[15/33] s390: Convert various gmap functions to use ptdescs

Message ID	20230417205048.15870-16-vishal.moola@gmail.com (mailing list archive)
State	New, archived
Headers	show Return-Path: <kvm-owner@vger.kernel.org> From: "Vishal Moola (Oracle)" <vishal.moola@gmail.com> To: Andrew Morton <akpm@linux-foundation.org>, Matthew Wilcox <willy@infradead.org> Cc: linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-openrisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, xen-devel@lists.xenproject.org, kvm@vger.kernel.org, "Vishal Moola (Oracle)" <vishal.moola@gmail.com> Subject: [PATCH 15/33] s390: Convert various gmap functions to use ptdescs Date: Mon, 17 Apr 2023 13:50:30 -0700 Message-Id: <20230417205048.15870-16-vishal.moola@gmail.com> In-Reply-To: <20230417205048.15870-1-vishal.moola@gmail.com> References: <20230417205048.15870-1-vishal.moola@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk
Series	Split ptdesc from struct page \| expand [00/33] Split ptdesc from struct page [01/33] s390: Use _pt_s390_gaddr for gmap address tracking [02/33] s390: Use pt_frag_refcount for pagetables [03/33] pgtable: Create struct ptdesc [04/33] mm: add utility functions for ptdesc [05/33] mm: Convert pmd_pgtable_page() to pmd_ptdesc() [06/33] mm: Convert ptlock_alloc() to use ptdescs [07/33] mm: Convert ptlock_ptr() to use ptdescs [08/33] mm: Convert pmd_ptlock_init() to use ptdescs [09/33] mm: Convert ptlock_init() to use ptdescs [10/33] mm: Convert pmd_ptlock_free() to use ptdescs [11/33] mm: Convert ptlock_free() to use ptdescs [12/33] mm: Create ptdesc equivalents for pgtable_{pte,pmd}_page_{ctor,dtor} [13/33] powerpc: Convert various functions to use ptdescs [14/33] x86: Convert various functions to use ptdescs [15/33] s390: Convert various gmap functions to use ptdescs [16/33] s390: Convert various pgalloc functions to use ptdescs [17/33] mm: Remove page table members from struct page [18/33] pgalloc: Convert various functions to use ptdescs [19/33] arm: Convert various functions to use ptdescs [20/33] arm64: Convert various functions to use ptdescs [21/33] csky: Convert __pte_free_tlb() to use ptdescs [22/33] hexagon: Convert __pte_free_tlb() to use ptdescs [23/33] loongarch: Convert various functions to use ptdescs [24/33] m68k: Convert various functions to use ptdescs [25/33] mips: Convert various functions to use ptdescs [26/33] nios2: Convert __pte_free_tlb() to use ptdescs [27/33] openrisc: Convert __pte_free_tlb() to use ptdescs [28/33] riscv: Convert alloc_{pmd, pte}_late() to use ptdescs [29/33] sh: Convert pte_free_tlb() to use ptdescs [30/33] sparc64: Convert various functions to use ptdescs [31/33] sparc: Convert pgtable_pte_page_{ctor, dtor}() to ptdesc equivalents [32/33] um: Convert {pmd, pte}_free_tlb() to use ptdescs [33/33] mm: Remove pgtable_{pmd, pte}_page_{ctor, dtor}() wrappers

