在 2019年01月07日 10:29, Baoquan He 写道:
> On 01/07/19 at 09:47am, Lianbo Jiang wrote:
>> For AMD machine with SME feature, makedumpfile tools need to know
>> whether the crash kernel was encrypted or not. If SME is enabled
> ^ crashed
>> in the first kernel, the crash kernel's page table(pgd/pud/pmd/pte)
> ^ crashed
>> contains the memory encryption mask, so need to remove the sme mask
> "makedumpfile needs" or
> in makedumpfile need to remove...
Thanks for your comment.
This will be modified in next post.
Regards,
Lianbo
>> to obtain the true physical address.
>>
>> Signed-off-by: Lianbo Jiang <lijiang@xxxxxxxxxx>
>> ---
>> arch/x86/kernel/machine_kexec_64.c | 3 +++
>> 1 file changed, 3 insertions(+)
>>
>> diff --git a/arch/x86/kernel/machine_kexec_64.c b/arch/x86/kernel/machine_kexec_64.c
>> index 4c8acdfdc5a7..bc4108096b18 100644
>> --- a/arch/x86/kernel/machine_kexec_64.c
>> +++ b/arch/x86/kernel/machine_kexec_64.c
>> @@ -352,10 +352,13 @@ void machine_kexec(struct kimage *image)
>>
>> void arch_crash_save_vmcoreinfo(void)
>> {
>> + u64 sme_mask = sme_me_mask;
>> +
>> VMCOREINFO_NUMBER(phys_base);
>> VMCOREINFO_SYMBOL(init_top_pgt);
>> vmcoreinfo_append_str("NUMBER(pgtable_l5_enabled)=%d\n",
>> pgtable_l5_enabled());
>> + VMCOREINFO_NUMBER(sme_mask);
>>
>> #ifdef CONFIG_NUMA
>> VMCOREINFO_SYMBOL(node_data);
>> --
>> 2.17.1
>>
