Re: [PATCH Part1 RFC v4 12/36] x86/sev: Add helper for validating pages in early enc attribute changes

On Wed, Jul 07, 2021 at 01:14:42PM -0500, Brijesh Singh wrote:

+void __init early_snp_set_memory_private(unsigned long vaddr, unsigned long paddr,
+					 unsigned int npages)
+{
+	if (!sev_feature_enabled(SEV_SNP))
+		return;
+
+	 /* Ask hypervisor to add the memory pages in RMP table as a 'private'. */

From a previous review:

	Ask the hypervisor to mark the memory pages as private in the RMP table.

Are you missing my comments, do I have to write them more prominently or
what is the problem?

DO I NEED TO WRITE IN CAPS ONLY MAYBE?

+void __init early_snp_set_memory_shared(unsigned long vaddr, unsigned long paddr,
+					unsigned int npages)
+{
+	if (!sev_feature_enabled(SEV_SNP))
+		return;
+
+	/*
+	 * Invalidate the memory pages before they are marked shared in the
+	 * RMP table.
+	 */
+	pvalidate_pages(vaddr, npages, 0);
+
+	 /* Ask hypervisor to make the memory pages shared in the RMP table. */

From a previous review:

s/make/mark/

+	early_set_page_state(paddr, npages, SNP_PAGE_STATE_SHARED);
+}
+
+void __init snp_prep_memory(unsigned long paddr, unsigned int sz, int op)

that op should be:

enum psc_op {
        SNP_PAGE_STATE_SHARED,
        SNP_PAGE_STATE_PRIVATE,
};

too.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette