Re: [PATCH v5 1/4] KVM: selftests: Add KVM selftests header files for LoongArch
From: zhaotianrui
Date: Mon Dec 11 2023 - 22:06:29 EST
Hi, Sean:
I want to change the definition of DEFAULT_GUEST_TEST_MEM in the common
file "memstress.h", like this:
/* Default guest test virtual memory offset */
+#ifndef DEFAULT_GUEST_TEST_MEM
#define DEFAULT_GUEST_TEST_MEM 0xc0000000
+#endif
As this address should be re-defined in LoongArch headers.
So, do you have any suggesstion?
Thanks
Tianrui Zhao
在 2023/11/30 下午7:18, Tianrui Zhao 写道:
Add KVM selftests header files for LoongArch, including processor.h
and kvm_util_base.h. Those mainly contain LoongArch CSR register defines
and page table information. And change DEFAULT_GUEST_TEST_MEM base addr
for LoongArch.
Signed-off-by: Tianrui Zhao <zhaotianrui@xxxxxxxxxxx>
---
.../selftests/kvm/include/kvm_util_base.h | 5 +
.../kvm/include/loongarch/processor.h | 133 ++++++++++++++++++
.../testing/selftests/kvm/include/memstress.h | 2 +
3 files changed, 140 insertions(+)
create mode 100644 tools/testing/selftests/kvm/include/loongarch/processor.h
diff --git a/tools/testing/selftests/kvm/include/kvm_util_base.h b/tools/testing/selftests/kvm/include/kvm_util_base.h
index a18db6a7b3c..97f8b24741b 100644
--- a/tools/testing/selftests/kvm/include/kvm_util_base.h
+++ b/tools/testing/selftests/kvm/include/kvm_util_base.h
@@ -218,6 +218,11 @@ extern enum vm_guest_mode vm_mode_default;
#define MIN_PAGE_SHIFT 12U
#define ptes_per_page(page_size) ((page_size) / 8)
+#elif defined(__loongarch__)
+#define VM_MODE_DEFAULT VM_MODE_P36V47_16K
+#define MIN_PAGE_SHIFT 14U
+#define ptes_per_page(page_size) ((page_size) / 8)
+
#endif
#define MIN_PAGE_SIZE (1U << MIN_PAGE_SHIFT)
diff --git a/tools/testing/selftests/kvm/include/loongarch/processor.h b/tools/testing/selftests/kvm/include/loongarch/processor.h
new file mode 100644
index 00000000000..cea6b284131
--- /dev/null
+++ b/tools/testing/selftests/kvm/include/loongarch/processor.h
@@ -0,0 +1,133 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef SELFTEST_KVM_PROCESSOR_H
+#define SELFTEST_KVM_PROCESSOR_H
+
+#define _PAGE_VALID_SHIFT 0
+#define _PAGE_DIRTY_SHIFT 1
+#define _PAGE_PLV_SHIFT 2 /* 2~3, two bits */
+#define _CACHE_SHIFT 4 /* 4~5, two bits */
+#define _PAGE_PRESENT_SHIFT 7
+#define _PAGE_WRITE_SHIFT 8
+
+#define PLV_KERN 0
+#define PLV_USER 3
+#define PLV_MASK 0x3
+
+#define _PAGE_VALID (0x1UL << _PAGE_VALID_SHIFT)
+#define _PAGE_PRESENT (0x1UL << _PAGE_PRESENT_SHIFT)
+#define _PAGE_WRITE (0x1UL << _PAGE_WRITE_SHIFT)
+#define _PAGE_DIRTY (0x1UL << _PAGE_DIRTY_SHIFT)
+#define _PAGE_USER (PLV_USER << _PAGE_PLV_SHIFT)
+#define __READABLE (_PAGE_VALID)
+#define __WRITEABLE (_PAGE_DIRTY | _PAGE_WRITE)
+#define _CACHE_CC (0x1UL << _CACHE_SHIFT) /* Coherent Cached */
+
+/* general registers */
+#define zero $r0
+#define ra $r1
+#define tp $r2
+#define sp $r3
+#define a0 $r4
+#define a1 $r5
+#define a2 $r6
+#define a3 $r7
+#define a4 $r8
+#define a5 $r9
+#define a6 $r10
+#define a7 $r11
+#define t0 $r12
+#define t1 $r13
+#define t2 $r14
+#define t3 $r15
+#define t4 $r16
+#define t5 $r17
+#define t6 $r18
+#define t7 $r19
