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From: Paolo Bonzini <pbonzini@redhat.com>
To: Zixuan Wang <zixuanwang@google.com>,
	kvm@vger.kernel.org, drjones@redhat.com
Cc: marcorr@google.com, baekhw@google.com, tmroeder@google.com,
	erdemaktas@google.com, rientjes@google.com, seanjc@google.com,
	brijesh.singh@amd.com, Thomas.Lendacky@amd.com,
	varad.gautam@suse.com, jroedel@suse.de, bp@suse.de
Subject: Re: [kvm-unit-tests PATCH v2 01/17] x86 UEFI: Copy code from Linux
Date: Mon, 20 Sep 2021 16:33:31 +0200	[thread overview]
Message-ID: <0f423c39-a04d-160e-b3b8-488029080050@redhat.com> (raw)
In-Reply-To: <20210827031222.2778522-2-zixuanwang@google.com>

On 27/08/21 05:12, Zixuan Wang wrote:
> +
> +/*
> + * The UEFI spec and EDK2 reference implementation both define EFI_GUID as
> + * struct { u32 a; u16; b; u16 c; u8 d[8]; }; and so the implied alignment
> + * is 32 bits not 8 bits like our guid_t. In some cases (i.e., on 32-bit ARM),
> + * this means that firmware services invoked by the kernel may assume that
> + * efi_guid_t* arguments are 32-bit aligned, and use memory accessors that
> + * do not tolerate misalignment. So let's set the minimum alignment to 32 bits.

Here you're not doing that though.

Paolo

> + * Note that the UEFI spec as well as some comments in the EDK2 code base
> + * suggest that EFI_GUID should be 64-bit aligned, but this appears to be
> + * a mistake, given that no code seems to exist that actually enforces that
> + * or relies on it.
> + */
> +typedef struct {
> +	u8 b[16];
> +} guid_t;
> +typedef guid_t efi_guid_t;
> +


  reply	other threads:[~2021-09-20 14:33 UTC|newest]

Thread overview: 47+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-27  3:12 [kvm-unit-tests PATCH v2 00/17] x86_64 UEFI and AMD SEV/SEV-ES support Zixuan Wang
2021-08-27  3:12 ` [kvm-unit-tests PATCH v2 01/17] x86 UEFI: Copy code from Linux Zixuan Wang
2021-09-20 14:33   ` Paolo Bonzini [this message]
2021-09-21  3:58     ` Zixuan Wang
2021-09-21  6:37       ` Varad Gautam
2021-09-21 16:33   ` Andrew Jones
2021-09-22 20:10     ` Zixuan Wang
2021-08-27  3:12 ` [kvm-unit-tests PATCH v2 02/17] x86 UEFI: Implement UEFI function calls Zixuan Wang
2021-09-21 16:43   ` Andrew Jones
2021-09-22 20:17     ` Zixuan Wang
2021-08-27  3:12 ` [kvm-unit-tests PATCH v2 03/17] x86 UEFI: Copy code from GNU-EFI Zixuan Wang
2021-10-04 12:44   ` Andrew Jones
2021-10-04 22:09     ` Zixuan Wang
2021-10-05  5:58       ` Andrew Jones
2021-08-27  3:12 ` [kvm-unit-tests PATCH v2 04/17] x86 UEFI: Boot from UEFI Zixuan Wang
2021-10-04 12:55   ` Andrew Jones
2021-10-04 21:30     ` Zixuan Wang
2021-08-27  3:12 ` [kvm-unit-tests PATCH v2 05/17] x86 UEFI: Load IDT after UEFI boot up Zixuan Wang
2021-08-27  3:12 ` [kvm-unit-tests PATCH v2 06/17] x86 UEFI: Load GDT and TSS " Zixuan Wang
2021-09-20 15:40   ` Paolo Bonzini
2021-09-21  4:15     ` Zixuan Wang
2021-08-27  3:12 ` [kvm-unit-tests PATCH v2 07/17] x86 UEFI: Set up memory allocator Zixuan Wang
2021-10-04 13:06   ` Andrew Jones
2021-10-04 21:43     ` Zixuan Wang
2021-10-05  6:05       ` Andrew Jones
2021-08-27  3:12 ` [kvm-unit-tests PATCH v2 08/17] x86 UEFI: Set up RSDP after UEFI boot up Zixuan Wang
2021-10-04 13:21   ` Andrew Jones
2021-10-04 21:58     ` Zixuan Wang
2021-08-27  3:12 ` [kvm-unit-tests PATCH v2 09/17] x86 UEFI: Set up page tables Zixuan Wang
2021-09-20 15:43   ` Paolo Bonzini
2021-09-21  4:31     ` Zixuan Wang
2021-08-27  3:12 ` [kvm-unit-tests PATCH v2 10/17] x86 UEFI: Convert x86 test cases to PIC Zixuan Wang
2021-08-27  3:12 ` [kvm-unit-tests PATCH v2 11/17] x86 AMD SEV: Initial support Zixuan Wang
2021-08-27 14:51   ` Tom Lendacky
2021-08-31 19:36     ` Zixuan Wang
2021-08-27  3:12 ` [kvm-unit-tests PATCH v2 12/17] x86 AMD SEV: Page table with c-bit Zixuan Wang
2021-08-27  3:12 ` [kvm-unit-tests PATCH v2 13/17] x86 AMD SEV-ES: Check SEV-ES status Zixuan Wang
2021-08-27 14:55   ` Tom Lendacky
2021-08-31 19:38     ` Zixuan Wang
2021-08-27  3:12 ` [kvm-unit-tests PATCH v2 14/17] x86 AMD SEV-ES: Load GDT with UEFI segments Zixuan Wang
2021-09-20 16:00   ` Paolo Bonzini
2021-09-21  4:41     ` Zixuan Wang
2021-08-27  3:12 ` [kvm-unit-tests PATCH v2 15/17] x86 AMD SEV-ES: Copy UEFI #VC IDT entry Zixuan Wang
2021-08-27  3:12 ` [kvm-unit-tests PATCH v2 16/17] x86 AMD SEV-ES: Set up GHCB page Zixuan Wang
2021-08-27  3:12 ` [kvm-unit-tests PATCH v2 17/17] x86 AMD SEV-ES: Add test cases Zixuan Wang
2021-10-04 13:27 ` [kvm-unit-tests PATCH v2 00/17] x86_64 UEFI and AMD SEV/SEV-ES support Andrew Jones
2021-10-04 20:54   ` Zixuan Wang

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