When a page triggers a machine check, it only reports the physical address of EPC page. But in order to inject #MC into hypervisor, the virtual address is required. Then repurpose the "owner" field as the virtual address of the virtual EPC page so that arch_memory_failure() can easily retrieve it. The EPC page flag - SGX_EPC_PAGE_KVM_GUEST to interpret the meaning of the field. Signed-off-by: Zhiquan Li <zhiquan1.li@xxxxxxxxx> --- Changes since V2: - Rework the patch suggested by Jarkko. - Remove struct sgx_vepc_page and relevant code. - Remove new EPC page flag SGX_EPC_PAGE_IS_VEPC definition as it is duplicated to SGX_EPC_PAGE_KVM_GUEST. Link: https://lore.kernel.org/linux-sgx/eb95b32ecf3d44a695610cf7f2816785@xxxxxxxxx/T/#u Changes since V1: - Add documentation suggested by Jarkko. --- arch/x86/kernel/cpu/sgx/virt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kernel/cpu/sgx/virt.c b/arch/x86/kernel/cpu/sgx/virt.c index 8c7c1d0451c2..776ae5c1c032 100644 --- a/arch/x86/kernel/cpu/sgx/virt.c +++ b/arch/x86/kernel/cpu/sgx/virt.c @@ -46,7 +46,7 @@ static int __sgx_vepc_fault(struct sgx_vepc *vepc, if (epc_page) return 0; - epc_page = sgx_alloc_epc_page(vepc, false); + epc_page = sgx_alloc_epc_page((void *)addr, false); if (IS_ERR(epc_page)) return PTR_ERR(epc_page); -- 2.25.1
