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[kvm-unit-tests,RFC,11/13] x86 AMD SEV-SNP: Change guest pages from Shared->Private using GHCB NAE

Message ID 20240419125759.242870-12-papaluri@amd.com (mailing list archive)
State New, archived
Headers show
Series Introduce SEV-SNP Support | expand

Commit Message

Paluri, PavanKumar April 19, 2024, 12:57 p.m. UTC 
Perform page state conversions to private on a range of pages that are
already in a hypervisor-owned state.

The test introduces support for both 4K pages as well as 2M large pages
depending on the order specified.

Perform a write operation on the pages while they are shared pages. After
conversion, run a re-validation test on one of the converted pages to
ensure the page state is private.

Signed-off-by: Pavan Kumar Paluri <papaluri@amd.com>
---
 x86/amd_sev.c | 11 +++++++++++
 1 file changed, 11 insertions(+)
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Patch

diff --git a/x86/amd_sev.c b/x86/amd_sev.c
index 1723a235166b..6c6fe8e05adb 100644
--- a/x86/amd_sev.c
+++ b/x86/amd_sev.c
@@ -615,6 +615,17 @@  static void test_sev_psc_ghcb_nae(void)
 	       "Write to %d un-encrypted pages after private->shared conversion",
 	       1 << SNP_PSC_ALLOC_ORDER);
 
+	/* Shared->Private operations */
+	report_info("Shared->Private conversion test using GHCB NAE");
+
+	set_pte_encrypted((unsigned long)vm_pages, 1 << SNP_PSC_ALLOC_ORDER);
+
+	sev_set_pages_state((unsigned long)vm_pages, 1 << SNP_PSC_ALLOC_ORDER,
+			    SNP_PAGE_STATE_PRIVATE, ghcb, large_page);
+
+	report(is_validated_private_page((unsigned long)vm_pages, large_page, true),
+	       "Expected page state: Private");
+
 	/* Cleanup */
 	free_pages_by_order(vm_pages, SNP_PSC_ALLOC_ORDER);
 }