diff --git a/arch/s390/mm/gmap.c b/arch/s390/mm/gmap.c index a61ea1a491dc..9c6ea1d16e09 100644 --- a/arch/s390/mm/gmap.c +++ b/arch/s390/mm/gmap.c @@ -34,7 +34,7 @@ static struct gmap *gmap_alloc(unsigned long limit) { struct gmap *gmap; - struct page *page; + struct ptdesc *ptdesc; unsigned long *table; unsigned long etype, atype; @@ -67,12 +67,12 @@ static struct gmap *gmap_alloc(unsigned long limit) spin_lock_init(&gmap->guest_table_lock); spin_lock_init(&gmap->shadow_lock); refcount_set(&gmap->ref_count, 1); - page = alloc_pages(GFP_KERNEL_ACCOUNT, CRST_ALLOC_ORDER); - if (!page) + ptdesc = ptdesc_alloc(GFP_KERNEL_ACCOUNT, CRST_ALLOC_ORDER); + if (!ptdesc) goto out_free; - page->_pt_s390_gaddr = 0; - list_add(&page->lru, &gmap->crst_list); - table = page_to_virt(page); + ptdesc->_pt_s390_gaddr = 0; + list_add(&ptdesc->pt_list, &gmap->crst_list); + table = ptdesc_to_virt(ptdesc); crst_table_init(table, etype); gmap->table = table; gmap->asce = atype | _ASCE_TABLE_LENGTH | @@ -181,25 +181,25 @@ static void gmap_rmap_radix_tree_free(struct radix_tree_root *root) */ static void gmap_free(struct gmap *gmap) { - struct page *page, *next; + struct ptdesc *ptdesc, *next; /* Flush tlb of all gmaps (if not already done for shadows) */ if (!(gmap_is_shadow(gmap) && gmap->removed)) gmap_flush_tlb(gmap); /* Free all segment & region tables. */ - list_for_each_entry_safe(page, next, &gmap->crst_list, lru) { - page->_pt_s390_gaddr = 0; - __free_pages(page, CRST_ALLOC_ORDER); + list_for_each_entry_safe(ptdesc, next, &gmap->crst_list, pt_list) { + ptdesc->_pt_s390_gaddr = 0; + ptdesc_free(ptdesc); } gmap_radix_tree_free(&gmap->guest_to_host); gmap_radix_tree_free(&gmap->host_to_guest); /* Free additional data for a shadow gmap */ if (gmap_is_shadow(gmap)) { - /* Free all page tables. */ - list_for_each_entry_safe(page, next, &gmap->pt_list, lru) { - page->_pt_s390_gaddr = 0; - page_table_free_pgste(page); + /* Free all ptdesc tables. */ + list_for_each_entry_safe(ptdesc, next, &gmap->pt_list, pt_list) { + ptdesc->_pt_s390_gaddr = 0; + page_table_free_pgste(ptdesc_page(ptdesc)); } gmap_rmap_radix_tree_free(&gmap->host_to_rmap); /* Release reference to the parent */ @@ -308,27 +308,27 @@ EXPORT_SYMBOL_GPL(gmap_get_enabled); static int gmap_alloc_table(struct gmap *gmap, unsigned long *table, unsigned long init, unsigned long gaddr) { - struct page *page; + struct ptdesc *ptdesc; unsigned long *new; /* since we dont free the gmap table until gmap_free we can unlock */ - page = alloc_pages(GFP_KERNEL_ACCOUNT, CRST_ALLOC_ORDER); - if (!page) + ptdesc = ptdesc_alloc(GFP_KERNEL_ACCOUNT, CRST_ALLOC_ORDER); + if (!ptdesc) return -ENOMEM; - new = page_to_virt(page); + new = ptdesc_to_virt(ptdesc); crst_table_init(new, init); spin_lock(&gmap->guest_table_lock); if (*table & _REGION_ENTRY_INVALID) { - list_add(&page->lru, &gmap->crst_list); + list_add(&ptdesc->pt_list, &gmap->crst_list); *table = __pa(new) | _REGION_ENTRY_LENGTH | (*table & _REGION_ENTRY_TYPE_MASK); - page->_pt_s390_gaddr = gaddr; - page = NULL; + ptdesc->_pt_s390_gaddr = gaddr; + ptdesc = NULL; } spin_unlock(&gmap->guest_table_lock); - if (page) { - page->_pt_s390_gaddr = 0; - __free_pages(page, CRST_ALLOC_ORDER); + if (ptdesc) { + ptdesc->_pt_s390_gaddr = 0; + ptdesc_free(ptdesc); } return 0; } @@ -341,13 +341,13 @@ static int gmap_alloc_table(struct gmap *gmap, unsigned long *table, */ static unsigned long __gmap_segment_gaddr(unsigned long *entry) { - struct page *page; + struct ptdesc *ptdesc; unsigned long offset; offset = (unsigned long) entry / sizeof(unsigned long); offset = (offset & (PTRS_PER_PMD - 1)) * PMD_SIZE; - page = pmd_pgtable_page((pmd_t *) entry); - return page->_pt_s390_gaddr + offset; + ptdesc = pmd_ptdesc((pmd_t *) entry); + return ptdesc->_pt_s390_gaddr + offset; } /** @@ -1343,6 +1343,7 @@ static void gmap_unshadow_pgt(struct gmap *sg, unsigned long raddr) unsigned long *ste; phys_addr_t sto, pgt; struct page *page; + struct ptdesc *ptdesc; BUG_ON(!gmap_is_shadow(sg)); ste = gmap_table_walk(sg, raddr, 1); /* get segment pointer */ @@ -1356,9 +1357,11 @@ static void gmap_unshadow_pgt(struct gmap *sg, unsigned long raddr) __gmap_unshadow_pgt(sg, raddr, __va(pgt)); /* Free page table */ page = phys_to_page(pgt); - list_del(&page->lru); - page->_pt_s390_gaddr = 0; - page_table_free_pgste(page); + + page_ptdesc(page); + list_del(&ptdesc->pt_list); + ptdesc->_pt_s390_gaddr = 0; + page_table_free_pgste(ptdesc_page(ptdesc)); } /** @@ -1372,9 +1375,10 @@ static void gmap_unshadow_pgt(struct gmap *sg, unsigned long raddr) static void __gmap_unshadow_sgt(struct gmap *sg, unsigned long raddr, unsigned long *sgt) { - struct page *page; phys_addr_t pgt; int i; + struct page *page; + struct ptdesc *ptdesc; BUG_ON(!gmap_is_shadow(sg)); for (i = 0; i < _CRST_ENTRIES; i++, raddr += _SEGMENT_SIZE) { @@ -1385,9 +1389,11 @@ static void __gmap_unshadow_sgt(struct gmap *sg, unsigned long raddr, __gmap_unshadow_pgt(sg, raddr, __va(pgt)); /* Free page table */ page = phys_to_page(pgt); - list_del(&page->lru); - page->_pt_s390_gaddr = 0; - page_table_free_pgste(page); + + page_ptdesc(page); + list_del(&ptdesc->pt_list); + ptdesc->_pt_s390_gaddr = 0; + page_table_free_pgste(ptdesc_page(ptdesc)); } } @@ -1403,6 +1409,7 @@ static void gmap_unshadow_sgt(struct gmap *sg, unsigned long raddr) unsigned long r3o, *r3e; phys_addr_t sgt; struct page *page; + struct ptdesc *ptdesc; BUG_ON(!gmap_is_shadow(sg)); r3e = gmap_table_walk(sg, raddr, 2); /* get region-3 pointer */ @@ -1416,9 +1423,11 @@ static void gmap_unshadow_sgt(struct gmap *sg, unsigned long raddr) __gmap_unshadow_sgt(sg, raddr, __va(sgt)); /* Free segment table */ page = phys_to_page(sgt); - list_del(&page->lru); - page->_pt_s390_gaddr = 0; - __free_pages(page, CRST_ALLOC_ORDER); + + page_ptdesc(page); + list_del(&ptdesc->pt_list); + ptdesc->_pt_s390_gaddr = 0; + ptdesc_free(ptdesc); } /** @@ -1432,9 +1441,10 @@ static void gmap_unshadow_sgt(struct gmap *sg, unsigned long raddr) static void __gmap_unshadow_r3t(struct gmap *sg, unsigned long raddr, unsigned long *r3t) { - struct page *page; phys_addr_t sgt; int i; + struct page *page; + struct ptdesc *ptdesc; BUG_ON(!gmap_is_shadow(sg)); for (i = 0; i < _CRST_ENTRIES; i++, raddr += _REGION3_SIZE) { @@ -1445,9 +1455,11 @@ static void __gmap_unshadow_r3t(struct gmap *sg, unsigned long raddr, __gmap_unshadow_sgt(sg, raddr, __va(sgt)); /* Free segment table */ page = phys_to_page(sgt); - list_del(&page->lru); - page->_pt_s390_gaddr = 0; - __free_pages(page, CRST_ALLOC_ORDER); + + page_ptdesc(page); + list_del(&ptdesc->pt_list); + ptdesc->_pt_s390_gaddr = 0; + ptdesc_free(ptdesc); } } @@ -1463,6 +1475,7 @@ static void gmap_unshadow_r3t(struct gmap *sg, unsigned long raddr) unsigned long r2o, *r2e; phys_addr_t r3t; struct page *page; + struct ptdesc *ptdesc; BUG_ON(!gmap_is_shadow(sg)); r2e = gmap_table_walk(sg, raddr, 3); /* get region-2 pointer */ @@ -1476,9 +1489,11 @@ static void gmap_unshadow_r3t(struct gmap *sg, unsigned long raddr) __gmap_unshadow_r3t(sg, raddr, __va(r3t)); /* Free region 3 table */ page = phys_to_page(r3t); - list_del(&page->lru); - page->_pt_s390_gaddr = 0; - __free_pages(page, CRST_ALLOC_ORDER); + + page_ptdesc(page); + list_del(&ptdesc->pt_list); + ptdesc->_pt_s390_gaddr = 0; + ptdesc_free(ptdesc); } /** @@ -1493,8 +1508,9 @@ static void __gmap_unshadow_r2t(struct gmap *sg, unsigned long raddr, unsigned long *r2t) { phys_addr_t r3t; - struct page *page; int i; + struct page *page; + struct ptdesc *ptdesc; BUG_ON(!gmap_is_shadow(sg)); for (i = 0; i < _CRST_ENTRIES; i++, raddr += _REGION2_SIZE) { @@ -1505,9 +1521,11 @@ static void __gmap_unshadow_r2t(struct gmap *sg, unsigned long raddr, __gmap_unshadow_r3t(sg, raddr, __va(r3t)); /* Free region 3 table */ page = phys_to_page(r3t); - list_del(&page->lru); - page->_pt_s390_gaddr = 0; - __free_pages(page, CRST_ALLOC_ORDER); + + page_ptdesc(page); + list_del(&ptdesc->pt_list); + ptdesc->_pt_s390_gaddr = 0; + ptdesc_free(ptdesc); } } @@ -1523,6 +1541,7 @@ static void gmap_unshadow_r2t(struct gmap *sg, unsigned long raddr) unsigned long r1o, *r1e; struct page *page; phys_addr_t r2t; + struct ptdesc *ptdesc; BUG_ON(!gmap_is_shadow(sg)); r1e = gmap_table_walk(sg, raddr, 4); /* get region-1 pointer */ @@ -1536,9 +1555,11 @@ static void gmap_unshadow_r2t(struct gmap *sg, unsigned long raddr) __gmap_unshadow_r2t(sg, raddr, __va(r2t)); /* Free region 2 table */ page = phys_to_page(r2t); - list_del(&page->lru); - page->_pt_s390_gaddr = 0; - __free_pages(page, CRST_ALLOC_ORDER); + + page_ptdesc(page); + list_del(&ptdesc->pt_list); + ptdesc->_pt_s390_gaddr = 0; + ptdesc_free(ptdesc); } /** @@ -1556,6 +1577,7 @@ static void __gmap_unshadow_r1t(struct gmap *sg, unsigned long raddr, struct page *page; phys_addr_t r2t; int i; + struct ptdesc *ptdesc; BUG_ON(!gmap_is_shadow(sg)); asce = __pa(r1t) | _ASCE_TYPE_REGION1; @@ -1569,9 +1591,11 @@ static void __gmap_unshadow_r1t(struct gmap *sg, unsigned long raddr, r1t[i] = _REGION1_ENTRY_EMPTY; /* Free region 2 table */ page = phys_to_page(r2t); - list_del(&page->lru); - page->_pt_s390_gaddr = 0; - __free_pages(page, CRST_ALLOC_ORDER); + + page_ptdesc(page); + list_del(&ptdesc->pt_list); + ptdesc->_pt_s390_gaddr = 0; + ptdesc_free(ptdesc); } } @@ -1768,18 +1792,18 @@ int gmap_shadow_r2t(struct gmap *sg, unsigned long saddr, unsigned long r2t, unsigned long raddr, origin, offset, len; unsigned long *table; phys_addr_t s_r2t; - struct page *page; + struct ptdesc *ptdesc; int rc; BUG_ON(!gmap_is_shadow(sg)); /* Allocate a shadow region second table */ - page = alloc_pages(GFP_KERNEL_ACCOUNT, CRST_ALLOC_ORDER); - if (!page) + ptdesc = ptdesc_alloc(GFP_KERNEL_ACCOUNT, CRST_ALLOC_ORDER); + if (!ptdesc) return -ENOMEM; - page->_pt_s390_gaddr = r2t & _REGION_ENTRY_ORIGIN; + ptdesc->_pt_s390_gaddr = r2t & _REGION_ENTRY_ORIGIN; if (fake) - page->_pt_s390_gaddr |= GMAP_SHADOW_FAKE_TABLE; - s_r2t = page_to_phys(page); + ptdesc->_pt_s390_gaddr |= GMAP_SHADOW_FAKE_TABLE; + s_r2t = page_to_phys(ptdesc_page(ptdesc)); /* Install shadow region second table */ spin_lock(&sg->guest_table_lock); table = gmap_table_walk(sg, saddr, 4); /* get region-1 pointer */ @@ -1800,7 +1824,7 @@ int gmap_shadow_r2t(struct gmap *sg, unsigned long saddr, unsigned long r2t, _REGION_ENTRY_TYPE_R1 | _REGION_ENTRY_INVALID; if (sg->edat_level >= 1) *table |= (r2t & _REGION_ENTRY_PROTECT); - list_add(&page->lru, &sg->crst_list); + list_add(&ptdesc->pt_list, &sg->crst_list); if (fake) { /* nothing to protect for fake tables */ *table &= ~_REGION_ENTRY_INVALID; @@ -1828,8 +1852,8 @@ int gmap_shadow_r2t(struct gmap *sg, unsigned long saddr, unsigned long r2t, return rc; out_free: spin_unlock(&sg->guest_table_lock); - page->_pt_s390_gaddr = 0; - __free_pages(page, CRST_ALLOC_ORDER); + ptdesc->_pt_s390_gaddr = 0; + ptdesc_free(ptdesc); return rc; } EXPORT_SYMBOL_GPL(gmap_shadow_r2t); @@ -1853,18 +1877,18 @@ int gmap_shadow_r3t(struct gmap *sg, unsigned long saddr, unsigned long r3t, unsigned long raddr, origin, offset, len; unsigned long *table; phys_addr_t s_r3t; - struct page *page; + struct ptdesc *ptdesc; int rc; BUG_ON(!gmap_is_shadow(sg)); /* Allocate a shadow region second table */ - page = alloc_pages(GFP_KERNEL_ACCOUNT, CRST_ALLOC_ORDER); - if (!page) + ptdesc = ptdesc_alloc(GFP_KERNEL_ACCOUNT, CRST_ALLOC_ORDER); + if (!ptdesc) return -ENOMEM; - page->_pt_s390_gaddr = r3t & _REGION_ENTRY_ORIGIN; + ptdesc->_pt_s390_gaddr = r3t & _REGION_ENTRY_ORIGIN; if (fake) - page->_pt_s390_gaddr |= GMAP_SHADOW_FAKE_TABLE; - s_r3t = page_to_phys(page); + ptdesc->_pt_s390_gaddr |= GMAP_SHADOW_FAKE_TABLE; + s_r3t = page_to_phys(ptdesc); /* Install shadow region second table */ spin_lock(&sg->guest_table_lock); table = gmap_table_walk(sg, saddr, 3); /* get region-2 pointer */ @@ -1885,7 +1909,7 @@ int gmap_shadow_r3t(struct gmap *sg, unsigned long saddr, unsigned long r3t, _REGION_ENTRY_TYPE_R2 | _REGION_ENTRY_INVALID; if (sg->edat_level >= 1) *table |= (r3t & _REGION_ENTRY_PROTECT); - list_add(&page->lru, &sg->crst_list); + list_add(&ptdesc->pt_list, &sg->crst_list); if (fake) { /* nothing to protect for fake tables */ *table &= ~_REGION_ENTRY_INVALID; @@ -1913,8 +1937,8 @@ int gmap_shadow_r3t(struct gmap *sg, unsigned long saddr, unsigned long r3t, return rc; out_free: spin_unlock(&sg->guest_table_lock); - page->_pt_s390_gaddr = 0; - __free_pages(page, CRST_ALLOC_ORDER); + ptdesc->_pt_s390_gaddr = 0; + ptdesc_free(ptdesc); return rc; } EXPORT_SYMBOL_GPL(gmap_shadow_r3t); @@ -1938,18 +1962,18 @@ int gmap_shadow_sgt(struct gmap *sg, unsigned long saddr, unsigned long sgt, unsigned long raddr, origin, offset, len; unsigned long *table; phys_addr_t s_sgt; - struct page *page; + struct ptdesc *ptdesc; int rc; BUG_ON(!gmap_is_shadow(sg) || (sgt & _REGION3_ENTRY_LARGE)); /* Allocate a shadow segment table */ - page = alloc_pages(GFP_KERNEL_ACCOUNT, CRST_ALLOC_ORDER); - if (!page) + ptdesc = ptdesc_alloc(GFP_KERNEL_ACCOUNT, CRST_ALLOC_ORDER); + if (!ptdesc) return -ENOMEM; - page->_pt_s390_gaddr = sgt & _REGION_ENTRY_ORIGIN; + ptdesc->_pt_s390_gaddr = sgt & _REGION_ENTRY_ORIGIN; if (fake) - page->_pt_s390_gaddr |= GMAP_SHADOW_FAKE_TABLE; - s_sgt = page_to_phys(page); + ptdesc->_pt_s390_gaddr |= GMAP_SHADOW_FAKE_TABLE; + s_sgt = page_to_phys(ptdesc); /* Install shadow region second table */ spin_lock(&sg->guest_table_lock); table = gmap_table_walk(sg, saddr, 2); /* get region-3 pointer */ @@ -1970,7 +1994,7 @@ int gmap_shadow_sgt(struct gmap *sg, unsigned long saddr, unsigned long sgt, _REGION_ENTRY_TYPE_R3 | _REGION_ENTRY_INVALID; if (sg->edat_level >= 1) *table |= sgt & _REGION_ENTRY_PROTECT; - list_add(&page->lru, &sg->crst_list); + list_add(&ptdesc->pt_list, &sg->crst_list); if (fake) { /* nothing to protect for fake tables */ *table &= ~_REGION_ENTRY_INVALID; @@ -1998,8 +2022,8 @@ int gmap_shadow_sgt(struct gmap *sg, unsigned long saddr, unsigned long sgt, return rc; out_free: spin_unlock(&sg->guest_table_lock); - page->_pt_s390_gaddr = 0; - __free_pages(page, CRST_ALLOC_ORDER); + ptdesc->_pt_s390_gaddr = 0; + ptdesc_free(ptdesc); return rc; } EXPORT_SYMBOL_GPL(gmap_shadow_sgt); @@ -2022,8 +2046,9 @@ int gmap_shadow_pgt_lookup(struct gmap *sg, unsigned long saddr, int *fake) { unsigned long *table; - struct page *page; int rc; + struct page *page; + struct ptdesc *ptdesc; BUG_ON(!gmap_is_shadow(sg)); spin_lock(&sg->guest_table_lock); @@ -2031,9 +2056,10 @@ int gmap_shadow_pgt_lookup(struct gmap *sg, unsigned long saddr, if (table && !(*table & _SEGMENT_ENTRY_INVALID)) { /* Shadow page tables are full pages (pte+pgste) */ page = pfn_to_page(*table >> PAGE_SHIFT); - *pgt = page->_pt_s390_gaddr & ~GMAP_SHADOW_FAKE_TABLE; + ptdesc = page_ptdesc(page); + *pgt = ptdesc->_pt_s390_gaddr & ~GMAP_SHADOW_FAKE_TABLE; *dat_protection = !!(*table & _SEGMENT_ENTRY_PROTECT); - *fake = !!(page->_pt_s390_gaddr & GMAP_SHADOW_FAKE_TABLE); + *fake = !!