Move the nNPT testcases to their own test and file, svm_npt.c, so that the
nNPT tests can run without the USER bit set in the host PTEs (in order to
toggle CR4.SMEP) without preventing other nSVM testcases from running code
in usersmode.
Suggested-by: Sean Christopherson <seanjc@xxxxxxxxxx>
Signed-off-by: Manali Shukla <manali.shukla@xxxxxxx>
---
x86/Makefile.common | 2 +
x86/Makefile.x86_64 | 2 +
x86/svm.c | 8 -
x86/svm_npt.c | 390 ++++++++++++++++++++++++++++++++++++++++++++
x86/svm_tests.c | 371 +----------------------------------------
x86/unittests.cfg | 6 +
6 files changed, 409 insertions(+), 370 deletions(-)
create mode 100644 x86/svm_npt.c
diff --git a/x86/Makefile.common b/x86/Makefile.common
index a600c72..b7010e2 100644
--- a/x86/Makefile.common
+++ b/x86/Makefile.common
@@ -108,6 +108,8 @@ $(TEST_DIR)/access_test.$(bin): $(TEST_DIR)/access.o
$(TEST_DIR)/vmx.$(bin): $(TEST_DIR)/access.o
+$(TEST_DIR)/svm_npt.$(bin): $(TEST_DIR)/svm.o
+
$(TEST_DIR)/kvmclock_test.$(bin): $(TEST_DIR)/kvmclock.o
$(TEST_DIR)/hyperv_synic.$(bin): $(TEST_DIR)/hyperv.o
diff --git a/x86/Makefile.x86_64 b/x86/Makefile.x86_64
index e19284a..8f9463c 100644
--- a/x86/Makefile.x86_64
+++ b/x86/Makefile.x86_64
@@ -44,6 +44,7 @@ endif
ifneq ($(CONFIG_EFI),y)
tests += $(TEST_DIR)/access_test.$(exe)
tests += $(TEST_DIR)/svm.$(exe)
+tests += $(TEST_DIR)/svm_npt.$(exe)
tests += $(TEST_DIR)/vmx.$(exe)
endif
@@ -57,3 +58,4 @@ $(TEST_DIR)/hyperv_clock.$(bin): $(TEST_DIR)/hyperv_clock.o
$(TEST_DIR)/vmx.$(bin): $(TEST_DIR)/vmx_tests.o
$(TEST_DIR)/svm.$(bin): $(TEST_DIR)/svm_tests.o
+$(TEST_DIR)/svm_npt.$(bin): $(TEST_DIR)/svm_npt.o
diff --git a/x86/svm.c b/x86/svm.c
index 36ba05e..b586807 100644
--- a/x86/svm.c
+++ b/x86/svm.c
@@ -440,11 +440,3 @@ int run_svm_tests(int ac, char **av)
return report_summary();
}
-
-int main(int ac, char **av)
-{
- pteval_t opt_mask = 0;
-
- __setup_vm(&opt_mask);
- return run_svm_tests(ac, av);
-}
diff --git a/x86/svm_npt.c b/x86/svm_npt.c
new file mode 100644
index 0000000..53e8a90
--- /dev/null
+++ b/x86/svm_npt.c
@@ -0,0 +1,390 @@
+#include "svm.h"
+#include "vm.h"
+#include "alloc_page.h"
+#include "vmalloc.h"
+
+static void *scratch_page;
+
+static void null_test(struct svm_test *test)
+{
+}
+
+static void npt_np_prepare(struct svm_test *test)
+{
+ u64 *pte;
+
+ scratch_page = alloc_page();
+ pte = npt_get_pte((u64) scratch_page);
+
+ *pte &= ~1ULL;
+}
+
+static void npt_np_test(struct svm_test *test)
+{
+ (void)*(volatile u64 *)scratch_page;
+}
