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hv: flush cache after update the trampoline code 

Trampoline code is updated as data when preparing the trampoline
code and doing relocation. In this case, we need to flush cache
to make sure the updated code is in RAM.

Tracked-On: #1604
Signed-off-by: Yin Fengwei <fengwei.yin@intel.com>
Reviewed-by: Zide Chen <zide.chen@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
This commit is contained in:
Yin Fengwei 2018-10-25 22:33:57 +08:00 committed by wenlingz
parent 0166ec4b71
commit 3d94f86812
1 changed files with 7 additions and 1 deletions
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8
hypervisor/boot/reloc.c
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@ -157,6 +157,7 @@ void write_trampoline_sym(const void *sym, uint64_t val)
hva = hpa2hva(trampoline_start16_paddr) + trampoline_relo_addr(sym);
*hva = val;
clflush(hva);
}
static void update_trampoline_code_refs(uint64_t dest_pa)
@ -214,7 +215,7 @@ static void update_trampoline_code_refs(uint64_t dest_pa)
uint64_t prepare_trampoline(void)
{
uint64_t size, dest_pa;
uint64_t size, dest_pa, i;
size = (uint64_t)(&ld_trampoline_end - &ld_trampoline_start);
#ifndef CONFIG_EFI_STUB
@ -229,6 +230,11 @@ uint64_t prepare_trampoline(void)
(void)memcpy_s(hpa2hva(dest_pa), (size_t)size, &ld_trampoline_load,
(size_t)size);
update_trampoline_code_refs(dest_pa);
for (i = 0UL; i < size; i = i + CACHE_LINE_SIZE) {
clflush(hpa2hva(dest_pa + i));
}
trampoline_start16_paddr = dest_pa;
return dest_pa;