Introduce install_large_pages() helper similar to install_pages(), that
is helpful while dealing with more than 1 2M large page mappings. This
helper is useful when running SEV-SNP VMGEXIT PSC tests that deal with
a bunch of 2M pages.
Signed-off-by: Pavan Kumar Paluri <papaluri@xxxxxxx>
---
lib/x86/vm.c | 14 ++++++++++++++
lib/x86/vm.h | 1 +
2 files changed, 15 insertions(+)
diff --git a/lib/x86/vm.c b/lib/x86/vm.c
index 078665b2faf4..cfca452bb110 100644
--- a/lib/x86/vm.c
+++ b/lib/x86/vm.c
@@ -128,6 +128,20 @@ void install_pages(pgd_t *cr3, phys_addr_t phys, size_t len, void *virt)
}
}
+void install_large_pages(pgd_t *cr3, phys_addr_t phys, size_t len, void *virt)
+{
+ phys_addr_t max = (u64)len + (u64)phys;
+ assert(phys % LARGE_PAGE_SIZE == 0);
+ assert((uintptr_t)virt % LARGE_PAGE_SIZE == 0);
+ assert(len % LARGE_PAGE_SIZE == 0);
+
+ while (phys + LARGE_PAGE_SIZE <= max) {
+ install_large_page(cr3, phys, virt);
+ phys += LARGE_PAGE_SIZE;
+ virt = (char *)virt + LARGE_PAGE_SIZE;
+ }
+}
+
bool any_present_pages(pgd_t *cr3, void *virt, size_t len)
{
uintptr_t max = (uintptr_t) virt + len;
diff --git a/lib/x86/vm.h b/lib/x86/vm.h
index 9f72c267086d..0216ea1f37f9 100644
--- a/lib/x86/vm.h
+++ b/lib/x86/vm.h
@@ -41,6 +41,7 @@ pteval_t *install_pte(pgd_t *cr3,
pteval_t *install_large_page(pgd_t *cr3, phys_addr_t phys, void *virt);
void install_pages(pgd_t *cr3, phys_addr_t phys, size_t len, void *virt);
+void install_large_pages(pgd_t *cr3, phys_addr_t phys, size_t len, void *virt);
bool any_present_pages(pgd_t *cr3, void *virt, size_t len);
void set_pte_opt_mask(void);
void reset_pte_opt_mask(void);
--
2.34.1
