diff for duplicates of <f1e5aef5-989c-4f07-82af-9ed54cc192be@redhat.com> diff --git a/a/1.txt b/N1/1.txt index dc8c88b..2c705b2 100644 --- a/a/1.txt +++ b/N1/1.txt @@ -21,3 +21,542 @@ address it? Should fallocate() return -EBUSY? 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+> + if (rc) +> + pr_err_ratelimited("SEV: Failed to PSMASH RMP entry for PFN 0x%llx error %d\n", +> + pfn, rc); +> + } + +Ignoring the PSMASH failure is pretty scary... At this point +.free_folio cannot fail, should the psmash part of this patch be done in +kvm_gmem_invalidate_begin() before kvm_mmu_unmap_gfn_range()? + +Also, can you get PSMASH_FAIL_INUSE and if so what's the best way to +address it? Should fallocate() return -EBUSY? + +Thanks, + +Paolo + + +X-sender: <linux-kernel+bounces-125893-steffen.klassert=secunet.com@vger.kernel.org> +X-Receiver: <steffen.klassert@secunet.com> ORCPT=rfc822;steffen.klassert@secunet.com NOTIFY=NEVER; X-ExtendedProps=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 +X-CreatedBy: MSExchange15 +X-HeloDomain: b.mx.secunet.com +X-ExtendedProps: BQBjAAoAuKNAQuxQ3AgFAGEACAABAAAABQA3AAIAAA8APAAAAE1pY3Jvc29mdC5FeGNoYW5nZS5UcmFuc3BvcnQuTWFpbFJlY2lwaWVudC5Pcmdhbml6YXRpb25TY29wZREAAAAAAAAAAAAAAAAAAAAAAAUASQACAAEFAGIACgBKAAAAo4oAAAUABAAUIAEAAAAcAAAAc3RlZmZlbi5rbGFzc2VydEBzZWN1bmV0LmNvbQUABgACAAEFACkAAgABDwAJAAAAQ0lBdWRpdGVkAgABBQACAAcAAQAAAAUAAwAHAAAAAAAFAAUAAgABBQBkAA8AAwAAAEh1Yg== +X-Source: SMTP:Default MBX-DRESDEN-01 +X-SourceIPAddress: 62.96.220.37 +X-EndOfInjectedXHeaders: 16804 +Received: from cas-essen-01.secunet.de (10.53.40.201) by + mbx-dresden-01.secunet.de (10.53.40.199) with Microsoft SMTP Server + (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id + 15.1.2507.37; 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+> + if (rc) +> + pr_err_ratelimited("SEV: Failed to PSMASH RMP entry for PFN 0x%llx error %d\n", +> + pfn, rc); +> + } + +Ignoring the PSMASH failure is pretty scary... At this point +free_folio cannot fail, should the psmash part of this patch be done in +kvm_gmem_invalidate_begin() before kvm_mmu_unmap_gfn_range()? + +Also, can you get PSMASH_FAIL_INUSE and if so what's the best way to +address it? Should fallocate() return -EBUSY? + +Thanks, + +Paolo diff --git a/a/content_digest b/N1/content_digest index e0b60f3..c0906e4 100644 --- a/a/content_digest +++ b/N1/content_digest @@ -64,6 +64,545 @@ "\n" "Thanks,\n" "\n" + "Paolo\n" + "\n" + "\n" + "X-sender: <kvm+bounces-13158-martin.weber=secunet.com@vger.kernel.org>\n" + "X-Receiver: <martin.weber@secunet.com> ORCPT=rfc822;martin.weber@secunet.com NOTIFY=NEVER; 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(!use_2m_update && rmp_level > PG_LEVEL_4K) {\n" + "> +\t\t\trc = snp_rmptable_psmash(pfn);\n" + "> +\t\t\tif (rc)\n" + "> +\t\t\t\tpr_err_ratelimited(\"SEV: Failed to PSMASH RMP entry for PFN 0x%llx error %d\\n\",\n" + "> +\t\t\t\t\t\t pfn, rc);\n" + "> +\t\t}\n" + "\n" + "Ignoring the PSMASH failure is pretty scary... At this point \n" + ".free_folio cannot fail, should the psmash part of this patch be done in \n" + "kvm_gmem_invalidate_begin() before kvm_mmu_unmap_gfn_range()?