+
+static bool npt_np_check(struct svm_test *test)
+{
+ u64 *pte = npt_get_pte((u64) scratch_page);
+
+ *pte |= 1ULL;
+
+ return (vmcb->control.exit_code == SVM_EXIT_NPF)
+ && (vmcb->control.exit_info_1 == 0x100000004ULL);
+}
+
+static void npt_nx_prepare(struct svm_test *test)
+{
+ u64 *pte;
+
+ test->scratch = rdmsr(MSR_EFER);
+ wrmsr(MSR_EFER, test->scratch | EFER_NX);
+
+ /* Clear the guest's EFER.NX, it should not affect NPT behavior. */
+ vmcb->save.efer &= ~EFER_NX;
+
+ pte = npt_get_pte((u64) null_test);
+
+ *pte |= PT64_NX_MASK;
+}
+
+static bool npt_nx_check(struct svm_test *test)
+{
+ u64 *pte = npt_get_pte((u64) null_test);
+
+ wrmsr(MSR_EFER, test->scratch);
+
+ *pte &= ~PT64_NX_MASK;
+
+ return (vmcb->control.exit_code == SVM_EXIT_NPF)
+ && (vmcb->control.exit_info_1 == 0x100000015ULL);
+}
+
+static void npt_us_prepare(struct svm_test *test)
+{
+ u64 *pte;
+
+ scratch_page = alloc_page();
+ pte = npt_get_pte((u64) scratch_page);
+
+ *pte &= ~(1ULL << 2);
+}
+
+static void npt_us_test(struct svm_test *test)
+{
+ (void)*(volatile u64 *)scratch_page;
+}
+
+static bool npt_us_check(struct svm_test *test)
+{
+ u64 *pte = npt_get_pte((u64) scratch_page);
+
+ *pte |= (1ULL << 2);
+
+ return (vmcb->control.exit_code == SVM_EXIT_NPF)
+ && (vmcb->control.exit_info_1 == 0x100000005ULL);
+}
+
+static void npt_rw_prepare(struct svm_test *test)
+{
+
+ u64 *pte;
+
+ pte = npt_get_pte(0x80000);
+
+ *pte &= ~(1ULL << 1);
+}
+
+static void npt_rw_test(struct svm_test *test)
+{
+ u64 *data = (void *)(0x80000);
+
+ *data = 0;
+}
+
+static bool npt_rw_check(struct svm_test *test)
+{
+ u64 *pte = npt_get_pte(0x80000);
+
+ *pte |= (1ULL << 1);
+
+ return (vmcb->control.exit_code == SVM_EXIT_NPF)
+ && (vmcb->control.exit_info_1 == 0x100000007ULL);
+}
+
+static void npt_rw_pfwalk_prepare(struct svm_test *test)
+{
+
+ u64 *pte;
+
+ pte = npt_get_pte(read_cr3());
+
+ *pte &= ~(1ULL << 1);
+}
+
+static bool npt_rw_pfwalk_check(struct svm_test *test)
+{
+ u64 *pte = npt_get_pte(read_cr3());
+
+ *pte |= (1ULL << 1);
+
+ return (vmcb->control.exit_code == SVM_EXIT_NPF)
+ && (vmcb->control.exit_info_1 == 0x200000007ULL)
+ && (vmcb->control.exit_info_2 == read_cr3());
+}
+
+static void npt_l1mmio_prepare(struct svm_test *test)
+{
+}
+
+u32 nested_apic_version1;
+u32 nested_apic_version2;
+
+static void npt_l1mmio_test(struct svm_test *test)
+{
+ volatile u32 *data = (volatile void *)(0xfee00030UL);
+
+ nested_apic_version1 = *data;
+ nested_apic_version2 = *data;
+}
+
