diff for duplicates of <b1556461-fe83-2ba0-00a3-e8ecf3e286fe@amd.com> diff --git a/a/1.txt b/N1/1.txt index 46a2c77..9f0694d 100644 --- a/a/1.txt +++ b/N1/1.txt @@ -210,7 +210,3 @@ Tom >>> Thanks >>> Dave >>> -_______________________________________________ -kexec mailing list -kexec@lists.infradead.org -http://lists.infradead.org/mailman/listinfo/kexec diff --git a/a/content_digest b/N1/content_digest index fe0fb7a..fbca737 100644 --- a/a/content_digest +++ b/N1/content_digest @@ -7,25 +7,22 @@ "Subject\0Re: [PATCH 1/2 v8] resource: add the new I/O resource descriptor 'IORES_DESC_RESERVED'\0" "Date\0Mon, 25 Mar 2019 19:34:25 +0000\0" "To\0lijiang <lijiang@redhat.com>\0" - "Cc\0tony.luck@intel.com <tony.luck@intel.com>" - fenghua.yu@intel.com <fenghua.yu@intel.com> - linux-efi@vger.kernel.org <linux-efi@vger.kernel.org> - linux-ia64@vger.kernel.org <linux-ia64@vger.kernel.org> - bhe@redhat.com <bhe@redhat.com> - ard.biesheuvel@linaro.org <ard.biesheuvel@linaro.org> - peterz@infradead.org <peterz@infradead.org> - x86@kernel.org <x86@kernel.org> - kexec@lists.infradead.org <kexec@lists.infradead.org> + "Cc\0Dave Young <dyoung@redhat.com>" linux-kernel@vger.kernel.org <linux-kernel@vger.kernel.org> - dave.hansen@linux.intel.com <dave.hansen@linux.intel.com> + kexec@lists.infradead.org <kexec@lists.infradead.org> + x86@kernel.org <x86@kernel.org> + linux-ia64@vger.kernel.org <linux-ia64@vger.kernel.org> + linux-efi@vger.kernel.org <linux-efi@vger.kernel.org> + tglx@linutronix.de <tglx@linutronix.de> mingo@redhat.com <mingo@redhat.com> bp@alien8.de <bp@alien8.de> - luto@kernel.org <luto@kernel.org> - Toshi Kani <toshi.kani@hp.com> - tglx@linutronix.de <tglx@linutronix.de> - Dave Young <dyoung@redhat.com> akpm@linux-foundation.org <akpm@linux-foundation.org> - " Dan Williams <dan.j.williams@intel.com>\0" + dave.hansen@linux.intel.com <dave.hansen@linux.intel.com> + luto@kernel.org <luto@kernel.org> + peterz@infradead.org <peterz@infradead.org> + ard.biesheuvel@linaro.org <ard.biesheuvel@linaro.org> + tony.luck@intel.com <tony.luck@intel.com> + " fenghua.yu@intel.com <fenghua.yu@intel.com>\0" "\00:1\0" "b\0" "On 3/16/19 2:31 AM, lijiang wrote:\n" @@ -239,10 +236,6 @@ ">>>\n" ">>> Thanks\n" ">>> Dave\n" - ">>>\n" - "_______________________________________________\n" - "kexec mailing list\n" - "kexec@lists.infradead.org\n" - http://lists.infradead.org/mailman/listinfo/kexec + >>> -ff965eea65527701cd608ec84a473941b9d8cda1e1926affaae7e799cf561028 +4369b7ca9ddeaa3ded331040145dbfbd0c23648199f54d72d564cfc258d25f3f
diff --git a/a/1.txt b/N2/1.txt index 46a2c77..b83afef 100644 --- a/a/1.txt +++ b/N2/1.txt @@ -1,216 +1,150 @@ -On 3/16/19 2:31 AM, lijiang wrote: -> -> -> 在 2018年12月05日 05:33, Lendacky, Thomas 写道: ->> On 11/29/2018 09:37 PM, Dave Young wrote: ->>> + more people ->>> ->>> On 11/29/18 at 04:09pm, Lianbo Jiang wrote: ->>>> When doing kexec_file_load, the first kernel needs to pass the e820 ->>>> reserved ranges to the second kernel. But kernel can not exactly ->>>> match the e820 reserved ranges when walking through the iomem resources ->>>> with the descriptor 'IORES_DESC_NONE', because several e820 types( ->>>> e.g. E820_TYPE_RESERVED_KERN/E820_TYPE_RAM/E820_TYPE_UNUSABLE/E820 ->>>> _TYPE_RESERVED) are converted to the descriptor 'IORES_DESC_NONE'. It ->>>> may pass these four types to the kdump kernel, that is not desired result. ->>>> ->>>> So, this patch adds a new I/O resource descriptor 'IORES_DESC_RESERVED' ->>>> for the iomem resources search interfaces. It is helpful to exactly ->>>> match the reserved resource ranges when walking through iomem resources. ->>>> ->>>> In addition, since the new descriptor 'IORES_DESC_RESERVED' is introduced, ->>>> these code originally related to the descriptor 'IORES_DESC_NONE' need to ->>>> be updated. Otherwise, it will be easily confused and also cause some ->>>> errors. Because the 'E820_TYPE_RESERVED' type is converted to the new ->>>> descriptor 'IORES_DESC_RESERVED' instead of 'IORES_DESC_NONE', it has been ->>>> changed. ->>>> ->>>> Suggested-by: Dave Young <dyoung@redhat.com> ->>>> Signed-off-by: Lianbo Jiang <lijiang@redhat.com> ->>>> --- ->>>> arch/ia64/kernel/efi.c | 4 ++++ ->>>> arch/x86/kernel/e820.c | 2 +- ->>>> arch/x86/mm/ioremap.c | 13 ++++++++++++- ->>>> include/linux/ioport.h | 1 + ->>>> kernel/resource.c | 6 +++--- ->>>> 5 files changed, 21 insertions(+), 5 deletions(-) ->>>> ->>>> diff --git a/arch/ia64/kernel/efi.c b/arch/ia64/kernel/efi.c ->>>> index 8f106638913c..1841e9b4db30 100644 ->>>> --- a/arch/ia64/kernel/efi.c ->>>> +++ b/arch/ia64/kernel/efi.c ->>>> @@ -1231,6 +1231,10 @@ efi_initialize_iomem_resources(struct resource *code_resource, ->>>> break; ->>>> ->>>> case EFI_RESERVED_TYPE: ->>>> + name = "reserved"; ->>> ->>> Ingo updated X86 code to use "Reserved", I think it would be good to do ->>> same for this case as well ->>> ->>>> + desc = IORES_DESC_RESERVED; ->>>> + break; ->>>> + ->>>> case EFI_RUNTIME_SERVICES_CODE: ->>>> case EFI_RUNTIME_SERVICES_DATA: ->>>> case EFI_ACPI_RECLAIM_MEMORY: ->>> ->>> Originally, above 3 are all "reserved", so probably they all should be ->>> IORES_DESC_RESERVED. ->>> ->>> Can any IA64 people to review this? ->>> ->>>> diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c ->>>> index 50895c2f937d..57fafdafb860 100644 ->>>> --- a/arch/x86/kernel/e820.c ->>>> +++ b/arch/x86/kernel/e820.c ->>>> @@ -1048,10 +1048,10 @@ static unsigned long __init e820_type_to_iores_desc(struct e820_entry *entry) ->>>> case E820_TYPE_NVS: return IORES_DESC_ACPI_NV_STORAGE; ->>>> case E820_TYPE_PMEM: return IORES_DESC_PERSISTENT_MEMORY; ->>>> case E820_TYPE_PRAM: return IORES_DESC_PERSISTENT_MEMORY_LEGACY; ->>>> + case E820_TYPE_RESERVED: return IORES_DESC_RESERVED; ->>>> case E820_TYPE_RESERVED_KERN: /* Fall-through: */ ->>>> case E820_TYPE_RAM: /* Fall-through: */ ->>>> case E820_TYPE_UNUSABLE: /* Fall-through: */ ->>>> - case E820_TYPE_RESERVED: /* Fall-through: */ ->>>> default: return IORES_DESC_NONE; ->>>> } ->>>> } ->>>> diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c ->>>> index 5378d10f1d31..fea2ef99415d 100644 ->>>> --- a/arch/x86/mm/ioremap.c ->>>> +++ b/arch/x86/mm/ioremap.c ->>>> @@ -83,7 +83,18 @@ static bool __ioremap_check_ram(struct resource *res) ->>>> ->>>> static int __ioremap_check_desc_other(struct resource *res) ->>>> { ->>>> - return (res->desc != IORES_DESC_NONE); ->>>> + /* ->>>> + * But now, the 'E820_TYPE_RESERVED' type is converted to the new ->>>> + * descriptor 'IORES_DESC_RESERVED' instead of 'IORES_DESC_NONE', ->>>> + * it has been changed. And the value