vmmon: quick workaround for objtool warnings

As discussed in

  https://bugzilla.suse.com/show_bug.cgi?id=1059674

the reason for multiple objtool warnings is the fact that vmmon module
defines its own Panic() function which never returns. While it is marked as
such which is used by the compiler for optimization, there is no way to
find this from object file.

While this seems innocuous, it might result in problems with unwinder
later. The quickest way around is to replace vmmon's own Panic() with
standard kernel panic() until a cleaner solution is found.

vmmon-only/Makefile

@@ -136,9 +136,6 @@ ifdef VMX86_DEBUG
 CC_OPTS += -DVMX86_DEBUG
 endif
 
-# Add Spectre options when available
-CC_OPTS += $(call vm_check_gcc,-mindirect-branch=thunk -mindirect-branch-register,)
-
 include $(SRCROOT)/Makefile.kernel
 
 else

vmmon-only/include/vm_assert.h

@@ -67,6 +67,7 @@ extern "C" {
 #if defined (VMKPANIC) 
 #include "vmk_assert.h"
 #else /* !VMKPANIC */
+#include <linux/kernel.h>
 #define _ASSERT_PANIC(name) \
            Panic(_##name##Fmt "\n", __FILE__, __LINE__)
 #define _ASSERT_PANIC_BUG(bug, name) \
@@ -107,7 +108,7 @@ NORETURN void Panic_NoSave(const char *fmt, ...) PRINTF_DECL(1, 2);
 } while(0)
 
 #else
-NORETURN void Panic(const char *fmt, ...) PRINTF_DECL(1, 2);
+#define Panic panic
 #endif
 
 void LogThrottled(uint32 *count, const char *fmt, ...) PRINTF_DECL(2, 3);

vmmon-only/include/x86_basic_defs.h

@@ -35,6 +35,8 @@
 #define INCLUDE_ALLOW_VMCORE
 #include "includeCheck.h"
 
+#include <asm/processor-flags.h>
+
 #define X86_MAX_INSTR_LEN  15   /* Max byte length of an x86 instruction. */
 
 #define NUM_IDT_VECTORS 256
@@ -75,7 +77,9 @@
 #define CR3_PDB_MASK   0xfffff000
 #define CR3_IGNORE     0xFFF
 #define PAE_CR3_IGNORE 0x1F
+#ifndef CR3_PCID_MASK
 #define CR3_PCID_MASK  0xFFF
+#endif
 #define CR3_NO_FLUSH   (1ULL << 63)
 
 #define CR4_VME        0x00000001

vmmon-only/include/x86msr.h

@@ -24,6 +24,7 @@
 
 #ifndef _X86MSR_H_
 #define _X86MSR_H_
+#include <asm/msr-index.h>
 #define INCLUDE_ALLOW_USERLEVEL
 #define INCLUDE_ALLOW_VMX
 
@@ -119,6 +120,7 @@ MSRQuery;
 #define MSR_ARCH_CAPABILITIES_RSBA                (1ULL << 2)
 #define MSR_ARCH_CAPABILITIES_NOL1F_VMENTRY       (1ULL << 3)
 #define MSR_ARCH_CAPABILITIES_SSB_NO              (1ULL << 4)
+#define MSR_ARCH_CAPABILITIES_MDS_NO              (1ULL << 5)
 
 #define MSR_FLUSH_CMD                        0x10b
 #define MSR_FLUSH_CMD_FLUSH_L1D                   (1ULL << 0)
@@ -129,7 +131,10 @@ MSRQuery;
 
 #define MSR_PRED_CMD_IBPB                         (1UL << 0)
 
+
+#ifndef MSR_MISC_FEATURES_ENABLES
 #define MSR_MISC_FEATURES_ENABLES            0x140
+#endif
 
 /* Intel Core Architecture and later: use only architected counters. */
 #define IA32_MSR_PERF_CAPABILITIES                   0x345
@@ -682,7 +687,11 @@ typedef unsigned char MTRRType;
 /*
  * MISC_FEATURES_ENABLES bits
  */
+#ifdef MSR_MISC_FEATURES_ENABLES_CPUID_FAULT
+#define MSR_MISC_FEATURES_ENABLES_CPUID_FAULTING MSR_MISC_FEATURES_ENABLES_CPUID_FAULT
+#else
 #define MSR_MISC_FEATURES_ENABLES_CPUID_FAULTING 1
+#endif
 
 
 

vmmon-only/linux/driver.c

@@ -1533,7 +1533,7 @@ LinuxDriver_Ioctl(struct file *filp,    // IN:
       }
 
    case IOCTL_VMX86_WRITE_PAGE: {
-#if VMX86_DEVEL
+#ifdef VMX86_DEVEL
          VMMReadWritePage req;
 
          retval = HostIF_CopyFromUser(&req, ioarg, sizeof req);

vmmon-only/linux/hostif.c

@@ -1,5 +1,5 @@
 /*********************************************************
- * Copyright (C) 1998-2019 VMware, Inc. All rights reserved.
+ * Copyright (C) 1998-2020 VMware, Inc. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the
@@ -2323,7 +2323,7 @@ SetVMAPICAddr(VMDriver *vm, // IN/OUT: driver state
    volatile void *hostapic;
 
