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Wed, 07 Feb 2024 07:34:39 -0800 (PST) X-Forwarded-Encrypted: i=1; AJvYcCVEiYt/ZlEJtoORU7kmwIMAhM8Iw4nesL+AsoVCyQWc//fgThW/YHUyMTIdqcVkI0YEo5s3eJqOwNKl9tQpnLqYVTZNvq80ayXn9GaWa+BCvAhclfq4k69iza2SPd8Oapy1kXpxsx9EfEuj6d+QiB45Z3t36+5C From: Roger Pau Monne To: xen-devel@lists.xenproject.org Cc: Roger Pau Monne , Jan Beulich , Andrew Cooper , Wei Liu , Paul Durrant Subject: [PATCH v2 1/2] iommu/x86: introduce a generic IVMD/RMRR range validity helper Date: Wed, 7 Feb 2024 16:34:16 +0100 Message-ID: <20240207153417.89975-2-roger.pau@citrix.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240207153417.89975-1-roger.pau@citrix.com> References: <20240207153417.89975-1-roger.pau@citrix.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-ZohoMail-DKIM: pass (identity @citrix.com) X-ZM-MESSAGEID: 1707320113135100001 IVMD and RMRR ranges are functionally equivalent, and as so could use the s= ame validity checker. Move the IVMD to x86 common IOMMU code and adjust the function to take a pa= ir of [start, end] mfn parameters. So far only the AMD-Vi side is adjusted to use the newly introduced helper,= the VT-d side will be adjusted in a further change. No functional change intended. Signed-off-by: Roger Pau Monn=C3=A9 Reviewed-by: Jan Beulich --- Changes since v1: - Fix usage of ERR/WARN in messages. - Pass region as an inclusive range. - Pass log message prefix. --- xen/arch/x86/include/asm/iommu.h | 3 ++ xen/drivers/passthrough/amd/iommu_acpi.c | 38 ++------------------ xen/drivers/passthrough/x86/iommu.c | 46 ++++++++++++++++++++++++ 3 files changed, 52 insertions(+), 35 deletions(-) diff --git a/xen/arch/x86/include/asm/iommu.h b/xen/arch/x86/include/asm/io= mmu.h index 15a848ddc329..2b97cb442edd 100644 --- a/xen/arch/x86/include/asm/iommu.h +++ b/xen/arch/x86/include/asm/iommu.h @@ -135,6 +135,9 @@ struct page_info *__must_check iommu_alloc_pgtable(stru= ct domain_iommu *hd, uint64_t contig_mask); void iommu_queue_free_pgtable(struct domain_iommu *hd, struct page_info *p= g); =20 +/* Check [start, end] unity map range for correctness. */ +bool iommu_unity_region_ok(const char *prefix, mfn_t start, mfn_t end); + #endif /* !__ARCH_X86_IOMMU_H__ */ /* * Local variables: diff --git a/xen/drivers/passthrough/amd/iommu_acpi.c b/xen/drivers/passthr= ough/amd/iommu_acpi.c index ca70f4f3ae2c..3f5508eba049 100644 --- a/xen/drivers/passthrough/amd/iommu_acpi.c +++ b/xen/drivers/passthrough/amd/iommu_acpi.c @@ -405,41 +405,9 @@ static int __init parse_ivmd_block(const struct acpi_i= vrs_memory *ivmd_block) return 0; } =20 - if ( !e820_all_mapped(base, limit + PAGE_SIZE, E820_RESERVED) ) - { - paddr_t addr; - - AMD_IOMMU_WARN("IVMD: [%lx,%lx) is not (entirely) in reserved memo= ry\n", - base, limit + PAGE_SIZE); - - for ( addr =3D base; addr <=3D limit; addr +=3D PAGE_SIZE ) - { - unsigned int type =3D page_get_ram_type(maddr_to_mfn(addr)); - - if ( type =3D=3D RAM_TYPE_UNKNOWN ) - { - if ( e820_add_range(addr, addr + PAGE_SIZE, - E820_RESERVED) ) - continue; - AMD_IOMMU_ERROR("IVMD: page at %lx couldn't be reserved\n", - addr); - return -EIO; - } - - /* - * Types which aren't RAM are considered good enough. - * Note that a page being partially RESERVED, ACPI or UNUSABLE= will - * force Xen into assuming the whole page as having that type = in - * practice. - */ - if ( type & (RAM_TYPE_RESERVED | RAM_TYPE_ACPI | - RAM_TYPE_UNUSABLE) ) - continue; - - AMD_IOMMU_ERROR("IVMD: page at %lx can't be converted\n", addr= ); - return -EIO; - } - } + if ( !iommu_unity_region_ok("IVMD", maddr_to_mfn(base), + maddr_to_mfn(limit)) ) + return -EIO; =20 if ( ivmd_block->header.flags & ACPI_IVMD_EXCLUSION_RANGE ) exclusion =3D true; diff --git a/xen/drivers/passthrough/x86/iommu.c b/xen/drivers/passthrough/= x86/iommu.c index c90755ff58fa..d867490e25dc 100644 --- a/xen/drivers/passthrough/x86/iommu.c +++ b/xen/drivers/passthrough/x86/iommu.c @@ -792,6 +792,52 @@ static int __init cf_check adjust_irq_affinities(void) } __initcall(adjust_irq_affinities); =20 +bool __init iommu_unity_region_ok(const char *prefix, mfn_t start, mfn_t e= nd) +{ + mfn_t addr; + + if ( e820_all_mapped(mfn_to_maddr(start), mfn_to_maddr(end) + PAGE_SIZ= E, + E820_RESERVED) ) + return true; + + printk(XENLOG_WARNING "%s: [%#" PRI_mfn " ,%#" PRI_mfn + "] is not (entirely) in reserved memory\n", + prefix, mfn_x(start), mfn_x(end)); + + for ( addr =3D start; mfn_x(addr) <=3D mfn_x(end); mfn_add(addr, 1) ) + { + unsigned int type =3D page_get_ram_type(addr); + + if ( type =3D=3D RAM_TYPE_UNKNOWN ) + { + if ( e820_add_range(mfn_to_maddr(addr), + mfn_to_maddr(addr) + PAGE_SIZE, E820_RESER= VED) ) + continue; + printk(XENLOG_ERR + "%s: page at %#" PRI_mfn " couldn't be reserved\n", + prefix, mfn_x(addr)); + return false; + } + + /* + * Types which aren't RAM are considered good enough. + * Note that a page being partially RESERVED, ACPI or UNUSABLE will + * force Xen into assuming the whole page as having that type in + * practice. + */ + if ( type & (RAM_TYPE_RESERVED | RAM_TYPE_ACPI | + RAM_TYPE_UNUSABLE) ) + continue; + + printk(XENLOG_ERR + "%s: page at %#" PRI_mfn " can't be converted\n", + prefix, mfn_x(addr)); + return false; + } + + return true; +} + /* * Local variables: * mode: C --=20 2.43.0 From nobody Fri May 17 07:47:09 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; 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Wed, 07 Feb 2024 07:34:40 -0800 (PST) X-Forwarded-Encrypted: i=1; AJvYcCUEuOBcJ3Alw3uB8O9HITmnlttfnBK6KRhKaEwkWf8MNCIcisvQNBCf9Jn4+syC4ScYJNdapPguiKYrkqXmARi4bV1Iq2/Bls/z+Lig+1Ydl1eFECOqrKogka1yRTAnRMYuXcKGVREpuNr8XwW3hSCPOSY= From: Roger Pau Monne To: xen-devel@lists.xenproject.org Cc: Roger Pau Monne , Kevin Tian , Jan Beulich , Andrew Cooper Subject: [PATCH v2 2/2] iommu/vt-d: switch to common RMRR checker Date: Wed, 7 Feb 2024 16:34:17 +0100 Message-ID: <20240207153417.89975-3-roger.pau@citrix.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240207153417.89975-1-roger.pau@citrix.com> References: <20240207153417.89975-1-roger.pau@citrix.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-ZohoMail-DKIM: pass (identity @citrix.com) X-ZM-MESSAGEID: 1707320113192100003 Use the newly introduced generic unity map checker. Also drop the message recommending the usage of iommu_inclusive_mapping: the ranges would end up being mapped anyway even if some of the checks above failed, regardless of whether iommu_inclusive_mapping is set. Plus such op= tion is not supported for PVH, and it's deprecated. Signed-off-by: Roger Pau Monn=C3=A9 Reviewed-by: Jan Beulich --- Changes since v1: - Adjust to changes in the previous patch. - Expand commit message. --- xen/drivers/passthrough/vtd/dmar.c | 14 +++----------- 1 file changed, 3 insertions(+), 11 deletions(-) diff --git a/xen/drivers/passthrough/vtd/dmar.c b/xen/drivers/passthrough/v= td/dmar.c index 07772f178fe6..76aade816c08 100644 --- a/xen/drivers/passthrough/vtd/dmar.c +++ b/xen/drivers/passthrough/vtd/dmar.c @@ -642,17 +642,9 @@ acpi_parse_one_rmrr(struct acpi_dmar_header *header) return -EEXIST; } =20 - /* This check is here simply to detect when RMRR values are - * not properly represented in the system memory map and - * inform the user - */ - if ( !e820_all_mapped(base_addr, end_addr + 1, E820_RESERVED) && - !e820_all_mapped(base_addr, end_addr + 1, E820_NVS) && - !e820_all_mapped(base_addr, end_addr + 1, E820_ACPI) ) - printk(XENLOG_WARNING VTDPREFIX - " RMRR [%"PRIx64",%"PRIx64"] not in reserved memory;" - " need \"iommu_inclusive_mapping=3D1\"?\n", - base_addr, end_addr); + if ( !iommu_unity_region_ok("RMRR", maddr_to_mfn(base_addr), + maddr_to_mfn(end_addr)) ) + return -EIO; =20 rmrru =3D xzalloc(struct acpi_rmrr_unit); if ( !rmrru ) --=20 2.43.0