of 'mem_flags.desc_other' ->>>> + * is equal to 'true' if we don't strengthen the condition in this ->>>> + * function, that is wrong. Because originally it is equal to ->>>> + * 'false' for the same reserved type. ->>>> + * ->>>> + * So, that would be nice to keep it the same as before. ->>>> + */ ->>>> + return ((res->desc != IORES_DESC_NONE) && ->>>> + (res->desc != IORES_DESC_RESERVED)); ->>>> } ->>> ->>> Added Tom since he added the check function. Is it possible to only ->>> check explict valid desc types instead of exclude IORES_DESC_NONE? ->> ->> Sorry for the delay... ->> ->> The original intent of the check was to map most memory as encrypted under ->> SEV if it was marked with a specific descriptor, since it was likely to ->> not be MMIO. I tried converting most things that mapped memory to memremap ->> vs ioremap, but ACPI was one area that I left alone and this check catches ->> the mapping of the ACPI tables. I suppose it's possible to change this to ->> check just for IORES_DESC_ACPI_* values, but I would have to do some ->> testing. -> -> Recently, i tested it according to your advice, here it is really checking for the -> 'IORES_DESC_ACPI_*' values. If you agree to this change, i would add the following -> patch into this patch set and post them again. -> -> [root@localhost linux]# git diff arch/x86/mm/ioremap.c -> diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c -> index 0029604af8a4..0e3ba620612d 100644 -> --- a/arch/x86/mm/ioremap.c -> +++ b/arch/x86/mm/ioremap.c -> @@ -83,7 +83,8 @@ static bool __ioremap_check_ram(struct resource *res) -> -> static int __ioremap_check_desc_other(struct resource *res) -> { -> - return (res->desc != IORES_DESC_NONE); -> + return ((res->desc == IORES_DESC_ACPI_TABLES) || -> + (res->desc == IORES_DESC_ACPI_NV_STORAGE)); - -I'm not a big fan of this. I think you should leave it as the previous -check you had for IORES_DESC_NONE and IORES_DESC_RESERVED. There's no -telling what type of resources may be mapped in the future where this -will break. - -Adding a nice comment here about how IORES_DESC_NONE originally was to -identify MMIO and reserved areas. Now IORES_DESC_RESERVED has been created -for the reserved areas so the check needs to be expanded so that these -areas aren't mapped encrypted when using ioremap. - -Thanks, -Tom - -> } -> -> -> Thanks. -> Lianbo -> ->> ->> Thanks, ->> Tom ->> ->>> ->>>> ->>>> static int __ioremap_res_check(struct resource *res, void *arg) ->>>> diff --git a/include/linux/ioport.h b/include/linux/ioport.h ->>>> index da0ebaec25f0..6ed59de48bd5 100644 ->>>> --- a/include/linux/ioport.h ->>>> +++ b/include/linux/ioport.h ->>>> @@ -133,6 +133,7 @@ enum { ->>>> IORES_DESC_PERSISTENT_MEMORY_LEGACY = 5, ->>>> IORES_DESC_DEVICE_PRIVATE_MEMORY = 6, ->>>> IORES_DESC_DEVICE_PUBLIC_MEMORY = 7, ->>>> + IORES_DESC_RESERVED = 8, ->>>> }; ->>>> ->>>> /* helpers to define resources */ ->>>> diff --git a/kernel/resource.c b/kernel/resource.c ->>>> index b0fbf685c77a..f34a632c4169 100644 ->>>> --- a/kernel/resource.c ->>>> +++ b/kernel/resource.c ->>>> @@ -994,7 +994,7 @@ __reserve_region_with_split(struct resource *root, resource_size_t start, ->>>> res->start = start; ->>>> res->end = end; ->>>> res->flags = type | IORESOURCE_BUSY; ->>>> - res->desc = IORES_DESC_NONE; ->>>> + res->desc = IORES_DESC_RESERVED; ->>>> ->>>> while (1) { ->>>> ->>>> @@ -1029,7 +1029,7 @@ __reserve_region_with_split(struct resource *root, resource_size_t start, ->>>> next_res->start = conflict->end + 1; ->>>> next_res->end = end; ->>>> next_res->flags = type | IORESOURCE_BUSY; ->>>> - next_res->desc = IORES_DESC_NONE; ->>>> + next_res->desc = IORES_DESC_RESERVED; ->>>> } ->>>> } else { ->>>> res->start = conflict->end + 1; ->>>> @@ -1477,7 +1477,7 @@ static int __init reserve_setup(char *str) ->>>> res->start = io_start; ->>>> res->end = io_start + io_num - 1; ->>>> res->flags |= IORESOURCE_BUSY; ->>>> - res->desc = IORES_DESC_NONE; ->>>> + res->desc = IORES_DESC_RESERVED; ->>>> res->child = NULL; ->>>> if (request_resource(parent, res) == 0) ->>>> reserved = x+1; ->>>> -- ->>>> 2.17.1 ->>>> ->>> ->>> ->>> There are a lot of places call region_intersects which use DESC_NONE, ->>> I'm not sure if needed changes accordingly. Cced Dan and Toshi. ->>> ->>> ->>> Thanks ->>> Dave ->>> -_______________________________________________ -kexec mailing list -kexec@lists.infradead.org -http://lists.infradead.org/mailman/listinfo/kexec +T24gMy8xNi8xOSAyOjMxIEFNLCBsaWppYW5nIHdyb3RlOg0KPiANCj4gDQo+IOWcqCAyMDE45bm0 +MTLmnIgwNeaXpSAwNTozMywgTGVuZGFja3ksIFRob21hcyDlhpnpgZM6DQo+PiBPbiAxMS8yOS8y +MDE4IDA5OjM3IFBNLCBEYXZlIFlvdW5nIHdyb3RlOg0KPj4+ICsgbW9yZSBwZW9wbGUNCj4+Pg0K +Pj4+IE9uIDExLzI5LzE4IGF0IDA0OjA5cG0sIExpYW5ibyBKaWFuZyB3cm90ZToNCj4+Pj4gV2hl +biBkb2luZyBrZXhlY19maWxlX2xvYWQsIHRoZSBmaXJzdCBrZXJuZWwgbmVlZHMgdG8gcGFzcyB0 +aGUgZTgyMA0KPj4+PiByZXNlcnZlZCByYW5nZXMgdG8gdGhlIHNlY29uZCBrZXJuZWwuIEJ1dCBr +ZXJuZWwgY2FuIG5vdCBleGFjdGx5DQo+Pj4+IG1hdGNoIHRoZSBlODIwIHJlc2VydmVkIHJhbmdl +cyB3aGVuIHdhbGtpbmcgdGhyb3VnaCB0aGUgaW9tZW0gcmVzb3VyY2VzDQo+Pj4+IHdpdGggdGhl +IGRlc2NyaXB0b3IgJ0lPUkVTX0RFU0NfTk9ORScsIGJlY2F1c2Ugc2V2ZXJhbCBlODIwIHR5cGVz +KA0KPj4+PiBlLmcuIEU4MjBfVFlQRV9SRVNFUlZFRF9LRVJOL0U4MjBfVFlQRV9SQU0vRTgyMF9U 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<linux-efi@vger.kernel.org> - linux-ia64@vger.kernel.org <linux-ia64@vger.kernel.org> - bhe@redhat.com <bhe@redhat.com> - ard.biesheuvel@linaro.org <ard.biesheuvel@linaro.org> - peterz@infradead.org <peterz@infradead.org> - x86@kernel.org <x86@kernel.org> - kexec@lists.infradead.org <kexec@lists.infradead.org> + "Cc\0Dave Young <dyoung@redhat.com>" linux-kernel@vger.kernel.org <linux-kernel@vger.kernel.org> - dave.hansen@linux.intel.com <dave.hansen@linux.intel.com> + kexec@lists.infradead.org <kexec@lists.infradead.org> + x86@kernel.org <x86@kernel.org> + linux-ia64@vger.kernel.org <linux-ia64@vger.kernel.org> + linux-efi@vger.kernel.org <linux-efi@vger.kernel.org> + tglx@linutronix.de <tglx@linutronix.de> mingo@redhat.com <mingo@redhat.com> bp@alien8.de <bp@alien8.de> + akpm@linux-foundation.org <akpm@linux-foundation.org> + dave.hansen@linux.intel.com <dave.hansen@linux.intel.com> luto@kernel.org <luto@kernel.org> + peterz@infradead.org <peterz@infradead.org> + ard.biesheuvel@linaro.org <ard.biesheuvel@linaro.org> + tony.luck@intel.com <tony.luck@intel.com> + fenghua.yu@intel.com <fenghua.yu@intel.com> + bhe@redhat.com <bhe@redhat.com> Toshi Kani <toshi.kani@hp.com> - tglx@linutronix.de <tglx@linutronix.de> - Dave Young <dyoung@redhat.com> - akpm@linux-foundation.org <akpm@linux-foundation.org> " Dan