+static bool npt_l1mmio_check(struct svm_test *test)
+{
+ volatile u32 *data = (volatile void *)(0xfee00030);
+ u32 lvr = *data;
+
+ return nested_apic_version1 == lvr && nested_apic_version2 == lvr;
+}
+
+static void npt_rw_l1mmio_prepare(struct svm_test *test)
+{
+
+ u64 *pte;
+
+ pte = npt_get_pte(0xfee00080);
+
+ *pte &= ~(1ULL << 1);
+}
+
+static void npt_rw_l1mmio_test(struct svm_test *test)
+{
+ volatile u32 *data = (volatile void *)(0xfee00080);
+
+ *data = *data;
+}
+
+static bool npt_rw_l1mmio_check(struct svm_test *test)
+{
+ u64 *pte = npt_get_pte(0xfee00080);
+
+ *pte |= (1ULL << 1);
+
+ return (vmcb->control.exit_code == SVM_EXIT_NPF)
+ && (vmcb->control.exit_info_1 == 0x100000007ULL);
+}
+
+static void basic_guest_main(struct svm_test *test)
+{
+}
+
+static void __svm_npt_rsvd_bits_test(u64 * pxe, u64 rsvd_bits, u64 efer,
+ ulong cr4, u64 guest_efer, ulong guest_cr4)
+{
+ u64 pxe_orig = *pxe;
+ int exit_reason;
+ u64 pfec;
+
+ wrmsr(MSR_EFER, efer);
+ write_cr4(cr4);
+
+ vmcb->save.efer = guest_efer;
+ vmcb->save.cr4 = guest_cr4;
+
+ *pxe |= rsvd_bits;
+
+ exit_reason = svm_vmrun();
+
+ report(exit_reason == SVM_EXIT_NPF,
+ "Wanted #NPF on rsvd bits = 0x%lx, got exit = 0x%x", rsvd_bits,
+ exit_reason);
+
+ if (pxe == npt_get_pdpe() || pxe == npt_get_pml4e()) {
+ /*
+ * The guest's page tables will blow up on a bad PDPE/PML4E,
+ * before starting the final walk of the guest page.
+ */
+ pfec = 0x20000000full;
+ } else {
+ /* RSVD #NPF on final walk of guest page. */
+ pfec = 0x10000000dULL;
+
+ /* PFEC.FETCH=1 if NX=1 *or* SMEP=1. */
+ if ((cr4 & X86_CR4_SMEP) || (efer & EFER_NX))
+ pfec |= 0x10;
+
+ }
+
+ report(vmcb->control.exit_info_1 == pfec,
+ "Wanted PFEC = 0x%lx, got PFEC = %lx, PxE = 0x%lx. "
+ "host.NX = %u, host.SMEP = %u, guest.NX = %u, guest.SMEP = %u",
+ pfec, vmcb->control.exit_info_1, *pxe,
+ !!(efer & EFER_NX), !!(cr4 & X86_CR4_SMEP),
+ !!(guest_efer & EFER_NX), !!(guest_cr4 & X86_CR4_SMEP));
+
+ *pxe = pxe_orig;
+}
+
+static void _svm_npt_rsvd_bits_test(u64 * pxe, u64 pxe_rsvd_bits, u64 efer,
+ ulong cr4, u64 guest_efer, ulong guest_cr4)
+{
+ u64 rsvd_bits;
+ int i;
+
+ /*
+ * RDTSC or RDRAND can sometimes fail to generate a valid reserved bits
+ */
+ if (!pxe_rsvd_bits) {
+ report_skip
+ ("svm_npt_rsvd_bits_test: Reserved bits are not valid");
+ return;
+ }
+
+ /*
+ * Test all combinations of guest/host EFER.NX and CR4.SMEP. If host
+ * EFER.NX=0, use NX as the reserved bit, otherwise use the passed in
+ * @pxe_rsvd_bits.
