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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v2 1/2] hvmloader: dynamically determine scratch memory range for tests
This re-enables tests on configurations where commit 0d6968635c
("hvmloader: avoid tests when they would clobber used memory") forced
them to be skipped.
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
---
v2: Avoid negative array index in setup_paging() to make code easier
to follow. Correct a wrong comment.
--- a/tools/firmware/hvmloader/tests.c
+++ b/tools/firmware/hvmloader/tests.c
@@ -29,14 +29,15 @@
/*
* Memory layout during tests:
- * 4MB to 8MB is cleared.
- * Page directory resides at 4MB.
- * 2 page table pages reside at 4MB+4kB to 4MB+12kB.
- * Pagetables identity-map 0-8MB, except 4kB at va 6MB maps to pa 5MB.
+ * The 4MB block at test_mem_base is cleared.
+ * Page directory resides at test_mem_base.
+ * 2 page table pages reside at test_mem_base+4kB to test_mem_base+12kB.
+ * Pagetables identity-map 0-4MB and test_mem_base-test_mem_base+4MB,
+ * except 4kB at va test_mem_base+2MB maps to pa test_mem_base+1MB.
*/
-#define TEST_MEM_BASE (4ul << 20)
+static unsigned long test_mem_base;
#define TEST_MEM_SIZE (4ul << 20)
-#define PD_START TEST_MEM_BASE
+#define PD_START test_mem_base
#define PT_START (PD_START + 4096)
static void setup_paging(void)
@@ -45,14 +46,25 @@ static void setup_paging(void)
uint32_t *pt = (uint32_t *)PT_START;
uint32_t i;
- /* Identity map 0-8MB. */
- for ( i = 0; i < 2; i++ )
- pd[i] = (unsigned long)pt + (i<<12) + 3;
- for ( i = 0; i < 2 * 1024; i++ )
- pt[i] = (i << 12) + 3;
+ /* Identity map [0,_end). */
+ for ( i = 0; i <= (unsigned long)(_end - 1) >> (PAGE_SHIFT + 10); ++i )
+ {
+ unsigned int j;
+
+ pd[i] = (unsigned long)pt + 3;
+ for ( j = 0; j < PAGE_SIZE / sizeof(*pt); ++j )
+ *pt++ = (i << (PAGE_SHIFT + 10)) + (j << PAGE_SHIFT) + 3;
+ }
+
+ /* Identity map TEST_MEM_SIZE @ test_mem_base. */
+ for ( i = 0; i < (TEST_MEM_SIZE >> (PAGE_SHIFT + 10)); ++i )
+ pd[i + (test_mem_base >> (PAGE_SHIFT + 10))] =
+ (unsigned long)pt + (i << PAGE_SHIFT) + 3;
+ for ( i = 0; i < (TEST_MEM_SIZE >> PAGE_SHIFT); ++i )
+ pt[i] = test_mem_base + (i << PAGE_SHIFT) + 3;
- /* Page at virtual 6MB maps to physical 5MB. */
- pt[6u<<8] -= 0x100000u;
+ /* Page at virtual test_mem_base+2MB maps physical test_mem_base+1MB. */
+ pt[0x200000 >> PAGE_SHIFT] -= 0x100000;
}
static void start_paging(void)
@@ -81,42 +93,42 @@ static int rep_io_test(void)
uint32_t *p;
uint32_t i, p0, p1, p2;
int okay = TEST_PASS;
-
- static const struct {
+ const struct {
unsigned long addr;
uint32_t expected;
} check[] = {
- { 0x00500000, 0x987654ff },
- { 0x00500ffc, 0xff000000 },
- { 0x005ffffc, 0xff000000 },
- { 0x00601000, 0x000000ff },
+ { test_mem_base + 0x00100000, 0x987654ff },
