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Merge branch 'x86-vmware-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Ver a proveniência 
Pull x86 vmware updates from Ingo Molnar:
 "This updates the VMWARE guest driver with support for VMCALL/VMMCALL
  based hypercalls"

* 'x86-vmware-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  input/vmmouse: Update the backdoor call with support for new instructions
  drm/vmwgfx: Update the backdoor call with support for new instructions
  x86/vmware: Add a header file for hypercall definitions
  x86/vmware: Update platform detection code for VMCALL/VMMCALL hypercalls
Este cometimento está contido em:
Linus Torvalds
2019-09-16 19:40:24 -07:00
ascendente e2bddc20b5 f7b15c74cf
cometimento 7ac63f6ba5
7 ficheiros modificados com 164 adições e 50 eliminações
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96
arch/x86/kernel/cpu/vmware.c
Ver ficheiro

@@ -30,34 +30,69 @@
#include <asm/hypervisor.h>
#include <asm/timer.h>
#include <asm/apic.h>
#include <asm/vmware.h>
#undef pr_fmt
#define pr_fmt(fmt) "vmware: " fmt
#define CPUID_VMWARE_INFO_LEAF 0x40000000
#define VMWARE_HYPERVISOR_MAGIC 0x564D5868
#define VMWARE_HYPERVISOR_PORT 0x5658
#define CPUID_VMWARE_INFO_LEAF 0x40000000
#define CPUID_VMWARE_FEATURES_LEAF 0x40000010
#define CPUID_VMWARE_FEATURES_ECX_VMMCALL BIT(0)
#define CPUID_VMWARE_FEATURES_ECX_VMCALL BIT(1)
#define VMWARE_PORT_CMD_GETVERSION 10
#define VMWARE_PORT_CMD_GETHZ 45
#define VMWARE_PORT_CMD_GETVCPU_INFO 68
#define VMWARE_PORT_CMD_LEGACY_X2APIC 3
#define VMWARE_PORT_CMD_VCPU_RESERVED 31
#define VMWARE_HYPERVISOR_MAGIC 0x564D5868
#define VMWARE_CMD_GETVERSION 10
#define VMWARE_CMD_GETHZ 45
#define VMWARE_CMD_GETVCPU_INFO 68
#define VMWARE_CMD_LEGACY_X2APIC 3
#define VMWARE_CMD_VCPU_RESERVED 31
#define VMWARE_PORT(cmd, eax, ebx, ecx, edx) \
__asm__("inl (%%dx)" : \
"=a"(eax), "=c"(ecx), "=d"(edx), "=b"(ebx) : \
"0"(VMWARE_HYPERVISOR_MAGIC), \
"1"(VMWARE_PORT_CMD_##cmd), \
"2"(VMWARE_HYPERVISOR_PORT), "3"(UINT_MAX) : \
"memory");
"=a"(eax), "=c"(ecx), "=d"(edx), "=b"(ebx) : \
"a"(VMWARE_HYPERVISOR_MAGIC), \
"c"(VMWARE_CMD_##cmd), \
"d"(VMWARE_HYPERVISOR_PORT), "b"(UINT_MAX) : \
"memory")
#define VMWARE_VMCALL(cmd, eax, ebx, ecx, edx) \
__asm__("vmcall" : \
"=a"(eax), "=c"(ecx), "=d"(edx), "=b"(ebx) : \
"a"(VMWARE_HYPERVISOR_MAGIC), \
"c"(VMWARE_CMD_##cmd), \
"d"(0), "b"(UINT_MAX) : \
"memory")
#define VMWARE_VMMCALL(cmd, eax, ebx, ecx, edx) \
__asm__("vmmcall" : \
"=a"(eax), "=c"(ecx), "=d"(edx), "=b"(ebx) : \
"a"(VMWARE_HYPERVISOR_MAGIC), \
"c"(VMWARE_CMD_##cmd), \
"d"(0), "b"(UINT_MAX) : \
"memory")
#define VMWARE_CMD(cmd, eax, ebx, ecx, edx) do { \
switch (vmware_hypercall_mode) { \
case CPUID_VMWARE_FEATURES_ECX_VMCALL: \
VMWARE_VMCALL(cmd, eax, ebx, ecx, edx); \
break; \
case CPUID_VMWARE_FEATURES_ECX_VMMCALL: \
VMWARE_VMMCALL(cmd, eax, ebx, ecx, edx); \