+ */
+ for (i = 0; i < 16; i++) {
+ if (i & 1) {
+ rsvd_bits = pxe_rsvd_bits;
+ efer |= EFER_NX;
+ } else {
+ rsvd_bits = PT64_NX_MASK;
+ efer &= ~EFER_NX;
+ }
+ if (i & 2)
+ cr4 |= X86_CR4_SMEP;
+ else
+ cr4 &= ~X86_CR4_SMEP;
+ if (i & 4)
+ guest_efer |= EFER_NX;
+ else
+ guest_efer &= ~EFER_NX;
+ if (i & 8)
+ guest_cr4 |= X86_CR4_SMEP;
+ else
+ guest_cr4 &= ~X86_CR4_SMEP;
+
+ __svm_npt_rsvd_bits_test(pxe, rsvd_bits, efer, cr4,
+ guest_efer, guest_cr4);
+ }
+}
+
+static u64 get_random_bits(u64 hi, u64 low)
+{
+ unsigned retry = 5;
+ u64 rsvd_bits = 0;
+
+ if (this_cpu_has(X86_FEATURE_RDRAND)) {
+ do {
+ rsvd_bits = (rdrand() << low) & GENMASK_ULL(hi, low);
+ retry--;
+ } while (!rsvd_bits && retry);
+ }
+
+ if (!rsvd_bits) {
+ retry = 5;
+ do {
+ rsvd_bits = (rdtsc() << low) & GENMASK_ULL(hi, low);
+ retry--;
+ } while (!rsvd_bits && retry);
+ }
+
+ return rsvd_bits;
+}
+
+static void svm_npt_rsvd_bits_test(void)
+{
+ u64 saved_efer, host_efer, sg_efer, guest_efer;
+ ulong saved_cr4, host_cr4, sg_cr4, guest_cr4;
+
+ if (!npt_supported()) {
+ report_skip("NPT not supported");
+ return;
+ }
+
+ saved_efer = host_efer = rdmsr(MSR_EFER);
+ saved_cr4 = host_cr4 = read_cr4();
+ sg_efer = guest_efer = vmcb->save.efer;
+ sg_cr4 = guest_cr4 = vmcb->save.cr4;
+
+ test_set_guest(basic_guest_main);
+
+ /*
+ * 4k PTEs don't have reserved bits if MAXPHYADDR >= 52, just skip the
+ * sub-test. The NX test is still valid, but the extra bit of coverage
+ * isn't worth the extra complexity.
+ */
+ if (cpuid_maxphyaddr() >= 52)
+ goto skip_pte_test;
+
+ _svm_npt_rsvd_bits_test(npt_get_pte((u64) basic_guest_main),
+ get_random_bits(51, cpuid_maxphyaddr()),
+ host_efer, host_cr4, guest_efer, guest_cr4);
+
+skip_pte_test:
+ _svm_npt_rsvd_bits_test(npt_get_pde((u64) basic_guest_main),
+ get_random_bits(20, 13) | PT_PAGE_SIZE_MASK,
+ host_efer, host_cr4, guest_efer, guest_cr4);
+
+ _svm_npt_rsvd_bits_test(npt_get_pdpe(),
+ PT_PAGE_SIZE_MASK |
+ (this_cpu_has(X86_FEATURE_GBPAGES) ?
+ get_random_bits(29, 13) : 0), host_efer,
+ host_cr4, guest_efer, guest_cr4);
+
+ _svm_npt_rsvd_bits_test(npt_get_pml4e(), BIT_ULL(8),
+ host_efer, host_cr4, guest_efer, guest_cr4);
+
+ wrmsr(MSR_EFER, saved_efer);
+ write_cr4(saved_cr4);
+ vmcb->save.efer = sg_efer;
+ vmcb->save.cr4 = sg_cr4;
+}
+
+int main(int ac, char **av)
+{
+ pteval_t opt_mask = 0;
+
+ __setup_vm(&opt_mask);
+ return run_svm_tests(ac, av);
+}
+
+#define TEST(name) { #name, .v2 = name }
+
+struct svm_test svm_tests[] = {
+ { "npt_nx", npt_supported, npt_nx_prepare,
+ default_prepare_gif_clear, null_test,
+ default_finished, npt_nx_check },
+ { "npt_np", npt_supported, npt_np_prepare,
+ default_prepare_gif_clear, npt_np_test,
+ default_finished, npt_np_check },
+ { "npt_us", npt_supported, npt_us_prepare,
