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[PULL 12/18] target/riscv: Update the Hypervisor trap return/entry
From: |
Alistair Francis |
Subject: |
[PULL 12/18] target/riscv: Update the Hypervisor trap return/entry |
Date: |
Tue, 25 Aug 2020 11:48:30 -0700 |
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Message-id:
e7e4e801234f2934306e734f65860f601a5745bd.1597259519.git.alistair.francis@wdc.com
Message-Id:
<e7e4e801234f2934306e734f65860f601a5745bd.1597259519.git.alistair.francis@wdc.com>
---
target/riscv/cpu_bits.h | 1 +
target/riscv/cpu_helper.c | 16 ++++++----------
target/riscv/op_helper.c | 8 ++------
target/riscv/translate.c | 10 ----------
4 files changed, 9 insertions(+), 26 deletions(-)
diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h
index 43617e7c1f..fb6a3e9092 100644
--- a/target/riscv/cpu_bits.h
+++ b/target/riscv/cpu_bits.h
@@ -445,6 +445,7 @@
#define HSTATUS_VTSR 0x00400000
#define HSTATUS_HU 0x00000200
#define HSTATUS_GVA 0x00000040
+#define HSTATUS_SPVP 0x00000100
#define HSTATUS32_WPRI 0xFF8FF87E
#define HSTATUS64_WPRI 0xFFFFFFFFFF8FF87EULL
diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c
index 661e790fdc..dc7ae3e7b1 100644
--- a/target/riscv/cpu_helper.c
+++ b/target/riscv/cpu_helper.c
@@ -929,9 +929,7 @@ void riscv_cpu_do_interrupt(CPUState *cs)
} else if (riscv_cpu_virt_enabled(env)) {
/* Trap into HS mode, from virt */
riscv_cpu_swap_hypervisor_regs(env);
- env->hstatus = set_field(env->hstatus, HSTATUS_SP2V,
- get_field(env->hstatus, HSTATUS_SPV));
- env->hstatus = set_field(env->hstatus, HSTATUS_SP2P,
+ env->hstatus = set_field(env->hstatus, HSTATUS_SPVP,
get_field(env->mstatus, SSTATUS_SPP));
env->hstatus = set_field(env->hstatus, HSTATUS_SPV,
riscv_cpu_virt_enabled(env));
@@ -942,13 +940,11 @@ void riscv_cpu_do_interrupt(CPUState *cs)
riscv_cpu_set_force_hs_excep(env, 0);
} else {
/* Trap into HS mode */
- env->hstatus = set_field(env->hstatus, HSTATUS_SP2V,
- get_field(env->hstatus, HSTATUS_SPV));
- env->hstatus = set_field(env->hstatus, HSTATUS_SP2P,
- get_field(env->mstatus, SSTATUS_SPP));
- env->hstatus = set_field(env->hstatus, HSTATUS_SPV,
- riscv_cpu_virt_enabled(env));
-
+ if (!riscv_cpu_two_stage_lookup(env)) {
+ env->hstatus = set_field(env->hstatus, HSTATUS_SPV,
+ riscv_cpu_virt_enabled(env));
+ }
+ riscv_cpu_set_two_stage_lookup(env, false);
htval = env->guest_phys_fault_addr;
}
}
diff --git a/target/riscv/op_helper.c b/target/riscv/op_helper.c
index 3d306c343c..4b64bfe7d2 100644
--- a/target/riscv/op_helper.c
+++ b/target/riscv/op_helper.c
@@ -97,12 +97,8 @@ target_ulong helper_sret(CPURISCVState *env, target_ulong
cpu_pc_deb)
prev_priv = get_field(mstatus, MSTATUS_SPP);
prev_virt = get_field(hstatus, HSTATUS_SPV);
- hstatus = set_field(hstatus, HSTATUS_SPV,
- get_field(hstatus, HSTATUS_SP2V));
- mstatus = set_field(mstatus, MSTATUS_SPP,
- get_field(hstatus, HSTATUS_SP2P));
