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lib: sbi_tlb: Fix remote TLB HFENCE VVMA implementation

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The HFENCE VVMA instructions flushes TLB based on the VMID
present in HGATP CSR. To handle this, we get the current
VMID for SBI HFENCE VVMA call and we use this current VMID
to do remote TLB HFENCE VVMA on desired set of HARTs.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
This commit is contained in:
Anup Patel
2020-05-04 10:58:07 +05:30
committed by Anup Patel
parent 7993ca2c8e
commit 5338679ff0
5 changed files with 69 additions and 22 deletions
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25
include/sbi/riscv_encoding.h
View File

@@ -111,6 +111,21 @@
#define SATP_MODE_SV57 _UL(10)
#define SATP_MODE_SV64 _UL(11)
#define HGATP_MODE_OFF _UL(0)
#define HGATP_MODE_SV32X4 _UL(1)
#define HGATP_MODE_SV39X4 _UL(8)
#define HGATP_MODE_SV48X4 _UL(9)
#define HGATP32_MODE_SHIFT 31
#define HGATP32_VMID_SHIFT 22
#define HGATP32_VMID_MASK _UL(0x1FC00000)
#define HGATP32_PPN _UL(0x003FFFFF)
#define HGATP64_MODE_SHIFT 60
#define HGATP64_VMID_SHIFT 44
#define HGATP64_VMID_MASK _ULL(0x03FFF00000000000)
#define HGATP64_PPN _ULL(0x00000FFFFFFFFFFF)
#define PMP_R _UL(0x01)
#define PMP_W _UL(0x02)
#define PMP_X _UL(0x04)
@@ -127,10 +142,20 @@
#define MSTATUS_SD MSTATUS64_SD
#define SSTATUS_SD SSTATUS64_SD
#define SATP_MODE SATP64_MODE
#define HGATP_PPN HGATP64_PPN
#define HGATP_VMID_SHIFT HGATP64_VMID_SHIFT
#define HGATP_VMID_MASK HGATP64_VMID_MASK
#define HGATP_MODE_SHIFT HGATP64_MODE_SHIFT
#else
#define MSTATUS_SD MSTATUS32_SD
#define SSTATUS_SD SSTATUS32_SD
#define SATP_MODE SATP32_MODE
#define HGATP_PPN HGATP32_PPN
#define HGATP_VMID_SHIFT HGATP32_VMID_SHIFT
#define HGATP_VMID_MASK HGATP32_VMID_MASK
#define HGATP_MODE_SHIFT HGATP32_MODE_SHIFT
#endif
#define CSR_USTATUS 0x0

14
include/sbi/sbi_tlb.h
View File

@@ -38,17 +38,19 @@ struct sbi_tlb_info {
unsigned long start;
unsigned long size;
unsigned long asid;
unsigned long vmid;
unsigned long type;
struct sbi_hartmask smask;
};
#define SBI_TLB_INFO_INIT(__ptr, __start, __size, __asid, __type, __src_hart) \
#define SBI_TLB_INFO_INIT(__p, __start, __size, __asid, __vmid, __type, __src) \
do { \
(__ptr)->start = (__start); \
(__ptr)->size = (__size); \
(__ptr)->asid = (__asid); \
(__ptr)->type = (__type); \
SBI_HARTMASK_INIT_EXCEPT(&(__ptr)->smask, (__src_hart)); \
(__p)->start = (__start); \
(__p)->size = (__size); \
(__p)->asid = (__asid); \
(__p)->vmid = (__vmid); \
(__p)->type = (__type); \
SBI_HARTMASK_INIT_EXCEPT(&(__p)->smask, (__src)); \
} while (0)
#define SBI_TLB_INFO_SIZE sizeof(struct sbi_tlb_info)

7
lib/sbi/sbi_ecall_legacy.c
View File

@@ -76,7 +76,7 @@ static int sbi_ecall_legacy_handler(unsigned long extid, unsigned long funcid,
ret = sbi_load_hart_mask_unpriv((ulong *)args[0],
&hmask, out_trap);
if (ret != SBI_ETRAP) {
SBI_TLB_INFO_INIT(&tlb_info, 0, 0, 0,
SBI_TLB_INFO_INIT(&tlb_info, 0, 0, 0, 0,
SBI_ITLB_FLUSH, source_hart);
ret = sbi_tlb_request(hmask, 0, &tlb_info);
}
@@ -85,7 +85,7 @@ static int sbi_ecall_legacy_handler(unsigned long extid, unsigned long funcid,
ret = sbi_load_hart_mask_unpriv((ulong *)args[0],
&hmask, out_trap);
if (ret != SBI_ETRAP) {
SBI_TLB_INFO_INIT(&tlb_info, args[1], args[2], 0,
SBI_TLB_INFO_INIT(&tlb_info, args[1], args[2], 0, 0,
SBI_TLB_FLUSH_VMA, source_hart);
ret = sbi_tlb_request(hmask, 0, &tlb_info);
}
@@ -95,7 +95,8 @@ static int sbi_ecall_legacy_handler(unsigned long extid, unsigned long funcid,
&hmask, out_trap);
if (ret != SBI_ETRAP) {
SBI_TLB_INFO_INIT(&tlb_info, args[1], args[2], args[3],
SBI_TLB_FLUSH_VMA_ASID, source_hart);
0, SBI_TLB_FLUSH_VMA_ASID,
source_hart);
ret = sbi_tlb_request(hmask, 0, &tlb_info);
}
break;

