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i=@fujitsu.com; q=dns/txt; s=fj2; t=1712459264; x=1743995264; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=TQOrXxVannumsVoHDhFB7VYp5NHkQwkKSHhgNKqzLNI=; b=UFHkjlnF/eXkMk3nSzRfUzP5DL3NKFYs4LCgksDnmhHbazu4Ow1DBhIj zGQkXiO37k4/Gf7Zttax1hwCKCBBvYQI3x2mFKZSR5247/liwXgAPlfzu la2GJX0MFrAz1u77WaNGABlbm5/SXnIR+MpfhE3cEQA+Tsht5Xq5rj30A 2mS+Zjkb1ldu10bof9Ry7ZzY/rzuEiHiokB2I1BJlHZQB15wDvQ8UdqFF 7uIOCkrkGbC+Mx+R+i0Ie7UbVJo0YUCT5WA4wurmNYZUL98Gx9Emed2eZ CbBivA04bgofyselUx79RNB+dcKV+qEBYmOHnWYsDg7fNToQjNtR9h7d2 g==; X-IronPort-AV: E=McAfee;i="6600,9927,11036"; a="154790421" X-IronPort-AV: E=Sophos;i="6.07,184,1708354800"; d="scan'208";a="154790421" To: jonathan.cameron@huawei.com, fan.ni@samsung.com Cc: qemu-devel@nongnu.org, Yao Xingtao Subject: [PATCH v2] mem/cxl_type3: support 3, 6, 12 and 16 interleave ways Date: Sat, 6 Apr 2024 23:06:42 -0400 Message-Id: <20240407030642.24861-1-yaoxt.fnst@fujitsu.com> X-Mailer: git-send-email 2.37.3 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-TM-AS-Product-Ver: IMSS-9.1.0.1417-9.0.0.1002-28302.004 X-TM-AS-User-Approved-Sender: Yes X-TMASE-Version: IMSS-9.1.0.1417-9.0.1002-28302.004 X-TMASE-Result: 10-1.243000-10.000000 X-TMASE-MatchedRID: 6atTV52QVSeROBVNmXUDuMIkzTqL3E/Wm0H2L3kjQgrn3ZLCt3rRSSNM v5a0AeBD77BjzUhRJQ6Ekl9vR6Agi4KeFxulmNWzCKFDk1kJexL4qCLIu0mtIMC5DTEMxpeQfiq 1gj2xET8qqtDuUtwyfGuaZ0FmNdhIehY/DCk+INEdahq+rGDn/1K6+0HOVoSoLEzDQUyQGVmDhN 38ME2RU7sWFv4pmSytnagtny7ZPcQfE8yM4pjsDwtuKBGekqUpnH7sbImOEBSc3i3mRmT5CmO6c nkZhdEeMhPmyJ78bM8iUTw6fgXIfuyxz+RSU6YXLwR4ex5wFyMy4qGi+Sd41OJEorgIJZ0Eod57 7dl+JEmbDRBqS2n66yzP5xAyz9Oenvkw4sh/+PcMX5CwH5DTUmgGZNLBHGNe X-TMASE-SNAP-Result: 1.821001.0001-0-1-22:0,33:0,34:0-0 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=207.54.90.49; envelope-from=yaoxt.fnst@fujitsu.com; helo=esa3.hc1455-7.c3s2.iphmx.com X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-to: Yao Xingtao From: Yao Xingtao via Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1712459317497100003 Content-Type: text/plain; charset="utf-8" Since the kernel does not check the interleave capability, a 3-way, 6-way, 12-way or 16-way region can be create normally. Applications can access the memory of 16-way region normally because qemu can convert hpa to dpa correctly for the power of 2 interleave ways, after kernel implementing the check, this kind of region will not be created any more. For non power of 2 interleave ways, applications could not access the memory normally and may occur some unexpected behaviors, such as segmentation fault. So implements this feature is needed. Link: https://lore.kernel.org/linux-cxl/3e84b919-7631-d1db-3e1d-33000f3f386= 8@fujitsu.com/ Signed-off-by: Yao Xingtao --- hw/mem/cxl_type3.c | 18 ++++++++++++++---- 1 file changed, 14 insertions(+), 4 deletions(-) diff --git a/hw/mem/cxl_type3.c b/hw/mem/cxl_type3.c index b0a7e9f11b..d6ef784e96 100644 --- a/hw/mem/cxl_type3.c +++ b/hw/mem/cxl_type3.c @@ -805,10 +805,17 @@ static bool cxl_type3_dpa(CXLType3Dev *ct3d, hwaddr h= ost_addr, uint64_t *dpa) continue; } =20 - *dpa =3D dpa_base + - ((MAKE_64BIT_MASK(0, 8 + ig) & hpa_offset) | - ((MAKE_64BIT_MASK(8 + ig + iw, 64 - 8 - ig - iw) & hpa_offset) - >> iw)); + if (iw < 8) { + *dpa =3D dpa_base + + ((MAKE_64BIT_MASK(0, 8 + ig) & hpa_offset) | + ((MAKE_64BIT_MASK(8 + ig + iw, 64 - 8 - ig - iw) & hpa_of= fset) + >> iw)); + } else { + *dpa =3D dpa_base + + ((MAKE_64BIT_MASK(0, 8 + ig) & hpa_offset) | + ((((MAKE_64BIT_MASK(ig + iw, 64 - ig - iw) & hpa_offset) + >> (ig + iw)) / 3) << (ig + 8))); + } =20 return true; } @@ -906,6 +913,9 @@ static void ct3d_reset(DeviceState *dev) uint32_t *write_msk =3D ct3d->cxl_cstate.crb.cache_mem_regs_write_mask; =20 cxl_component_register_init_common(reg_state, write_msk, CXL2_TYPE3_DE= VICE); + ARRAY_FIELD_DP32(reg_state, CXL_HDM_DECODER_CAPABILITY, 3_6_12_WAY, 1); + ARRAY_FIELD_DP32(reg_state, CXL_HDM_DECODER_CAPABILITY, 16_WAY, 1); + cxl_device_register_init_t3(ct3d); =20 /* --=20 2.37.3