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[v2,03/10] riscv: Add CSR definitions for pointer masking

Message ID 20240625210933.1620802-4-samuel.holland@sifive.com (mailing list archive)
State New
Headers show
Series riscv: Userspace pointer masking and tagged address ABI | expand

Checks

Context Check Description
conchuod/vmtest-fixes-PR fail merge-conflict

Commit Message

Samuel Holland June 25, 2024, 9:09 p.m. UTC 
Pointer masking is controlled via a two-bit PMM field, which appears in
various CSRs depending on which extensions are implemented. Smmpm adds
the field to mseccfg; Smnpm adds the field to menvcfg; Ssnpm adds the
field to senvcfg. If the H extension is implemented, Ssnpm also defines
henvcfg.PMM and hstatus.HUPMM.

Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
---

Changes in v2:
 - Use the correct name for the hstatus.HUPMM field

 arch/riscv/include/asm/csr.h | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
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Patch

diff --git a/arch/riscv/include/asm/csr.h b/arch/riscv/include/asm/csr.h
index 25966995da04..5c0c0d574f63 100644
--- a/arch/riscv/include/asm/csr.h
+++ b/arch/riscv/include/asm/csr.h
@@ -119,6 +119,10 @@ 
 
 /* HSTATUS flags */
 #ifdef CONFIG_64BIT
+#define HSTATUS_HUPMM		_AC(0x3000000000000, UL)
+#define HSTATUS_HUPMM_PMLEN_0	_AC(0x0000000000000, UL)
+#define HSTATUS_HUPMM_PMLEN_7	_AC(0x2000000000000, UL)
+#define HSTATUS_HUPMM_PMLEN_16	_AC(0x3000000000000, UL)
 #define HSTATUS_VSXL		_AC(0x300000000, UL)
 #define HSTATUS_VSXL_SHIFT	32
 #endif
@@ -195,6 +199,10 @@ 
 /* xENVCFG flags */
 #define ENVCFG_STCE			(_AC(1, ULL) << 63)
 #define ENVCFG_PBMTE			(_AC(1, ULL) << 62)
+#define ENVCFG_PMM			_AC(0x300000000, ULL)
+#define ENVCFG_PMM_PMLEN_0		_AC(0x000000000, ULL)
+#define ENVCFG_PMM_PMLEN_7		_AC(0x200000000, ULL)
+#define ENVCFG_PMM_PMLEN_16		_AC(0x300000000, ULL)
 #define ENVCFG_CBZE			(_AC(1, UL) << 7)
 #define ENVCFG_CBCFE			(_AC(1, UL) << 6)
 #define ENVCFG_CBIE_SHIFT		4
@@ -216,6 +224,12 @@ 
 #define SMSTATEEN0_SSTATEEN0_SHIFT	63
 #define SMSTATEEN0_SSTATEEN0		(_ULL(1) << SMSTATEEN0_SSTATEEN0_SHIFT)
 
+/* mseccfg bits */
+#define MSECCFG_PMM			ENVCFG_PMM
+#define MSECCFG_PMM_PMLEN_0		ENVCFG_PMM_PMLEN_0
+#define MSECCFG_PMM_PMLEN_7		ENVCFG_PMM_PMLEN_7
+#define MSECCFG_PMM_PMLEN_16		ENVCFG_PMM_PMLEN_16
+
 /* symbolic CSR names: */
 #define CSR_CYCLE		0xc00
 #define CSR_TIME		0xc01
@@ -382,6 +396,8 @@ 
 #define CSR_MIP			0x344
 #define CSR_PMPCFG0		0x3a0
 #define CSR_PMPADDR0		0x3b0
+#define CSR_MSECCFG		0x747
+#define CSR_MSECCFGH		0x757
 #define CSR_MVENDORID		0xf11
 #define CSR_MARCHID		0xf12
 #define CSR_MIMPID		0xf13