[RFC PATCH v3 29/31] KVM: selftests: TDX: Add support for TDG.VP.VEINFO.GET

Ackerley Tng
2023-01-21T00:20:24Z

.../selftests/kvm/include/x86_64/tdx/tdx.h | 21 +++++++++++++++++++
.../selftests/kvm/lib/x86_64/tdx/tdx.c | 19 +++++++++++++++++
2 files changed, 40 insertions(+)

diff --git a/tools/testing/selftests/kvm/include/x86_64/tdx/tdx.h b/tools/testing/selftests/kvm/include/x86_64/tdx/tdx.h
index c8e4b9ce795ea..2dfb9432c32f9 100644
--- a/tools/testing/selftests/kvm/include/x86_64/tdx/tdx.h
+++ b/tools/testing/selftests/kvm/include/x86_64/tdx/tdx.h
@@ -5,6 +5,7 @@
#include <stdint.h>

#define TDG_VP_INFO 1
+#define TDG_VP_VEINFO_GET 3
#define TDG_MEM_PAGE_ACCEPT 6

#define TDG_VP_VMCALL_GET_TD_VM_CALL_INFO 0x10000
@@ -41,4 +42,24 @@ uint64_t tdg_vp_info(uint64_t *rcx, uint64_t *rdx,
uint64_t tdg_vp_vmcall_map_gpa(uint64_t address, uint64_t size, uint64_t *data_out);
uint64_t tdg_mem_page_accept(uint64_t gpa, uint8_t level);

+/*
+ * Used by the #VE exception handler to gather the #VE exception
+ * info from the TDX module. This is a software only structure
+ * and not part of the TDX module/VMM ABI.
+ *
+ * Adapted from arch/x86/include/asm/tdx.h
+ */
+struct ve_info {
+ uint64_t exit_reason;
+ uint64_t exit_qual;
+ /* Guest Linear (virtual) Address */
+ uint64_t gla;
+ /* Guest Physical Address */
+ uint64_t gpa;
+ uint32_t instr_len;
+ uint32_t instr_info;
+};
+
+uint64_t tdg_vp_veinfo_get(struct ve_info *ve);
+
#endif // SELFTEST_TDX_TDX_H
diff --git a/tools/testing/selftests/kvm/lib/x86_64/tdx/tdx.c b/tools/testing/selftests/kvm/lib/x86_64/tdx/tdx.c
index 2ebc47e268779..11a19832758bb 100644
--- a/tools/testing/selftests/kvm/lib/x86_64/tdx/tdx.c
+++ b/tools/testing/selftests/kvm/lib/x86_64/tdx/tdx.c
@@ -210,3 +210,22 @@ uint64_t tdg_mem_page_accept(uint64_t gpa, uint8_t level)
{
return __tdx_module_call(TDG_MEM_PAGE_ACCEPT, gpa | level, 0, 0, 0, NULL);
}
+
+uint64_t tdg_vp_veinfo_get(struct ve_info *ve)
+{
+ uint64_t ret;
+ struct tdx_module_output out;
+
+ memset(&out, 0, sizeof(struct tdx_module_output));
+
+ ret = __tdx_module_call(TDG_VP_VEINFO_GET, 0, 0, 0, 0, &out);
+
+ ve->exit_reason = out.rcx;
+ ve->exit_qual = out.rdx;
+ ve->gla = out.r8;
+ ve->gpa = out.r9;
+ ve->instr_len = out.r10 & 0xffffffff;
+ ve->instr_info = out.r10 >> 32;
+
+ return ret;
+}
--
2.39.0.246.g2a6d74b583-goog