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Tue, 6 Aug 2019 16:54:52 +0000 From: "Singh, Brijesh" To: "qemu-devel@nongnu.org" Thread-Topic: [PATCH v3 07/14] target/i386: sev: provide callback to setup outgoing context Thread-Index: AQHVTHeqAFYxQ7DhSEOaBG3TErDUzw== Date: Tue, 6 Aug 2019 16:54:52 +0000 Message-ID: <20190806165429.19327-8-brijesh.singh@amd.com> References: <20190806165429.19327-1-brijesh.singh@amd.com> In-Reply-To: <20190806165429.19327-1-brijesh.singh@amd.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: SN4PR0701CA0027.namprd07.prod.outlook.com (2603:10b6:803:2d::13) To DM6PR12MB2682.namprd12.prod.outlook.com (2603:10b6:5:42::13) authentication-results: spf=none (sender IP is ) smtp.mailfrom=brijesh.singh@amd.com; x-ms-exchange-messagesentrepresentingtype: 1 x-mailer: git-send-email 2.17.1 x-originating-ip: [165.204.77.1] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 99c15282-3b08-40cb-9b8a-08d71a8eccb6 x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0; 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H:DM6PR12MB2682.namprd12.prod.outlook.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; A:1; MX:1; received-spf: None (protection.outlook.com: amd.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: mU5xV0CSKlKUa6RoJLW9KEBdN8wttYkWlHTT7cFpuQ8Pui6AQHPscSn3lJtSUAlJpMuzRhDB26yADFM4D9I4mhahFF+6WB5AOdDmh1dgKXoL9k0+cLYuFitKy3oJZNfvZ140dA0Y4vfbxAHsv4DvtqFh19ADsznAqeUXm5L2FDrd7r1t8uPu03CfMjOzvlAPbGcAGxzSUPMqhX3cNuGb1NK4aB+XFL0imOcyYZQZ65YyvKy/CxSlRXxKiEe+oS5JfhtvOF75rS33WmOw2KnLNLqc+GAXUnufa/Ih8KHPBWqTaHrfMpxT9kNUWeiQgUGVBgSO7fNdPyjwAn4uZAQKPntS4xAPegjgLMoBDK5tUEG9lwiZDcCJu5QK50CnCLi8y1I6sIYVPuMRBtyS/jZqhcm1ZeefL0GLvrMCf9X1UBo= Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: 99c15282-3b08-40cb-9b8a-08d71a8eccb6 X-MS-Exchange-CrossTenant-originalarrivaltime: 06 Aug 2019 16:54:52.1580 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: sbrijesh@amd.com X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB4233 X-detected-operating-system: by eggs.gnu.org: Windows 7 or 8 [fuzzy] X-Received-From: 40.107.71.55 Subject: [Qemu-devel] [PATCH v3 07/14] target/i386: sev: provide callback to setup outgoing context X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "pbonzini@redhat.com" , "Lendacky, Thomas" , "Singh, Brijesh" , "dgilbert@redhat.com" , "ehabkost@redhat.com" Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" The user provides the target machine's Platform Diffie-Hellman key (PDH) and certificate chain before starting the SEV guest migration. Cache the certificate chain as we need them while creating the outgoing context. Signed-off-by: Brijesh Singh --- accel/kvm/kvm-all.c | 12 +++++++++++ accel/kvm/sev-stub.c | 6 ++++++ include/sysemu/sev.h | 2 ++ target/i386/sev.c | 45 ++++++++++++++++++++++++++++++++++++++++++ target/i386/sev_i386.h | 6 ++++++ 5 files changed, 71 insertions(+) diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c index f450f25295..d0304c6947 100644 --- a/accel/kvm/kvm-all.c +++ b/accel/kvm/kvm-all.c @@ -165,6 +165,17 @@ bool kvm_memcrypt_enabled(void) return false; } =20 +static int kvm_memcrypt_save_setup(const char *pdh, const char *plat_cert, + const char *amd_cert) +{ + return