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| author | Max Filippov <jcmvbkbc@gmail.com> | 2012-05-27 18:34:53 +0400 |
|---|---|---|
| committer | Michael Roth <mdroth@linux.vnet.ibm.com> | 2012-06-25 08:48:31 -0500 |
| commit | 8b3ac661208c88b9d424ede176b99be6fff1283e (patch) | |
| tree | f908f4de78bcd03815ea270b6bb0f5c17efda2a8 | |
| parent | 2eb4d314cef55749f7835f6338080895daed277e (diff) | |
| download | qemu-8b3ac661208c88b9d424ede176b99be6fff1283e.tar.gz | |
target-xtensa: control page table lookup explicitly
Hardware pagetable walking may not be nested. Stop guessing and pass
explicit flag to the get_physical_addr_mmu function that controls page
table lookup.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
(cherry picked from commit 57705a676c65e6ecacc44c23b192f3d7ed2cdedd)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
| -rw-r--r-- | target-xtensa/helper.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/target-xtensa/helper.c b/target-xtensa/helper.c index 86c33d2e6d..8ebef729bc 100644 --- a/target-xtensa/helper.c +++ b/target-xtensa/helper.c @@ -452,7 +452,8 @@ static int get_pte(CPUXtensaState *env, uint32_t vaddr, uint32_t *pte); static int get_physical_addr_mmu(CPUXtensaState *env, bool update_tlb, uint32_t vaddr, int is_write, int mmu_idx, - uint32_t *paddr, uint32_t *page_size, unsigned *access) + uint32_t *paddr, uint32_t *page_size, unsigned *access, + bool may_lookup_pt) { bool dtlb = is_write != 2; uint32_t wi; @@ -465,8 +466,7 @@ static int get_physical_addr_mmu(CPUXtensaState *env, bool update_tlb, int ret = xtensa_tlb_lookup(env, vaddr, dtlb, &wi, &ei, &ring); if ((ret == INST_TLB_MISS_CAUSE || ret == LOAD_STORE_TLB_MISS_CAUSE) && - (mmu_idx != 0 || ((vaddr ^ env->sregs[PTEVADDR]) & 0xffc00000)) && - get_pte(env, vaddr, &pte) == 0) { + may_lookup_pt && get_pte(env, vaddr, &pte) == 0) { ring = (pte >> 4) & 0x3; wi = 0; split_tlb_entry_spec_way(env, vaddr, dtlb, &vpn, wi, &ei); @@ -520,7 +520,7 @@ static int get_pte(CPUXtensaState *env, uint32_t vaddr, uint32_t *pte) uint32_t pt_vaddr = (env->sregs[PTEVADDR] | (vaddr >> 10)) & 0xfffffffc; int ret = get_physical_addr_mmu(env, false, pt_vaddr, 0, 0, - &paddr, &page_size, &access); + &paddr, &page_size, &access, false); qemu_log("%s: trying autorefill(%08x) -> %08x\n", __func__, vaddr, ret ? ~0 : paddr); @@ -568,7 +568,7 @@ int xtensa_get_physical_addr(CPUXtensaState *env, bool update_tlb, { if (xtensa_option_enabled(env->config, XTENSA_OPTION_MMU)) { return get_physical_addr_mmu(env, update_tlb, - vaddr, is_write, mmu_idx, paddr, page_size, access); + vaddr, is_write, mmu_idx, paddr, page_size, access, true); } else if (xtensa_option_bits_enabled(env->config, XTENSA_OPTION_BIT(XTENSA_OPTION_REGION_PROTECTION) | XTENSA_OPTION_BIT(XTENSA_OPTION_REGION_TRANSLATION))) { |