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HV: treewide: enforce unsignedness of pcpu_id

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In the hypervisor, physical cpu id is defined as "int" or "uint32_t"
type in the hypervisor. So there are some sign conversion issues
about  physical cpu id (pcpu_id) reported by static analysis tool.
Sign conversion violates the rules of MISRA C:2012.

In this patch, define physical cpu id as "uint16_t" type for all
modules in the hypervisor and change related codes. The valid
range of pcpu_id is 0~65534, INVALID_PCPU_ID is defined to the
invalid pcpu_id for error detection, BROADCAST_PCPU_ID is
broadcast pcpu_id used to notify all valid pcpu.

The type of pcpu_id in the struct vcpu and vcpu_id is "int" type,
this will be fixed in another patch.

V1-->V2:
    *  Change the type of pcpu_id from uint32_t to uint16_t;
    *  Define INVALID_PCPU_ID for error detection;
    *  Define BROADCAST_PCPU_ID to notify all valid pcpu.

V2-->V3:
    *  Update comments for INVALID_PCPU_ID and BROADCAST_PCPU_ID;
    *  Update addtional pcpu_id;
    *  Convert hexadecimals to unsigned to meet the type of pcpu_id;
    *  Clean up for MIN_PCPU_ID and MAX_PCPU_ID, they will be
       defined by configuration.
Note: fix bug in the init_lapic(), the pcpu_id shall be less than 8,
this is constraint by implement in the init_lapic().
Signed-off-by: Xiangyang Wu <xiangyang.wu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Xiangyang Wu
2018-06-20 15:42:52 +08:00
committed by lijinxia
parent 2922a657c9
commit 3027bfab10
37 changed files with 110 additions and 94 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
hypervisor/arch/x86/cpu.c
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@@ -23,7 +23,7 @@ spinlock_t up_count_spinlock = {
};
struct per_cpu_region *per_cpu_data_base_ptr;
int phy_cpu_num = 0;
uint16_t phy_cpu_num = 0U;
unsigned long pcpu_sync = 0;
volatile uint32_t up_count = 0;
@@ -224,7 +224,7 @@ static int hardware_detect_support(void)
return 0;
}
static void alloc_phy_cpu_data(int pcpu_num)
static void alloc_phy_cpu_data(uint16_t pcpu_num)
{
phy_cpu_num = pcpu_num;
@@ -245,7 +245,8 @@ int __attribute__((weak)) parse_madt(uint8_t *lapic_id_base)
static int init_phy_cpu_storage(void)
{
int i, pcpu_num = 0;
int i;
uint16_t pcpu_num=0U;
int bsp_cpu_id;
uint8_t bsp_lapic_id = 0;
uint8_t *lapic_id_base;