+ { test_mem_base + 0x00100ffc, 0xff000000 },
+ { test_mem_base + 0x001ffffc, 0xff000000 },
+ { test_mem_base + 0x00201000, 0x000000ff },
{ 0, 0 }
};
start_paging();
/* Phys 5MB = 0xdeadbeef */
- *(uint32_t *)0x500000ul = 0xdeadbeef;
+ *(uint32_t *)(test_mem_base + 0x100000) = 0xdeadbeef;
- /* Phys 5MB = 0x98765432 */
- *(uint32_t *)0x600000ul = 0x98765432;
+ /* Phys 6MB = 0x98765432 */
+ *(uint32_t *)(test_mem_base + 0x200000) = 0x98765432;
/* Phys 0x5fffff = Phys 0x500000 = 0xff (byte) */
asm volatile (
"rep insb"
: "=d" (p0), "=c" (p1), "=D" (p2)
- : "0" (0x5f), "1" (2), "2" (0x5ffffful) : "memory" );
+ : "0" (0x5f), "1" (2), "2" (test_mem_base + 0x1fffff) : "memory" );
/* Phys 0x500fff = Phys 0x601000 = 0xff (byte) */
asm volatile (
"std ; rep insb ; cld"
: "=d" (p0), "=c" (p1), "=D" (p2)
- : "0" (0x5f), "1" (2), "2" (0x601000ul) : "memory" );
+ : "0" (0x5f), "1" (2), "2" (test_mem_base + 0x201000) : "memory" );
stop_paging();
i = 0;
- for ( p = (uint32_t *)0x4ff000ul; p < (uint32_t *)0x602000ul; p++ )
+ for ( p = (uint32_t *)(test_mem_base + 0x0ff000);
+ p < (uint32_t *)(test_mem_base + 0x202000); p++ )
{
uint32_t expected = 0;
if ( check[i].addr == (unsigned long)p )
@@ -148,13 +160,14 @@ static int shadow_gs_test(void)
if ( !(edx & (1u<<29)) )
return TEST_SKIP;
- /* Long mode pagetable setup: Identity map 0-8MB with 2MB mappings. */
+ /* Long mode pagetable setup: Identity map [0,_end) with 2MB mappings. */
*pd = (unsigned long)pd + 0x1007; /* Level 4 */
pd += 512;
*pd = (unsigned long)pd + 0x1007; /* Level 3 */
pd += 512;
- for ( i = 0; i < 4; i++ ) /* Level 2 */
- *pd++ = (i << 21) + 0x1e3;
+ /* Level 2: */
+ for ( i = 0; i <= (unsigned long)(_end - 1) >> (PAGE_SHIFT + 9); i++ )
+ *pd++ = (i << (PAGE_SHIFT + 9)) + 0x1e3;
asm volatile (
/* CR4.PAE=1 */
@@ -208,29 +221,6 @@ void perform_tests(void)
printf("Testing HVM environment:\n");
BUILD_BUG_ON(SCRATCH_PHYSICAL_ADDRESS > HVMLOADER_PHYSICAL_ADDRESS);
- if ( hvm_info->low_mem_pgend <
- ((TEST_MEM_BASE + TEST_MEM_SIZE) >> PAGE_SHIFT) )
- {
- printf("Skipping tests due to insufficient memory (<%luMB)\n",
- (TEST_MEM_BASE + TEST_MEM_SIZE) >> 20);
- return;
- }
-
- if ( (unsigned long)_end > TEST_MEM_BASE )
- {
- printf("Skipping tests due to overlap with base image\n");
- return;
- }
-
- if ( hvm_start_info->cmdline_paddr &&
- hvm_start_info->cmdline_paddr < TEST_MEM_BASE + TEST_MEM_SIZE &&
- ((hvm_start_info->cmdline_paddr +
- strlen((char *)(uintptr_t)hvm_start_info->cmdline_paddr)) >=
- TEST_MEM_BASE) )
- {
- printf("Skipping tests due to overlap with command line\n");
- return;
- }
if ( hvm_start_info->rsdp_paddr )
{
@@ -238,54 +228,67 @@ void perform_tests(void)
return;
}
- if ( hvm_start_info->nr_modules )
+ for ( ; ; test_mem_base += TEST_MEM_SIZE )
{
