oracle.com>
> Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
> Signed-off-by: Ashish Kalra <ashish.kalra@amd.com>
> ---
> .../virt/kvm/amd-memory-encryption.rst | 27 ++++
> arch/x86/kvm/svm/sev.c | 125 ++++++++++++++++++
> include/linux/psp-sev.h | 8 +-
> include/uapi/linux/kvm.h | 12 ++
> 4 files changed, 168 insertions(+), 4 deletions(-)
>
> diff --git a/Documentation/virt/kvm/amd-memory-encryption.rst b/Documentation/virt/kvm/amd-memory-encryption.rst
> index c3129b9ba5cb..4fd34fc5c7a7 100644
> --- a/Documentation/virt/kvm/amd-memory-encryption.rst
> +++ b/Documentation/virt/kvm/amd-memory-encryption.rst
> @@ -263,6 +263,33 @@ Returns: 0 on success, -negative on error
> __u32 trans_len;
> };
>
> +10. KVM_SEV_SEND_START
> +----------------------
> +
> +The KVM_SEV_SEND_START command can be used by the hypervisor to create an
> +outgoing guest encryption context.
> +
> +Parameters (in): struct kvm_sev_send_start
> +
> +Returns: 0 on success, -negative on error
> +
> +::
> + struct kvm_sev_send_start {
> + __u32 policy; /* guest policy */
> +
> + __u64 pdh_cert_uaddr; /* platform Diffie-Hellman certificate */
> + __u32 pdh_cert_len;
> +
> + __u64 plat_certs_uadr; /* platform certificate chain */
Can this be changed as mentioned in the previous review
(https://lore.kernel.org/kvm/20200402062726.GA647295@vbusired-dt/)?
> + __u32 plat_certs_len;
> +
> + __u64 amd_certs_uaddr; /* AMD certificate */
> + __u32 amd_cert_len;
Can this be changed as mentioned in the previous review
(https://lore.kernel.org/kvm/20200402062726.GA647295@vbusired-dt/)?
> +
> + __u64 session_uaddr; /* Guest session information */
> + __u32 session_len;
> + };
> +
> References
> ==========
>
> diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
> index cf912b4aaba8..5a15b43b4349 100644
> --- a/arch/x86/kvm/svm/sev.c
> +++ b/arch/x86/kvm/svm/sev.c
> @@ -913,6 +913,128 @@ static int sev_launch_secret(struct kvm *kvm, struct kvm_sev_cmd *argp)
> return ret;
> }
>
> +/* Userspace wants to query session length. */
> +static int
> +__sev_send_start_query_session_length(struct kvm *kvm, struct kvm_sev_cmd *argp,
> + struct kvm_sev_send_start *params)
> +{
> + struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
> + struct sev_data_send_start *data;
> + int ret;
> +
> + data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
> + if (data == NULL)
> + return -ENOMEM;
> +
> + data->handle = sev->handle;
> + ret = sev_issue_cmd(kvm, SEV_CMD_SEND_START, data, &argp->error);
> +
> + params->session_len = data->session_len;
> + if (copy_to_user((void __user *)(uintptr_t)argp->data, params,
> + sizeof(struct kvm_sev_send_start)))
> + ret = -EFAULT;
> +
> + kfree(data);
> + return ret;
> +}
> +
> +static int sev_send_start(struct kvm *kvm, struct kvm_sev_cmd *argp)
> +{
> + struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
> + struct sev_data_send_start *data;
> + struct kvm_sev_send_start params;
> + void *amd_certs, *session_data;
> + void *pdh_cert, *plat_certs;
> + int ret;
> +
> + if (!sev_guest(kvm))
> + return -ENOTTY;
> +
> + if (copy_from_user(¶ms, (void __user *)(uintptr_t)argp->data,
> + sizeof(struct kvm_sev_send_start)))
> + return -EFAULT;
> +
> + /* if session_len is zero, userspace wants to query the session length */
> + if (!params.session_len)
> + return __sev_send_start_query_session_length(kvm, argp,
> + ¶ms);
> +
> + /* some sanity checks */
> + if (!params.pdh_cert_uaddr || !params.pdh_cert_len ||
> + !params.session_uaddr || params.session_len > SEV_FW_BLOB_MAX_SIZE)