+ default_prepare_gif_clear, npt_us_test,
+ default_finished, npt_us_check },
+ { "npt_rw", npt_supported, npt_rw_prepare,
+ default_prepare_gif_clear, npt_rw_test,
+ default_finished, npt_rw_check },
+ { "npt_rw_pfwalk", npt_supported, npt_rw_pfwalk_prepare,
+ default_prepare_gif_clear, null_test,
+ default_finished, npt_rw_pfwalk_check },
+ { "npt_l1mmio", npt_supported, npt_l1mmio_prepare,
+ default_prepare_gif_clear, npt_l1mmio_test,
+ default_finished, npt_l1mmio_check },
+ { "npt_rw_l1mmio", npt_supported, npt_rw_l1mmio_prepare,
+ default_prepare_gif_clear, npt_rw_l1mmio_test,
+ default_finished, npt_rw_l1mmio_check },
+ TEST(svm_npt_rsvd_bits_test),
+ { NULL, NULL, NULL, NULL, NULL, NULL, NULL }
+};
diff --git a/x86/svm_tests.c b/x86/svm_tests.c
index 1bd4d3b..37ca792 100644
--- a/x86/svm_tests.c
+++ b/x86/svm_tests.c
@@ -10,11 +10,10 @@
#include "isr.h"
#include "apic.h"
#include "delay.h"
+#include "vmalloc.h"
#define SVM_EXIT_MAX_DR_INTERCEPT 0x3f
-static void *scratch_page;
-
#define LATENCY_RUNS 1000000
extern u16 cpu_online_count;
@@ -698,181 +697,6 @@ static bool sel_cr0_bug_check(struct svm_test *test)
return vmcb->control.exit_code == SVM_EXIT_CR0_SEL_WRITE;
}
-static void npt_nx_prepare(struct svm_test *test)
-{
- u64 *pte;
-
- test->scratch = rdmsr(MSR_EFER);
- wrmsr(MSR_EFER, test->scratch | EFER_NX);
-
- /* Clear the guest's EFER.NX, it should not affect NPT behavior. */
- vmcb->save.efer &= ~EFER_NX;
-
- pte = npt_get_pte((u64)null_test);
-
- *pte |= PT64_NX_MASK;
-}
-
-static bool npt_nx_check(struct svm_test *test)
-{
- u64 *pte = npt_get_pte((u64)null_test);
-
- wrmsr(MSR_EFER, test->scratch);
-
- *pte &= ~PT64_NX_MASK;
-
- return (vmcb->control.exit_code == SVM_EXIT_NPF)
- && (vmcb->control.exit_info_1 == 0x100000015ULL);
-}
-
-static void npt_np_prepare(struct svm_test *test)
-{
- u64 *pte;
-
- scratch_page = alloc_page();
- pte = npt_get_pte((u64)scratch_page);
-
- *pte &= ~1ULL;
-}
-
-static void npt_np_test(struct svm_test *test)
-{
- (void) *(volatile u64 *)scratch_page;
-}
-
-static bool npt_np_check(struct svm_test *test)
-{
- u64 *pte = npt_get_pte((u64)scratch_page);
-
- *pte |= 1ULL;
-
- return (vmcb->control.exit_code == SVM_EXIT_NPF)
- && (vmcb->control.exit_info_1 == 0x100000004ULL);
-}
-
-static void npt_us_prepare(struct svm_test *test)
-{
- u64 *pte;
-
- scratch_page = alloc_page();
- pte = npt_get_pte((u64)scratch_page);
-
- *pte &= ~(1ULL << 2);
-}
-
-static void npt_us_test(struct svm_test *test)
-{
- (void) *(volatile u64 *)scratch_page;
-}
-
-static bool npt_us_check(struct svm_test *test)
-{
- u64 *pte = npt_get_pte((u64)scratch_page);
-
- *pte |= (1ULL << 2);
-
- return (vmcb->control.exit_code == SVM_EXIT_NPF)
- && (vmcb->control.exit_info_1 == 0x100000005ULL);
-}
-
