#include "qapi/error.h"
#include "exec/address-spaces.h"
#include "hw/i386/sgx.h"
+#include "sysemu/hw_accel.h"
+
+#define SGX_MAX_EPC_SECTIONS 8
+#define SGX_CPUID_EPC_INVALID 0x0
+
+/* A valid EPC section. */
+#define SGX_CPUID_EPC_SECTION 0x1
+#define SGX_CPUID_EPC_MASK 0xF
+
+static uint64_t sgx_calc_section_metric(uint64_t low, uint64_t high)
+{
+ return (low & MAKE_64BIT_MASK(12, 20)) +
+ ((high & MAKE_64BIT_MASK(0, 20)) << 32);
+}
+
+static uint64_t sgx_calc_host_epc_section_size(void)
+{
+ uint32_t i, type;
+ uint32_t eax, ebx, ecx, edx;
+ uint64_t size = 0;
+
+ for (i = 0; i < SGX_MAX_EPC_SECTIONS; i++) {
+ host_cpuid(0x12, i + 2, &eax, &ebx, &ecx, &edx);
+
+ type = eax & SGX_CPUID_EPC_MASK;
+ if (type == SGX_CPUID_EPC_INVALID) {
+ break;
+ }
+
+ if (type != SGX_CPUID_EPC_SECTION) {
+ break;
+ }
+
+ size += sgx_calc_section_metric(ecx, edx);
+ }
+
+ return size;
+}
+
+SGXInfo *sgx_get_capabilities(Error **errp)
+{
+ SGXInfo *info = NULL;
+ uint32_t eax, ebx, ecx, edx;
+
+ int fd = qemu_open_old("/dev/sgx_vepc", O_RDWR);
+ if (fd < 0) {
+ error_setg(errp, "SGX is not enabled in KVM");
+ return NULL;
+ }
+
+ info = g_new0(SGXInfo, 1);
+ host_cpuid(0x7, 0, &eax, &ebx, &ecx, &edx);
+
+ info->sgx = ebx & (1U << 2) ? true : false;
+ info->flc = ecx & (1U << 30) ? true : false;
+
+ host_cpuid(0x12, 0, &eax, &ebx, &ecx, &edx);
+ info->sgx1 = eax & (1U << 0) ? true : false;
+ info->sgx2 = eax & (1U << 1) ? true : false;
+
+ info->section_size = sgx_calc_host_epc_section_size();
+
+ close(fd);
+
+ return info;
+}
SGXInfo *sgx_get_info(Error **errp)
{
#
##
{ 'command': 'query-sgx', 'returns': 'SGXInfo', 'if': 'TARGET_I386' }
+
+##
+# @query-sgx-capabilities:
+#
+# Returns information from host SGX capabilities
+#
+# Returns: @SGXInfo
+#
+# Since: 6.2
+#
+# Example:
+#
+# -> { "execute": "query-sgx-capabilities" }
+# <- { "return": { "sgx": true, "sgx1" : true, "sgx2" : true,
+# "flc": true, "section-size" : 0 } }
+#
+##
+{ 'command': 'query-sgx-capabilities', 'returns': 'SGXInfo', 'if': 'TARGET_I386' }