Williams <dan.j.williams@intel.com>\0" "\00:1\0" "b\0" - "On 3/16/19 2:31 AM, lijiang wrote:\n" - "> \n" - "> \n" - "> \345\234\250 2018\345\271\26412\346\234\21005\346\227\245 05:33, Lendacky, Thomas \345\206\231\351\201\223:\n" - ">> On 11/29/2018 09:37 PM, Dave Young wrote:\n" - ">>> + more people\n" - ">>>\n" - ">>> On 11/29/18 at 04:09pm, Lianbo Jiang wrote:\n" - ">>>> When doing kexec_file_load, the first kernel needs to pass the e820\n" - ">>>> reserved ranges to the second kernel. But kernel can not exactly\n" - ">>>> match the e820 reserved ranges when walking through the iomem resources\n" - ">>>> with the descriptor 'IORES_DESC_NONE', because several e820 types(\n" - ">>>> e.g. E820_TYPE_RESERVED_KERN/E820_TYPE_RAM/E820_TYPE_UNUSABLE/E820\n" - ">>>> _TYPE_RESERVED) are converted to the descriptor 'IORES_DESC_NONE'. It\n" - ">>>> may pass these four types to the kdump kernel, that is not desired result.\n" - ">>>>\n" - ">>>> So, this patch adds a new I/O resource descriptor 'IORES_DESC_RESERVED'\n" - ">>>> for the iomem resources search interfaces. It is helpful to exactly\n" - ">>>> match the reserved resource ranges when walking through iomem resources.\n" - ">>>>\n" - ">>>> In addition, since the new descriptor 'IORES_DESC_RESERVED' is introduced,\n" - ">>>> these code originally related to the descriptor 'IORES_DESC_NONE' need to\n" - ">>>> be updated. Otherwise, it will be easily confused and also cause some\n" - ">>>> errors. Because the 'E820_TYPE_RESERVED' type is converted to the new\n" - ">>>> descriptor 'IORES_DESC_RESERVED' instead of 'IORES_DESC_NONE', it has been\n" - ">>>> changed.\n" - ">>>>\n" - ">>>> Suggested-by: Dave Young <dyoung@redhat.com>\n" - ">>>> Signed-off-by: Lianbo Jiang <lijiang@redhat.com>\n" - ">>>> ---\n" - ">>>> arch/ia64/kernel/efi.c | 4 ++++\n" - ">>>> arch/x86/kernel/e820.c | 2 +-\n" - ">>>> arch/x86/mm/ioremap.c | 13 ++++++++++++-\n" - ">>>> include/linux/ioport.h | 1 +\n" - ">>>> kernel/resource.c | 6 +++---\n" - ">>>> 5 files changed, 21 insertions(+), 5 deletions(-)\n" - ">>>>\n" - ">>>> diff --git a/arch/ia64/kernel/efi.c b/arch/ia64/kernel/efi.c\n" - ">>>> index 8f106638913c..1841e9b4db30 100644\n" - ">>>> --- a/arch/ia64/kernel/efi.c\n" - ">>>> +++ b/arch/ia64/kernel/efi.c\n" - ">>>> @@ -1231,6 +1231,10 @@ efi_initialize_iomem_resources(struct resource *code_resource,\n" - ">>>> \t\t\t\tbreak;\n" - ">>>> \n" - ">>>> \t\t\tcase EFI_RESERVED_TYPE:\n" - ">>>> +\t\t\t\tname = \"reserved\";\n" - ">>>\n" - ">>> Ingo updated X86 code to use \"Reserved\", I think it would be good to do\n" - ">>> same for this case as well\n" - ">>>\n" - ">>>> +\t\t\t\tdesc = IORES_DESC_RESERVED;\n" - ">>>> +\t\t\t\tbreak;\n" - ">>>> +\n" - ">>>> \t\t\tcase EFI_RUNTIME_SERVICES_CODE:\n" - ">>>> \t\t\tcase EFI_RUNTIME_SERVICES_DATA:\n" - ">>>> \t\t\tcase EFI_ACPI_RECLAIM_MEMORY:\n" - ">>>\n" - ">>> Originally, above 3 are all \"reserved\", so probably they all should be\n" - ">>> IORES_DESC_RESERVED.\n" - ">>>\n" - ">>> Can any IA64 people to review this?