From: "Roger Pau Monné" <roger.pau@citrix.com>
To: Anthony PERARD <anthony.perard@citrix.com>
Cc: <devel@edk2.groups.io>, Julien Grall <julien.grall@arm.com>,
<xen-devel@lists.xenproject.org>,
Jordan Justen <jordan.l.justen@intel.com>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Laszlo Ersek <lersek@redhat.com>,
Andrew Cooper <andrew.cooper3@citrix.com>
Subject: Re: [PATCH v4 23/35] OvmfPkg/XenPlatformPei: Rework memory detection
Date: Wed, 7 Aug 2019 17:34:32 +0200 [thread overview]
Message-ID: <20190807152852.e47kogsxubbjkue5@Air-de-Roger> (raw)
In-Reply-To: <20190729153944.24239-24-anthony.perard@citrix.com>
On Mon, Jul 29, 2019 at 04:39:32PM +0100, Anthony PERARD wrote:
> When running as a Xen PVH guest, there is no CMOS to read the memory
> size from. Rework GetSystemMemorySize(Below|Above)4gb() so they can
> work without CMOS by reading the e820 table.
>
> Rework XenPublishRamRegions to also care for the reserved and ACPI
> entry in the e820 table. The region that was added by InitializeXen()
> isn't needed as that same entry is in the e820 table provided by
> hvmloader.
>
> MTRR settings aren't modified anymore, on HVM it's already done by
> hvmloader, on PVH it is supposed to have sane default. MTRR will need
> to be done properly but keeping what's already been done by programmes
^ firmware
> that has runned before OVMF will do for now.
^ ran
> diff --git a/OvmfPkg/XenPlatformPei/Xen.c b/OvmfPkg/XenPlatformPei/Xen.c
> index a21d657357..182e96cc5b 100644
> --- a/OvmfPkg/XenPlatformPei/Xen.c
> +++ b/OvmfPkg/XenPlatformPei/Xen.c
> @@ -276,9 +276,12 @@ XenPublishRamRegions (
> VOID
> )
> {
> - EFI_E820_ENTRY64 *E820Map;
> - UINT32 E820EntriesCount;
> - EFI_STATUS Status;
> + EFI_E820_ENTRY64 *E820Map;
> + UINT32 E820EntriesCount;
> + EFI_STATUS Status;
> + EFI_E820_ENTRY64 *Entry;
> + UINTN Index;
> + EFI_PHYSICAL_ADDRESS LocalApic;
>
> DEBUG ((DEBUG_INFO, "Using memory map provided by Xen\n"));
>
> @@ -287,26 +290,47 @@ XenPublishRamRegions (
> //
> E820EntriesCount = 0;
> Status = XenGetE820Map (&E820Map, &E820EntriesCount);
> -
> ASSERT_EFI_ERROR (Status);
>
> - if (E820EntriesCount > 0) {
> - EFI_E820_ENTRY64 *Entry;
> - UINT32 Loop;
> -
> - for (Loop = 0; Loop < E820EntriesCount; Loop++) {
> - Entry = E820Map + Loop;
> -
> - //
> - // Only care about RAM
> - //
> - if (Entry->Type != EfiAcpiAddressRangeMemory) {
> - continue;
> + LocalApic = PcdGet32(PcdCpuLocalApicBaseAddress);
> + AddIoMemoryBaseSizeHob (LocalApic, SIZE_1MB);
> +
> + for (Index = 0; Index < E820EntriesCount; Index++) {
> + UINT64 Base;
> + UINT64 End;
> +
> + Entry = &E820Map[Index];
> +
> + //
> + // Round up the start address, and round down the end address.
> + //
> + Base = ALIGN_VALUE (Entry->BaseAddr, (UINT64)EFI_PAGE_SIZE);
> + End = (Entry->BaseAddr + Entry->Length) & ~(UINT64)EFI_PAGE_MASK;
> +
> + switch (Entry->Type) {
> + case EfiAcpiAddressRangeMemory:
> + AddMemoryRangeHob (Base, End);
> + break;
> + case EfiAcpiAddressRangeACPI:
> + AddReservedMemoryRangeHob (Base, End, FALSE);
> + break;
> + case EfiAcpiAddressRangeReserved:
> + if (Base < LocalApic && LocalApic < End) {
Don't you also need to check for equality? In case such region starts
at Base == LocalApic?
I guess it doesn't matter that much since this is to workaround a
specific issue with hvmloader, but I would like to see this sorted out
in hvmloader so that there's no clash anymore.
