* Tobin Feldman-Fitzthum (to...@linux.ibm.com) wrote: > On 2020-09-21 15:16, Dr. David Alan Gilbert wrote: > > * Tobin Feldman-Fitzthum (to...@linux.vnet.ibm.com) wrote: > > > AMD SEV allows a guest owner to inject a secret blob > > > into the memory of a virtual machine. The secret is > > > encrypted with the SEV Transport Encryption Key and > > > integrity is guaranteed with the Transport Integrity > > > Key. Although QEMU faciliates the injection of the > > > launch secret, it cannot access the secret. > > > > > > Signed-off-by: Tobin Feldman-Fitzthum <to...@linux.vnet.ibm.com> > > > > Hi Tobin, > > Did the ovmf stuff for agreeing the GUID for automating this ever > > happen? > > > OVMF patches have not been upstreamed yet. I think we are planning > to do that relatively soon.
So as we're getting to the end of another qemu dev cycle; do we aim to get this one in by itself, or to wait for the GUID? Dave > -Tobin > > Dave > > > > > --- > > > include/monitor/monitor.h | 3 ++ > > > include/sysemu/sev.h | 2 ++ > > > monitor/misc.c | 8 ++--- > > > qapi/misc-target.json | 18 +++++++++++ > > > target/i386/monitor.c | 9 ++++++ > > > target/i386/sev-stub.c | 5 +++ > > > target/i386/sev.c | 66 > > > +++++++++++++++++++++++++++++++++++++++ > > > target/i386/trace-events | 1 + > > > 8 files changed, 108 insertions(+), 4 deletions(-) > > > > > > diff --git a/include/monitor/monitor.h b/include/monitor/monitor.h > > > index 1018d754a6..bf049c5b00 100644 > > > --- a/include/monitor/monitor.h > > > +++ b/include/monitor/monitor.h > > > @@ -4,6 +4,7 @@ > > > #include "block/block.h" > > > #include "qapi/qapi-types-misc.h" > > > #include "qemu/readline.h" > > > +#include "include/exec/hwaddr.h" > > > > > > extern __thread Monitor *cur_mon; > > > typedef struct MonitorHMP MonitorHMP; > > > @@ -36,6 +37,8 @@ void monitor_flush(Monitor *mon); > > > int monitor_set_cpu(int cpu_index); > > > int monitor_get_cpu_index(void); > > > > > > +void *gpa2hva(MemoryRegion **p_mr, hwaddr addr, uint64_t size, > > > Error **errp); > > > + > > > void monitor_read_command(MonitorHMP *mon, int show_prompt); > > > int monitor_read_password(MonitorHMP *mon, ReadLineFunc > > > *readline_func, > > > void *opaque); > > > diff --git a/include/sysemu/sev.h b/include/sysemu/sev.h > > > index 98c1ec8d38..b279b293e8 100644 > > > --- a/include/sysemu/sev.h > > > +++ b/include/sysemu/sev.h > > > @@ -18,4 +18,6 @@ > > > > > > void *sev_guest_init(const char *id); > > > int sev_encrypt_data(void *handle, uint8_t *ptr, uint64_t len); > > > +int sev_inject_launch_secret(const char *hdr, const char *secret, > > > + uint64_t gpa); > > > #endif > > > diff --git a/monitor/misc.c b/monitor/misc.c > > > index 89bb970b00..b9ec8ba410 100644 > > > --- a/monitor/misc.c > > > +++ b/monitor/misc.c > > > @@ -674,10 +674,10 @@ static void hmp_physical_memory_dump(Monitor > > > *mon, const QDict *qdict) > > > memory_dump(mon, count, format, size, addr, 1); > > > } > > > > > > -static void *gpa2hva(MemoryRegion **p_mr, hwaddr addr, Error **errp) > > > +void *gpa2hva(MemoryRegion **p_mr, hwaddr addr, uint64_t size, > > > Error **errp) > > > { > > > MemoryRegionSection mrs = memory_region_find(get_system_memory(), > > > - addr, 1); > > > + addr, size); > > > > > > if (!mrs.mr) { > > > error_setg(errp, "No memory is mapped at address 0x%" > > > HWADDR_PRIx, addr); > > > @@ -701,7 +701,7 @@ static void hmp_gpa2hva(Monitor *mon, const > > > QDict *qdict) > > > MemoryRegion *mr = NULL; > > > void *ptr; > > > > > > - ptr = gpa2hva(&mr, addr, &local_err); > > > + ptr = gpa2hva(&mr, addr, 1, &local_err); > > > if (local_err) { > > > error_report_err(local_err); > > > return; > > > @@ -777,7 +777,7 @@ static void hmp_gpa2hpa(Monitor *mon, const > > > QDict *qdict) > > > void *ptr; > > > uint64_t physaddr; > > > > > > - ptr = gpa2hva(&mr, addr, &local_err); > > > + ptr = gpa2hva(&mr, addr, 1, &local_err); > > > if (local_err) { > > > error_report_err(local_err); > > > return; > > > diff --git a/qapi/misc-target.json b/qapi/misc-target.json > > > index dee3b45930..d145f916b3 100644 > > > --- a/qapi/misc-target.json > > > +++ b/qapi/misc-target.json > > > @@ -200,6 +200,24 @@ > > > { 'command': 'query-sev-capabilities', 'returns': 'SevCapability', > > > 'if': 'defined(TARGET_I386)' } > > > > > > +## > > > +# @sev-inject-launch-secret: > > > +# > > > +# This command injects a secret blob into memory of SEV guest. > > > +# > > > +# @packet-header: the launch secret packet header encoded in base64 > > > +# > > > +# @secret: the launch secret data to be injected encoded in base64 > > > +# > > > +# @gpa: the guest physical address where secret will be injected. > > > +# > > > +# Since: 5.1 > > > +# > > > +## > > > +{ 'command': 'sev-inject-launch-secret', > > > + 'data': { 'packet-header': 'str', 'secret': 'str', 'gpa': > > > 'uint64' }, > > > + 'if': 'defined(TARGET_I386)' } > > > + > > > ## > > > # @dump-skeys: > > > # > > > diff --git a/target/i386/monitor.c b/target/i386/monitor.c > > > index 27ebfa3ad2..42bcfe6dc0 100644 > > > --- a/target/i386/monitor.c > > > +++ b/target/i386/monitor.c > > > @@ -736,3 +736,12 @@ SevCapability *qmp_query_sev_capabilities(Error > > > **errp) > > > > > > return data; > > > } > > > + > > > +void qmp_sev_inject_launch_secret(const char *packet_hdr, > > > + const char *secret, uint64_t gpa, > > > + Error **errp) > > > +{ > > > + if (sev_inject_launch_secret(packet_hdr, secret, gpa) != 0) { > > > + error_setg(errp, "SEV inject secret failed"); > > > + } > > > +} > > > diff --git a/target/i386/sev-stub.c b/target/i386/sev-stub.c > > > index e5ee13309c..fed4588185 100644 > > > --- a/target/i386/sev-stub.c > > > +++ b/target/i386/sev-stub.c > > > @@ -48,3 +48,8 @@ SevCapability *sev_get_capabilities(void) > > > { > > > return NULL; > > > } > > > +int sev_inject_launch_secret(const char *hdr, const char *secret, > > > + uint64_t gpa) > > > +{ > > > + return 1; > > > +} > > > diff --git a/target/i386/sev.c b/target/i386/sev.c > > > index d273174ad3..cbeb8f2e02 100644 > > > --- a/target/i386/sev.c > > > +++ b/target/i386/sev.c > > > @@ -28,6 +28,8 @@ > > > #include "sysemu/runstate.h" > > > #include "trace.h" > > > #include "migration/blocker.h" > > > +#include "exec/address-spaces.h" > > > +#include "monitor/monitor.h" > > > > > > #define TYPE_SEV_GUEST "sev-guest" > > > #define SEV_GUEST(obj) \ > > > @@ -769,6 +771,70 @@ sev_encrypt_data(void *handle, uint8_t *ptr, > > > uint64_t len) > > > return 0; > > > } > > > > > > +int sev_inject_launch_secret(const char *packet_hdr, > > > + const char *secret, uint64_t gpa) > > > +{ > > > + struct kvm_sev_launch_secret input; > > > + guchar *data = NULL, *hdr = NULL; > > > + int error, ret = 1; > > > + void *hva; > > > + gsize hdr_sz = 0, data_sz = 0; > > > + Error *local_err = NULL; > > > + MemoryRegion *mr = NULL; > > > + > > > + /* secret can be inject only in this state */ > > > + if (!sev_check_state(sev_guest, SEV_STATE_LAUNCH_SECRET)) { > > > + error_report("SEV: Not in correct state. (LSECRET) %x", > > > + sev_guest->state); > > > + return 1; > > > + } > > > + > > > + hdr = g_base64_decode(packet_hdr, &hdr_sz); > > > + if (!hdr || !hdr_sz) { > > > + error_report("SEV: Failed to decode sequence header"); > > > + return 1; > > > + } > > > + > > > + data = g_base64_decode(secret, &data_sz); > > > + if (!data || !data_sz) { > > > + error_report("SEV: Failed to decode data"); > > > + goto err; > > > + } > > > + > > > + hva = gpa2hva(&mr, gpa, data_sz, &local_err); > > > + if (!hva) { > > > + error_report("SEV: Failed to calculate guest address."); > > > + goto err; > > > + } > > > + > > > + input.hdr_uaddr = (uint64_t)(unsigned long)hdr; > > > + input.hdr_len = hdr_sz; > > > + > > > + input.trans_uaddr = (uint64_t)(unsigned long)data; > > > + input.trans_len = data_sz; > > > + > > > + input.guest_uaddr = (uint64_t)(unsigned long)hva; > > > + input.guest_len = data_sz; > > > + > > > + trace_kvm_sev_launch_secret(gpa, input.guest_uaddr, > > > + input.trans_uaddr, input.trans_len); > > > + > > > + ret = sev_ioctl(sev_guest->sev_fd, KVM_SEV_LAUNCH_SECRET, > > > + &input, &error); > > > + if (ret) { > > > + error_report("SEV: failed to inject secret ret=%d > > > fw_error=%d '%s'", > > > + ret, error, fw_error_to_str(error)); > > > + goto err; > > > + } > > > + > > > + ret = 0; > > > + > > > +err: > > > + g_free(data); > > > + g_free(hdr); > > > + return ret; > > > +} > > > + > > > static void > > > sev_register_types(void) > > > { > > > diff --git a/target/i386/trace-events b/target/i386/trace-events > > > index 789c700d4a..9f299e94a2 100644 > > > --- a/target/i386/trace-events > > > +++ b/target/i386/trace-events > > > @@ -15,3 +15,4 @@ kvm_sev_launch_start(int policy, void *session, > > > void *pdh) "policy 0x%x session > > > kvm_sev_launch_update_data(void *addr, uint64_t len) "addr %p len > > > 0x%" PRIu64 > > > 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" > > > -- > > > 2.20.1 (Apple Git-117) > > > > -- Dr. David Alan Gilbert / dgilb...@redhat.com / Manchester, UK