Skip to content

csr: disalbe page fault delegation with nommu #2126

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Nov 6, 2025
Merged

csr: disalbe page fault delegation with nommu #2126

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
11 changes: 6 additions & 5 deletions riscv/csrs.cc
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -966,8 +966,11 @@ medeleg_csr_t::medeleg_csr_t(processor_t* const proc, const reg_t addr):
| (1 << CAUSE_FETCH_GUEST_PAGE_FAULT)
| (1 << CAUSE_LOAD_GUEST_PAGE_FAULT)
| (1 << CAUSE_VIRTUAL_INSTRUCTION)
| (1 << CAUSE_STORE_GUEST_PAGE_FAULT)
) {
| (1 << CAUSE_STORE_GUEST_PAGE_FAULT)),
mmu_exceptions(0
| (1 << CAUSE_FETCH_PAGE_FAULT)
| (1 << CAUSE_LOAD_PAGE_FAULT)
| (1 << CAUSE_STORE_PAGE_FAULT)) {
}

void medeleg_csr_t::verify_permissions(insn_t insn, bool write) const {
Expand All @@ -988,9 +991,7 @@ bool medeleg_csr_t::unlogged_write(const reg_t val) noexcept {
| (1 << CAUSE_STORE_ACCESS)
| (1 << CAUSE_USER_ECALL)
| (1 << CAUSE_SUPERVISOR_ECALL)
| (1 << CAUSE_FETCH_PAGE_FAULT)
| (1 << CAUSE_LOAD_PAGE_FAULT)
| (1 << CAUSE_STORE_PAGE_FAULT)
| (proc->supports_impl(IMPL_MMU) ? mmu_exceptions : 0)
| (proc->extension_enabled('H') ? hypervisor_exceptions : 0)
| (1 << CAUSE_SOFTWARE_CHECK_FAULT)
| (1 << CAUSE_HARDWARE_ERROR_FAULT)
Expand Down
1 change: 1 addition & 0 deletions riscv/csrs.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -468,6 +468,7 @@ class medeleg_csr_t: public basic_csr_t {
virtual bool unlogged_write(const reg_t val) noexcept override;
private:
const reg_t hypervisor_exceptions;
const reg_t mmu_exceptions;
};

class sip_csr_t: public mip_proxy_csr_t {
Expand Down
Loading