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

From: Sean Christopherson <seanjc@google.com>
To: Marc Zyngier <maz@kernel.org>, Oliver Upton <oupton@kernel.org>,
	 Sean Christopherson <seanjc@google.com>,
	Paolo Bonzini <pbonzini@redhat.com>,
	 Tianrui Zhao <zhaotianrui@loongson.cn>,
	Bibo Mao <maobibo@loongson.cn>,
	 Huacai Chen <chenhuacai@kernel.org>,
	Anup Patel <anup@brainfault.org>,  Paul Walmsley <pjw@kernel.org>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Albert Ou <aou@eecs.berkeley.edu>,
	 Christian Borntraeger <borntraeger@linux.ibm.com>,
	Janosch Frank <frankja@linux.ibm.com>,
	 Claudio Imbrenda <imbrenda@linux.ibm.com>
Cc: Fuad Tabba <fuad.tabba@linux.dev>,
	Joey Gouly <joey.gouly@arm.com>,
	 Steffen Eiden <seiden@linux.ibm.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	 Zenghui Yu <yuzenghui@huawei.com>,
	Atish Patra <atish.patra@linux.dev>,
	 Alexandre Ghiti <alex@ghiti.fr>,
	David Hildenbrand <david@kernel.org>,
	linux-arm-kernel@lists.infradead.org,  kvmarm@lists.linux.dev,
	kvm@vger.kernel.org, loongarch@lists.linux.dev,
	 kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org,
	 linux-kernel@vger.kernel.org,
	Itaru Kitayama <itaru.kitayama@fujitsu.com>,
	 Nicholas Piggin <npiggin@gmail.com>,
	Ritesh Harjani <ritesh.list@gmail.com>
Subject: [PATCH v2 02/20] KVM: selftests: Use the common minimum GPA for page tables on LoongArch
Date: Wed,  2 Sep 2026 09:41:05 -0700	[thread overview]
Message-ID: <20260902164123.2546762-3-seanjc@google.com> (raw)
In-Reply-To: <20260902164123.2546762-1-seanjc@google.com>

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@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);
-- 
2.55.0.966.g6673acef38-goog


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