xen: allocate level1_ident_pgt (764f0138) · Commits · e / devices / android_kernel_fairphone_FP4

arch/x86/xen/mmu.c

+6 −2

Original line number	Diff line number	Diff line
		@@ -138,7 +138,8 @@ static inline void check_zero(void)
		* large enough to allocate page table pages to allocate the rest.
		* Each page can map 2MB.
		*/
		static pte_t level1_ident_pgt[PTRS_PER_PTE * 4] __page_aligned_bss;
		#define LEVEL1_IDENT_ENTRIES (PTRS_PER_PTE * 4)
		static RESERVE_BRK_ARRAY(pte_t, level1_ident_pgt, LEVEL1_IDENT_ENTRIES);

		#ifdef CONFIG_X86_64
		/* l3 pud for userspace vsyscall mapping */
		@@ -1718,6 +1719,9 @@ static __init void xen_map_identity_early(pmd_t *pmd, unsigned long max_pfn)
		unsigned ident_pte;
		unsigned long pfn;

		level1_ident_pgt = extend_brk(sizeof(pte_t) * LEVEL1_IDENT_ENTRIES,
		PAGE_SIZE);

		ident_pte = 0;
		pfn = 0;
		for (pmdidx = 0; pmdidx < PTRS_PER_PMD && pfn < max_pfn; pmdidx++) {
		@@ -1728,7 +1732,7 @@ static __init void xen_map_identity_early(pmd_t *pmd, unsigned long max_pfn)
		pte_page = m2v(pmd[pmdidx].pmd);
		else {
		/* Check for free pte pages */
		if (ident_pte == ARRAY_SIZE(level1_ident_pgt))
		if (ident_pte == LEVEL1_IDENT_ENTRIES)
		break;

		pte_page = &level1_ident_pgt[ident_pte];