From: "Laszlo Ersek" <lersek@redhat.com>
To: devel@edk2.groups.io, thomas.lendacky@amd.com
Cc: Brijesh Singh <brijesh.singh@amd.com>,
Eric Dong <eric.dong@intel.com>, Ray Ni <ray.ni@intel.com>,
Rahul Kumar <rahul1.kumar@intel.com>
Subject: Re: [edk2-devel] [PATCH v2 02/11] UefiCpuPkg/VmgExitLib: Add interfaces to set/read GHCB ValidBitmap bits
Date: Mon, 19 Oct 2020 22:46:56 +0200 [thread overview]
Message-ID: <0fba81e3-69df-2dca-7b1a-9ab1d0a1c9fc@redhat.com> (raw)
In-Reply-To: <b1542c1dfe96bdcc1f0aaf1c6ff6d5133188125e.1602864557.git.thomas.lendacky@amd.com>
On 10/16/20 18:09, Lendacky, Thomas wrote:
> From: Tom Lendacky <thomas.lendacky@amd.com>
>
> BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=3008
>
> In upcoming patches, the setting of the bits in the GHCB ValidBitmap will
> be performed in multiple places. In order to reduce code duplication, add
> an interface, VmgSetOffsetValid(), to VmgExitLib library to perform this
> function. Also, to keep management of the ValidBitmap within the library,
> add an inteface, VmgIsOffsetValid(), to return whether the bit in the
> ValidBitmap is set for a specified offset.
>
> The new VmgSetOffsetValid() function is a VOID function and will be an
> empty function in the VmgExitLibNull implementation of the VmgExitLib
> library.
>
> The new VmgIsOffsetValid() function returns a BOOLEAN to indicate if the
> offset is valid. This will always return FALSE in the VmgExitLibNull
> implementation of the VmgExitLib library.
>
> Cc: Eric Dong <eric.dong@intel.com>
> Cc: Ray Ni <ray.ni@intel.com>
> Cc: Laszlo Ersek <lersek@redhat.com>
> Cc: Rahul Kumar <rahul1.kumar@intel.com>
> Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
> ---
> UefiCpuPkg/Include/Library/VmgExitLib.h | 37 +++++++++++++++++
> UefiCpuPkg/Library/VmgExitLibNull/VmgExitLibNull.c | 42 ++++++++++++++++++++
> 2 files changed, 79 insertions(+)
>
> diff --git a/UefiCpuPkg/Include/Library/VmgExitLib.h b/UefiCpuPkg/Include/Library/VmgExitLib.h
> index 45fc27d35e29..ba5ea024839e 100644
> --- a/UefiCpuPkg/Include/Library/VmgExitLib.h
> +++ b/UefiCpuPkg/Include/Library/VmgExitLib.h
> @@ -74,6 +74,43 @@ VmgDone (
> IN OUT GHCB *Ghcb
> );
>
> +/**
> + Marks a specified offset as valid in the GHCB.
> +
> + The ValidBitmap area represents the areas of the GHCB that have been marked
> + valid. Set the bit in ValidBitmap for the input offset.
> +
> + @param[in, out] Ghcb A pointer to the GHCB
> + @param[in] Offset Qword offset in the GHCB to mark valid
> +
> +**/
> +VOID
> +EFIAPI
> +VmgSetOffsetValid (
> + IN OUT GHCB *Ghcb,
> + IN GHCB_QWORD_OFFSET Offset
> + );
> +
> +/**
> + Checks if a specified offset is valid in the GHCB.
> +
> + The ValidBitmap area represents the areas of the GHCB that have been marked
> + valid. Return whether the bit in the ValidBitmap is set for the input offset.
> +
> + @param[in] Ghcb A pointer to the GHCB
> + @param[in] Offset Qword offset in the GHCB to mark valid
> +
> + @retval TRUE Offset is marked vald in the GHCB
> + @retval FALSE Offset is not marked valid in the GHCB
> +
> +**/
> +BOOLEAN
> +EFIAPI
> +VmgIsOffsetValid (
> + IN GHCB *Ghcb,
> + IN GHCB_QWORD_OFFSET Offset
> + );
> +
> /**
> Handle a #VC exception.
>
> diff --git a/UefiCpuPkg/Library/VmgExitLibNull/VmgExitLibNull.c b/UefiCpuPkg/Library/VmgExitLibNull/VmgExitLibNull.c
> index bb265e1700d2..b000232c472e 100644
> --- a/UefiCpuPkg/Library/VmgExitLibNull/VmgExitLibNull.c
> +++ b/UefiCpuPkg/Library/VmgExitLibNull/VmgExitLibNull.c
> @@ -89,6 +89,48 @@ VmgDone (
> {
> }
>
> +/**
> + Marks a field at the specified offset as valid in the GHCB.
> +
> + The ValidBitmap area represents the areas of the GHCB that have been marked
> + valid. Set the bit in ValidBitmap for the input offset.
> +
> + @param[in, out] Ghcb Pointer to the Guest-Hypervisor Communication Block
> + @param[in] Offset Qword offset in the GHCB to mark valid
> +
> +**/
> +VOID
> +EFIAPI
> +VmgSetOffsetValid (
> + IN OUT GHCB *Ghcb,
> + IN GHCB_QWORD_OFFSET Offset
> + )
> +{
> +}
> +
> +/**
> + Checks if a specified offset is valid in the GHCB.
> +
> + The ValidBitmap area represents the areas of the GHCB that have been marked
> + valid. Return whether the bit in the ValidBitmap is set for the input offset.
> +
> + @param[in] Ghcb A pointer to the GHCB
> + @param[in] Offset Qword offset in the GHCB to mark valid
> +
> + @retval TRUE Offset is marked vald in the GHCB
> + @retval FALSE Offset is not marked valid in the GHCB
> +
> +**/
> +BOOLEAN
> +EFIAPI
> +VmgIsOffsetValid (
> + IN GHCB *Ghcb,
> + IN GHCB_QWORD_OFFSET Offset
> + )
> +{
> + return FALSE;
> +}
> +
> /**
> Handle a #VC exception.
>
>
s/vald/valid/, twice
With that fixed:
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Thanks
Laszlo
next prev parent reply other threads:[~2020-10-19 20:47 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-16 16:09 [PATCH v2 00/11] SEV-ES guest support fixes and cleanup Lendacky, Thomas
2020-10-16 16:09 ` [PATCH v2 01/11] MdePkg, OvmfPkg: Clean up GHCB field offsets and save area Lendacky, Thomas
2020-10-19 1:41 ` 回复: " gaoliming
2020-10-19 12:50 ` Lendacky, Thomas
2020-10-19 20:17 ` Laszlo Ersek
2020-10-19 20:48 ` Lendacky, Thomas
2020-10-19 20:42 ` Laszlo Ersek
2020-10-20 1:08 ` 回复: " gaoliming
2020-10-20 8:31 ` Laszlo Ersek
2020-10-20 13:10 ` Lendacky, Thomas
2020-10-21 0:54 ` 回复: " gaoliming
2020-10-21 21:54 ` Lendacky, Thomas
2020-10-22 1:25 ` 回复: [edk2-devel] " gaoliming
2020-10-22 13:12 ` Laszlo Ersek
2020-10-23 2:57 ` 回复: " gaoliming
2020-10-26 16:34 ` Lendacky, Thomas
2020-10-27 7:57 ` Dong, Eric
2020-10-28 17:42 ` Lendacky, Thomas
2020-10-21 12:29 ` Laszlo Ersek
2020-10-16 16:09 ` [PATCH v2 02/11] UefiCpuPkg/VmgExitLib: Add interfaces to set/read GHCB ValidBitmap bits Lendacky, Thomas
2020-10-19 20:46 ` Laszlo Ersek [this message]
2020-10-16 16:09 ` [PATCH v2 03/11] OvmfPkg/VmgExitLib: Implement new VmgExitLib interfaces Lendacky, Thomas
2020-10-19 20:51 ` [edk2-devel] " Laszlo Ersek
2020-10-16 16:09 ` [PATCH v2 04/11] OvmfPkg/VmgExitLib: Set the SW exit fields when performing VMGEXIT Lendacky, Thomas
2020-10-19 20:53 ` [edk2-devel] " Laszlo Ersek
2020-10-16 16:09 ` [PATCH v2 05/11] OvmfPkg/VmgExitLib: Set the SwScratch valid bit for IOIO events Lendacky, Thomas
2020-10-19 20:54 ` [edk2-devel] " Laszlo Ersek
2020-10-16 16:09 ` [PATCH v2 06/11] OvmfPkg/VmgExitLib: Set the SwScratch valid bit for MMIO events Lendacky, Thomas
2020-10-16 16:09 ` [PATCH v2 07/11] UefiCpuPkg/MpInitLib: Set the SW exit fields when performing VMGEXIT Lendacky, Thomas
2020-10-16 16:09 ` [PATCH v2 08/11] OvmfPkg/QemuFlashFvbServicesRuntimeDxe: Set the SwScratch valid bit Lendacky, Thomas
2020-10-19 20:57 ` [edk2-devel] " Laszlo Ersek
2020-10-16 16:09 ` [PATCH v2 09/11] OvmfPkg/QemuFlashFvbServicesRuntimeDxe: Fix erase blocks for SEV-ES Lendacky, Thomas
2020-10-16 16:09 ` [PATCH v2 10/11] UefiCpuPkg, OvmfPkg: Disable interrupts when using the GHCB Lendacky, Thomas
2020-10-19 21:07 ` [edk2-devel] " Laszlo Ersek
2020-10-16 16:09 ` [PATCH v2 11/11] UefiCpuPkg/MpInitLib: For SEV-ES guest, set stack based on processor number Lendacky, Thomas
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