Thanks, Roger.
next prev parent reply other threads:[~2019-08-07 15:34 UTC|newest]
Thread overview: 81+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-29 15:39 [PATCH v4 00/35] Specific platform to run OVMF in Xen PVH and HVM guests Anthony PERARD
2019-07-29 15:39 ` [PATCH v4 01/35] OvmfPkg/ResetSystemLib: Add missing dependency on PciLib Anthony PERARD
2019-07-29 15:39 ` [PATCH v4 02/35] OvmfPkg: Create platform OvmfXen Anthony PERARD
2019-07-30 9:13 ` [edk2-devel] " Laszlo Ersek
2019-07-29 15:39 ` [PATCH v4 03/35] OvmfPkg: Introduce XenResetVector Anthony PERARD
2019-07-30 9:16 ` [edk2-devel] " Laszlo Ersek
2019-07-29 15:39 ` [PATCH v4 04/35] OvmfPkg: Introduce XenPlatformPei Anthony PERARD
2019-07-30 9:21 ` [edk2-devel] " Laszlo Ersek
2019-07-29 15:39 ` [PATCH v4 05/35] OvmfPkg/OvmfXen: Creating an ELF header Anthony PERARD
2019-07-30 9:25 ` [edk2-devel] " Laszlo Ersek
2019-07-29 15:39 ` [PATCH v4 06/35] OvmfPkg/XenResetVector: Add new entry point for Xen PVH Anthony PERARD
2019-07-30 9:33 ` [edk2-devel] " Laszlo Ersek
2019-08-07 11:37 ` Roger Pau Monné
2019-07-29 15:39 ` [PATCH v4 07/35] OvmfPkg/XenResetVector: Saving start of day pointer for PVH guests Anthony PERARD
2019-07-29 15:39 ` [PATCH v4 08/35] OvmfPkg/XenResetVector: Allow jumpstart from either hvmloader or PVH Anthony PERARD
2019-07-29 15:39 ` [PATCH v4 09/35] OvmfPkg/OvmfXen: use a TimerLib instance that depends only on the CPU Anthony PERARD
2019-07-30 9:41 ` [edk2-devel] " Laszlo Ersek
2019-08-07 14:25 ` Roger Pau Monné
2019-07-29 15:39 ` [PATCH v4 10/35] OvmfPkg/XenPlatformPei: Detect OVMF_INFO from hvmloader Anthony PERARD
2019-07-29 15:39 ` [PATCH v4 11/35] OvmfPkg/XenPlatformPei: Use mXenHvmloaderInfo to get E820 Anthony PERARD
2019-07-29 15:39 ` [PATCH v4 12/35] OvmfPkg/XenPlatformPei: Grab RSDP from PVH guest start of day struct Anthony PERARD
2019-08-07 14:35 ` [edk2-devel] " Roger Pau Monné
2019-08-08 10:26 ` Anthony PERARD
2019-08-08 10:40 ` Roger Pau Monné
2019-07-29 15:39 ` [PATCH v4 13/35] OvmfPkg/Library/XenPlatformLib: New library Anthony PERARD
2019-07-30 9:57 ` [edk2-devel] " Laszlo Ersek
2019-07-29 15:39 ` [PATCH v4 14/35] OvmfPkg/AcpiPlatformDxe: Use XenPlatformLib Anthony PERARD
2019-07-29 15:39 ` [PATCH v4 15/35] OvmfPkg/AcpiPlatformDxe: Use Xen PVH RSDP if it exist Anthony PERARD
2019-07-29 15:39 ` [PATCH v4 16/35] OvmfPkg/XenHypercallLib: Enable it in PEIM Anthony PERARD
2019-07-29 15:39 ` [PATCH v4 17/35] OvmfPkg/XenPlatformPei: Reinit XenHypercallLib Anthony PERARD
2019-07-29 15:39 ` [PATCH v4 18/35] OvmfPkg/XenPlatformPei: Introduce XenHvmloaderDetected Anthony PERARD
2019-07-29 15:39 ` [PATCH v4 19/35] OvmfPkg/XenPlatformPei: Setup HyperPages earlier Anthony PERARD
2019-07-29 15:39 ` [PATCH v4 20/35] OvmfPkg/XenPlatformPei: Introduce XenPvhDetected Anthony PERARD
2019-08-07 15:03 ` [edk2-devel] " Roger Pau Monné
2019-08-08 10:38 ` Anthony PERARD
2019-08-08 10:43 ` Roger Pau Monné
