Commit 90167e96 authored by Li RongQing's avatar Li RongQing Committed by Ingo Molnar
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x86/sev: Take NUMA node into account when allocating memory for per-CPU SEV data 



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

Signed-off-by: default avatarLi RongQing <lirongqing@baidu.com>
Signed-off-by: default avatarIngo 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: default avatarIngo Molnar <mingo@kernel.org>
parent 21f546a4

arch/x86/kernel/sev.c

+4 −4
Original line number Diff line number Diff line
@@ -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");