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Tue, 16 Jul 2024 07:44:00 -0700 (PDT) Message-ID: Date: Tue, 16 Jul 2024 16:43:54 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: Problems in PV dom0 on recent x86 hardware To: Jason Andryuk Cc: "xen-devel@lists.xenproject.org" , =?UTF-8?Q?Roger_Pau_Monn=C3=A9?= , =?UTF-8?B?SsO8cmdlbiBHcm/Dnw==?= References: <6101999a-6f88-46cb-b850-af43b364f299@suse.com> <7a0a8b1c-69e0-435d-b4f4-7a9d784eab29@amd.com> <1f96a355-b0d2-4cc9-a2ae-6d3ab750136d@suse.com> <89d7b5a6-e971-4cd0-85df-0dd599d0ba1b@suse.com> <7d207d6c-d025-4fbb-8649-9c42224097f5@suse.com> <88db3cb6-2b7e-48b2-9bf4-d871067325a0@suse.com> <3d6d35ea-5044-4249-a277-0e5aa31ed888@amd.com> Content-Language: en-US From: Jan Beulich Autocrypt: addr=jbeulich@suse.com; keydata= xsDiBFk3nEQRBADAEaSw6zC/EJkiwGPXbWtPxl2xCdSoeepS07jW8UgcHNurfHvUzogEq5xk hu507c3BarVjyWCJOylMNR98Yd8VqD9UfmX0Hb8/BrA+Hl6/DB/eqGptrf4BSRwcZQM32aZK 7Pj2XbGWIUrZrd70x1eAP9QE3P79Y2oLrsCgbZJfEwCgvz9JjGmQqQkRiTVzlZVCJYcyGGsD /0tbFCzD2h20ahe8rC1gbb3K3qk+LpBtvjBu1RY9drYk0NymiGbJWZgab6t1jM7sk2vuf0Py O9Hf9XBmK0uE9IgMaiCpc32XV9oASz6UJebwkX+zF2jG5I1BfnO9g7KlotcA/v5ClMjgo6Gl MDY4HxoSRu3i1cqqSDtVlt+AOVBJBACrZcnHAUSuCXBPy0jOlBhxPqRWv6ND4c9PH1xjQ3NP nxJuMBS8rnNg22uyfAgmBKNLpLgAGVRMZGaGoJObGf72s6TeIqKJo/LtggAS9qAUiuKVnygo 3wjfkS9A3DRO+SpU7JqWdsveeIQyeyEJ/8PTowmSQLakF+3fote9ybzd880fSmFuIEJldWxp Y2ggPGpiZXVsaWNoQHN1c2UuY29tPsJgBBMRAgAgBQJZN5xEAhsDBgsJCAcDAgQVAggDBBYC AwECHgECF4AACgkQoDSui/t3IH4J+wCfQ5jHdEjCRHj23O/5ttg9r9OIruwAn3103WUITZee e7Sbg12UgcQ5lv7SzsFNBFk3nEQQCACCuTjCjFOUdi5Nm244F+78kLghRcin/awv+IrTcIWF hUpSs1Y91iQQ7KItirz5uwCPlwejSJDQJLIS+QtJHaXDXeV6NI0Uef1hP20+y8qydDiVkv6l IreXjTb7DvksRgJNvCkWtYnlS3mYvQ9NzS9PhyALWbXnH6sIJd2O9lKS1Mrfq+y0IXCP10eS FFGg+Av3IQeFatkJAyju0PPthyTqxSI4lZYuJVPknzgaeuJv/2NccrPvmeDg6Coe7ZIeQ8Yj t0ARxu2xytAkkLCel1Lz1WLmwLstV30g80nkgZf/wr+/BXJW/oIvRlonUkxv+IbBM3dX2OV8 AmRv1ySWPTP7AAMFB/9PQK/VtlNUJvg8GXj9ootzrteGfVZVVT4XBJkfwBcpC/XcPzldjv+3 HYudvpdNK3lLujXeA5fLOH+Z/G9WBc5pFVSMocI71I8bT8lIAzreg0WvkWg5V2WZsUMlnDL9 mpwIGFhlbM3gfDMs7MPMu8YQRFVdUvtSpaAs8OFfGQ0ia3LGZcjA6Ik2+xcqscEJzNH+qh8V m5jjp28yZgaqTaRbg3M/+MTbMpicpZuqF4rnB0AQD12/3BNWDR6bmh+EkYSMcEIpQmBM51qM EKYTQGybRCjpnKHGOxG0rfFY1085mBDZCH5Kx0cl0HVJuQKC+dV2ZY5AqjcKwAxpE75MLFkr wkkEGBECAAkFAlk3nEQCGwwACgkQoDSui/t3IH7nnwCfcJWUDUFKdCsBH/E5d+0ZnMQi+G0A nAuWpQkjM1ASeQwSHEeAWPgskBQL In-Reply-To: <3d6d35ea-5044-4249-a277-0e5aa31ed888@amd.