Mirrors/opensbi
7
0
Fork 1
mirror of https://github.com/riscv-software-src/opensbi.git synced 2025-08-25 07:41:42 +01:00
Code Issues Packages Projects Releases Wiki Activity

lib: sbi: Replace args with trap registers in ecall handler

Browse Source 
We had added args pointer in ecall handler to ensure that ecall
handler only implements functionality and does not deal with
SBI calling convention. This also helped us to keep SBI calling
convention related code in one place at sbi_ecall_handler().

The Keystone Enclavce project needs access to the trap regsiters
in their ecall handler so that they can context switch enclaves
in custom SBI calls. To help the Keystone Enclave project, we
replace the args pointer in ecall handler parameter with a const
pointer to trap registers.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
This commit is contained in:
Anup Patel
2020-12-28 18:25:18 +05:30
committed by Anup Patel
parent 7dcb1e1753
commit 80bc5065bb
9 changed files with 76 additions and 69 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
include/sbi/sbi_platform.h
View File

@@ -47,6 +47,7 @@
struct sbi_domain;
struct sbi_trap_info;
struct sbi_trap_regs;
/** Possible feature flags of a platform */
enum sbi_platform_features {
@@ -146,7 +147,7 @@ struct sbi_platform_operations {
int (*vendor_ext_check)(long extid);
/** platform specific SBI extension implementation provider */
int (*vendor_ext_provider)(long extid, long funcid,
unsigned long *args,
const struct sbi_trap_regs *regs,
unsigned long *out_value,
struct sbi_trap_info *out_trap);
} __packed;
@@ -710,7 +711,7 @@ static inline int sbi_platform_vendor_ext_check(const struct sbi_platform *plat,
* @param plat pointer to struct sbi_platform
* @param extid vendor SBI extension id
* @param funcid SBI function id within the extension id
* @param args pointer to arguments passed by the caller
* @param regs pointer to trap registers passed by the caller
* @param out_value output value that can be filled by the callee
* @param out_trap trap info that can be filled by the callee
*
@@ -719,13 +720,13 @@ static inline int sbi_platform_vendor_ext_check(const struct sbi_platform *plat,
static inline int sbi_platform_vendor_ext_provider(
const struct sbi_platform *plat,
long extid, long funcid,
unsigned long *args,
const struct sbi_trap_regs *regs,
unsigned long *out_value,
struct sbi_trap_info *out_trap)
{
if (plat && sbi_platform_ops(plat)->vendor_ext_provider) {
return sbi_platform_ops(plat)->vendor_ext_provider(extid,
funcid, args,
funcid, regs,
out_value,
out_trap);
}