From: Alistair Francis <alistair.francis@wdc.com>
To: qemu-devel@nongnu.org, qemu-riscv@nongnu.org
Cc: alistair.francis@wdc.com, bmeng.cn@gmail.com, palmer@dabbelt.com,
alistair23@gmail.com
Subject: [PATCH v3 6/8] target/riscv: Add a config option for ePMP
Date: Tue, 13 Apr 2021 12:42:44 +1000 [thread overview]
Message-ID: <5369dff9ce1abd04874dc71dd1bae4d3e6428a25.1618281655.git.alistair.francis@wdc.com> (raw)
In-Reply-To: <cover.1618281655.git.alistair.francis@wdc.com>
From: Hou Weiying <weiying_hou@outlook.com>
Add a config option to enable experimental support for ePMP. This
is disabled by default and can be enabled with 'x-epmp=true'.
Signed-off-by: Hongzheng-Li <Ethan.Lee.QNL@gmail.com>
Signed-off-by: Hou Weiying <weiying_hou@outlook.com>
Signed-off-by: Myriad-Dreamin <camiyoru@gmail.com>
Message-Id: <SG2PR02MB263458D195A60A57C05EBE9993450@SG2PR02MB2634.apcprd02.prod.outlook.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
---
target/riscv/cpu.h | 1 +
target/riscv/cpu.c | 10 ++++++++++
2 files changed, 11 insertions(+)
diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index 83b315e0b2..add734bbbd 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -304,6 +304,7 @@ struct RISCVCPU {
uint16_t elen;
bool mmu;
bool pmp;
+ bool epmp;
uint64_t resetvec;
} cfg;
};
diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index e530df9385..66787d019c 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -412,6 +412,14 @@ static void riscv_cpu_realize(DeviceState *dev, Error **errp)
if (cpu->cfg.pmp) {
set_feature(env, RISCV_FEATURE_PMP);
+
+ /*
+ * Enhanced PMP should only be available
+ * on harts with PMP support
+ */
+ if (cpu->cfg.epmp) {
+ set_feature(env, RISCV_FEATURE_EPMP);
+ }
}
set_resetvec(env, cpu->cfg.resetvec);
@@ -554,6 +562,8 @@ static Property riscv_cpu_properties[] = {
DEFINE_PROP_UINT16("elen", RISCVCPU, cfg.elen, 64),
DEFINE_PROP_BOOL("mmu", RISCVCPU, cfg.mmu, true),
DEFINE_PROP_BOOL("pmp", RISCVCPU, cfg.pmp, true),
+ DEFINE_PROP_BOOL("x-epmp", RISCVCPU, cfg.epmp, false),
+
DEFINE_PROP_UINT64("resetvec", RISCVCPU, cfg.resetvec, DEFAULT_RSTVEC),
DEFINE_PROP_END_OF_LIST(),
};
--
2.31.1
next prev parent reply other threads:[~2021-04-13 2:44 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-13 2:41 [PATCH v3 0/8] RISC-V: Add support for ePMP v0.9.1 Alistair Francis
2021-04-13 2:41 ` [PATCH v3 1/8] target/riscv: Fix the PMP is locked check when using TOR Alistair Francis
2021-04-13 2:41 ` [PATCH v3 2/8] target/riscv: Define ePMP mseccfg Alistair Francis
2021-04-13 2:42 ` [PATCH v3 3/8] target/riscv: Add the ePMP feature Alistair Francis
2021-04-13 2:42 ` [PATCH v3 4/8] target/riscv: Add ePMP CSR access functions Alistair Francis
2021-04-13 2:42 ` [PATCH v3 5/8] target/riscv: Implementation of enhanced PMP (ePMP) Alistair Francis
2021-04-14 7:35 ` Bin Meng
2021-04-15 4:17 ` Alistair Francis
2021-04-13 2:42 ` Alistair Francis [this message]
2021-04-13 2:42 ` [PATCH v3 7/8] target/riscv/pmp: Remove outdated comment Alistair Francis
2021-04-13 2:43 ` [PATCH v3 8/8] target/riscv: Add ePMP support for the Ibex CPU Alistair Francis
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=5369dff9ce1abd04874dc71dd1bae4d3e6428a25.1618281655.git.alistair.francis@wdc.com \
--to=alistair.francis@wdc.com \
--cc=alistair23@gmail.com \
--cc=bmeng.cn@gmail.com \
--cc=palmer@dabbelt.com \
--cc=qemu-devel@nongnu.org \
--cc=qemu-riscv@nongnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).