19
lib/sbi/sbi_ecall_replace.c
View File

@@ -46,6 +46,7 @@ static int sbi_ecall_rfence_handler(unsigned long extid, unsigned long funcid,
struct sbi_trap_info *out_trap)
{
int ret = 0;
unsigned long vmid;
struct sbi_tlb_info tlb_info;
u32 source_hart = current_hartid();
@@ -56,37 +57,41 @@ static int sbi_ecall_rfence_handler(unsigned long extid, unsigned long funcid,
switch (funcid) {
case SBI_EXT_RFENCE_REMOTE_FENCE_I:
SBI_TLB_INFO_INIT(&tlb_info, 0, 0, 0,
SBI_TLB_INFO_INIT(&tlb_info, 0, 0, 0, 0,
SBI_ITLB_FLUSH, source_hart);
ret = sbi_tlb_request(args[0], args[1], &tlb_info);
break;
case SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA:
SBI_TLB_INFO_INIT(&tlb_info, args[2], args[3], 0,
SBI_TLB_INFO_INIT(&tlb_info, args[2], args[3], 0, 0,
SBI_TLB_FLUSH_GVMA, source_hart);
ret = sbi_tlb_request(args[0], args[1], &tlb_info);
break;
case SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA_VMID:
SBI_TLB_INFO_INIT(&tlb_info, args[2], args[3], args[4],
SBI_TLB_INFO_INIT(&tlb_info, args[2], args[3], 0, args[4],
SBI_TLB_FLUSH_GVMA_VMID, source_hart);
ret = sbi_tlb_request(args[0], args[1], &tlb_info);
break;
case SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA:
SBI_TLB_INFO_INIT(&tlb_info, args[2], args[3], 0,
vmid = (csr_read(CSR_HGATP) & HGATP_VMID_MASK);
vmid = vmid >> HGATP_VMID_SHIFT;
SBI_TLB_INFO_INIT(&tlb_info, args[2], args[3], 0, vmid,
SBI_TLB_FLUSH_VVMA, source_hart);
ret = sbi_tlb_request(args[0], args[1], &tlb_info);
break;
case SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID:
SBI_TLB_INFO_INIT(&tlb_info, args[2], args[3], args[4],
vmid = (csr_read(CSR_HGATP) & HGATP_VMID_MASK);
vmid = vmid >> HGATP_VMID_SHIFT;
SBI_TLB_INFO_INIT(&tlb_info, args[2], args[3], args[4], vmid,
SBI_TLB_FLUSH_VVMA_ASID, source_hart);
ret = sbi_tlb_request(args[0], args[1], &tlb_info);
break;
case SBI_EXT_RFENCE_REMOTE_SFENCE_VMA:
SBI_TLB_INFO_INIT(&tlb_info, args[2], args[3], 0,
SBI_TLB_INFO_INIT(&tlb_info, args[2], args[3], 0, 0,
SBI_TLB_FLUSH_VMA, source_hart);
ret = sbi_tlb_request(args[0], args[1], &tlb_info);
break;
case SBI_EXT_RFENCE_REMOTE_SFENCE_VMA_ASID:
SBI_TLB_INFO_INIT(&tlb_info, args[2], args[3], args[4],
SBI_TLB_INFO_INIT(&tlb_info, args[2], args[3], args[4], 0,
SBI_TLB_FLUSH_VMA_ASID, source_hart);
ret = sbi_tlb_request(args[0], args[1], &tlb_info);
break;

26
lib/sbi/sbi_tlb.c
View File

@@ -36,16 +36,23 @@ static void sbi_tlb_hfence_vvma(struct sbi_tlb_info *tinfo)
{
unsigned long start = tinfo->start;
unsigned long size = tinfo->size;
unsigned long i;
unsigned long vmid = tinfo->vmid;
unsigned long i, hgatp;
hgatp = csr_swap(CSR_HGATP,
(vmid << HGATP_VMID_SHIFT) & HGATP_VMID_MASK);
if ((start == 0 && size == 0) || (size == SBI_TLB_FLUSH_ALL)) {
__sbi_hfence_vvma_all();
return;
goto done;
}
for (i = 0; i < size; i += PAGE_SIZE) {
__sbi_hfence_vvma_va(start+i);
}
done:
csr_write(CSR_HGATP, hgatp);
}
static void sbi_tlb_hfence_gvma(struct sbi_tlb_info *tinfo)
@@ -88,28 +95,35 @@ static void sbi_tlb_hfence_vvma_asid(struct sbi_tlb_info *tinfo)
unsigned long start = tinfo->start;
unsigned long size = tinfo->size;
unsigned long asid = tinfo->asid;
unsigned long i;
unsigned long vmid = tinfo->vmid;
unsigned long i, hgatp;
hgatp = csr_swap(CSR_HGATP,
(vmid << HGATP_VMID_SHIFT) & HGATP_VMID_MASK);
if (start == 0 && size == 0) {
__sbi_hfence_vvma_all();
return;
goto done;
}
if (size == SBI_TLB_FLUSH_ALL) {
__sbi_hfence_vvma_asid(asid);
return;
goto done;
}
for (i = 0; i < size; i += PAGE_SIZE) {
__sbi_hfence_vvma_asid_va(asid, start + i);
}
done:
csr_write(CSR_HGATP, hgatp);
}
static void sbi_tlb_hfence_gvma_vmid(struct sbi_tlb_info *tinfo)
{
unsigned long start = tinfo->start;
unsigned long size = tinfo->size;
unsigned long vmid = tinfo->asid;
unsigned long vmid = tinfo->vmid;
unsigned long i;
if (start == 0 && size == 0) {