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x86/cpu/vmware: Fix platform detection VMWARE_PORT macro 

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>
This commit is contained in:
Thomas Hellstrom 2019-10-21 19:24:03 +02:00 committed by Ingo Molnar
parent db633a4e0e
commit 6fee2a0be0
1 changed files with 8 additions and 5 deletions
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13
arch/x86/include/asm/vmware.h
View File

@ -4,6 +4,7 @@
#include <asm/cpufeatures.h>
#include <asm/alternative.h>
#include <linux/stringify.h>
/*
* The hypercall definitions differ in the low word of the %edx argument
@ -20,8 +21,8 @@
*/
/* Old port-based version */
#define VMWARE_HYPERVISOR_PORT "0x5658"
#define VMWARE_HYPERVISOR_PORT_HB "0x5659"
#define VMWARE_HYPERVISOR_PORT 0x5658
#define VMWARE_HYPERVISOR_PORT_HB 0x5659
/* Current vmcall / vmmcall version */
#define VMWARE_HYPERVISOR_HB BIT(0)
@ -29,7 +30,7 @@
/* The low bandwidth call. The low word of edx is presumed clear. */
#define VMWARE_HYPERCALL \
ALTERNATIVE_2("movw $" VMWARE_HYPERVISOR_PORT ", %%dx; " \
ALTERNATIVE_2("movw $" __stringify(VMWARE_HYPERVISOR_PORT) ", %%dx; " \
"inl (%%dx), %%eax", \
"vmcall", X86_FEATURE_VMCALL, \
"vmmcall", X86_FEATURE_VMW_VMMCALL)
@ -39,7 +40,8 @@
* HB and OUT bits set.
*/
#define VMWARE_HYPERCALL_HB_OUT \
ALTERNATIVE_2("movw $" VMWARE_HYPERVISOR_PORT_HB ", %%dx; rep outsb", \
ALTERNATIVE_2("movw $" __stringify(VMWARE_HYPERVISOR_PORT_HB) ", %%dx; " \
"rep outsb", \
"vmcall", X86_FEATURE_VMCALL, \
"vmmcall", X86_FEATURE_VMW_VMMCALL)
@ -48,7 +50,8 @@
* HB bit set.
*/
#define VMWARE_HYPERCALL_HB_IN \
ALTERNATIVE_2("movw $" VMWARE_HYPERVISOR_PORT_HB ", %%dx; rep insb", \
ALTERNATIVE_2("movw $" __stringify(VMWARE_HYPERVISOR_PORT_HB) ", %%dx; " \
"rep insb", \
"vmcall", X86_FEATURE_VMCALL, \
"vmmcall", X86_FEATURE_VMW_VMMCALL)
#endif