Commit b44d84da authored by Mao, Junjie's avatar Mao, Junjie Committed by Marcelo Tosatti
Browse files

Add PCID/INVPCID test



Add unit test for basic functionality of PCID/INVPCID feature exposing in kvm.

Signed-off-by: default avatarJunjie Mao <junjie.mao@intel.com>
Signed-off-by: default avatarMarcelo Tosatti <mtosatti@redhat.com>
parent f9946ef9
......@@ -92,6 +92,8 @@ $(TEST_DIR)/pmu.elf: $(cstart.o) $(TEST_DIR)/pmu.o
$(TEST_DIR)/asyncpf.elf: $(cstart.o) $(TEST_DIR)/asyncpf.o
$(TEST_DIR)/pcid.elf: $(cstart.o) $(TEST_DIR)/pcid.o
arch_clean:
$(RM) $(TEST_DIR)/*.o $(TEST_DIR)/*.flat $(TEST_DIR)/*.elf \
$(TEST_DIR)/.*.d $(TEST_DIR)/lib/.*.d $(TEST_DIR)/lib/*.o
......
......@@ -6,7 +6,8 @@ CFLAGS += -D__x86_64__
tests = $(TEST_DIR)/access.flat $(TEST_DIR)/apic.flat \
$(TEST_DIR)/emulator.flat $(TEST_DIR)/idt_test.flat \
$(TEST_DIR)/xsave.flat $(TEST_DIR)/rmap_chain.flat
$(TEST_DIR)/xsave.flat $(TEST_DIR)/rmap_chain.flat \
$(TEST_DIR)/pcid.flat
tests += $(TEST_DIR)/svm.flat
include config-x86-common.mak
......@@ -13,3 +13,4 @@ smptest: run smp_id() on every cpu and compares return value to number
tsc: write to tsc(0) and write to tsc(100000000000) and read it back
vmexit: long loops for each: cpuid, vmcall, mov_from_cr8, mov_to_cr8, inl_pmtimer, ipi, ipi+halt
kvmclock_test: test of wallclock, monotonic cycle and performance of kvmclock
pcid: basic functionality test of PCID/INVPCID feature
\ No newline at end of file
/* Basic PCID & INVPCID functionality test */
#include "libcflat.h"
#include "processor.h"
#include "desc.h"
int nr_passed, nr_tests;
#define X86_FEATURE_PCID (1 << 17)
#define X86_FEATURE_INVPCID (1 << 10)
#define X86_CR0_PG (1 << 31)
#define X86_CR3_PCID_MASK 0x00000fff
#define X86_CR4_PCIDE (1 << 17)
#define X86_IA32_EFER 0xc0000080
#define X86_EFER_LMA (1UL << 8)
struct invpcid_desc {
unsigned long pcid : 12;
unsigned long rsv : 52;
unsigned long addr : 64;
};
static void report(const char *name, int passed)
{
++nr_tests;
if (passed)
++nr_passed;
printf("%s: %s\n", name, passed ? "PASS" : "FAIL");
}
int write_cr0_checking(unsigned long val)
{
asm volatile(ASM_TRY("1f")
"mov %0, %%cr0\n\t"
"1:": : "r" (val));
return exception_vector();
}
int write_cr4_checking(unsigned long val)
{
asm volatile(ASM_TRY("1f")
"mov %0, %%cr4\n\t"
"1:": : "r" (val));
return exception_vector();
}
int invpcid_checking(unsigned long type, void *desc)
{
asm volatile (ASM_TRY("1f")
".byte 0x66,0x0f,0x38,0x82,0x18 \n\t" /* invpcid (%rax), %rbx */
"1:" : : "a" (desc), "b" (type));
return exception_vector();
}
void test_cpuid_consistency(int pcid_enabled, int invpcid_enabled)
{
int passed = !(!pcid_enabled && invpcid_enabled);
report("CPUID consistency", passed);
}
void test_pcid_enabled(void)
{
int passed = 0;
ulong cr0 = read_cr0(), cr3 = read_cr3(), cr4 = read_cr4();
/* try setting CR4.PCIDE, no exception expected */
if (write_cr4_checking(cr4 | X86_CR4_PCIDE) != 0)
goto report;
/* try clearing CR0.PG when CR4.PCIDE=1, #GP expected */
if (write_cr0_checking(cr0 | X86_CR0_PG) != GP_VECTOR)
goto report;
write_cr4(cr4);
/* try setting CR4.PCIDE when CR3[11:0] != 0 , #GP expected */
write_cr3(cr3 | 0x001);
if (write_cr4_checking(cr4 | X86_CR4_PCIDE) != GP_VECTOR)
goto report;
passed = 1;
report:
report("Test on PCID when enabled", passed);
}
void test_pcid_disabled(void)
{
int passed = 0;
ulong cr4 = read_cr4();
/* try setting CR4.PCIDE, #GP expected */
if (write_cr4_checking(cr4 | X86_CR4_PCIDE) != GP_VECTOR)
goto report;
passed = 1;
report:
report("Test on PCID when disabled", passed);
}
void test_invpcid_enabled(void)
{
int passed = 0;
ulong cr4 = read_cr4();
struct invpcid_desc desc;
desc.rsv = 0;
/* try executing invpcid when CR4.PCIDE=0, desc.pcid=0 and type=1
* no exception expected
*/
desc.pcid = 0;
if (invpcid_checking(1, &desc) != 0)
goto report;
/* try executing invpcid when CR4.PCIDE=0, desc.pcid=1 and type=1
* #GP expected
*/
desc.pcid = 1;
if (invpcid_checking(1, &desc) != GP_VECTOR)
goto report;
if (write_cr4_checking(cr4 | X86_CR4_PCIDE) != 0)
goto report;
/* try executing invpcid when CR4.PCIDE=1
* no exception expected
*/
desc.pcid = 10;
if (invpcid_checking(2, &desc) != 0)
goto report;
passed = 1;
report:
report("Test on INVPCID when enabled", passed);
}
void test_invpcid_disabled(void)
{
int passed = 0;
struct invpcid_desc desc;
/* try executing invpcid, #UD expected */
if (invpcid_checking(2, &desc) != UD_VECTOR)
goto report;
passed = 1;
report:
report("Test on INVPCID when disabled", passed);
}
int main(int ac, char **av)
{
struct cpuid _cpuid;
int pcid_enabled = 0, invpcid_enabled = 0;
setup_idt();
_cpuid = cpuid(1);
if (_cpuid.c & X86_FEATURE_PCID)
pcid_enabled = 1;
_cpuid = cpuid_indexed(7, 0);
if (_cpuid.b & X86_FEATURE_INVPCID)
invpcid_enabled = 1;
test_cpuid_consistency(pcid_enabled, invpcid_enabled);
if (pcid_enabled)
test_pcid_enabled();
else
test_pcid_disabled();
if (invpcid_enabled)
test_invpcid_enabled();
else
test_invpcid_disabled();
printf("%d tests, %d failures\n", nr_tests, nr_tests - nr_passed);
return nr_passed == nr_tests ? 0 : 1;
}
......@@ -98,3 +98,7 @@ extra_params = -cpu qemu64,-svm
file = kvmclock_test.flat
smp = 2
extra_params = --append "10000000 `date +%s`"
[pcid]
file = pcid.flat
extra_params = -cpu qemu64,+pcid
\ No newline at end of file
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