From: Raymond Mao <raymondmaoca@gmail.com>
To: opensbi@lists.infradead.org
Cc: scott@riscstar.com, dave.patel@riscstar.com,
raymond.mao@riscstar.com, robin.randhawa@sifive.com,
samuel.holland@sifive.com, anup.patel@qti.qualcomm.com,
anuppate@qti.qualcomm.com, anup@brainfault.org,
dhaval@rivosinc.com, peter.lin@sifive.com
Subject: [RFC PATCH 1/3] hart: add WorldGuard CSR IDs and hart extension flags
Date: Fri, 1 May 2026 14:33:44 -0400 [thread overview]
Message-ID: <20260501183346.1596027-2-raymondmaoca@gmail.com> (raw)
In-Reply-To: <20260501183346.1596027-1-raymondmaoca@gmail.com>
From: Raymond Mao <raymond.mao@riscstar.com>
Define the WorldGuard-related CSR numbers and claim smwg / sswg hart
extensions so platform code can probe support before programming
MLWID, MWIDDELEG and SLWID.
Signed-off-by: Raymond Mao <raymond.mao@riscstar.com>
---
include/sbi/riscv_encoding.h | 3 +++
include/sbi/sbi_hart.h | 4 ++++
lib/sbi/sbi_hart.c | 2 ++
3 files changed, 9 insertions(+)
diff --git a/include/sbi/riscv_encoding.h b/include/sbi/riscv_encoding.h
index 46bbeed0..48304132 100644
--- a/include/sbi/riscv_encoding.h
+++ b/include/sbi/riscv_encoding.h
@@ -331,6 +331,7 @@
/* Supervisor Protection and Translation */
#define CSR_SATP 0x180
+#define CSR_SLWID 0x190
/* Supervisor Indirect Register Alias */
#define CSR_SISELECT 0x150
@@ -454,6 +455,7 @@
/* Machine Configuration */
#define CSR_MENVCFG 0x30a
#define CSR_MENVCFGH 0x31a
+#define CSR_MLWID 0x390
/* Machine Trap Handling */
#define CSR_MSCRATCH 0x340
@@ -680,6 +682,7 @@
/* Machine Security Configuration CSR (mseccfg) */
#define CSR_MSECCFG 0x747
#define CSR_MSECCFGH 0x757
+#define CSR_MWIDDELEG 0x748
#define MSECCFG_MML_SHIFT (0)
#define MSECCFG_MML (_UL(1) << MSECCFG_MML_SHIFT)
diff --git a/include/sbi/sbi_hart.h b/include/sbi/sbi_hart.h
index cc78eec6..2c725ae2 100644
--- a/include/sbi/sbi_hart.h
+++ b/include/sbi/sbi_hart.h
@@ -63,6 +63,10 @@ enum sbi_hart_extensions {
SBI_HART_EXT_SSCSRIND,
/** Hart has Ssccfg extension */
SBI_HART_EXT_SSCCFG,
+ /** Hart has Smwg extension */
+ SBI_HART_EXT_SMWG,
+ /** Hart has Sswg extension */
+ SBI_HART_EXT_SSWG,
/** Maximum index of Hart extension */
SBI_HART_EXT_MAX,
diff --git a/lib/sbi/sbi_hart.c b/lib/sbi/sbi_hart.c
index 3d136944..6fc03a59 100644
--- a/lib/sbi/sbi_hart.c
+++ b/lib/sbi/sbi_hart.c
@@ -666,6 +666,8 @@ const struct sbi_hart_ext_data sbi_hart_ext[] = {
__SBI_HART_EXT_DATA(sdtrig, SBI_HART_EXT_SDTRIG),
__SBI_HART_EXT_DATA(smcsrind, SBI_HART_EXT_SMCSRIND),
__SBI_HART_EXT_DATA(smcdeleg, SBI_HART_EXT_SMCDELEG),
+ __SBI_HART_EXT_DATA(smwg, SBI_HART_EXT_SMWG),
+ __SBI_HART_EXT_DATA(sswg, SBI_HART_EXT_SSWG),
};
/**
--
2.25.1
--
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next prev parent reply other threads:[~2026-05-01 18:34 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-01 18:33 [RFC PATCH 0/3] Add QEMU virt WorldGuard support on top of HWISO Raymond Mao
2026-05-01 18:33 ` Raymond Mao [this message]
2026-05-01 18:33 ` [RFC PATCH 2/3] docs: document hwiso WorldGuard DT bindings and add QEMU overlay example Raymond Mao
2026-05-01 18:33 ` [RFC PATCH 3/3] platform: virt: add QEMU virt WorldGuard hwiso mechanism Raymond Mao
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