From: Juergen Gross <jgross@suse.com> To: grub-devel@gnu.org Cc: Juergen Gross <jgross@suse.com>, phcoder@gmail.com, daniel.kiper@oracle.com, xen-devel@lists.xen.org, hans@knorrie.org, roger.pau@citrix.com Subject: [PATCH v5 12/20] xen: get memory map from hypervisor for PVH Date: Wed, 21 Nov 2018 15:28:47 +0100 [thread overview] Message-ID: <20181121142855.13537-13-jgross@suse.com> (raw) In-Reply-To: <20181121142855.13537-1-jgross@suse.com> Retrieve the memory map from the hypervisor and normalize it to contain no overlapping entries and to be sorted by address. Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com> --- V3: use grub_e820_mmap_entry instead of own struct (Daniel Kiper) --- grub-core/kern/i386/xen/pvh.c | 94 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 94 insertions(+) diff --git a/grub-core/kern/i386/xen/pvh.c b/grub-core/kern/i386/xen/pvh.c index 478cef0d1..bb90874b3 100644 --- a/grub-core/kern/i386/xen/pvh.c +++ b/grub-core/kern/i386/xen/pvh.c @@ -24,7 +24,12 @@ #include <grub/i386/io.h> #include <grub/xen.h> #include <xen/hvm/start_info.h> +#include <grub/i386/linux.h> #include <grub/machine/kernel.h> +#include <grub/machine/memory.h> +#include <xen/memory.h> + +#define XEN_MEMORY_MAP_SIZE 128 grub_uint64_t grub_rsdp_addr; @@ -32,6 +37,8 @@ static char hypercall_page[GRUB_XEN_PAGE_SIZE] __attribute__ ((aligned (GRUB_XEN_PAGE_SIZE))); static grub_uint32_t xen_cpuid_base; +static struct grub_e820_mmap_entry map[XEN_MEMORY_MAP_SIZE]; +static unsigned int nr_map_entries; static void grub_xen_cons_msg (const char *msg) @@ -103,11 +110,98 @@ grub_xen_hypercall (grub_uint32_t callno, grub_uint32_t a0, return __res; } +static void +grub_xen_sort_mmap (void) +{ + grub_uint64_t from, to; + unsigned int i; + struct grub_e820_mmap_entry tmp; + + /* Align map entries to page boundaries. */ + for (i = 0; i < nr_map_entries; i++) + { + from = map[i].addr; + to = from + map[i].len; + if (map[i].type == GRUB_MEMORY_AVAILABLE) + { + from = ALIGN_UP (from, GRUB_XEN_PAGE_SIZE); + to = ALIGN_DOWN (to, GRUB_XEN_PAGE_SIZE); + } + else + { + from = ALIGN_DOWN (from, GRUB_XEN_PAGE_SIZE); + to = ALIGN_UP (to, GRUB_XEN_PAGE_SIZE); + } + map[i].addr = from; + map[i].len = to - from; + } + + again: + /* Sort entries by start address. */ + for (i = 1; i < nr_map_entries; i++) + { + if (map[i].addr >= map[i - 1].addr) + continue; + tmp = map[i]; + map[i] = map[i - 1]; + map[i - 1] = tmp; + i = 0; + } + + /* Detect overlapping areas. */ + for (i = 1; i < nr_map_entries; i++) + { + if (map[i].addr >= map[i - 1].addr + map[i - 1].len) + continue; + tmp = map[i - 1]; + map[i - 1].len = map[i].addr - map[i - 1].addr; + if (map[i].addr + map[i].len >= tmp.addr + tmp.len) + continue; + if (nr_map_entries < ARRAY_SIZE (map)) + { + map[nr_map_entries].addr = map[i].addr + map[i].len; + map[nr_map_entries].len = tmp.addr + tmp.len - map[nr_map_entries].addr; + map[nr_map_entries].type = tmp.type; + nr_map_entries++; + goto again; + } + } + + /* Merge adjacent entries. */ + for (i = 1; i < nr_map_entries; i++) + { + if (map[i].type == map[i - 1].type && + map[i].addr == map[i - 1].addr + map[i - 1].len) + { + map[i - 1].len += map[i].len; + map[i] = map[nr_map_entries - 1]; + nr_map_entries--; + goto again; + } + } +} + +static void +grub_xen_get_mmap (void) +{ + struct xen_memory_map memmap; + + memmap.nr_entries = ARRAY_SIZE (map); + set_xen_guest_handle (memmap.buffer, map); + if (grub_xen_hypercall (__HYPERVISOR_memory_op, XENMEM_memory_map, + (grub_uint32_t) (&memmap), 0, 0, 0, 0)) + grub_xen_panic ("Could not get memory map from Xen!\n"); + nr_map_entries = memmap.nr_entries; + + grub_xen_sort_mmap (); +} + void grub_xen_setup_pvh (void) { grub_xen_cpuid_base (); grub_xen_setup_hypercall_page (); + grub_xen_get_mmap (); } grub_err_t -- 2.16.4 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