-static void npt_rw_prepare(struct svm_test *test)
-{
-
- u64 *pte;
-
- pte = npt_get_pte(0x80000);
-
- *pte &= ~(1ULL << 1);
-}
-
-static void npt_rw_test(struct svm_test *test)
-{
- u64 *data = (void*)(0x80000);
-
- *data = 0;
-}
-
-static bool npt_rw_check(struct svm_test *test)
-{
- u64 *pte = npt_get_pte(0x80000);
-
- *pte |= (1ULL << 1);
-
- return (vmcb->control.exit_code == SVM_EXIT_NPF)
- && (vmcb->control.exit_info_1 == 0x100000007ULL);
-}
-
-static void npt_rw_pfwalk_prepare(struct svm_test *test)
-{
-
- u64 *pte;
-
- pte = npt_get_pte(read_cr3());
-
- *pte &= ~(1ULL << 1);
-}
-
-static bool npt_rw_pfwalk_check(struct svm_test *test)
-{
- u64 *pte = npt_get_pte(read_cr3());
-
- *pte |= (1ULL << 1);
-
- return (vmcb->control.exit_code == SVM_EXIT_NPF)
- && (vmcb->control.exit_info_1 == 0x200000007ULL)
- && (vmcb->control.exit_info_2 == read_cr3());
-}
-
-static void npt_l1mmio_prepare(struct svm_test *test)
-{
-}
-
-u32 nested_apic_version1;
-u32 nested_apic_version2;
-
-static void npt_l1mmio_test(struct svm_test *test)
-{
- volatile u32 *data = (volatile void*)(0xfee00030UL);
-
- nested_apic_version1 = *data;
- nested_apic_version2 = *data;
-}
-
-static bool npt_l1mmio_check(struct svm_test *test)
-{
- volatile u32 *data = (volatile void*)(0xfee00030);
- u32 lvr = *data;
-
- return nested_apic_version1 == lvr && nested_apic_version2 == lvr;
-}
-
-static void npt_rw_l1mmio_prepare(struct svm_test *test)
-{
-
- u64 *pte;
-
- pte = npt_get_pte(0xfee00080);
-
- *pte &= ~(1ULL << 1);
-}
-
-static void npt_rw_l1mmio_test(struct svm_test *test)
-{
- volatile u32 *data = (volatile void*)(0xfee00080);
-
- *data = *data;
-}
-
-static bool npt_rw_l1mmio_check(struct svm_test *test)
-{
- u64 *pte = npt_get_pte(0xfee00080);
-
- *pte |= (1ULL << 1);
-
- return (vmcb->control.exit_code == SVM_EXIT_NPF)
- && (vmcb->control.exit_info_1 == 0x100000007ULL);
-}
-
#define TSC_ADJUST_VALUE (1ll << 32)
#define TSC_OFFSET_VALUE (~0ull << 48)
static bool ok;
@@ -2672,169 +2496,6 @@ static void svm_test_singlestep(void)
vmcb->save.rip == (u64)&guest_end, "Test EFLAGS.TF on VMRUN: guest execution completion");
}
-static void __svm_npt_rsvd_bits_test(u64 *pxe, u64 rsvd_bits, u64 efer,
- ulong cr4, u64 guest_efer, ulong guest_cr4)
-{
- u64 pxe_orig = *pxe;
- int exit_reason;
- u64 pfec;
-
- wrmsr(MSR_EFER, efer);
- write_cr4(cr4);
-
- vmcb->save.efer = guest_efer;
- vmcb->save.cr4 = guest_cr4;
-
- *pxe |= rsvd_bits;
-
- exit_reason = svm_vmrun();
-
- report(exit_reason == SVM_EXIT_NPF,
- "Wanted #NPF on rsvd bits = 0x%lx, got exit = 0x%x", rsvd_bits, exit_reason);
-
- if (pxe == npt_get_pdpe() || pxe == npt_get_pml4e()) {
- /*
- * The guest's page tables will blow up on a bad PDPE/PML4E,
- * before starting the final walk of the guest page.