\n" - ">>>\n" - ">>>> diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c\n" - ">>>> index 50895c2f937d..57fafdafb860 100644\n" - ">>>> --- a/arch/x86/kernel/e820.c\n" - ">>>> +++ b/arch/x86/kernel/e820.c\n" - ">>>> @@ -1048,10 +1048,10 @@ static unsigned long __init e820_type_to_iores_desc(struct e820_entry *entry)\n" - ">>>> \tcase E820_TYPE_NVS:\t\treturn IORES_DESC_ACPI_NV_STORAGE;\n" - ">>>> \tcase E820_TYPE_PMEM:\t\treturn IORES_DESC_PERSISTENT_MEMORY;\n" - ">>>> \tcase E820_TYPE_PRAM:\t\treturn IORES_DESC_PERSISTENT_MEMORY_LEGACY;\n" - ">>>> +\tcase E820_TYPE_RESERVED:\treturn IORES_DESC_RESERVED;\n" - ">>>> \tcase E820_TYPE_RESERVED_KERN:\t/* Fall-through: */\n" - ">>>> \tcase E820_TYPE_RAM:\t\t/* Fall-through: */\n" - ">>>> \tcase E820_TYPE_UNUSABLE:\t/* Fall-through: */\n" - ">>>> -\tcase E820_TYPE_RESERVED:\t/* Fall-through: */\n" - ">>>> \tdefault:\t\t\treturn IORES_DESC_NONE;\n" - ">>>> \t}\n" - ">>>> }\n" - ">>>> diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c\n" - ">>>> index 5378d10f1d31..fea2ef99415d 100644\n" - ">>>> --- a/arch/x86/mm/ioremap.c\n" - ">>>> +++ b/arch/x86/mm/ioremap.c\n" - ">>>> @@ -83,7 +83,18 @@ static bool __ioremap_check_ram(struct resource *res)\n" - ">>>> \n" - ">>>> static int __ioremap_check_desc_other(struct resource *res)\n" - ">>>> {\n" - ">>>> -\treturn (res->desc != IORES_DESC_NONE);\n" - ">>>> +\t/*\n" - ">>>> +\t * But now, the 'E820_TYPE_RESERVED' type is converted to the new\n" - ">>>> +\t * descriptor 'IORES_DESC_RESERVED' instead of 'IORES_DESC_NONE',\n" - ">>>> +\t * it has been changed. And the value of 'mem_flags.desc_other'\n" - ">>>> +\t * is equal to 'true' if we don't strengthen the condition in this\n" - ">>>> +\t * function, that is wrong. Because originally it is equal to\n" - ">>>> +\t * 'false' for the same reserved type.\n" - ">>>> +\t *\n" - ">>>> +\t * So, that would be nice to keep it the same as before.\n" - ">>>> +\t */\n" - ">>>> +\treturn ((res->desc != IORES_DESC_NONE) &&\n" - ">>>> +\t\t(res->desc != IORES_DESC_RESERVED));\n" - ">>>> }\n" - ">>>\n" - ">>> Added Tom since he added the check function. Is it possible to only\n" - ">>> check explict valid desc types instead of exclude IORES_DESC_NONE?\n" - ">>\n" - ">> Sorry for the delay...\n" - ">>\n" - ">> The original intent of the check was to map most memory as encrypted under\n" - ">> SEV if it was marked with a specific descriptor, since it was likely to\n" - ">> not be MMIO. I tried converting most things that mapped memory to memremap\n" - ">> vs ioremap, but ACPI was one area that I left alone and this check catches\n" - ">> the mapping of the ACPI tables. I suppose it's possible to change this to\n" - ">> check just for IORES_DESC_ACPI_* values, but I would have to do some\n" - ">> testing.\n" - "> \n" - "> Recently, i tested it according to your advice, here it is really checking for the\n" - "> 'IORES_DESC_ACPI_*' values. If you agree to this change, i would add the following\n" - "> patch into this patch set and post them again.\n" - "> \n" - "> [root@localhost linux]# git diff arch/x86/mm/ioremap.c\n" - "> diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c\n" - "> index 0029604af8a4..0e3ba620612d 100644\n" - "> --- a/arch/x86/mm/ioremap.c\n" - "> +++ b/arch/x86/mm/ioremap.c\n" - "> @@ -83,7 +83,8 @@ static bool __ioremap_check_ram(struct resource *res)\n" - "> \n" - "> static int __ioremap_check_desc_other(struct resource *res)\n" - "> {\n" - "> - return (res->desc != IORES_DESC_NONE);\n" - "> + return ((res->desc == IORES_DESC_ACPI_TABLES) ||\n" - "> + (res->desc == IORES_DESC_ACPI_NV_STORAGE));\n" - "\n" - "I'm not a big fan of this. I think you should leave it as the previous\n" - "check you had for IORES_DESC_NONE and IORES_DESC_RESERVED. There's no\n" - "telling what type of resources may be mapped in the future where this\n" - "will break.