> + return -EINVAL;
> +
> + /* allocate the memory to hold the session data blob */
> + session_data = kmalloc(params.session_len, GFP_KERNEL_ACCOUNT);
> + if (!session_data)
> + return -ENOMEM;
> +
> + /* copy the certificate blobs from userspace */
> + pdh_cert = psp_copy_user_blob(params.pdh_cert_uaddr,
> + params.pdh_cert_len);
> + if (IS_ERR(pdh_cert)) {
> + ret = PTR_ERR(pdh_cert);
> + goto e_free_session;
> + }
> +
> + plat_certs = psp_copy_user_blob(params.plat_certs_uaddr,
> + params.plat_certs_len);
> + if (IS_ERR(plat_certs)) {
> + ret = PTR_ERR(plat_certs);
> + goto e_free_pdh;
> + }
> +
> + amd_certs = psp_copy_user_blob(params.amd_certs_uaddr,
> + params.amd_certs_len);
> + if (IS_ERR(amd_certs)) {
> + ret = PTR_ERR(amd_certs);
> + goto e_free_plat_cert;
> + }
> +
> + data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
> + if (data == NULL) {
> + ret = -ENOMEM;
> + goto e_free_amd_cert;
> + }
> +
> + /* populate the FW SEND_START field with system physical address */
> + data->pdh_cert_address = __psp_pa(pdh_cert);
> + data->pdh_cert_len = params.pdh_cert_len;
> + data->plat_certs_address = __psp_pa(plat_certs);
> + data->plat_certs_len = params.plat_certs_len;
> + data->amd_certs_address = __psp_pa(amd_certs);
> + data->amd_certs_len = params.amd_certs_len;
> + data->session_address = __psp_pa(session_data);
> + data->session_len = params.session_len;
> + data->handle = sev->handle;
> +
Can the following code be changed as acknowledged in
https://lore.kernel.org/kvm/f715bf99-0158-4d5f-77f3-b27743db3c59@amd.com/?
> + ret = sev_issue_cmd(kvm, SEV_CMD_SEND_START, data, &argp->error);
> +
> + if (!ret && copy_to_user((void __user *)(uintptr_t)params.session_uaddr,
> + session_data, params.session_len)) {
> + ret = -EFAULT;
> + goto e_free;
> + }
> +
> + params.policy = data->policy;
> + params.session_len = data->session_len;
> + if (copy_to_user((void __user *)(uintptr_t)argp->data, ¶ms,
> + sizeof(struct kvm_sev_send_start)))
> + ret = -EFAULT;
> +
> +e_free:
> + kfree(data);
> +e_free_amd_cert:
> + kfree(amd_certs);
> +e_free_plat_cert:
> + kfree(plat_certs);
> +e_free_pdh:
> + kfree(pdh_cert);
> +e_free_session:
> + kfree(session_data);
> + return ret;
> +}
> +
> int svm_mem_enc_op(struct kvm *kvm, void __user *argp)
> {
> struct kvm_sev_cmd sev_cmd;
> @@ -957,6 +1079,9 @@ int svm_mem_enc_op(struct kvm *kvm, void __user *argp)
> case KVM_SEV_LAUNCH_SECRET:
> r = sev_launch_secret(kvm, &sev_cmd);
> break;
> + case KVM_SEV_SEND_START:
> + r = sev_send_start(kvm, &sev_cmd);
> + break;
> default:
> r = -EINVAL;
> goto out;
> diff --git a/include/linux/psp-sev.h b/include/linux/psp-sev.h
> index 5167bf2bfc75..9f63b9d48b63 100644
> --- a/include/linux/psp-sev.h
> +++ b/include/linux/psp-sev.h
> @@ -323,11 +323,11 @@ struct sev_data_send_start {
> u64 pdh_cert_address; /* In */
> u32 pdh_cert_len; /* In */
> u32 reserved1;
> - u64 plat_cert_address; /* In */
> - u32 plat_cert_len; /* In */
> + u64 plat_certs_address; /* In */
> + u32 plat_certs_len; /* In */
> u32 reserved2;
> - u64 amd_cert_address; /* In */
> - u32 amd_cert_len; /* In */
> + u64 amd_certs_address; /* In */
> + u32 amd_certs_len; /* In */
> u32 reserved3;
> u64 session_address; /* In */
> u32 session_len; /* In/Out */
> diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
> index 428c7dde6b4b..8827d43e2684 100644
> --- a/include/uapi/linux/kvm.h
> +++ b/include/uapi/linux/kvm.h
> @@ -1598,6 +1598,18 @@ struct kvm_sev_dbg {
> __u32 len;
> };
>
> +struct kvm_sev_send_start {
> + __u32 policy;
