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[85.180.181.207]) by smtp.gmail.com with ESMTPSA id z6sm7158330wjt.24.2016.11.04.13.51.48 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 04 Nov 2016 13:51:48 -0700 (PDT) From: Artyom Tarasenko To: qemu-devel@nongnu.org Date: Fri, 4 Nov 2016 21:50:24 +0100 Message-Id: <85116641ed900a97d07e5ed91ea55bba330a14b2.1478291230.git.atar4qemu@gmail.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: References: In-Reply-To: References: X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 2a00:1450:400c:c09::241 Subject: [Qemu-devel] [PATCH v1 23/30] target-sparc: implement auto-demapping for UA2005 CPUs X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Cave-Ayland , Artyom Tarasenko , Richard Henderson Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Signed-off-by: Artyom Tarasenko --- target-sparc/ldst_helper.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/target-sparc/ldst_helper.c b/target-sparc/ldst_helper.c index 0447d4e..57b3b97 100644 --- a/target-sparc/ldst_helper.c +++ b/target-sparc/ldst_helper.c @@ -210,6 +210,28 @@ static void replace_tlb_1bit_lru(SparcTLBEntry *tlb, { unsigned int i, replace_used; + if (cpu_has_hypervisor(env1)) { + uint64_t new_vaddr = tlb_tag & ~0x1fffULL; + uint64_t new_size = 8192ULL << 3 * TTE_PGSIZE(tlb_tte); + uint32_t new_ctx = tlb_tag & 0x1fffU; + for (i = 0; i < 64; i++) { + uint32_t ctx = tlb[i].tag & 0x1fffU; + /* check if new mapping overlaps an existing one */ + if (new_ctx == ctx) { + uint64_t vaddr = tlb[i].tag & ~0x1fffULL; + uint64_t size = 8192ULL << 3 * TTE_PGSIZE(tlb[i].tte); + if (new_vaddr == vaddr + || (new_vaddr < vaddr + size + && vaddr < new_vaddr + new_size)) { + DPRINTF_MMU("auto demap entry [%d] %lx->%lx\n", i, vaddr, + new_vaddr); + replace_tlb_entry(&tlb[i], tlb_tag, tlb_tte, env1); + return; + } + } + + } + } /* Try replacing invalid entry */ for (i = 0; i < 64; i++) { if (!TTE_IS_VALID(tlb[i].tte)) {