\n" - "\n" - "Adding a nice comment here about how IORES_DESC_NONE originally was to\n" - "identify MMIO and reserved areas. Now IORES_DESC_RESERVED has been created\n" - "for the reserved areas so the check needs to be expanded so that these\n" - "areas aren't mapped encrypted when using ioremap.\n" - "\n" - "Thanks,\n" - "Tom\n" - "\n" - "> }\n" - "> \n" - "> \n" - "> Thanks.\n" - "> Lianbo\n" - "> \n" - ">>\n" - ">> Thanks,\n" - ">> Tom\n" - ">>\n" - ">>>\n" - ">>>> \n" - ">>>> static int __ioremap_res_check(struct resource *res, void *arg)\n" - ">>>> diff --git a/include/linux/ioport.h b/include/linux/ioport.h\n" - ">>>> index da0ebaec25f0..6ed59de48bd5 100644\n" - ">>>> --- a/include/linux/ioport.h\n" - ">>>> +++ b/include/linux/ioport.h\n" - ">>>> @@ -133,6 +133,7 @@ enum {\n" - ">>>> \tIORES_DESC_PERSISTENT_MEMORY_LEGACY\t= 5,\n" - ">>>> \tIORES_DESC_DEVICE_PRIVATE_MEMORY\t= 6,\n" - ">>>> \tIORES_DESC_DEVICE_PUBLIC_MEMORY\t\t= 7,\n" - ">>>> +\tIORES_DESC_RESERVED\t\t\t= 8,\n" - ">>>> };\n" - ">>>> \n" - ">>>> /* helpers to define resources */\n" - ">>>> diff --git a/kernel/resource.c b/kernel/resource.c\n" - ">>>> index b0fbf685c77a..f34a632c4169 100644\n" - ">>>> --- a/kernel/resource.c\n" - ">>>> +++ b/kernel/resource.c\n" - ">>>> @@ -994,7 +994,7 @@ __reserve_region_with_split(struct resource *root, resource_size_t start,\n" - ">>>> \tres->start = start;\n" - ">>>> \tres->end = end;\n" - ">>>> \tres->flags = type | IORESOURCE_BUSY;\n" - ">>>> -\tres->desc = IORES_DESC_NONE;\n" - ">>>> +\tres->desc = IORES_DESC_RESERVED;\n" - ">>>> \n" - ">>>> \twhile (1) {\n" - ">>>> \n" - ">>>> @@ -1029,7 +1029,7 @@ __reserve_region_with_split(struct resource *root, resource_size_t start,\n" - ">>>> \t\t\t\tnext_res->start = conflict->end + 1;\n" - ">>>> \t\t\t\tnext_res->end = end;\n" - ">>>> \t\t\t\tnext_res->flags = type | IORESOURCE_BUSY;\n" - ">>>> -\t\t\t\tnext_res->desc = IORES_DESC_NONE;\n" - ">>>> +\t\t\t\tnext_res->desc = IORES_DESC_RESERVED;\n" - ">>>> \t\t\t}\n" - ">>>> \t\t} else {\n" - ">>>> \t\t\tres->start = conflict->end + 1;\n" - ">>>> @@ -1477,7 +1477,7 @@ static int __init reserve_setup(char *str)\n" - ">>>> \t\t\tres->start = io_start;\n" - ">>>> \t\t\tres->end = io_start + io_num - 1;\n" - ">>>> \t\t\tres->flags |= IORESOURCE_BUSY;\n" - ">>>> -\t\t\tres->desc = IORES_DESC_NONE;\n" - ">>>> +\t\t\tres->desc = IORES_DESC_RESERVED;\n" - ">>>> \t\t\tres->child = NULL;\n" - ">>>> \t\t\tif (request_resource(parent, res) == 0)\n" - ">>>> \t\t\t\treserved = x+1;\n" - ">>>> -- \n" - ">>>> 2.17.1\n" - ">>>>\n" - ">>>\n" - ">>>\n" - ">>> There are a lot of places call region_intersects which use DESC_NONE,\n" - ">>> I'm not sure if needed changes accordingly. Cced Dan and Toshi.