(ptdesc->_pt_s390_gaddr & GMAP_SHADOW_FAKE_TABLE); rc = 0; } else { rc = -EAGAIN; @@ -2062,19 +2088,19 @@ int gmap_shadow_pgt(struct gmap *sg, unsigned long saddr, unsigned long pgt, { unsigned long raddr, origin; unsigned long *table; - struct page *page; + struct ptdesc *ptdesc; phys_addr_t s_pgt; int rc; BUG_ON(!gmap_is_shadow(sg) || (pgt & _SEGMENT_ENTRY_LARGE)); /* Allocate a shadow page table */ - page = page_table_alloc_pgste(sg->mm); - if (!page) + ptdesc = page_ptdesc(page_table_alloc_pgste(sg->mm)); + if (!ptdesc) return -ENOMEM; - page->_pt_s390_gaddr = pgt & _SEGMENT_ENTRY_ORIGIN; + ptdesc->_pt_s390_gaddr = pgt & _SEGMENT_ENTRY_ORIGIN; if (fake) - page->_pt_s390_gaddr |= GMAP_SHADOW_FAKE_TABLE; - s_pgt = page_to_phys(page); + ptdesc->_pt_s390_gaddr |= GMAP_SHADOW_FAKE_TABLE; + s_pgt = page_to_phys(ptdesc_page(ptdesc)); /* Install shadow page table */ spin_lock(&sg->guest_table_lock); table = gmap_table_walk(sg, saddr, 1); /* get segment pointer */ @@ -2092,7 +2118,7 @@ int gmap_shadow_pgt(struct gmap *sg, unsigned long saddr, unsigned long pgt, /* mark as invalid as long as the parent table is not protected */ *table = (unsigned long) s_pgt | _SEGMENT_ENTRY | (pgt & _SEGMENT_ENTRY_PROTECT) | _SEGMENT_ENTRY_INVALID; - list_add(&page->lru, &sg->pt_list); + list_add(&ptdesc->pt_list, &sg->pt_list); if (fake) { /* nothing to protect for fake tables */ *table &= ~_SEGMENT_ENTRY_INVALID; @@ -2118,8 +2144,8 @@ int gmap_shadow_pgt(struct gmap *sg, unsigned long saddr, unsigned long pgt, return rc; out_free: spin_unlock(&sg->guest_table_lock); - page->_pt_s390_gaddr = 0; - page_table_free_pgste(page); + ptdesc->_pt_s390_gaddr = 0; + page_table_free_pgste(ptdesc_page(ptdesc)); return rc; } @@ -2823,11 +2849,11 @@ EXPORT_SYMBOL_GPL(__s390_uv_destroy_range); */ void s390_unlist_old_asce(struct gmap *gmap) { - struct page *old; + struct ptdesc *old; - old = virt_to_page(gmap->table); + old = virt_to_ptdesc(gmap->table); spin_lock(&gmap->guest_table_lock); - list_del(&old->lru); + list_del(&old->pt_list); /* * Sometimes the topmost page might need to be "removed" multiple * times, for example if the VM is rebooted into secure mode several @@ -2842,7 +2868,7 @@ void s390_unlist_old_asce(struct gmap *gmap) * pointers, so list_del can work (and do nothing) without * dereferencing stale or invalid pointers. */ - INIT_LIST_HEAD(&old->lru); + INIT_LIST_HEAD(&old->pt_list); spin_unlock(&gmap->guest_table_lock); } EXPORT_SYMBOL_GPL(s390_unlist_old_asce); @@ -2860,15 +2886,15 @@ EXPORT_SYMBOL_GPL(s390_unlist_old_asce); int s390_replace_asce(struct gmap *gmap) { unsigned long asce; - struct page *page; + struct ptdesc *ptdesc; void *table; s390_unlist_old_asce(gmap); - page = alloc_pages(GFP_KERNEL_ACCOUNT, CRST_ALLOC_ORDER); - if (!page) + ptdesc = ptdesc_alloc(GFP_KERNEL_ACCOUNT, CRST_ALLOC_ORDER); + if (!ptdesc) return -ENOMEM; - table = page_to_virt(page); + table = ptdesc_to_virt(ptdesc); memcpy(table, gmap->table, 1UL << (CRST_ALLOC_ORDER + PAGE_SHIFT)); /* @@ -2877,7 +2903,7 @@ int s390_replace_asce(struct gmap *gmap) * it will be freed when the VM is torn down. */ spin_lock(&gmap->guest_table_lock); - list_add(&page->lru, &gmap->crst_list); + list_add(&ptdesc->pt_list, &gmap->crst_list); spin_unlock(&gmap->guest_table_lock); /* Set new table origin while preserving existing ASCE control bits */

[15/33] s390: Convert various gmap functions to use ptdescs

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Patch