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Diffstat (limited to 'tools/libxc/xc_hvm_build.c')
-rw-r--r--tools/libxc/xc_hvm_build.c103
1 files changed, 36 insertions, 67 deletions
diff --git a/tools/libxc/xc_hvm_build.c b/tools/libxc/xc_hvm_build.c
index 52e935d3e0..b8bfe0edc7 100644
--- a/tools/libxc/xc_hvm_build.c
+++ b/tools/libxc/xc_hvm_build.c
@@ -56,11 +56,12 @@ static void build_e820map(void *e820_page, unsigned long long mem_size)
unsigned char nr_map = 0;
/*
- * physical address space from HVM_BELOW_4G_RAM_END to 4G is reserved
+ * Physical address space from HVM_BELOW_4G_RAM_END to 4G is reserved
* for PCI devices MMIO. So if HVM has more than HVM_BELOW_4G_RAM_END
* RAM, memory beyond HVM_BELOW_4G_RAM_END will go to 4G above.
*/
- if ( mem_size > HVM_BELOW_4G_RAM_END ) {
+ if ( mem_size > HVM_BELOW_4G_RAM_END )
+ {
extra_mem_size = mem_size - HVM_BELOW_4G_RAM_END;
mem_size = HVM_BELOW_4G_RAM_END;
}
@@ -75,11 +76,6 @@ static void build_e820map(void *e820_page, unsigned long long mem_size)
e820entry[nr_map].type = E820_RESERVED;
nr_map++;
- e820entry[nr_map].addr = 0xA0000;
- e820entry[nr_map].size = 0x20000;
- e820entry[nr_map].type = E820_IO;
- nr_map++;
-
e820entry[nr_map].addr = 0xEA000;
e820entry[nr_map].size = 0x01000;
e820entry[nr_map].type = E820_ACPI;
@@ -90,54 +86,14 @@ static void build_e820map(void *e820_page, unsigned long long mem_size)
e820entry[nr_map].type = E820_RESERVED;
nr_map++;
-/* buffered io page. */
-#define BUFFERED_IO_PAGES 1
-/* xenstore page. */
-#define XENSTORE_PAGES 1
-/* shared io page. */
-#define SHARED_IO_PAGES 1
-/* totally 16 static pages are reserved in E820 table */
-
- /* Most of the ram goes here */
+ /* Low RAM goes here. Remove 3 pages for ioreq, bufioreq, and xenstore. */
e820entry[nr_map].addr = 0x100000;
- e820entry[nr_map].size = mem_size - 0x100000 - PAGE_SIZE *
- (BUFFERED_IO_PAGES +
- XENSTORE_PAGES +
- SHARED_IO_PAGES);
+ e820entry[nr_map].size = mem_size - 0x100000 - PAGE_SIZE * 3;
e820entry[nr_map].type = E820_RAM;
nr_map++;
- /* Statically allocated special pages */
-
- /* For buffered IO requests */
- e820entry[nr_map].addr = mem_size - PAGE_SIZE *
- (BUFFERED_IO_PAGES +
- XENSTORE_PAGES +
- SHARED_IO_PAGES);
- e820entry[nr_map].size = PAGE_SIZE * BUFFERED_IO_PAGES;
- e820entry[nr_map].type = E820_BUFFERED_IO;
- nr_map++;
-
- /* For xenstore */
- e820entry[nr_map].addr = mem_size - PAGE_SIZE *
- (XENSTORE_PAGES +
- SHARED_IO_PAGES);
- e820entry[nr_map].size = PAGE_SIZE * XENSTORE_PAGES;
- e820entry[nr_map].type = E820_XENSTORE;
- nr_map++;
-
- /* Shared ioreq_t page */
- e820entry[nr_map].addr = mem_size - PAGE_SIZE * SHARED_IO_PAGES;
- e820entry[nr_map].size = PAGE_SIZE * SHARED_IO_PAGES;
- e820entry[nr_map].type = E820_SHARED_PAGE;
- nr_map++;
-
- e820entry[nr_map].addr = 0xFEC00000;
- e820entry[nr_map].size = 0x1400000;
- e820entry[nr_map].type = E820_IO;
- nr_map++;
-
- if ( extra_mem_size ) {
+ if ( extra_mem_size )
+ {
e820entry[nr_map].addr = (1ULL << 32);