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit On 09.07.2024 15:08, Jason Andryuk wrote: > On 2024-07-09 06:56, Jürgen Groß wrote: >> On 09.07.24 09:01, Jan Beulich wrote: >>> On 09.07.2024 08:36, Jürgen Groß wrote: >>>> On 09.07.24 08:24, Jan Beulich wrote: >>>>> On 08.07.2024 23:30, Jason Andryuk wrote: >>>>>>    From the backtrace, it looks like the immediate case is just >>>>>> trying to >>>>>> read a 4-byte version: >>>>>> >>>>>>    >>>> [   44.575541]  ucsi_acpi_dsm+0x53/0x80 >>>>>>    >>>> [   44.575546]  ucsi_acpi_read+0x2e/0x60 >>>>>>    >>>> [   44.575550]  ucsi_register+0x24/0xa0 >>>>>>    >>>> [   44.575555]  ucsi_acpi_probe+0x162/0x1e3 >>>>>> >>>>>> int ucsi_register(struct ucsi *ucsi) >>>>>> { >>>>>>            int ret; >>>>>> >>>>>>            ret = ucsi->ops->read(ucsi, UCSI_VERSION, &ucsi->version, >>>>>>                                  sizeof(ucsi->version)); >>>>>> >>>>>> ->read being ucsi_acpi_read() >>>>>> >>>>>> However, the driver also appears write to adjacent addresses. >>>>> >>>>> There are also corresponding write functions in the driver, yes, but >>>>> ucsi_acpi_async_write() (used directly or indirectly) similarly calls >>>>> ucsi_acpi_dsm(), which wires through to acpi_evaluate_dsm(). That's >>>>> ACPI object evaluation, which isn't obvious without seeing the >>>>> involved AML whether it might write said memory region. >>>> >>>> I guess an ACPI dump would help here? >>> >>> Perhaps, yes. >> >> It is available in the bug report: >> >> https://bugzilla.opensuse.org/show_bug.cgi?id=1227301 > > After acpixtract & iasl: > > $ grep -ir FEEC * > dsdt.dsl: OperationRegion (ECMM, SystemMemory, 0xFEEC2000, 0x0100) > ssdt16.dsl: OperationRegion (SUSC, SystemMemory, 0xFEEC2100, 0x30) As I look to have only flawed variants of acpixtract to hand, any chance you could supply me with dsdt.dsl and all ssdt*.dsl that you successfully extracted / disassembled? Thanks, Jan > from the DSDT: > Scope (\_SB.PCI0.LPC0.EC0) > { > OperationRegion (ECMM, SystemMemory, 0xFEEC2000, 0x0100) > Field (ECMM, AnyAcc, Lock, Preserve) > { > TWBT, 2048 > } > > Name (BTBF, Buffer (0x0100) > { > 0x00 // . > }) > Method (BTIF, 0, NotSerialized) > { > BTBF = TWBT /* \_SB_.PCI0.LPC0.EC0_.TWBT */ > Return (BTBF) /* \_SB_.PCI0.LPC0.EC0_.BTBF */ > } > } > > From SSDT16: > DefinitionBlock ("", "SSDT", 2, "LENOVO", "UsbCTabl", 0x00000001) > { > External (_SB_.PCI0.LPC0.EC0_, DeviceObj) > > Scope (\_SB) > { > OperationRegion (SUSC, SystemMemory, 0xFEEC2100, 0x30) > Field (SUSC, ByteAcc, Lock, Preserve) > { > > > This embedded controller (?) seems to live at 0xfeec2xxx. > > Regards, > Jason