2019-07-29 15:39 ` [PATCH v4 21/35] OvmfPkg: Import XENMEM_memory_map hypercall to Xen/memory.h Anthony PERARD
2019-07-29 15:39 ` [PATCH v4 22/35] OvmfPkg/XenPlatformPei: no hvmloader: get the E820 table via hypercall Anthony PERARD
2019-08-07 15:14 ` [edk2-devel] " Roger Pau Monné
2019-08-08 10:41 ` Anthony PERARD
2019-08-08 10:45 ` Roger Pau Monné
2019-07-29 15:39 ` [PATCH v4 23/35] OvmfPkg/XenPlatformPei: Rework memory detection Anthony PERARD
2019-07-30 11:45 ` [edk2-devel] " Laszlo Ersek
2019-07-30 12:18 ` Laszlo Ersek
2019-08-07 15:34 ` Roger Pau Monné [this message]
2019-08-08 11:13 ` Anthony PERARD
2019-07-29 15:39 ` [PATCH v4 24/35] OvmfPkg/XenPlatformPei: Reserve VGA memory region, to boot Linux Anthony PERARD
2019-07-29 15:39 ` [PATCH v4 25/35] OvmfPkg/XenPlatformPei: Ignore missing PCI Host Bridge on Xen PVH Anthony PERARD
2019-07-29 15:39 ` [PATCH v4 26/35] OvmfPkg/XenPlatformLib: Cache result for XenDetected Anthony PERARD
2019-07-29 15:39 ` [PATCH v4 27/35] OvmfPkg/PlatformBootManagerLib: Use XenDetected from XenPlatformLib Anthony PERARD
2019-07-29 15:39 ` [PATCH v4 28/35] OvmfPkg/PlatformBootManagerLib: Handle the absence of PCI bus on Xen PVH Anthony PERARD
2019-08-07 15:50 ` [edk2-devel] " Roger Pau Monné
2019-07-29 15:39 ` [PATCH v4 29/35] OvmfPkg/OvmfXen: Override PcdFSBClock to Xen vLAPIC timer frequency Anthony PERARD
2019-08-07 15:54 ` [edk2-devel] " Roger Pau Monné
2019-08-08 13:28 ` Anthony PERARD
2019-08-08 13:44 ` Roger Pau Monné
2019-08-08 14:26 ` Anthony PERARD
2019-08-08 15:18 ` Roger Pau Monné
2019-08-12 14:45 ` Anthony PERARD
2019-08-08 20:27 ` Laszlo Ersek
2019-07-29 15:39 ` [PATCH v4 30/35] OvmfPkg/OvmfXen: Introduce XenTimerDxe Anthony PERARD
2019-07-30 12:30 ` [edk2-devel] " Laszlo Ersek
2019-07-29 15:39 ` [PATCH v4 31/35] OvmfPkg/PlatformBootManagerLib: Use a Xen console for ConOut/ConIn Anthony PERARD
2019-07-30 12:34 ` [edk2-devel] " Laszlo Ersek
2019-08-07 16:00 ` Roger Pau Monné
2019-07-29 15:39 ` [PATCH v4 32/35] OvmfPkg: Introduce PcdXenGrantFrames Anthony PERARD
2019-07-30 12:47 ` [edk2-devel] " Laszlo Ersek
2019-07-29 15:39 ` [PATCH v4 33/35] OvmfPkg: Introduce XenIoPvhDxe to initialize Grant Tables Anthony PERARD
2019-07-30 13:01 ` [edk2-devel] " Laszlo Ersek
2019-08-07 16:07 ` Roger Pau Monné
2019-08-08 13:53 ` Anthony PERARD
2019-07-29 15:39 ` [PATCH v4 34/35] OvmfPkg: Move XenRealTimeClockLib from ArmVirtPkg Anthony PERARD
2019-07-30 13:05 ` [edk2-devel] " Laszlo Ersek
2019-07-29 15:39 ` [PATCH v4 35/35] OvmfPkg/OvmfXen: use RealTimeClockRuntimeDxe from EmbeddedPkg Anthony PERARD
2019-08-07 16:09 ` [edk2-devel] " Roger Pau Monné
2019-08-08 14:03 ` Anthony PERARD
2019-08-08 15:19 ` Roger Pau Monné
2019-07-30 12:38 ` [edk2-devel] [PATCH v4 00/35] Specific platform to run OVMF in Xen PVH and HVM guests Laszlo Ersek
2019-07-30 13:10 ` Laszlo Ersek
2019-08-12 15:12 ` Anthony PERARD
2019-08-13 9:02 ` Laszlo Ersek
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