- hstatus = set_field(hstatus, HSTATUS_SP2V, 0);
- hstatus = set_field(hstatus, HSTATUS_SP2P, 0);
+ hstatus = set_field(hstatus, HSTATUS_SPV, 0);
+ mstatus = set_field(mstatus, MSTATUS_SPP, 0);
mstatus = set_field(mstatus, SSTATUS_SIE,
get_field(mstatus, SSTATUS_SPIE));
mstatus = set_field(mstatus, SSTATUS_SPIE, 1);
diff --git a/target/riscv/translate.c b/target/riscv/translate.c
index 3919f570f7..79dca2291b 100644
--- a/target/riscv/translate.c
+++ b/target/riscv/translate.c
@@ -797,16 +797,6 @@ static void riscv_tr_init_disas_context(DisasContextBase
*dcbase, CPUState *cs)
#if !defined(CONFIG_USER_ONLY)
if (riscv_has_ext(env, RVH)) {
ctx->virt_enabled = riscv_cpu_virt_enabled(env);
- if (env->priv_ver == PRV_M &&
- get_field(env->mstatus, MSTATUS_MPRV) &&
- MSTATUS_MPV_ISSET(env)) {
- ctx->virt_enabled = true;
- } else if (env->priv == PRV_S &&
- !riscv_cpu_virt_enabled(env) &&
- get_field(env->hstatus, HSTATUS_SPRV) &&
- get_field(env->hstatus, HSTATUS_SPV)) {
- ctx->virt_enabled = true;
- }
} else {
ctx->virt_enabled = false;
}
--
2.28.0
- [PULL 02/18] hw/riscv: Allow creating multiple instances of PLIC, (continued)
- [PULL 02/18] hw/riscv: Allow creating multiple instances of PLIC, Alistair Francis, 2020/08/25
- [PULL 03/18] hw/riscv: Add helpers for RISC-V multi-socket NUMA machines, Alistair Francis, 2020/08/25
- [PULL 04/18] hw/riscv: spike: Allow creating multiple NUMA sockets, Alistair Francis, 2020/08/25
- [PULL 06/18] target/riscv: Allow setting a two-stage lookup in the virt status, Alistair Francis, 2020/08/25
- [PULL 05/18] hw/riscv: virt: Allow creating multiple NUMA sockets, Alistair Francis, 2020/08/25
- [PULL 10/18] target/riscv: Convert MSTATUS MTL to GVA, Alistair Francis, 2020/08/25
- [PULL 07/18] target/riscv: Allow generating hlv/hlvx/hsv instructions, Alistair Francis, 2020/08/25
- [PULL 08/18] target/riscv: Do two-stage lookups on hlv/hlvx/hsv instructions, Alistair Francis, 2020/08/25
- [PULL 09/18] target/riscv: Don't allow guest to write to htinst, Alistair Francis, 2020/08/25
- [PULL 11/18] target/riscv: Fix the interrupt cause code, Alistair Francis, 2020/08/25
- [PULL 12/18] target/riscv: Update the Hypervisor trap return/entry,
Alistair Francis <=
- [PULL 13/18] target/riscv: Update the CSRs to the v0.6 Hyp extension, Alistair Francis, 2020/08/25
- [PULL 14/18] target/riscv: Only support a single VSXL length, Alistair Francis, 2020/08/25
- [PULL 16/18] target/riscv: Support the v0.6 Hypervisor extension CRSs, Alistair Francis, 2020/08/25
- [PULL 15/18] target/riscv: Only support little endian guests, Alistair Francis, 2020/08/25
- [PULL 17/18] target/riscv: Return the exception from invalid CSR accesses, Alistair Francis, 2020/08/25
- [PULL 18/18] target/riscv: Support the Virtual Instruction fault, Alistair Francis, 2020/08/25
- Re: [PULL 00/18] riscv-to-apply queue, Peter Maydell, 2020/08/25