break; \
default: \
VMWARE_PORT(cmd, eax, ebx, ecx, edx); \
break; \
} \
} while (0)
static unsigned long vmware_tsc_khz __ro_after_init;
static u8 vmware_hypercall_mode __ro_after_init;
static inline int __vmware_platform(void)
{
uint32_t eax, ebx, ecx, edx;
VMWARE_PORT(GETVERSION, eax, ebx, ecx, edx);
VMWARE_CMD(GETVERSION, eax, ebx, ecx, edx);
return eax != (uint32_t)-1 && ebx == VMWARE_HYPERVISOR_MAGIC;
}
@@ -129,6 +164,10 @@ static void __init vmware_set_capabilities(void)
{
setup_force_cpu_cap(X86_FEATURE_CONSTANT_TSC);
setup_force_cpu_cap(X86_FEATURE_TSC_RELIABLE);
if (vmware_hypercall_mode == CPUID_VMWARE_FEATURES_ECX_VMCALL)
setup_force_cpu_cap(X86_FEATURE_VMCALL);
else if (vmware_hypercall_mode == CPUID_VMWARE_FEATURES_ECX_VMMCALL)
setup_force_cpu_cap(X86_FEATURE_VMW_VMMCALL);
}
static void __init vmware_platform_setup(void)
@@ -136,7 +175,7 @@ static void __init vmware_platform_setup(void)
uint32_t eax, ebx, ecx, edx;
uint64_t lpj, tsc_khz;
VMWARE_PORT(GETHZ, eax, ebx, ecx, edx);
VMWARE_CMD(GETHZ, eax, ebx, ecx, edx);
if (ebx != UINT_MAX) {
lpj = tsc_khz = eax | (((uint64_t)ebx) << 32);
@@ -174,10 +213,21 @@ static void __init vmware_platform_setup(void)
vmware_set_capabilities();
}
static u8 vmware_select_hypercall(void)
{
int eax, ebx, ecx, edx;
cpuid(CPUID_VMWARE_FEATURES_LEAF, &eax, &ebx, &ecx, &edx);
return (ecx & (CPUID_VMWARE_FEATURES_ECX_VMMCALL |
CPUID_VMWARE_FEATURES_ECX_VMCALL));
}
/*
* While checking the dmi string information, just checking the product
* serial key should be enough, as this will always have a VMware
* specific string when running under VMware hypervisor.
* If !boot_cpu_has(X86_FEATURE_HYPERVISOR), vmware_hypercall_mode
* intentionally defaults to 0.
*/
static uint32_t __init vmware_platform(void)
{
@@ -187,8 +237,16 @@ static uint32_t __init vmware_platform(void)
cpuid(CPUID_VMWARE_INFO_LEAF, &eax, &hyper_vendor_id[0],
&hyper_vendor_id[1], &hyper_vendor_id[2]);
if (!memcmp(hyper_vendor_id, "VMwareVMware", 12))
if (!memcmp(hyper_vendor_id, "VMwareVMware", 12)) {
if (eax >= CPUID_VMWARE_FEATURES_LEAF)
vmware_hypercall_mode =
vmware_select_hypercall();
pr_info("hypercall mode: 0x%02x\n",
(unsigned int) vmware_hypercall_mode);
return CPUID_VMWARE_INFO_LEAF;
}
} else if (dmi_available && dmi_name_in_serial("VMware") &&
__vmware_platform())
return 1;
@@ -200,9 +258,9 @@ static uint32_t __init vmware_platform(void)
static bool __init vmware_legacy_x2apic_available(void)
{
uint32_t eax, ebx, ecx, edx;
VMWARE_PORT(GETVCPU_INFO, eax, ebx, ecx, edx);
return (eax & (1 << VMWARE_PORT_CMD_VCPU_RESERVED)) == 0 &&
(eax & (1 << VMWARE_PORT_CMD_LEGACY_X2APIC)) != 0;
VMWARE_CMD(GETVCPU_INFO, eax, ebx, ecx, edx);
return (eax & (1 << VMWARE_CMD_VCPU_RESERVED)) == 0 &&
(eax & (1 << VMWARE_CMD_LEGACY_X2APIC)) != 0;
}
const __initconst struct hypervisor_x86 x86_hyper_vmware = {