[PATCH v2 02/20] KVM: selftests: Use the common minimum GPA for page tables on LoongArch

[Bibo Mao]

On 2026/9/3 上午12:41, Sean Christopherson wrote:
> Use the common minimum GPA for page tables (0x180000) on LoongArch instead
> of LoongArch's custom minimum of 0x200000, so that LoongArch can use
> vm_alloc_page_table() instead of open coding a rough equivalent.  There are
> no known reasons why LoongArch can't use a lower, less-aligned minimum.
> The more-aligned value was originally selected to support huge pages for
> the guest, but that only requires the address of the final allocation to be
> aligned, the addresses of page table pages is irrelevant on that front.
> 
> Signed-off-by: Sean Christopherson <seanjc at google.com>
> ---
>   tools/testing/selftests/kvm/lib/loongarch/processor.c | 3 +--
>   1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/tools/testing/selftests/kvm/lib/loongarch/processor.c b/tools/testing/selftests/kvm/lib/loongarch/processor.c
> index 47bbde3e205a..057a77713542 100644
> --- a/tools/testing/selftests/kvm/lib/loongarch/processor.c
> +++ b/tools/testing/selftests/kvm/lib/loongarch/processor.c
> @@ -9,7 +9,6 @@
>   #include "processor.h"
>   #include "ucall_common.h"
>   
> -#define LOONGARCH_PAGE_TABLE_PHYS_MIN		0x200000
>   #define LOONGARCH_GUEST_STACK_VADDR_MIN		0x200000
>   
>   static gpa_t invalid_pgtable[4];
> @@ -57,7 +56,7 @@ void virt_arch_pgd_alloc(struct kvm_vm *vm)
>   	child = table = 0;
>   	for (i = 0; i < vm->mmu.pgtable_levels; i++) {
>   		invalid_pgtable[i] = child;
> -		table = vm_phy_page_alloc(vm, LOONGARCH_PAGE_TABLE_PHYS_MIN,
> +		table = vm_phy_page_alloc(vm, KVM_GUEST_PAGE_TABLE_MIN_PADDR,
>   				vm->memslots[MEM_REGION_PT]);
>   		TEST_ASSERT(table, "Fail to allocate page tale at level %d\n", i);
>   		virt_set_pgtable(vm, table, child);
> 
Reviewed-by: Bibo Mao <maobibo at loongson.cn>