sev_save_setup(kvm_state->memcrypt_handle, pdh, + plat_cert, amd_cert); +} + +static struct MachineMemoryEncryptionOps sev_memory_encryption_ops =3D { + .save_setup =3D kvm_memcrypt_save_setup, +}; + int kvm_memcrypt_encrypt_data(uint8_t *ptr, uint64_t len) { if (kvm_state->memcrypt_handle && @@ -1968,6 +1979,7 @@ static int kvm_init(MachineState *ms) } =20 kvm_state->memcrypt_encrypt_data =3D sev_encrypt_data; + mc->memory_encryption_ops =3D &sev_memory_encryption_ops; } =20 ret =3D kvm_arch_init(ms, s); diff --git a/accel/kvm/sev-stub.c b/accel/kvm/sev-stub.c index 4f97452585..528f8cf7f1 100644 --- a/accel/kvm/sev-stub.c +++ b/accel/kvm/sev-stub.c @@ -24,3 +24,9 @@ void *sev_guest_init(const char *id) { return NULL; } + +int sev_save_setup(void *handle, const char *pdh, const char *plat_cert, + const char *amd_cert) +{ + return 1; +} diff --git a/include/sysemu/sev.h b/include/sysemu/sev.h index 98c1ec8d38..d5123d4fa3 100644 --- a/include/sysemu/sev.h +++ b/include/sysemu/sev.h @@ -18,4 +18,6 @@ =20 void *sev_guest_init(const char *id); int sev_encrypt_data(void *handle, uint8_t *ptr, uint64_t len); +int sev_save_setup(void *handle, const char *pdh, const char *plat_cert, + const char *amd_cert); #endif diff --git a/target/i386/sev.c b/target/i386/sev.c index f1423cb0c0..70e9d86815 100644 --- a/target/i386/sev.c +++ b/target/i386/sev.c @@ -27,6 +27,7 @@ #include "sysemu/sysemu.h" #include "trace.h" #include "migration/blocker.h" +#include "migration/qemu-file.h" =20 #define DEFAULT_GUEST_POLICY 0x1 /* disable debug */ #define DEFAULT_SEV_DEVICE "/dev/sev" @@ -62,6 +63,8 @@ static const char *const sev_fw_errlist[] =3D { =20 #define SEV_FW_MAX_ERROR ARRAY_SIZE(sev_fw_errlist) =20 +#define SEV_FW_BLOB_MAX_SIZE 0x4000 /* 16KB */ + static int sev_ioctl(int fd, int cmd, void *data, int *error) { @@ -729,6 +732,48 @@ sev_vm_state_change(void *opaque, int running, RunStat= e state) } } =20 +static inline bool check_blob_length(size_t value) +{ + if (value > SEV_FW_BLOB_MAX_SIZE) { + error_report("invalid length max=3D%ld got=3D%d", + value, SEV_FW_BLOB_MAX_SIZE); + return false; + } + + return true; +} + +int sev_save_setup(void *handle, const char *pdh, const char *plat_cert, + const char *amd_cert) +{ + SEVState *s =3D (SEVState *)handle; + + s->remote_pdh =3D g_base64_decode(pdh, &s->remote_pdh_len); + if (!check_blob_length(s->remote_pdh_len)) { + goto error; + } + + s->remote_plat_cert =3D g_base64_decode(plat_cert, + &s->remote_plat_cert_len); + if (!check_blob_length(s->remote_plat_cert_len)) { + goto error; + } + + s->amd_cert =3D g_base64_decode(amd_cert, &s->amd_cert_len); + if (!check_blob_length(s->amd_cert_len)) { + goto error; + } + + return 0; + +error: + g_free(s->remote_pdh); + g_free(s->remote_plat_cert); + g_free(s->amd_cert); + + return 1; +} + void * sev_guest_init(const char *id) { diff --git a/target/i386/sev_i386.h b/target/i386/sev_i386.h index 55313441ae..32906de998 100644 --- a/target/i386/sev_i386.h +++ b/target/i386/sev_i386.h @@ -81,6 +81,12 @@ struct SEVState { int sev_fd; SevState state; gchar *measurement; + guchar *remote_pdh; + size_t remote_pdh_len; + guchar *remote_plat_cert; + size_t remote_plat_cert_len; + guchar *amd_cert; + size_t amd_cert_len; }; =20 typedef struct SEVState SEVState; --=20 2.17.1