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dm: acpi: retrieve physical APIC IDs and use them to fill in the ACPI MADT table

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Two utility functions are copied and adapted from hyerpervisor:
ffs64
bitmap_clear_nolock

Two public functions are provided for future use (such as for RTCTv2)
pcpuid_from_vcpuid
lapicid_from_pcpuid

Tracked-On: #6020
Reviewed-by: Wang, Yu1 <yu1.wang@intel.com>
Signed-off-by: dongshen <dongsheng.x.zhang@intel.com>
This commit is contained in:
dongshen
2021-05-19 17:41:16 -07:00
committed by wenlingz
parent 6680208ed9
commit 818c821d04
4 changed files with 111 additions and 2 deletions
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5
devicemodel/include/acpi.h
View File

@@ -29,6 +29,8 @@
#ifndef _ACPI_H_
#define _ACPI_H_
#include "vhm_ioctl_defs.h"
#define SCI_INT 9
#define SMI_CMD 0xb2
@@ -83,4 +85,7 @@ void inject_power_button_event(struct vmctx *ctx);
void power_button_init(struct vmctx *ctx);
void power_button_deinit(struct vmctx *ctx);
int pcpuid_from_vcpuid(uint64_t guest_pcpu_bitmask, int vcpu_id);
int lapicid_from_pcpuid(struct platform_info *plat_info, int pcpu_id);
#endif /* _ACPI_H_ */

28
devicemodel/include/types.h
View File

@@ -97,6 +97,34 @@ bitmap_weight(uint64_t bits)
}
#define build_bitmap_clear(name, op_len, op_type, lock) \
static inline void name(uint16_t nr_arg, volatile op_type *addr) \
{ \
uint16_t nr; \
nr = nr_arg & ((8U * sizeof(op_type)) - 1U); \
asm volatile(lock "and" op_len " %1,%0" \
: "+m" (*addr) \
: "r" ((op_type)(~(1UL<<(nr)))) \
: "cc", "memory"); \
}
build_bitmap_clear(bitmap_clear_nolock, "q", uint64_t, "")
/*
* ffs64 - Find the first (least significant) bit set of value
* and return the index of that bit.
*
* @return value: zero-based bit index, or if value is zero, returns INVALID_BIT_INDEX
*/
#define INVALID_BIT_INDEX 0xffffU
static inline uint16_t ffs64(uint64_t value)
{
/*
* __builtin_ffsl: returns one plus the index of the least significant 1-bit of value,
* or if value is zero, returns zero.
*/
return value ? (uint16_t)__builtin_ffsl(value) - 1U: INVALID_BIT_INDEX;
}
/* memory barrier */
#define mb() ({ asm volatile("mfence" ::: "memory"); (void)0; })