[RFC PATCH 11/31] KVM: selftests: Skip vm_is_gpa_protected() call for APIC MMIO base

From: Neeraj Upadhyay
Date: Fri Feb 28 2025 - 04:47:19 EST


Skip vm_is_gpa_protected() call for APIC MMIO address in __virt_pg_map().
Without this change, the virt_pg_map() fails with below error for
APIC MMIO address.

No vm physical memory at 0xfee00000

Signed-off-by: Neeraj Upadhyay <Neeraj.Upadhyay@xxxxxxx>
---
tools/testing/selftests/kvm/lib/x86/processor.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/tools/testing/selftests/kvm/lib/x86/processor.c b/tools/testing/selftests/kvm/lib/x86/processor.c
index 7129dfb652c4..197110ff1380 100644
--- a/tools/testing/selftests/kvm/lib/x86/processor.c
+++ b/tools/testing/selftests/kvm/lib/x86/processor.c
@@ -8,6 +8,7 @@
#include "kvm_util.h"
#include "processor.h"
#include "sev.h"
+#include "apic.h"

#ifndef NUM_INTERRUPTS
#define NUM_INTERRUPTS 256
@@ -227,6 +228,11 @@ void __virt_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr, int level)
"PTE already present for 4k page at vaddr: 0x%lx", vaddr);
*pte = PTE_PRESENT_MASK | PTE_WRITABLE_MASK | (paddr & PHYSICAL_PAGE_MASK);

+ if (paddr == APIC_DEFAULT_GPA) {
+ *pte |= vm->arch.s_bit;
+ return;
+ }
+
/*
* Neither SEV nor TDX supports shared page tables, so only the final
* leaf PTE needs manually set the C/S-bit.
--
2.34.1