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[Qemu-devel] [PULL 13/22] sev/i386: add command to encrypt guest memory
From: |
Paolo Bonzini |
Subject: |
[Qemu-devel] [PULL 13/22] sev/i386: add command to encrypt guest memory region |
Date: |
Tue, 13 Mar 2018 13:56:29 +0100 |
From: Brijesh Singh <address@hidden>
The KVM_SEV_LAUNCH_UPDATE_DATA command is used to encrypt a guest memory
region using the VM Encryption Key created using LAUNCH_START.
Cc: Paolo Bonzini <address@hidden>
Cc: Richard Henderson <address@hidden>
Cc: Eduardo Habkost <address@hidden>
Signed-off-by: Brijesh Singh <address@hidden>
Signed-off-by: Paolo Bonzini <address@hidden>
---
target/i386/sev.c | 43 +++++++++++++++++++++++++++++++++++++++++++
target/i386/trace-events | 1 +
2 files changed, 44 insertions(+)
diff --git a/target/i386/sev.c b/target/i386/sev.c
index d855dd5..ff98159 100644
--- a/target/i386/sev.c
+++ b/target/i386/sev.c
@@ -105,6 +105,13 @@ fw_error_to_str(int code)
return sev_fw_errlist[code];
}
+static bool
+sev_check_state(SevState state)
+{
+ assert(sev_state);
+ return sev_state->state == state ? true : false;
+}
+
static void
sev_set_guest_state(SevState new_state)
{
@@ -486,6 +493,29 @@ sev_launch_start(SEVState *s)
return 0;
}
+static int
+sev_launch_update_data(uint8_t *addr, uint64_t len)
+{
+ int ret, fw_error;
+ struct kvm_sev_launch_update_data update;
+
+ if (!addr || !len) {
+ return 1;
+ }
+
+ update.uaddr = (__u64)addr;
+ update.len = len;
+ trace_kvm_sev_launch_update_data(addr, len);
+ ret = sev_ioctl(sev_state->sev_fd, KVM_SEV_LAUNCH_UPDATE_DATA,
+ &update, &fw_error);
+ if (ret) {
+ error_report("%s: LAUNCH_UPDATE ret=%d fw_error=%d '%s'",
+ __func__, ret, fw_error, fw_error_to_str(fw_error));
+ }
+
+ return ret;
+}
+
void *
sev_guest_init(const char *id)
{
@@ -571,6 +601,19 @@ err:
return NULL;
}
+int
+sev_encrypt_data(void *handle, uint8_t *ptr, uint64_t len)
+{
+ assert(handle);
+
+ /* if SEV is in update state then encrypt the data else do nothing */
+ if (sev_check_state(SEV_STATE_LAUNCH_UPDATE)) {
+ return sev_launch_update_data(ptr, len);
+ }
+
+ return 0;
+}
+
static void
sev_register_types(void)
{
diff --git a/target/i386/trace-events b/target/i386/trace-events
index 9402251..c0cd8e9 100644
--- a/target/i386/trace-events
+++ b/target/i386/trace-events
@@ -12,3 +12,4 @@ kvm_memcrypt_register_region(void *addr, size_t len) "addr %p
len 0x%lu"
kvm_memcrypt_unregister_region(void *addr, size_t len) "addr %p len 0x%lu"
kvm_sev_change_state(const char *old, const char *new) "%s -> %s"
kvm_sev_launch_start(int policy, void *session, void *pdh) "policy 0x%x
session %p pdh %p"
+kvm_sev_launch_update_data(void *addr, uint64_t len) "addr %p len 0x%" PRIu64
--
1.8.3.1
- [Qemu-devel] [PULL 00/22] KVM patches for QEMU 2.12 soft freeze, Paolo Bonzini, 2018/03/13
- [Qemu-devel] [PULL 03/22] machine: add memory-encryption option, Paolo Bonzini, 2018/03/13
- [Qemu-devel] [PULL 02/22] KVM: x86: Add support for save/load MSR_SMI_COUNT, Paolo Bonzini, 2018/03/13
- [Qemu-devel] [PULL 04/22] docs: add AMD Secure Encrypted Virtualization (SEV), Paolo Bonzini, 2018/03/13
- [Qemu-devel] [PULL 05/22] kvm: add memory encryption context, Paolo Bonzini, 2018/03/13
- [Qemu-devel] [PULL 06/22] kvm: introduce memory encryption APIs, Paolo Bonzini, 2018/03/13
- [Qemu-devel] [PULL 01/22] update Linux headers to 4.16-rc5, Paolo Bonzini, 2018/03/13
- [Qemu-devel] [PULL 09/22] include: add psp-sev.h header file, Paolo Bonzini, 2018/03/13
- [Qemu-devel] [PULL 07/22] target/i386: add Secure Encrypted Virtualization (SEV) object, Paolo Bonzini, 2018/03/13
- [Qemu-devel] [PULL 13/22] sev/i386: add command to encrypt guest memory region,
Paolo Bonzini <=
- [Qemu-devel] [PULL 11/22] sev/i386: register the guest memory range which may contain encrypted data, Paolo Bonzini, 2018/03/13
- [Qemu-devel] [PULL 08/22] sev/i386: qmp: add query-sev command, Paolo Bonzini, 2018/03/13
- [Qemu-devel] [PULL 12/22] sev/i386: add command to create launch memory encryption context, Paolo Bonzini, 2018/03/13
- [Qemu-devel] [PULL 10/22] sev/i386: add command to initialize the memory encryption context, Paolo Bonzini, 2018/03/13
- [Qemu-devel] [PULL 14/22] target/i386: encrypt bios rom, Paolo Bonzini, 2018/03/13
- [Qemu-devel] [PULL 15/22] sev/i386: add support to LAUNCH_MEASURE command, Paolo Bonzini, 2018/03/13
- [Qemu-devel] [PULL 16/22] sev/i386: finalize the SEV guest launch flow, Paolo Bonzini, 2018/03/13
- [Qemu-devel] [PULL 18/22] cpu/i386: populate CPUID 0x8000_001F when SEV is active, Paolo Bonzini, 2018/03/13
- [Qemu-devel] [PULL 19/22] sev/i386: hmp: add 'info sev' command, Paolo Bonzini, 2018/03/13
- [Qemu-devel] [PULL 17/22] sev/i386: add migration blocker, Paolo Bonzini, 2018/03/13