> + __u64 pdh_cert_uaddr;
> + __u32 pdh_cert_len;
> + __u64 plat_certs_uaddr;
> + __u32 plat_certs_len;
> + __u64 amd_certs_uaddr;
> + __u32 amd_certs_len;
> + __u64 session_uaddr;
> + __u32 session_len;
> +};
> +
> #define KVM_DEV_ASSIGN_ENABLE_IOMMU (1 << 0)
> #define KVM_DEV_ASSIGN_PCI_2_3 (1 << 1)
> #define KVM_DEV_ASSIGN_MASK_INTX (1 << 2)
> --
> 2.17.1
>
next prev parent reply other threads:[~2020-05-04 21:10 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-30 8:39 [PATCH v7 00/18] Add AMD SEV guest live migration support Ashish Kalra
2020-04-30 8:40 ` [PATCH v7 01/18] KVM: SVM: Add KVM_SEV SEND_START command Ashish Kalra
2020-05-04 21:07 ` Venu Busireddy [this message]
2020-05-04 22:36 ` Ashish Kalra
2020-05-04 23:10 ` Venu Busireddy
2020-05-04 23:37 ` Ashish Kalra
2020-04-30 8:40 ` [PATCH v7 02/18] KVM: SVM: Add KVM_SEND_UPDATE_DATA command Ashish Kalra
2020-05-04 21:13 ` Venu Busireddy
2020-04-30 8:41 ` [PATCH v7 03/18] KVM: SVM: Add KVM_SEV_SEND_FINISH command Ashish Kalra
2020-05-04 21:21 ` Venu Busireddy
2020-04-30 8:42 ` [PATCH v7 04/18] KVM: SVM: Add support for KVM_SEV_RECEIVE_START command Ashish Kalra
2020-05-04 21:37 ` Venu Busireddy
2020-04-30 8:42 ` [PATCH v7 05/18] KVM: SVM: Add KVM_SEV_RECEIVE_UPDATE_DATA command Ashish Kalra
2020-04-30 8:42 ` [PATCH v7 06/18] KVM: SVM: Add KVM_SEV_RECEIVE_FINISH command Ashish Kalra
2020-05-04 21:41 ` Venu Busireddy
2020-04-30 8:42 ` [PATCH v7 07/18] KVM: x86: Add AMD SEV specific Hypercall3 Ashish Kalra
2020-04-30 8:43 ` [PATCH v7 08/18] KVM: X86: Introduce KVM_HC_PAGE_ENC_STATUS hypercall Ashish Kalra
2020-04-30 8:43 ` [PATCH v7 09/18] KVM: x86: Introduce KVM_GET_PAGE_ENC_BITMAP ioctl Ashish Kalra
2020-05-04 21:52 ` Venu Busireddy
2020-04-30 8:43 ` [PATCH v7 10/18] x86/paravirt: Add hypervisor specific hypercall for SEV live migration Ashish Kalra
2020-05-01 11:00 ` kbuild test robot
2020-05-01 11:00 ` [RFC PATCH] x86/paravirt: kvm_sev_migration_hcall() can be static kbuild test robot
2020-04-30 8:45 ` [PATCH v7 11/18] mm: x86: Invoke hypercall when page encryption status is changed Ashish Kalra
2020-04-30 9:49 ` Jürgen Groß
2020-04-30 15:21 ` Brijesh Singh
2020-04-30 15:37 ` Jürgen Groß
2020-04-30 8:45 ` [PATCH v7 12/18] KVM: x86: Introduce KVM_SET_PAGE_ENC_BITMAP ioctl Ashish Kalra
2020-04-30 8:45 ` [PATCH v7 13/18] KVM: SVM: Add support for static allocation of unified Page Encryption Bitmap Ashish Kalra
2020-04-30 8:46 ` [PATCH v7 14/18] KVM: x86: Introduce new KVM_FEATURE_SEV_LIVE_MIGRATION feature & Custom MSR Ashish Kalra
2020-04-30 8:46 ` [PATCH v7 15/18] EFI: Introduce the new AMD Memory Encryption GUID Ashish Kalra
2020-04-30 8:46 ` [PATCH v7 16/18] KVM: x86: Add guest support for detecting and enabling SEV Live Migration feature Ashish Kalra
2020-04-30 16:42 ` kbuild test robot
2020-04-30 8:47 ` [PATCH v7 17/18] KVM: x86: Mark _bss_decrypted section variables as decrypted in page encryption bitmap Ashish Kalra
2020-04-30 8:48 ` [PATCH v7 18/18] KVM: x86: Add kexec support for SEV Live Migration Ashish Kalra
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200504210717.GA1699387@vbusired-dt \
--to=venu.busireddy@oracle.com \
--cc=Ashish.Kalra@amd.com \
--cc=bp@suse.de \
--cc=brijesh.singh@amd.com \
--cc=hpa@zytor.com \
--cc=joro@8bytes.org \
--cc=kvm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@redhat.com \
--cc=pbonzini@redhat.com \
--cc=rientjes@google.com \
--cc=srutherford@google.com \
--cc=tglx@linutronix.de \
--cc=thomas.lendacky@amd.com \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).