- const struct hvm_modlist_entry *modlist =
- (void *)(uintptr_t)hvm_start_info->modlist_paddr;
-
- if ( hvm_start_info->modlist_paddr > UINTPTR_MAX ||
- ((UINTPTR_MAX - (uintptr_t)modlist) / sizeof(*modlist) <
- hvm_start_info->nr_modules) )
+ if ( hvm_info->low_mem_pgend <
+ ((test_mem_base + TEST_MEM_SIZE) >> PAGE_SHIFT) )
{
- printf("Skipping tests due to inaccessible module list\n");
+ printf("Skipping tests due to insufficient memory (<%luMB)\n",
+ (test_mem_base + TEST_MEM_SIZE) >> 20);
return;
}
- if ( TEST_MEM_BASE < (uintptr_t)(modlist +
- hvm_start_info->nr_modules) &&
- (uintptr_t)modlist < TEST_MEM_BASE + TEST_MEM_SIZE )
- {
- printf("Skipping tests due to overlap with module list\n");
- return;
- }
+ if ( (unsigned long)_end > test_mem_base )
+ continue;
+
+ if ( hvm_start_info->cmdline_paddr &&
+ hvm_start_info->cmdline_paddr < test_mem_base + TEST_MEM_SIZE &&
+ ((hvm_start_info->cmdline_paddr +
+ strlen((char *)(uintptr_t)hvm_start_info->cmdline_paddr)) >=
+ test_mem_base) )
+ continue;
- for ( i = 0; i < hvm_start_info->nr_modules; ++i )
+ if ( hvm_start_info->nr_modules )
{
- if ( TEST_MEM_BASE < modlist[i].paddr + modlist[i].size &&
- modlist[i].paddr < TEST_MEM_BASE + TEST_MEM_SIZE )
- {
- printf("Skipping tests due to overlap with module %u\n", i);
- return;
- }
+ const struct hvm_modlist_entry *modlist =
+ (void *)(uintptr_t)hvm_start_info->modlist_paddr;
+
+ if ( hvm_start_info->modlist_paddr > UINTPTR_MAX ||
+ ((UINTPTR_MAX - (uintptr_t)modlist) / sizeof(*modlist) <
+ hvm_start_info->nr_modules) )
+ continue;
+
+ if ( test_mem_base < (uintptr_t)(modlist +
+ hvm_start_info->nr_modules) &&
+ (uintptr_t)modlist < test_mem_base + TEST_MEM_SIZE )
+ continue;
- if ( modlist[i].cmdline_paddr &&
- modlist[i].cmdline_paddr < TEST_MEM_BASE + TEST_MEM_SIZE &&
- ((modlist[i].cmdline_paddr +
- strlen((char *)(uintptr_t)modlist[i].cmdline_paddr)) >=
- TEST_MEM_BASE) )
+ for ( i = 0; i < hvm_start_info->nr_modules; ++i )
{
- printf("Skipping tests due to overlap with module %u
cmdline\n",
- i);
- return;
+ if ( test_mem_base < modlist[i].paddr + modlist[i].size &&
+ modlist[i].paddr < test_mem_base + TEST_MEM_SIZE )
+ break;
+
+ if ( modlist[i].cmdline_paddr &&
+ modlist[i].cmdline_paddr < test_mem_base + TEST_MEM_SIZE
&&
+ ((modlist[i].cmdline_paddr +
+ strlen((char *)(uintptr_t)modlist[i].cmdline_paddr)) >=
+ test_mem_base) )
+ break;
}
+ if ( i < hvm_start_info->nr_modules )
+ continue;
}
+
+ printf("Using scratch memory at %lx\n", test_mem_base);
+ break;
}
passed = skipped = 0;
for ( i = 0; tests[i].test; i++ )
{
printf(" - %s ... ", tests[i].description);
- memset((char *)(4ul << 20), 0, 4ul << 20);
+ memset((char *)test_mem_base, 0, TEST_MEM_SIZE);
setup_paging();
switch ( (*tests[i].test)() )
{
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