\n" + "\n" + "Also, can you get PSMASH_FAIL_INUSE and if so what's the best way to \n" + "address it? Should fallocate() return -EBUSY?\n" + "\n" + "Thanks,\n" + "\n" + "Paolo\n" + "\n" + "\n" + "X-sender: <linux-kernel+bounces-125893-steffen.klassert=secunet.com@vger.kernel.org>\n" + "X-Receiver: <steffen.klassert@secunet.com> ORCPT=rfc822;steffen.klassert@secunet.com NOTIFY=NEVER; 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"X-MS-Exchange-Organization-Processed-By-Journaling: Journal Agent\n" + "\n" + "On 3/29/24 23:58, Michael Roth wrote:\n" + "> +\t\t/*\n" + "> +\t\t * If an unaligned PFN corresponds to a 2M region assigned as a\n" + "> +\t\t * large page in he RMP table, PSMASH the region into individual\n" + "> +\t\t * 4K RMP entries before attempting to convert a 4K sub-page.\n" + "> +\t\t */\n" + "> +\t\tif (!use_2m_update && rmp_level > PG_LEVEL_4K) {\n" + "> +\t\t\trc = snp_rmptable_psmash(pfn);\n" + "> +\t\t\tif (rc)\n" + "> +\t\t\t\tpr_err_ratelimited(\"SEV: Failed to PSMASH RMP entry for PFN 0x%llx error %d\\n\",\n" + "> +\t\t\t\t\t\t pfn, rc);\n" + "> +\t\t}\n" + "\n" + "Ignoring the PSMASH failure is pretty scary... At this point \n" + "free_folio cannot fail, should the psmash part of this patch be done in \n" + "kvm_gmem_invalidate_begin() before kvm_mmu_unmap_gfn_range()?\n" + "\n" + "Also, can you get PSMASH_FAIL_INUSE and if so what's the best way to \n" + "address it? Should fallocate() return -EBUSY?\n" + "\n" + "Thanks,\n" + "\n" Paolo -1d1f85fe09684f2d488e08043cf5a48e5ef5a1711b458351eea47b19b4b2cbb6 +f9f42b9901d1e8f6d556d6f7777860043ad45145f0f688d968d900e431ad635e
diff --git a/a/1.txt b/N2/1.txt index dc8c88b..d3fe763 100644 --- a/a/1.txt +++ b/N2/1.txt @@ -12,7 +12,7 @@ On 3/29/24 23:58, Michael Roth wrote: > + } Ignoring the PSMASH failure is pretty scary... At this point -.free_folio cannot fail, should the psmash part of this patch be done in +free_folio cannot fail, should the psmash part of this patch be done in kvm_gmem_invalidate_begin() before kvm_mmu_unmap_gfn_range()? Also, can you get PSMASH_FAIL_INUSE and if so what's the best way to diff --git a/a/content_digest b/N2/content_digest index e0b60f3..611e652 100644 --- a/a/content_digest +++ b/N2/content_digest @@ -56,7 +56,7 @@ "> +\t\t}\n" "\n" "Ignoring the PSMASH failure is pretty scary... At this point \n" - ".free_folio cannot fail, should the psmash part of this patch be done in \n" + "free_folio cannot fail, should the psmash part of this patch be done in \n" "kvm_gmem_invalidate_begin() before kvm_mmu_unmap_gfn_range()?\n" "\n" "Also, can you get PSMASH_FAIL_INUSE and if so what's the best way to \n" @@ -66,4 +66,4 @@ "\n" Paolo -1d1f85fe09684f2d488e08043cf5a48e5ef5a1711b458351eea47b19b4b2cbb6 +aea022c1057de30120d519ac0a27d7e1fc5d74da3ac4ee531b311a6578e26928
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