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x86/sev: Take NUMA node into account when allocating memory for per-CPU SEV data

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per-CPU SEV data is dominantly accessed from their own local CPUs,
so allocate them node-local to improve performance.

Signed-off-by: Li RongQing <lirongqing@baidu.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Nikunj A Dadhania <nikunj@amd.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Link: https://lore.kernel.org/r/20240412030130.49704-1-lirongqing@baidu.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Li RongQing 2024-04-12 11:01:30 +08:00 committed by Ingo Molnar
parent 21f546a43a
commit 90167e9658
1 changed files with 4 additions and 4 deletions
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8
arch/x86/kernel/sev.c
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@ -938,7 +938,7 @@ static int snp_set_vmsa(void *va, bool vmsa)
#define INIT_LDTR_ATTRIBS (SVM_SELECTOR_P_MASK | 2)
#define INIT_TR_ATTRIBS (SVM_SELECTOR_P_MASK | 3)
static void *snp_alloc_vmsa_page(void)
static void *snp_alloc_vmsa_page(int cpu)
{
struct page *p;
@ -950,7 +950,7 @@ static void *snp_alloc_vmsa_page(void)
*
* Allocate an 8k page which is also 8k-aligned.
*/
p = alloc_pages(GFP_KERNEL_ACCOUNT | __GFP_ZERO, 1);
p = alloc_pages_node(cpu_to_node(cpu), GFP_KERNEL_ACCOUNT | __GFP_ZERO, 1);
if (!p)
return NULL;
@ -1019,7 +1019,7 @@ static int wakeup_cpu_via_vmgexit(u32 apic_id, unsigned long start_ip)
* #VMEXIT of that vCPU would wipe out all of the settings being done
* here.
*/
vmsa = (struct sev_es_save_area *)snp_alloc_vmsa_page();
vmsa = (struct sev_es_save_area *)snp_alloc_vmsa_page(cpu);
if (!vmsa)
return -ENOMEM;
@ -1341,7 +1341,7 @@ static void __init alloc_runtime_data(int cpu)
{
struct sev_es_runtime_data *data;
data = memblock_alloc(sizeof(*data), PAGE_SIZE);
data = memblock_alloc_node(sizeof(*data), PAGE_SIZE, cpu_to_node(cpu));
if (!data)
panic("Can't allocate SEV-ES runtime data");