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From: Juergen Gross <jgross@suse.com> To: grub-devel@gnu.org Cc: xen-devel@lists.xen.org, phcoder@gmail.com, daniel.kiper@oracle.com, roger.pau@citrix.com, hans@knorrie.org, Juergen Gross <jgross@suse.com> Subject: [PATCH v5 12/20] xen: get memory map from hypervisor for PVH Date: Wed, 21 Nov 2018 15:28:47 +0100 [thread overview] Message-ID: <20181121142855.13537-13-jgross@suse.com> (raw) In-Reply-To: <20181121142855.13537-1-jgross@suse.com> Retrieve the memory map from the hypervisor and normalize it to contain no overlapping entries and to be sorted by address. Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com> --- V3: use grub_e820_mmap_entry instead of own struct (Daniel Kiper) --- grub-core/kern/i386/xen/pvh.c | 94 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 94 insertions(+) diff --git a/grub-core/kern/i386/xen/pvh.c b/grub-core/kern/i386/xen/pvh.c index 478cef0d1..bb90874b3 100644 --- a/grub-core/kern/i386/xen/pvh.c +++ b/grub-core/kern/i386/xen/pvh.c @@ -24,7 +24,12 @@ #include <grub/i386/io.h> #include <grub/xen.h> #include <xen/hvm/start_info.h> +#include <grub/i386/linux.h> #include <grub/machine/kernel.h> +#include <grub/machine/memory.h> +#include <xen/memory.h> + +#define XEN_MEMORY_MAP_SIZE 128 grub_uint64_t grub_rsdp_addr; @@ -32,6 +37,8 @@ static char hypercall_page[GRUB_XEN_PAGE_SIZE] __attribute__ ((aligned (GRUB_XEN_PAGE_SIZE))); static grub_uint32_t xen_cpuid_base; +static struct grub_e820_mmap_entry map[XEN_MEMORY_MAP_SIZE]; +static unsigned int nr_map_entries; static void grub_xen_cons_msg (const char *msg) @@ -103,11 +110,98 @@ grub_xen_hypercall (grub_uint32_t callno, grub_uint32_t a0, return __res; } +static void +grub_xen_sort_mmap (void) +{ + grub_uint64_t from, to; + unsigned int i; + struct grub_e820_mmap_entry tmp; + + /* Align map entries to page boundaries. */ + for (i = 0; i < nr_map_entries; i++) + { + from = map[i].addr; + to = from + map[i].len; + if (map[i].type == GRUB_MEMORY_AVAILABLE) + { + from = ALIGN_UP (from, GRUB_XEN_PAGE_SIZE); + to = ALIGN_DOWN (to, GRUB_XEN_PAGE_SIZE); + } + else + { + from = ALIGN_DOWN (from, GRUB_XEN_PAGE_SIZE); + to = ALIGN_UP (to, GRUB_XEN_PAGE_SIZE); + } + map[i].addr = from; + map[i].len = to - from; + } + + again: + /* Sort entries by start address. */ + for (i = 1; i < nr_map_entries; i++) + { + if (map[i].addr >= map[i - 1].addr) + continue; + tmp = map[i]; + map[i] = map[i - 1]; + map[i - 1] = tmp; + i = 0; + } + + /* Detect overlapping areas. */ + for (i = 1; i < nr_map_entries; i++) + { + if (map[i].addr >= map[i - 1].addr + map[i - 1].len) + continue; + tmp = map[i - 1]; + map[i - 1].len = map[i].addr - map[i - 1].addr; + if (map[i].addr + map[i].len >= tmp.addr + tmp.len) + continue; + if (nr_map_entries < ARRAY_SIZE (map)) + { + map[nr_map_entries].addr = map[i].addr + map[i].len; + map[nr_map_entries].len = tmp.addr + tmp.len - map[nr_map_entries].addr; + map[nr_map_entries].type = tmp.type; + nr_map_entries++; + goto again; + } + } + + /* Merge adjacent entries. */ + for (i = 1; i < nr_map_entries; i++) + { + if (map[i].type == map[i - 1].type && + map[i].addr == map[i - 1].addr + map[i - 1].len) + { + map[i - 1].len += map[i].len; + map[i] = map[nr_map_entries - 1]; + nr_map_entries--; + goto again; + } + } +} + +static void +grub_xen_get_mmap (void) +{ + struct xen_memory_map memmap; + + memmap.nr_entries = ARRAY_SIZE (map); + set_xen_guest_handle (memmap.buffer, map); + if (grub_xen_hypercall (__HYPERVISOR_memory_op, XENMEM_memory_map, + (grub_uint32_t) (&memmap), 0, 0, 0, 0)) + grub_xen_panic ("Could not get memory map from Xen!\n"); + nr_map_entries = memmap.nr_entries; + + grub_xen_sort_mmap (); +} + void grub_xen_setup_pvh (void) { grub_xen_cpuid_base (); grub_xen_setup_hypercall_page (); + grub_xen_get_mmap (); } grub_err_t -- 2.16.4
