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[PULL 21/36] i386: kvm: Add support for exposing PROVISIONKEY to guest
From: |
Paolo Bonzini |
Subject: |
[PULL 21/36] i386: kvm: Add support for exposing PROVISIONKEY to guest |
Date: |
Mon, 6 Sep 2021 15:10:44 +0200 |
From: Sean Christopherson <sean.j.christopherson@intel.com>
If the guest want to fully use SGX, the guest needs to be able to
access provisioning key. Add a new KVM_CAP_SGX_ATTRIBUTE to KVM to
support provisioning key to KVM guests.
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20210719112136.57018-14-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
target/i386/cpu.c | 5 ++++-
target/i386/kvm/kvm.c | 29 +++++++++++++++++++++++++++++
target/i386/kvm/kvm_i386.h | 2 ++
3 files changed, 35 insertions(+), 1 deletion(-)
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 38cf507199..3b1f9cbdf6 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -5542,7 +5542,10 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index,
uint32_t count,
*ecx |= XSTATE_FP_MASK | XSTATE_SSE_MASK;
/* Access to PROVISIONKEY requires additional credentials. */
- *eax &= ~(1U << 4);
+ if ((*eax & (1U << 4)) &&
+ !kvm_enable_sgx_provisioning(cs->kvm_state)) {
+ *eax &= ~(1U << 4);
+ }
}
#endif
break;
diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c
index 6dc40161e0..488926a95f 100644
--- a/target/i386/kvm/kvm.c
+++ b/target/i386/kvm/kvm.c
@@ -4644,6 +4644,35 @@ void kvm_arch_update_guest_debug(CPUState *cpu, struct
kvm_guest_debug *dbg)
}
}
+static bool has_sgx_provisioning;
+
+static bool __kvm_enable_sgx_provisioning(KVMState *s)
+{
+ int fd, ret;
+
+ if (!kvm_vm_check_extension(s, KVM_CAP_SGX_ATTRIBUTE)) {
+ return false;
+ }
+
+ fd = qemu_open_old("/dev/sgx_provision", O_RDONLY);
+ if (fd < 0) {
+ return false;
+ }
+
+ ret = kvm_vm_enable_cap(s, KVM_CAP_SGX_ATTRIBUTE, 0, fd);
+ if (ret) {
+ error_report("Could not enable SGX PROVISIONKEY: %s", strerror(-ret));
+ exit(1);
+ }
+ close(fd);
+ return true;
+}
+
+bool kvm_enable_sgx_provisioning(KVMState *s)
+{
+ return MEMORIZE(__kvm_enable_sgx_provisioning(s), has_sgx_provisioning);
+}
+
static bool host_supports_vmx(void)
{
uint32_t ecx, unused;
diff --git a/target/i386/kvm/kvm_i386.h b/target/i386/kvm/kvm_i386.h
index 54667b35f0..a978509d50 100644
--- a/target/i386/kvm/kvm_i386.h
+++ b/target/i386/kvm/kvm_i386.h
@@ -51,4 +51,6 @@ bool kvm_hyperv_expand_features(X86CPU *cpu, Error **errp);
uint64_t kvm_swizzle_msi_ext_dest_id(uint64_t address);
+bool kvm_enable_sgx_provisioning(KVMState *s);
+
#endif
--
2.31.1
- [PULL 14/36] i386: Add primary SGX CPUID and MSR defines, (continued)
- [PULL 14/36] i386: Add primary SGX CPUID and MSR defines, Paolo Bonzini, 2021/09/06
- [PULL 19/36] i386: Add feature control MSR dependency when SGX is enabled, Paolo Bonzini, 2021/09/06
- [PULL 20/36] i386: Update SGX CPUID info according to hardware/KVM/user input, Paolo Bonzini, 2021/09/06
- [PULL 16/36] i386: Add SGX CPUID leaf FEAT_SGX_12_0_EBX, Paolo Bonzini, 2021/09/06
- [PULL 17/36] i386: Add SGX CPUID leaf FEAT_SGX_12_1_EAX, Paolo Bonzini, 2021/09/06
- [PULL 22/36] i386: Propagate SGX CPUID sub-leafs to KVM, Paolo Bonzini, 2021/09/06
- [PULL 24/36] hw/i386/fw_cfg: Set SGX bits in feature control fw_cfg accordingly, Paolo Bonzini, 2021/09/06
- [PULL 13/36] vl: Add sgx compound properties to expose SGX EPC sections to guest, Paolo Bonzini, 2021/09/06
- [PULL 11/36] qom: Add memory-backend-epc ObjectOptions support, Paolo Bonzini, 2021/09/06
- [PULL 18/36] i386: Add get/set/migrate support for SGX_LEPUBKEYHASH MSRs, Paolo Bonzini, 2021/09/06
- [PULL 21/36] i386: kvm: Add support for exposing PROVISIONKEY to guest,
Paolo Bonzini <=
- [PULL 23/36] Adjust min CPUID level to 0x12 when SGX is enabled, Paolo Bonzini, 2021/09/06
- [PULL 25/36] hw/i386/pc: Account for SGX EPC sections when calculating device memory, Paolo Bonzini, 2021/09/06
- [PULL 28/36] q35: Add support for SGX EPC, Paolo Bonzini, 2021/09/06
- [PULL 27/36] i386: acpi: Add SGX EPC entry to ACPI tables, Paolo Bonzini, 2021/09/06
- [PULL 26/36] i386/pc: Add e820 entry for SGX EPC section(s), Paolo Bonzini, 2021/09/06
- [PULL 29/36] i440fx: Add support for SGX EPC, Paolo Bonzini, 2021/09/06
- [PULL 31/36] sgx-epc: Add the reset interface for sgx-epc virt device, Paolo Bonzini, 2021/09/06
- [PULL 30/36] hostmem-epc: Add the reset interface for EPC backend reset, Paolo Bonzini, 2021/09/06
- [PULL 32/36] sgx-epc: Avoid bios reset during sgx epc initialization, Paolo Bonzini, 2021/09/06
- [PULL 33/36] hostmem-epc: Make prealloc consistent with qemu cmdline during reset, Paolo Bonzini, 2021/09/06