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i386/sev: Add the SNP launch start context

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The SNP_LAUNCH_START is called first to create a cryptographic launch
context within the firmware.

Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Michael Roth <michael.roth@amd.com>
Co-developed-by: Pankaj Gupta <pankaj.gupta@amd.com>
Signed-off-by: Pankaj Gupta <pankaj.gupta@amd.com>
Message-ID: <20240530111643.1091816-16-pankaj.gupta@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Brijesh Singh 2024-05-30 06:16:27 -05:00 committed by Paolo Bonzini
parent 59d3740cb4
commit d3107f882e
2 changed files with 40 additions and 0 deletions
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39
target/i386/sev.c
View file

@ -39,6 +39,7 @@
#include "confidential-guest.h"
#include "hw/i386/pc.h"
#include "exec/address-spaces.h"
#include "qemu/queue.h"
OBJECT_DECLARE_TYPE(SevCommonState, SevCommonStateClass, SEV_COMMON)
OBJECT_DECLARE_TYPE(SevGuestState, SevCommonStateClass, SEV_GUEST)
@ -115,6 +116,16 @@ struct SevSnpGuestState {
#define DEFAULT_SEV_DEVICE "/dev/sev"
#define DEFAULT_SEV_SNP_POLICY 0x30000
typedef struct SevLaunchUpdateData {
QTAILQ_ENTRY(SevLaunchUpdateData) next;
hwaddr gpa;
void *hva;
uint64_t len;
int type;
} SevLaunchUpdateData;
static QTAILQ_HEAD(, SevLaunchUpdateData) launch_update;
#define SEV_INFO_BLOCK_GUID "00f771de-1a7e-4fcb-890e-68c77e2fb44e"
typedef struct __attribute__((__packed__)) SevInfoBlock {
/* SEV-ES Reset Vector Address */
@ -674,6 +685,31 @@ sev_read_file_base64(const char *filename, guchar **data, gsize *len)
return 0;
}
static int
sev_snp_launch_start(SevCommonState *sev_common)
{
int fw_error, rc;
SevSnpGuestState *sev_snp_guest = SEV_SNP_GUEST(sev_common);
struct kvm_sev_snp_launch_start *start = &sev_snp_guest->kvm_start_conf;
trace_kvm_sev_snp_launch_start(start->policy,
sev_snp_guest->guest_visible_workarounds);
rc = sev_ioctl(sev_common->sev_fd, KVM_SEV_SNP_LAUNCH_START,
start, &fw_error);
if (rc < 0) {
error_report("%s: SNP_LAUNCH_START ret=%d fw_error=%d '%s'",
__func__, rc, fw_error, fw_error_to_str(fw_error));
return 1;
}
QTAILQ_INIT(&launch_update);
sev_set_guest_state(sev_common, SEV_STATE_LAUNCH_UPDATE);
return 0;
}
static int
sev_launch_start(SevCommonState *sev_common)
{
@ -1003,6 +1039,7 @@ static int sev_common_kvm_init(ConfidentialGuestSupport *cgs, Error **errp)
}
ret = klass->launch_start(sev_common);
if (ret) {
error_setg(errp, "%s: failed to create encryption context", __func__);
return -1;
@ -1794,9 +1831,11 @@ sev_snp_guest_class_init(ObjectClass *oc, void *data)
SevCommonStateClass *klass = SEV_COMMON_CLASS(oc);
X86ConfidentialGuestClass *x86_klass = X86_CONFIDENTIAL_GUEST_CLASS(oc);
klass->launch_start = sev_snp_launch_start;
klass->kvm_init = sev_snp_kvm_init;
x86_klass->kvm_type = sev_snp_kvm_type;
object_class_property_add(oc, "policy", "uint64",
sev_snp_guest_get_policy,
sev_snp_guest_set_policy, NULL, NULL);

1
target/i386/trace-events
View file

@ -11,3 +11,4 @@ kvm_sev_launch_measurement(const char *value) "data %s"
kvm_sev_launch_finish(void) ""
kvm_sev_launch_secret(uint64_t hpa, uint64_t hva, uint64_t secret, int len) "hpa 0x%" PRIx64 " hva 0x%" PRIx64 " data 0x%" PRIx64 " len %d"
kvm_sev_attestation_report(const char *mnonce, const char *data) "mnonce %s data %s"
kvm_sev_snp_launch_start(uint64_t policy, char *gosvw) "policy 0x%" PRIx64 " gosvw %s"