mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-08-05 16:54:27 +00:00
3bf8ce8284
In order to let all the APIs under <cpuid/api.h> have a shared "cpuid_"
namespace, rename hypervisor_cpuid_base() to cpuid_base_hypervisor().
To align with the new style, also rename:
for_each_possible_hypervisor_cpuid_base(function)
to:
for_each_possible_cpuid_base_hypervisor(function)
Adjust call-sites accordingly.
Suggested-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Ahmed S. Darwish <darwi@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: John Ogness <john.ogness@linutronix.de>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: x86-cpuid@lists.linux.dev
Link: https://lore.kernel.org/r/aCZOi0Oohc7DpgTo@lx-t490
92 lines
2.1 KiB
C
92 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _ASM_X86_ACRN_H
|
|
#define _ASM_X86_ACRN_H
|
|
|
|
/*
|
|
* This CPUID returns feature bitmaps in EAX.
|
|
* Guest VM uses this to detect the appropriate feature bit.
|
|
*/
|
|
#define ACRN_CPUID_FEATURES 0x40000001
|
|
/* Bit 0 indicates whether guest VM is privileged */
|
|
#define ACRN_FEATURE_PRIVILEGED_VM BIT(0)
|
|
|
|
/*
|
|
* Timing Information.
|
|
* This leaf returns the current TSC frequency in kHz.
|
|
*
|
|
* EAX: (Virtual) TSC frequency in kHz.
|
|
* EBX, ECX, EDX: RESERVED (reserved fields are set to zero).
|
|
*/
|
|
#define ACRN_CPUID_TIMING_INFO 0x40000010
|
|
|
|
void acrn_setup_intr_handler(void (*handler)(void));
|
|
void acrn_remove_intr_handler(void);
|
|
|
|
static inline u32 acrn_cpuid_base(void)
|
|
{
|
|
if (boot_cpu_has(X86_FEATURE_HYPERVISOR))
|
|
return cpuid_base_hypervisor("ACRNACRNACRN", 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline unsigned long acrn_get_tsc_khz(void)
|
|
{
|
|
return cpuid_eax(ACRN_CPUID_TIMING_INFO);
|
|
}
|
|
|
|
/*
|
|
* Hypercalls for ACRN
|
|
*
|
|
* - VMCALL instruction is used to implement ACRN hypercalls.
|
|
* - ACRN hypercall ABI:
|
|
* - Hypercall number is passed in R8 register.
|
|
* - Up to 2 arguments are passed in RDI, RSI.
|
|
* - Return value will be placed in RAX.
|
|
*
|
|
* Because GCC doesn't support R8 register as direct register constraints, use
|
|
* supported constraint as input with a explicit MOV to R8 in beginning of asm.
|
|
*/
|
|
static inline long acrn_hypercall0(unsigned long hcall_id)
|
|
{
|
|
long result;
|
|
|
|
asm volatile("movl %1, %%r8d\n\t"
|
|
"vmcall\n\t"
|
|
: "=a" (result)
|
|
: "g" (hcall_id)
|
|
: "r8", "memory");
|
|
|
|
return result;
|
|
}
|
|
|
|
static inline long acrn_hypercall1(unsigned long hcall_id,
|
|
unsigned long param1)
|
|
{
|
|
long result;
|
|
|
|
asm volatile("movl %1, %%r8d\n\t"
|
|
"vmcall\n\t"
|
|
: "=a" (result)
|
|
: "g" (hcall_id), "D" (param1)
|
|
: "r8", "memory");
|
|
|
|
return result;
|
|
}
|
|
|
|
static inline long acrn_hypercall2(unsigned long hcall_id,
|
|
unsigned long param1,
|
|
unsigned long param2)
|
|
{
|
|
long result;
|
|
|
|
asm volatile("movl %1, %%r8d\n\t"
|
|
"vmcall\n\t"
|
|
: "=a" (result)
|
|
: "g" (hcall_id), "D" (param1), "S" (param2)
|
|
: "r8", "memory");
|
|
|
|
return result;
|
|
}
|
|
|
|
#endif /* _ASM_X86_ACRN_H */
|