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6fee2a0be0
The platform detection VMWARE_PORT macro uses the VMWARE_HYPERVISOR_PORT
definition, but expects it to be an integer. However, when it was moved
to the new vmware.h include file, it was changed to be a string to better
fit into the VMWARE_HYPERCALL set of macros. This obviously breaks the
platform detection VMWARE_PORT functionality.
Change the VMWARE_HYPERVISOR_PORT and VMWARE_HYPERVISOR_PORT_HB
definitions to be integers, and use __stringify() for their stringified
form when needed.
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sean Christopherson <sean.j.christopherson@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: b4dd4f6e36 ("Add a header file for hypercall definitions")
Link: https://lkml.kernel.org/r/20191021172403.3085-3-thomas_os@shipmail.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
57 lines
1.9 KiB
C
57 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 or MIT */
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#ifndef _ASM_X86_VMWARE_H
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#define _ASM_X86_VMWARE_H
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#include <asm/cpufeatures.h>
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#include <asm/alternative.h>
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#include <linux/stringify.h>
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/*
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* The hypercall definitions differ in the low word of the %edx argument
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* in the following way: the old port base interface uses the port
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* number to distinguish between high- and low bandwidth versions.
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*
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* The new vmcall interface instead uses a set of flags to select
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* bandwidth mode and transfer direction. The flags should be loaded
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* into %dx by any user and are automatically replaced by the port
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* number if the VMWARE_HYPERVISOR_PORT method is used.
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*
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* In short, new driver code should strictly use the new definition of
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* %dx content.
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*/
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/* Old port-based version */
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#define VMWARE_HYPERVISOR_PORT 0x5658
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#define VMWARE_HYPERVISOR_PORT_HB 0x5659
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/* Current vmcall / vmmcall version */
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#define VMWARE_HYPERVISOR_HB BIT(0)
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#define VMWARE_HYPERVISOR_OUT BIT(1)
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/* The low bandwidth call. The low word of edx is presumed clear. */
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#define VMWARE_HYPERCALL \
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ALTERNATIVE_2("movw $" __stringify(VMWARE_HYPERVISOR_PORT) ", %%dx; " \
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"inl (%%dx), %%eax", \
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"vmcall", X86_FEATURE_VMCALL, \
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"vmmcall", X86_FEATURE_VMW_VMMCALL)
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/*
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* The high bandwidth out call. The low word of edx is presumed to have the
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* HB and OUT bits set.
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*/
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#define VMWARE_HYPERCALL_HB_OUT \
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ALTERNATIVE_2("movw $" __stringify(VMWARE_HYPERVISOR_PORT_HB) ", %%dx; " \
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"rep outsb", \
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"vmcall", X86_FEATURE_VMCALL, \
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"vmmcall", X86_FEATURE_VMW_VMMCALL)
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/*
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* The high bandwidth in call. The low word of edx is presumed to have the
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* HB bit set.
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*/
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#define VMWARE_HYPERCALL_HB_IN \
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ALTERNATIVE_2("movw $" __stringify(VMWARE_HYPERVISOR_PORT_HB) ", %%dx; " \
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"rep insb", \
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"vmcall", X86_FEATURE_VMCALL, \
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"vmmcall", X86_FEATURE_VMW_VMMCALL)
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#endif
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