next prev parent reply other threads:[~2018-11-21 14:28 UTC|newest] Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-11-21 14:28 [PATCH v5 00/20] xen: add pvh guest support Juergen Gross 2018-11-21 14:28 ` Juergen Gross 2018-11-21 14:28 ` [PATCH v5 01/20] xen: add some xen headers Juergen Gross 2018-11-21 14:28 ` Juergen Gross 2018-11-28 11:31 ` Daniel Kiper 2018-11-28 11:31 ` Daniel Kiper 2018-11-28 11:46 ` Juergen Gross 2018-11-28 11:46 ` Juergen Gross 2018-11-21 14:28 ` [PATCH v5 02/20] loader/linux: support passing rsdp address via boot params Juergen Gross 2018-11-21 14:28 ` Juergen Gross 2018-11-27 19:52 ` Daniel Kiper 2018-11-27 19:52 ` Daniel Kiper 2018-11-21 14:28 ` [PATCH v5 03/20] xen: carve out grant tab initialization into dedicated function Juergen Gross 2018-11-21 14:28 ` Juergen Gross 2018-11-21 14:28 ` [PATCH v5 04/20] xen: prepare common code for Xen PVH support Juergen Gross 2018-11-21 14:28 ` Juergen Gross 2018-11-21 14:28 ` [PATCH v5 05/20] xen: add some dummy headers for PVH mode Juergen Gross 2018-11-21 14:28 ` Juergen Gross 2018-11-27 19:59 ` Daniel Kiper 2018-11-27 19:59 ` Daniel Kiper 2018-11-21 14:28 ` [PATCH v5 06/20] xen: rearrange xen/init.c to prepare it for Xen " Juergen Gross 2018-11-21 14:28 ` Juergen Gross 2018-11-21 14:28 ` [PATCH v5 07/20] xen: modify grub_xen_ptr2mfn() for xen-pvh Juergen Gross 2018-11-27 20:02 ` Daniel Kiper 2018-11-27 20:02 ` Daniel Kiper 2018-11-21 14:28 ` Juergen Gross 2018-11-21 14:28 ` [PATCH v5 08/20] xen: add PVH specific defines to offset.h Juergen Gross 2018-11-21 14:28 ` Juergen Gross 2018-11-21 14:28 ` [PATCH v5 09/20] xen: add basic hooks for PVH in current code Juergen Gross 2018-11-21 14:28 ` Juergen Gross 2018-11-27 20:10 ` Daniel Kiper 2018-11-27 20:10 ` Daniel Kiper 2018-11-21 14:28 ` [PATCH v5 10/20] xen: add PVH boot entry code Juergen Gross 2018-11-21 14:28 ` Juergen Gross 2018-11-21 14:28 ` [PATCH v5 11/20] xen: setup hypercall page for PVH Juergen Gross 2018-11-21 14:28 ` Juergen Gross 2018-11-23 15:14 ` Roger Pau Monné 2018-11-23 15:14 ` Roger Pau Monné 2018-11-27 20:31 ` Daniel Kiper 2018-11-27 20:31 ` Daniel Kiper 2018-11-28 11:28 ` Daniel Kiper 2018-11-28 11:28 ` Daniel Kiper 2018-11-28 11:44 ` Juergen Gross 2018-11-28 11:44 ` Juergen Gross 2018-11-21 14:28 ` Juergen Gross [this message] 2018-11-21 14:28 ` [PATCH v5 12/20] xen: get memory map from hypervisor " Juergen Gross 2018-11-21 14:28 ` [PATCH v5 13/20] xen: setup Xen specific data " Juergen Gross 2018-11-21 14:28 ` Juergen Gross 2018-11-23 15:04 ` Roger Pau Monné 2018-11-23 15:04 ` Roger Pau Monné 2018-11-27 21:10 ` Daniel Kiper 2018-11-27 21:10 ` Daniel Kiper 2018-11-21 14:28 ` [PATCH v5 14/20] xen: init memory regions " Juergen Gross 2018-11-21 14:28 ` Juergen Gross 2018-11-21 14:28 ` [PATCH v5 15/20] xen_pvh: add build runes for grub-core Juergen Gross 2018-11-21 14:28 ` Juergen Gross 2018-11-27 21:17 ` Daniel Kiper 2018-11-27 21:17 ` Daniel Kiper 2018-11-28 11:52 ` Juergen Gross 2018-11-28 11:52 ` Juergen Gross 2018-11-21 14:28 ` [PATCH v5 16/20] grub-module-verifier: Ignore all_video for xenpvh Juergen Gross 2018-11-21 14:28 ` Juergen Gross 2018-11-21 14:28 ` [PATCH v5 17/20] xen: use elfnote defines instead of plain numbers Juergen Gross 2018-11-21 14:28 ` Juergen Gross 2018-11-21 14:28 ` [PATCH v5 18/20] xen_pvh: support building a standalone image Juergen Gross 2018-11-21 14:28 ` Juergen Gross 2018-11-21 14:28 ` [PATCH v5 19/20] xen_pvh: support grub-install for xen_pvh Juergen Gross 2018-11-21 14:28 ` Juergen Gross 2018-11-21 14:28 ` [PATCH v5 20/20] xen_pvh: add support to configure Juergen Gross 2018-11-21 14:28 ` Juergen Gross
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