\n" - ">>>\n" - ">>>\n" - ">>> Thanks\n" - ">>> Dave\n" - ">>>\n" - "_______________________________________________\n" - "kexec mailing list\n" - "kexec@lists.infradead.org\n" - http://lists.infradead.org/mailman/listinfo/kexec + "T24gMy8xNi8xOSAyOjMxIEFNLCBsaWppYW5nIHdyb3RlOg0KPiANCj4gDQo+IOWcqCAyMDE45bm0\n" + "MTLmnIgwNeaXpSAwNTozMywgTGVuZGFja3ksIFRob21hcyDlhpnpgZM6DQo+PiBPbiAxMS8yOS8y\n" + "MDE4IDA5OjM3IFBNLCBEYXZlIFlvdW5nIHdyb3RlOg0KPj4+ICsgbW9yZSBwZW9wbGUNCj4+Pg0K\n" + "Pj4+IE9uIDExLzI5LzE4IGF0IDA0OjA5cG0sIExpYW5ibyBKaWFuZyB3cm90ZToNCj4+Pj4gV2hl\n" + "biBkb2luZyBrZXhlY19maWxlX2xvYWQsIHRoZSBmaXJzdCBrZXJuZWwgbmVlZHMgdG8gcGFzcyB0\n" + "aGUgZTgyMA0KPj4+PiByZXNlcnZlZCByYW5nZXMgdG8gdGhlIHNlY29uZCBrZXJuZWwuIEJ1dCBr\n" + "ZXJuZWwgY2FuIG5vdCBleGFjdGx5DQo+Pj4+IG1hdGNoIHRoZSBlODIwIHJlc2VydmVkIHJhbmdl\n" + "cyB3aGVuIHdhbGtpbmcgdGhyb3VnaCB0aGUgaW9tZW0gcmVzb3VyY2VzDQo+Pj4+IHdpdGggdGhl\n" + "IGRlc2NyaXB0b3IgJ0lPUkVTX0RFU0NfTk9ORScsIGJlY2F1c2Ugc2V2ZXJhbCBlODIwIHR5cGVz\n" + 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diff --git a/a/1.txt b/N3/1.txt index 46a2c77..9f0694d 100644 --- a/a/1.txt +++ b/N3/1.txt @@ -210,7 +210,3 @@ Tom >>> Thanks >>> Dave >>> -_______________________________________________ -kexec mailing list -kexec@lists.infradead.org -http://lists.infradead.org/mailman/listinfo/kexec diff --git a/a/content_digest b/N3/content_digest index fe0fb7a..f73a7e7 100644 --- a/a/content_digest +++ b/N3/content_digest @@ -7,24 +7,24 @@ "Subject\0Re: [PATCH 1/2 v8] resource: add the new I/O resource descriptor 'IORES_DESC_RESERVED'\0" "Date\0Mon, 25 Mar 2019 19:34:25 +0000\0" "To\0lijiang <lijiang@redhat.com>\0" - "Cc\0tony.luck@intel.com <tony.luck@intel.com>" - fenghua.yu@intel.com <fenghua.yu@intel.com> - linux-efi@vger.kernel.org <linux-efi@vger.kernel.org> - linux-ia64@vger.kernel.org <linux-ia64@vger.kernel.org> - bhe@redhat.com <bhe@redhat.com> - ard.biesheuvel@linaro.org <ard.biesheuvel@linaro.org> - peterz@infradead.org <peterz@infradead.org> - x86@kernel.org <x86@kernel.org> - kexec@lists.infradead.org <kexec@lists.infradead.org> + "Cc\0Dave Young <dyoung@redhat.com>" linux-kernel@vger.kernel.org <linux-kernel@vger.kernel.org> - dave.hansen@linux.intel.com <dave.hansen@linux.intel.com> + kexec@lists.infradead.org <kexec@lists.infradead.org> + x86@kernel.org <x86@kernel.org> + linux-ia64@vger.kernel.org <linux-ia64@vger.kernel.org> + linux-efi@vger.kernel.org <linux-efi@vger.kernel.org> + tglx@linutronix.de <tglx@linutronix.de> mingo@redhat.com <mingo@redhat.com> bp@alien8.de <bp@alien8.de> + akpm@linux-foundation.org <akpm@linux-foundation.org> + dave.hansen@linux.intel.com <dave.hansen@linux.intel.com> luto@kernel.org <luto@kernel.org> + peterz@infradead.org <peterz@infradead.org> + ard.biesheuvel@linaro.org <ard.biesheuvel@linaro.org> + tony.luck@intel.com <tony.luck@intel.com> + fenghua.yu@intel.com <fenghua.yu@intel.com> + bhe@redhat.com <bhe@redhat.com> Toshi Kani <toshi.kani@hp.com> - tglx@linutronix.de <tglx@linutronix.de> - Dave Young <dyoung@redhat.com> - akpm@linux-foundation.org <akpm@linux-foundation.org> " Dan Williams <dan.j.williams@intel.com>\0" "\00:1\0" "b\0" @@ -239,10 +239,6 @@ ">>>\n" ">>> Thanks\n" ">>> Dave\n" - ">>>\n" - "_______________________________________________\n" - "kexec mailing list\n" - "kexec@lists.infradead.org\n" - http://lists.infradead.org/mailman/listinfo/kexec + >>> -ff965eea65527701cd608ec84a473941b9d8cda1e1926affaae7e799cf561028 +c82578966fc78ae410c83d8826bf8a6d023e009c8dc3348954667e26da0eb556
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