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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /arch/x86/include/asm/vmware.h
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/x86/include/asm/vmware.h')
-rw-r--r--arch/x86/include/asm/vmware.h57
1 files changed, 57 insertions, 0 deletions
diff --git a/arch/x86/include/asm/vmware.h b/arch/x86/include/asm/vmware.h
new file mode 100644
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+++ b/arch/x86/include/asm/vmware.h
@@ -0,0 +1,57 @@
+/* SPDX-License-Identifier: GPL-2.0 or MIT */
+#ifndef _ASM_X86_VMWARE_H
+#define _ASM_X86_VMWARE_H
+
+#include <asm/cpufeatures.h>
+#include <asm/alternative.h>
+#include <linux/stringify.h>
+
+/*
+ * The hypercall definitions differ in the low word of the %edx argument
+ * in the following way: the old port base interface uses the port
+ * number to distinguish between high- and low bandwidth versions.
+ *
+ * The new vmcall interface instead uses a set of flags to select
+ * bandwidth mode and transfer direction. The flags should be loaded
+ * into %dx by any user and are automatically replaced by the port
+ * number if the VMWARE_HYPERVISOR_PORT method is used.
+ *
+ * In short, new driver code should strictly use the new definition of
+ * %dx content.
+ */
+
+/* Old port-based version */
+#define VMWARE_HYPERVISOR_PORT 0x5658
+#define VMWARE_HYPERVISOR_PORT_HB 0x5659
+
+/* Current vmcall / vmmcall version */
+#define VMWARE_HYPERVISOR_HB BIT(0)
+#define VMWARE_HYPERVISOR_OUT BIT(1)
+
+/* The low bandwidth call. The low word of edx is presumed clear. */
+#define VMWARE_HYPERCALL \
+ ALTERNATIVE_2("movw $" __stringify(VMWARE_HYPERVISOR_PORT) ", %%dx; " \
+ "inl (%%dx), %%eax", \
+ "vmcall", X86_FEATURE_VMCALL, \
+ "vmmcall", X86_FEATURE_VMW_VMMCALL)
+
+/*
+ * The high bandwidth out call. The low word of edx is presumed to have the
+ * HB and OUT bits set.
+ */
+#define VMWARE_HYPERCALL_HB_OUT \
+ ALTERNATIVE_2("movw $" __stringify(VMWARE_HYPERVISOR_PORT_HB) ", %%dx; " \
+ "rep outsb", \
+ "vmcall", X86_FEATURE_VMCALL, \
+ "vmmcall", X86_FEATURE_VMW_VMMCALL)
+
+/*
+ * The high bandwidth in call. The low word of edx is presumed to have the
+ * HB bit set.
+ */
+#define VMWARE_HYPERCALL_HB_IN \
+ ALTERNATIVE_2("movw $" __stringify(VMWARE_HYPERVISOR_PORT_HB) ", %%dx; " \
+ "rep insb", \
+ "vmcall", X86_FEATURE_VMCALL, \
+ "vmmcall", X86_FEATURE_VMW_VMMCALL)
+#endif