    ASSERT_ON_COMPILE(APICR_SIZE <= PAGE_SIZE);
-   hostapic = (volatile void *) ioremap_nocache(ma, PAGE_SIZE);
+   hostapic = (volatile void *) ioremap(ma, PAGE_SIZE);
    if (hostapic) {
       if ((APIC_VERSIONREG(hostapic) & 0xF0) == 0x10) {
          vm->hostAPIC.base = (volatile uint32 (*)[4]) hostapic;

vmnet-only/Makefile

@@ -136,9 +136,6 @@ ifdef VMX86_DEBUG
 CC_OPTS += -DVMX86_DEBUG
 endif
 
-# Add Spectre options when available
-CC_OPTS += $(call vm_check_gcc,-mindirect-branch=thunk -mindirect-branch-register,)
-
 include $(SRCROOT)/Makefile.kernel
 
 else

vmnet-only/procfs.c

@@ -1,5 +1,5 @@
 /*********************************************************
- * Copyright (C) 1998-2013 VMware, Inc. All rights reserved.
+ * Copyright (C) 1998-2013, 2020 VMware, Inc. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the
@@ -137,6 +137,7 @@ VNetProcShow(struct seq_file *p, // IN:
 }
 
 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 18, 0)
 /*
  *----------------------------------------------------------------------
  *
@@ -168,6 +169,7 @@ static struct file_operations fops = {
    .release = single_release,
 };
 #endif
+#endif
 
 
 /*
@@ -203,7 +205,12 @@ VNetProcMakeEntryInt(VNetProcEntry   *parent,   // IN:
       } else {
          ent->data   = data;
          ent->fn     = fn;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 18, 0)
+         ent->pde    = proc_create_single_data(name, mode, parent->pde,
+                                               VNetProcShow, ent);
+#else
          ent->pde    = proc_create_data(name, mode, parent->pde, &fops, ent);
+#endif
       }
       if (ent->pde != NULL) {
          *ret = ent;

vmnet-only/userif.c

@@ -78,11 +78,11 @@ static int  VNetUserIfSetUplinkState(VNetPort *port, uint8 linkUp);
 extern unsigned int  vnet_max_qlen;
 
 #if COMPAT_LINUX_VERSION_CHECK_LT(3, 2, 0)
-#   define compat_kmap(page) kmap(page)
-#   define compat_kunmap(page) kunmap(page)
-#else
-#   define compat_kmap(page) kmap((page).p)
-#   define compat_kunmap(page) kunmap((page).p)
+#   define skb_frag_page(frag) (frag)->page
+#   define skb_frag_size(frag) (frag)->size
+#endif
+#if COMPAT_LINUX_VERSION_CHECK_LT(5, 4, 0)
+#   define skb_frag_off(frag) (frag)->page_offset
 #endif
 
 /*
@@ -568,20 +568,20 @@ VNetCsumCopyDatagram(const struct sk_buff *skb,	// IN: skb to copy
    for (frag = skb_shinfo(skb)->frags;
 	frag != skb_shinfo(skb)->frags + skb_shinfo(skb)->nr_frags;
 	frag++) {
-      if (frag->size > 0) {
+      if (skb_frag_size(frag) > 0) {
 	 unsigned int tmpCsum;
 	 const void *vaddr;
 
-	 vaddr = compat_kmap(frag->page);
-	 tmpCsum = csum_and_copy_to_user(vaddr + frag->page_offset,
-					 curr, frag->size, 0, &err);
-	 compat_kunmap(frag->page);
+	 vaddr = kmap(skb_frag_page(frag));
+	 tmpCsum = csum_and_copy_to_user(vaddr + skb_frag_off(frag),
+					 curr, skb_frag_size(frag), 0, &err);
+	 kunmap(skb_frag_page(frag));
 
 	 if (err) {
 	    return err;
 	 }
 	 csum = csum_block_add(csum, tmpCsum, curr - buf);
-	 curr += frag->size;
+	 curr += skb_frag_size(frag);
       }
    }
 

vmnet-only/vm_device_version.h

@@ -35,6 +35,8 @@
 #endif
 #endif
 
+#include <linux/pci_ids.h>
+
 /* LSILogic 53C1030 Parallel SCSI controller
  * LSILogic SAS1068 SAS controller
  */
@@ -53,7 +55,10 @@
  *    VMware HD Audio codec
  *    VMware HD Audio controller
  */
+#ifndef PCI_VENDOR_ID_VMWARE
 #define PCI_VENDOR_ID_VMWARE                    0x15AD
+#endif
+
 #define PCI_DEVICE_ID_VMWARE_SVGA3              0x0406
 #define PCI_DEVICE_ID_VMWARE_SVGA2              0x0405
 #define PCI_DEVICE_ID_VMWARE_SVGA               0x0710
@@ -71,7 +76,11 @@
 #define PCI_DEVICE_ID_VMWARE_1394               0x0780
 #define PCI_DEVICE_ID_VMWARE_BRIDGE             0x0790
 #define PCI_DEVICE_ID_VMWARE_ROOTPORT           0x07A0
+
+#ifndef PCI_DEVICE_ID_VMWARE_VMXNET3
 #define PCI_DEVICE_ID_VMWARE_VMXNET3            0x07B0
+#endif
+
 #define PCI_DEVICE_ID_VMWARE_PVSCSI             0x07C0
 #define PCI_DEVICE_ID_VMWARE_82574              0x07D0
 #define PCI_DEVICE_ID_VMWARE_AHCI               0x07E0