- */
- pfec = 0x20000000full;
- } else {
- /* RSVD #NPF on final walk of guest page. */
- pfec = 0x10000000dULL;
-
- /* PFEC.FETCH=1 if NX=1 *or* SMEP=1. */
- if ((cr4 & X86_CR4_SMEP) || (efer & EFER_NX))
- pfec |= 0x10;
-
- }
-
- report(vmcb->control.exit_info_1 == pfec,
- "Wanted PFEC = 0x%lx, got PFEC = %lx, PxE = 0x%lx. "
- "host.NX = %u, host.SMEP = %u, guest.NX = %u, guest.SMEP = %u",
- pfec, vmcb->control.exit_info_1, *pxe,
- !!(efer & EFER_NX), !!(cr4 & X86_CR4_SMEP),
- !!(guest_efer & EFER_NX), !!(guest_cr4 & X86_CR4_SMEP));
-
- *pxe = pxe_orig;
-}
-
-static void _svm_npt_rsvd_bits_test(u64 *pxe, u64 pxe_rsvd_bits, u64 efer,
- ulong cr4, u64 guest_efer, ulong guest_cr4)
-{
- u64 rsvd_bits;
- int i;
-
- /*
- * RDTSC or RDRAND can sometimes fail to generate a valid reserved bits
- */
- if (!pxe_rsvd_bits) {
- report_skip("svm_npt_rsvd_bits_test: Reserved bits are not valid");
- return;
- }
-
- /*
- * Test all combinations of guest/host EFER.NX and CR4.SMEP. If host
- * EFER.NX=0, use NX as the reserved bit, otherwise use the passed in
- * @pxe_rsvd_bits.
- */
- for (i = 0; i < 16; i++) {
- if (i & 1) {
- rsvd_bits = pxe_rsvd_bits;
- efer |= EFER_NX;
- } else {
- rsvd_bits = PT64_NX_MASK;
- efer &= ~EFER_NX;
- }
- if (i & 2)
- cr4 |= X86_CR4_SMEP;
- else
- cr4 &= ~X86_CR4_SMEP;
- if (i & 4)
- guest_efer |= EFER_NX;
- else
- guest_efer &= ~EFER_NX;
- if (i & 8)
- guest_cr4 |= X86_CR4_SMEP;
- else
- guest_cr4 &= ~X86_CR4_SMEP;
-
- __svm_npt_rsvd_bits_test(pxe, rsvd_bits, efer, cr4,
- guest_efer, guest_cr4);
- }
-}
-
-static u64 get_random_bits(u64 hi, u64 low)
-{
- unsigned retry = 5;
- u64 rsvd_bits = 0;
-
- if (this_cpu_has(X86_FEATURE_RDRAND)) {
- do {
- rsvd_bits = (rdrand() << low) & GENMASK_ULL(hi, low);
- retry--;
- } while (!rsvd_bits && retry);
- }
-
- if (!rsvd_bits) {
- retry = 5;
- do {
- rsvd_bits = (rdtsc() << low) & GENMASK_ULL(hi, low);
- retry--;
- } while (!rsvd_bits && retry);
- }
-
- return rsvd_bits;
-}
-
-
-static void svm_npt_rsvd_bits_test(void)
-{
- u64 saved_efer, host_efer, sg_efer, guest_efer;
- ulong saved_cr4, host_cr4, sg_cr4, guest_cr4;
-
- if (!npt_supported()) {
- report_skip("NPT not supported");
- return;
- }
-
- saved_efer = host_efer = rdmsr(MSR_EFER);
- saved_cr4 = host_cr4 = read_cr4();
- sg_efer = guest_efer = vmcb->save.efer;
- sg_cr4 = guest_cr4 = vmcb->save.cr4;
-
- test_set_guest(basic_guest_main);
-
- /*
- * 4k PTEs don't have reserved bits if MAXPHYADDR >= 52, just skip the
- * sub-test. The NX test is still valid, but the extra bit of coverage
- * isn't worth the extra complexity.
