From: Ackerley Tng <ackerley...@google.com>
Support TDG.VP.VEINFO.GET that the guest uses to obtain the
virtualization exception information of the recent #VE
exception.
Signed-off-by: Ackerley Tng <ackerley...@google.com>
Signed-off-by: Sagi Shahar <sa...@google.com>
---
.../selftests/kvm/include/x86/tdx/tdx.h | 21 +++++++++++++++++++
tools/testing/selftests/kvm/lib/x86/tdx/tdx.c | 19 +++++++++++++++++
2 files changed, 40 insertions(+)
diff --git a/tools/testing/selftests/kvm/include/x86/tdx/tdx.h
b/tools/testing/selftests/kvm/include/x86/tdx/tdx.h
index 53637159fa12..55e52ad3de55 100644
--- a/tools/testing/selftests/kvm/include/x86/tdx/tdx.h
+++ b/tools/testing/selftests/kvm/include/x86/tdx/tdx.h
@@ -7,6 +7,7 @@
#include "kvm_util.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
@@ -43,4 +44,24 @@ 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/tdx/tdx.c
b/tools/testing/selftests/kvm/lib/x86/tdx/tdx.c
index a51ab7511936..e42b586808a1 100644
--- a/tools/testing/selftests/kvm/lib/x86/tdx/tdx.c
+++ b/tools/testing/selftests/kvm/lib/x86/tdx/tdx.c
@@ -222,3 +222,22 @@ uint64_t tdg_mem_page_accept(uint64_t gpa, uint8_t level)
return __tdx_module_call(TDG_MEM_PAGE_ACCEPT, (gpa & PAGE_MASK) | level,
0, 0, 0, NULL);
}
+
+uint64_t tdg_vp_veinfo_get(struct ve_info *ve)
+{
+ struct tdx_module_output out;
+ uint64_t ret;
+
+ 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;
+}
--
2.50.0.rc2.692.g299adb8693-goog
