Support for xcr0 to be able to enable xsave/xrstor. This by itself
is not sufficient to enable xsave/xrstor. WHPX XSAVE API's also
needs to be hooked up.
---
target/i386/whp-dispatch.h | 3 ++
target/i386/whpx-all.c | 88 ++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 91 insertions(+)
diff --git a/target/i386/whp-dispatch.h b/target/i386/whp-dispatch.h
index 23791fbb47..b5d56b22a3 100644
--- a/target/i386/whp-dispatch.h
+++ b/target/i386/whp-dispatch.h
@@ -6,6 +6,9 @@
#include <WinHvPlatform.h>
#include <WinHvEmulation.h>
+/* This should eventually come from the Windows SDK */
+#define WHV_E_UNKNOWN_PROPERTY 0x80370302
+
#define LIST_WINHVPLATFORM_FUNCTIONS(X) \
X(HRESULT, WHvGetCapability, (WHV_CAPABILITY_CODE CapabilityCode, VOID*
CapabilityBuffer, UINT32 CapabilityBufferSizeInBytes, UINT32*
WrittenSizeInBytes)) \
X(HRESULT, WHvCreatePartition, (WHV_PARTITION_HANDLE* Partition)) \
diff --git a/target/i386/whpx-all.c b/target/i386/whpx-all.c
index ed95105eae..1abaac70db 100644
--- a/target/i386/whpx-all.c
+++ b/target/i386/whpx-all.c
@@ -161,10 +161,15 @@ struct whpx_vcpu {
static bool whpx_allowed;
static bool whp_dispatch_initialized;
static HMODULE hWinHvPlatform, hWinHvEmulation;
+static WHV_PROCESSOR_XSAVE_FEATURES whpx_xsave_cap;
struct whpx_state whpx_global;
struct WHPDispatch whp_dispatch;
+static bool whpx_has_xsave(void)
+{
+ return whpx_xsave_cap.XsaveSupport;
+}
/*
* VP support
@@ -216,6 +221,28 @@ static SegmentCache whpx_seg_h2q(const
WHV_X64_SEGMENT_REGISTER *hs)
return qs;
}
+/* X64 Extended Control Registers */
+static void whpx_set_xcrs(CPUState *cpu)
+{
+ struct CPUX86State *env = (CPUArchState *)(cpu->env_ptr);
+ HRESULT hr;
+ struct whpx_state *whpx = &whpx_global;
+ WHV_REGISTER_VALUE xcr0;
+ WHV_REGISTER_NAME xcr0_name = WHvX64RegisterXCr0;
+
+ if (!whpx_has_xsave()) {
+ return;
+ }
+
+ /* Only xcr0 is supported by the hypervisor currently */
+ xcr0.Reg64 = env->xcr0;
+ hr = whp_dispatch.WHvSetVirtualProcessorRegisters(
+ whpx->partition, cpu->cpu_index, &xcr0_name, 1, &xcr0);
+ if (FAILED(hr)) {
+ error_report("WHPX: Failed to set register xcr0, hr=%08lx", hr);
+ }
+}
+
static void whpx_set_registers(CPUState *cpu)
{
struct whpx_state *whpx = &whpx_global;
@@ -291,6 +318,12 @@ static void whpx_set_registers(CPUState *cpu)
/* 8 Debug Registers - Skipped */
+ /*
+ * Extended control registers needs to be handled separately depending
+ * on whether xsave is supported/enabled or not.
+ */
+ whpx_set_xcrs(cpu);
+
/* 16 XMM registers */
assert(whpx_register_names[idx] == WHvX64RegisterXmm0);
idx_next = idx + 16;
@@ -380,6 +413,30 @@ static void whpx_set_registers(CPUState *cpu)
return;
}
+/* X64 Extended Control Registers */
+static void whpx_get_xcrs(CPUState *cpu)
+{
+ struct CPUX86State *env = (CPUArchState *)(cpu->env_ptr);
+ HRESULT hr;
+ struct whpx_state *whpx = &whpx_global;
+ WHV_REGISTER_VALUE xcr0;
+ WHV_REGISTER_NAME xcr0_name = WHvX64RegisterXCr0;
+
+ if (!whpx_has_xsave()) {
+ return;
+ }
+
+ /* Only xcr0 is supported by the hypervisor currently */
+ hr = whp_dispatch.WHvGetVirtualProcessorRegisters(
+ whpx->partition, cpu->cpu_index, &xcr0_name, 1, &xcr0);
+ if (FAILED(hr)) {
+ error_report("WHPX: Failed to get register xcr0, hr=%08lx", hr);
+ return;
+ }
+
+ env->xcr0 = xcr0.Reg64;
+}
+
static void whpx_get_registers(CPUState *cpu)
{
struct whpx_state *whpx = &whpx_global;
@@ -457,6 +514,12 @@ static void whpx_get_registers(CPUState *cpu)
/* 8 Debug Registers - Skipped */
+ /*
+ * Extended control registers needs to be handled separately depending
+ * on whether xsave is supported/enabled or not.
+ */
+ whpx_get_xcrs(cpu);
+
/* 16 XMM registers */
assert(whpx_register_names[idx] == WHvX64RegisterXmm0);
idx_next = idx + 16;
@@ -1395,6 +1458,31 @@ static int whpx_accel_init(MachineState *ms)
goto error;
}
+ /*
+ * Query the XSAVE capability of the partition. Any error here is not
+ * considered fatal.
+ */
+ hr = whp_dispatch.WHvGetPartitionProperty(
+ whpx->partition,
+ WHvPartitionPropertyCodeProcessorXsaveFeatures,
+ &whpx_xsave_cap,
+ sizeof(whpx_xsave_cap),
+ &whpx_cap_size);
+
+ /*
+ * Windows version which don't support this property will return with the
+ * specific error code.
+ */
+ if (FAILED(hr) && hr != WHV_E_UNKNOWN_PROPERTY) {
+ error_report("WHPX: Failed to query XSAVE capability, hr=%08lx", hr);
+ }
+
+ if (whpx_has_xsave()) {
+ printf("WHPX: Partition XSAVE capable\n");
+ } else {
+ printf("WHPX: Partition is not XSAVE capable\n");
+ }
+
memset(&prop, 0, sizeof(WHV_PARTITION_PROPERTY));
prop.ProcessorCount = ms->smp.cpus;
hr = whp_dispatch.WHvSetPartitionProperty(
--
2.16.4