e820entry[nr_map].size = extra_mem_size;
e820entry[nr_map].type = E820_RAM;
@@ -212,6 +168,7 @@ static int setup_guest(int xc_handle,
void *e820_page;
struct domain_setup_info dsi;
uint64_t v_end;
+ int rc;
memset(&dsi, 0, sizeof(struct domain_setup_info));
@@ -253,13 +210,28 @@ static int setup_guest(int xc_handle,
for ( i = HVM_BELOW_4G_RAM_END >> PAGE_SHIFT; i < nr_pages; i++ )
page_array[i] += HVM_BELOW_4G_MMIO_LENGTH >> PAGE_SHIFT;
- if ( xc_domain_memory_populate_physmap(xc_handle, dom, nr_pages,
- 0, 0, page_array) )
+ /* Allocate memory for HVM guest, skipping VGA hole 0xA0000-0xC0000. */
+ rc = xc_domain_memory_populate_physmap(
+ xc_handle, dom, (nr_pages > 0xa0) ? 0xa0 : nr_pages,
+ 0, 0, &page_array[0x00]);
+ if ( (rc == 0) && (nr_pages > 0xc0) )
+ rc = xc_domain_memory_populate_physmap(
+ xc_handle, dom, nr_pages - 0xc0, 0, 0, &page_array[0xc0]);
+ if ( rc != 0 )
{
PERROR("Could not allocate memory for HVM guest.\n");
goto error_out;
}
+ if ( (nr_pages > 0xa0) &&
+ xc_domain_memory_decrease_reservation(
+ xc_handle, dom, (nr_pages < 0xc0) ? (nr_pages - 0xa0) : 0x20,
+ 0, &page_array[0xa0]) )
+ {
+ PERROR("Could not free VGA hole.\n");
+ goto error_out;
+ }
+
if ( xc_domain_translate_gpfn_list(xc_handle, dom, nr_pages,
page_array, page_array) )
{
@@ -295,6 +267,8 @@ static int setup_guest(int xc_handle,
/* Mask all upcalls... */
for ( i = 0; i < MAX_VIRT_CPUS; i++ )
shared_info->vcpu_info[i].evtchn_upcall_mask = 1;
+ memset(&shared_info->evtchn_mask[0], 0xff,
+ sizeof(shared_info->evtchn_mask));
munmap(shared_info, PAGE_SIZE);
if ( v_end > HVM_BELOW_4G_RAM_END )
@@ -302,22 +276,17 @@ static int setup_guest(int xc_handle,
else
shared_page_nr = (v_end >> PAGE_SHIFT) - 1;
- *store_mfn = page_array[shared_page_nr - 1];
-
- xc_set_hvm_param(xc_handle, dom, HVM_PARAM_STORE_PFN, shared_page_nr - 1);
- xc_set_hvm_param(xc_handle, dom, HVM_PARAM_STORE_EVTCHN, store_evtchn);
-
- /* Paranoia */
- /* clean the shared IO requests page */
- if ( xc_clear_domain_page(xc_handle, dom, page_array[shared_page_nr]) )
- goto error_out;
-
- /* clean the buffered IO requests page */
- if ( xc_clear_domain_page(xc_handle, dom, page_array[shared_page_nr - 2]) )
+ /* Paranoia: clean pages. */
+ if ( xc_clear_domain_page(xc_handle, dom, page_array[shared_page_nr]) ||
+ xc_clear_domain_page(xc_handle, dom, page_array[shared_page_nr-1]) ||
+ xc_clear_domain_page(xc_handle, dom, page_array[shared_page_nr-2]) )
goto error_out;
- if ( xc_clear_domain_page(xc_handle, dom, *store_mfn) )
- goto error_out;
+ *store_mfn = page_array[shared_page_nr - 1];
+ xc_set_hvm_param(xc_handle, dom, HVM_PARAM_STORE_PFN, shared_page_nr-1);
+ xc_set_hvm_param(xc_handle, dom, HVM_PARAM_STORE_EVTCHN, store_evtchn);
+ xc_set_hvm_param(xc_handle, dom, HVM_PARAM_BUFIOREQ_PFN, shared_page_nr-2);
+ xc_set_hvm_param(xc_handle, dom, HVM_PARAM_IOREQ_PFN, shared_page_nr);
free(page_array);
generated by cgit v1.2.3 (git 2.25.1) at 2025-07-16 11:49:06 +0000