- */
- if (cpuid_maxphyaddr() >= 52)
- goto skip_pte_test;
-
- _svm_npt_rsvd_bits_test(npt_get_pte((u64)basic_guest_main),
- get_random_bits(51, cpuid_maxphyaddr()),
- host_efer, host_cr4, guest_efer, guest_cr4);
-
-skip_pte_test:
- _svm_npt_rsvd_bits_test(npt_get_pde((u64)basic_guest_main),
- get_random_bits(20, 13) | PT_PAGE_SIZE_MASK,
- host_efer, host_cr4, guest_efer, guest_cr4);
-
- _svm_npt_rsvd_bits_test(npt_get_pdpe(),
- PT_PAGE_SIZE_MASK |
- (this_cpu_has(X86_FEATURE_GBPAGES) ? get_random_bits(29, 13) : 0),
- host_efer, host_cr4, guest_efer, guest_cr4);
-
- _svm_npt_rsvd_bits_test(npt_get_pml4e(), BIT_ULL(8),
- host_efer, host_cr4, guest_efer, guest_cr4);
-
- wrmsr(MSR_EFER, saved_efer);
- write_cr4(saved_cr4);
- vmcb->save.efer = sg_efer;
- vmcb->save.cr4 = sg_cr4;
-}
-
static bool volatile svm_errata_reproduced = false;
static unsigned long volatile physical = 0;
@@ -3634,6 +3295,14 @@ static void svm_intr_intercept_mix_smi(void)
svm_intr_intercept_mix_run_guest(NULL, SVM_EXIT_SMI);
}
+int main(int ac, char **av)
+{
+ pteval_t opt_mask = 0;
+
+ __setup_vm(&opt_mask);
+ return run_svm_tests(ac, av);
+}
+
struct svm_test svm_tests[] = {
{ "null", default_supported, default_prepare,
default_prepare_gif_clear, null_test,
@@ -3677,27 +3346,6 @@ struct svm_test svm_tests[] = {
{ "sel_cr0_bug", default_supported, sel_cr0_bug_prepare,
default_prepare_gif_clear, sel_cr0_bug_test,
sel_cr0_bug_finished, sel_cr0_bug_check },
- { "npt_nx", npt_supported, npt_nx_prepare,
- default_prepare_gif_clear, null_test,
- default_finished, npt_nx_check },
- { "npt_np", npt_supported, npt_np_prepare,
- default_prepare_gif_clear, npt_np_test,
- default_finished, npt_np_check },
- { "npt_us", npt_supported, npt_us_prepare,
- default_prepare_gif_clear, npt_us_test,
- default_finished, npt_us_check },
- { "npt_rw", npt_supported, npt_rw_prepare,
- default_prepare_gif_clear, npt_rw_test,
- default_finished, npt_rw_check },
- { "npt_rw_pfwalk", npt_supported, npt_rw_pfwalk_prepare,
- default_prepare_gif_clear, null_test,
- default_finished, npt_rw_pfwalk_check },
- { "npt_l1mmio", npt_supported, npt_l1mmio_prepare,
- default_prepare_gif_clear, npt_l1mmio_test,
- default_finished, npt_l1mmio_check },
- { "npt_rw_l1mmio", npt_supported, npt_rw_l1mmio_prepare,
- default_prepare_gif_clear, npt_rw_l1mmio_test,
- default_finished, npt_rw_l1mmio_check },
{ "tsc_adjust", tsc_adjust_supported, tsc_adjust_prepare,
default_prepare_gif_clear, tsc_adjust_test,
default_finished, tsc_adjust_check },
@@ -3749,7 +3397,6 @@ struct svm_test svm_tests[] = {
vgif_check },
TEST(svm_cr4_osxsave_test),
TEST(svm_guest_state_test),
- TEST(svm_npt_rsvd_bits_test),
TEST(svm_vmrun_errata_test),
TEST(svm_vmload_vmsave),
TEST(svm_test_singlestep),
diff --git a/x86/unittests.cfg b/x86/unittests.cfg
index d6dc19f..01d775e 100644
--- a/x86/unittests.cfg
+++ b/x86/unittests.cfg
@@ -260,6 +260,12 @@ extra_params = -cpu max,+svm -overcommit cpu-pm=on -m 4g -append pause_filter_te
arch = x86_64
groups = svm
+[svm_npt]
+file = svm_npt.flat
+smp = 2
+extra_params = -cpu max,+svm -m 4g
+arch = x86_64
+
[taskswitch]
file = taskswitch.flat
arch = i386
--
2.30.2