+#define t8 $r20
+#define u0 $r21
+#define fp $r22
+#define s0 $r23
+#define s1 $r24
+#define s2 $r25
+#define s3 $r26
+#define s4 $r27
+#define s5 $r28
+#define s6 $r29
+#define s7 $r30
+#define s8 $r31
+
+#define PS_4K 0x0000000c
+#define PS_8K 0x0000000d
+#define PS_16K 0x0000000e
+#define PS_DEFAULT_SIZE PS_16K
+
+/* Basic CSR registers */
+#define LOONGARCH_CSR_CRMD 0x0 /* Current mode info */
+#define CSR_CRMD_PG_SHIFT 4
+#define CSR_CRMD_PG (0x1UL << CSR_CRMD_PG_SHIFT)
+#define CSR_CRMD_IE_SHIFT 2
+#define CSR_CRMD_IE (0x1UL << CSR_CRMD_IE_SHIFT)
+#define CSR_CRMD_PLV_SHIFT 0
+#define CSR_CRMD_PLV_WIDTH 2
+#define CSR_CRMD_PLV (0x3UL << CSR_CRMD_PLV_SHIFT)
+#define PLV_MASK 0x3
+
+#define LOONGARCH_CSR_PRMD 0x1
+#define LOONGARCH_CSR_EUEN 0x2
+#define LOONGARCH_CSR_ECFG 0x4
+#define LOONGARCH_CSR_ESTAT 0x5 /* Exception status */
+#define LOONGARCH_CSR_ERA 0x6 /* ERA */
+#define LOONGARCH_CSR_BADV 0x7 /* Bad virtual address */
+#define LOONGARCH_CSR_EENTRY 0xc
+#define LOONGARCH_CSR_TLBIDX 0x10 /* TLB Index, EHINV, PageSize, NP */
+#define CSR_TLBIDX_PS_SHIFT 24
+#define CSR_TLBIDX_PS_WIDTH 6
+#define CSR_TLBIDX_PS (0x3fUL << CSR_TLBIDX_PS_SHIFT)
+#define CSR_TLBIDX_SIZEM 0x3f000000
+#define CSR_TLBIDX_SIZE CSR_TLBIDX_PS_SHIFT
+
+#define LOONGARCH_CSR_ASID 0x18 /* ASID */
+/* Page table base address when VA[VALEN-1] = 0 */
+#define LOONGARCH_CSR_PGDL 0x19
+/* Page table base address when VA[VALEN-1] = 1 */
+#define LOONGARCH_CSR_PGDH 0x1a
+/* Page table base */
+#define LOONGARCH_CSR_PGD 0x1b
+#define LOONGARCH_CSR_PWCTL0 0x1c
+#define LOONGARCH_CSR_PWCTL1 0x1d
+#define LOONGARCH_CSR_STLBPGSIZE 0x1e
+#define LOONGARCH_CSR_CPUID 0x20
+#define LOONGARCH_CSR_KS0 0x30
+#define LOONGARCH_CSR_KS1 0x31
+#define LOONGARCH_CSR_TMID 0x40
+#define LOONGARCH_CSR_TCFG 0x41
+#define LOONGARCH_CSR_TLBRENTRY 0x88 /* TLB refill exception entry */
+/* KSave for TLB refill exception */
+#define LOONGARCH_CSR_TLBRSAVE 0x8b
+#define LOONGARCH_CSR_TLBREHI 0x8e
+#define CSR_TLBREHI_PS_SHIFT 0
+#define CSR_TLBREHI_PS (0x3fUL << CSR_TLBREHI_PS_SHIFT)
+
+#define DEFAULT_LOONARCH64_STACK_MIN 0x4000
+#define DEFAULT_LOONARCH64_PAGE_TABLE_MIN 0x4000
+#define EXREGS_GPRS (32)
+
+#ifndef __ASSEMBLER__
+struct ex_regs {
+ unsigned long regs[EXREGS_GPRS];
+ unsigned long pc;
+ unsigned long estat;
+ unsigned long badv;
+};
+
+extern void handle_tlb_refill(void);
+extern void handle_exception(void);
+#endif
+
+#define PC_OFFSET_EXREGS ((EXREGS_GPRS + 0) * 8)
+#define ESTAT_OFFSET_EXREGS ((EXREGS_GPRS + 1) * 8)
+#define BADV_OFFSET_EXREGS ((EXREGS_GPRS + 2) * 8)
+#define EXREGS_SIZE ((EXREGS_GPRS + 3) * 8)
+
+#endif /* SELFTEST_KVM_PROCESSOR_H */
diff --git a/tools/testing/selftests/kvm/include/memstress.h b/tools/testing/selftests/kvm/include/memstress.h
index ce4e603050e..5bcdaf2efab 100644
--- a/tools/testing/selftests/kvm/include/memstress.h
+++ b/tools/testing/selftests/kvm/include/memstress.h
@@ -13,7 +13,9 @@
#include "kvm_util.h"
/* Default guest test virtual memory offset */
+#ifndef DEFAULT_GUEST_TEST_MEM
#define DEFAULT_GUEST_TEST_MEM 0xc0000000
+#endif
#define DEFAULT_PER_VCPU_MEM_SIZE (1 << 30) /* 1G */