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hv: Prepare the gdt table for VM

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For VMs of partition mode, there is no guarantee 1:1 mapping
between gpa and hpa, we need to copy the native gdt table to
each VM's memory.

Tracked-On: #1565
Signed-off-by: Yin Fengwei <fengwei.yin@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
This commit is contained in:
Yin Fengwei 2018-10-23 15:43:33 +08:00 committed by wenlingz
parent ad1ef7ba1b
commit 4f19b3b875
1 changed files with 20 additions and 0 deletions
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20
hypervisor/common/vm_load.c
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@ -38,6 +38,25 @@ static uint32_t create_e820_table(struct e820_entry *param_e820)
}
#endif
static void prepare_bsp_gdt(struct vm *vm)
{
size_t gdt_len;
uint64_t gdt_base_hpa;
void *gdt_base_hva;
gdt_base_hpa = gpa2hpa(vm, vm0_boot_context.gdt.base);
if (vm0_boot_context.gdt.base == gdt_base_hpa) {
return;
} else {
gdt_base_hva = hpa2hva(gdt_base_hpa);
gdt_len = ((size_t)vm0_boot_context.gdt.limit + 1U)/sizeof(uint8_t);
(void )memcpy_s(gdt_base_hva, gdt_len, hpa2hva(vm0_boot_context.gdt.base), gdt_len);
}
return;
}
static uint64_t create_zero_page(struct vm *vm)
{
struct zero_page *zeropage;
@ -96,6 +115,7 @@ int general_sw_loader(struct vm *vm)
pr_dbg("Loading guest to run-time location");
prepare_bsp_gdt(vm);
set_vcpu_regs(vcpu, &vm0_boot_context);
/* calculate the kernel entry point */